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annotate ext/guichan-0.8.1/include/guichan/graphics.hpp @ 115:c94c76346027

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* Key event fix for map editor by chewie
author mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
date Mon, 28 Jul 2008 23:53:03 +0000
parents 4a0efb7baf70
children
rev   line source
0
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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1 /* _______ __ __ __ ______ __ __ _______ __ __
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2 * / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___ /\ / |\/ /\
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3 * / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
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4 * / / /__ / / // / // / // / / / ___ / // ___ / // /| ' / /
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5 * / /_// /\ / /_// / // / // /_/_ / / // / // /\_/ / // / | / /
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6 * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
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7 * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
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8 *
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9 * Copyright (c) 2004 - 2008 Olof Naessén and Per Larsson
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10 *
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11 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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12 * Per Larsson a.k.a finalman
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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13 * Olof Naessén a.k.a jansem/yakslem
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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14 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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15 * Visit: http://guichan.sourceforge.net
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16 *
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17 * License: (BSD)
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18 * Redistribution and use in source and binary forms, with or without
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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19 * modification, are permitted provided that the following conditions
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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20 * are met:
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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21 * 1. Redistributions of source code must retain the above copyright
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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22 * notice, this list of conditions and the following disclaimer.
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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23 * 2. Redistributions in binary form must reproduce the above copyright
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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24 * notice, this list of conditions and the following disclaimer in
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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25 * the documentation and/or other materials provided with the
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26 * distribution.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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27 * 3. Neither the name of Guichan nor the names of its contributors may
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
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28 * be used to endorse or promote products derived from this software
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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29 * without specific prior written permission.
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30 *
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31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
4a0efb7baf70 * Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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35 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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36 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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37 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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38 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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39 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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40 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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41 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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42 */
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43
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44 #ifndef GCN_GRAPHICS_HPP
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45 #define GCN_GRAPHICS_HPP
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46
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47 #include <iosfwd>
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48 #include <stack>
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49
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50 #include "guichan/cliprectangle.hpp"
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51 #include "guichan/platform.hpp"
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52
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53 namespace gcn
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54 {
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55 class Color;
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56 class Font;
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57 class Image;
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58
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59 /**
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60 * Abstract class for providing drawing primitve functions.
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61 * It contains all vital functions for drawing.
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62 *
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63 * Guichan contains implementations of Graphics for common
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64 * libraries like the Allegro library, the HGE library,
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65 * the OpenGL library, the OpenLayer library, and the SDL library.
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66 * To make Guichan usable with other libraries, a Graphics class
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67 * must be implemented.
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68 *
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69 * In Graphics you can set clip areas to limit drawing to certain
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70 * areas of the screen. Clip areas are put on a stack, which
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71 * means that you can push smaller and smaller clip areas onto the
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72 * stack. All coordinates will be relative to the top most clip area.
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73 * In most cases you won't have to worry about the clip areas,
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74 * unless you want to implement some really complex widget.
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75 * Pushing and poping of clip areas are handled automatically by
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76 * container widgets when their child widgets are drawn.
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77 *
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78 * IMPORTANT: Remember to pop each clip area that you pushed on the stack
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79 * after you are done with it.
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80 *
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81 * If you feel that Graphics is to restrictive for your needs,
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82 * there is no one stopping you from using your own code for drawing
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83 * in widgets. You could for instance use pure SDL in the drawing of
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84 * widgets bypassing Graphics. This might however hurt portability of
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85 * your application.
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86 *
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87 * If you implement a Graphics class not present in Guichan we would
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88 * be very happy to add it to Guichan.
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89 *
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90 * @see AllegroGraphics, HGEGraphics, OpenLayerGraphics, OpenGLGraphics,
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91 * SDLGraphics, Image
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92 * @since 0.1.0
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93 */
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94 class GCN_CORE_DECLSPEC Graphics
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95 {
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96 public:
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97 /**
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98 * Alignments for text drawing.
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99 */
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100 enum Alignment
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101 {
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102 LEFT = 0,
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103 CENTER,
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104 RIGHT
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105 };
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106
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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107 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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108 * Constructor.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
109 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
110 Graphics();
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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111
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
112 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
113 * Destructor.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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114 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
115 virtual ~Graphics() { }
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116
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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117 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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118 * Initializes drawing. Called by the Gui when Gui::draw() is called.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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119 * It is needed by some implementations of Graphics to perform
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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120 * preparations before drawing. An example of such an implementation
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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121 * is the OpenGLGraphics.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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122 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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123 * NOTE: You will never need to call this function yourself, unless
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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124 * you use a Graphics object outside of Guichan.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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125 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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126 * @see _endDraw, Gui::draw
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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127 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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128 virtual void _beginDraw() { }
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129
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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130 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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131 * Deinitializes drawing. Called by the Gui when a Gui::draw() is done.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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132 * done. It should reset any state changes made by _beginDraw().
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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133 *
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134 * NOTE: You will never need to call this function yourself, unless
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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135 * you use a Graphics object outside of Guichan.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
136 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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137 * @see _beginDraw, Gui::draw
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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138 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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139 virtual void _endDraw() { }
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140
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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141 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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142 * Pushes a clip area onto the stack. The x and y coordinates in the
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
143 * rectangle is relative to the last pushed clip area.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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144 * If the new area falls outside the current clip area, it will be
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
145 * clipped as necessary.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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146 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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147 * If a clip area is outside of the top clip area a clip area with
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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148 * zero width and height will be pushed.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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149 *
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150 * @param area The clip area to be pushed onto the stack.
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151 * @return False if the the new area lays outside the current clip
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
152 * area.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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153 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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154 virtual bool pushClipArea(Rectangle area);
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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155
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
156 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
157 * Removes the top most clip area from the stack.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
158 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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159 * @throws Exception if the stack is empty.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
160 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
161 virtual void popClipArea();
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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162
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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163 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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164 * Gets the current clip area. Usefull if you want to do drawing
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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165 * bypassing Graphics.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
166 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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167 * @return The current clip area.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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168 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
169 virtual const ClipRectangle& getCurrentClipArea();
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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170
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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171 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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172 * Draws a part of an image.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
173 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
174 * NOTE: Width and height arguments will not scale the image but
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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175 * specifies the size of the part to be drawn. If you want
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
176 * to draw the whole image there is a simplified version of
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
177 * this function.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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178 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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179 * EXAMPLE: @code drawImage(myImage, 10, 10, 20, 20, 40, 40); @endcode
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180 * Will draw a rectangular piece of myImage starting at
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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181 * coordinate (10, 10) in myImage, with width and height 40.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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182 * The piece will be drawn with it's top left corner at
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
183 * coordinate (20, 20).
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
184 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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185 * @param image The image to draw.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
186 * @param srcX The source image x coordinate.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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187 * @param srcY The source image y coordinate.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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188 * @param dstX The destination x coordinate.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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189 * @param dstY The destination y coordinate.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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190 * @param width The width of the piece.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
191 * @param height The height of the piece.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
192 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
193 virtual void drawImage(const Image* image,
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
194 int srcX,
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
195 int srcY,
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
196 int dstX,
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
197 int dstY,
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
198 int width,
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
199 int height) = 0;
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
200 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
201 * Draws an image. A simplified version of the other drawImage.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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202 * It will draw a whole image at the coordinate you specify.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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203 * It is equivalent to calling:
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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204 * @code drawImage(myImage, 0, 0, dstX, dstY, image->getWidth(), \
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
205 image->getHeight()); @endcode
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
206 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
207 virtual void drawImage(const Image* image, int dstX, int dstY);
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
208
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
209 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
210 * Draws a single point/pixel.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
211 *
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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212 * @param x The x coordinate.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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213 * @param y The y coordinate.
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
214 */
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
215 virtual void drawPoint(int x, int y) = 0;
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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216
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
217 /**
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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218 * Ddraws a line.
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219 *
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220 * @param x1 The first x coordinate.
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221 * @param y1 The first y coordinate.
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222 * @param x2 The second x coordinate.
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223 * @param y2 The second y coordinate.
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224 */
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225 virtual void drawLine(int x1, int y1, int x2, int y2) = 0;
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226
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227 /**
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228 * Draws a simple, non-filled, rectangle with a one pixel width.
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229 *
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230 * @param rectangle The rectangle to draw.
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231 */
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232 virtual void drawRectangle(const Rectangle& rectangle) = 0;
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233
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234 /**
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235 * Draws a filled rectangle.
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236 *
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237 * @param rectangle The filled rectangle to draw.
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238 */
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239 virtual void fillRectangle(const Rectangle& rectangle) = 0;
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240
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241 /**
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242 * Sets the color to use when drawing.
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243 *
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244 * @param color A color.
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245 * @see getColor
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246 */
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247 virtual void setColor(const Color& color) = 0;
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248
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249 /**
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250 * Gets the color to use when drawing.
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251 *
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252 * @return The color used when drawing.
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253 * @see setColor
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254 */
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255 virtual const Color& getColor() const = 0;
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256
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257 /**
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258 * Sets the font to use when drawing text.
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259 *
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260 * @param font The font to use when drawing.
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261 */
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262 virtual void setFont(Font* font);
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263
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264 /**
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265 * Draws text.
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266 *
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267 * @param text The text to draw.
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268 * @param x The x coordinate where to draw the text.
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269 * @param y The y coordinate where to draw the text.
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270 * @param alignment The alignemnt to use when drawing.
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271 * @throws Exception when no font has been set.
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272 */
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273 virtual void drawText(const std::string& text,
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274 int x,
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275 int y,
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276 Alignment alignment = LEFT);
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277
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278 protected:
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279 /**
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280 * Holds the clip area stack.
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281 */
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282 std::stack<ClipRectangle> mClipStack;
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283
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284 /**
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285 * Holds the current font.
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286 */
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287 Font* mFont;
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288 };
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289 }
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290
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291 #endif // end GCN_GRAPHICS_HPP