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annotate src/video/SDL_blit.c @ 5267:b530ef003506

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Happy 2011! :)
author Sam Lantinga <slouken@libsdl.org>
date Fri, 11 Feb 2011 22:37:15 -0800
parents 6a65c1fc07af
children
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2011 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
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104 static SDL_BlitFunc
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105 SDL_ChooseBlitFunc(Uint32 src_format, Uint32 dst_format, int flags,
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106 SDL_BlitFuncEntry * entries)
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107 {
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108 int i, flagcheck;
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109 static Uint32 features = 0xffffffff;
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110
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111 /* Get the available CPU features */
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112 if (features == 0xffffffff) {
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113 const char *override = SDL_getenv("SDL_BLIT_CPU_FEATURES");
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114
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115 features = SDL_CPU_ANY;
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116
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117 /* Allow an override for testing .. */
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118 if (override) {
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119 SDL_sscanf(override, "%u", &features);
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120 } else {
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121 if (SDL_HasMMX()) {
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122 features |= SDL_CPU_MMX;
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123 }
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124 if (SDL_HasSSE()) {
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125 features |= SDL_CPU_SSE;
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126 }
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127 if (SDL_HasSSE2()) {
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128 features |= SDL_CPU_SSE2;
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129 }
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130 }
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131 }
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132
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133 for (i = 0; entries[i].func; ++i) {
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parents: 2263
diff changeset
134 /* 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
135 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
136 continue;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
137 }
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
138 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
139 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
140 }
2265
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
141
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
142 /* Check modulation flags */
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
143 flagcheck =
2837
ff8db79a3cc9 Fixed bug picking blitters
Sam Lantinga <slouken@libsdl.org>
parents: 2824
diff changeset
144 (flags & (SDL_COPY_MODULATE_COLOR | SDL_COPY_MODULATE_ALPHA));
2265
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
145 if ((flagcheck & entries[i].flags) != flagcheck) {
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
146 continue;
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
147 }
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
148
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
149 /* Check blend flags */
5187
d976b67150c5 Restored SDL_BLENDMODE_MOD for MAME
Sam Lantinga <slouken@libsdl.org>
parents: 5143
diff changeset
150 flagcheck =
d976b67150c5 Restored SDL_BLENDMODE_MOD for MAME
Sam Lantinga <slouken@libsdl.org>
parents: 5143
diff changeset
151 (flags &
d976b67150c5 Restored SDL_BLENDMODE_MOD for MAME
Sam Lantinga <slouken@libsdl.org>
parents: 5143
diff changeset
152 (SDL_COPY_BLEND | SDL_COPY_ADD | SDL_COPY_MOD));
2265
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
153 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
154 continue;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
155 }
2265
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
156
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
157 /* Check colorkey flag */
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
158 flagcheck = (flags & SDL_COPY_COLORKEY);
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
159 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
160 continue;
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
161 }
2265
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
162
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
163 /* Check scaling flags */
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
164 flagcheck = (flags & SDL_COPY_NEAREST);
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
165 if ((flagcheck & entries[i].flags) != flagcheck) {
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
166 continue;
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
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
169 /* Check CPU features */
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
170 flagcheck = entries[i].cpu;
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
171 if ((flagcheck & features) != flagcheck) {
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
172 continue;
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
265bb136af92 More work in progress...
Sam Lantinga <slouken@libsdl.org>
parents: 2263
diff changeset
175 /* 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
176 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
177 }
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
178 return NULL;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
179 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
180
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
181 /* 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
182 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
183 SDL_CalculateBlit(SDL_Surface * surface)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
184 {
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
185 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
186 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
187 SDL_Surface *dst = map->dst;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
188
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
189 /* 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
190 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
191 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
192 }
2266
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
193 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
194 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
195 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
196 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
197 map->info.dst_pitch = dst->pitch;
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
198
2266
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
199 /* See if we can do RLE acceleration */
2805
2ed5ff5373d8 Preserve the desire for RLE acceleration
Sam Lantinga <slouken@libsdl.org>
parents: 2801
diff changeset
200 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
201 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
202 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
203 }
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
204 }
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
205
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
206 /* Choose a standard blit function */
2801
5eb95b8adc1a Fixed copy blit detection
Sam Lantinga <slouken@libsdl.org>
parents: 2329
diff changeset
207 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
208 /* 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
209 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
210 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
211 } else {
2257
340942cfda48 Moved the colorkey and per-surface alpha into the blit info,
Sam Lantinga <slouken@libsdl.org>
parents: 2255
diff changeset
212 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
213 }
2266
e61ad15a205f More work in progress integrating SDL_Surface and the new SDL_Texture API
Sam Lantinga <slouken@libsdl.org>
parents: 2265
diff changeset
214 } 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
215 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
216 } 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
217 blit = SDL_CalculateBlit1(surface);
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
218 } 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
219 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
220 } else {
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
221 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
222 }
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
223 if (blit == NULL) {
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
224 Uint32 src_format =
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
225 SDL_MasksToPixelFormatEnum(surface->format->BitsPerPixel,
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
226 surface->format->Rmask,
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
227 surface->format->Gmask,
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
228 surface->format->Bmask,
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
229 surface->format->Amask);
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
230 Uint32 dst_format =
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
231 SDL_MasksToPixelFormatEnum(dst->format->BitsPerPixel,
2329
c1a390f6a819 ran make indent
Bob Pendleton <bob@pendleton.com>
parents: 2328
diff changeset
232 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
233 dst->format->Gmask,
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
234 dst->format->Bmask,
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
235 dst->format->Amask);
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
236
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
237 blit =
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
238 SDL_ChooseBlitFunc(src_format, dst_format, map->info.flags,
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
239 SDL_GeneratedBlitFuncTable);
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
240 }
2824
4dba7aa7ea77 Added slow but complete blit fallback
Sam Lantinga <slouken@libsdl.org>
parents: 2805
diff changeset
241 #ifndef TEST_SLOW_BLIT
4dba7aa7ea77 Added slow but complete blit fallback
Sam Lantinga <slouken@libsdl.org>
parents: 2805
diff changeset
242 if (blit == NULL)
4dba7aa7ea77 Added slow but complete blit fallback
Sam Lantinga <slouken@libsdl.org>
parents: 2805
diff changeset
243 #endif
4dba7aa7ea77 Added slow but complete blit fallback
Sam Lantinga <slouken@libsdl.org>
parents: 2805
diff changeset
244 {
4dba7aa7ea77 Added slow but complete blit fallback
Sam Lantinga <slouken@libsdl.org>
parents: 2805
diff changeset
245 if (surface->format->BytesPerPixel > 1
4dba7aa7ea77 Added slow but complete blit fallback
Sam Lantinga <slouken@libsdl.org>
parents: 2805
diff changeset
246 && dst->format->BytesPerPixel > 1) {
4dba7aa7ea77 Added slow but complete blit fallback
Sam Lantinga <slouken@libsdl.org>
parents: 2805
diff changeset
247 blit = SDL_Blit_Slow;
4dba7aa7ea77 Added slow but complete blit fallback
Sam Lantinga <slouken@libsdl.org>
parents: 2805
diff changeset
248 }
4dba7aa7ea77 Added slow but complete blit fallback
Sam Lantinga <slouken@libsdl.org>
parents: 2805
diff changeset
249 }
2267
c785543d1843 Okay, still some bugs, but everything builds again...
Sam Lantinga <slouken@libsdl.org>
parents: 2266
diff changeset
250 map->data = blit;
2262
bee005ace1bf Work in progress: merging new texture features into SDL blit system
Sam Lantinga <slouken@libsdl.org>
parents: 2260
diff changeset
251
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
252 /* 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
253 if (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
254 SDL_InvalidateMap(map);
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
255 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
256 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
257 }
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
258
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
259 return (0);
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
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
262 /* vi: set ts=4 sw=4 expandtab: */