/* * The ManaPlus Client * Copyright (C) 2011-2015 The ManaPlus Developers * * This file is part of The ManaPlus Client. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ /* _______ __ __ __ ______ __ __ _______ __ __ * / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___ /\ / |\/ /\ * / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / / * / / /__ / / // / // / // / / / ___ / // ___ / // /| ' / / * / /_// /\ / /_// / // / // /_/_ / / // / // /\_/ / // / | / / * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ / * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/ * * 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 UTILS_SDLPIXEL_H #define UTILS_SDLPIXEL_H #include "gui/color.h" #include <SDL.h> /** * 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) { if (!surface) return; const int bpp = surface->format->BytesPerPixel; SDL_LockSurface(surface); Uint8 *const p = static_cast<uint8_t*>(surface->pixels) + static_cast<size_t>(y * surface->pitch + x * bpp); const Uint32 pixel = SDL_MapRGB(surface->format, static_cast<uint8_t>(color.r), static_cast<uint8_t>(color.g), static_cast<uint8_t>(color.b)); switch (bpp) { case 1: *p = static_cast<uint8_t>(pixel); break; case 2: *reinterpret_cast<uint16_t*>(p) = static_cast<uint16_t>(pixel); break; case 3: #if SDL_BYTEORDER == SDL_BIG_ENDIAN p[0] = static_cast<uint8_t>((pixel >> 16) & 0xff); p[1] = static_cast<uint8_t>((pixel >> 8) & 0xff); p[2] = static_cast<uint8_t>((pixel) & 0xff); #else p[0] = static_cast<uint8_t>((pixel) & 0xff); p[1] = static_cast<uint8_t>((pixel >> 8) & 0xff); p[2] = static_cast<uint8_t>((pixel >> 16) & 0xff); #endif break; case 4: *reinterpret_cast<Uint32*>(p) = pixel; break; default: 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(const unsigned int src, const unsigned int dst, const unsigned char a) { const unsigned int b = ((src & 0xff) * a + (dst & 0xff) * (255 - a)) >> 8; const unsigned int g = ((src & 0xff00) * a + (dst & 0xff00) * (255 - a)) >> 8; const unsigned int r = ((src & 0xff0000) * a + (dst & 0xff0000) * (255 - a)) >> 8; return (b & 0xff) | (g & 0xff00) | (r & 0xff0000); } inline unsigned short SDLAlpha16(const unsigned short src, const unsigned short dst, const unsigned char a, const SDL_PixelFormat *const f) A_NONNULL(4); /** * Blends two 16 bit colors together. * * @param src the source color. * @param dst the destination color. * @param a alpha. */ inline unsigned short SDLAlpha16(const unsigned short src, const unsigned short dst, const unsigned char a, const SDL_PixelFormat *const 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 static_cast<unsigned short>((b & f->Rmask) | (g & f->Gmask) | (r & f->Bmask)); } /** * 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) { if (!surface) return; const int bpp = surface->format->BytesPerPixel; SDL_LockSurface(surface); Uint8 *const p = static_cast<uint8_t*>(surface->pixels) + static_cast<size_t>(y * surface->pitch + x * bpp); const Uint32 pixel = SDL_MapRGB(surface->format, static_cast<uint8_t>(color.r), static_cast<uint8_t>(color.g), static_cast<uint8_t>(color.b)); switch (bpp) { case 1: *p = static_cast<uint8_t>(pixel); break; case 2: *reinterpret_cast<Uint16*>(p) = SDLAlpha16( static_cast<unsigned short>(pixel), *reinterpret_cast<unsigned short*>(p), static_cast<unsigned char>(color.a), surface->format); break; case 3: #if SDL_BYTEORDER == SDL_BIG_ENDIAN p[2] = static_cast<uint8_t>((p[2] * (255 - color.a) + color.b * color.a) >> 8); p[1] = static_cast<uint8_t>((p[1] * (255 - color.a) + color.g * color.a) >> 8); p[0] = static_cast<uint8_t>((p[0] * (255 - color.a) + color.r * color.a) >> 8); #else p[0] = static_cast<uint8_t>((p[0] * (255 - color.a) + color.b * color.a) >> 8); p[1] = static_cast<uint8_t>((p[1] * (255 - color.a) + color.g * color.a) >> 8); p[2] = static_cast<uint8_t>((p[2] * (255 - color.a) + color.r * color.a) >> 8); #endif break; case 4: *reinterpret_cast<Uint32*>(p) = SDLAlpha32(pixel, *reinterpret_cast<Uint32*>(p), static_cast<unsigned char>(color.a)); break; default: break; } SDL_UnlockSurface(surface); } #endif // UTILS_SDLPIXEL_H