Mercurial > fife-parpg

comparison ext/guichan-0.8.2/src/opengl/openglgraphics.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/opengl/openglgraphics.hpp"
49
50 #if defined (_WIN32)
51 #define WIN32_LEAN_AND_MEAN
52 #include <windows.h>
53 #endif
54
55 #if defined (__amigaos4__)
56 #include <mgl/gl.h>
57 #define glVertex3i glVertex3f
58 #elif defined(__APPLE__)
59 #include <OpenGL/gl.h>
60 #else
61 #include <GL/gl.h>
62 #endif
63
64 #include "guichan/exception.hpp"
65 #include "guichan/image.hpp"
66 #include "guichan/opengl/openglimage.hpp"
67
68 namespace gcn
69 {
70 OpenGLGraphics::OpenGLGraphics()
71 {
72 setTargetPlane(640, 480);
73 mAlpha = false;
74 }
75
76 OpenGLGraphics::OpenGLGraphics(int width, int height)
77 {
78 setTargetPlane(width, height);
79 }
80
81 OpenGLGraphics::~OpenGLGraphics()
82 {
83
84 }
85
86 void OpenGLGraphics::_beginDraw()
87 {
88 glPushAttrib(
89 GL_COLOR_BUFFER_BIT |
90 GL_CURRENT_BIT |
91 GL_DEPTH_BUFFER_BIT |
92 GL_ENABLE_BIT |
93 GL_FOG_BIT |
94 GL_LIGHTING_BIT |
95 GL_LINE_BIT |
96 GL_POINT_BIT |
97 GL_POLYGON_BIT |
98 GL_SCISSOR_BIT |
99 GL_STENCIL_BUFFER_BIT |
100 GL_TEXTURE_BIT |
101 GL_TRANSFORM_BIT |
102 GL_POINT_BIT |
103 GL_LINE_BIT
104 );
105
106 glMatrixMode(GL_MODELVIEW);
107 glPushMatrix();
108 glLoadIdentity();
109
110 glMatrixMode(GL_TEXTURE);
111 glPushMatrix();
112 glLoadIdentity();
113
114 glMatrixMode(GL_PROJECTION);
115 glPushMatrix();
116 glLoadIdentity();
117
118 glOrtho(0.0,
119 (double)mWidth,
120 (double)mHeight,
121 0.0,
122 -1.0,
123 1.0);
124
125 glDisable(GL_LIGHTING);
126 glDisable(GL_CULL_FACE);
127 glDisable(GL_DEPTH_TEST);
128 glDisable(GL_TEXTURE_2D);
129
130 glEnable(GL_SCISSOR_TEST);
131 glPointSize(1.0);
132 glLineWidth(1.0);
133
134 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
135
136 glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
137
138 pushClipArea(Rectangle(0, 0, mWidth, mHeight));
139 }
140
141 void OpenGLGraphics::_endDraw()
142 {
143 glMatrixMode(GL_MODELVIEW);
144 glPopMatrix();
145
146 glMatrixMode(GL_TEXTURE);
147 glPopMatrix();
148
149 glMatrixMode(GL_PROJECTION);
150 glPopMatrix();
151
152 glPopAttrib();
153
154 popClipArea();
155 }
156
157 bool OpenGLGraphics::pushClipArea(Rectangle area)
158 {
159 bool result = Graphics::pushClipArea(area);
160
161 glScissor(mClipStack.top().x,
162 mHeight - mClipStack.top().y - mClipStack.top().height,
163 mClipStack.top().width,
164 mClipStack.top().height);
165
166 return result;
167 }
168
169 void OpenGLGraphics::popClipArea()
170 {
171 Graphics::popClipArea();
172
173 if (mClipStack.empty())
174 {
175 return;
176 }
177
178 glScissor(mClipStack.top().x,
179 mHeight - mClipStack.top().y - mClipStack.top().height,
180 mClipStack.top().width,
181 mClipStack.top().height);
182 }
183
184 void OpenGLGraphics::setTargetPlane(int width, int height)
185 {
186 mWidth = width;
187 mHeight = height;
188 }
189
190 void OpenGLGraphics::drawImage(const Image* image,
191 int srcX,
192 int srcY,
193 int dstX,
194 int dstY,
195 int width,
196 int height)
197 {
198 const OpenGLImage* srcImage = dynamic_cast<const OpenGLImage*>(image);
199
200 if (srcImage == NULL)
201 {
202 throw GCN_EXCEPTION("Trying to draw an image of unknown format, must be an OpenGLImage.");
203 }
204
205 if (mClipStack.empty())
206 {
207 throw GCN_EXCEPTION("Clip stack is empty, perhaps you called a draw funtion outside of _beginDraw() and _endDraw()?");
208 }
209
210 const ClipRectangle& top = mClipStack.top();
211
212 dstX += top.xOffset;
213 dstY += top.yOffset;
214
215 // Find OpenGL texture coordinates
216 float texX1 = srcX / (float)srcImage->getTextureWidth();
217 float texY1 = srcY / (float)srcImage->getTextureHeight();
218 float texX2 = (srcX+width) / (float)srcImage->getTextureWidth();
219 float texY2 = (srcY+height) / (float)srcImage->getTextureHeight();
220
221 glBindTexture(GL_TEXTURE_2D, srcImage->getTextureHandle());
222
223 glEnable(GL_TEXTURE_2D);
224
225 // Check if blending already is enabled
226 if (!mAlpha)
227 {
228 glEnable(GL_BLEND);
229 }
230
231 // Draw a textured quad -- the image
232 glBegin(GL_QUADS);
233 glTexCoord2f(texX1, texY1);
234 glVertex3i(dstX, dstY, 0);
235
236 glTexCoord2f(texX1, texY2);
237 glVertex3i(dstX, dstY + height, 0);
238
239 glTexCoord2f(texX2, texY2);
240 glVertex3i(dstX + width, dstY + height, 0);
241
242 glTexCoord2f(texX2, texY1);
243 glVertex3i(dstX + width, dstY, 0);
244 glEnd();
245 glDisable(GL_TEXTURE_2D);
246
247 // Don't disable blending if the color has alpha
248 if (!mAlpha)
249 {
250 glDisable(GL_BLEND);
251 }
252 }
253
254 void OpenGLGraphics::drawPoint(int x, int y)
255 {
256 if (mClipStack.empty())
257 {
258 throw GCN_EXCEPTION("Clip stack is empty, perhaps you called a draw funtion outside of _beginDraw() and _endDraw()?");
259 }
260
261 const ClipRectangle& top = mClipStack.top();
262
263 x += top.xOffset;
264 y += top.yOffset;
265
266 glBegin(GL_POINTS);
267 glVertex2i(x, y);
268 glEnd();
269 }
270
271 void OpenGLGraphics::drawLine(int x1, int y1, int x2, int y2)
272 {
273 if (mClipStack.empty())
274 {
275 throw GCN_EXCEPTION("Clip stack is empty, perhaps you called a draw funtion outside of _beginDraw() and _endDraw()?");
276 }
277
278 const ClipRectangle& top = mClipStack.top();
279
280 x1 += top.xOffset;
281 y1 += top.yOffset;
282 x2 += top.xOffset;
283 y2 += top.yOffset;
284
285 glBegin(GL_LINES);
286 glVertex2f(x1 + 0.375f,
287 y1 + 0.375f);
288 glVertex2f(x2 + 1.0f - 0.375f,
289 y2 + 1.0f - 0.375f);
290 glEnd();
291
292 glBegin(GL_POINTS);
293 glVertex2f(x2 + 1.0f - 0.375f,
294 y2 + 1.0f - 0.375f);
295 glEnd();
296
297 glBegin(GL_POINTS);
298 glVertex2f(x1 + 0.375f,
299 y1 + 0.375f);
300 glEnd();
301 }
302
303 void OpenGLGraphics::drawRectangle(const Rectangle& rectangle)
304 {
305 if (mClipStack.empty())
306 {
307 throw GCN_EXCEPTION("Clip stack is empty, perhaps you called a draw funtion outside of _beginDraw() and _endDraw()?");
308 }
309
310 const ClipRectangle& top = mClipStack.top();
311
312 glBegin(GL_LINE_LOOP);
313 glVertex2f(rectangle.x + top.xOffset,
314 rectangle.y + top.yOffset);
315 glVertex2f(rectangle.x + rectangle.width + top.xOffset - 1.0f,
316 rectangle.y + top.yOffset + 0.375f);
317 glVertex2f(rectangle.x + rectangle.width + top.xOffset - 1.0f,
318 rectangle.y + rectangle.height + top.yOffset);
319 glVertex2f(rectangle.x + top.xOffset,
320 rectangle.y + rectangle.height + top.yOffset);
321 glEnd();
322 }
323
324 void OpenGLGraphics::fillRectangle(const Rectangle& rectangle)
325 {
326 if (mClipStack.empty())
327 {
328 throw GCN_EXCEPTION("Clip stack is empty, perhaps you called a draw funtion outside of _beginDraw() and _endDraw()?");
329 }
330
331 const ClipRectangle& top = mClipStack.top();
332
333 glBegin(GL_QUADS);
334 glVertex2i(rectangle.x + top.xOffset,
335 rectangle.y + top.yOffset);
336 glVertex2i(rectangle.x + rectangle.width + top.xOffset,
337 rectangle.y + top.yOffset);
338 glVertex2i(rectangle.x + rectangle.width + top.xOffset,
339 rectangle.y + rectangle.height + top.yOffset);
340 glVertex2i(rectangle.x + top.xOffset,
341 rectangle.y + rectangle.height + top.yOffset);
342 glEnd();
343 }
344
345 void OpenGLGraphics::setColor(const Color& color)
346 {
347 mColor = color;
348 glColor4ub((GLubyte) color.r,
349 (GLubyte) color.g,
350 (GLubyte) color.b,
351 (GLubyte) color.a);
352
353 mAlpha = color.a != 255;
354
355 if (mAlpha)
356 {
357 glEnable(GL_BLEND);
358 }
359 }
360
361 const Color& OpenGLGraphics::getColor() const
362 {
363 return mColor;
364 }
365 }