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annotate engine/core/video/opengl/glimage.h @ 430:ad1f09d954f9

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Added the ability to render a vertex on the screen. The vertex is represented by a small square. fixes[t:455]
author prock@33b003aa-7bff-0310-803a-e67f0ece8222
date Tue, 23 Feb 2010 19:25:59 +0000
parents ad7969d9460b
children 47b49b9b0c0a
rev   line source
0
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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1 /***************************************************************************
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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2 * Copyright (C) 2005-2008 by the FIFE team *
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3 * http://www.fifengine.de *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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4 * This file is part of FIFE. *
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5 * *
46
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6 * FIFE is free software; you can redistribute it and/or *
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7 * modify it under the terms of the GNU Lesser General Public *
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8 * License as published by the Free Software Foundation; either *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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9 * version 2.1 of the License, or (at your option) any later version. *
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10 * *
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11 * This library is distributed in the hope that it will be useful, *
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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14 * Lesser General Public License for more details. *
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15 * *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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16 * You should have received a copy of the GNU Lesser General Public *
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17 * License along with this library; if not, write to the *
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18 * Free Software Foundation, Inc., *
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19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
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20 ***************************************************************************/
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21
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22 #ifndef FIFE_VIDEO_RENDERBACKENDS_OPENGL_GLIMAGE_H
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23 #define FIFE_VIDEO_RENDERBACKENDS_OPENGL_GLIMAGE_H
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24
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25 // Standard C++ library includes
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26 #include <vector>
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27
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28 // Platform specific includes
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29 #include "util/base/fife_stdint.h"
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30
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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31 // 3rd party library includes
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ad7969d9460b A client can now specify a global color key to be used with all images. The default color key is (255,0,255) in RGB format. Also the client can enable/disable the color key feature by using the setColorKeyEnabled function in the EngineSettings class. By default the color key feature is disabled. fixes[t:451]
vtchill@33b003aa-7bff-0310-803a-e67f0ece8222
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32 #include <SDL_video.h>
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33
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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34 // FIFE includes
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35 // These includes are split up in two parts, separated by one empty line
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36 // First block: files included from the FIFE root src directory
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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37 // Second block: files included from the same folder
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38 #include "video/image.h"
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39
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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40 #include "fife_opengl.h"
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41
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42 namespace FIFE {
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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43 // FIXME: due to image chunking issues, GLImage uses SDLImage to draw primitives on its surface
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44 // remember though that OpenGL backend is not separate thing of SDL; instead it sits on top of it
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45 class SDLImage;
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46
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47
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48 /** Implements an Image using OpenGL.
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49 *
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50 * This class contains a texture handle bound to the data given to the constructor;
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51 * it draws a textured @i Quad to the screen.
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52 *
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53 * @see Image
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54 * @note Width and height are not limited to powers of two; non-power of two
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55 * images will be converted internally.
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56 * @todo Check the correctness of the generateTexture function on big endian systems (ppc)
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57 */
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58 class GLImage : public Image {
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59 public:
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60 GLImage(SDL_Surface* surface);
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61 GLImage(const uint8_t* data, unsigned int width, unsigned int height);
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62 virtual ~GLImage();
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63 void render(const Rect& rect, SDL_Surface* dst, unsigned char alpha = 255);
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64 void saveImage(const std::string& filename);
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65 bool putPixel(int x, int y, int r, int g, int b);
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66 void drawLine(const Point& p1, const Point& p2, int r, int g, int b);
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67 void drawQuad(const Point& p1, const Point& p2, const Point& p3, const Point& p4, int r, int g, int b);
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ad1f09d954f9 Added the ability to render a vertex on the screen. The vertex is represented by a small square. fixes[t:455]
prock@33b003aa-7bff-0310-803a-e67f0ece8222
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68 void drawVertex(const Point& p, const uint8_t size, int r, int g, int b);
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69
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70 protected:
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71 void setClipArea(const Rect& cliparea, bool clear);
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72
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73 private:
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74 // number of rows into which this image is sliced, so that it "becomes power of 2 compatible"
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75 unsigned int m_rows;
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76 // see m_rows
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77 unsigned int m_cols;
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78
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79 // ratio of texture fill in last column. E.g. in case image width = 300, chunk = 256x256,
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80 // last column chunk width = 64 -> ratio is (300-256) / 64 = 0.6875
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81 // this means that texture fills 68.75% the last column
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82 float m_last_col_fill_ratio;
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83 // @see m_last_col_fill_ratio
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84 float m_last_row_fill_ratio;
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85
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ad1f09d954f9 Added the ability to render a vertex on the screen. The vertex is represented by a small square. fixes[t:455]
prock@33b003aa-7bff-0310-803a-e67f0ece8222
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86 /** the width of last column to render. This is also power of two
0
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87 * (e.g. if chunks are 256x256 and image width = 300, last column = 64
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88 */
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89 unsigned int m_last_col_width;
430
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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90 // see m_last_col_width
0
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91 unsigned int m_last_row_height;
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92
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93 /** Holds texture ids that are used to access textures in GL rendering context
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94 */
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95 GLuint* m_textureids;
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96
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97 /** Frees allocated memory and calls resetGlImage
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98 */
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99 void cleanup();
430
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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100
0
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101 /** Resets GLImage variables
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102 */
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103 void resetGlimage();
430
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104
0
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105 //void saveAsPng(const std::string& filename, SDL_Surface& surface);
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106
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107 /** Generates chunks for render. For reference, see
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108 * http://developer.apple.com/documentation/GraphicsImaging/Conceptual/OpenGL-MacProgGuide/opengl_texturedata/chapter_10_section_4.html
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109 */
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110 void generateTextureChunks();
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ad1f09d954f9 Added the ability to render a vertex on the screen. The vertex is represented by a small square. fixes[t:455]
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111
0
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112 /** Original SDLImage where GLImage is created from
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113 * FIXME: at the moment SDLImage is used to draw graphics (e.g. line) on screen
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114 * this is clearly not optimal, but image chunking makes somewhat harder to do
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115 * proper drawing of graphics (e.g. how to segment lines into correct boxes).
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116 * It might be possible to use some kind of offscreen OpenGL image for this
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117 * purpose
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118 */
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119 SDLImage* m_sdlimage;
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120
0
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121 unsigned int m_chunk_size;
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ad7969d9460b A client can now specify a global color key to be used with all images. The default color key is (255,0,255) in RGB format. Also the client can enable/disable the color key feature by using the setColorKeyEnabled function in the EngineSettings class. By default the color key feature is disabled. fixes[t:451]
vtchill@33b003aa-7bff-0310-803a-e67f0ece8222
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122 SDL_Color m_colorkey;
0
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123 };
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124 }
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125
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126 #endif
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127 /* vim: set noexpandtab: set shiftwidth=2: set tabstop=2: */