--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/opengl/qglpixelbuffer_win.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,390 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#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
+
+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