glimage.h

00001 /***************************************************************************
00002  *   Copyright (C) 2005-2008 by the FIFE team                              *
00003  *   http://www.fifengine.de                                               *
00004  *   This file is part of FIFE.                                            *
00005  *                                                                         *
00006  *   FIFE is free software; you can redistribute it and/or                 *
00007  *   modify it under the terms of the GNU Lesser General Public            *
00008  *   License as published by the Free Software Foundation; either          *
00009  *   version 2.1 of the License, or (at your option) any later version.    *
00010  *                                                                         *
00011  *   This library is distributed in the hope that it will be useful,       *
00012  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
00013  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *
00014  *   Lesser General Public License for more details.                       *
00015  *                                                                         *
00016  *   You should have received a copy of the GNU Lesser General Public      *
00017  *   License along with this library; if not, write to the                 *
00018  *   Free Software Foundation, Inc.,                                       *
00019  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
00020  ***************************************************************************/
00021 
00022 #ifndef FIFE_VIDEO_RENDERBACKENDS_OPENGL_GLIMAGE_H
00023 #define FIFE_VIDEO_RENDERBACKENDS_OPENGL_GLIMAGE_H
00024 
00025 // Standard C++ library includes
00026 #include <vector>
00027 
00028 // Platform specific includes
00029 #include "util/base/fife_stdint.h"
00030 
00031 // 3rd party library includes
00032 #include <SDL_video.h>
00033 
00034 // FIFE includes
00035 // These includes are split up in two parts, separated by one empty line
00036 // First block: files included from the FIFE root src directory
00037 // Second block: files included from the same folder
00038 #include "video/image.h"
00039 
00040 #include "fife_opengl.h"
00041 
00042 namespace FIFE {
00043     // FIXME: due to image chunking issues, GLImage uses SDLImage to draw primitives on its surface
00044     // remember though that OpenGL backend is not separate thing of SDL; instead it sits on top of it
00045     class SDLImage;
00046 
00047 
00058     class GLImage : public Image {
00059     public:
00060         GLImage(SDL_Surface* surface);
00061         GLImage(const uint8_t* data, unsigned int width, unsigned int height);
00062         virtual ~GLImage();
00063         void render(const Rect& rect, SDL_Surface* dst, unsigned char alpha = 255);
00064         void saveImage(const std::string& filename);
00065         bool putPixel(int x, int y, int r, int g, int b);
00066         void drawLine(const Point& p1, const Point& p2, int r, int g, int b);
00067         void drawQuad(const Point& p1, const Point& p2, const Point& p3, const Point& p4,  int r, int g, int b);
00068         void drawVertex(const Point& p, const uint8_t size, int r, int g, int b);
00069 
00070     protected:
00071         void setClipArea(const Rect& cliparea, bool clear);
00072 
00073     private:
00074         // number of rows into which this image is sliced, so that it "becomes power of 2 compatible"
00075         unsigned int m_rows;
00076         // see m_rows
00077         unsigned int m_cols;
00078 
00079         // ratio of texture fill in last column. E.g. in case image width = 300, chunk = 256x256,
00080         // last column chunk width = 64 -> ratio is (300-256) / 64 = 0.6875
00081         // this means that texture fills 68.75% the last column
00082         float m_last_col_fill_ratio;
00083         // @see m_last_col_fill_ratio
00084         float m_last_row_fill_ratio;
00085 
00089         unsigned int m_last_col_width;
00090         // see m_last_col_width
00091         unsigned int m_last_row_height;
00092 
00095         GLuint* m_textureids;
00096 
00099         void cleanup();
00100 
00103         void resetGlimage();
00104 
00105         //void saveAsPng(const std::string& filename, SDL_Surface& surface);
00106 
00110         void generateTextureChunks();
00111 
00119         SDLImage* m_sdlimage;
00120 
00121         unsigned int m_chunk_size;
00122         SDL_Color m_colorkey;
00123     };
00124 }
00125 
00126 #endif
00127 /* vim: set noexpandtab: set shiftwidth=2: set tabstop=2: */