move sdlpixel file into utils directory.

1 files changed, 232 insertions, 0 deletions

diff --git a/src/utils/sdlpixel.h b/src/utils/sdlpixel.h
new file mode 100644
index 000000000..2a26f28a1
--- /dev/null
+++ b/src/utils/sdlpixel.h
@@ -0,0 +1,232 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2011-2014  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_HPP
+#define UTILS_SDLPIXEL_HPP
+
+#include "SDL.h"
+#include "gui/base/color.hpp"
+
+/**
+  * 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 gcn::Color& color)
+{
+    if (!surface)
+        return;
+
+    int bpp = surface->format->BytesPerPixel;
+
+    SDL_LockSurface(surface);
+
+    Uint8 *p = static_cast<uint8_t*>(surface->pixels)
+        + y * surface->pitch + x * bpp;
+
+    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(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 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 gcn::Color& color)
+{
+    int bpp = surface->format->BytesPerPixel;
+
+    SDL_LockSurface(surface);
+
+    Uint8 *p = static_cast<uint8_t*>(surface->pixels)
+        + y * surface->pitch + x * bpp;
+
+    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_HPP