Mercurial > sdl-ios-xcode
diff src/render/software/SDL_drawpoint.c @ 5166:d72793305335
Making the API simpler, moved the surface drawing functions to the software renderer.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Thu, 03 Feb 2011 02:45:29 -0800 |
parents | src/video/SDL_drawpoint.c@f7b03b6838cb |
children | 710d00cb3a6a |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/render/software/SDL_drawpoint.c Thu Feb 03 02:45:29 2011 -0800 @@ -0,0 +1,117 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997-2010 Sam Lantinga + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + + Sam Lantinga + slouken@libsdl.org +*/ +#include "SDL_config.h" + +#include "SDL_draw.h" +#include "SDL_drawpoint.h" + + +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; + } + + /* 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: + SDL_Unsupported(); + return -1; + 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; +} + +/* vi: set ts=4 sw=4 expandtab: */