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Diffstat (limited to 'src/opengl/qglpixelbuffer_win.cpp')
| -rw-r--r-- | src/opengl/qglpixelbuffer_win.cpp | 390 |
1 files changed, 390 insertions, 0 deletions
diff --git a/src/opengl/qglpixelbuffer_win.cpp b/src/opengl/qglpixelbuffer_win.cpp new file mode 100644 index 0000000..e81a576 --- /dev/null +++ b/src/opengl/qglpixelbuffer_win.cpp @@ -0,0 +1,390 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the QtOpenGL module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, 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 appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, 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: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <qglpixelbuffer.h> +#include <qgl.h> +#include <private/qgl_p.h> + +#include <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 + +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; + } + // sample buffers doesn't work in conjunction with the render_texture extension + // so igonre that for now + // 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) +{ + QGLWidget dmy; + dmy.makeCurrent(); // needed for wglGetProcAddress() to succeed + + 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 = GetDC(dmy.winId()); + Q_ASSERT(dc); + + 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."); + ReleaseDC(dmy.winId(), dc); + 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()); + ReleaseDC(dmy.winId(), dc); + return false; + } + } + + ReleaseDC(dmy.winId(), dc); + dc = wglGetPbufferDCARB(pbuf); + ctx = wglCreateContext(dc); + + if (!dc || !ctx) { + qWarning("QGLPixelBuffer: Unable to create pbuffer context - giving up."); + return 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; + QGLWidget *dmy = 0; + if (!QGLContext::currentContext()) { + dmy = new QGLWidget; + dmy->makeCurrent(); + } + 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 (dmy) + delete dmy; + return ret; +} + +QT_END_NAMESPACE |