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annotate engine/core/video/image.h @ 697:ecaa4d98f05f tip

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Abstracted the GUI code and refactored the GUIChan-specific code into its own module. * Most of the GUIChan code has been refactored into its own gui/guichan module. However, references to the GuiFont class still persist in the Engine and GuiManager code and these will need further refactoring. * GuiManager is now an abstract base class which specific implementations (e.g. GUIChan) should subclass. * The GUIChan GUI code is now a concrete implementation of GuiManager, most of which is in the new GuiChanGuiManager class. * The GUI code in the Console class has been refactored out of the Console and into the GUIChan module as its own GuiChanConsoleWidget class. The rest of the Console class related to executing commands was left largely unchanged. * Existing client code may need to downcast the GuiManager pointer received from FIFE::Engine::getGuiManager() to GuiChanGuiManager, since not all functionality is represented in the GuiManager abstract base class. Python client code can use the new GuiChanGuiManager.castTo static method for this purpose.
author M. George Hansen <technopolitica@gmail.com>
date Sat, 18 Jun 2011 00:28:40 -1000
parents e3140f01749d
children
rev   line source
0
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1 /***************************************************************************
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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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4 * This file is part of FIFE. *
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5 * *
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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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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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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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22 #ifndef FIFE_VIDEO_IMAGE_H
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23 #define FIFE_VIDEO_IMAGE_H
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24
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25 // Standard C++ library includes
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26 #include <stack>
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27
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28 // 3rd party library includes
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29 #include <SDL.h>
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30 #include <png.h>
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31
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32 // FIFE includes
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33 // These includes are split up in two parts, separated by one empty line
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34 // First block: files included from the FIFE root src directory
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35 // Second block: files included from the same folder
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36 #include "util/base/fife_stdint.h"
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37 #include "util/base/resourceclass.h"
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38 #include "util/resource/resource.h"
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39 #include "util/structures/point.h"
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40 #include "util/structures/rect.h"
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41
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42 namespace FIFE {
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44 class AbstractImage {
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45 public:
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46 virtual ~AbstractImage() {}
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48 /** Get the surface used by this image
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49 * @return pointer to used surface
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50 */
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51 virtual SDL_Surface* getSurface() = 0;
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53 /** Returns the @b maximum width occupied by this image.
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54 * This should return the maximum width that could be covered by the
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55 * image.
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56 */
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57 virtual unsigned int getWidth() const = 0;
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58
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59 /** Returns the @b maximum height occupied by this image.
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60 */
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61 virtual unsigned int getHeight() const = 0;
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0
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63 /** Gets the area of the image
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64 * @return Image area in rect
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65 */
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66 virtual const Rect& getArea() = 0;
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67
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68 /** Writes pixel to given position. Returns true, if pixel was written (not out of bounds)
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69 */
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70 virtual bool putPixel(int x, int y, int r, int g, int b, int a = 255) = 0;
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72 /** Draws line between given points with given RGBA
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73 */
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74 virtual void drawLine(const Point& p1, const Point& p2, int r, int g, int b, int a = 255) = 0;
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76 /** Draws triangle between given points with given RGBA
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77 */
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78 virtual void drawTriangle(const Point& p1, const Point& p2, const Point& p3, int r, int g, int b, int a = 255) = 0;
0
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79
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80 /** Draws an axis parallel rectangle.
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81 */
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82 virtual void drawRectangle(const Point& p, uint16_t w, uint16_t h, uint8_t r, uint8_t g, uint8_t b, uint8_t a = 255) = 0;
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83
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84 /** Draws a filled axis parallel rectangle.
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85 */
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86 virtual void fillRectangle(const Point& p, uint16_t w, uint16_t h, uint8_t r, uint8_t g, uint8_t b, uint8_t a = 255) = 0;
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87
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88 /** Draws quad between given points with given RGBA
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89 */
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90 virtual void drawQuad(const Point& p1, const Point& p2, const Point& p3, const Point& p4, int r, int g, int b, int a = 255) = 0;
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91
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92 /** Draws a quad that represents a vertex with given RGBA
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93 */
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94 virtual void drawVertex(const Point& p, const uint8_t size, int r, int g, int b, int a = 255) = 0;
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95
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96 /** Draws a light primitive that based on a triangle fan
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97 */
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98 virtual void drawLightPrimitive(const Point& p, uint8_t intensity, float radius, int subdivisions, float xstretch, float ystretch, uint8_t red, uint8_t green, uint8_t blue) = 0;
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99
0
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100 /** Returns pixel RGBA values from given position
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101 */
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102 virtual void getPixelRGBA(int x, int y, uint8_t* r, uint8_t* g, uint8_t* b, uint8_t* a) = 0;
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103
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104 /** Pushes clip area to clip stack
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105 * Clip areas define which area is drawn on screen. Usable e.g. with viewports
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106 * note that previous items in stack do not affect the latest area pushed
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107 */
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108 virtual void pushClipArea(const Rect& cliparea, bool clear=true) = 0;
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109
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110 /** Pops clip area from clip stack
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111 * @see pushClipArea
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112 */
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113 virtual void popClipArea() = 0;
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114
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115 /** Gets the current clip area
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116 * @see pushClipArea
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117 */
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118 virtual const Rect& getClipArea() const = 0;
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119
0
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120 /** Saves the image using given filename
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121 */
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122 virtual void saveImage(const std::string& filename) = 0;
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123
0
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124 /** Enable or disable the alpha 'optimizing' code
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125 *
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126 * @param optimize Wether the image shall be analysed for 'fake' alpha images.
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127 * Only implemented by and useful for the SDL backend at the moment.
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128 */
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129 virtual void setAlphaOptimizerEnabled(bool enabled) = 0;
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130
0
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131 /** @see setAlphaOptimizerEnabled
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132 */
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133 virtual bool isAlphaOptimizerEnabled() = 0;
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134 };
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135
0
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136 /** Base Class for Images.
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137 */
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138 class Image : public ResourceClass, public AbstractImage {
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139 public:
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140 /** Constructor.
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141 * @note Takes ownership of the SDL Surface
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142 * @param surface SDL Surface in RGBA format
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143 */
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144 Image(SDL_Surface* surface);
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145
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146 /** Constructor
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147 * @param data Pointer to the imagedata (needs to be in RGBA, 8 bits per channel).
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148 * @param width Width of the image.
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149 * @param height Height of the image.
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150 */
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151 Image(const uint8_t* data, unsigned int width, unsigned int height);
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152
654
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153 /** Invalidates the Image causing it to be reset or re-loaded
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154 */
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155 virtual void invalidate() = 0;
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156
0
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157 /** Renders itself to the Destination surface at the rectangle rect.
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158 *
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159 * @param rect The position and clipping where to draw this image to.
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160 * @param target Target surface to draw to, e.g. main screen or other image
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161 * @param alpha The alpha value, with which to draw self. opaque by default.
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162 */
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163 virtual void render(const Rect& rect, SDL_Surface* dst, unsigned char alpha = 255) = 0;
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164
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165 /** Renders itself to the main screen at the rectangle rect.
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166 * Convenience function
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167 * @param rect The position and clipping where to draw this image to.
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168 * @param alpha The alpha value, with which to draw self.
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169 */
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170 void render(const Rect& rect, unsigned char alpha = 255);
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171
0
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172 /** Removes underlying SDL_Surface from the image (if exists) and returns this
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173 * @note this effectively causes SDL_Surface not to be freed on destruction
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174 */
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175 SDL_Surface* detachSurface();
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176
0
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177 virtual ~Image();
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178 SDL_Surface* getSurface() { return m_surface; }
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179 unsigned int getWidth() const;
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180 unsigned int getHeight() const;
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181 const Rect& getArea();
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182 void setXShift(int xshift);
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183 inline int getXShift() const {
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184 return m_xshift;
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185 }
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186 void setYShift(int yshift);
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187 inline int getYShift() const {
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188 return m_yshift;
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189 }
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190 void getPixelRGBA(int x, int y, uint8_t* r, uint8_t* g, uint8_t* b, uint8_t* a);
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191 void pushClipArea(const Rect& cliparea, bool clear=true);
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192 void popClipArea();
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193 const Rect& getClipArea() const;
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194 void setAlphaOptimizerEnabled(bool enabled) { m_isalphaoptimized = enabled; }
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195 bool isAlphaOptimizerEnabled() { return m_isalphaoptimized; }
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196
0
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197 protected:
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198 /** Sets given clip area into image
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199 * @see pushClipArea
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200 */
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201 virtual void setClipArea(const Rect& cliparea, bool clear) = 0;
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202 //saves images to png format
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203 virtual void saveAsPng(const std::string& filename, SDL_Surface& surface);
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204 /** Clears any possible clip areas
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205 * @see pushClipArea
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206 */
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207 virtual void clearClipArea();
430
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208
0
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209 // The SDL Surface used.
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210 SDL_Surface* m_surface;
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211 // The X shift of the Image
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212 int m_xshift;
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213 // The Y shift of the Image
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214 int m_yshift;
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215
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216 class ClipInfo {
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217 public:
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218 Rect r;
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219 bool clearing;
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220 };
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221 std::stack<ClipInfo> m_clipstack;
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222
0
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223 // image area
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224 Rect m_area;
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225 bool m_isalphaoptimized;
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226
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227 private:
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228 void reset(SDL_Surface* surface);
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229 };
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230
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231 }
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232
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233 #endif