--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ext/guichan-0.8.1/src/opengl/openglgraphics.cpp	Sun Jun 29 18:44:17 2008 +0000
@@ -0,0 +1,364 @@
+/*      _______   __   __   __   ______   __   __   _______   __   __
+ *     / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___  /\ /  |\/ /\
+ *    / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
+ *   / / /__   / / // / // / // / /    / ___  / // ___  / // /| ' / /
+ *  / /_// /\ / /_// / // / // /_/_   / / // / // /\_/ / // / |  / /
+ * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
+ * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
+ *
+ * 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/openglgraphics.hpp"
+
+#if defined (_WIN32)
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#endif
+
+#if defined (__amigaos4__)
+#include <mgl/gl.h>
+#define glVertex3i glVertex3f
+#elif defined(__APPLE__)
+#include <OpenGL/gl.h>
+#else
+#include <GL/gl.h>
+#endif
+
+#include "guichan/exception.hpp"
+#include "guichan/image.hpp"
+#include "guichan/opengl/openglimage.hpp"
+
+namespace gcn
+{
+    OpenGLGraphics::OpenGLGraphics()
+    {
+        setTargetPlane(640, 480);
+        mAlpha = false;
+    }
+
+    OpenGLGraphics::OpenGLGraphics(int width, int height)
+    {
+        setTargetPlane(width, height);
+    }
+
+    OpenGLGraphics::~OpenGLGraphics()
+    {
+
+    }
+
+    void OpenGLGraphics::_beginDraw()
+    {
+        glPushAttrib(
+            GL_COLOR_BUFFER_BIT |
+            GL_CURRENT_BIT |
+            GL_DEPTH_BUFFER_BIT |
+            GL_ENABLE_BIT |
+            GL_FOG_BIT |
+            GL_LIGHTING_BIT |
+            GL_LINE_BIT |
+            GL_POINT_BIT |
+            GL_POLYGON_BIT |
+            GL_SCISSOR_BIT |
+            GL_STENCIL_BUFFER_BIT |
+            GL_TEXTURE_BIT |
+            GL_TRANSFORM_BIT |
+            GL_POINT_BIT |
+            GL_LINE_BIT
+            );
+
+        glMatrixMode(GL_MODELVIEW);
+        glPushMatrix();
+        glLoadIdentity();
+
+        glMatrixMode(GL_TEXTURE);
+        glPushMatrix();
+        glLoadIdentity();
+
+        glMatrixMode(GL_PROJECTION);
+        glPushMatrix();
+        glLoadIdentity();
+        
+        glOrtho(0.0,
+                (double)mWidth,
+                (double)mHeight,
+                0.0,
+                -1.0,
+                1.0);
+
+        glDisable(GL_LIGHTING);
+        glDisable(GL_CULL_FACE);
+        glDisable(GL_DEPTH_TEST);
+        glDisable(GL_TEXTURE_2D);
+
+        glEnable(GL_SCISSOR_TEST);
+        glPointSize(1.0);
+        glLineWidth(1.0);
+
+        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+        glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+
+        pushClipArea(Rectangle(0, 0, mWidth, mHeight));
+    }
+
+    void OpenGLGraphics::_endDraw()
+    {
+        glMatrixMode(GL_MODELVIEW);
+        glPopMatrix();
+
+        glMatrixMode(GL_TEXTURE);
+        glPopMatrix();
+
+        glMatrixMode(GL_PROJECTION);
+        glPopMatrix();
+
+        glPopAttrib();
+
+        popClipArea();
+    }
+
+    bool OpenGLGraphics::pushClipArea(Rectangle area)
+    {
+        bool result = Graphics::pushClipArea(area);
+
+        glScissor(mClipStack.top().x,
+                  mHeight - mClipStack.top().y - mClipStack.top().height,
+                  mClipStack.top().width,
+                  mClipStack.top().height);
+
+        return result;
+    }
+
+    void OpenGLGraphics::popClipArea()
+    {
+        Graphics::popClipArea();
+
+        if (mClipStack.empty())
+        {
+            return;
+        }
+
+        glScissor(mClipStack.top().x,
+                  mHeight - mClipStack.top().y - mClipStack.top().height,
+                  mClipStack.top().width,
+                  mClipStack.top().height);
+    }
+
+    void OpenGLGraphics::setTargetPlane(int width, int height)
+    {
+        mWidth = width;
+        mHeight = height;
+    }
+
+    void OpenGLGraphics::drawImage(const Image* image,
+                                   int srcX,
+                                   int srcY,
+                                   int dstX,
+                                   int dstY,
+                                   int width,
+                                   int height)
+    {
+		const OpenGLImage* srcImage = dynamic_cast<const OpenGLImage*>(image);
+
+        if (srcImage == NULL)
+        {
+            throw GCN_EXCEPTION("Trying to draw an image of unknown format, must be an OpenGLImage.");
+        }
+
+        if (mClipStack.empty())
+        {
+            throw GCN_EXCEPTION("Clip stack is empty, perhaps you called a draw funtion outside of _beginDraw() and _endDraw()?");
+        }
+
+        const ClipRectangle& top = mClipStack.top();
+
+        dstX += top.xOffset;
+        dstY += top.yOffset;
+
+        // Find OpenGL texture coordinates
+        float texX1 = srcX / (float)srcImage->getTextureWidth();
+        float texY1 = srcY / (float)srcImage->getTextureHeight();
+        float texX2 = (srcX+width) / (float)srcImage->getTextureWidth();
+        float texY2 = (srcY+height) / (float)srcImage->getTextureHeight();
+
+        glBindTexture(GL_TEXTURE_2D, srcImage->getTextureHandle());
+
+        glEnable(GL_TEXTURE_2D);
+
+        // Check if blending already is enabled
+        if (!mAlpha)
+        {
+            glEnable(GL_BLEND);
+        }
+
+        // Draw a textured quad -- the image
+        glBegin(GL_QUADS);
+        glTexCoord2f(texX1, texY1);
+        glVertex3i(dstX, dstY, 0);
+
+        glTexCoord2f(texX1, texY2);
+        glVertex3i(dstX, dstY + height, 0);
+
+        glTexCoord2f(texX2, texY2);
+        glVertex3i(dstX + width, dstY + height, 0);
+
+        glTexCoord2f(texX2, texY1);
+        glVertex3i(dstX + width, dstY, 0);
+        glEnd();
+        glDisable(GL_TEXTURE_2D);
+
+        // Don't disable blending if the color has alpha
+        if (!mAlpha)
+        {
+            glDisable(GL_BLEND);
+        }
+    }
+
+    void OpenGLGraphics::drawPoint(int x, int y)
+    {
+        if (mClipStack.empty())
+        {
+            throw GCN_EXCEPTION("Clip stack is empty, perhaps you called a draw funtion outside of _beginDraw() and _endDraw()?");
+        }
+
+        const ClipRectangle& top = mClipStack.top();
+
+        x += top.xOffset;
+        y += top.yOffset;
+
+        glBegin(GL_POINTS);
+        glVertex2i(x, y);
+        glEnd();
+    }
+
+    void OpenGLGraphics::drawLine(int x1, int y1, int x2, int y2)
+    {
+        if (mClipStack.empty())
+        {
+            throw GCN_EXCEPTION("Clip stack is empty, perhaps you called a draw funtion outside of _beginDraw() and _endDraw()?");
+        }
+
+        const ClipRectangle& top = mClipStack.top();
+
+        x1 += top.xOffset;
+        y1 += top.yOffset;
+        x2 += top.xOffset;
+        y2 += top.yOffset;
+
+        glBegin(GL_LINES);
+        glVertex2f(x1 + 0.375f,
+                   y1 + 0.375f);
+        glVertex2f(x2 + 1.0f - 0.375f,
+                   y2 + 1.0f - 0.375f);
+        glEnd();
+
+        glBegin(GL_POINTS);
+        glVertex2f(x2 + 1.0f - 0.375f,
+                   y2 + 1.0f - 0.375f);
+        glEnd();
+
+        glBegin(GL_POINTS);
+        glVertex2f(x1 + 0.375f,
+                   y1 + 0.375f);
+        glEnd();
+
+        
+    }
+
+    void OpenGLGraphics::drawRectangle(const Rectangle& rectangle)
+    {
+        if (mClipStack.empty())
+        {
+            throw GCN_EXCEPTION("Clip stack is empty, perhaps you called a draw funtion outside of _beginDraw() and _endDraw()?");
+        }
+
+        const ClipRectangle& top = mClipStack.top();
+        
+        glBegin(GL_LINE_LOOP);
+        glVertex2f(rectangle.x + top.xOffset,
+                   rectangle.y + top.yOffset);
+        glVertex2f(rectangle.x + rectangle.width + top.xOffset - 1.0f,
+                   rectangle.y + top.yOffset + 0.375f);
+        glVertex2f(rectangle.x + rectangle.width + top.xOffset - 1.0f,
+                   rectangle.y + rectangle.height + top.yOffset);
+        glVertex2f(rectangle.x + top.xOffset,
+                   rectangle.y + rectangle.height + top.yOffset);
+        glEnd();
+    }
+
+    void OpenGLGraphics::fillRectangle(const Rectangle& rectangle)
+    {
+        if (mClipStack.empty())
+        {
+            throw GCN_EXCEPTION("Clip stack is empty, perhaps you called a draw funtion outside of _beginDraw() and _endDraw()?");
+        }
+
+        const ClipRectangle& top = mClipStack.top();
+
+        glBegin(GL_QUADS);
+        glVertex2i(rectangle.x + top.xOffset,
+                   rectangle.y + top.yOffset);
+        glVertex2i(rectangle.x + rectangle.width + top.xOffset,
+                   rectangle.y + top.yOffset);
+        glVertex2i(rectangle.x + rectangle.width + top.xOffset,
+                   rectangle.y + rectangle.height + top.yOffset);
+        glVertex2i(rectangle.x + top.xOffset,
+                   rectangle.y + rectangle.height + top.yOffset);
+        glEnd();
+    }
+
+    void OpenGLGraphics::setColor(const Color& color)
+    {
+        mColor = color;
+        glColor4ub(color.r, color.g, color.b, color.a);
+
+        mAlpha = color.a != 255;
+
+        if (mAlpha)
+        {
+            glEnable(GL_BLEND);
+        }
+    }
+
+    const Color& OpenGLGraphics::getColor() const
+    {
+        return mColor;
+    }
+}