Mercurial > fife-parpg

annotate engine/core/video/image.h @ 546:8fee2d2286e9

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Rewrote the object serializing routines to use a "template" idea for loading an object from disk. This allows for multiple objects to load the same base object template but be unique on the scene AND have different values. Useful for say more than one gold stack on the ground with different gold values. TODO: fix the "spawn" console command.
author prock@33b003aa-7bff-0310-803a-e67f0ece8222
date Thu, 03 Jun 2010 21:35:06 +0000
parents ad1f09d954f9
children 47b49b9b0c0a
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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21
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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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43 class Rect;
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44
0
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45 class AbstractImage {
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46 public:
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47 virtual ~AbstractImage() {}
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49 /** Get the surface used by this image
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50 * @return pointer to used surface
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51 */
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52 virtual SDL_Surface* getSurface() = 0;
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53
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54 /** Returns the @b maximum width occupied by this image.
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55 * This should return the maximum width that could be covered by the
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56 * image.
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57 */
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58 virtual unsigned int getWidth() const = 0;
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59
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60 /** Returns the @b maximum height occupied by this image.
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61 */
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62 virtual unsigned int getHeight() const = 0;
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63
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64 /** Gets the area of the image
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65 * @return Image area in rect
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66 */
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67 virtual const Rect& getArea() = 0;
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68
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69 /** Writes pixel to given position. Returns true, if pixel was written (not out of bounds)
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70 */
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71 virtual bool putPixel(int x, int y, int r, int g, int b) = 0;
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73 /** Draws line between given points with given RGBA
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74 */
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75 virtual void drawLine(const Point& p1, const Point& p2, int r, int g, int b) = 0;
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76
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77 /** Draws quad between given points with given RGBA
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78 */
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79 virtual void drawQuad(const Point& p1, const Point& p2, const Point& p3, const Point& p4, int r, int g, int b) = 0;
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80
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81 /** Draws a quad that represents a vertex with given RGBA
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82 */
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83 virtual void drawVertex(const Point& p, const uint8_t size, int r, int g, int b) = 0;
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84
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85 /** Returns pixel RGBA values from given position
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86 */
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87 virtual void getPixelRGBA(int x, int y, uint8_t* r, uint8_t* g, uint8_t* b, uint8_t* a) = 0;
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88
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89 /** Pushes clip area to clip stack
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90 * Clip areas define which area is drawn on screen. Usable e.g. with viewports
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91 * note that previous items in stack do not affect the latest area pushed
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92 */
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93 virtual void pushClipArea(const Rect& cliparea, bool clear=true) = 0;
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94
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95 /** Pops clip area from clip stack
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96 * @see pushClipArea
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97 */
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98 virtual void popClipArea() = 0;
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99
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100 /** Gets the current clip area
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101 * @see pushClipArea
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102 */
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103 virtual const Rect& getClipArea() const = 0;
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104
0
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105 /** Saves the image using given filename
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106 */
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107 virtual void saveImage(const std::string& filename) = 0;
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108
0
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109 /** Enable or disable the alpha 'optimizing' code
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110 *
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111 * @param optimize Wether the image shall be analysed for 'fake' alpha images.
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112 * Only implemented by and useful for the SDL backend at the moment.
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113 */
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114 virtual void setAlphaOptimizerEnabled(bool enabled) = 0;
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115
0
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116 /** @see setAlphaOptimizerEnabled
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117 */
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118 virtual bool isAlphaOptimizerEnabled() = 0;
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119 };
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120
0
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121 /** Base Class for Images.
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122 */
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123 class Image : public ResourceClass, public AbstractImage {
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124 public:
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125 /** Constructor.
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126 * @note Takes ownership of the SDL Surface
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127 * @param surface SDL Surface in RGBA format
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128 */
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129 Image(SDL_Surface* surface);
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130
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131 /** Constructor
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132 * @param data Pointer to the imagedata (needs to be in RGBA, 8 bits per channel).
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133 * @param width Width of the image.
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134 * @param height Height of the image.
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135 */
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136 Image(const uint8_t* data, unsigned int width, unsigned int height);
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137
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138 /** Renders itself to the Destination surface at the rectangle rect.
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139 *
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140 * @param rect The position and clipping where to draw this image to.
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141 * @param target Target surface to draw to, e.g. main screen or other image
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142 * @param alpha The alpha value, with which to draw self. opaque by default.
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143 */
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144 virtual void render(const Rect& rect, SDL_Surface* dst, unsigned char alpha = 255) = 0;
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145
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146 /** Renders itself to the main screen at the rectangle rect.
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147 * Convenience function
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148 * @param rect The position and clipping where to draw this image to.
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149 * @param alpha The alpha value, with which to draw self.
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150 */
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151 void render(const Rect& rect, unsigned char alpha = 255);
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152
0
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153 /** Removes underlying SDL_Surface from the image (if exists) and returns this
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154 * @note this effectively causes SDL_Surface not to be freed on destruction
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155 */
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156 SDL_Surface* detachSurface();
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157
0
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158 virtual ~Image();
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159 SDL_Surface* getSurface() { return m_surface; }
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160 unsigned int getWidth() const;
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161 unsigned int getHeight() const;
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162 const Rect& getArea();
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163 void setXShift(int xshift);
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164 inline int getXShift() const {
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165 return m_xshift;
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166 }
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167 void setYShift(int yshift);
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168 inline int getYShift() const {
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169 return m_yshift;
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170 }
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171 void getPixelRGBA(int x, int y, uint8_t* r, uint8_t* g, uint8_t* b, uint8_t* a);
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172 void pushClipArea(const Rect& cliparea, bool clear=true);
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173 void popClipArea();
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174 const Rect& getClipArea() const;
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175 void setAlphaOptimizerEnabled(bool enabled) { m_isalphaoptimized = enabled; }
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176 bool isAlphaOptimizerEnabled() { return m_isalphaoptimized; }
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177
0
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178 protected:
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179 /** Sets given clip area into image
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180 * @see pushClipArea
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181 */
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182 virtual void setClipArea(const Rect& cliparea, bool clear) = 0;
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183 //saves images to png format
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184 virtual void saveAsPng(const std::string& filename, SDL_Surface& surface);
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185 /** Clears any possible clip areas
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186 * @see pushClipArea
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187 */
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188 virtual void clearClipArea();
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189
0
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190 // The SDL Surface used.
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191 SDL_Surface* m_surface;
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192 // The X shift of the Image
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193 int m_xshift;
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194 // The Y shift of the Image
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195 int m_yshift;
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196
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197 class ClipInfo {
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198 public:
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199 Rect r;
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200 bool clearing;
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201 };
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202 std::stack<ClipInfo> m_clipstack;
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203
0
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204 // image area
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205 Rect m_area;
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206 bool m_isalphaoptimized;
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207
0
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208 private:
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209 void reset(SDL_Surface* surface);
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210 };
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211
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212 }
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213
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214 #endif