--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/engine/core/video/opengl/renderbackendopengl.cpp	Sun Jun 29 18:44:17 2008 +0000
@@ -0,0 +1,202 @@
+/***************************************************************************
+ *   Copyright (C) 2005-2008 by the FIFE team                              *
+ *   http://www.fifengine.de                                               *
+ *   This file is part of FIFE.                                            *
+ *                                                                         *
+ *   FIFE 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     *
+ *   (at your option) 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, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA              *
+ ***************************************************************************/
+
+// Standard C++ library includes
+
+// Platform specific includes
+
+// 3rd party library includes
+#include <SDL.h>
+
+// FIFE includes
+#include "util/base/exception.h"
+
+#include "fife_opengl.h"
+#include "glimage.h"
+#include "renderbackendopengl.h"
+
+namespace FIFE {
+
+	RenderBackendOpenGL::RenderBackendOpenGL() : RenderBackend() {
+		// Get the pixelformat we want.
+		SDL_Surface* testsurface = SDL_CreateRGBSurface(SDL_SWSURFACE | SDL_SRCALPHA, 1, 1, 32,
+				RMASK, GMASK, BMASK ,AMASK);
+
+		m_rgba_format = *(testsurface->format);
+		SDL_FreeSurface(testsurface);
+	}
+
+	const std::string& RenderBackendOpenGL::getName() const {
+		static std::string backend_name = "OpenGL";
+		return backend_name;
+	}
+
+	RenderBackendOpenGL::~RenderBackendOpenGL() {
+	}
+
+
+	void RenderBackendOpenGL::init() {
+		Uint32 flags = SDL_INIT_VIDEO;
+		if (SDL_InitSubSystem(flags) < 0)
+			throw SDLException(SDL_GetError());
+
+		SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL); // temporary hack
+	}
+
+	Image* RenderBackendOpenGL::createMainScreen(unsigned int width, unsigned int height, unsigned char bitsPerPixel, bool fs) {
+		delete m_screen;
+		m_screen = 0;
+
+		Uint32 flags = SDL_OPENGL | SDL_GL_DOUBLEBUFFER | SDL_HWPALETTE | SDL_HWACCEL;
+		if ( fs ) {
+			flags |= SDL_FULLSCREEN;
+		}
+
+		SDL_Surface* screen = NULL;
+
+		if( 0 == bitsPerPixel ) {
+			/// autodetect best mode
+			unsigned char possibleBitsPerPixel[] = {32, 24, 16, 0};
+			int i = 0;
+			while( true ) {
+				bitsPerPixel = possibleBitsPerPixel[i];
+				if( !bitsPerPixel ) {
+					throw SDLException("Videomode not available");
+				}
+
+				if ( SDL_VideoModeOK(width, height, bitsPerPixel, flags) ) {
+					screen = SDL_SetVideoMode(width, height, bitsPerPixel, flags);
+					if( screen ) {
+						break;
+					}
+				}
+				++i;
+			}
+		} else {
+			if ( !SDL_VideoModeOK(width, height, bitsPerPixel, flags) ) {
+				throw SDLException("Videomode not available");
+			}
+			screen = SDL_SetVideoMode(width, height, bitsPerPixel, flags);
+		}
+
+		SDL_WM_SetCaption("FIFE", 0);
+
+		if (!screen) {
+			throw SDLException(SDL_GetError());
+		}
+
+		glViewport(0, 0, width, height);
+		glMatrixMode(GL_PROJECTION);
+		gluOrtho2D(0, width, height, 0);
+		glMatrixMode(GL_MODELVIEW);
+
+		glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
+		glEnable(GL_TEXTURE_2D);
+		glEnable(GL_BLEND);
+		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+		glEnable(GL_SCISSOR_TEST);
+
+		glPointSize(1.0);
+		glLineWidth(1.0);
+
+		m_screen = new GLImage(screen);
+		return m_screen;
+	}
+
+	void RenderBackendOpenGL::startFrame() {
+		glClear(GL_COLOR_BUFFER_BIT);
+	}
+
+	void RenderBackendOpenGL::endFrame() {
+		SDL_GL_SwapBuffers();
+	}
+
+	Image* RenderBackendOpenGL::createImage(SDL_Surface* surface) {
+		// Given an abritary surface, we must convert it to the format GLImage will understand.
+		// It's easiest to let SDL do this for us.
+
+		// Uh. Gotta love this :-)
+		// Check for colorkey too?
+		// Leave out the loss/shift checks?
+		if(    m_rgba_format.BitsPerPixel == surface->format->BitsPerPixel
+			&& m_rgba_format.Rmask == surface->format->Rmask
+			&& m_rgba_format.Gmask == surface->format->Gmask
+			&& m_rgba_format.Bmask == surface->format->Bmask
+			&& m_rgba_format.Amask == surface->format->Amask
+			&& m_rgba_format.Rshift == surface->format->Rshift
+			&& m_rgba_format.Gshift == surface->format->Gshift
+			&& m_rgba_format.Bshift == surface->format->Bshift
+			&& m_rgba_format.Ashift == surface->format->Ashift
+			&& m_rgba_format.Rloss == surface->format->Rloss
+			&& m_rgba_format.Gloss == surface->format->Gloss
+			&& m_rgba_format.Bloss == surface->format->Bloss
+			&& m_rgba_format.Aloss == surface->format->Aloss
+			&& surface->flags & SDL_SRCALPHA   ) {
+
+			return new GLImage(surface);
+		}
+
+		SDL_Surface* conv = SDL_ConvertSurface(surface, &m_rgba_format, SDL_SWSURFACE|SDL_SRCALPHA);
+		GLImage* image = new GLImage(conv);
+		SDL_FreeSurface( surface );
+		return image;
+	}
+
+	Image* RenderBackendOpenGL::createImage(const uint8_t* data, unsigned int width, unsigned int height) {
+		return new GLImage(data, width, height);
+	}
+	
+	bool RenderBackendOpenGL::putPixel(int x, int y, int r, int g, int b) {
+		if ((x < 0) || (x >= (int)getWidth()) || (y < 0) || (y >= (int)getHeight())) {
+			return false;
+		}
+		glColor4ub(r, g, b, 255);
+		glBegin(GL_POINTS);
+		glVertex2i(x, y);
+		glEnd();
+		std::cout << x << ", "<< y << "\n";
+		return true;
+	}
+	
+	void RenderBackendOpenGL::drawLine(const Point& p1, const Point& p2, int r, int g, int b) {
+		glColor4ub(r, g, b, 255);
+		glBegin(GL_LINES);
+		glVertex3f(p1.x+0.5f, p1.y+0.5f, 0);
+		glVertex3f(p2.x+0.5f, p2.y+0.5f, 0);
+		glEnd();
+
+		glBegin(GL_POINTS);
+		glVertex3f(p2.x+0.5f, p2.y+0.5f, 0);
+		glEnd();
+	}
+	
+	void RenderBackendOpenGL::drawQuad(const Point& p1, const Point& p2, const Point& p3, const Point& p4,  int r, int g, int b) {
+	        glColor4ub(r, g, b, 165);
+		glBegin(GL_QUADS);
+		glVertex3f(p1.x, p1.y, 0);
+		glVertex3f(p2.x, p2.y, 0);
+		glVertex3f(p3.x, p3.y, 0);
+		glVertex3f(p4.x, p4.y, 0);
+		glEnd();
+	}
+	
+}