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annotate src/video/SDL_blit.c @ 2265:265bb136af92

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More work in progress...
author Sam Lantinga <slouken@libsdl.org>
date Fri, 17 Aug 2007 06:58:20 +0000
parents 900c35d8e8fd
children e61ad15a205f
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 #include "SDL_video.h"
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25 #include "SDL_sysvideo.h"
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26 #include "SDL_blit.h"
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27 #include "SDL_blit_auto.h"
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28 #include "SDL_blit_copy.h"
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29 #include "SDL_RLEaccel_c.h"
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30 #include "SDL_pixels_c.h"
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31
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32 /* The general purpose software blit routine */
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33 static int
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34 SDL_SoftBlit(SDL_Surface * src, SDL_Rect * srcrect,
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35 SDL_Surface * dst, SDL_Rect * dstrect)
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36 {
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37 int okay;
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38 int src_locked;
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39 int dst_locked;
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40
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41 /* Everything is okay at the beginning... */
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42 okay = 1;
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43
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44 /* Lock the destination if it's in hardware */
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45 dst_locked = 0;
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46 if (SDL_MUSTLOCK(dst)) {
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47 if (SDL_LockSurface(dst) < 0) {
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48 okay = 0;
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49 } else {
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50 dst_locked = 1;
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51 }
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52 }
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53 /* Lock the source if it's in hardware */
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54 src_locked = 0;
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55 if (SDL_MUSTLOCK(src)) {
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56 if (SDL_LockSurface(src) < 0) {
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57 okay = 0;
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58 } else {
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59 src_locked = 1;
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60 }
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61 }
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62
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63 /* Set up source and destination buffer pointers, and BLIT! */
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64 if (okay && srcrect->w && srcrect->h) {
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65 SDL_BlitFunc RunBlit;
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66 SDL_BlitInfo *info = &src->map->info;
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67
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68 /* Set up the blit information */
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69 info->src = (Uint8 *) src->pixels +
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70 (Uint16) srcrect->y * src->pitch +
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71 (Uint16) srcrect->x * info->src_fmt->BytesPerPixel;
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72 info->src_w = srcrect->w;
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73 info->src_h = srcrect->h;
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74 info->dst = (Uint8 *) dst->pixels +
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75 (Uint16) dstrect->y * dst->pitch +
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76 (Uint16) dstrect->x * info->dst_fmt->BytesPerPixel;
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77 info->dst_w = dstrect->w;
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78 info->dst_h = dstrect->h;
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79 RunBlit = (SDL_BlitFunc) src->map->data;
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80
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81 /* Run the actual software blit */
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82 RunBlit(info);
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83 }
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84
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85 /* We need to unlock the surfaces if they're locked */
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86 if (dst_locked) {
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87 SDL_UnlockSurface(dst);
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88 }
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89 if (src_locked) {
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90 SDL_UnlockSurface(src);
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91 }
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92 /* Blit is done! */
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93 return (okay ? 0 : -1);
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94 }
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95
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96 #ifdef __MACOSX__
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97 #include <sys/sysctl.h>
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98
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99 static SDL_bool
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100 SDL_UseAltivecPrefetch()
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101 {
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102 const char key[] = "hw.l3cachesize";
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103 u_int64_t result = 0;
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104 size_t typeSize = sizeof(result);
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105
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106 if (sysctlbyname(key, &result, &typeSize, NULL, 0) == 0 && result > 0) {
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107 return SDL_TRUE;
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108 } else {
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109 return SDL_FALSE;
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110 }
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111 }
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112 #else
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113 static SDL_bool
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114 SDL_UseAltivecPrefetch()
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115 {
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116 /* Just guess G4 */
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117 return SDL_TRUE;
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118 }
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119 #endif /* __MACOSX__ */
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120
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121 static SDL_BlitFunc
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122 SDL_ChooseBlitFunc(Uint32 src_format, Uint32 dst_format, int flags, SDL_BlitFuncEntry * entries)
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123 {
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124 int i, flagcheck;
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125 static Uint32 features = 0xffffffff;
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126
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127 /* Get the available CPU features */
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128 if (features == 0xffffffff) {
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129 const char *override = SDL_getenv("SDL_BLIT_CPU_FEATURES");
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130
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131 features = SDL_CPU_ANY;
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132
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133 /* Allow an override for testing .. */
2247
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
134 if (override) {
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
135 SDL_sscanf(override, "%u", &features);
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
136 } else {
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
137 if (SDL_HasMMX()) {
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
138 features |= SDL_CPU_MMX;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
139 }
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
140 if (SDL_Has3DNow()) {
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
141 features |= SDL_CPU_3DNOW;
2247
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
142 }
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
143 if (SDL_HasSSE()) {
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
144 features |= SDL_CPU_SSE;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
145 }
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
146 if (SDL_HasSSE2()) {
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
147 features |= SDL_CPU_SSE2;
2247
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
148 }
2250
e1d228456537 Fixed a few compiler warnings.
Sam Lantinga <slouken@libsdl.org>
parents: 2249
diff changeset
149 if (SDL_HasAltiVec()) {
2247
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
150 if (SDL_UseAltivecPrefetch()) {
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
151 features |= SDL_CPU_ALTIVEC_PREFETCH;
2247
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
152 } else {
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
153 features |= SDL_CPU_ALTIVEC_NOPREFETCH;
2247
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
154 }
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
155 }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
156 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
157 }
2247
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
158
2263
900c35d8e8fd More work in progress, still doesn't compile...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
159 for (i = 0; entries[i].func; ++i) {
2265
265bb136af92 More work in progress...
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parents: 2263
diff changeset
160 /* Check for matching pixel formats */
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
161 if (src_format != entries[i].src_format) {
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
162 continue;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
163 }
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
164 if (dst_format != entries[i].dst_format) {
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
165 continue;
2247
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
166 }
2265
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
167
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
168 /* Check modulation flags */
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
169 flagcheck = (flags & (SDL_COPY_MODULATE_COLOR|SDL_COPY_MODULATE_COLOR));
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
170 if ((flagcheck & entries[i].flags) != flagcheck) {
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
171 continue;
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
172 }
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
173
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
174 /* Check blend flags */
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
175 flagcheck = (flags & (SDL_COPY_MASK|SDL_COPY_BLEND|SDL_COPY_ADD|SDL_COPY_MOD));
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
176 if ((flagcheck & entries[i].flags) != flagcheck) {
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
177 continue;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
178 }
2265
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
179
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
180 /* Check colorkey flag */
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
181 flagcheck = (flags & SDL_COPY_COLORKEY);
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
182 if ((flagcheck & entries[i].flags) != flagcheck) {
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
183 continue;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
184 }
2265
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
185
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
186 /* Check scaling flags */
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
187 flagcheck = (flags & SDL_COPY_NEAREST);
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
188 if ((flagcheck & entries[i].flags) != flagcheck) {
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
189 continue;
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
190 }
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
191
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
192 /* Check CPU features */
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
193 flagcheck = entries[i].cpu;
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
194 if ((flagcheck & features) != flagcheck) {
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
195 continue;
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
196 }
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
197
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
198 /* We found the best one! */
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
199 return entries[i].func;
2247
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
200 }
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
201 return NULL;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
202 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
203
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
204 /* Figure out which of many blit routines to set up on a surface */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
205 int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
206 SDL_CalculateBlit(SDL_Surface * surface)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
207 {
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
208 SDL_BlitFunc blit = NULL;
2263
900c35d8e8fd More work in progress, still doesn't compile...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
209 SDL_Surface *dst = surface->map->dst;
900c35d8e8fd More work in progress, still doesn't compile...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
210 Uint32 src_format;
900c35d8e8fd More work in progress, still doesn't compile...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
211 Uint32 dst_format;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
212
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
213 /* Clean everything out to start */
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
214 if ((surface->flags & SDL_RLEACCEL) == SDL_RLEACCEL) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
215 SDL_UnRLESurface(surface, 1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
216 }
2257
340942cfda48 Moved the colorkey and per-surface alpha into the blit info,
Sam Lantinga <slouken@libsdl.org>
parents: 2255
diff changeset
217 surface->map->blit = NULL;
2263
900c35d8e8fd More work in progress, still doesn't compile...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
218 surface->map->info.src_fmt = surface->format;
900c35d8e8fd More work in progress, still doesn't compile...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
219 surface->map->info.src_pitch = surface->pitch;
900c35d8e8fd More work in progress, still doesn't compile...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
220 surface->map->info.dst_fmt = dst->format;
900c35d8e8fd More work in progress, still doesn't compile...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
221 surface->map->info.dst_pitch = dst->pitch;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
222
2263
900c35d8e8fd More work in progress, still doesn't compile...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
223 src_format = SDL_MasksToPixelFormatEnum(surface->format->BitsPerPixel, surface->format->Rmask, surface->format->Gmask, surface->format->Bmask, surface->format->Amask);
900c35d8e8fd More work in progress, still doesn't compile...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
224 dst_format = SDL_MasksToPixelFormatEnum(dst->format->BitsPerPixel, dst->format->Rmask, dst->format->Gmask, dst->format->Bmask, dst->format->Amask);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
225
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
226 /* Check for special "identity" case -- copy blit */
2263
900c35d8e8fd More work in progress, still doesn't compile...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
227 if (surface->map->identity && !surface->map->info.flags) {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
228 /* Handle overlapping blits on the same surface */
2263
900c35d8e8fd More work in progress, still doesn't compile...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
229 if (surface == dst) {
2257
340942cfda48 Moved the colorkey and per-surface alpha into the blit info,
Sam Lantinga <slouken@libsdl.org>
parents: 2255
diff changeset
230 blit = SDL_BlitCopyOverlap;
2247
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
231 } else {
2257
340942cfda48 Moved the colorkey and per-surface alpha into the blit info,
Sam Lantinga <slouken@libsdl.org>
parents: 2255
diff changeset
232 blit = SDL_BlitCopy;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
233 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
234 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
235 if (surface->format->BitsPerPixel < 8) {
2263
900c35d8e8fd More work in progress, still doesn't compile...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
236 blit = SDL_ChooseBlitFunc(src_format, dst_format, surface->map->info.flags, SDL_BlitFuncTable0);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
237 } else {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
238 switch (surface->format->BytesPerPixel) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
239 case 1:
2263
900c35d8e8fd More work in progress, still doesn't compile...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
240 blit = SDL_ChooseBlitFunc(src_format, dst_format, surface->map->info.flags, SDL_BlitFuncTable1);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
241 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
242 case 2:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
243 case 3:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
244 case 4:
2263
900c35d8e8fd More work in progress, still doesn't compile...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
245 blit = SDL_ChooseBlitFunc(src_format, dst_format, surface->map->info.flags, SDL_BlitFuncTableN);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
246 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
247 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
248 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
249 }
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
250 if (blit == NULL) {
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
251 blit = SDL_ChooseBlitFunc(src_format, dst_format, surface->map->info.flags, SDL_GeneratedBlitFuncTable);
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
252 }
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
253
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
254 /* Make sure we have a blit function */
2257
340942cfda48 Moved the colorkey and per-surface alpha into the blit info,
Sam Lantinga <slouken@libsdl.org>
parents: 2255
diff changeset
255 if (blit == NULL) {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
256 SDL_InvalidateMap(surface->map);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
257 SDL_SetError("Blit combination not supported");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
258 return (-1);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
259 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
260
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
261 /* Choose software blitting function */
2265
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
262 if ((surface->flags & SDL_RLEACCELOK) && !(surface->map->flags & () {
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
263 if (surface->map->identity && (surface->map->flags & SDL_COPY_COLORKEY)
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
264 && (blit_index == 1
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
265 || (blit_index == 3 && !surface->format->Amask))) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
266 if (SDL_RLESurface(surface) == 0)
2257
340942cfda48 Moved the colorkey and per-surface alpha into the blit info,
Sam Lantinga <slouken@libsdl.org>
parents: 2255
diff changeset
267 surface->map->blit = SDL_RLEBlit;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
268 } else if (blit_index == 2 && surface->format->Amask) {
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269 if (SDL_RLESurface(surface) == 0)
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270 surface->map->blit = SDL_RLEAlphaBlit;
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271 }
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272 }
0
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273
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274 if (surface->map->blit == NULL) {
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275 surface->map->blit = SDL_SoftBlit;
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276 surface->map->data = blit;
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277 }
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278 return (0);
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279 }
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280
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281 /* vi: set ts=4 sw=4 expandtab: */