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-rw-r--r--src/utils/sdlpixel.h254
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diff --git a/src/utils/sdlpixel.h b/src/utils/sdlpixel.h
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--- a/src/utils/sdlpixel.h
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-/*
- * The ManaPlus Client
- * Copyright (C) 2011-2017 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"
-
-PRAGMA48(GCC diagnostic push)
-PRAGMA48(GCC diagnostic ignored "-Wshadow")
-#include <SDL.h>
-PRAGMA48(GCC diagnostic pop)
-
-#ifndef SDL_BYTEORDER
-#error missing SDL_endian.h
-#endif // SDL_BYTEORDER
-
-/**
- * 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 == nullptr)
- return;
-
- const int bpp = surface->format->BytesPerPixel;
-
- SDL_LockSurface(surface);
-
- Uint8 *const p = static_cast<uint8_t*>(surface->pixels)
- + CAST_SIZE(y * surface->pitch + x * bpp);
-
- const Uint32 pixel = SDL_MapRGB(surface->format,
- CAST_U8(color.r), CAST_U8(color.g),
- CAST_U8(color.b));
-
- switch (bpp)
- {
- case 1:
- *p = CAST_U8(pixel);
- break;
-
- case 2:
- *reinterpret_cast<uint16_t*>(p) = CAST_U16(pixel);
- break;
-
- case 3:
-#if SDL_BYTEORDER == SDL_BIG_ENDIAN
- p[0] = CAST_U8((pixel >> 16) & 0xff);
- p[1] = CAST_U8((pixel >> 8) & 0xff);
- p[2] = CAST_U8((pixel) & 0xff);
-#else // SDL_BYTEORDER == SDL_BIG_ENDIAN
-
- p[0] = CAST_U8((pixel) & 0xff);
- p[1] = CAST_U8((pixel >> 8) & 0xff);
- p[2] = CAST_U8((pixel >> 16) & 0xff);
-#endif // SDL_BYTEORDER == SDL_BIG_ENDIAN
-
- 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 == nullptr)
- return;
- const int bpp = surface->format->BytesPerPixel;
-
- SDL_LockSurface(surface);
-
- Uint8 *const p = static_cast<uint8_t*>(surface->pixels)
- + CAST_SIZE(y * surface->pitch + x * bpp);
-
- const Uint32 pixel = SDL_MapRGB(surface->format,
- CAST_U8(color.r),
- CAST_U8(color.g),
- CAST_U8(color.b));
-
- switch (bpp)
- {
- case 1:
- *p = CAST_U8(pixel);
- break;
-
- case 2:
- *reinterpret_cast<Uint16*>(p) = SDLAlpha16(
- static_cast<unsigned short>(pixel),
- *reinterpret_cast<unsigned short*>(p),
- CAST_U8(color.a), surface->format);
- break;
-
- case 3:
-#if SDL_BYTEORDER == SDL_BIG_ENDIAN
- p[2] = CAST_U8((p[2] * (255 - color.a)
- + color.b * color.a) >> 8);
- p[1] = CAST_U8((p[1] * (255 - color.a)
- + color.g * color.a) >> 8);
- p[0] = CAST_U8((p[0] * (255 - color.a)
- + color.r * color.a) >> 8);
-#else // SDL_BYTEORDER == SDL_BIG_ENDIAN
-
- p[0] = CAST_U8((p[0] * (255 - color.a)
- + color.b * color.a) >> 8);
- p[1] = CAST_U8((p[1] * (255 - color.a)
- + color.g * color.a) >> 8);
- p[2] = CAST_U8((p[2] * (255 - color.a)
- + color.r * color.a) >> 8);
-#endif // SDL_BYTEORDER == SDL_BIG_ENDIAN
-
- break;
-
- case 4:
- *reinterpret_cast<Uint32*>(p) = SDLAlpha32(pixel,
- *reinterpret_cast<Uint32*>(p),
- CAST_U8(color.a));
- break;
- default:
- break;
- }
-
- SDL_UnlockSurface(surface);
-}
-
-#endif // UTILS_SDLPIXEL_H
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