pandory500/SDL-mirror
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Solved the performance problems by introducing the concept of a single-buffered

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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*

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401942
This commit is contained in:
Sam Lantinga 2006-07-12 06:39:26 +00:00
parent 58d76aea10
commit d1be2d9e1c
5 changed files with 184 additions and 96 deletions
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22
src/SDL_compat.c
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@ -442,7 +442,8 @@ SDL_SetVideoMode(int width, int height, int bpp, Uint32 flags)
}
/* Create a renderer for the window */
if (SDL_CreateRenderer(SDL_VideoWindow, -1, 0) < 0) {
if (SDL_CreateRenderer(SDL_VideoWindow, -1, SDL_Renderer_SingleBuffer) <
0) {
return NULL;
}
@ -517,6 +518,7 @@ SDL_SetVideoMode(int width, int height, int bpp, Uint32 flags)
/* Clear the surface for display */
SDL_FillRect(SDL_PublicSurface, NULL, 0);
SDL_UpdateRect(SDL_PublicSurface, 0, 0, 0, 0);
/* We're finally done! */
return SDL_PublicSurface;
@ -617,21 +619,11 @@ SDL_UpdateRect(SDL_Surface * screen, Sint32 x, Sint32 y, Uint32 w, Uint32 h)
if (screen) {
SDL_Rect rect;
/* Perform some checking */
if (w == 0)
w = screen->w;
if (h == 0)
h = screen->h;
if ((int) (x + w) > screen->w)
return;
if ((int) (y + h) > screen->h)
return;
/* Fill the rectangle */
rect.x = (Sint16) x;
rect.y = (Sint16) y;
rect.w = (Uint16) w;
rect.h = (Uint16) h;
rect.x = (int) x;
rect.y = (int) y;
rect.w = (int) (w ? w : screen->w);
rect.h = (int) (h ? h : screen->h);
SDL_UpdateRects(screen, 1, &rect);
}
}