source: trunk/src/opengl/qglpixelbuffer_win.cpp@ 204

Last change on this file since 204 was 2, checked in by Dmitry A. Kuminov, 16 years ago

Initially imported qt-all-opensource-src-4.5.1 from Trolltech.
File size: 15.5 KB
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1/****************************************************************************
2**
3** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4** Contact: Qt Software Information (qt-info@nokia.com)
5**
6** This file is part of the QtOpenGL module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial Usage
10** Licensees holding valid Qt Commercial licenses may use this file in
11** accordance with the Qt Commercial License Agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and Nokia.
14**
15** GNU Lesser General Public License Usage
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17** General Public License version 2.1 as published by the Free Software
18** Foundation and appearing in the file LICENSE.LGPL included in the
19** packaging of this file. Please review the following information to
20** ensure the GNU Lesser General Public License version 2.1 requirements
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24** additional rights. These rights are described in the Nokia Qt LGPL
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26** package.
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28** GNU General Public License Usage
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30** General Public License version 3.0 as published by the Free Software
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32** packaging of this file. Please review the following information to
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34** met: http://www.gnu.org/copyleft/gpl.html.
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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
170QGLFormat pfiToQGLFormat(HDC hdc, int pfi);
171
172static void qt_format_to_attrib_list(bool has_render_texture, const QGLFormat &f, int attribs[])
173{
174 int i = 0;
175 attribs[i++] = WGL_SUPPORT_OPENGL_ARB;
176 attribs[i++] = TRUE;
177 attribs[i++] = WGL_DRAW_TO_PBUFFER_ARB;
178 attribs[i++] = TRUE;
179
180 if (has_render_texture) {
181 attribs[i++] = WGL_BIND_TO_TEXTURE_RGBA_ARB;
182 attribs[i++] = TRUE;
183 }
184
185 attribs[i++] = WGL_COLOR_BITS_ARB;
186 attribs[i++] = 32;
187 attribs[i++] = WGL_DOUBLE_BUFFER_ARB;
188 attribs[i++] = FALSE;
189
190 if (f.stereo()) {
191 attribs[i++] = WGL_STEREO_ARB;
192 attribs[i++] = TRUE;
193 }
194 if (f.depth()) {
195 attribs[i++] = WGL_DEPTH_BITS_ARB;
196 attribs[i++] = f.depthBufferSize() == -1 ? 24 : f.depthBufferSize();
197 }
198 if (f.redBufferSize() != -1) {
199 attribs[i++] = WGL_RED_BITS_ARB;
200 attribs[i++] = f.redBufferSize();
201 }
202 if (f.greenBufferSize() != -1) {
203 attribs[i++] = WGL_GREEN_BITS_ARB;
204 attribs[i++] = f.greenBufferSize();
205 }
206 if (f.blueBufferSize() != -1) {
207 attribs[i++] = WGL_BLUE_BITS_ARB;
208 attribs[i++] = f.blueBufferSize();
209 }
210 if (f.alpha()) {
211 attribs[i++] = WGL_ALPHA_BITS_ARB;
212 attribs[i++] = f.alphaBufferSize() == -1 ? 8 : f.alphaBufferSize();
213 }
214 if (f.accum()) {
215 attribs[i++] = WGL_ACCUM_BITS_ARB;
216 attribs[i++] = f.accumBufferSize() == -1 ? 16 : f.accumBufferSize();
217 }
218 if (f.stencil()) {
219 attribs[i++] = WGL_STENCIL_BITS_ARB;
220 attribs[i++] = f.stencilBufferSize() == -1 ? 8 : f.stencilBufferSize();
221 }
222 if ((f.redBufferSize() > 8 || f.greenBufferSize() > 8
223 || f.blueBufferSize() > 8 || f.alphaBufferSize() > 8)
224 && (QGLExtensions::glExtensions & QGLExtensions::NVFloatBuffer))
225 {
226 attribs[i++] = WGL_FLOAT_COMPONENTS_NV;
227 attribs[i++] = TRUE;
228 }
229 // sample buffers doesn't work in conjunction with the render_texture extension
230 // so igonre that for now
231 // if (f.sampleBuffers()) {
232 // attribs[i++] = WGL_SAMPLE_BUFFERS_ARB;
233 // attribs[i++] = 1;
234 // attribs[i++] = WGL_SAMPLES_ARB;
235 // attribs[i++] = f.samples() == -1 ? 16 : f.samples();
236 // }
237 attribs[i] = 0;
238}
239
240bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidget *shareWidget)
241{
242 QGLWidget dmy;
243 dmy.makeCurrent(); // needed for wglGetProcAddress() to succeed
244
245 PFNWGLCREATEPBUFFERARBPROC wglCreatePbufferARB =
246 (PFNWGLCREATEPBUFFERARBPROC) wglGetProcAddress("wglCreatePbufferARB");
247 PFNWGLGETPBUFFERDCARBPROC wglGetPbufferDCARB =
248 (PFNWGLGETPBUFFERDCARBPROC) wglGetProcAddress("wglGetPbufferDCARB");
249 PFNWGLQUERYPBUFFERARBPROC wglQueryPbufferARB =
250 (PFNWGLQUERYPBUFFERARBPROC) wglGetProcAddress("wglQueryPbufferARB");
251 PFNWGLCHOOSEPIXELFORMATARBPROC wglChoosePixelFormatARB =
252 (PFNWGLCHOOSEPIXELFORMATARBPROC) wglGetProcAddress("wglChoosePixelFormatARB");
253
254 if (!wglCreatePbufferARB) // assumes that if one can be resolved, all of them can
255 return false;
256
257 dc = GetDC(dmy.winId());
258 Q_ASSERT(dc);
259
260 PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB =
261 (PFNWGLGETEXTENSIONSSTRINGARBPROC) wglGetProcAddress("wglGetExtensionsStringARB");
262
263 if (wglGetExtensionsStringARB) {
264 QString extensions(QLatin1String(wglGetExtensionsStringARB(dc)));
265 has_render_texture = extensions.contains(QLatin1String("WGL_ARB_render_texture"));
266 }
267
268 int attribs[40];
269 qt_format_to_attrib_list(has_render_texture, f, attribs);
270
271 // Find pbuffer capable pixel format.
272 unsigned int num_formats = 0;
273 int pixel_format;
274 wglChoosePixelFormatARB(dc, attribs, 0, 1, &pixel_format, &num_formats);
275
276 // some GL implementations don't support pbuffers with accum
277 // buffers, so try that before we give up
278 if (num_formats == 0 && f.accum()) {
279 QGLFormat tmp = f;
280 tmp.setAccum(false);
281 qt_format_to_attrib_list(has_render_texture, tmp, attribs);
282 wglChoosePixelFormatARB(dc, attribs, 0, 1, &pixel_format, &num_formats);
283 }
284
285 if (num_formats == 0) {
286 qWarning("QGLPixelBuffer: Unable to find a pixel format with pbuffer - giving up.");
287 ReleaseDC(dmy.winId(), dc);
288 return false;
289 }
290 format = pfiToQGLFormat(dc, pixel_format);
291
292 // NB! The below ONLY works if the width/height are powers of 2.
293 // Set some pBuffer attributes so that we can use this pBuffer as
294 // a 2D RGBA texture target.
295 int pb_attribs[] = {WGL_TEXTURE_FORMAT_ARB, WGL_TEXTURE_RGBA_ARB,
296 WGL_TEXTURE_TARGET_ARB, WGL_TEXTURE_2D_ARB, 0};
297
298 pbuf = wglCreatePbufferARB(dc, pixel_format, size.width(), size.height(),
299 has_render_texture ? pb_attribs : 0);
300 if(!pbuf) {
301 // try again without the render_texture extension
302 pbuf = wglCreatePbufferARB(dc, pixel_format, size.width(), size.height(), 0);
303 has_render_texture = false;
304 if (!pbuf) {
305 qWarning("QGLPixelBuffer: Unable to create pbuffer [w=%d, h=%d] - giving up.", size.width(), size.height());
306 ReleaseDC(dmy.winId(), dc);
307 return false;
308 }
309 }
310
311 ReleaseDC(dmy.winId(), dc);
312 dc = wglGetPbufferDCARB(pbuf);
313 ctx = wglCreateContext(dc);
314
315 if (!dc || !ctx) {
316 qWarning("QGLPixelBuffer: Unable to create pbuffer context - giving up.");
317 return false;
318 }
319
320 HGLRC share_ctx = shareWidget ? shareWidget->d_func()->glcx->d_func()->rc : 0;
321 if (share_ctx && !wglShareLists(share_ctx, ctx))
322 qWarning("QGLPixelBuffer: Unable to share display lists - with share widget.");
323
324 int width, height;
325 wglQueryPbufferARB(pbuf, WGL_PBUFFER_WIDTH_ARB, &width);
326 wglQueryPbufferARB(pbuf, WGL_PBUFFER_HEIGHT_ARB, &height);
327 return true;
328}
329
330bool QGLPixelBufferPrivate::cleanup()
331{
332 PFNWGLRELEASEPBUFFERDCARBPROC wglReleasePbufferDCARB =
333 (PFNWGLRELEASEPBUFFERDCARBPROC) wglGetProcAddress("wglReleasePbufferDCARB");
334 PFNWGLDESTROYPBUFFERARBPROC wglDestroyPbufferARB =
335 (PFNWGLDESTROYPBUFFERARBPROC) wglGetProcAddress("wglDestroyPbufferARB");
336 if (!invalid && wglReleasePbufferDCARB && wglDestroyPbufferARB) {
337 wglReleasePbufferDCARB(pbuf, dc);
338 wglDestroyPbufferARB(pbuf);
339 }
340 return true;
341}
342
343bool QGLPixelBuffer::bindToDynamicTexture(GLuint texture_id)
344{
345 Q_D(QGLPixelBuffer);
346 if (d->invalid || !d->has_render_texture)
347 return false;
348 PFNWGLBINDTEXIMAGEARBPROC wglBindTexImageARB =
349 (PFNWGLBINDTEXIMAGEARBPROC) wglGetProcAddress("wglBindTexImageARB");
350 if (wglBindTexImageARB) {
351 glBindTexture(GL_TEXTURE_2D, texture_id);
352 return wglBindTexImageARB(d->pbuf, WGL_FRONT_LEFT_ARB);
353 }
354 return false;
355}
356
357void QGLPixelBuffer::releaseFromDynamicTexture()
358{
359 Q_D(QGLPixelBuffer);
360 if (d->invalid || !d->has_render_texture)
361 return;
362 PFNWGLRELEASETEXIMAGEARBPROC wglReleaseTexImageARB =
363 (PFNWGLRELEASETEXIMAGEARBPROC) wglGetProcAddress("wglReleaseTexImageARB");
364 if (wglReleaseTexImageARB)
365 wglReleaseTexImageARB(d->pbuf, WGL_FRONT_LEFT_ARB);
366}
367
368bool QGLPixelBuffer::hasOpenGLPbuffers()
369{
370 bool ret = false;
371 QGLWidget *dmy = 0;
372 if (!QGLContext::currentContext()) {
373 dmy = new QGLWidget;
374 dmy->makeCurrent();
375 }
376 PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB =
377 (PFNWGLGETEXTENSIONSSTRINGARBPROC) wglGetProcAddress("wglGetExtensionsStringARB");
378 if (wglGetExtensionsStringARB) {
379 QString extensions(QLatin1String(wglGetExtensionsStringARB(wglGetCurrentDC())));
380 if (extensions.contains(QLatin1String("WGL_ARB_pbuffer"))
381 && extensions.contains(QLatin1String("WGL_ARB_pixel_format"))) {
382 ret = true;
383 }
384 }
385 if (dmy)
386 delete dmy;
387 return ret;
388}
389
390QT_END_NAMESPACE
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