Mercurial > sdl-ios-xcode
view src/video/SDL_drawpoint.c @ 3689:af25b5586af7
Fixed crash when there was no mouse focus for some reason (iPhone bug?)
author | Sam Lantinga <slouken@libsdl.org> |
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date | Thu, 21 Jan 2010 16:11:55 +0000 |
parents | f638ded38b8a |
children | f7b03b6838cb |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2009 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" 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: */