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comparison src/video/sdlgenblit.pl @ 1989:5b5f5de5433f

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Optimized the copy blitters a little bit
author Sam Lantinga <slouken@libsdl.org>
date Mon, 28 Aug 2006 14:10:46 +0000
parents 8055185ae4ed
children 7387e0514595
comparison
equal deleted inserted replaced
1988:1ee02169bbb0 1989:5b5f5de5433f
123 sub output_copydefs 123 sub output_copydefs
124 { 124 {
125 print FILE <<__EOF__; 125 print FILE <<__EOF__;
126 #define SDL_RENDERCOPY_MODULATE_COLOR 0x0001 126 #define SDL_RENDERCOPY_MODULATE_COLOR 0x0001
127 #define SDL_RENDERCOPY_MODULATE_ALPHA 0x0002 127 #define SDL_RENDERCOPY_MODULATE_ALPHA 0x0002
128 #define SDL_RENDERCOPY_BLEND 0x0010 128 #define SDL_RENDERCOPY_MASK 0x0010
129 #define SDL_RENDERCOPY_ADD 0x0020 129 #define SDL_RENDERCOPY_BLEND 0x0020
130 #define SDL_RENDERCOPY_MOD 0x0040 130 #define SDL_RENDERCOPY_ADD 0x0040
131 #define SDL_RENDERCOPY_MOD 0x0080
131 #define SDL_RENDERCOPY_NEAREST 0x0100 132 #define SDL_RENDERCOPY_NEAREST 0x0100
132 133
133 typedef struct { 134 typedef struct {
134 void *src; 135 void *src;
135 int src_w, src_h; 136 int src_w, src_h;
212 { 213 {
213 my $src = shift; 214 my $src = shift;
214 my $dst = shift; 215 my $dst = shift;
215 my $modulate = shift; 216 my $modulate = shift;
216 my $blend = shift; 217 my $blend = shift;
218 my $s = "";
219 my $d = "";
220
221 # Nice and easy...
222 if ( $src eq $dst && !$modulate && !$blend ) {
223 print FILE <<__EOF__;
224 *dst = *src;
225 __EOF__
226 return;
227 }
228
229 if ( $blend ) {
230 get_rgba("src", $src);
231 get_rgba("dst", $dst);
232 $s = "src";
233 $d = "dst";
234 } else {
235 get_rgba("", $src);
236 }
237
217 if ( $modulate ) { 238 if ( $modulate ) {
218 print FILE <<__EOF__; 239 print FILE <<__EOF__;
219 if (flags & SDL_RENDERCOPY_MODULATE_COLOR) { 240 if (flags & SDL_RENDERCOPY_MODULATE_COLOR) {
220 ${src}R = (${src}R * modulateR) / 255; 241 ${s}R = (${s}R * modulateR) / 255;
221 ${src}G = (${src}G * modulateG) / 255; 242 ${s}G = (${s}G * modulateG) / 255;
222 ${src}B = (${src}B * modulateB) / 255; 243 ${s}B = (${s}B * modulateB) / 255;
223 } 244 }
224 __EOF__
225 }
226 if ( $modulate && $blend ) {
227 print FILE <<__EOF__;
228 if (flags & SDL_RENDERCOPY_MODULATE_ALPHA) { 245 if (flags & SDL_RENDERCOPY_MODULATE_ALPHA) {
229 ${src}A = (${src}A * modulateA) / 255; 246 ${s}A = (${s}A * modulateA) / 255;
230 } 247 }
231 __EOF__ 248 __EOF__
232 } 249 }
233 if ( $blend ) { 250 if ( $blend ) {
234 print FILE <<__EOF__; 251 print FILE <<__EOF__;
235 if (flags & (SDL_RENDERCOPY_BLEND|SDL_RENDERCOPY_ADD)) { 252 if (flags & (SDL_RENDERCOPY_BLEND|SDL_RENDERCOPY_ADD)) {
236 /* This goes away if we ever use premultiplied alpha */ 253 /* This goes away if we ever use premultiplied alpha */
237 ${src}R = (${src}R * ${src}A) / 255; 254 if (${s}A < 255) {
238 ${src}G = (${src}G * ${src}A) / 255; 255 ${s}R = (${s}R * ${s}A) / 255;
239 ${src}B = (${src}B * ${src}A) / 255; 256 ${s}G = (${s}G * ${s}A) / 255;
240 } 257 ${s}B = (${s}B * ${s}A) / 255;
241 switch (flags & (SDL_RENDERCOPY_BLEND|SDL_RENDERCOPY_ADD|SDL_RENDERCOPY_MOD)) { 258 }
259 }
260 switch (flags & (SDL_RENDERCOPY_MASK|SDL_RENDERCOPY_BLEND|SDL_RENDERCOPY_ADD|SDL_RENDERCOPY_MOD)) {
261 case SDL_RENDERCOPY_MASK:
262 if (${s}A) {
263 ${d}R = ${s}R;
264 ${d}G = ${s}G;
265 ${d}B = ${s}B;
266 }
267 break;
242 case SDL_RENDERCOPY_BLEND: 268 case SDL_RENDERCOPY_BLEND:
243 ${dst}R = ${src}R + ((255 - ${src}A) * ${dst}R) / 255; 269 ${d}R = ${s}R + ((255 - ${s}A) * ${d}R) / 255;
244 ${dst}G = ${src}G + ((255 - ${src}A) * ${dst}G) / 255; 270 ${d}G = ${s}G + ((255 - ${s}A) * ${d}G) / 255;
245 ${dst}B = ${src}B + ((255 - ${src}A) * ${dst}B) / 255; 271 ${d}B = ${s}B + ((255 - ${s}A) * ${d}B) / 255;
246 break; 272 break;
247 case SDL_RENDERCOPY_ADD: 273 case SDL_RENDERCOPY_ADD:
248 ${dst}R = ${src}R + ${dst}R; if (${dst}R > 255) ${dst}R = 255; 274 ${d}R = ${s}R + ${d}R; if (${d}R > 255) ${d}R = 255;
249 ${dst}G = ${src}G + ${dst}G; if (${dst}G > 255) ${dst}G = 255; 275 ${d}G = ${s}G + ${d}G; if (${d}G > 255) ${d}G = 255;
250 ${dst}B = ${src}B + ${dst}B; if (${dst}B > 255) ${dst}B = 255; 276 ${d}B = ${s}B + ${d}B; if (${d}B > 255) ${d}B = 255;
251 break; 277 break;
252 case SDL_RENDERCOPY_MOD: 278 case SDL_RENDERCOPY_MOD:
253 ${dst}R = (${src}R * ${dst}R) / 255; 279 ${d}R = (${s}R * ${d}R) / 255;
254 ${dst}G = (${src}G * ${dst}G) / 255; 280 ${d}G = (${s}G * ${d}G) / 255;
255 ${dst}B = (${src}B * ${dst}B) / 255; 281 ${d}B = (${s}B * ${d}B) / 255;
256 break; 282 break;
257 } 283 }
258 __EOF__ 284 __EOF__
285 }
286 if ( $blend ) {
287 set_rgba("dst", $dst);
288 } else {
289 set_rgba("", $dst);
259 } 290 }
260 } 291 }
261 292
262 sub output_copyfunc 293 sub output_copyfunc
263 { 294 {
323 src = ($format_type{$src} *)(data->src + (srcy * data->src_pitch) + (srcx * $format_size{$src})); 354 src = ($format_type{$src} *)(data->src + (srcy * data->src_pitch) + (srcx * $format_size{$src}));
324 __EOF__ 355 __EOF__
325 print FILE <<__EOF__; 356 print FILE <<__EOF__;
326 } 357 }
327 __EOF__ 358 __EOF__
328 if ( $blend ) { 359 output_copycore($src, $dst, $modulate, $blend);
329 get_rgba("src", $src);
330 get_rgba("dst", $dst);
331 output_copycore("src", "dst", $modulate, $blend);
332 set_rgba("dst", $dst);
333 } elsif ( $modulate || $src ne $dst ) {
334 get_rgba("", $src);
335 output_copycore("", "", $modulate, $blend);
336 set_rgba("", $dst);
337 } else {
338 print FILE <<__EOF__;
339 *dst = *src;
340 __EOF__
341 }
342 print FILE <<__EOF__; 360 print FILE <<__EOF__;
343 posx += incx; 361 posx += incx;
344 ++dst; 362 ++dst;
345 } 363 }
346 posy += incy; 364 posy += incy;
354 $format_type{$src} *src = ($format_type{$src} *)data->src; 372 $format_type{$src} *src = ($format_type{$src} *)data->src;
355 $format_type{$dst} *dst = ($format_type{$dst} *)data->dst; 373 $format_type{$dst} *dst = ($format_type{$dst} *)data->dst;
356 int n = data->dst_w; 374 int n = data->dst_w;
357 while (n--) { 375 while (n--) {
358 __EOF__ 376 __EOF__
359 if ( $blend ) { 377 output_copycore($src, $dst, $modulate, $blend);
360 get_rgba("src", $src);
361 get_rgba("dst", $dst);
362 output_copycore("src", "dst", $modulate, $blend);
363 set_rgba("dst", $dst);
364 } elsif ( $modulate || $src ne $dst ) {
365 get_rgba("", $src);
366 output_copycore("", "", $modulate, $blend);
367 set_rgba("", $dst);
368 } else {
369 print FILE <<__EOF__;
370 *dst = *src;
371 __EOF__
372 }
373 print FILE <<__EOF__; 378 print FILE <<__EOF__;
374 ++src; 379 ++src;
375 ++dst; 380 ++dst;
376 } 381 }
377 data->src += data->src_pitch; 382 data->src += data->src_pitch;