source: trunk/src/opengl/qglpixelbuffer_mac.mm@ 1023

Last change on this file since 1023 was 846, checked in by Dmitry A. Kuminov, 14 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.
File size: 10.9 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation ([email protected])
6**
7** This file is part of the QtOpenGL module of the Qt Toolkit.
8**
9** $QT_BEGIN_LICENSE:LGPL$
10** Commercial Usage
11** Licensees holding valid Qt Commercial licenses may use this file in
12** accordance with the Qt Commercial License Agreement provided with the
13** Software or, alternatively, in accordance with the terms contained in
14** a written agreement between you and Nokia.
15**
16** GNU Lesser General Public License Usage
17** Alternatively, this file may be used under the terms of the GNU Lesser
18** General Public License version 2.1 as published by the Free Software
19** Foundation and appearing in the file LICENSE.LGPL included in the
20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
22** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
23**
24** In addition, as a special exception, Nokia gives you certain additional
25** rights. These rights are described in the Nokia Qt LGPL Exception
26** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you have questions regarding the use of this file, please contact
37** Nokia at [email protected].
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42#include "qglpixelbuffer.h"
43#include "qglpixelbuffer_p.h"
44
45#ifndef QT_MAC_USE_COCOA
46#include <AGL/agl.h>
47#endif
48
49#include <qimage.h>
50#include <private/qgl_p.h>
51#include <qdebug.h>
52
53QT_BEGIN_NAMESPACE
54
55#ifndef GL_TEXTURE_RECTANGLE_EXT
56#define GL_TEXTURE_RECTANGLE_EXT 0x84F5
57#endif
58
59static int nearest_gl_texture_size(int v)
60{
61 int n = 0, last = 0;
62 for (int s = 0; s < 32; ++s) {
63 if (((v>>s) & 1) == 1) {
64 ++n;
65 last = s;
66 }
67 }
68 if (n > 1)
69 return 1 << (last+1);
70 return 1 << last;
71}
72
73bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidget *shareWidget)
74{
75#ifdef QT_MAC_USE_COCOA
76 Q_Q(QGLPixelBuffer);
77 // create a dummy context
78 QGLContext context(f, q);
79 context.create(shareWidget ? shareWidget->context() : 0);
80
81 if (context.isSharing())
82 share_ctx = shareWidget->context()->d_func()->cx;
83
84 // steal the NSOpenGLContext and update the format
85 ctx = context.d_func()->cx;
86 context.d_func()->cx = 0;
87 // d->cx will be set to ctx later in
88 // QGLPixelBufferPrivate::common_init, so we need to retain it:
89 [static_cast<NSOpenGLContext *>(ctx) retain];
90
91 format = context.format();
92
93 GLenum target = GL_TEXTURE_2D;
94
95 if ((QGLExtensions::glExtensions() & QGLExtensions::TextureRectangle)
96 && (size.width() != nearest_gl_texture_size(size.width())
97 || size.height() != nearest_gl_texture_size(size.height())))
98 {
99 target = GL_TEXTURE_RECTANGLE_EXT;
100 }
101
102 pbuf = [[NSOpenGLPixelBuffer alloc] initWithTextureTarget:target
103 textureInternalFormat:GL_RGBA
104 textureMaxMipMapLevel:0
105 pixelsWide:size.width()
106 pixelsHigh:size.height()];
107 if (!pbuf) {
108 qWarning("QGLPixelBuffer: Cannot create a pbuffer");
109 return false;
110 }
111
112 [static_cast<NSOpenGLContext *>(ctx) setPixelBuffer:static_cast<NSOpenGLPixelBuffer *>(pbuf)
113 cubeMapFace:0
114 mipMapLevel:0
115 currentVirtualScreen:0];
116 return true;
117#else
118 GLint attribs[40], i=0;
119 attribs[i++] = AGL_RGBA;
120 attribs[i++] = AGL_BUFFER_SIZE;
121 attribs[i++] = 32;
122 attribs[i++] = AGL_LEVEL;
123 attribs[i++] = f.plane();
124 if (f.redBufferSize() != -1) {
125 attribs[i++] = AGL_RED_SIZE;
126 attribs[i++] = f.redBufferSize();
127 }
128 if (f.greenBufferSize() != -1) {
129 attribs[i++] = AGL_GREEN_SIZE;
130 attribs[i++] = f.greenBufferSize();
131 }
132 if (f.blueBufferSize() != -1) {
133 attribs[i++] = AGL_BLUE_SIZE;
134 attribs[i++] = f.blueBufferSize();
135 }
136 if (f.stereo())
137 attribs[i++] = AGL_STEREO;
138 if (f.alpha()) {
139 attribs[i++] = AGL_ALPHA_SIZE;
140 attribs[i++] = f.alphaBufferSize() == -1 ? 8 : f.alphaBufferSize();
141 }
142 if (f.stencil()) {
143 attribs[i++] = AGL_STENCIL_SIZE;
144 attribs[i++] = f.stencilBufferSize() == -1 ? 8 : f.stencilBufferSize();
145 }
146 if (f.depth()) {
147 attribs[i++] = AGL_DEPTH_SIZE;
148 attribs[i++] = f.depthBufferSize() == -1 ? 32 : f.depthBufferSize();
149 }
150 if (f.accum()) {
151 attribs[i++] = AGL_ACCUM_RED_SIZE;
152 attribs[i++] = f.accumBufferSize() == -1 ? 16 : f.accumBufferSize();
153 attribs[i++] = AGL_ACCUM_BLUE_SIZE;
154 attribs[i++] = f.accumBufferSize() == -1 ? 16 : f.accumBufferSize();
155 attribs[i++] = AGL_ACCUM_GREEN_SIZE;
156 attribs[i++] = f.accumBufferSize() == -1 ? 16 : f.accumBufferSize();
157 attribs[i++] = AGL_ACCUM_ALPHA_SIZE;
158 attribs[i++] = f.accumBufferSize() == -1 ? 16 : f.accumBufferSize();
159 }
160
161 if (f.sampleBuffers()) {
162 attribs[i++] = AGL_SAMPLE_BUFFERS_ARB;
163 attribs[i++] = 1;
164 attribs[i++] = AGL_SAMPLES_ARB;
165 attribs[i++] = f.samples() == -1 ? 4 : f.samples();
166 }
167 attribs[i] = AGL_NONE;
168
169 AGLPixelFormat format = aglChoosePixelFormat(0, 0, attribs);
170 if (!format) {
171 qWarning("QGLPixelBuffer: Unable to find a pixel format (AGL error %d).",
172 (int) aglGetError());
173 return false;
174 }
175
176 GLint res;
177 aglDescribePixelFormat(format, AGL_LEVEL, &res);
178 this->format.setPlane(res);
179 aglDescribePixelFormat(format, AGL_DOUBLEBUFFER, &res);
180 this->format.setDoubleBuffer(res);
181 aglDescribePixelFormat(format, AGL_DEPTH_SIZE, &res);
182 this->format.setDepth(res);
183 if (this->format.depth())
184 this->format.setDepthBufferSize(res);
185 aglDescribePixelFormat(format, AGL_RGBA, &res);
186 this->format.setRgba(res);
187 aglDescribePixelFormat(format, AGL_RED_SIZE, &res);
188 this->format.setRedBufferSize(res);
189 aglDescribePixelFormat(format, AGL_GREEN_SIZE, &res);
190 this->format.setGreenBufferSize(res);
191 aglDescribePixelFormat(format, AGL_BLUE_SIZE, &res);
192 this->format.setBlueBufferSize(res);
193 aglDescribePixelFormat(format, AGL_ALPHA_SIZE, &res);
194 this->format.setAlpha(res);
195 if (this->format.alpha())
196 this->format.setAlphaBufferSize(res);
197 aglDescribePixelFormat(format, AGL_ACCUM_RED_SIZE, &res);
198 this->format.setAccum(res);
199 if (this->format.accum())
200 this->format.setAccumBufferSize(res);
201 aglDescribePixelFormat(format, AGL_STENCIL_SIZE, &res);
202 this->format.setStencil(res);
203 if (this->format.stencil())
204 this->format.setStencilBufferSize(res);
205 aglDescribePixelFormat(format, AGL_STEREO, &res);
206 this->format.setStereo(res);
207 aglDescribePixelFormat(format, AGL_SAMPLE_BUFFERS_ARB, &res);
208 this->format.setSampleBuffers(res);
209 if (this->format.sampleBuffers()) {
210 aglDescribePixelFormat(format, AGL_SAMPLES_ARB, &res);
211 this->format.setSamples(res);
212 }
213
214 AGLContext share = 0;
215 if (shareWidget)
216 share = share_ctx = static_cast<AGLContext>(shareWidget->d_func()->glcx->d_func()->cx);
217 ctx = aglCreateContext(format, share);
218 if (!ctx) {
219 qWarning("QGLPixelBuffer: Unable to create a context (AGL error %d).",
220 (int) aglGetError());
221 return false;
222 }
223
224 GLenum target = GL_TEXTURE_2D;
225
226 if ((QGLExtensions::glExtensions() & QGLExtensions::TextureRectangle)
227 && (size.width() != nearest_gl_texture_size(size.width())
228 || size.height() != nearest_gl_texture_size(size.height())))
229 {
230 target = GL_TEXTURE_RECTANGLE_EXT;
231 }
232
233 if (!aglCreatePBuffer(size.width(), size.height(), target, GL_RGBA, 0, &pbuf)) {
234 qWarning("QGLPixelBuffer: Unable to create a pbuffer (AGL error %d).",
235 (int) aglGetError());
236 return false;
237 }
238
239 if (!aglSetPBuffer(ctx, pbuf, 0, 0, 0)) {
240 qWarning("QGLPixelBuffer: Unable to set pbuffer (AGL error %d).",
241 (int) aglGetError());
242 return false;
243 }
244
245 aglDestroyPixelFormat(format);
246 return true;
247
248#endif
249}
250
251bool QGLPixelBufferPrivate::cleanup()
252{
253#ifdef QT_MAC_USE_COCOA
254 [static_cast<NSOpenGLPixelBuffer *>(pbuf) release];
255 pbuf = 0;
256 [static_cast<NSOpenGLContext *>(ctx) release];
257 ctx = 0;
258#else
259 aglDestroyPBuffer(pbuf);
260#endif
261 return true;
262}
263
264bool QGLPixelBuffer::bindToDynamicTexture(GLuint texture_id)
265{
266 Q_D(QGLPixelBuffer);
267 if (d->invalid || !d->share_ctx)
268 return false;
269
270#ifdef QT_MAC_USE_COCOA
271 NSOpenGLContext *oldContext = [NSOpenGLContext currentContext];
272 if (d->share_ctx != oldContext)
273 [static_cast<NSOpenGLContext *>(d->share_ctx) makeCurrentContext];
274 glBindTexture(GL_TEXTURE_2D, texture_id);
275 [static_cast<NSOpenGLContext *>(d->share_ctx)
276 setTextureImageToPixelBuffer:static_cast<NSOpenGLPixelBuffer *>(d->pbuf)
277 colorBuffer:GL_FRONT];
278 if (oldContext && oldContext != d->share_ctx)
279 [oldContext makeCurrentContext];
280 return true;
281#else
282 aglSetCurrentContext(d->share_ctx);
283 glBindTexture(GL_TEXTURE_2D, texture_id);
284 aglTexImagePBuffer(d->share_ctx, d->pbuf, GL_FRONT);
285 return true;
286#endif
287}
288
289#ifdef Q_MAC_COMPAT_GL_FUNCTIONS
290bool QGLPixelBuffer::bindToDynamicTexture(QMacCompatGLuint texture_id)
291{
292 return bindToDynamicTexture(GLuint(texture_id));
293}
294#endif
295
296void QGLPixelBuffer::releaseFromDynamicTexture()
297{
298}
299
300GLuint QGLPixelBuffer::generateDynamicTexture() const
301{
302#ifdef QT_MAC_USE_COCOA
303 Q_D(const QGLPixelBuffer);
304 NSOpenGLContext *oldContext = [NSOpenGLContext currentContext];
305 if (d->share_ctx != oldContext)
306 [static_cast<NSOpenGLContext *>(d->share_ctx) makeCurrentContext];
307 GLuint texture;
308 glGenTextures(1, &texture);
309 glBindTexture(GL_TEXTURE_2D, texture);
310 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
311 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
312
313 if (oldContext && oldContext != d->share_ctx)
314 [oldContext makeCurrentContext];
315 return texture;
316#else
317 GLuint texture;
318 glGenTextures(1, &texture);
319 glBindTexture(GL_TEXTURE_2D, texture);
320 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
321 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
322 return texture;
323#endif
324}
325
326bool QGLPixelBuffer::hasOpenGLPbuffers()
327{
328 return true;
329}
330
331QT_END_NAMESPACE
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