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comparison ext/guichan-0.8.1/src/graphics.cpp @ 0:4a0efb7baf70

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* Datasets becomes the new trunk and retires after that :-)
author mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
date Sun, 29 Jun 2008 18:44:17 +0000
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-1:000000000000 0:4a0efb7baf70
1 /* _______ __ __ __ ______ __ __ _______ __ __
2 * / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___ /\ / |\/ /\
3 * / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
4 * / / /__ / / // / // / // / / / ___ / // ___ / // /| ' / /
5 * / /_// /\ / /_// / // / // /_/_ / / // / // /\_/ / // / | / /
6 * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
7 * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
8 *
9 * Copyright (c) 2004 - 2008 Olof Naessén and Per Larsson
10 *
11 *
12 * Per Larsson a.k.a finalman
13 * Olof Naessén a.k.a jansem/yakslem
14 *
15 * Visit: http://guichan.sourceforge.net
16 *
17 * License: (BSD)
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
20 * are met:
21 * 1. Redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer.
23 * 2. Redistributions in binary form must reproduce the above copyright
24 * notice, this list of conditions and the following disclaimer in
25 * the documentation and/or other materials provided with the
26 * distribution.
27 * 3. Neither the name of Guichan nor the names of its contributors may
28 * be used to endorse or promote products derived from this software
29 * without specific prior written permission.
30 *
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
36 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
37 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
38 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
39 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
40 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
41 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 */
43
44 /*
45 * For comments regarding functions please see the header file.
46 */
47
48 #include "guichan/graphics.hpp"
49
50 #include "guichan/exception.hpp"
51 #include "guichan/font.hpp"
52 #include "guichan/image.hpp"
53
54 namespace gcn
55 {
56
57 Graphics::Graphics()
58 {
59 mFont = NULL;
60 }
61
62 bool Graphics::pushClipArea(Rectangle area)
63 {
64 if (mClipStack.empty())
65 {
66 ClipRectangle carea;
67 carea.x = area.x;
68 carea.y = area.y;
69 carea.width = area.width;
70 carea.height = area.height;
71 carea.xOffset = area.x;
72 carea.yOffset = area.y;
73 mClipStack.push(carea);
74 return true;
75 }
76
77 const ClipRectangle &top = mClipStack.top();
78 ClipRectangle carea;
79 carea = area;
80 carea.xOffset = top.xOffset + carea.x;
81 carea.yOffset = top.yOffset + carea.y;
82 carea.x += top.xOffset;
83 carea.y += top.yOffset;
84
85 // Clamp the pushed clip rectangle.
86 if (carea.x < top.x)
87 {
88 carea.x = top.x;
89 }
90
91 if (carea.y < top.y)
92 {
93 carea.y = top.y;
94 }
95
96 if (carea.x + carea.width > top.x + top.width)
97 {
98 carea.width = top.x + top.width - carea.x;
99
100 if (carea.width < 0)
101 {
102 carea.width = 0;
103 }
104 }
105
106 if (carea.y + carea.height > top.y + top.height)
107 {
108 carea.height = top.y + top.height - carea.y;
109
110 if (carea.height < 0)
111 {
112 carea.height = 0;
113 }
114 }
115
116 bool result = carea.isIntersecting(top);
117
118 mClipStack.push(carea);
119
120 return result;
121 }
122
123 void Graphics::popClipArea()
124 {
125
126 if (mClipStack.empty())
127 {
128 throw GCN_EXCEPTION("Tried to pop clip area from empty stack.");
129 }
130
131 mClipStack.pop();
132 }
133
134 const ClipRectangle& Graphics::getCurrentClipArea()
135 {
136 if (mClipStack.empty())
137 {
138 throw GCN_EXCEPTION("The clip area stack is empty.");
139 }
140
141 return mClipStack.top();
142 }
143
144 void Graphics::drawImage(const Image* image, int dstX, int dstY)
145 {
146 drawImage(image, 0, 0, dstX, dstY, image->getWidth(), image->getHeight());
147 }
148
149 void Graphics::setFont(Font* font)
150 {
151 mFont = font;
152 }
153
154 void Graphics::drawText(const std::string& text, int x, int y,
155 Alignment alignment)
156 {
157 if (mFont == NULL)
158 {
159 throw GCN_EXCEPTION("No font set.");
160 }
161
162 switch (alignment)
163 {
164 case LEFT:
165 mFont->drawString(this, text, x, y);
166 break;
167 case CENTER:
168 mFont->drawString(this, text, x - mFont->getWidth(text) / 2, y);
169 break;
170 case RIGHT:
171 mFont->drawString(this, text, x - mFont->getWidth(text), y);
172 break;
173 default:
174 throw GCN_EXCEPTION("Unknown alignment.");
175 }
176 }
177 }