From f4f5aa5d603cc49615e3c7e58d7963e01310af84 Mon Sep 17 00:00:00 2001 From: Andrei Karas Date: Mon, 30 May 2011 20:52:38 +0300 Subject: Add missing guichan files. --- src/guichan/sdl/sdlpixel.hpp | 260 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 260 insertions(+) create mode 100644 src/guichan/sdl/sdlpixel.hpp (limited to 'src/guichan/sdl/sdlpixel.hpp') diff --git a/src/guichan/sdl/sdlpixel.hpp b/src/guichan/sdl/sdlpixel.hpp new file mode 100644 index 000000000..49686ebc1 --- /dev/null +++ b/src/guichan/sdl/sdlpixel.hpp @@ -0,0 +1,260 @@ +/* _______ __ __ __ ______ __ __ _______ __ __ + * / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___ /\ / |\/ /\ + * / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / / + * / / /__ / / // / // / // / / / ___ / // ___ / // /| ' / / + * / /_// /\ / /_// / // / // /_/_ / / // / // /\_/ / // / | / / + * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ / + * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/ + * + * Copyright (c) 2004 - 2008 Olof Naessén and Per Larsson + * + * + * Per Larsson a.k.a finalman + * Olof Naessén a.k.a jansem/yakslem + * + * Visit: http://guichan.sourceforge.net + * + * License: (BSD) + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name of Guichan nor the names of its contributors may + * be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED + * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef GCN_SDLPIXEL_HPP +#define GCN_SDLPIXEL_HPP + +#include "SDL.h" +#include "guichan/color.hpp" + +namespace gcn +{ + + /** + * Checks a pixels color of an SDL_Surface. + * + * @param surface an SDL_Surface where to check for a pixel color. + * @param x the x coordinate on the surface. + * @param y the y coordinate on the surface. + * @return a color of a pixel. + */ + inline const Color SDLgetPixel(SDL_Surface* surface, int x, int y) + { + int bpp = surface->format->BytesPerPixel; + + SDL_LockSurface(surface); + + Uint8 *p = (Uint8 *)surface->pixels + y * surface->pitch + x * bpp; + + unsigned int color = 0; + + switch(bpp) + { + case 1: + color = *p; + break; + + case 2: + color = *(Uint16 *)p; + break; + + case 3: + if(SDL_BYTEORDER == SDL_BIG_ENDIAN) + { + color = p[0] << 16 | p[1] << 8 | p[2]; + } + else + { + color = p[0] | p[1] << 8 | p[2] << 16; + } + break; + + case 4: + color = *(Uint32 *)p; + break; + + } + + unsigned char r,g,b,a; + + SDL_GetRGBA(color, surface->format, &r, &g, &b, &a); + SDL_UnlockSurface(surface); + + return Color(r,g,b,a); + } + + /** + * Puts a pixel on an SDL_Surface. + * + * @param x the x coordinate on the surface. + * @param y the y coordinate on the surface. + * @param color the color the pixel should be in. + */ + inline void SDLputPixel(SDL_Surface* surface, int x, int y, const Color& color) + { + int bpp = surface->format->BytesPerPixel; + + SDL_LockSurface(surface); + + Uint8 *p = (Uint8 *)surface->pixels + y * surface->pitch + x * bpp; + + Uint32 pixel = SDL_MapRGB(surface->format, color.r, color.g, color.b); + + switch(bpp) + { + case 1: + *p = pixel; + break; + + case 2: + *(Uint16 *)p = pixel; + break; + + case 3: + if(SDL_BYTEORDER == SDL_BIG_ENDIAN) + { + p[0] = (pixel >> 16) & 0xff; + p[1] = (pixel >> 8) & 0xff; + p[2] = pixel & 0xff; + } + else + { + p[0] = pixel & 0xff; + p[1] = (pixel >> 8) & 0xff; + p[2] = (pixel >> 16) & 0xff; + } + break; + + case 4: + *(Uint32 *)p = pixel; + break; + } + + SDL_UnlockSurface(surface); + } + + /** + * Blends two 32 bit colors together. + * + * @param src the source color. + * @param dst the destination color. + * @param a alpha. + */ + inline unsigned int SDLAlpha32(unsigned int src, unsigned int dst, unsigned char a) + { + unsigned int b = ((src & 0xff) * a + (dst & 0xff) * (255 - a)) >> 8; + unsigned int g = ((src & 0xff00) * a + (dst & 0xff00) * (255 - a)) >> 8; + unsigned int r = ((src & 0xff0000) * a + (dst & 0xff0000) * (255 - a)) >> 8; + + return (b & 0xff) | (g & 0xff00) | (r & 0xff0000); + } + + /** + * Blends two 16 bit colors together. + * + * @param src the source color. + * @param dst the destination color. + * @param a alpha. + */ + inline unsigned short SDLAlpha16(unsigned short src, unsigned short dst, unsigned char a, const SDL_PixelFormat *f) + { + unsigned int b = ((src & f->Rmask) * a + (dst & f->Rmask) * (255 - a)) >> 8; + unsigned int g = ((src & f->Gmask) * a + (dst & f->Gmask) * (255 - a)) >> 8; + unsigned int r = ((src & f->Bmask) * a + (dst & f->Bmask) * (255 - a)) >> 8; + + return (unsigned short)((b & f->Rmask) | (g & f->Gmask) | (r & f->Bmask)); + } + + /* + typedef struct{ + SDL_Palette *palette; + Uint8 BitsPerPixel; + Uint8 BytesPerPixel; + Uint32 Rmask, Gmask, Bmask, Amask; + Uint8 Rshift, Gshift, Bshift, Ashift; + Uint8 Rloss, Gloss, Bloss, Aloss; + Uint32 colorkey; + Uint8 alpha; + } SDL_PixelFormat; + */ + + /** + * Puts a pixel on an SDL_Surface with alpha + * + * @param x the x coordinate on the surface. + * @param y the y coordinate on the surface. + * @param color the color the pixel should be in. + */ + inline void SDLputPixelAlpha(SDL_Surface* surface, int x, int y, const Color& color) + { + int bpp = surface->format->BytesPerPixel; + + SDL_LockSurface(surface); + + Uint8 *p = (Uint8 *)surface->pixels + y * surface->pitch + x * bpp; + + Uint32 pixel = SDL_MapRGB(surface->format, color.r, color.g, color.b); + + switch(bpp) + { + case 1: + *p = pixel; + break; + + case 2: + *(Uint16 *)p = SDLAlpha16(pixel, *(Uint32 *)p, color.a, surface->format); + break; + + case 3: + if(SDL_BYTEORDER == SDL_BIG_ENDIAN) + { + unsigned int r = (p[0] * (255 - color.a) + color.r * color.a) >> 8; + unsigned int g = (p[1] * (255 - color.a) + color.g * color.a) >> 8; + unsigned int b = (p[2] * (255 - color.a) + color.b * color.a) >> 8; + + p[2] = b; + p[1] = g; + p[0] = r; + } + else + { + unsigned int r = (p[2] * (255 - color.a) + color.r * color.a) >> 8; + unsigned int g = (p[1] * (255 - color.a) + color.g * color.a) >> 8; + unsigned int b = (p[0] * (255 - color.a) + color.b * color.a) >> 8; + + p[0] = b; + p[1] = g; + p[2] = r; + } + break; + + case 4: + *(Uint32 *)p = SDLAlpha32(pixel, *(Uint32 *)p, color.a); + break; + } + + SDL_UnlockSurface(surface); + } +} + +#endif // end GCN_SDLPIXEL_HPP -- cgit v1.2.3-70-g09d2