Mercurial > sdl-ios-xcode
diff src/video/SDL_drawpoint.c @ 3536:0267b8b1595c
Added interfaces for batch drawing of points, lines and rects:
SDL_DrawPoints()
SDL_BlendPoints()
SDL_BlendLines()
SDL_DrawLines()
SDL_FillRects()
SDL_BlendRects()
SDL_RenderPoints()
SDL_RenderLines()
SDL_RenderRects()
Renamed SDL_RenderFill() to SDL_RenderRect()
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Wed, 09 Dec 2009 15:56:56 +0000 |
parents | 210e209b87cc |
children | f638ded38b8a |
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--- a/src/video/SDL_drawpoint.c Mon Dec 07 10:08:24 2009 +0000 +++ b/src/video/SDL_drawpoint.c Wed Dec 09 15:56:56 2009 +0000 @@ -27,10 +27,15 @@ int SDL_DrawPoint(SDL_Surface * dst, int x, int y, Uint32 color) { + if (!dst) { + SDL_SetError("Passed NULL destination surface"); + return -1; + } + /* This function doesn't work on surfaces < 8 bpp */ if (dst->format->BitsPerPixel < 8) { SDL_SetError("SDL_DrawPoint(): Unsupported surface format"); - return (-1); + return -1; } /* Perform clipping */ @@ -57,4 +62,55 @@ return 0; } +int +SDL_DrawPoints(SDL_Surface * dst, const SDL_Point * points, int count, + Uint32 color) +{ + int minx, miny; + int maxx, maxy; + int i; + int x, y; + + if (!dst) { + SDL_SetError("Passed NULL destination surface"); + return -1; + } + + /* This function doesn't work on surfaces < 8 bpp */ + if (dst->format->BitsPerPixel < 8) { + SDL_SetError("SDL_DrawPoints(): Unsupported surface format"); + return -1; + } + + minx = dst->clip_rect.x; + maxx = dst->clip_rect.x + dst->clip_rect.w - 1; + miny = dst->clip_rect.y; + maxy = dst->clip_rect.y + dst->clip_rect.h - 1; + + for (i = 0; i < count; ++i) { + x = points[i].x; + y = points[i].y; + + if (x < minx || x > maxx || y < miny || y > maxy) { + continue; + } + + switch (dst->format->BytesPerPixel) { + case 1: + DRAW_FASTSETPIXEL1(x, y); + break; + case 2: + DRAW_FASTSETPIXEL2(x, y); + break; + case 3: + SDL_Unsupported(); + return -1; + case 4: + DRAW_FASTSETPIXEL4(x, y); + break; + } + } + return 0; +} + /* vi: set ts=4 sw=4 expandtab: */