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Diffstat (limited to 'src/opengl/qglpixelbuffer_x11.cpp')
| -rw-r--r-- | src/opengl/qglpixelbuffer_x11.cpp | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/src/opengl/qglpixelbuffer_x11.cpp b/src/opengl/qglpixelbuffer_x11.cpp new file mode 100644 index 0000000..0804503 --- /dev/null +++ b/src/opengl/qglpixelbuffer_x11.cpp @@ -0,0 +1,301 @@ +/**************************************************************************** +** +** 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 <qlibrary.h> +#include <qdebug.h> +#include <private/qgl_p.h> +#include <private/qt_x11_p.h> +#include <private/qpaintengine_opengl_p.h> + +#include <qx11info_x11.h> +#include <GL/glx.h> +#include <qimage.h> + +#include "qglpixelbuffer.h" +#include "qglpixelbuffer_p.h" + +#if defined(Q_OS_LINUX) || defined(Q_OS_BSD4) +#include <dlfcn.h> +#endif + +QT_BEGIN_NAMESPACE + +#ifndef GLX_VERSION_1_3 +#define GLX_RGBA_BIT 0x00000002 +#define GLX_PBUFFER_BIT 0x00000004 +#define GLX_DRAWABLE_TYPE 0x8010 +#define GLX_RENDER_TYPE 0x8011 +#define GLX_RGBA_TYPE 0x8014 +#define GLX_PBUFFER_HEIGHT 0x8040 +#define GLX_PBUFFER_WIDTH 0x8041 +#endif + +#ifndef GLX_ARB_multisample +#define GLX_SAMPLE_BUFFERS_ARB 100000 +#define GLX_SAMPLES_ARB 100001 +#endif + +typedef GLXFBConfig* (*_glXChooseFBConfig) (Display *dpy, int screen, const int *attrib_list, int *nelements); +typedef int (*_glXGetFBConfigAttrib) (Display *dpy, GLXFBConfig config, int attribute, int *value); +typedef GLXPbuffer (*_glXCreatePbuffer) (Display *dpy, GLXFBConfig config, const int *attrib_list); +typedef void (*_glXDestroyPbuffer) (Display *dpy, GLXPbuffer pbuf); +typedef GLXContext (*_glXCreateNewContext) (Display *dpy, GLXFBConfig config, int render_type, GLXContext share_list, Bool direct); +typedef Bool (*_glXMakeContextCurrent) (Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx); + +static _glXChooseFBConfig qt_glXChooseFBConfig = 0; +static _glXCreateNewContext qt_glXCreateNewContext = 0; +static _glXCreatePbuffer qt_glXCreatePbuffer = 0; +static _glXDestroyPbuffer qt_glXDestroyPbuffer = 0; +static _glXGetFBConfigAttrib qt_glXGetFBConfigAttrib = 0; +static _glXMakeContextCurrent qt_glXMakeContextCurrent = 0; + +#define glXChooseFBConfig qt_glXChooseFBConfig +#define glXCreateNewContext qt_glXCreateNewContext +#define glXCreatePbuffer qt_glXCreatePbuffer +#define glXDestroyPbuffer qt_glXDestroyPbuffer +#define glXGetFBConfigAttrib qt_glXGetFBConfigAttrib +#define glXMakeContextCurrent qt_glXMakeContextCurrent + +static bool qt_resolve_pbuffer_extensions() +{ + static int resolved = false; + if (resolved && qt_glXMakeContextCurrent) + return true; + else if (resolved) + return false; + +#if defined(Q_OS_LINUX) || defined(Q_OS_BSD4) + void *handle = dlopen(NULL, RTLD_LAZY); + if (handle) { + qt_glXChooseFBConfig = (_glXChooseFBConfig) dlsym(handle, "glXChooseFBConfig"); + qt_glXCreateNewContext = (_glXCreateNewContext) dlsym(handle, "glXCreateNewContext"); + qt_glXCreatePbuffer = (_glXCreatePbuffer) dlsym(handle, "glXCreatePbuffer"); + qt_glXDestroyPbuffer = (_glXDestroyPbuffer) dlsym(handle, "glXDestroyPbuffer"); + qt_glXGetFBConfigAttrib = (_glXGetFBConfigAttrib) dlsym(handle, "glXGetFBConfigAttrib"); + qt_glXMakeContextCurrent = (_glXMakeContextCurrent) dlsym(handle, "glXMakeContextCurrent"); + dlclose(handle); + } + if (!qt_glXChooseFBConfig) +#endif + { + extern const QString qt_gl_library_name(); + QLibrary gl(qt_gl_library_name()); + qt_glXChooseFBConfig = (_glXChooseFBConfig) gl.resolve("glXChooseFBConfig"); + qt_glXCreateNewContext = (_glXCreateNewContext) gl.resolve("glXCreateNewContext"); + qt_glXCreatePbuffer = (_glXCreatePbuffer) gl.resolve("glXCreatePbuffer"); + qt_glXDestroyPbuffer = (_glXDestroyPbuffer) gl.resolve("glXDestroyPbuffer"); + qt_glXGetFBConfigAttrib = (_glXGetFBConfigAttrib) gl.resolve("glXGetFBConfigAttrib"); + qt_glXMakeContextCurrent = (_glXMakeContextCurrent) gl.resolve("glXMakeContextCurrent"); + } + + resolved = qt_glXMakeContextCurrent ? true : false; + return resolved; +} + +static void qt_format_to_attrib_list(const QGLFormat &f, int attribs[]) +{ + int i = 0; + attribs[i++] = GLX_RENDER_TYPE; + attribs[i++] = GLX_RGBA_BIT; + attribs[i++] = GLX_DRAWABLE_TYPE; + attribs[i++] = GLX_PBUFFER_BIT; + attribs[i++] = GLX_RED_SIZE; + attribs[i++] = f.redBufferSize() == -1 ? 1 : f.redBufferSize(); + attribs[i++] = GLX_GREEN_SIZE; + attribs[i++] = f.greenBufferSize() == -1 ? 1 : f.greenBufferSize(); + attribs[i++] = GLX_BLUE_SIZE; + attribs[i++] = f.blueBufferSize() == -1 ? 1 : f.blueBufferSize(); + if (f.doubleBuffer()) { + attribs[i++] = GLX_DOUBLEBUFFER; + attribs[i++] = true; + } + if (f.depth()) { + attribs[i++] = GLX_DEPTH_SIZE; + attribs[i++] = f.depthBufferSize() == -1 ? 1 : f.depthBufferSize(); + } + if (f.stereo()) { + attribs[i++] = GLX_STEREO; + attribs[i++] = true; + } + if (f.stencil()) { + attribs[i++] = GLX_STENCIL_SIZE; + attribs[i++] = f.stencilBufferSize() == -1 ? 1 : f.stencilBufferSize(); + } + if (f.alpha()) { + attribs[i++] = GLX_ALPHA_SIZE; + attribs[i++] = f.alphaBufferSize() == -1 ? 1 : f.alphaBufferSize(); + } + if (f.accum()) { + attribs[i++] = GLX_ACCUM_RED_SIZE; + attribs[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize(); + attribs[i++] = GLX_ACCUM_GREEN_SIZE; + attribs[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize(); + attribs[i++] = GLX_ACCUM_BLUE_SIZE; + attribs[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize(); + if (f.alpha()) { + attribs[i++] = GLX_ACCUM_ALPHA_SIZE; + attribs[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize(); + } + } + if (f.sampleBuffers()) { + attribs[i++] = GLX_SAMPLE_BUFFERS_ARB; + attribs[i++] = 1; + attribs[i++] = GLX_SAMPLES_ARB; + attribs[i++] = f.samples() == -1 ? 4 : f.samples(); + } + + attribs[i] = XNone; +} + +bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidget *shareWidget) +{ + if (!qt_resolve_pbuffer_extensions()) { + qWarning("QGLPixelBuffer: pbuffers are not supported on this system."); + return false; + } + + int attribs[40]; + int num_configs = 0; + + qt_format_to_attrib_list(f, attribs); + + GLXFBConfig *configs = glXChooseFBConfig(X11->display, X11->defaultScreen, attribs, &num_configs); + if (configs && num_configs) { + int res; + glXGetFBConfigAttrib(X11->display, configs[0], GLX_LEVEL, &res); + format.setPlane(res); + glXGetFBConfigAttrib(X11->display, configs[0], GLX_DOUBLEBUFFER, &res); + format.setDoubleBuffer(res); + glXGetFBConfigAttrib(X11->display, configs[0], GLX_DEPTH_SIZE, &res); + format.setDepth(res); + if (format.depth()) + format.setDepthBufferSize(res); + glXGetFBConfigAttrib(X11->display, configs[0], GLX_RGBA, &res); + format.setRgba(res); + glXGetFBConfigAttrib(X11->display, configs[0], GLX_RED_SIZE, &res); + format.setRedBufferSize(res); + glXGetFBConfigAttrib(X11->display, configs[0], GLX_GREEN_SIZE, &res); + format.setGreenBufferSize(res); + glXGetFBConfigAttrib(X11->display, configs[0], GLX_BLUE_SIZE, &res); + format.setBlueBufferSize(res); + glXGetFBConfigAttrib(X11->display, configs[0], GLX_ALPHA_SIZE, &res); + format.setAlpha(res); + if (format.alpha()) + format.setAlphaBufferSize(res); + glXGetFBConfigAttrib(X11->display, configs[0], GLX_ACCUM_RED_SIZE, &res); + format.setAccum(res); + if (format.accum()) + format.setAccumBufferSize(res); + glXGetFBConfigAttrib(X11->display, configs[0], GLX_STENCIL_SIZE, &res); + format.setStencil(res); + if (format.stencil()) + format.setStencilBufferSize(res); + glXGetFBConfigAttrib(X11->display, configs[0], GLX_STEREO, &res); + format.setStereo(res); + glXGetFBConfigAttrib(X11->display, configs[0], GLX_SAMPLE_BUFFERS_ARB, &res); + format.setSampleBuffers(res); + if (format.sampleBuffers()) { + glXGetFBConfigAttrib(X11->display, configs[0], GLX_SAMPLES_ARB, &res); + format.setSamples(res); + } + + int pb_attribs[] = {GLX_PBUFFER_WIDTH, size.width(), GLX_PBUFFER_HEIGHT, size.height(), XNone}; + GLXContext shareContext = 0; + if (shareWidget && shareWidget->d_func()->glcx) + shareContext = (GLXContext) shareWidget->d_func()->glcx->d_func()->cx; + + pbuf = glXCreatePbuffer(QX11Info::display(), configs[0], pb_attribs); + ctx = glXCreateNewContext(QX11Info::display(), configs[0], GLX_RGBA_TYPE, shareContext, true); + + XFree(configs); + if (!pbuf || !ctx) { + qWarning("QGLPixelBuffer: Unable to create a pbuffer/context - giving up."); + return false; + } + return true; + } else { + qWarning("QGLPixelBuffer: Unable to find a context/format match - giving up."); + return false; + } +} + +bool QGLPixelBufferPrivate::cleanup() +{ + glXDestroyPbuffer(QX11Info::display(), pbuf); + return true; +} + +bool QGLPixelBuffer::bindToDynamicTexture(GLuint) +{ + return false; +} + +void QGLPixelBuffer::releaseFromDynamicTexture() +{ +} + +bool QGLPixelBuffer::hasOpenGLPbuffers() +{ + bool ret = qt_resolve_pbuffer_extensions(); + + if (!ret) + return false; + + int attribs[40]; + int num_configs = 0; + + qt_format_to_attrib_list(QGLFormat::defaultFormat(), attribs); + + GLXFBConfig *configs = glXChooseFBConfig(X11->display, X11->defaultScreen, attribs, &num_configs); + GLXPbuffer pbuf = 0; + GLXContext ctx = 0; + + if (configs && num_configs) { + int pb_attribs[] = {GLX_PBUFFER_WIDTH, 128, GLX_PBUFFER_HEIGHT, 128, XNone}; + pbuf = glXCreatePbuffer(X11->display, configs[0], pb_attribs); + ctx = glXCreateNewContext(X11->display, configs[0], GLX_RGBA_TYPE, 0, true); + XFree(configs); + glXDestroyContext(X11->display, ctx); + glXDestroyPbuffer(X11->display, pbuf); + } + return pbuf && ctx; +} + +QT_END_NAMESPACE |