Mercurial > sdl-ios-xcode
view src/video/SDL_blendpoint.c @ 3409:c8f580ebc96a
Adam Strzelecki to SDL
Sending a patch for fullscreen Mac OS X SDL 1.3 (SVN) Cocoa mouse position handling. In fullscreen mouse coordinates should be relative to SCREEN not to the window, which doesn't really occupy fullscreen.
Without this patch mouse position (especially Y) was totally incorrect (shifted) in fullscreen.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Thu, 22 Oct 2009 04:46:11 +0000 |
parents | 133601e3b255 |
children | 0267b8b1595c |
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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" static int SDL_BlendPoint_RGB555(SDL_Surface * dst, int x, int y, int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) { unsigned inva = 0xff - a; switch (blendMode) { case SDL_BLENDMODE_BLEND: DRAW_SETPIXELXY_BLEND_RGB555(x, y); break; case SDL_BLENDMODE_ADD: DRAW_SETPIXELXY_ADD_RGB555(x, y); break; case SDL_BLENDMODE_MOD: DRAW_SETPIXELXY_MOD_RGB555(x, y); break; default: DRAW_SETPIXELXY_RGB555(x, y); break; } return 0; } static int SDL_BlendPoint_RGB565(SDL_Surface * dst, int x, int y, int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) { unsigned inva = 0xff - a; switch (blendMode) { case SDL_BLENDMODE_BLEND: DRAW_SETPIXELXY_BLEND_RGB565(x, y); break; case SDL_BLENDMODE_ADD: DRAW_SETPIXELXY_ADD_RGB565(x, y); break; case SDL_BLENDMODE_MOD: DRAW_SETPIXELXY_MOD_RGB565(x, y); break; default: DRAW_SETPIXELXY_RGB565(x, y); break; } return 0; } static int SDL_BlendPoint_RGB888(SDL_Surface * dst, int x, int y, int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) { unsigned inva = 0xff - a; switch (blendMode) { case SDL_BLENDMODE_BLEND: DRAW_SETPIXELXY_BLEND_RGB888(x, y); break; case SDL_BLENDMODE_ADD: DRAW_SETPIXELXY_ADD_RGB888(x, y); break; case SDL_BLENDMODE_MOD: DRAW_SETPIXELXY_MOD_RGB888(x, y); break; default: DRAW_SETPIXELXY_RGB888(x, y); break; } return 0; } static int SDL_BlendPoint_ARGB8888(SDL_Surface * dst, int x, int y, int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) { unsigned inva = 0xff - a; switch (blendMode) { case SDL_BLENDMODE_BLEND: DRAW_SETPIXELXY_BLEND_ARGB8888(x, y); break; case SDL_BLENDMODE_ADD: DRAW_SETPIXELXY_ADD_ARGB8888(x, y); break; case SDL_BLENDMODE_MOD: DRAW_SETPIXELXY_MOD_ARGB8888(x, y); break; default: DRAW_SETPIXELXY_ARGB8888(x, y); break; } return 0; } static int SDL_BlendPoint_RGB(SDL_Surface * dst, int x, int y, int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) { SDL_PixelFormat *fmt = dst->format; unsigned inva = 0xff - a; switch (fmt->BytesPerPixel) { case 2: switch (blendMode) { case SDL_BLENDMODE_BLEND: DRAW_SETPIXELXY2_BLEND_RGB(x, y); break; case SDL_BLENDMODE_ADD: DRAW_SETPIXELXY2_ADD_RGB(x, y); break; case SDL_BLENDMODE_MOD: DRAW_SETPIXELXY2_MOD_RGB(x, y); break; default: DRAW_SETPIXELXY2_RGB(x, y); break; } return 0; case 4: switch (blendMode) { case SDL_BLENDMODE_BLEND: DRAW_SETPIXELXY4_BLEND_RGB(x, y); break; case SDL_BLENDMODE_ADD: DRAW_SETPIXELXY4_ADD_RGB(x, y); break; case SDL_BLENDMODE_MOD: DRAW_SETPIXELXY4_MOD_RGB(x, y); break; default: DRAW_SETPIXELXY4_RGB(x, y); break; } return 0; default: SDL_Unsupported(); return -1; } } static int SDL_BlendPoint_RGBA(SDL_Surface * dst, int x, int y, int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) { SDL_PixelFormat *fmt = dst->format; unsigned inva = 0xff - a; switch (fmt->BytesPerPixel) { case 4: switch (blendMode) { case SDL_BLENDMODE_BLEND: DRAW_SETPIXELXY4_BLEND_RGBA(x, y); break; case SDL_BLENDMODE_ADD: DRAW_SETPIXELXY4_ADD_RGBA(x, y); break; case SDL_BLENDMODE_MOD: DRAW_SETPIXELXY4_MOD_RGBA(x, y); break; default: DRAW_SETPIXELXY4_RGBA(x, y); break; } return 0; default: SDL_Unsupported(); return -1; } } int SDL_BlendPoint(SDL_Surface * dst, int x, int y, int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a) { SDL_PixelFormat *fmt = dst->format; /* This function doesn't work on surfaces < 8 bpp */ if (dst->format->BitsPerPixel < 8) { SDL_SetError("SDL_BlendPoint(): 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; } if ((blendMode == SDL_BLENDMODE_BLEND) || (blendMode == SDL_BLENDMODE_ADD)) { r = DRAW_MUL(r, a); g = DRAW_MUL(g, a); b = DRAW_MUL(b, a); } switch (fmt->BitsPerPixel) { case 15: switch (fmt->Rmask) { case 0x7C00: return SDL_BlendPoint_RGB555(dst, x, y, blendMode, r, g, b, a); } break; case 16: switch (fmt->Rmask) { case 0xF800: return SDL_BlendPoint_RGB565(dst, x, y, blendMode, r, g, b, a); } break; case 32: switch (fmt->Rmask) { case 0x00FF0000: if (!fmt->Amask) { return SDL_BlendPoint_RGB888(dst, x, y, blendMode, r, g, b, a); } else { return SDL_BlendPoint_ARGB8888(dst, x, y, blendMode, r, g, b, a); } break; } default: break; } if (!fmt->Amask) { return SDL_BlendPoint_RGB(dst, x, y, blendMode, r, g, b, a); } else { return SDL_BlendPoint_RGBA(dst, x, y, blendMode, r, g, b, a); } } /* vi: set ts=4 sw=4 expandtab: */