source: trunk/src/opengl/qglpixelbuffer_win.cpp@ 953

Last change on this file since 953 was 846, checked in by Dmitry A. Kuminov, 15 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.
File size: 16.0 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation (qt-info@nokia.com)
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 qt-info@nokia.com.
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42#include <qglpixelbuffer.h>
43#include <qgl.h>
44#include <private/qgl_p.h>
45
46#include <private/qglpixelbuffer_p.h>
47
48#include <qimage.h>
49#include <qdebug.h>
50
51QT_BEGIN_NAMESPACE
52
53/* WGL_WGLEXT_PROTOTYPES */
54typedef const char * (WINAPI * PFNWGLGETEXTENSIONSSTRINGARBPROC) (HDC hdc);
55typedef HPBUFFERARB (WINAPI * PFNWGLCREATEPBUFFERARBPROC) (HDC hDC, int iPixelFormat, int iWidth, int iHeight, const int *piAttribList);
56typedef HDC (WINAPI * PFNWGLGETPBUFFERDCARBPROC) (HPBUFFERARB hPbuffer);
57typedef int (WINAPI * PFNWGLRELEASEPBUFFERDCARBPROC) (HPBUFFERARB hPbuffer, HDC hDC);
58typedef BOOL (WINAPI * PFNWGLDESTROYPBUFFERARBPROC) (HPBUFFERARB hPbuffer);
59typedef BOOL (WINAPI * PFNWGLQUERYPBUFFERARBPROC) (HPBUFFERARB hPbuffer, int iAttribute, int *piValue);
60typedef BOOL (WINAPI * PFNWGLGETPIXELFORMATATTRIBIVARBPROC) (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, int *piValues);
61typedef BOOL (WINAPI * PFNWGLGETPIXELFORMATATTRIBFVARBPROC) (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, FLOAT *pfValues);
62typedef BOOL (WINAPI * PFNWGLCHOOSEPIXELFORMATARBPROC) (HDC hdc, const int *piAttribIList, const FLOAT *pfAttribFList, UINT nMaxFormats, int *piFormats, UINT *nNumFormats);
63typedef BOOL (WINAPI * PFNWGLBINDTEXIMAGEARBPROC) (HPBUFFERARB hPbuffer, int iBuffer);
64typedef BOOL (WINAPI * PFNWGLRELEASETEXIMAGEARBPROC) (HPBUFFERARB hPbuffer, int iBuffer);
65typedef BOOL (WINAPI * PFNWGLSETPBUFFERATTRIBARBPROC) (HPBUFFERARB hPbuffer, const int * piAttribList);
66
67#ifndef WGL_ARB_pbuffer
68#define WGL_DRAW_TO_PBUFFER_ARB 0x202D
69#define WGL_MAX_PBUFFER_PIXELS_ARB 0x202E
70#define WGL_MAX_PBUFFER_WIDTH_ARB 0x202F
71#define WGL_MAX_PBUFFER_HEIGHT_ARB 0x2030
72#define WGL_PBUFFER_LARGEST_ARB 0x2033
73#define WGL_PBUFFER_WIDTH_ARB 0x2034
74#define WGL_PBUFFER_HEIGHT_ARB 0x2035
75#define WGL_PBUFFER_LOST_ARB 0x2036
76#endif
77
78#ifndef WGL_ARB_pixel_format
79#define WGL_NUMBER_PIXEL_FORMATS_ARB 0x2000
80#define WGL_DRAW_TO_WINDOW_ARB 0x2001
81#define WGL_DRAW_TO_BITMAP_ARB 0x2002
82#define WGL_ACCELERATION_ARB 0x2003
83#define WGL_NEED_PALETTE_ARB 0x2004
84#define WGL_NEED_SYSTEM_PALETTE_ARB 0x2005
85#define WGL_SWAP_LAYER_BUFFERS_ARB 0x2006
86#define WGL_SWAP_METHOD_ARB 0x2007
87#define WGL_NUMBER_OVERLAYS_ARB 0x2008
88#define WGL_NUMBER_UNDERLAYS_ARB 0x2009
89#define WGL_TRANSPARENT_ARB 0x200A
90#define WGL_TRANSPARENT_RED_VALUE_ARB 0x2037
91#define WGL_TRANSPARENT_GREEN_VALUE_ARB 0x2038
92#define WGL_TRANSPARENT_BLUE_VALUE_ARB 0x2039
93#define WGL_TRANSPARENT_ALPHA_VALUE_ARB 0x203A
94#define WGL_TRANSPARENT_INDEX_VALUE_ARB 0x203B
95#define WGL_SHARE_DEPTH_ARB 0x200C
96#define WGL_SHARE_STENCIL_ARB 0x200D
97#define WGL_SHARE_ACCUM_ARB 0x200E
98#define WGL_SUPPORT_GDI_ARB 0x200F
99#define WGL_SUPPORT_OPENGL_ARB 0x2010
100#define WGL_DOUBLE_BUFFER_ARB 0x2011
101#define WGL_STEREO_ARB 0x2012
102#define WGL_PIXEL_TYPE_ARB 0x2013
103#define WGL_COLOR_BITS_ARB 0x2014
104#define WGL_RED_BITS_ARB 0x2015
105#define WGL_RED_SHIFT_ARB 0x2016
106#define WGL_GREEN_BITS_ARB 0x2017
107#define WGL_GREEN_SHIFT_ARB 0x2018
108#define WGL_BLUE_BITS_ARB 0x2019
109#define WGL_BLUE_SHIFT_ARB 0x201A
110#define WGL_ALPHA_BITS_ARB 0x201B
111#define WGL_ALPHA_SHIFT_ARB 0x201C
112#define WGL_ACCUM_BITS_ARB 0x201D
113#define WGL_ACCUM_RED_BITS_ARB 0x201E
114#define WGL_ACCUM_GREEN_BITS_ARB 0x201F
115#define WGL_ACCUM_BLUE_BITS_ARB 0x2020
116#define WGL_ACCUM_ALPHA_BITS_ARB 0x2021
117#define WGL_DEPTH_BITS_ARB 0x2022
118#define WGL_STENCIL_BITS_ARB 0x2023
119#define WGL_AUX_BUFFERS_ARB 0x2024
120#define WGL_NO_ACCELERATION_ARB 0x2025
121#define WGL_GENERIC_ACCELERATION_ARB 0x2026
122#define WGL_FULL_ACCELERATION_ARB 0x2027
123#define WGL_SWAP_EXCHANGE_ARB 0x2028
124#define WGL_SWAP_COPY_ARB 0x2029
125#define WGL_SWAP_UNDEFINED_ARB 0x202A
126#define WGL_TYPE_RGBA_ARB 0x202B
127#define WGL_TYPE_COLORINDEX_ARB 0x202C
128#endif
129
130#ifndef WGL_ARB_render_texture
131#define WGL_BIND_TO_TEXTURE_RGB_ARB 0x2070
132#define WGL_BIND_TO_TEXTURE_RGBA_ARB 0x2071
133#define WGL_TEXTURE_FORMAT_ARB 0x2072
134#define WGL_TEXTURE_TARGET_ARB 0x2073
135#define WGL_MIPMAP_TEXTURE_ARB 0x2074
136#define WGL_TEXTURE_RGB_ARB 0x2075
137#define WGL_TEXTURE_RGBA_ARB 0x2076
138#define WGL_NO_TEXTURE_ARB 0x2077
139#define WGL_TEXTURE_CUBE_MAP_ARB 0x2078
140#define WGL_TEXTURE_1D_ARB 0x2079
141#define WGL_TEXTURE_2D_ARB 0x207A
142#define WGL_MIPMAP_LEVEL_ARB 0x207B
143#define WGL_CUBE_MAP_FACE_ARB 0x207C
144#define WGL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB 0x207D
145#define WGL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB 0x207E
146#define WGL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB 0x207F
147#define WGL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB 0x2080
148#define WGL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB 0x2081
149#define WGL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB 0x2082
150#define WGL_FRONT_LEFT_ARB 0x2083
151#define WGL_FRONT_RIGHT_ARB 0x2084
152#define WGL_BACK_LEFT_ARB 0x2085
153#define WGL_BACK_RIGHT_ARB 0x2086
154#define WGL_AUX0_ARB 0x2087
155#define WGL_AUX1_ARB 0x2088
156#define WGL_AUX2_ARB 0x2089
157#define WGL_AUX3_ARB 0x208A
158#define WGL_AUX4_ARB 0x208B
159#define WGL_AUX5_ARB 0x208C
160#define WGL_AUX6_ARB 0x208D
161#define WGL_AUX7_ARB 0x208E
162#define WGL_AUX8_ARB 0x208F
163#define WGL_AUX9_ARB 0x2090
164#endif
165
166#ifndef WGL_FLOAT_COMPONENTS_NV
167#define WGL_FLOAT_COMPONENTS_NV 0x20B0
168#endif
169
170#ifndef WGL_ARB_multisample
171#define WGL_SAMPLE_BUFFERS_ARB 0x2041
172#define WGL_SAMPLES_ARB 0x2042
173#endif
174
175#ifndef GL_SAMPLES_ARB
176#define GL_SAMPLES_ARB 0x80A9
177#endif
178
179QGLFormat pfiToQGLFormat(HDC hdc, int pfi);
180
181static void qt_format_to_attrib_list(bool has_render_texture, const QGLFormat &f, int attribs[])
182{
183 int i = 0;
184 attribs[i++] = WGL_SUPPORT_OPENGL_ARB;
185 attribs[i++] = TRUE;
186 attribs[i++] = WGL_DRAW_TO_PBUFFER_ARB;
187 attribs[i++] = TRUE;
188
189 if (has_render_texture) {
190 attribs[i++] = WGL_BIND_TO_TEXTURE_RGBA_ARB;
191 attribs[i++] = TRUE;
192 }
193
194 attribs[i++] = WGL_COLOR_BITS_ARB;
195 attribs[i++] = 32;
196 attribs[i++] = WGL_DOUBLE_BUFFER_ARB;
197 attribs[i++] = FALSE;
198
199 if (f.stereo()) {
200 attribs[i++] = WGL_STEREO_ARB;
201 attribs[i++] = TRUE;
202 }
203 if (f.depth()) {
204 attribs[i++] = WGL_DEPTH_BITS_ARB;
205 attribs[i++] = f.depthBufferSize() == -1 ? 24 : f.depthBufferSize();
206 }
207 if (f.redBufferSize() != -1) {
208 attribs[i++] = WGL_RED_BITS_ARB;
209 attribs[i++] = f.redBufferSize();
210 }
211 if (f.greenBufferSize() != -1) {
212 attribs[i++] = WGL_GREEN_BITS_ARB;
213 attribs[i++] = f.greenBufferSize();
214 }
215 if (f.blueBufferSize() != -1) {
216 attribs[i++] = WGL_BLUE_BITS_ARB;
217 attribs[i++] = f.blueBufferSize();
218 }
219 if (f.alpha()) {
220 attribs[i++] = WGL_ALPHA_BITS_ARB;
221 attribs[i++] = f.alphaBufferSize() == -1 ? 8 : f.alphaBufferSize();
222 }
223 if (f.accum()) {
224 attribs[i++] = WGL_ACCUM_BITS_ARB;
225 attribs[i++] = f.accumBufferSize() == -1 ? 16 : f.accumBufferSize();
226 }
227 if (f.stencil()) {
228 attribs[i++] = WGL_STENCIL_BITS_ARB;
229 attribs[i++] = f.stencilBufferSize() == -1 ? 8 : f.stencilBufferSize();
230 }
231 if ((f.redBufferSize() > 8 || f.greenBufferSize() > 8
232 || f.blueBufferSize() > 8 || f.alphaBufferSize() > 8)
233 && (QGLExtensions::glExtensions() & QGLExtensions::NVFloatBuffer))
234 {
235 attribs[i++] = WGL_FLOAT_COMPONENTS_NV;
236 attribs[i++] = TRUE;
237 }
238 if (f.sampleBuffers()) {
239 attribs[i++] = WGL_SAMPLE_BUFFERS_ARB;
240 attribs[i++] = 1;
241 attribs[i++] = WGL_SAMPLES_ARB;
242 attribs[i++] = f.samples() == -1 ? 16 : f.samples();
243 }
244 attribs[i] = 0;
245}
246
247bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidget *shareWidget)
248{
249 QGLTemporaryContext tempContext;
250
251 PFNWGLCREATEPBUFFERARBPROC wglCreatePbufferARB =
252 (PFNWGLCREATEPBUFFERARBPROC) wglGetProcAddress("wglCreatePbufferARB");
253 PFNWGLGETPBUFFERDCARBPROC wglGetPbufferDCARB =
254 (PFNWGLGETPBUFFERDCARBPROC) wglGetProcAddress("wglGetPbufferDCARB");
255 PFNWGLQUERYPBUFFERARBPROC wglQueryPbufferARB =
256 (PFNWGLQUERYPBUFFERARBPROC) wglGetProcAddress("wglQueryPbufferARB");
257 PFNWGLCHOOSEPIXELFORMATARBPROC wglChoosePixelFormatARB =
258 (PFNWGLCHOOSEPIXELFORMATARBPROC) wglGetProcAddress("wglChoosePixelFormatARB");
259
260 if (!wglCreatePbufferARB) // assumes that if one can be resolved, all of them can
261 return false;
262
263 dc = wglGetCurrentDC();
264 Q_ASSERT(dc);
265 has_render_texture = false;
266
267 // sample buffers doesn't work in conjunction with the render_texture extension
268 if (!f.sampleBuffers()) {
269 PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB =
270 (PFNWGLGETEXTENSIONSSTRINGARBPROC) wglGetProcAddress("wglGetExtensionsStringARB");
271
272 if (wglGetExtensionsStringARB) {
273 QString extensions(QLatin1String(wglGetExtensionsStringARB(dc)));
274 has_render_texture = extensions.contains(QLatin1String("WGL_ARB_render_texture"));
275 }
276 }
277
278 int attribs[40];
279 qt_format_to_attrib_list(has_render_texture, f, attribs);
280
281 // Find pbuffer capable pixel format.
282 unsigned int num_formats = 0;
283 int pixel_format;
284 wglChoosePixelFormatARB(dc, attribs, 0, 1, &pixel_format, &num_formats);
285
286 // some GL implementations don't support pbuffers with accum
287 // buffers, so try that before we give up
288 if (num_formats == 0 && f.accum()) {
289 QGLFormat tmp = f;
290 tmp.setAccum(false);
291 qt_format_to_attrib_list(has_render_texture, tmp, attribs);
292 wglChoosePixelFormatARB(dc, attribs, 0, 1, &pixel_format, &num_formats);
293 }
294
295 if (num_formats == 0) {
296 qWarning("QGLPixelBuffer: Unable to find a pixel format with pbuffer - giving up.");
297 return false;
298 }
299 format = pfiToQGLFormat(dc, pixel_format);
300
301 // NB! The below ONLY works if the width/height are powers of 2.
302 // Set some pBuffer attributes so that we can use this pBuffer as
303 // a 2D RGBA texture target.
304 int pb_attribs[] = {WGL_TEXTURE_FORMAT_ARB, WGL_TEXTURE_RGBA_ARB,
305 WGL_TEXTURE_TARGET_ARB, WGL_TEXTURE_2D_ARB, 0};
306
307 pbuf = wglCreatePbufferARB(dc, pixel_format, size.width(), size.height(),
308 has_render_texture ? pb_attribs : 0);
309 if (!pbuf) {
310 // try again without the render_texture extension
311 pbuf = wglCreatePbufferARB(dc, pixel_format, size.width(), size.height(), 0);
312 has_render_texture = false;
313 if (!pbuf) {
314 qWarning("QGLPixelBuffer: Unable to create pbuffer [w=%d, h=%d] - giving up.", size.width(), size.height());
315 return false;
316 }
317 }
318
319 dc = wglGetPbufferDCARB(pbuf);
320 ctx = wglCreateContext(dc);
321 if (!dc || !ctx) {
322 qWarning("QGLPixelBuffer: Unable to create pbuffer context - giving up.");
323 return false;
324 }
325
326 // Explicitly disable the render_texture extension if we have a
327 // multi-sampled pbuffer context. This seems to be a problem only with
328 // ATI cards if multi-sampling is forced globally in the driver.
329 wglMakeCurrent(dc, ctx);
330 GLint samples = 0;
331 glGetIntegerv(GL_SAMPLES_ARB, &samples);
332 if (has_render_texture && samples != 0)
333 has_render_texture = false;
334
335 HGLRC share_ctx = shareWidget ? shareWidget->d_func()->glcx->d_func()->rc : 0;
336 if (share_ctx && !wglShareLists(share_ctx, ctx))
337 qWarning("QGLPixelBuffer: Unable to share display lists - with share widget.");
338
339 int width, height;
340 wglQueryPbufferARB(pbuf, WGL_PBUFFER_WIDTH_ARB, &width);
341 wglQueryPbufferARB(pbuf, WGL_PBUFFER_HEIGHT_ARB, &height);
342 return true;
343}
344
345bool QGLPixelBufferPrivate::cleanup()
346{
347 PFNWGLRELEASEPBUFFERDCARBPROC wglReleasePbufferDCARB =
348 (PFNWGLRELEASEPBUFFERDCARBPROC) wglGetProcAddress("wglReleasePbufferDCARB");
349 PFNWGLDESTROYPBUFFERARBPROC wglDestroyPbufferARB =
350 (PFNWGLDESTROYPBUFFERARBPROC) wglGetProcAddress("wglDestroyPbufferARB");
351 if (!invalid && wglReleasePbufferDCARB && wglDestroyPbufferARB) {
352 wglReleasePbufferDCARB(pbuf, dc);
353 wglDestroyPbufferARB(pbuf);
354 }
355 return true;
356}
357
358bool QGLPixelBuffer::bindToDynamicTexture(GLuint texture_id)
359{
360 Q_D(QGLPixelBuffer);
361 if (d->invalid || !d->has_render_texture)
362 return false;
363 PFNWGLBINDTEXIMAGEARBPROC wglBindTexImageARB =
364 (PFNWGLBINDTEXIMAGEARBPROC) wglGetProcAddress("wglBindTexImageARB");
365 if (wglBindTexImageARB) {
366 glBindTexture(GL_TEXTURE_2D, texture_id);
367 return wglBindTexImageARB(d->pbuf, WGL_FRONT_LEFT_ARB);
368 }
369 return false;
370}
371
372void QGLPixelBuffer::releaseFromDynamicTexture()
373{
374 Q_D(QGLPixelBuffer);
375 if (d->invalid || !d->has_render_texture)
376 return;
377 PFNWGLRELEASETEXIMAGEARBPROC wglReleaseTexImageARB =
378 (PFNWGLRELEASETEXIMAGEARBPROC) wglGetProcAddress("wglReleaseTexImageARB");
379 if (wglReleaseTexImageARB)
380 wglReleaseTexImageARB(d->pbuf, WGL_FRONT_LEFT_ARB);
381}
382
383bool QGLPixelBuffer::hasOpenGLPbuffers()
384{
385 bool ret = false;
386 QGLTemporaryContext *tmpContext = 0;
387 if (!QGLContext::currentContext())
388 tmpContext = new QGLTemporaryContext;
389 PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB =
390 (PFNWGLGETEXTENSIONSSTRINGARBPROC) wglGetProcAddress("wglGetExtensionsStringARB");
391 if (wglGetExtensionsStringARB) {
392 QString extensions(QLatin1String(wglGetExtensionsStringARB(wglGetCurrentDC())));
393 if (extensions.contains(QLatin1String("WGL_ARB_pbuffer"))
394 && extensions.contains(QLatin1String("WGL_ARB_pixel_format"))) {
395 ret = true;
396 }
397 }
398 if (tmpContext)
399 delete tmpContext;
400 return ret;
401}
402
403QT_END_NAMESPACE
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