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comparison src/video/x11/SDL_x11yuv.c @ 1642:f1211a4b7380

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Fixed bug #189 Clip the overlay destination rectangle to the screen area on X11
author Sam Lantinga <slouken@libsdl.org>
date Mon, 17 Apr 2006 05:38:33 +0000
parents 3ba88cb7eb1b
children 51038e80ae59
comparison
equal deleted inserted replaced
1641:5cf11b00b900 1642:f1211a4b7380
355 } 355 }
356 356
357 int X11_DisplayYUVOverlay(_THIS, SDL_Overlay *overlay, SDL_Rect *dstrect) 357 int X11_DisplayYUVOverlay(_THIS, SDL_Overlay *overlay, SDL_Rect *dstrect)
358 { 358 {
359 struct private_yuvhwdata *hwdata; 359 struct private_yuvhwdata *hwdata;
360 int srcx, srcy, srcw, srch;
361 int dstx, dsty, dstw, dsth;
360 362
361 hwdata = overlay->hwdata; 363 hwdata = overlay->hwdata;
364
365 /* Clip the rectangle to the screen area */
366 srcx = 0;
367 srcy = 0;
368 srcw = overlay->w;
369 srch = overlay->h;
370 dstx = dstrect->x;
371 dsty = dstrect->y;
372 dstw = dstrect->w;
373 dsth = dstrect->h;
374 if ( dstx < 0 ) {
375 srcw += (dstx * overlay->w) / dstrect->w;
376 dstw += dstx;
377 srcx -= (dstx * overlay->w) / dstrect->w;
378 dstx = 0;
379 }
380 if ( (dstx+dstw) > this->screen->w ) {
381 int extra = (dstx+dstw - this->screen->w);
382 srcw -= (extra * overlay->w) / dstrect->w;
383 dstw -= extra;
384 }
385 if ( dsty < 0 ) {
386 srch += (dsty * overlay->h) / dstrect->h;
387 dsth += dsty;
388 srcy -= (dsty * overlay->h) / dstrect->h;
389 dsty = 0;
390 }
391 if ( (dsty+dsth) > this->screen->h ) {
392 int extra = (dsty+dsth - this->screen->h);
393 srch -= (extra * overlay->h) / dstrect->h;
394 dsth -= extra;
395 }
396 if ( srcw <= 0 || srch <= 0 ||
397 srch <= 0 || dsth <= 0 ) {
398 return;
399 }
400
362 #ifndef NO_SHARED_MEMORY 401 #ifndef NO_SHARED_MEMORY
363 if ( hwdata->yuv_use_mitshm ) { 402 if ( hwdata->yuv_use_mitshm ) {
364 SDL_NAME(XvShmPutImage)(GFX_Display, hwdata->port, SDL_Window, SDL_GC, 403 SDL_NAME(XvShmPutImage)(GFX_Display, hwdata->port, SDL_Window, SDL_GC,
365 hwdata->image, 0, 0, overlay->w, overlay->h, 404 hwdata->image,
366 dstrect->x, dstrect->y, dstrect->w, dstrect->h, False); 405 srcx, srcy, srcw, srch, dstx, dsty, dstw, dsth, False);
367 } 406 }
368 else 407 else
369 #endif 408 #endif
370 { 409 {
371 SDL_NAME(XvPutImage)(GFX_Display, hwdata->port, SDL_Window, SDL_GC, 410 SDL_NAME(XvPutImage)(GFX_Display, hwdata->port, SDL_Window, SDL_GC,
372 hwdata->image, 0, 0, overlay->w, overlay->h, 411 hwdata->image,
373 dstrect->x, dstrect->y, dstrect->w, dstrect->h); 412 srcx, srcy, srcw, srch, dstx, dsty, dstw, dsth);
374 } 413 }
375 XSync(GFX_Display, False); 414 XSync(GFX_Display, False);
376 return(0); 415 return(0);
377 } 416 }
378 417