--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ext/guichan-0.8.2/src/opengl/openglimage.cpp	Mon Jan 11 23:34:52 2010 +0000
@@ -0,0 +1,288 @@
+/*      _______   __   __   __   ______   __   __   _______   __   __
+ *     / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___  /\ /  |\/ /\
+ *    / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
+ *   / / /__   / / // / // / // / /    / ___  / // ___  / // /| ' / /
+ *  / /_// /\ / /_// / // / // /_/_   / / // / // /\_/ / // / |  / /
+ * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
+ * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
+ *
+ * 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.
+ */
+
+/*
+ * For comments regarding functions please see the header file.
+ */
+
+#include "guichan/opengl/openglimage.hpp"
+
+#include "guichan/exception.hpp"
+
+namespace gcn
+{
+    OpenGLImage::OpenGLImage(const unsigned int* pixels, int width, int height,
+                             bool convertToDisplayFormat)
+    {
+        mAutoFree = true;
+
+        mWidth = width;
+        mHeight = height;
+        mTextureWidth = 1, mTextureHeight = 1;
+
+        while(mTextureWidth < mWidth)
+        {
+            mTextureWidth *= 2;
+        }
+
+        while(mTextureHeight < mHeight)
+        {
+            mTextureHeight *= 2;
+        }
+
+        // Create a new pixel array and copy the pixels into it
+        mPixels = new unsigned int[mTextureWidth * mTextureHeight];
+
+#ifdef __BIG_ENDIAN__
+        const unsigned int magicPink = 0xff00ffff;
+#else
+        const unsigned int magicPink = 0xffff00ff;
+#endif
+        int x, y;
+        for (y = 0; y < mTextureHeight; y++)
+        {
+            for (x = 0; x < mTextureWidth; x++)
+            {
+                if (x < mWidth && y < mHeight)
+                {
+                    unsigned int c = pixels[x + y * mWidth];
+
+                    // Magic pink to transparent
+                    if (c == magicPink)
+                    {
+                        c = 0x00000000;
+                    }
+
+                    mPixels[x + y * mTextureWidth] = c;
+                }
+                else
+                {
+                    mPixels[x + y * mTextureWidth] = 0x00000000;
+                }
+            }
+        }
+
+        if (convertToDisplayFormat)
+        {
+            OpenGLImage::convertToDisplayFormat();
+        }
+    }
+
+    OpenGLImage::OpenGLImage(GLuint textureHandle, int width, int height, bool autoFree)
+    {
+        mTextureHandle = textureHandle;
+        mAutoFree = autoFree;
+        mPixels = NULL;
+
+        mWidth = width;
+        mHeight = height;
+        mTextureWidth = 1, mTextureHeight = 1;
+
+        while(mTextureWidth < mWidth)
+        {
+            mTextureWidth *= 2;
+        }
+
+        while(mTextureHeight < mHeight)
+        {
+            mTextureHeight *= 2;
+        }
+    }
+
+    OpenGLImage::~OpenGLImage()
+    {
+        if (mAutoFree)
+        {
+            free();
+        }
+    }
+
+    GLuint OpenGLImage::getTextureHandle() const
+    {
+        return mTextureHandle;
+    }
+
+    int OpenGLImage::getTextureWidth() const
+    {
+        return mTextureWidth;
+    }
+
+    int OpenGLImage::getTextureHeight() const
+    {
+        return mTextureHeight;
+    }
+
+    void OpenGLImage::free()
+    {
+        if (mPixels == NULL)
+        {
+            glDeleteTextures(1, &mTextureHandle);
+        }
+        else
+        {
+            delete[] mPixels;
+            mPixels = NULL;
+        }
+    }
+
+    int OpenGLImage::getWidth() const
+    {
+        return mWidth;
+    }
+
+    int OpenGLImage::getHeight() const
+    {
+        return mHeight;
+    }
+
+    Color OpenGLImage::getPixel(int x, int y)
+    {
+        if (mPixels == NULL)
+        {
+            throw GCN_EXCEPTION("Image has been converted to display format");
+        }
+
+        if (x < 0 || x >= mWidth || y < 0 || y >= mHeight)
+        {
+            throw GCN_EXCEPTION("Coordinates outside of the image");
+        }
+
+        unsigned int c = mPixels[x + y * mTextureWidth];
+
+#ifdef __BIG_ENDIAN__
+        unsigned char r = (unsigned char) ((c >> 24) & 0xff);
+        unsigned char g = (unsigned char) ((c >> 16) & 0xff);
+        unsigned char b = (unsigned char) ((c >> 8) & 0xff);
+        unsigned char a = (unsigned char) (c & 0xff);
+#else
+        unsigned char a = (unsigned char) ((c >> 24) & 0xff);
+        unsigned char b = (unsigned char) ((c >> 16) & 0xff);
+        unsigned char g = (unsigned char) ((c >> 8) & 0xff);
+        unsigned char r = (unsigned char) (c & 0xff);
+#endif
+
+        return Color(r, g, b, a);
+    }
+
+    void OpenGLImage::putPixel(int x, int y, const Color& color)
+    {
+        if (mPixels == NULL)
+        {
+            throw GCN_EXCEPTION("Image has been converted to display format");
+        }
+
+        if (x < 0 || x >= mWidth || y < 0 || y >= mHeight)
+        {
+            throw GCN_EXCEPTION("Coordinates outside of the image");
+        }
+
+#ifdef __BIG_ENDIAN__
+        unsigned int c = color.a | color.b << 8 | color.g << 16 | color.r << 24;
+#else
+        unsigned int c = color.r | color.g << 8 | color.b << 16 | color.a << 24;
+#endif
+
+        mPixels[x + y * mTextureWidth] = c;
+    }
+
+    void OpenGLImage::convertToDisplayFormat()
+    {
+        if (mPixels == NULL)
+        {
+            throw GCN_EXCEPTION("Image has already been converted to display format");
+        }
+
+        glGenTextures(1, &mTextureHandle);
+        glBindTexture(GL_TEXTURE_2D, mTextureHandle);
+
+        glTexImage2D(GL_TEXTURE_2D,
+                     0,
+                     4,
+                     mTextureWidth,
+                     mTextureHeight,
+                     0,
+                     GL_RGBA,
+                     GL_UNSIGNED_BYTE,
+                     mPixels);
+
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+        delete[] mPixels;
+        mPixels = NULL;
+
+        GLenum error = glGetError();
+        if (error)
+        {
+            std::string errmsg;
+            switch (error)
+            {
+              case GL_INVALID_ENUM:
+                  errmsg = "GL_INVALID_ENUM";
+                  break;
+
+              case GL_INVALID_VALUE:
+                  errmsg = "GL_INVALID_VALUE";
+                  break;
+
+              case GL_INVALID_OPERATION:
+                  errmsg = "GL_INVALID_OPERATION";
+                  break;
+
+              case GL_STACK_OVERFLOW:
+                  errmsg = "GL_STACK_OVERFLOW";
+                  break;
+
+              case GL_STACK_UNDERFLOW:
+                  errmsg = "GL_STACK_UNDERFLOW";
+                  break;
+
+              case GL_OUT_OF_MEMORY:
+                  errmsg = "GL_OUT_OF_MEMORY";
+                  break;
+            }
+
+            throw GCN_EXCEPTION(std::string("Unable to convert to OpenGL display format, glGetError said: ") + errmsg);
+        }
+    }
+}