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annotate src/video/SDL_blit.c @ 3454:77366fae0094

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Adjust the vertices to be over the texel center.
author Sam Lantinga <slouken@libsdl.org>
date Thu, 19 Nov 2009 04:33:35 +0000
parents 99210400e8b9
children f7b03b6838cb
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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_blit_slow.h"
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30 #include "SDL_RLEaccel_c.h"
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31 #include "SDL_pixels_c.h"
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32
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33 /* The general purpose software blit routine */
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34 static int
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35 SDL_SoftBlit(SDL_Surface * src, SDL_Rect * srcrect,
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36 SDL_Surface * dst, SDL_Rect * dstrect)
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37 {
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38 int okay;
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39 int src_locked;
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40 int dst_locked;
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41
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42 /* Everything is okay at the beginning... */
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43 okay = 1;
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44
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45 /* Lock the destination if it's in hardware */
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46 dst_locked = 0;
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47 if (SDL_MUSTLOCK(dst)) {
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48 if (SDL_LockSurface(dst) < 0) {
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49 okay = 0;
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50 } else {
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51 dst_locked = 1;
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52 }
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53 }
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54 /* Lock the source if it's in hardware */
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55 src_locked = 0;
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56 if (SDL_MUSTLOCK(src)) {
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57 if (SDL_LockSurface(src) < 0) {
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58 okay = 0;
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59 } else {
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60 src_locked = 1;
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61 }
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62 }
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63
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64 /* Set up source and destination buffer pointers, and BLIT! */
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65 if (okay && srcrect->w && srcrect->h) {
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66 SDL_BlitFunc RunBlit;
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67 SDL_BlitInfo *info = &src->map->info;
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68
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69 /* Set up the blit information */
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70 info->src = (Uint8 *) src->pixels +
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71 (Uint16) srcrect->y * src->pitch +
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72 (Uint16) srcrect->x * info->src_fmt->BytesPerPixel;
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73 info->src_w = srcrect->w;
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74 info->src_h = srcrect->h;
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75 info->src_pitch = src->pitch;
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76 info->src_skip =
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77 info->src_pitch - info->src_w * info->src_fmt->BytesPerPixel;
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78 info->dst =
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79 (Uint8 *) dst->pixels + (Uint16) dstrect->y * dst->pitch +
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80 (Uint16) dstrect->x * info->dst_fmt->BytesPerPixel;
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81 info->dst_w = dstrect->w;
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82 info->dst_h = dstrect->h;
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83 info->dst_pitch = dst->pitch;
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84 info->dst_skip =
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85 info->dst_pitch - info->dst_w * info->dst_fmt->BytesPerPixel;
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86 RunBlit = (SDL_BlitFunc) src->map->data;
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87
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88 /* Run the actual software blit */
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89 RunBlit(info);
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90 }
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91
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92 /* We need to unlock the surfaces if they're locked */
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93 if (dst_locked) {
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94 SDL_UnlockSurface(dst);
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95 }
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96 if (src_locked) {
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97 SDL_UnlockSurface(src);
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98 }
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99 /* Blit is done! */
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100 return (okay ? 0 : -1);
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101 }
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102
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103 #ifdef __MACOSX__
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104 #include <sys/sysctl.h>
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105
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106 static SDL_bool
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107 SDL_UseAltivecPrefetch()
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108 {
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109 const char key[] = "hw.l3cachesize";
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110 u_int64_t result = 0;
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111 size_t typeSize = sizeof(result);
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112
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113 if (sysctlbyname(key, &result, &typeSize, NULL, 0) == 0 && result > 0) {
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114 return SDL_TRUE;
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115 } else {
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116 return SDL_FALSE;
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117 }
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118 }
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119 #else
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120 static SDL_bool
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121 SDL_UseAltivecPrefetch()
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122 {
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123 /* Just guess G4 */
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124 return SDL_TRUE;
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125 }
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126 #endif /* __MACOSX__ */
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127
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128 static SDL_BlitFunc
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129 SDL_ChooseBlitFunc(Uint32 src_format, Uint32 dst_format, int flags,
c785543d1843 Okay, still some bugs, but everything builds again...
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130 SDL_BlitFuncEntry * entries)
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131 {
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132 int i, flagcheck;
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diff changeset
133 static Uint32 features = 0xffffffff;
689
5bb080d35049 Date: Tue, 19 Aug 2003 17:57:00 +0200
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parents: 526
diff changeset
134
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135 /* Get the available CPU features */
2247
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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parents: 1895
diff changeset
136 if (features == 0xffffffff) {
2262
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diff changeset
137 const char *override = SDL_getenv("SDL_BLIT_CPU_FEATURES");
2250
e1d228456537 Fixed a few compiler warnings.
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parents: 2249
diff changeset
138
2262
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139 features = SDL_CPU_ANY;
0
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parents:
diff changeset
140
2250
e1d228456537 Fixed a few compiler warnings.
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parents: 2249
diff changeset
141 /* Allow an override for testing .. */
2247
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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parents: 1895
diff changeset
142 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
143 SDL_sscanf(override, "%u", &features);
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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parents: 1895
diff changeset
144 } else {
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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parents: 1895
diff changeset
145 if (SDL_HasMMX()) {
2262
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parents: 2260
diff changeset
146 features |= SDL_CPU_MMX;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
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parents: 2260
diff changeset
147 }
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
148 if (SDL_Has3DNow()) {
bee005ace1bf Work in progress: merging new texture features into SDL blit system
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parents: 2260
diff changeset
149 features |= SDL_CPU_3DNOW;
2247
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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parents: 1895
diff changeset
150 }
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
151 if (SDL_HasSSE()) {
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
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parents: 2260
diff changeset
152 features |= SDL_CPU_SSE;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
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parents: 2260
diff changeset
153 }
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
154 if (SDL_HasSSE2()) {
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
155 features |= SDL_CPU_SSE2;
2247
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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parents: 1895
diff changeset
156 }
2250
e1d228456537 Fixed a few compiler warnings.
Sam Lantinga <slouken@libsdl.org>
parents: 2249
diff changeset
157 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
158 if (SDL_UseAltivecPrefetch()) {
2262
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Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
159 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
160 } else {
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
161 features |= SDL_CPU_ALTIVEC_NOPREFETCH;
2247
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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parents: 1895
diff changeset
162 }
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
Sam Lantinga <slouken@libsdl.org>
parents: 1895
diff changeset
163 }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
164 }
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
165 }
2247
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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parents: 1895
diff changeset
166
2263
900c35d8e8fd More work in progress, still doesn't compile...
Sam Lantinga <slouken@libsdl.org>
parents: 2262
diff changeset
167 for (i = 0; entries[i].func; ++i) {
2265
265bb136af92 More work in progress...
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parents: 2263
diff changeset
168 /* Check for matching pixel formats */
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
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parents: 2260
diff changeset
169 if (src_format != entries[i].src_format) {
bee005ace1bf Work in progress: merging new texture features into SDL blit system
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parents: 2260
diff changeset
170 continue;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
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parents: 2260
diff changeset
171 }
bee005ace1bf Work in progress: merging new texture features into SDL blit system
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parents: 2260
diff changeset
172 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
173 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
174 }
2265
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parents: 2263
diff changeset
175
265bb136af92 More work in progress...
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parents: 2263
diff changeset
176 /* Check modulation flags */
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
177 flagcheck =
2837
ff8db79a3cc9 Fixed bug picking blitters
Sam Lantinga <slouken@libsdl.org>
parents: 2824
diff changeset
178 (flags & (SDL_COPY_MODULATE_COLOR | SDL_COPY_MODULATE_ALPHA));
2265
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parents: 2263
diff changeset
179 if ((flagcheck & entries[i].flags) != flagcheck) {
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
180 continue;
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
181 }
265bb136af92 More work in progress...
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parents: 2263
diff changeset
182
265bb136af92 More work in progress...
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parents: 2263
diff changeset
183 /* Check blend flags */
2267
c785543d1843 Okay, still some bugs, but everything builds again...
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parents: 2266
diff changeset
184 flagcheck =
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
185 (flags &
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
186 (SDL_COPY_MASK | SDL_COPY_BLEND | SDL_COPY_ADD | SDL_COPY_MOD));
2265
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parents: 2263
diff changeset
187 if ((flagcheck & entries[i].flags) != flagcheck) {
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
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parents: 2260
diff changeset
188 continue;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
189 }
2265
265bb136af92 More work in progress...
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parents: 2263
diff changeset
190
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
191 /* Check colorkey flag */
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
192 flagcheck = (flags & SDL_COPY_COLORKEY);
265bb136af92 More work in progress...
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parents: 2263
diff changeset
193 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
194 continue;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
195 }
2265
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 /* Check scaling flags */
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
198 flagcheck = (flags & SDL_COPY_NEAREST);
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
199 if ((flagcheck & entries[i].flags) != flagcheck) {
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
200 continue;
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
201 }
265bb136af92 More work in progress...
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parents: 2263
diff changeset
202
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
203 /* Check CPU features */
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
204 flagcheck = entries[i].cpu;
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
205 if ((flagcheck & features) != flagcheck) {
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
206 continue;
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
207 }
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
208
265bb136af92 More work in progress...
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parents: 2263
diff changeset
209 /* We found the best one! */
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
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parents: 2260
diff changeset
210 return entries[i].func;
2247
93994f65c74c Removed hermes since it's LGPL and not compatible with a commercial license.
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parents: 1895
diff changeset
211 }
2262
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parents: 2260
diff changeset
212 return NULL;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
213 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
214
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
215 /* 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.
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parents: 1402
diff changeset
216 int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
diff changeset
217 SDL_CalculateBlit(SDL_Surface * surface)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
218 {
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
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parents: 2260
diff changeset
219 SDL_BlitFunc blit = NULL;
2266
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
220 SDL_BlitMap *map = surface->map;
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
221 SDL_Surface *dst = map->dst;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
222
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
223 /* 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
224 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
225 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
226 }
2266
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
227 map->blit = SDL_SoftBlit;
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
228 map->info.src_fmt = surface->format;
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
229 map->info.src_pitch = surface->pitch;
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
230 map->info.dst_fmt = dst->format;
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
231 map->info.dst_pitch = dst->pitch;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
232
2266
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
233 /* See if we can do RLE acceleration */
2805
2ed5ff5373d8 Preserve the desire for RLE acceleration
Sam Lantinga <slouken@libsdl.org>
parents: 2801
diff changeset
234 if (map->info.flags & SDL_COPY_RLE_DESIRED) {
2266
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
235 if (SDL_RLESurface(surface) == 0) {
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
236 return 0;
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
237 }
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
238 }
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
239
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
240 /* Choose a standard blit function */
2801
5eb95b8adc1a Fixed copy blit detection
Sam Lantinga <slouken@libsdl.org>
parents: 2329
diff changeset
241 if (map->identity && !(map->info.flags & ~SDL_COPY_RLE_DESIRED)) {
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
242 /* 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
243 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
244 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
245 } else {
2257
340942cfda48 Moved the colorkey and per-surface alpha into the blit info,
Sam Lantinga <slouken@libsdl.org>
parents: 2255
diff changeset
246 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
247 }
2266
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
248 } else if (surface->format->BitsPerPixel < 8) {
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
249 blit = SDL_CalculateBlit0(surface);
2266
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
250 } else if (surface->format->BytesPerPixel == 1) {
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
251 blit = SDL_CalculateBlit1(surface);
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
252 } else if (map->info.flags & SDL_COPY_BLEND) {
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
253 blit = SDL_CalculateBlitA(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
254 } else {
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
255 blit = SDL_CalculateBlitN(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
256 }
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
257 if (blit == NULL) {
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
258 Uint32 src_format =
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
259 SDL_MasksToPixelFormatEnum(surface->format->BitsPerPixel,
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
260 surface->format->Rmask,
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
261 surface->format->Gmask,
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
262 surface->format->Bmask,
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
263 surface->format->Amask);
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
264 Uint32 dst_format =
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
265 SDL_MasksToPixelFormatEnum(dst->format->BitsPerPixel,
2329
c1a390f6a819 ran make indent
Bob Pendleton <bob@pendleton.com>
parents: 2328
diff changeset
266 dst->format->Rmask,
2328
91e601d9df8b re: bug#563. checking in some commented out trace code and a fix so that the in testalpha.c the background only flashes when alpha == 255. The problem that is being
Bob Pendleton <bob@pendleton.com>
parents: 2267
diff changeset
267 dst->format->Gmask,
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
268 dst->format->Bmask,
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
269 dst->format->Amask);
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
270
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
271 blit =
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272 SDL_ChooseBlitFunc(src_format, dst_format, map->info.flags,
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273 SDL_GeneratedBlitFuncTable);
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274 }
2824
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275 #ifndef TEST_SLOW_BLIT
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276 if (blit == NULL)
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277 #endif
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278 {
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279 if (surface->format->BytesPerPixel > 1
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280 && dst->format->BytesPerPixel > 1) {
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281 blit = SDL_Blit_Slow;
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282 }
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283 }
2267
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284 map->data = blit;
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285
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286 /* Make sure we have a blit function */
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287 if (blit == NULL) {
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288 SDL_InvalidateMap(map);
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289 SDL_SetError("Blit combination not supported");
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290 return (-1);
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291 }
0
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292
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293 return (0);
0
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294 }
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295
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296 /* vi: set ts=4 sw=4 expandtab: */