From 6ee65dc4785b9f38cfd7405a5535c88feb3a0ea1 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?J=C3=B8rgen=20Lind?= Date: Thu, 9 Jun 2011 15:56:55 +0200 Subject: QtPlatformSupport: A helper library for platform plugins QtPlatformSupport is a static library. Platform plugins are meant to link against this library to pull in dependencies such as fontengines and convenience functions for finding the right GL configs. The linker will only pull in the symbols used, so the size of the library doesn't really matter --- .../glxconvenience/glxconvenience.pri | 6 + .../glxconvenience/qglxconvenience.cpp | 225 +++++++++++++++++++++ .../glxconvenience/qglxconvenience_p.h | 57 ++++++ 3 files changed, 288 insertions(+) create mode 100644 src/platformsupport/glxconvenience/glxconvenience.pri create mode 100644 src/platformsupport/glxconvenience/qglxconvenience.cpp create mode 100644 src/platformsupport/glxconvenience/qglxconvenience_p.h (limited to 'src/platformsupport/glxconvenience') diff --git a/src/platformsupport/glxconvenience/glxconvenience.pri b/src/platformsupport/glxconvenience/glxconvenience.pri new file mode 100644 index 0000000000..5b65e13306 --- /dev/null +++ b/src/platformsupport/glxconvenience/glxconvenience.pri @@ -0,0 +1,6 @@ +contains(QT_CONFIG,xlib) { + contains(QT_CONFIG,opengl):!contains(QT_CONFIG,opengles2) { + HEADERS += $$PWD/qglxconvenience_p.h + SOURCES += $$PWD/qglxconvenience.cpp + } +} diff --git a/src/platformsupport/glxconvenience/qglxconvenience.cpp b/src/platformsupport/glxconvenience/qglxconvenience.cpp new file mode 100644 index 0000000000..fc506df3bd --- /dev/null +++ b/src/platformsupport/glxconvenience/qglxconvenience.cpp @@ -0,0 +1,225 @@ +/**************************************************************************** +** +** 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 plugins 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 +** 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. +** +** 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. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qglxconvenience_p.h" + +#include + +#ifndef QT_NO_XRENDER +#include +#endif + +enum { + XFocusOut = FocusOut, + XFocusIn = FocusIn, + XKeyPress = KeyPress, + XKeyRelease = KeyRelease, + XNone = None, + XRevertToParent = RevertToParent, + XGrayScale = GrayScale, + XCursorShape = CursorShape +}; +#undef FocusOut +#undef FocusIn +#undef KeyPress +#undef KeyRelease +#undef None +#undef RevertToParent +#undef GrayScale +#undef CursorShape + +#ifdef FontChange +#undef FontChange +#endif + +QVector qglx_buildSpec(const QGuiGLFormat &format, int drawableBit) +{ + QVector spec(48); + int i = 0; + + spec[i++] = GLX_LEVEL; + spec[i++] = 0; + spec[i++] = GLX_DRAWABLE_TYPE; spec[i++] = drawableBit; + + spec[i++] = GLX_RENDER_TYPE; spec[i++] = GLX_RGBA_BIT; + + spec[i++] = GLX_RED_SIZE; spec[i++] = (format.redBufferSize() == -1) ? 1 : format.redBufferSize(); + spec[i++] = GLX_GREEN_SIZE; spec[i++] = (format.greenBufferSize() == -1) ? 1 : format.greenBufferSize(); + spec[i++] = GLX_BLUE_SIZE; spec[i++] = (format.blueBufferSize() == -1) ? 1 : format.blueBufferSize(); + if (format.hasAlpha()) { + spec[i++] = GLX_ALPHA_SIZE; spec[i++] = format.alphaBufferSize(); + } + + spec[i++] = GLX_DOUBLEBUFFER; spec[i++] = format.swapBehavior() != QGuiGLFormat::SingleBuffer ? True : False; + + spec[i++] = GLX_STEREO; spec[i++] = format.stereo() ? True : False; + + if (format.depthBufferSize() > 0) { + spec[i++] = GLX_DEPTH_SIZE; spec[i++] = format.depthBufferSize(); + } + + if (format.stencilBufferSize() > 0) { + spec[i++] = GLX_STENCIL_SIZE; spec[i++] = (format.stencilBufferSize() == -1) ? 1 : format.stencilBufferSize(); + } + + if (format.samples() > 1) { + spec[i++] = GLX_SAMPLE_BUFFERS_ARB; + spec[i++] = 1; + spec[i++] = GLX_SAMPLES_ARB; + spec[i++] = format.samples(); + } + + spec[i++] = XNone; + return spec; +} + +GLXFBConfig qglx_findConfig(Display *display, int screen , const QGuiGLFormat &format, int drawableBit) +{ + bool reduced = true; + GLXFBConfig chosenConfig = 0; + QGuiGLFormat reducedFormat = format; + while (!chosenConfig && reduced) { + QVector spec = qglx_buildSpec(reducedFormat, drawableBit); + int confcount = 0; + GLXFBConfig *configs; + configs = glXChooseFBConfig(display, screen,spec.constData(),&confcount); + if (confcount) + { + for (int i = 0; i < confcount; i++) { + chosenConfig = configs[i]; + // Make sure we try to get an ARGB visual if the format asked for an alpha: + if (reducedFormat.hasAlpha()) { + int alphaSize; + glXGetFBConfigAttrib(display,configs[i],GLX_ALPHA_SIZE,&alphaSize); + if (alphaSize > 0) { + XVisualInfo *visual = glXGetVisualFromFBConfig(display, chosenConfig); +#if !defined(QT_NO_XRENDER) + XRenderPictFormat *pictFormat = XRenderFindVisualFormat(display, visual->visual); + if (pictFormat->direct.alphaMask > 0) + break; +#else + if (visual->depth == 32) + break; +#endif + } + } else { + break; // Just choose the first in the list if there's no alpha requested + } + } + + XFree(configs); + } + reducedFormat = qglx_reduceGuiGLFormat(reducedFormat,&reduced); + } + + if (!chosenConfig) + qWarning("Warning: no suitable glx confiuration found"); + + return chosenConfig; +} + +XVisualInfo *qglx_findVisualInfo(Display *display, int screen, const QGuiGLFormat &format) +{ + GLXFBConfig config = qglx_findConfig(display,screen,format); + XVisualInfo *visualInfo = glXGetVisualFromFBConfig(display,config); + return visualInfo; +} + +QGuiGLFormat qglx_guiGLFormatFromGLXFBConfig(Display *display, GLXFBConfig config, GLXContext) +{ + QGuiGLFormat format; + int redSize = 0; + int greenSize = 0; + int blueSize = 0; + int alphaSize = 0; + int depthSize = 0; + int stencilSize = 0; + int sampleBuffers = 0; + int sampleCount = 0; + int stereo = 0; + + XVisualInfo *vi = glXGetVisualFromFBConfig(display,config); + XFree(vi); + glXGetFBConfigAttrib(display, config, GLX_RED_SIZE, &redSize); + glXGetFBConfigAttrib(display, config, GLX_GREEN_SIZE, &greenSize); + glXGetFBConfigAttrib(display, config, GLX_BLUE_SIZE, &blueSize); + glXGetFBConfigAttrib(display, config, GLX_ALPHA_SIZE, &alphaSize); + glXGetFBConfigAttrib(display, config, GLX_DEPTH_SIZE, &depthSize); + glXGetFBConfigAttrib(display, config, GLX_STENCIL_SIZE, &stencilSize); + glXGetFBConfigAttrib(display, config, GLX_SAMPLES, &sampleBuffers); + glXGetFBConfigAttrib(display, config, GLX_STEREO, &stereo); + + format.setRedBufferSize(redSize); + format.setGreenBufferSize(greenSize); + format.setBlueBufferSize(blueSize); + format.setAlphaBufferSize(alphaSize); + format.setDepthBufferSize(depthSize); + format.setStencilBufferSize(stencilSize); + if (sampleBuffers) { + glXGetFBConfigAttrib(display, config, GLX_SAMPLES_ARB, &sampleCount); + format.setSamples(sampleCount); + } + + format.setStereo(stereo); + + return format; +} + +QGuiGLFormat qglx_reduceGuiGLFormat(const QGuiGLFormat &format, bool *reduced) +{ + QGuiGLFormat retFormat = format; + *reduced = true; + + if (retFormat.samples() > 1) { + retFormat.setSamples(0); + } else if (retFormat.stereo()) { + retFormat.setStereo(false); + }else if (retFormat.stencilBufferSize() > 0) { + retFormat.setStencilBufferSize(0); + }else if (retFormat.hasAlpha()) { + retFormat.setAlphaBufferSize(0); + }else if (retFormat.depthBufferSize() > 0) { + retFormat.setDepthBufferSize(0); + }else{ + *reduced = false; + } + return retFormat; +} diff --git a/src/platformsupport/glxconvenience/qglxconvenience_p.h b/src/platformsupport/glxconvenience/qglxconvenience_p.h new file mode 100644 index 0000000000..1a0510067b --- /dev/null +++ b/src/platformsupport/glxconvenience/qglxconvenience_p.h @@ -0,0 +1,57 @@ +/**************************************************************************** +** +** 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 plugins 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 +** 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. +** +** 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. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QGLXCONVENIENCE_H +#define QGLXCONVENIENCE_H + +#include +#include + +#include +#include + +XVisualInfo *qglx_findVisualInfo(Display *display, int screen, const QGuiGLFormat &format); +GLXFBConfig qglx_findConfig(Display *display, int screen, const QGuiGLFormat &format, int drawableBit = GLX_WINDOW_BIT); +QGuiGLFormat qglx_guiGLFormatFromGLXFBConfig(Display *display, GLXFBConfig config, GLXContext context); +QVector qglx_buildSpec(const QGuiGLFormat &format, int drawableBit = GLX_WINDOW_BIT); +QGuiGLFormat qglx_reduceGuiGLFormat(const QGuiGLFormat &format, bool *reduced); + +#endif // QGLXCONVENIENCE_H -- cgit v1.2.3