Mercurial > sdl-ios-xcode

annotate src/video/SDL_pixels.c @ 1670:eef792d31de8 SDL-1.3

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Work in progress. :)
author Sam Lantinga <slouken@libsdl.org>
date Wed, 07 Jun 2006 16:10:28 +0000
parents 4da1ee79c9af
children 7ae8018b2e5d
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 /* General (mostly internal) pixel/color manipulation routines for SDL */
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25
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26 #include "SDL_endian.h"
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27 #include "SDL_video.h"
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28 #include "SDL_sysvideo.h"
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29 #include "SDL_blit.h"
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30 #include "SDL_pixels_c.h"
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31 #include "SDL_RLEaccel_c.h"
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32
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33 /* Helper functions */
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34
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35 SDL_bool
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36 SDL_PixelFormatEnumToMasks(Uint32 format, int *bpp, Uint32 * Rmask,
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37 Uint32 * Gmask, Uint32 * Bmask, Uint32 * Amask)
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38 {
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39 Uint32 masks[4];
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40
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41 /* Initialize the values here */
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42 if (SDL_BITSPERPIXEL(format) == 24) {
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43 *bpp = SDL_BYTESPERPIXEL(format) * 8;
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44 } else {
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45 *bpp = SDL_BITSPERPIXEL(format);
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46 }
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47 *Rmask = *Gmask = *Bmask = *Amask = 0;
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48
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49 if (SDL_PIXELTYPE(format) != SDL_PixelType_Packed8 &&
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50 SDL_PIXELTYPE(format) != SDL_PixelType_Packed16 &&
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51 SDL_PIXELTYPE(format) != SDL_PixelType_Packed32) {
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52 /* Not a format that uses masks */
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53 return SDL_TRUE;
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54 }
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55
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56 switch (SDL_PIXELLAYOUT(format)) {
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57 case SDL_PackedLayout_332:
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58 masks[0] = 0x00000000;
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59 masks[1] = 0x000000E0;
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60 masks[2] = 0x0000001C;
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61 masks[3] = 0x00000003;
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62 break;
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63 case SDL_PackedLayout_4444:
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64 masks[0] = 0x0000F000;
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65 masks[1] = 0x00000F00;
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66 masks[2] = 0x000000F0;
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67 masks[3] = 0x0000000F;
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68 break;
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69 case SDL_PackedLayout_1555:
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70 masks[0] = 0x00008000;
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71 masks[1] = 0x00007C00;
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72 masks[2] = 0x000003E0;
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73 masks[3] = 0x0000001F;
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74 break;
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75 case SDL_PackedLayout_565:
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76 masks[0] = 0x00000000;
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77 masks[1] = 0x0000F800;
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78 masks[2] = 0x000007E0;
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79 masks[3] = 0x0000001F;
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80 break;
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81 case SDL_PackedLayout_8888:
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82 masks[0] = 0xFF000000;
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83 masks[1] = 0x00FF0000;
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84 masks[2] = 0x0000FF00;
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85 masks[3] = 0x000000FF;
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86 break;
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87 case SDL_PackedLayout_2101010:
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88 masks[0] = 0xC0000000;
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89 masks[1] = 0x3FF00000;
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90 masks[2] = 0x000FFC00;
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91 masks[3] = 0x000003FF;
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92 break;
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93 default:
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94 /* Unknown layout */
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95 return SDL_FALSE;
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96 }
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97
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98 switch (SDL_PIXELORDER(format)) {
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99 case SDL_PackedOrder_XRGB:
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100 *Rmask = masks[1];
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101 *Gmask = masks[2];
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102 *Bmask = masks[3];
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103 break;
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104 case SDL_PackedOrder_RGBX:
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105 *Rmask = masks[0];
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106 *Gmask = masks[1];
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107 *Bmask = masks[2];
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108 break;
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109 case SDL_PackedOrder_ARGB:
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110 *Amask = masks[0];
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111 *Rmask = masks[1];
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112 *Gmask = masks[2];
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113 *Bmask = masks[3];
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114 break;
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115 case SDL_PackedOrder_RGBA:
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116 *Rmask = masks[0];
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117 *Gmask = masks[1];
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118 *Bmask = masks[2];
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119 *Amask = masks[3];
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120 break;
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121 case SDL_PackedOrder_XBGR:
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122 *Bmask = masks[1];
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diff changeset
123 *Gmask = masks[2];
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parents: 1557
diff changeset
124 *Rmask = masks[3];
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
125 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
126 case SDL_PackedOrder_BGRX:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
127 *Bmask = masks[0];
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
128 *Gmask = masks[1];
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
129 *Rmask = masks[2];
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
130 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
131 case SDL_PackedOrder_BGRA:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
132 *Bmask = masks[0];
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parents: 1557
diff changeset
133 *Gmask = masks[1];
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
134 *Rmask = masks[2];
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
135 *Amask = masks[3];
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
136 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
137 case SDL_PackedOrder_ABGR:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
138 *Amask = masks[0];
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parents: 1557
diff changeset
139 *Bmask = masks[1];
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
140 *Gmask = masks[2];
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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parents: 1557
diff changeset
141 *Rmask = masks[3];
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
142 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
143 default:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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parents: 1557
diff changeset
144 /* Unknown order */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
145 return SDL_FALSE;
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Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
146 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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parents: 1557
diff changeset
147 return SDL_TRUE;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
148 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
149
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
150 Uint32
1668
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diff changeset
151 SDL_MasksToPixelFormatEnum(int bpp, Uint32 Rmask, Uint32 Gmask, Uint32 Bmask,
4da1ee79c9af more tweaking indent options
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parents: 1662
diff changeset
152 Uint32 Amask)
1662
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diff changeset
153 {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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parents: 1557
diff changeset
154 switch (bpp) {
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parents: 1557
diff changeset
155 case 8:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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parents: 1557
diff changeset
156 switch (Rmask) {
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parents: 1557
diff changeset
157 case 0:
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158 return SDL_PixelFormat_Index8;
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parents: 1557
diff changeset
159 case 0xE0:
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parents: 1557
diff changeset
160 return SDL_PixelFormat_RGB332;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
161 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
162 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
163 case 12:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
164 switch (Rmask) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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parents: 1557
diff changeset
165 case 0x0F00:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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parents: 1557
diff changeset
166 return SDL_PixelFormat_RGB444;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
167 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
168 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
169 case 15:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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parents: 1557
diff changeset
170 switch (Rmask) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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parents: 1557
diff changeset
171 case 0x7C00:
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parents: 1557
diff changeset
172 return SDL_PixelFormat_RGB555;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
173 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
174 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
175 case 16:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
176 switch (Rmask) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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parents: 1557
diff changeset
177 case 0x0F00:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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parents: 1557
diff changeset
178 return SDL_PixelFormat_ARGB4444;
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parents: 1557
diff changeset
179 case 0x7C00:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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parents: 1557
diff changeset
180 return SDL_PixelFormat_ARGB1555;
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parents: 1557
diff changeset
181 case 0xF800:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
182 return SDL_PixelFormat_RGB565;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
183 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
184 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
185 case 32:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
186 switch (Rmask) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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parents: 1557
diff changeset
187 case 0xFF000000:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
188 if (Amask == 0x000000FF) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
189 return SDL_PixelFormat_RGBA8888;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
190 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
191 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
192 case 0x00FF0000:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
193 if (Amask == 0xFF000000) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
194 return SDL_PixelFormat_ARGB8888;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
195 } else {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
196 return SDL_PixelFormat_RGB888;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
197 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
198 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
199 case 0x0000FF00:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
200 if (Amask == 0x000000FF) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
201 return SDL_PixelFormat_BGRA8888;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
202 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
203 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
204 case 0x000000FF:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
205 if (Amask == 0xFF000000) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
206 return SDL_PixelFormat_ABGR8888;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
207 } else {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
208 return SDL_PixelFormat_BGR888;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
209 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
210 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
211 case 0x3FF00000:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
212 return SDL_PixelFormat_ARGB2101010;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
213 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
214 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
215 return SDL_PixelFormat_Unknown;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
216 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
217
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
218 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
219 * Allocate a pixel format structure and fill it according to the given info.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
220 */
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
221 SDL_PixelFormat *
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
222 SDL_AllocFormat(int bpp,
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
223 Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
224 {
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
225 SDL_PixelFormat *format;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
226 Uint32 mask;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
227
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
228 /* Allocate an empty pixel format structure */
1668
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
229 format = SDL_malloc(sizeof(*format));
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
230 if (format == NULL) {
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
231 SDL_OutOfMemory();
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
232 return (NULL);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
233 }
1668
4da1ee79c9af more tweaking indent options
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parents: 1662
diff changeset
234 SDL_memset(format, 0, sizeof(*format));
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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parents: 1557
diff changeset
235 format->alpha = SDL_ALPHA_OPAQUE;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
236
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
237 /* Set up the format */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
238 format->BitsPerPixel = bpp;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
239 format->BytesPerPixel = (bpp + 7) / 8;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
240 if (Rmask || Bmask || Gmask) { /* Packed pixels with custom mask */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
241 format->palette = NULL;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
242 format->Rshift = 0;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
243 format->Rloss = 8;
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244 if (Rmask) {
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245 for (mask = Rmask; !(mask & 0x01); mask >>= 1)
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246 ++format->Rshift;
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247 for (; (mask & 0x01); mask >>= 1)
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248 --format->Rloss;
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249 }
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250 format->Gshift = 0;
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251 format->Gloss = 8;
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252 if (Gmask) {
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253 for (mask = Gmask; !(mask & 0x01); mask >>= 1)
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254 ++format->Gshift;
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255 for (; (mask & 0x01); mask >>= 1)
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256 --format->Gloss;
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257 }
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258 format->Bshift = 0;
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259 format->Bloss = 8;
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260 if (Bmask) {
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261 for (mask = Bmask; !(mask & 0x01); mask >>= 1)
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262 ++format->Bshift;
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263 for (; (mask & 0x01); mask >>= 1)
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264 --format->Bloss;
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265 }
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266 format->Ashift = 0;
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267 format->Aloss = 8;
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268 if (Amask) {
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269 for (mask = Amask; !(mask & 0x01); mask >>= 1)
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270 ++format->Ashift;
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271 for (; (mask & 0x01); mask >>= 1)
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272 --format->Aloss;
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273 }
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274 format->Rmask = Rmask;
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275 format->Gmask = Gmask;
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276 format->Bmask = Bmask;
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277 format->Amask = Amask;
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278 } else if (bpp > 8) { /* Packed pixels with standard mask */
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279 /* R-G-B */
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280 if (bpp > 24)
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281 bpp = 24;
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282 format->Rloss = 8 - (bpp / 3);
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283 format->Gloss = 8 - (bpp / 3) - (bpp % 3);
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284 format->Bloss = 8 - (bpp / 3);
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285 format->Rshift = ((bpp / 3) + (bpp % 3)) + (bpp / 3);
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286 format->Gshift = (bpp / 3);
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287 format->Bshift = 0;
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288 format->Rmask = ((0xFF >> format->Rloss) << format->Rshift);
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289 format->Gmask = ((0xFF >> format->Gloss) << format->Gshift);
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290 format->Bmask = ((0xFF >> format->Bloss) << format->Bshift);
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291 } else {
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292 /* Palettized formats have no mask info */
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293 format->Rloss = 8;
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294 format->Gloss = 8;
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295 format->Bloss = 8;
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296 format->Aloss = 8;
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297 format->Rshift = 0;
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298 format->Gshift = 0;
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299 format->Bshift = 0;
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300 format->Ashift = 0;
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301 format->Rmask = 0;
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302 format->Gmask = 0;
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303 format->Bmask = 0;
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304 format->Amask = 0;
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305 }
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306 if (bpp <= 8) { /* Palettized mode */
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307 int ncolors = 1 << bpp;
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308 #ifdef DEBUG_PALETTE
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309 fprintf(stderr, "bpp=%d ncolors=%d\n", bpp, ncolors);
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310 #endif
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311 format->palette = (SDL_Palette *) SDL_malloc(sizeof(SDL_Palette));
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312 if (format->palette == NULL) {
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313 SDL_FreeFormat(format);
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314 SDL_OutOfMemory();
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315 return (NULL);
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316 }
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317 (format->palette)->ncolors = ncolors;
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318 (format->palette)->colors = (SDL_Color *) SDL_malloc((format->
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319 palette)->
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320 ncolors *
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321 sizeof
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322 (SDL_Color));
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323 if ((format->palette)->colors == NULL) {
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324 SDL_FreeFormat(format);
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325 SDL_OutOfMemory();
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326 return (NULL);
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327 }
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328 if (Rmask || Bmask || Gmask) {
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329 /* create palette according to masks */
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330 int i;
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331 int Rm = 0, Gm = 0, Bm = 0;
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332 int Rw = 0, Gw = 0, Bw = 0;
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333 #ifdef ENABLE_PALETTE_ALPHA
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334 int Am = 0, Aw = 0;
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335 #endif
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336 if (Rmask) {
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337 Rw = 8 - format->Rloss;
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338 for (i = format->Rloss; i > 0; i -= Rw)
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339 Rm |= 1 << i;
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340 }
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341 #ifdef DEBUG_PALETTE
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342 fprintf(stderr, "Rw=%d Rm=0x%02X\n", Rw, Rm);
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343 #endif
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344 if (Gmask) {
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345 Gw = 8 - format->Gloss;
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346 for (i = format->Gloss; i > 0; i -= Gw)
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347 Gm |= 1 << i;
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348 }
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349 #ifdef DEBUG_PALETTE
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350 fprintf(stderr, "Gw=%d Gm=0x%02X\n", Gw, Gm);
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351 #endif
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352 if (Bmask) {
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353 Bw = 8 - format->Bloss;
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354 for (i = format->Bloss; i > 0; i -= Bw)
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355 Bm |= 1 << i;
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356 }
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357 #ifdef DEBUG_PALETTE
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358 fprintf(stderr, "Bw=%d Bm=0x%02X\n", Bw, Bm);
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359 #endif
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360 #ifdef ENABLE_PALETTE_ALPHA
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361 if (Amask) {
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362 Aw = 8 - format->Aloss;
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363 for (i = format->Aloss; i > 0; i -= Aw)
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364 Am |= 1 << i;
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365 }
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366 # ifdef DEBUG_PALETTE
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367 fprintf(stderr, "Aw=%d Am=0x%02X\n", Aw, Am);
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368 # endif
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369 #endif
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370 for (i = 0; i < ncolors; ++i) {
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371 int r, g, b;
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372 r = (i & Rmask) >> format->Rshift;
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373 r = (r << format->Rloss) | ((r * Rm) >> Rw);
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374 format->palette->colors[i].r = r;
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375
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376 g = (i & Gmask) >> format->Gshift;
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377 g = (g << format->Gloss) | ((g * Gm) >> Gw);
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378 format->palette->colors[i].g = g;
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379
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380 b = (i & Bmask) >> format->Bshift;
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381 b = (b << format->Bloss) | ((b * Bm) >> Bw);
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382 format->palette->colors[i].b = b;
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383
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384 #ifdef ENABLE_PALETTE_ALPHA
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385 a = (i & Amask) >> format->Ashift;
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386 a = (a << format->Aloss) | ((a * Am) >> Aw);
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387 format->palette->colors[i].unused = a;
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388 #else
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389 format->palette->colors[i].unused = 0;
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390 #endif
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391 }
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392 } else if (ncolors == 2) {
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393 /* Create a black and white bitmap palette */
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394 format->palette->colors[0].r = 0xFF;
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395 format->palette->colors[0].g = 0xFF;
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396 format->palette->colors[0].b = 0xFF;
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397 format->palette->colors[1].r = 0x00;
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398 format->palette->colors[1].g = 0x00;
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399 format->palette->colors[1].b = 0x00;
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400 } else {
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401 /* Create an empty palette */
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402 SDL_memset((format->palette)->colors, 0,
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403 (format->palette)->ncolors * sizeof(SDL_Color));
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404 }
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405 }
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406 return (format);
0
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407 }
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408
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409 SDL_PixelFormat *
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410 SDL_ReallocFormat(SDL_Surface * surface, int bpp,
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411 Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask)
0
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412 {
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413 if (surface->format) {
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414 SDL_FreeFormat(surface->format);
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415 SDL_FormatChanged(surface);
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416 }
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417 surface->format = SDL_AllocFormat(bpp, Rmask, Gmask, Bmask, Amask);
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418 return surface->format;
0
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419 }
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420
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421 /*
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422 * Change any previous mappings from/to the new surface format
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423 */
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424 void
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425 SDL_FormatChanged(SDL_Surface * surface)
0
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426 {
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427 static int format_version = 0;
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428 ++format_version;
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429 if (format_version < 0) { /* It wrapped... */
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430 format_version = 1;
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431 }
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432 surface->format_version = format_version;
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433 SDL_InvalidateMap(surface->map);
0
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434 }
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435
0
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436 /*
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437 * Free a previously allocated format structure
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438 */
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439 void
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440 SDL_FreeFormat(SDL_PixelFormat * format)
0
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441 {
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442 if (format) {
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443 if (format->palette) {
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444 if (format->palette->colors) {
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445 SDL_free(format->palette->colors);
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446 }
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447 SDL_free(format->palette);
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448 }
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449 SDL_free(format);
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450 }
0
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451 }
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452
0
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453 /*
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454 * Calculate an 8-bit (3 red, 3 green, 2 blue) dithered palette of colors
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455 */
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456 void
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457 SDL_DitherColors(SDL_Color * colors, int bpp)
0
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458 {
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459 int i;
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diff changeset
460 if (bpp != 8)
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461 return; /* only 8bpp supported right now */
0
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462
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463 for (i = 0; i < 256; i++) {
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464 int r, g, b;
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465 /* map each bit field to the full [0, 255] interval,
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diff changeset
466 so 0 is mapped to (0, 0, 0) and 255 to (255, 255, 255) */
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467 r = i & 0xe0;
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468 r |= r >> 3 | r >> 6;
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diff changeset
469 colors[i].r = r;
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470 g = (i << 3) & 0xe0;
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471 g |= g >> 3 | g >> 6;
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472 colors[i].g = g;
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473 b = i & 0x3;
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474 b |= b << 2;
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475 b |= b << 4;
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diff changeset
476 colors[i].b = b;
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diff changeset
477 }
0
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diff changeset
478 }
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479
0
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diff changeset
480 /*
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diff changeset
481 * Calculate the pad-aligned scanline width of a surface
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diff changeset
482 */
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483 int
1668
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484 SDL_CalculatePitch(SDL_Surface * surface)
0
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diff changeset
485 {
1670
eef792d31de8 Work in progress. :)
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parents: 1668
diff changeset
486 int pitch;
0
74212992fb08 Initial revision
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parents:
diff changeset
487
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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parents: 1557
diff changeset
488 /* Surface should be 4-byte aligned for speed */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
489 pitch = surface->w * surface->format->BytesPerPixel;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
490 switch (surface->format->BitsPerPixel) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
491 case 1:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
492 pitch = (pitch + 7) / 8;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
493 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
494 case 4:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
495 pitch = (pitch + 1) / 2;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
496 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
497 default:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
498 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
499 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
500 pitch = (pitch + 3) & ~3; /* 4-byte aligning */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
501 return (pitch);
0
74212992fb08 Initial revision
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parents:
diff changeset
502 }
1662
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parents: 1557
diff changeset
503
0
74212992fb08 Initial revision
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parents:
diff changeset
504 /*
74212992fb08 Initial revision
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parents:
diff changeset
505 * Match an RGB value to a particular palette index
74212992fb08 Initial revision
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parents:
diff changeset
506 */
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
507 Uint8
1668
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diff changeset
508 SDL_FindColor(SDL_Palette * pal, Uint8 r, Uint8 g, Uint8 b)
0
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parents:
diff changeset
509 {
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
510 /* Do colorspace distance matching */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
511 unsigned int smallest;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
512 unsigned int distance;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
513 int rd, gd, bd;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
514 int i;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
515 Uint8 pixel = 0;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
516
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
517 smallest = ~0;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
518 for (i = 0; i < pal->ncolors; ++i) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
519 rd = pal->colors[i].r - r;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
520 gd = pal->colors[i].g - g;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
521 bd = pal->colors[i].b - b;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
522 distance = (rd * rd) + (gd * gd) + (bd * bd);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
523 if (distance < smallest) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
524 pixel = i;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
525 if (distance == 0) { /* Perfect match! */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
526 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
527 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
528 smallest = distance;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
529 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
530 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
531 return (pixel);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
532 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
533
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
534 /* Find the opaque pixel value corresponding to an RGB triple */
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
535 Uint32
1668
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diff changeset
536 SDL_MapRGB(SDL_PixelFormat * format, Uint8 r, Uint8 g, Uint8 b)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
537 {
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
538 if (format->palette == NULL) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
539 return (r >> format->Rloss) << format->Rshift
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
540 | (g >> format->Gloss) << format->Gshift
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
541 | (b >> format->Bloss) << format->Bshift | format->Amask;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
542 } else {
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
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diff changeset
543 return SDL_FindColor(format->palette, r, g, b);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
544 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
545 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
546
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
547 /* Find the pixel value corresponding to an RGBA quadruple */
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
548 Uint32
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
549 SDL_MapRGBA(SDL_PixelFormat * format, Uint8 r, Uint8 g, Uint8 b, Uint8 a)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
550 {
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
551 if (format->palette == NULL) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
552 return (r >> format->Rloss) << format->Rshift
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
553 | (g >> format->Gloss) << format->Gshift
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
554 | (b >> format->Bloss) << format->Bshift
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
555 | ((a >> format->Aloss) << format->Ashift & format->Amask);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
556 } else {
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
557 return SDL_FindColor(format->palette, r, g, b);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
558 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
559 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
560
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
561 void
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
562 SDL_GetRGBA(Uint32 pixel, SDL_PixelFormat * fmt,
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
563 Uint8 * r, Uint8 * g, Uint8 * b, Uint8 * a)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
564 {
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
565 if (fmt->palette == NULL) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
566 /*
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
567 * This makes sure that the result is mapped to the
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
568 * interval [0..255], and the maximum value for each
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
569 * component is 255. This is important to make sure
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
570 * that white is indeed reported as (255, 255, 255),
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
571 * and that opaque alpha is 255.
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
572 * This only works for RGB bit fields at least 4 bit
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
573 * wide, which is almost always the case.
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
574 */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
575 unsigned v;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
576 v = (pixel & fmt->Rmask) >> fmt->Rshift;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
577 *r = (v << fmt->Rloss) + (v >> (8 - (fmt->Rloss << 1)));
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
578 v = (pixel & fmt->Gmask) >> fmt->Gshift;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
579 *g = (v << fmt->Gloss) + (v >> (8 - (fmt->Gloss << 1)));
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
580 v = (pixel & fmt->Bmask) >> fmt->Bshift;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
581 *b = (v << fmt->Bloss) + (v >> (8 - (fmt->Bloss << 1)));
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
582 if (fmt->Amask) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
583 v = (pixel & fmt->Amask) >> fmt->Ashift;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
584 *a = (v << fmt->Aloss) + (v >> (8 - (fmt->Aloss << 1)));
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
585 } else {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
586 *a = SDL_ALPHA_OPAQUE;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
587 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
588 } else {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
589 *r = fmt->palette->colors[pixel].r;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
590 *g = fmt->palette->colors[pixel].g;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
591 *b = fmt->palette->colors[pixel].b;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
592 *a = SDL_ALPHA_OPAQUE;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
593 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
594 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
595
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
596 void
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
597 SDL_GetRGB(Uint32 pixel, SDL_PixelFormat * fmt, Uint8 * r, Uint8 * g,
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
598 Uint8 * b)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
599 {
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
600 if (fmt->palette == NULL) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
601 /* the note for SDL_GetRGBA above applies here too */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
602 unsigned v;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
603 v = (pixel & fmt->Rmask) >> fmt->Rshift;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
604 *r = (v << fmt->Rloss) + (v >> (8 - (fmt->Rloss << 1)));
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
605 v = (pixel & fmt->Gmask) >> fmt->Gshift;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
606 *g = (v << fmt->Gloss) + (v >> (8 - (fmt->Gloss << 1)));
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
607 v = (pixel & fmt->Bmask) >> fmt->Bshift;
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diff changeset
608 *b = (v << fmt->Bloss) + (v >> (8 - (fmt->Bloss << 1)));
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diff changeset
609 } else {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
610 *r = fmt->palette->colors[pixel].r;
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diff changeset
611 *g = fmt->palette->colors[pixel].g;
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612 *b = fmt->palette->colors[pixel].b;
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613 }
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diff changeset
614 }
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diff changeset
615
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616 /* Apply gamma to a set of colors - this is easy. :) */
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617 void
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618 SDL_ApplyGamma(Uint16 * gamma, SDL_Color * colors, SDL_Color * output,
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619 int ncolors)
0
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620 {
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621 int i;
0
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622
1662
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diff changeset
623 for (i = 0; i < ncolors; ++i) {
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624 output[i].r = gamma[0 * 256 + colors[i].r] >> 8;
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625 output[i].g = gamma[1 * 256 + colors[i].g] >> 8;
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626 output[i].b = gamma[2 * 256 + colors[i].b] >> 8;
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627 }
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628 }
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diff changeset
629
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diff changeset
630 /* Map from Palette to Palette */
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631 static Uint8 *
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632 Map1to1(SDL_Palette * src, SDL_Palette * dst, int *identical)
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633 {
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634 Uint8 *map;
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635 int i;
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636
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637 if (identical) {
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diff changeset
638 if (src->ncolors <= dst->ncolors) {
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diff changeset
639 /* If an identical palette, no need to map */
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640 if (SDL_memcmp(src->colors, dst->colors, src->ncolors *
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diff changeset
641 sizeof(SDL_Color)) == 0) {
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diff changeset
642 *identical = 1;
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643 return (NULL);
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644 }
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645 }
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646 *identical = 0;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
647 }
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648 map = (Uint8 *) SDL_malloc(src->ncolors);
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diff changeset
649 if (map == NULL) {
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diff changeset
650 SDL_OutOfMemory();
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651 return (NULL);
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652 }
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653 for (i = 0; i < src->ncolors; ++i) {
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654 map[i] = SDL_FindColor(dst,
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655 src->colors[i].r, src->colors[i].g,
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656 src->colors[i].b);
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657 }
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658 return (map);
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659 }
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660
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661 /* Map from Palette to BitField */
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662 static Uint8 *
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663 Map1toN(SDL_PixelFormat * src, SDL_PixelFormat * dst)
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664 {
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665 Uint8 *map;
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666 int i;
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667 int bpp;
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diff changeset
668 unsigned alpha;
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669 SDL_Palette *pal = src->palette;
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670
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671 bpp = ((dst->BytesPerPixel == 3) ? 4 : dst->BytesPerPixel);
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672 map = (Uint8 *) SDL_malloc(pal->ncolors * bpp);
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diff changeset
673 if (map == NULL) {
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674 SDL_OutOfMemory();
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675 return (NULL);
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diff changeset
676 }
0
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diff changeset
677
1662
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diff changeset
678 alpha = dst->Amask ? src->alpha : 0;
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diff changeset
679 /* We memory copy to the pixel map so the endianness is preserved */
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680 for (i = 0; i < pal->ncolors; ++i) {
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diff changeset
681 ASSEMBLE_RGBA(&map[i * bpp], dst->BytesPerPixel, dst,
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diff changeset
682 pal->colors[i].r, pal->colors[i].g,
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diff changeset
683 pal->colors[i].b, alpha);
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diff changeset
684 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
685 return (map);
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diff changeset
686 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
687
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
688 /* Map from BitField to Dithered-Palette to Palette */
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diff changeset
689 static Uint8 *
1668
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diff changeset
690 MapNto1(SDL_PixelFormat * src, SDL_PixelFormat * dst, int *identical)
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
691 {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
692 /* Generate a 256 color dither palette */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
693 SDL_Palette dithered;
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diff changeset
694 SDL_Color colors[256];
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diff changeset
695 SDL_Palette *pal = dst->palette;
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diff changeset
696
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diff changeset
697 /* SDL_DitherColors does not initialize the 'unused' component of colors,
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
698 but Map1to1 compares it against pal, so we should initialize it. */
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699 SDL_memset(colors, 0, sizeof(colors));
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diff changeset
700
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
701 dithered.ncolors = 256;
1668
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diff changeset
702 SDL_DitherColors(colors, 8);
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diff changeset
703 dithered.colors = colors;
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diff changeset
704 return (Map1to1(&dithered, pal, identical));
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diff changeset
705 }
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diff changeset
706
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
707 SDL_BlitMap *
1668
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diff changeset
708 SDL_AllocBlitMap(void)
0
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diff changeset
709 {
1662
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diff changeset
710 SDL_BlitMap *map;
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diff changeset
711
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
712 /* Allocate the empty map */
1668
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diff changeset
713 map = (SDL_BlitMap *) SDL_malloc(sizeof(*map));
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diff changeset
714 if (map == NULL) {
1668
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diff changeset
715 SDL_OutOfMemory();
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
716 return (NULL);
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diff changeset
717 }
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diff changeset
718 SDL_memset(map, 0, sizeof(*map));
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diff changeset
719
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782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
720 /* Allocate the software blit data */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
721 map->sw_data =
1668
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diff changeset
722 (struct private_swaccel *) SDL_malloc(sizeof(*map->sw_data));
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
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diff changeset
723 if (map->sw_data == NULL) {
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diff changeset
724 SDL_FreeBlitMap(map);
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diff changeset
725 SDL_OutOfMemory();
1662
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diff changeset
726 return (NULL);
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diff changeset
727 }
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diff changeset
728 SDL_memset(map->sw_data, 0, sizeof(*map->sw_data));
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diff changeset
729
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
730 /* It's ready to go */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
731 return (map);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
732 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
733
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
734 void
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
735 SDL_InvalidateMap(SDL_BlitMap * map)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
736 {
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
737 if (!map) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
738 return;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
739 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
740 map->dst = NULL;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
741 map->format_version = (unsigned int) -1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
742 if (map->table) {
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
743 SDL_free(map->table);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
744 map->table = NULL;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
745 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
746 }
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
747 int
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
748 SDL_MapSurface(SDL_Surface * src, SDL_Surface * dst)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
749 {
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
750 SDL_PixelFormat *srcfmt;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
751 SDL_PixelFormat *dstfmt;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
752 SDL_BlitMap *map;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
753
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
754 /* Clear out any previous mapping */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
755 map = src->map;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
756 if ((src->flags & SDL_RLEACCEL) == SDL_RLEACCEL) {
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
757 SDL_UnRLESurface(src, 1);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
758 }
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
759 SDL_InvalidateMap(map);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
760
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
761 /* Figure out what kind of mapping we're doing */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
762 map->identity = 0;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
763 srcfmt = src->format;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
764 dstfmt = dst->format;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
765 switch (srcfmt->BytesPerPixel) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
766 case 1:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
767 switch (dstfmt->BytesPerPixel) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
768 case 1:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
769 /* Palette --> Palette */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
770 /* If both SDL_HWSURFACE, assume have same palette */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
771 if (((src->flags & SDL_HWSURFACE) == SDL_HWSURFACE) &&
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
772 ((dst->flags & SDL_HWSURFACE) == SDL_HWSURFACE)) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
773 map->identity = 1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
774 } else {
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
775 map->table = Map1to1(srcfmt->palette,
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
776 dstfmt->palette, &map->identity);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
777 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
778 if (!map->identity) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
779 if (map->table == NULL) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
780 return (-1);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
781 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
782 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
783 if (srcfmt->BitsPerPixel != dstfmt->BitsPerPixel)
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
784 map->identity = 0;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
785 break;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
786
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
787 default:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
788 /* Palette --> BitField */
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
789 map->table = Map1toN(srcfmt, dstfmt);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
790 if (map->table == NULL) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
791 return (-1);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
792 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
793 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
794 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
795 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
796 default:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
797 switch (dstfmt->BytesPerPixel) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
798 case 1:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
799 /* BitField --> Palette */
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
800 map->table = MapNto1(srcfmt, dstfmt, &map->identity);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
801 if (!map->identity) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
802 if (map->table == NULL) {
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
803 return (-1);
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
804 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
805 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
806 map->identity = 0; /* Don't optimize to copy */
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
807 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
808 default:
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
809 /* BitField --> BitField */
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
810 if (FORMAT_EQUAL(srcfmt, dstfmt))
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
811 map->identity = 1;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
812 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
813 }
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
814 break;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
815 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
816
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
817 map->dst = dst;
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
818 map->format_version = dst->format_version;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
819
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
820 /* Choose your blitters wisely */
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
821 return (SDL_CalculateBlit(src));
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
822 }
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
823
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
824 void
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
825 SDL_FreeBlitMap(SDL_BlitMap * map)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
826 {
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
827 if (map) {
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
828 SDL_InvalidateMap(map);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
829 if (map->sw_data != NULL) {
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
830 SDL_free(map->sw_data);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
831 }
1668
4da1ee79c9af more tweaking indent options
Sam Lantinga <slouken@libsdl.org>
parents: 1662
diff changeset
832 SDL_free(map);
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
833 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
834 }
1662
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
835
782fd950bd46 Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
Sam Lantinga <slouken@libsdl.org>
parents: 1557
diff changeset
836 /* vi: set ts=4 sw=4 expandtab: */