int SDL_DrawPoint(SDL_Surface * dst, int x, int y, Uint32 color) { if (!dst) { return SDL_SetError("Passed NULL destination surface"); } /* This function doesn't work on surfaces < 8 bpp */ if (dst->format->BitsPerPixel < 8) { return SDL_SetError("SDL_DrawPoint(): Unsupported surface format"); } /* Perform clipping */ if (x < dst->clip_rect.x || y < dst->clip_rect.y || x >= (dst->clip_rect.x + dst->clip_rect.w) || y >= (dst->clip_rect.y + dst->clip_rect.h)) { return 0; } switch (dst->format->BytesPerPixel) { case 1: DRAW_FASTSETPIXELXY1(x, y); break; case 2: DRAW_FASTSETPIXELXY2(x, y); break; case 3: return SDL_Unsupported(); case 4: DRAW_FASTSETPIXELXY4(x, y); break; } 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_FASTSETPIXELXY1(x, y); break; case 2: DRAW_FASTSETPIXELXY2(x, y); break; case 3: SDL_Unsupported(); return -1; case 4: DRAW_FASTSETPIXELXY4(x, y); break; } } return 0; }