/**************************************************************************** | |
** | |
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
** All rights reserved. | |
** Contact: Nokia Corporation (qt-info@nokia.com) | |
** | |
** This file is part of the QtOpenGL module of the Qt Toolkit. | |
** | |
** $QT_BEGIN_LICENSE:LGPL$ | |
** GNU Lesser General Public License Usage | |
** This file may be used under the terms of the GNU Lesser General Public | |
** License version 2.1 as published by the Free Software Foundation and | |
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** file. Please review the following information to ensure the GNU Lesser | |
** General Public License version 2.1 requirements will be met: | |
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** | |
** In addition, as a special exception, Nokia gives you certain additional | |
** rights. These rights are described in the Nokia Qt LGPL Exception | |
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. | |
** | |
** GNU General Public License Usage | |
** Alternatively, this file may be used under the terms of the GNU General | |
** Public License version 3.0 as published by the Free Software Foundation | |
** and appearing in the file LICENSE.GPL included in the packaging of this | |
** file. Please review the following information to ensure the GNU General | |
** Public License version 3.0 requirements will be met: | |
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** Other Usage | |
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** conditions contained in a signed written agreement between you and Nokia. | |
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** $QT_END_LICENSE$ | |
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****************************************************************************/ | |
#include <qglpixelbuffer.h> | |
#include <qgl.h> | |
#include <private/qgl_p.h> | |
#include <private/qglpixelbuffer_p.h> | |
#include <qimage.h> | |
#include <qdebug.h> | |
QT_BEGIN_NAMESPACE | |
/* WGL_WGLEXT_PROTOTYPES */ | |
typedef const char * (WINAPI * PFNWGLGETEXTENSIONSSTRINGARBPROC) (HDC hdc); | |
typedef HPBUFFERARB (WINAPI * PFNWGLCREATEPBUFFERARBPROC) (HDC hDC, int iPixelFormat, int iWidth, int iHeight, const int *piAttribList); | |
typedef HDC (WINAPI * PFNWGLGETPBUFFERDCARBPROC) (HPBUFFERARB hPbuffer); | |
typedef int (WINAPI * PFNWGLRELEASEPBUFFERDCARBPROC) (HPBUFFERARB hPbuffer, HDC hDC); | |
typedef BOOL (WINAPI * PFNWGLDESTROYPBUFFERARBPROC) (HPBUFFERARB hPbuffer); | |
typedef BOOL (WINAPI * PFNWGLQUERYPBUFFERARBPROC) (HPBUFFERARB hPbuffer, int iAttribute, int *piValue); | |
typedef BOOL (WINAPI * PFNWGLGETPIXELFORMATATTRIBIVARBPROC) (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, int *piValues); | |
typedef BOOL (WINAPI * PFNWGLGETPIXELFORMATATTRIBFVARBPROC) (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, FLOAT *pfValues); | |
typedef BOOL (WINAPI * PFNWGLCHOOSEPIXELFORMATARBPROC) (HDC hdc, const int *piAttribIList, const FLOAT *pfAttribFList, UINT nMaxFormats, int *piFormats, UINT *nNumFormats); | |
typedef BOOL (WINAPI * PFNWGLBINDTEXIMAGEARBPROC) (HPBUFFERARB hPbuffer, int iBuffer); | |
typedef BOOL (WINAPI * PFNWGLRELEASETEXIMAGEARBPROC) (HPBUFFERARB hPbuffer, int iBuffer); | |
typedef BOOL (WINAPI * PFNWGLSETPBUFFERATTRIBARBPROC) (HPBUFFERARB hPbuffer, const int * piAttribList); | |
#ifndef WGL_ARB_pbuffer | |
#define WGL_DRAW_TO_PBUFFER_ARB 0x202D | |
#define WGL_MAX_PBUFFER_PIXELS_ARB 0x202E | |
#define WGL_MAX_PBUFFER_WIDTH_ARB 0x202F | |
#define WGL_MAX_PBUFFER_HEIGHT_ARB 0x2030 | |
#define WGL_PBUFFER_LARGEST_ARB 0x2033 | |
#define WGL_PBUFFER_WIDTH_ARB 0x2034 | |
#define WGL_PBUFFER_HEIGHT_ARB 0x2035 | |
#define WGL_PBUFFER_LOST_ARB 0x2036 | |
#endif | |
#ifndef WGL_ARB_pixel_format | |
#define WGL_NUMBER_PIXEL_FORMATS_ARB 0x2000 | |
#define WGL_DRAW_TO_WINDOW_ARB 0x2001 | |
#define WGL_DRAW_TO_BITMAP_ARB 0x2002 | |
#define WGL_ACCELERATION_ARB 0x2003 | |
#define WGL_NEED_PALETTE_ARB 0x2004 | |
#define WGL_NEED_SYSTEM_PALETTE_ARB 0x2005 | |
#define WGL_SWAP_LAYER_BUFFERS_ARB 0x2006 | |
#define WGL_SWAP_METHOD_ARB 0x2007 | |
#define WGL_NUMBER_OVERLAYS_ARB 0x2008 | |
#define WGL_NUMBER_UNDERLAYS_ARB 0x2009 | |
#define WGL_TRANSPARENT_ARB 0x200A | |
#define WGL_TRANSPARENT_RED_VALUE_ARB 0x2037 | |
#define WGL_TRANSPARENT_GREEN_VALUE_ARB 0x2038 | |
#define WGL_TRANSPARENT_BLUE_VALUE_ARB 0x2039 | |
#define WGL_TRANSPARENT_ALPHA_VALUE_ARB 0x203A | |
#define WGL_TRANSPARENT_INDEX_VALUE_ARB 0x203B | |
#define WGL_SHARE_DEPTH_ARB 0x200C | |
#define WGL_SHARE_STENCIL_ARB 0x200D | |
#define WGL_SHARE_ACCUM_ARB 0x200E | |
#define WGL_SUPPORT_GDI_ARB 0x200F | |
#define WGL_SUPPORT_OPENGL_ARB 0x2010 | |
#define WGL_DOUBLE_BUFFER_ARB 0x2011 | |
#define WGL_STEREO_ARB 0x2012 | |
#define WGL_PIXEL_TYPE_ARB 0x2013 | |
#define WGL_COLOR_BITS_ARB 0x2014 | |
#define WGL_RED_BITS_ARB 0x2015 | |
#define WGL_RED_SHIFT_ARB 0x2016 | |
#define WGL_GREEN_BITS_ARB 0x2017 | |
#define WGL_GREEN_SHIFT_ARB 0x2018 | |
#define WGL_BLUE_BITS_ARB 0x2019 | |
#define WGL_BLUE_SHIFT_ARB 0x201A | |
#define WGL_ALPHA_BITS_ARB 0x201B | |
#define WGL_ALPHA_SHIFT_ARB 0x201C | |
#define WGL_ACCUM_BITS_ARB 0x201D | |
#define WGL_ACCUM_RED_BITS_ARB 0x201E | |
#define WGL_ACCUM_GREEN_BITS_ARB 0x201F | |
#define WGL_ACCUM_BLUE_BITS_ARB 0x2020 | |
#define WGL_ACCUM_ALPHA_BITS_ARB 0x2021 | |
#define WGL_DEPTH_BITS_ARB 0x2022 | |
#define WGL_STENCIL_BITS_ARB 0x2023 | |
#define WGL_AUX_BUFFERS_ARB 0x2024 | |
#define WGL_NO_ACCELERATION_ARB 0x2025 | |
#define WGL_GENERIC_ACCELERATION_ARB 0x2026 | |
#define WGL_FULL_ACCELERATION_ARB 0x2027 | |
#define WGL_SWAP_EXCHANGE_ARB 0x2028 | |
#define WGL_SWAP_COPY_ARB 0x2029 | |
#define WGL_SWAP_UNDEFINED_ARB 0x202A | |
#define WGL_TYPE_RGBA_ARB 0x202B | |
#define WGL_TYPE_COLORINDEX_ARB 0x202C | |
#endif | |
#ifndef WGL_ARB_render_texture | |
#define WGL_BIND_TO_TEXTURE_RGB_ARB 0x2070 | |
#define WGL_BIND_TO_TEXTURE_RGBA_ARB 0x2071 | |
#define WGL_TEXTURE_FORMAT_ARB 0x2072 | |
#define WGL_TEXTURE_TARGET_ARB 0x2073 | |
#define WGL_MIPMAP_TEXTURE_ARB 0x2074 | |
#define WGL_TEXTURE_RGB_ARB 0x2075 | |
#define WGL_TEXTURE_RGBA_ARB 0x2076 | |
#define WGL_NO_TEXTURE_ARB 0x2077 | |
#define WGL_TEXTURE_CUBE_MAP_ARB 0x2078 | |
#define WGL_TEXTURE_1D_ARB 0x2079 | |
#define WGL_TEXTURE_2D_ARB 0x207A | |
#define WGL_MIPMAP_LEVEL_ARB 0x207B | |
#define WGL_CUBE_MAP_FACE_ARB 0x207C | |
#define WGL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB 0x207D | |
#define WGL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB 0x207E | |
#define WGL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB 0x207F | |
#define WGL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB 0x2080 | |
#define WGL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB 0x2081 | |
#define WGL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB 0x2082 | |
#define WGL_FRONT_LEFT_ARB 0x2083 | |
#define WGL_FRONT_RIGHT_ARB 0x2084 | |
#define WGL_BACK_LEFT_ARB 0x2085 | |
#define WGL_BACK_RIGHT_ARB 0x2086 | |
#define WGL_AUX0_ARB 0x2087 | |
#define WGL_AUX1_ARB 0x2088 | |
#define WGL_AUX2_ARB 0x2089 | |
#define WGL_AUX3_ARB 0x208A | |
#define WGL_AUX4_ARB 0x208B | |
#define WGL_AUX5_ARB 0x208C | |
#define WGL_AUX6_ARB 0x208D | |
#define WGL_AUX7_ARB 0x208E | |
#define WGL_AUX8_ARB 0x208F | |
#define WGL_AUX9_ARB 0x2090 | |
#endif | |
#ifndef WGL_FLOAT_COMPONENTS_NV | |
#define WGL_FLOAT_COMPONENTS_NV 0x20B0 | |
#endif | |
#ifndef WGL_ARB_multisample | |
#define WGL_SAMPLE_BUFFERS_ARB 0x2041 | |
#define WGL_SAMPLES_ARB 0x2042 | |
#endif | |
#ifndef GL_SAMPLES_ARB | |
#define GL_SAMPLES_ARB 0x80A9 | |
#endif | |
QGLFormat pfiToQGLFormat(HDC hdc, int pfi); | |
static void qt_format_to_attrib_list(bool has_render_texture, const QGLFormat &f, int attribs[]) | |
{ | |
int i = 0; | |
attribs[i++] = WGL_SUPPORT_OPENGL_ARB; | |
attribs[i++] = TRUE; | |
attribs[i++] = WGL_DRAW_TO_PBUFFER_ARB; | |
attribs[i++] = TRUE; | |
if (has_render_texture) { | |
attribs[i++] = WGL_BIND_TO_TEXTURE_RGBA_ARB; | |
attribs[i++] = TRUE; | |
} | |
attribs[i++] = WGL_COLOR_BITS_ARB; | |
attribs[i++] = 32; | |
attribs[i++] = WGL_DOUBLE_BUFFER_ARB; | |
attribs[i++] = FALSE; | |
if (f.stereo()) { | |
attribs[i++] = WGL_STEREO_ARB; | |
attribs[i++] = TRUE; | |
} | |
if (f.depth()) { | |
attribs[i++] = WGL_DEPTH_BITS_ARB; | |
attribs[i++] = f.depthBufferSize() == -1 ? 24 : f.depthBufferSize(); | |
} | |
if (f.redBufferSize() != -1) { | |
attribs[i++] = WGL_RED_BITS_ARB; | |
attribs[i++] = f.redBufferSize(); | |
} | |
if (f.greenBufferSize() != -1) { | |
attribs[i++] = WGL_GREEN_BITS_ARB; | |
attribs[i++] = f.greenBufferSize(); | |
} | |
if (f.blueBufferSize() != -1) { | |
attribs[i++] = WGL_BLUE_BITS_ARB; | |
attribs[i++] = f.blueBufferSize(); | |
} | |
if (f.alpha()) { | |
attribs[i++] = WGL_ALPHA_BITS_ARB; | |
attribs[i++] = f.alphaBufferSize() == -1 ? 8 : f.alphaBufferSize(); | |
} | |
if (f.accum()) { | |
attribs[i++] = WGL_ACCUM_BITS_ARB; | |
attribs[i++] = f.accumBufferSize() == -1 ? 16 : f.accumBufferSize(); | |
} | |
if (f.stencil()) { | |
attribs[i++] = WGL_STENCIL_BITS_ARB; | |
attribs[i++] = f.stencilBufferSize() == -1 ? 8 : f.stencilBufferSize(); | |
} | |
if ((f.redBufferSize() > 8 || f.greenBufferSize() > 8 | |
|| f.blueBufferSize() > 8 || f.alphaBufferSize() > 8) | |
&& (QGLExtensions::glExtensions() & QGLExtensions::NVFloatBuffer)) | |
{ | |
attribs[i++] = WGL_FLOAT_COMPONENTS_NV; | |
attribs[i++] = TRUE; | |
} | |
if (f.sampleBuffers()) { | |
attribs[i++] = WGL_SAMPLE_BUFFERS_ARB; | |
attribs[i++] = 1; | |
attribs[i++] = WGL_SAMPLES_ARB; | |
attribs[i++] = f.samples() == -1 ? 16 : f.samples(); | |
} | |
attribs[i] = 0; | |
} | |
bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidget *shareWidget) | |
{ | |
QGLTemporaryContext tempContext; | |
PFNWGLCREATEPBUFFERARBPROC wglCreatePbufferARB = | |
(PFNWGLCREATEPBUFFERARBPROC) wglGetProcAddress("wglCreatePbufferARB"); | |
PFNWGLGETPBUFFERDCARBPROC wglGetPbufferDCARB = | |
(PFNWGLGETPBUFFERDCARBPROC) wglGetProcAddress("wglGetPbufferDCARB"); | |
PFNWGLQUERYPBUFFERARBPROC wglQueryPbufferARB = | |
(PFNWGLQUERYPBUFFERARBPROC) wglGetProcAddress("wglQueryPbufferARB"); | |
PFNWGLCHOOSEPIXELFORMATARBPROC wglChoosePixelFormatARB = | |
(PFNWGLCHOOSEPIXELFORMATARBPROC) wglGetProcAddress("wglChoosePixelFormatARB"); | |
if (!wglCreatePbufferARB) // assumes that if one can be resolved, all of them can | |
return false; | |
dc = wglGetCurrentDC(); | |
Q_ASSERT(dc); | |
has_render_texture = false; | |
// sample buffers doesn't work in conjunction with the render_texture extension | |
if (!f.sampleBuffers()) { | |
PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB = | |
(PFNWGLGETEXTENSIONSSTRINGARBPROC) wglGetProcAddress("wglGetExtensionsStringARB"); | |
if (wglGetExtensionsStringARB) { | |
QString extensions(QLatin1String(wglGetExtensionsStringARB(dc))); | |
has_render_texture = extensions.contains(QLatin1String("WGL_ARB_render_texture")); | |
} | |
} | |
int attribs[40]; | |
qt_format_to_attrib_list(has_render_texture, f, attribs); | |
// Find pbuffer capable pixel format. | |
unsigned int num_formats = 0; | |
int pixel_format; | |
wglChoosePixelFormatARB(dc, attribs, 0, 1, &pixel_format, &num_formats); | |
// some GL implementations don't support pbuffers with accum | |
// buffers, so try that before we give up | |
if (num_formats == 0 && f.accum()) { | |
QGLFormat tmp = f; | |
tmp.setAccum(false); | |
qt_format_to_attrib_list(has_render_texture, tmp, attribs); | |
wglChoosePixelFormatARB(dc, attribs, 0, 1, &pixel_format, &num_formats); | |
} | |
if (num_formats == 0) { | |
qWarning("QGLPixelBuffer: Unable to find a pixel format with pbuffer - giving up."); | |
return false; | |
} | |
format = pfiToQGLFormat(dc, pixel_format); | |
// NB! The below ONLY works if the width/height are powers of 2. | |
// Set some pBuffer attributes so that we can use this pBuffer as | |
// a 2D RGBA texture target. | |
int pb_attribs[] = {WGL_TEXTURE_FORMAT_ARB, WGL_TEXTURE_RGBA_ARB, | |
WGL_TEXTURE_TARGET_ARB, WGL_TEXTURE_2D_ARB, 0}; | |
pbuf = wglCreatePbufferARB(dc, pixel_format, size.width(), size.height(), | |
has_render_texture ? pb_attribs : 0); | |
if (!pbuf) { | |
// try again without the render_texture extension | |
pbuf = wglCreatePbufferARB(dc, pixel_format, size.width(), size.height(), 0); | |
has_render_texture = false; | |
if (!pbuf) { | |
qWarning("QGLPixelBuffer: Unable to create pbuffer [w=%d, h=%d] - giving up.", size.width(), size.height()); | |
return false; | |
} | |
} | |
dc = wglGetPbufferDCARB(pbuf); | |
ctx = wglCreateContext(dc); | |
if (!dc || !ctx) { | |
qWarning("QGLPixelBuffer: Unable to create pbuffer context - giving up."); | |
return false; | |
} | |
// Explicitly disable the render_texture extension if we have a | |
// multi-sampled pbuffer context. This seems to be a problem only with | |
// ATI cards if multi-sampling is forced globally in the driver. | |
wglMakeCurrent(dc, ctx); | |
GLint samples = 0; | |
glGetIntegerv(GL_SAMPLES_ARB, &samples); | |
if (has_render_texture && samples != 0) | |
has_render_texture = false; | |
HGLRC share_ctx = shareWidget ? shareWidget->d_func()->glcx->d_func()->rc : 0; | |
if (share_ctx && !wglShareLists(share_ctx, ctx)) | |
qWarning("QGLPixelBuffer: Unable to share display lists - with share widget."); | |
int width, height; | |
wglQueryPbufferARB(pbuf, WGL_PBUFFER_WIDTH_ARB, &width); | |
wglQueryPbufferARB(pbuf, WGL_PBUFFER_HEIGHT_ARB, &height); | |
return true; | |
} | |
bool QGLPixelBufferPrivate::cleanup() | |
{ | |
PFNWGLRELEASEPBUFFERDCARBPROC wglReleasePbufferDCARB = | |
(PFNWGLRELEASEPBUFFERDCARBPROC) wglGetProcAddress("wglReleasePbufferDCARB"); | |
PFNWGLDESTROYPBUFFERARBPROC wglDestroyPbufferARB = | |
(PFNWGLDESTROYPBUFFERARBPROC) wglGetProcAddress("wglDestroyPbufferARB"); | |
if (!invalid && wglReleasePbufferDCARB && wglDestroyPbufferARB) { | |
wglReleasePbufferDCARB(pbuf, dc); | |
wglDestroyPbufferARB(pbuf); | |
} | |
return true; | |
} | |
bool QGLPixelBuffer::bindToDynamicTexture(GLuint texture_id) | |
{ | |
Q_D(QGLPixelBuffer); | |
if (d->invalid || !d->has_render_texture) | |
return false; | |
PFNWGLBINDTEXIMAGEARBPROC wglBindTexImageARB = | |
(PFNWGLBINDTEXIMAGEARBPROC) wglGetProcAddress("wglBindTexImageARB"); | |
if (wglBindTexImageARB) { | |
glBindTexture(GL_TEXTURE_2D, texture_id); | |
return wglBindTexImageARB(d->pbuf, WGL_FRONT_LEFT_ARB); | |
} | |
return false; | |
} | |
void QGLPixelBuffer::releaseFromDynamicTexture() | |
{ | |
Q_D(QGLPixelBuffer); | |
if (d->invalid || !d->has_render_texture) | |
return; | |
PFNWGLRELEASETEXIMAGEARBPROC wglReleaseTexImageARB = | |
(PFNWGLRELEASETEXIMAGEARBPROC) wglGetProcAddress("wglReleaseTexImageARB"); | |
if (wglReleaseTexImageARB) | |
wglReleaseTexImageARB(d->pbuf, WGL_FRONT_LEFT_ARB); | |
} | |
bool QGLPixelBuffer::hasOpenGLPbuffers() | |
{ | |
bool ret = false; | |
QGLTemporaryContext *tmpContext = 0; | |
if (!QGLContext::currentContext()) | |
tmpContext = new QGLTemporaryContext; | |
PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB = | |
(PFNWGLGETEXTENSIONSSTRINGARBPROC) wglGetProcAddress("wglGetExtensionsStringARB"); | |
if (wglGetExtensionsStringARB) { | |
QString extensions(QLatin1String(wglGetExtensionsStringARB(wglGetCurrentDC()))); | |
if (extensions.contains(QLatin1String("WGL_ARB_pbuffer")) | |
&& extensions.contains(QLatin1String("WGL_ARB_pixel_format"))) { | |
ret = true; | |
} | |
} | |
if (tmpContext) | |
delete tmpContext; | |
return ret; | |
} | |
QT_END_NAMESPACE |