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annotate src/video/SDL_bmp.c @ 1662:782fd950bd46 SDL-1.3

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Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API. WARNING: None of the video drivers have been updated for the new API yet! The API is still under design and very fluid. The code is now run through a consistent indent format: indent -i4 -nut -nsc -br -ce The headers are being converted to automatically generate doxygen documentation.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 28 May 2006 13:04:16 +0000
parents d910939febfa
children 4da1ee79c9af
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 /*
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25 Code to load and save surfaces in Windows BMP format.
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26
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27 Why support BMP format? Well, it's a native format for Windows, and
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28 most image processing programs can read and write it. It would be nice
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29 to be able to have at least one image format that we can natively load
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30 and save, and since PNG is so complex that it would bloat the library,
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31 BMP is a good alternative.
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32
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33 This code currently supports Win32 DIBs in uncompressed 8 and 24 bpp.
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34 */
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35
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36 #include "SDL_video.h"
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37 #include "SDL_endian.h"
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38
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39 /* Compression encodings for BMP files */
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40 #ifndef BI_RGB
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41 #define BI_RGB 0
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42 #define BI_RLE8 1
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43 #define BI_RLE4 2
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44 #define BI_BITFIELDS 3
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45 #endif
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46
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47
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48 SDL_Surface *
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49 SDL_LoadBMP_RW (SDL_RWops * src, int freesrc)
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50 {
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51 int was_error;
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52 long fp_offset;
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53 int bmpPitch;
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54 int i, pad;
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55 SDL_Surface *surface;
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56 Uint32 Rmask;
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57 Uint32 Gmask;
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58 Uint32 Bmask;
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59 SDL_Palette *palette;
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60 Uint8 *bits;
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61 int ExpandBMP;
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62
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63 /* The Win32 BMP file header (14 bytes) */
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64 char magic[2];
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65 Uint32 bfSize;
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66 Uint16 bfReserved1;
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67 Uint16 bfReserved2;
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68 Uint32 bfOffBits;
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69
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70 /* The Win32 BITMAPINFOHEADER struct (40 bytes) */
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71 Uint32 biSize;
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72 Sint32 biWidth;
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73 Sint32 biHeight;
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74 Uint16 biPlanes;
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75 Uint16 biBitCount;
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76 Uint32 biCompression;
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77 Uint32 biSizeImage;
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78 Sint32 biXPelsPerMeter;
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79 Sint32 biYPelsPerMeter;
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80 Uint32 biClrUsed;
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81 Uint32 biClrImportant;
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82
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83 /* Make sure we are passed a valid data source */
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84 surface = NULL;
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85 was_error = 0;
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86 if (src == NULL) {
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87 was_error = 1;
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88 goto done;
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89 }
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90
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91 /* Read in the BMP file header */
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92 fp_offset = SDL_RWtell (src);
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93 SDL_ClearError ();
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94 if (SDL_RWread (src, magic, 1, 2) != 2) {
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95 SDL_Error (SDL_EFREAD);
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96 was_error = 1;
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97 goto done;
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98 }
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99 if (SDL_strncmp (magic, "BM", 2) != 0) {
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100 SDL_SetError ("File is not a Windows BMP file");
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101 was_error = 1;
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102 goto done;
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103 }
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104 bfSize = SDL_ReadLE32 (src);
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105 bfReserved1 = SDL_ReadLE16 (src);
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106 bfReserved2 = SDL_ReadLE16 (src);
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107 bfOffBits = SDL_ReadLE32 (src);
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108
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109 /* Read the Win32 BITMAPINFOHEADER */
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110 biSize = SDL_ReadLE32 (src);
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111 if (biSize == 12) {
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112 biWidth = (Uint32) SDL_ReadLE16 (src);
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113 biHeight = (Uint32) SDL_ReadLE16 (src);
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114 biPlanes = SDL_ReadLE16 (src);
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115 biBitCount = SDL_ReadLE16 (src);
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116 biCompression = BI_RGB;
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117 biSizeImage = 0;
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118 biXPelsPerMeter = 0;
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119 biYPelsPerMeter = 0;
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120 biClrUsed = 0;
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121 biClrImportant = 0;
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122 } else {
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123 biWidth = SDL_ReadLE32 (src);
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124 biHeight = SDL_ReadLE32 (src);
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125 biPlanes = SDL_ReadLE16 (src);
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126 biBitCount = SDL_ReadLE16 (src);
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parents: 1402
diff changeset
127 biCompression = SDL_ReadLE32 (src);
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: 1402
diff changeset
128 biSizeImage = SDL_ReadLE32 (src);
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: 1402
diff changeset
129 biXPelsPerMeter = SDL_ReadLE32 (src);
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: 1402
diff changeset
130 biYPelsPerMeter = SDL_ReadLE32 (src);
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: 1402
diff changeset
131 biClrUsed = SDL_ReadLE32 (src);
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: 1402
diff changeset
132 biClrImportant = SDL_ReadLE32 (src);
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: 1402
diff changeset
133 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
134
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: 1402
diff changeset
135 /* Check for read error */
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: 1402
diff changeset
136 if (SDL_strcmp (SDL_GetError (), "") != 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: 1402
diff changeset
137 was_error = 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: 1402
diff changeset
138 goto done;
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: 1402
diff changeset
139 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
140
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: 1402
diff changeset
141 /* Expand 1 and 4 bit bitmaps to 8 bits per pixel */
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: 1402
diff changeset
142 switch (biBitCount) {
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: 1402
diff changeset
143 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: 1402
diff changeset
144 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: 1402
diff changeset
145 ExpandBMP = biBitCount;
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: 1402
diff changeset
146 biBitCount = 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: 1402
diff changeset
147 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: 1402
diff changeset
148 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: 1402
diff changeset
149 ExpandBMP = 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: 1402
diff changeset
150 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: 1402
diff changeset
151 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
152
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: 1402
diff changeset
153 /* We don't support any BMP compression right now */
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: 1402
diff changeset
154 Rmask = Gmask = Bmask = 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: 1402
diff changeset
155 switch (biCompression) {
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: 1402
diff changeset
156 case BI_RGB:
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: 1402
diff changeset
157 /* If there are no masks, use the defaults */
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: 1402
diff changeset
158 if (bfOffBits == (14 + biSize)) {
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: 1402
diff changeset
159 /* Default values for the BMP 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: 1402
diff changeset
160 switch (biBitCount) {
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: 1402
diff changeset
161 case 15:
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: 1402
diff changeset
162 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: 1402
diff changeset
163 Rmask = 0x7C00;
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: 1402
diff changeset
164 Gmask = 0x03E0;
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: 1402
diff changeset
165 Bmask = 0x001F;
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: 1402
diff changeset
166 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: 1402
diff changeset
167 case 24:
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
168 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
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: 1402
diff changeset
169 Rmask = 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: 1402
diff changeset
170 Gmask = 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: 1402
diff changeset
171 Bmask = 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: 1402
diff changeset
172 break;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
173 #endif
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: 1402
diff changeset
174 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: 1402
diff changeset
175 Rmask = 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: 1402
diff changeset
176 Gmask = 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: 1402
diff changeset
177 Bmask = 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: 1402
diff changeset
178 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: 1402
diff changeset
179 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: 1402
diff changeset
180 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: 1402
diff changeset
181 }
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: 1402
diff changeset
182 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: 1402
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: 1402
diff changeset
184 /* Fall through -- read the RGB masks */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
185
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: 1402
diff changeset
186 case BI_BITFIELDS:
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: 1402
diff changeset
187 switch (biBitCount) {
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: 1402
diff changeset
188 case 15:
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: 1402
diff changeset
189 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: 1402
diff changeset
190 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: 1402
diff changeset
191 Rmask = SDL_ReadLE32 (src);
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: 1402
diff changeset
192 Gmask = SDL_ReadLE32 (src);
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: 1402
diff changeset
193 Bmask = SDL_ReadLE32 (src);
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: 1402
diff changeset
194 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: 1402
diff changeset
195 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: 1402
diff changeset
196 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: 1402
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: 1402
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: 1402
diff changeset
199 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: 1402
diff changeset
200 SDL_SetError ("Compressed BMP files not supported");
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: 1402
diff changeset
201 was_error = 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: 1402
diff changeset
202 goto done;
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: 1402
diff changeset
203 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
204
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: 1402
diff changeset
205 /* Create a compatible surface, note that the colors are RGB ordered */
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: 1402
diff changeset
206 surface = SDL_CreateRGBSurface (SDL_SWSURFACE,
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: 1402
diff changeset
207 biWidth, biHeight, biBitCount, Rmask,
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: 1402
diff changeset
208 Gmask, Bmask, 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: 1402
diff changeset
209 if (surface == 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: 1402
diff changeset
210 was_error = 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: 1402
diff changeset
211 goto done;
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: 1402
diff changeset
212 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
213
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: 1402
diff changeset
214 /* Load the palette, if any */
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: 1402
diff changeset
215 palette = (surface->format)->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: 1402
diff changeset
216 if (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: 1402
diff changeset
217 if (biClrUsed == 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: 1402
diff changeset
218 biClrUsed = 1 << biBitCount;
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: 1402
diff changeset
219 }
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: 1402
diff changeset
220 if (biSize == 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: 1402
diff changeset
221 for (i = 0; i < (int) biClrUsed; ++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: 1402
diff changeset
222 SDL_RWread (src, &palette->colors[i].b, 1, 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: 1402
diff changeset
223 SDL_RWread (src, &palette->colors[i].g, 1, 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: 1402
diff changeset
224 SDL_RWread (src, &palette->colors[i].r, 1, 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: 1402
diff changeset
225 palette->colors[i].unused = 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: 1402
diff changeset
226 }
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: 1402
diff changeset
227 } 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: 1402
diff changeset
228 for (i = 0; i < (int) biClrUsed; ++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: 1402
diff changeset
229 SDL_RWread (src, &palette->colors[i].b, 1, 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: 1402
diff changeset
230 SDL_RWread (src, &palette->colors[i].g, 1, 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: 1402
diff changeset
231 SDL_RWread (src, &palette->colors[i].r, 1, 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: 1402
diff changeset
232 SDL_RWread (src, &palette->colors[i].unused, 1, 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: 1402
diff changeset
233 }
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: 1402
diff changeset
234 }
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: 1402
diff changeset
235 palette->ncolors = biClrUsed;
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: 1402
diff changeset
236 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
237
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: 1402
diff changeset
238 /* Read the surface pixels. Note that the bmp image is upside down */
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: 1402
diff changeset
239 if (SDL_RWseek (src, fp_offset + bfOffBits, RW_SEEK_SET) < 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: 1402
diff changeset
240 SDL_Error (SDL_EFSEEK);
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: 1402
diff changeset
241 was_error = 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: 1402
diff changeset
242 goto done;
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: 1402
diff changeset
243 }
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: 1402
diff changeset
244 bits = (Uint8 *) surface->pixels + (surface->h * surface->pitch);
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: 1402
diff changeset
245 switch (ExpandBMP) {
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: 1402
diff changeset
246 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: 1402
diff changeset
247 bmpPitch = (biWidth + 7) >> 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: 1402
diff changeset
248 pad = (((bmpPitch) % 4) ? (4 - ((bmpPitch) % 4)) : 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: 1402
diff changeset
249 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: 1402
diff changeset
250 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: 1402
diff changeset
251 bmpPitch = (biWidth + 1) >> 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: 1402
diff changeset
252 pad = (((bmpPitch) % 4) ? (4 - ((bmpPitch) % 4)) : 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: 1402
diff changeset
253 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: 1402
diff changeset
254 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: 1402
diff changeset
255 pad = ((surface->pitch % 4) ? (4 - (surface->pitch % 4)) : 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: 1402
diff changeset
256 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: 1402
diff changeset
257 }
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: 1402
diff changeset
258 while (bits > (Uint8 *) surface->pixels) {
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: 1402
diff changeset
259 bits -= surface->pitch;
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: 1402
diff changeset
260 switch (ExpandBMP) {
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: 1402
diff changeset
261 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: 1402
diff changeset
262 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: 1402
diff changeset
263 {
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: 1402
diff changeset
264 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: 1402
diff changeset
265 int shift = (8 - ExpandBMP);
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: 1402
diff changeset
266 for (i = 0; i < surface->w; ++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: 1402
diff changeset
267 if (i % (8 / ExpandBMP) == 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: 1402
diff changeset
268 if (!SDL_RWread (src, &pixel, 1, 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: 1402
diff changeset
269 SDL_SetError ("Error reading from BMP");
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: 1402
diff changeset
270 was_error = 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: 1402
diff changeset
271 goto done;
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: 1402
diff changeset
272 }
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: 1402
diff changeset
273 }
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: 1402
diff changeset
274 *(bits + i) = (pixel >> shift);
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: 1402
diff changeset
275 pixel <<= ExpandBMP;
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: 1402
diff changeset
276 }
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: 1402
diff changeset
277 }
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: 1402
diff changeset
278 break;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
279
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: 1402
diff changeset
280 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: 1402
diff changeset
281 if (SDL_RWread (src, bits, 1, surface->pitch)
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: 1402
diff changeset
282 != surface->pitch) {
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: 1402
diff changeset
283 SDL_Error (SDL_EFREAD);
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: 1402
diff changeset
284 was_error = 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: 1402
diff changeset
285 goto done;
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: 1402
diff changeset
286 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
287 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
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: 1402
diff changeset
288 /* Byte-swap the pixels if needed. Note that the 24bpp
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: 1402
diff changeset
289 case has already been taken care of above. */
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: 1402
diff changeset
290 switch (biBitCount) {
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: 1402
diff changeset
291 case 15:
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: 1402
diff changeset
292 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: 1402
diff changeset
293 {
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: 1402
diff changeset
294 Uint16 *pix = (Uint16 *) bits;
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: 1402
diff changeset
295 for (i = 0; i < surface->w; 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: 1402
diff changeset
296 pix[i] = SDL_Swap16 (pix[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: 1402
diff changeset
297 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: 1402
diff changeset
298 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
299
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: 1402
diff changeset
300 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: 1402
diff changeset
301 {
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: 1402
diff changeset
302 Uint32 *pix = (Uint32 *) bits;
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: 1402
diff changeset
303 for (i = 0; i < surface->w; 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: 1402
diff changeset
304 pix[i] = SDL_Swap32 (pix[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: 1402
diff changeset
305 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: 1402
diff changeset
306 }
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: 1402
diff changeset
307 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
308 #endif
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: 1402
diff changeset
309 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: 1402
diff changeset
310 }
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: 1402
diff changeset
311 /* Skip padding bytes, ugh */
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: 1402
diff changeset
312 if (pad) {
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: 1402
diff changeset
313 Uint8 padbyte;
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: 1402
diff changeset
314 for (i = 0; i < pad; ++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: 1402
diff changeset
315 SDL_RWread (src, &padbyte, 1, 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: 1402
diff changeset
316 }
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: 1402
diff changeset
317 }
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: 1402
diff changeset
318 }
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: 1402
diff changeset
319 done:
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: 1402
diff changeset
320 if (was_error) {
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: 1402
diff changeset
321 if (src) {
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: 1402
diff changeset
322 SDL_RWseek (src, fp_offset, RW_SEEK_SET);
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: 1402
diff changeset
323 }
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: 1402
diff changeset
324 if (surface) {
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: 1402
diff changeset
325 SDL_FreeSurface (surface);
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: 1402
diff changeset
326 }
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: 1402
diff changeset
327 surface = 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: 1402
diff changeset
328 }
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: 1402
diff changeset
329 if (freesrc && src) {
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: 1402
diff changeset
330 SDL_RWclose (src);
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: 1402
diff changeset
331 }
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: 1402
diff changeset
332 return (surface);
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
333 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
334
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: 1402
diff changeset
335 int
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: 1402
diff changeset
336 SDL_SaveBMP_RW (SDL_Surface * saveme, SDL_RWops * dst, int freedst)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
337 {
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: 1402
diff changeset
338 long fp_offset;
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: 1402
diff changeset
339 int i, pad;
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: 1402
diff changeset
340 SDL_Surface *surface;
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: 1402
diff changeset
341 Uint8 *bits;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
342
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: 1402
diff changeset
343 /* The Win32 BMP file header (14 bytes) */
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: 1402
diff changeset
344 char magic[2] = { 'B', 'M' };
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: 1402
diff changeset
345 Uint32 bfSize;
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: 1402
diff changeset
346 Uint16 bfReserved1;
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: 1402
diff changeset
347 Uint16 bfReserved2;
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: 1402
diff changeset
348 Uint32 bfOffBits;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
349
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: 1402
diff changeset
350 /* The Win32 BITMAPINFOHEADER struct (40 bytes) */
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: 1402
diff changeset
351 Uint32 biSize;
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: 1402
diff changeset
352 Sint32 biWidth;
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: 1402
diff changeset
353 Sint32 biHeight;
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: 1402
diff changeset
354 Uint16 biPlanes;
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: 1402
diff changeset
355 Uint16 biBitCount;
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: 1402
diff changeset
356 Uint32 biCompression;
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: 1402
diff changeset
357 Uint32 biSizeImage;
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: 1402
diff changeset
358 Sint32 biXPelsPerMeter;
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: 1402
diff changeset
359 Sint32 biYPelsPerMeter;
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: 1402
diff changeset
360 Uint32 biClrUsed;
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: 1402
diff changeset
361 Uint32 biClrImportant;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
362
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: 1402
diff changeset
363 /* Make sure we have somewhere to save */
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: 1402
diff changeset
364 surface = NULL;
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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365 if (dst) {
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366 if (saveme->format->palette) {
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diff changeset
367 if (saveme->format->BitsPerPixel == 8) {
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368 surface = saveme;
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diff changeset
369 } else {
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370 SDL_SetError ("%d bpp BMP files not supported",
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diff changeset
371 saveme->format->BitsPerPixel);
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diff changeset
372 }
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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373 } else if ((saveme->format->BitsPerPixel == 24) &&
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374 #if SDL_BYTEORDER == SDL_LIL_ENDIAN
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375 (saveme->format->Rmask == 0x00FF0000) &&
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diff changeset
376 (saveme->format->Gmask == 0x0000FF00) &&
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377 (saveme->format->Bmask == 0x000000FF)
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378 #else
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379 (saveme->format->Rmask == 0x000000FF) &&
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380 (saveme->format->Gmask == 0x0000FF00) &&
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381 (saveme->format->Bmask == 0x00FF0000)
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382 #endif
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383 ) {
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384 surface = saveme;
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385 } else {
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386 SDL_Rect bounds;
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387
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388 /* Convert to 24 bits per pixel */
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389 surface = SDL_CreateRGBSurface (SDL_SWSURFACE,
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390 saveme->w, saveme->h, 24,
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391 #if SDL_BYTEORDER == SDL_LIL_ENDIAN
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392 0x00FF0000, 0x0000FF00,
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393 0x000000FF,
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394 #else
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395 0x000000FF, 0x0000FF00,
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396 0x00FF0000,
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397 #endif
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398 0);
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399 if (surface != NULL) {
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400 bounds.x = 0;
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401 bounds.y = 0;
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402 bounds.w = saveme->w;
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diff changeset
403 bounds.h = saveme->h;
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diff changeset
404 if (SDL_LowerBlit (saveme, &bounds, surface, &bounds) < 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
405 SDL_FreeSurface (surface);
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406 SDL_SetError ("Couldn't convert image to 24 bpp");
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diff changeset
407 surface = NULL;
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diff changeset
408 }
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diff changeset
409 }
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diff changeset
410 }
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diff changeset
411 }
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412
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413 if (surface && (SDL_LockSurface (surface) == 0)) {
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diff changeset
414 const int bw = surface->w * surface->format->BytesPerPixel;
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415
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diff changeset
416 /* Set the BMP file header values */
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417 bfSize = 0; /* We'll write this when we're done */
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418 bfReserved1 = 0;
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419 bfReserved2 = 0;
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420 bfOffBits = 0; /* We'll write this when we're done */
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f14e3059e138 Date: Mon, 13 Dec 2004 21:28:18 -0500
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parents: 769
diff changeset
421
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422 /* Write the BMP file header values */
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423 fp_offset = SDL_RWtell (dst);
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424 SDL_ClearError ();
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425 SDL_RWwrite (dst, magic, 2, 1);
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426 SDL_WriteLE32 (dst, bfSize);
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427 SDL_WriteLE16 (dst, bfReserved1);
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428 SDL_WriteLE16 (dst, bfReserved2);
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429 SDL_WriteLE32 (dst, bfOffBits);
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430
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431 /* Set the BMP info values */
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432 biSize = 40;
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433 biWidth = surface->w;
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434 biHeight = surface->h;
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435 biPlanes = 1;
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diff changeset
436 biBitCount = surface->format->BitsPerPixel;
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diff changeset
437 biCompression = BI_RGB;
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438 biSizeImage = surface->h * surface->pitch;
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diff changeset
439 biXPelsPerMeter = 0;
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440 biYPelsPerMeter = 0;
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diff changeset
441 if (surface->format->palette) {
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diff changeset
442 biClrUsed = surface->format->palette->ncolors;
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diff changeset
443 } else {
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diff changeset
444 biClrUsed = 0;
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diff changeset
445 }
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diff changeset
446 biClrImportant = 0;
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diff changeset
447
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448 /* Write the BMP info values */
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449 SDL_WriteLE32 (dst, biSize);
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450 SDL_WriteLE32 (dst, biWidth);
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451 SDL_WriteLE32 (dst, biHeight);
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diff changeset
452 SDL_WriteLE16 (dst, biPlanes);
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diff changeset
453 SDL_WriteLE16 (dst, biBitCount);
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diff changeset
454 SDL_WriteLE32 (dst, biCompression);
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diff changeset
455 SDL_WriteLE32 (dst, biSizeImage);
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456 SDL_WriteLE32 (dst, biXPelsPerMeter);
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diff changeset
457 SDL_WriteLE32 (dst, biYPelsPerMeter);
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diff changeset
458 SDL_WriteLE32 (dst, biClrUsed);
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diff changeset
459 SDL_WriteLE32 (dst, biClrImportant);
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diff changeset
460
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diff changeset
461 /* Write the palette (in BGR color order) */
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diff changeset
462 if (surface->format->palette) {
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diff changeset
463 SDL_Color *colors;
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diff changeset
464 int ncolors;
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diff changeset
465
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diff changeset
466 colors = surface->format->palette->colors;
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diff changeset
467 ncolors = surface->format->palette->ncolors;
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diff changeset
468 for (i = 0; i < ncolors; ++i) {
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diff changeset
469 SDL_RWwrite (dst, &colors[i].b, 1, 1);
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
470 SDL_RWwrite (dst, &colors[i].g, 1, 1);
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diff changeset
471 SDL_RWwrite (dst, &colors[i].r, 1, 1);
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diff changeset
472 SDL_RWwrite (dst, &colors[i].unused, 1, 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: 1402
diff changeset
473 }
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
474 }
0
74212992fb08 Initial revision
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parents:
diff changeset
475
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diff changeset
476 /* Write the bitmap offset */
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Sam Lantinga <slouken@libsdl.org>
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diff changeset
477 bfOffBits = SDL_RWtell (dst) - fp_offset;
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
478 if (SDL_RWseek (dst, fp_offset + 10, RW_SEEK_SET) < 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
479 SDL_Error (SDL_EFSEEK);
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
480 }
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481 SDL_WriteLE32 (dst, bfOffBits);
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482 if (SDL_RWseek (dst, fp_offset + bfOffBits, RW_SEEK_SET) < 0) {
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483 SDL_Error (SDL_EFSEEK);
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484 }
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485
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486 /* Write the bitmap image upside down */
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487 bits = (Uint8 *) surface->pixels + (surface->h * surface->pitch);
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488 pad = ((bw % 4) ? (4 - (bw % 4)) : 0);
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489 while (bits > (Uint8 *) surface->pixels) {
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490 bits -= surface->pitch;
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491 if (SDL_RWwrite (dst, bits, 1, bw) != bw) {
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492 SDL_Error (SDL_EFWRITE);
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493 break;
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494 }
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495 if (pad) {
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496 const Uint8 padbyte = 0;
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497 for (i = 0; i < pad; ++i) {
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498 SDL_RWwrite (dst, &padbyte, 1, 1);
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499 }
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500 }
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501 }
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502
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503 /* Write the BMP file size */
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504 bfSize = SDL_RWtell (dst) - fp_offset;
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505 if (SDL_RWseek (dst, fp_offset + 2, RW_SEEK_SET) < 0) {
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506 SDL_Error (SDL_EFSEEK);
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507 }
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508 SDL_WriteLE32 (dst, bfSize);
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509 if (SDL_RWseek (dst, fp_offset + bfSize, RW_SEEK_SET) < 0) {
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510 SDL_Error (SDL_EFSEEK);
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511 }
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512
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513 /* Close it up.. */
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514 SDL_UnlockSurface (surface);
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515 if (surface != saveme) {
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516 SDL_FreeSurface (surface);
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517 }
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518 }
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519
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520 if (freedst && dst) {
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521 SDL_RWclose (dst);
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522 }
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523 return ((SDL_strcmp (SDL_GetError (), "") == 0) ? 0 : -1);
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524 }
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525
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526 /* vi: set ts=4 sw=4 expandtab: */