Mercurial > fife-parpg

comparison ext/guichan-0.8.2/src/graphics.cpp @ 378:64738befdf3b

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bringing in the changes from the build_system_rework branch in preparation for the 0.3.0 release. This commit will require the Jan2010 devkit. Clients will also need to be modified to the new way to import fife.
author vtchill@33b003aa-7bff-0310-803a-e67f0ece8222
date Mon, 11 Jan 2010 23:34:52 +0000
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377:fe6fb0e0ed23 378:64738befdf3b
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 // Ignore area with a negate width or height
65 // by simple pushing an empty clip area
66 // to the stack.
67 if (area.width < 0 || area.height < 0)
68 {
69 ClipRectangle carea;
70 mClipStack.push(carea);
71 return true;
72 }
73
74 if (mClipStack.empty())
75 {
76 ClipRectangle carea;
77 carea.x = area.x;
78 carea.y = area.y;
79 carea.width = area.width;
80 carea.height = area.height;
81 carea.xOffset = area.x;
82 carea.yOffset = area.y;
83 mClipStack.push(carea);
84 return true;
85 }
86
87 const ClipRectangle &top = mClipStack.top();
88 ClipRectangle carea;
89 carea = area;
90 carea.xOffset = top.xOffset + carea.x;
91 carea.yOffset = top.yOffset + carea.y;
92 carea.x += top.xOffset;
93 carea.y += top.yOffset;
94
95 // Clamp the pushed clip rectangle.
96 if (carea.x < top.x)
97 {
98 carea.x = top.x;
99 }
100
101 if (carea.y < top.y)
102 {
103 carea.y = top.y;
104 }
105
106 if (carea.x + carea.width > top.x + top.width)
107 {
108 carea.width = top.x + top.width - carea.x;
109
110 if (carea.width < 0)
111 {
112 carea.width = 0;
113 }
114 }
115
116 if (carea.y + carea.height > top.y + top.height)
117 {
118 carea.height = top.y + top.height - carea.y;
119
120 if (carea.height < 0)
121 {
122 carea.height = 0;
123 }
124 }
125
126 bool result = carea.isIntersecting(top);
127
128 mClipStack.push(carea);
129
130 return result;
131 }
132
133 void Graphics::popClipArea()
134 {
135
136 if (mClipStack.empty())
137 {
138 throw GCN_EXCEPTION("Tried to pop clip area from empty stack.");
139 }
140
141 mClipStack.pop();
142 }
143
144 const ClipRectangle& Graphics::getCurrentClipArea()
145 {
146 if (mClipStack.empty())
147 {
148 throw GCN_EXCEPTION("The clip area stack is empty.");
149 }
150
151 return mClipStack.top();
152 }
153
154 void Graphics::drawImage(const Image* image, int dstX, int dstY)
155 {
156 drawImage(image, 0, 0, dstX, dstY, image->getWidth(), image->getHeight());
157 }
158
159 void Graphics::setFont(Font* font)
160 {
161 mFont = font;
162 }
163
164 void Graphics::drawText(const std::string& text, int x, int y,
165 Alignment alignment)
166 {
167 if (mFont == NULL)
168 {
169 throw GCN_EXCEPTION("No font set.");
170 }
171
172 switch (alignment)
173 {
174 case LEFT:
175 mFont->drawString(this, text, x, y);
176 break;
177 case CENTER:
178 mFont->drawString(this, text, x - mFont->getWidth(text) / 2, y);
179 break;
180 case RIGHT:
181 mFont->drawString(this, text, x - mFont->getWidth(text), y);
182 break;
183 default:
184 throw GCN_EXCEPTION("Unknown alignment.");
185 }
186 }
187 }