/**************************************************************************** ** ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/legal ** ** This file is part of the QtOpenGL module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:LGPL$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and Digia. For licensing terms and ** conditions see http://qt.digia.com/licensing. For further information ** use the contact form at http://qt.digia.com/contact-us. ** ** 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, Digia gives you certain additional ** rights. These rights are described in the Digia 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: http://www.gnu.org/copyleft/gpl.html. ** ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #include #include #include #include #include #include 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}; int pb_attribs_null[] = {0}; pbuf = wglCreatePbufferARB(dc, pixel_format, size.width(), size.height(), has_render_texture ? pb_attribs : pb_attribs_null); if (!pbuf) { // try again without the render_texture extension pbuf = wglCreatePbufferARB(dc, pixel_format, size.width(), size.height(), pb_attribs_null); 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