annotate src/video/SDL_blit.c @ 1348:40d0975c1769

Date: Mon, 6 Feb 2006 11:41:04 -0500 From: "mystml@adinet.com.uy" Subject: [SDL] ALT-F4 using DirectX My game isn't getting SDL_QUIT when I press ALT-F4 using the DirectX driver; it does get SDL_QUIT when I press the red X in the window. I tracked this down to DX5_HandleMessage() in SDL_dx5events.c; WM_SYSKEYDOWN is being trapped and ignored which causes Windows not to post a WM_CLOSE, hence no SDL_QUIT is being generated. The relevant code is this : /* The keyboard is handled via DirectInput */ case WM_SYSKEYUP: case WM_SYSKEYDOWN: case WM_KEYUP: case WM_KEYDOWN: { /* Ignore windows keyboard messages */; } return(0); If I comment the WM_SYSKEYDOWN case, it falls through DefWindowProc() and ALT-F4 starts working again. I'm not sure about the best way to fix this. One option is handling ALT-F4 as a particular case somehow, but doesn't sound good. Another option would be to handle WM_SYSKEYDOWN separately and breaking instead of returning 0, so processing falls through and goes to DefWindowProc which does The Right Thing (TM). This seems to be the minimal change that makes ALT-F4 work and normal keyboard input continues to work. Does this sound reasonable? Am I overlooking anything? Do I submit a patch? --Gabriel
author Sam Lantinga <slouken@libsdl.org>
date Wed, 08 Feb 2006 17:19:43 +0000
parents 450721ad5436
children c71e05b4dc2e
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
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23 #include "SDL_error.h"
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24 #include "SDL_video.h"
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25 #include "SDL_string.h"
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26 #include "SDL_sysvideo.h"
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27 #include "SDL_blit.h"
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28 #include "SDL_RLEaccel_c.h"
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29 #include "SDL_pixels_c.h"
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30
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31 #if (defined(i386) || defined(__x86_64__)) && defined(__GNUC__) && defined(USE_ASMBLIT)
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32 #define MMX_ASMBLIT
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33 #endif
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34
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35 #if defined(MMX_ASMBLIT)
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36 #include "SDL_cpuinfo.h"
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37 #include "mmx.h"
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38 #endif
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39
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40 /* The general purpose software blit routine */
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41 static int SDL_SoftBlit(SDL_Surface *src, SDL_Rect *srcrect,
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42 SDL_Surface *dst, SDL_Rect *dstrect)
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43 {
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44 int okay;
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45 int src_locked;
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46 int dst_locked;
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47
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48 /* Everything is okay at the beginning... */
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49 okay = 1;
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50
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51 /* Lock the destination if it's in hardware */
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52 dst_locked = 0;
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53 if ( SDL_MUSTLOCK(dst) ) {
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54 if ( SDL_LockSurface(dst) < 0 ) {
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55 okay = 0;
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56 } else {
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57 dst_locked = 1;
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58 }
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59 }
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60 /* Lock the source if it's in hardware */
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61 src_locked = 0;
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62 if ( SDL_MUSTLOCK(src) ) {
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63 if ( SDL_LockSurface(src) < 0 ) {
0
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64 okay = 0;
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65 } else {
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66 src_locked = 1;
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67 }
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68 }
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69
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70 /* Set up source and destination buffer pointers, and BLIT! */
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71 if ( okay && srcrect->w && srcrect->h ) {
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72 SDL_BlitInfo info;
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73 SDL_loblit RunBlit;
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74
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75 /* Set up the blit information */
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76 info.s_pixels = (Uint8 *)src->pixels +
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77 (Uint16)srcrect->y*src->pitch +
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78 (Uint16)srcrect->x*src->format->BytesPerPixel;
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79 info.s_width = srcrect->w;
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80 info.s_height = srcrect->h;
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81 info.s_skip=src->pitch-info.s_width*src->format->BytesPerPixel;
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82 info.d_pixels = (Uint8 *)dst->pixels +
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83 (Uint16)dstrect->y*dst->pitch +
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84 (Uint16)dstrect->x*dst->format->BytesPerPixel;
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85 info.d_width = dstrect->w;
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86 info.d_height = dstrect->h;
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87 info.d_skip=dst->pitch-info.d_width*dst->format->BytesPerPixel;
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88 info.aux_data = src->map->sw_data->aux_data;
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89 info.src = src->format;
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90 info.table = src->map->table;
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91 info.dst = dst->format;
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92 RunBlit = src->map->sw_data->blit;
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93
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94 /* Run the actual software blit */
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95 RunBlit(&info);
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96 }
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97
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98 /* We need to unlock the surfaces if they're locked */
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99 if ( dst_locked ) {
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100 SDL_UnlockSurface(dst);
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101 }
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102 if ( src_locked ) {
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103 SDL_UnlockSurface(src);
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104 }
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105 /* Blit is done! */
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106 return(okay ? 0 : -1);
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107 }
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108
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109 #ifdef MMX_ASMBLIT
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110 static __inline__ void SDL_memcpyMMX(Uint8 *to, const Uint8 *from, int len)
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111 {
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112 int i;
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113
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114 for(i=0; i<len/8; i++) {
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115 __asm__ __volatile__ (
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116 " movq (%0), %%mm0\n"
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117 " movq %%mm0, (%1)\n"
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118 : : "r" (from), "r" (to) : "memory");
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119 from+=8;
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120 to+=8;
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121 }
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122 if (len&7)
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123 SDL_memcpy(to, from, len&7);
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124 }
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125
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126 static __inline__ void SDL_memcpySSE(Uint8 *to, const Uint8 *from, int len)
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127 {
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128 int i;
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129
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130 __asm__ __volatile__ (
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131 " prefetchnta (%0)\n"
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132 " prefetchnta 64(%0)\n"
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133 " prefetchnta 128(%0)\n"
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134 " prefetchnta 192(%0)\n"
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135 : : "r" (from) );
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136
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137 for(i=0; i<len/8; i++) {
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138 __asm__ __volatile__ (
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139 " prefetchnta 256(%0)\n"
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140 " movq (%0), %%mm0\n"
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141 " movntq %%mm0, (%1)\n"
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142 : : "r" (from), "r" (to) : "memory");
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143 from+=8;
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Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
144 to+=8;
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
145 }
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
146 if (len&7)
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
147 SDL_memcpy(to, from, len&7);
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
148 }
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
149 #endif
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
150
0
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parents:
diff changeset
151 static void SDL_BlitCopy(SDL_BlitInfo *info)
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parents:
diff changeset
152 {
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
153 Uint8 *src, *dst;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
154 int w, h;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
155 int srcskip, dstskip;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
156
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parents:
diff changeset
157 w = info->d_width*info->dst->BytesPerPixel;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
158 h = info->d_height;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
159 src = info->s_pixels;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
160 dst = info->d_pixels;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
161 srcskip = w+info->s_skip;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
162 dstskip = w+info->d_skip;
880
9ef41050100c Date: Tue, 30 Mar 2004 21:26:47 -0600
Sam Lantinga <slouken@libsdl.org>
parents: 769
diff changeset
163 #ifdef MMX_ASMBLIT
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents: 697
diff changeset
164 if(SDL_HasSSE())
689
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
165 {
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
166 while ( h-- ) {
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
167 SDL_memcpySSE(dst, src, w);
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
168 src += srcskip;
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
169 dst += dstskip;
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
170 }
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
171 __asm__ __volatile__ (
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
172 " emms\n"
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
173 ::);
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
174 }
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
175 else
739
22dbf364c017 Added SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE() in SDL_cpuinfo.h
Sam Lantinga <slouken@libsdl.org>
parents: 697
diff changeset
176 if(SDL_HasMMX())
689
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
177 {
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
178 while ( h-- ) {
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Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
179 SDL_memcpyMMX(dst, src, w);
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Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
180 src += srcskip;
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Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
181 dst += dstskip;
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Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
182 }
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Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
183 __asm__ __volatile__ (
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
184 " emms\n"
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
185 ::);
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
186 }
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
187 else
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
Sam Lantinga <slouken@libsdl.org>
parents: 526
diff changeset
188 #endif
0
74212992fb08 Initial revision
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parents:
diff changeset
189 while ( h-- ) {
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parents:
diff changeset
190 SDL_memcpy(dst, src, w);
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parents:
diff changeset
191 src += srcskip;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
192 dst += dstskip;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
193 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
194 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
195
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parents:
diff changeset
196 static void SDL_BlitCopyOverlap(SDL_BlitInfo *info)
74212992fb08 Initial revision
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parents:
diff changeset
197 {
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parents:
diff changeset
198 Uint8 *src, *dst;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
199 int w, h;
74212992fb08 Initial revision
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parents:
diff changeset
200 int srcskip, dstskip;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
201
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
202 w = info->d_width*info->dst->BytesPerPixel;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
203 h = info->d_height;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
204 src = info->s_pixels;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
205 dst = info->d_pixels;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
206 srcskip = w+info->s_skip;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
207 dstskip = w+info->d_skip;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
208 if ( dst < src ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
209 while ( h-- ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
210 SDL_memcpy(dst, src, w);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
211 src += srcskip;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
212 dst += dstskip;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
213 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
214 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
215 src += ((h-1) * srcskip);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
216 dst += ((h-1) * dstskip);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
217 while ( h-- ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
218 SDL_revcpy(dst, src, w);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
219 src -= srcskip;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
220 dst -= dstskip;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
221 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
222 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
223 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
224
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
225 /* Figure out which of many blit routines to set up on a surface */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
226 int SDL_CalculateBlit(SDL_Surface *surface)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
227 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
228 int blit_index;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
229
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
230 /* Clean everything out to start */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
231 if ( (surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
232 SDL_UnRLESurface(surface, 1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
233 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
234 surface->map->sw_blit = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
235
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
236 /* Figure out if an accelerated hardware blit is possible */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
237 surface->flags &= ~SDL_HWACCEL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
238 if ( surface->map->identity ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
239 int hw_blit_ok;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
240
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
241 if ( (surface->flags & SDL_HWSURFACE) == SDL_HWSURFACE ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
242 /* We only support accelerated blitting to hardware */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
243 if ( surface->map->dst->flags & SDL_HWSURFACE ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
244 hw_blit_ok = current_video->info.blit_hw;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
245 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
246 hw_blit_ok = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
247 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
248 if (hw_blit_ok && (surface->flags & SDL_SRCCOLORKEY)) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
249 hw_blit_ok = current_video->info.blit_hw_CC;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
250 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
251 if ( hw_blit_ok && (surface->flags & SDL_SRCALPHA) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
252 hw_blit_ok = current_video->info.blit_hw_A;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
253 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
254 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
255 /* We only support accelerated blitting to hardware */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
256 if ( surface->map->dst->flags & SDL_HWSURFACE ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
257 hw_blit_ok = current_video->info.blit_sw;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
258 } else {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
259 hw_blit_ok = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
260 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
261 if (hw_blit_ok && (surface->flags & SDL_SRCCOLORKEY)) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
262 hw_blit_ok = current_video->info.blit_sw_CC;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
263 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
264 if ( hw_blit_ok && (surface->flags & SDL_SRCALPHA) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
265 hw_blit_ok = current_video->info.blit_sw_A;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
266 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
267 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
268 if ( hw_blit_ok ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
269 SDL_VideoDevice *video = current_video;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
270 SDL_VideoDevice *this = current_video;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
271 video->CheckHWBlit(this, surface, surface->map->dst);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
272 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
273 }
1052
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
parents: 882
diff changeset
274
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
parents: 882
diff changeset
275 /* if an alpha pixel format is specified, we can accelerate alpha blits */
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
parents: 882
diff changeset
276 if (((surface->flags & SDL_HWSURFACE) == SDL_HWSURFACE )&&(current_video->displayformatalphapixel))
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
parents: 882
diff changeset
277 {
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
parents: 882
diff changeset
278 if ( (surface->flags & SDL_SRCALPHA) )
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
parents: 882
diff changeset
279 if ( current_video->info.blit_hw_A ) {
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
parents: 882
diff changeset
280 SDL_VideoDevice *video = current_video;
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
parents: 882
diff changeset
281 SDL_VideoDevice *this = current_video;
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
parents: 882
diff changeset
282 video->CheckHWBlit(this, surface, surface->map->dst);
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
parents: 882
diff changeset
283 }
68f607298ca9 Some work on using accelerated alpha blits with hardware surfaces.
Ryan C. Gordon <icculus@icculus.org>
parents: 882
diff changeset
284 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
285
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
286 /* Get the blit function index, based on surface mode */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
287 /* { 0 = nothing, 1 = colorkey, 2 = alpha, 3 = colorkey+alpha } */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
288 blit_index = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
289 blit_index |= (!!(surface->flags & SDL_SRCCOLORKEY)) << 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
290 if ( surface->flags & SDL_SRCALPHA
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
291 && (surface->format->alpha != SDL_ALPHA_OPAQUE
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
292 || surface->format->Amask) ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
293 blit_index |= 2;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
294 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
295
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
296 /* Check for special "identity" case -- copy blit */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
297 if ( surface->map->identity && blit_index == 0 ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
298 surface->map->sw_data->blit = SDL_BlitCopy;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
299
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
300 /* Handle overlapping blits on the same surface */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
301 if ( surface == surface->map->dst ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
302 surface->map->sw_data->blit = SDL_BlitCopyOverlap;
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303 }
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304 } else {
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305 if ( surface->format->BitsPerPixel < 8 ) {
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306 surface->map->sw_data->blit =
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307 SDL_CalculateBlit0(surface, blit_index);
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308 } else {
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309 switch ( surface->format->BytesPerPixel ) {
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310 case 1:
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311 surface->map->sw_data->blit =
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312 SDL_CalculateBlit1(surface, blit_index);
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313 break;
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314 case 2:
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315 case 3:
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316 case 4:
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317 surface->map->sw_data->blit =
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318 SDL_CalculateBlitN(surface, blit_index);
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319 break;
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320 default:
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321 surface->map->sw_data->blit = NULL;
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322 break;
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323 }
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324 }
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325 }
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326 /* Make sure we have a blit function */
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327 if ( surface->map->sw_data->blit == NULL ) {
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328 SDL_InvalidateMap(surface->map);
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329 SDL_SetError("Blit combination not supported");
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330 return(-1);
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331 }
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332
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333 /* Choose software blitting function */
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334 if(surface->flags & SDL_RLEACCELOK
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335 && (surface->flags & SDL_HWACCEL) != SDL_HWACCEL) {
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336
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337 if(surface->map->identity
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338 && (blit_index == 1
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339 || (blit_index == 3 && !surface->format->Amask))) {
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340 if ( SDL_RLESurface(surface) == 0 )
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341 surface->map->sw_blit = SDL_RLEBlit;
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342 } else if(blit_index == 2 && surface->format->Amask) {
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343 if ( SDL_RLESurface(surface) == 0 )
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344 surface->map->sw_blit = SDL_RLEAlphaBlit;
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345 }
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346 }
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347
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348 if ( surface->map->sw_blit == NULL ) {
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349 surface->map->sw_blit = SDL_SoftBlit;
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350 }
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351 return(0);
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352 }
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353