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comparison src/SDL_compat.c @ 1897:c2a27da60b18

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Solved the performance problems by introducing the concept of a single-buffered display, which is a fast path used for the whole-surface SDL 1.2 API. Solved the flicker problems by implementing a backbuffer in the GDI renderer. Unfortunately, now using the GDI renderer with a backbuffer and HBITMAPs is significantly slower than SDL's surface code. *sigh*
author Sam Lantinga <slouken@libsdl.org>
date Wed, 12 Jul 2006 06:39:26 +0000
parents c121d94672cb
children 06c27a737b7a
comparison
equal deleted inserted replaced
1896:4a74fa359e7e 1897:c2a27da60b18
440 SDL_PublicSurface = SDL_VideoSurface; 440 SDL_PublicSurface = SDL_VideoSurface;
441 return SDL_PublicSurface; 441 return SDL_PublicSurface;
442 } 442 }
443 443
444 /* Create a renderer for the window */ 444 /* Create a renderer for the window */
445 if (SDL_CreateRenderer(SDL_VideoWindow, -1, 0) < 0) { 445 if (SDL_CreateRenderer(SDL_VideoWindow, -1, SDL_Renderer_SingleBuffer) <
446 0) {
446 return NULL; 447 return NULL;
447 } 448 }
448 449
449 /* Create a texture for the screen surface */ 450 /* Create a texture for the screen surface */
450 SDL_VideoTexture = 451 SDL_VideoTexture =
515 SDL_PublicSurface = 516 SDL_PublicSurface =
516 (SDL_ShadowSurface ? SDL_ShadowSurface : SDL_VideoSurface); 517 (SDL_ShadowSurface ? SDL_ShadowSurface : SDL_VideoSurface);
517 518
518 /* Clear the surface for display */ 519 /* Clear the surface for display */
519 SDL_FillRect(SDL_PublicSurface, NULL, 0); 520 SDL_FillRect(SDL_PublicSurface, NULL, 0);
521 SDL_UpdateRect(SDL_PublicSurface, 0, 0, 0, 0);
520 522
521 /* We're finally done! */ 523 /* We're finally done! */
522 return SDL_PublicSurface; 524 return SDL_PublicSurface;
523 } 525 }
524 526
615 SDL_UpdateRect(SDL_Surface * screen, Sint32 x, Sint32 y, Uint32 w, Uint32 h) 617 SDL_UpdateRect(SDL_Surface * screen, Sint32 x, Sint32 y, Uint32 w, Uint32 h)
616 { 618 {
617 if (screen) { 619 if (screen) {
618 SDL_Rect rect; 620 SDL_Rect rect;
619 621
620 /* Perform some checking */
621 if (w == 0)
622 w = screen->w;
623 if (h == 0)
624 h = screen->h;
625 if ((int) (x + w) > screen->w)
626 return;
627 if ((int) (y + h) > screen->h)
628 return;
629
630 /* Fill the rectangle */ 622 /* Fill the rectangle */
631 rect.x = (Sint16) x; 623 rect.x = (int) x;
632 rect.y = (Sint16) y; 624 rect.y = (int) y;
633 rect.w = (Uint16) w; 625 rect.w = (int) (w ? w : screen->w);
634 rect.h = (Uint16) h; 626 rect.h = (int) (h ? h : screen->h);
635 SDL_UpdateRects(screen, 1, &rect); 627 SDL_UpdateRects(screen, 1, &rect);
636 } 628 }
637 } 629 }
638 void 630 void
639 SDL_UpdateRects(SDL_Surface * screen, int numrects, SDL_Rect * rects) 631 SDL_UpdateRects(SDL_Surface * screen, int numrects, SDL_Rect * rects)