[2] | 1 | /****************************************************************************
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| 2 | **
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[846] | 3 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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[561] | 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation ([email protected])
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[2] | 6 | **
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| 7 | ** This file is part of the QtOpenGL module of the Qt Toolkit.
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| 8 | **
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| 9 | ** $QT_BEGIN_LICENSE:LGPL$
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| 10 | ** Commercial Usage
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| 11 | ** Licensees holding valid Qt Commercial licenses may use this file in
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| 12 | ** accordance with the Qt Commercial License Agreement provided with the
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| 13 | ** Software or, alternatively, in accordance with the terms contained in
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| 14 | ** a written agreement between you and Nokia.
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| 15 | **
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| 16 | ** GNU Lesser General Public License Usage
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| 17 | ** Alternatively, this file may be used under the terms of the GNU Lesser
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| 18 | ** General Public License version 2.1 as published by the Free Software
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| 19 | ** Foundation and appearing in the file LICENSE.LGPL included in the
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| 20 | ** packaging of this file. Please review the following information to
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| 21 | ** ensure the GNU Lesser General Public License version 2.1 requirements
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| 22 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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| 23 | **
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[561] | 24 | ** In addition, as a special exception, Nokia gives you certain additional
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| 25 | ** rights. These rights are described in the Nokia Qt LGPL Exception
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| 26 | ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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[2] | 27 | **
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| 28 | ** GNU General Public License Usage
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| 29 | ** Alternatively, this file may be used under the terms of the GNU
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| 30 | ** General Public License version 3.0 as published by the Free Software
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| 31 | ** Foundation and appearing in the file LICENSE.GPL included in the
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| 32 | ** packaging of this file. Please review the following information to
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| 33 | ** ensure the GNU General Public License version 3.0 requirements will be
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| 34 | ** met: http://www.gnu.org/copyleft/gpl.html.
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| 35 | **
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[561] | 36 | ** If you have questions regarding the use of this file, please contact
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| 37 | ** Nokia at [email protected].
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[2] | 38 | ** $QT_END_LICENSE$
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| 39 | **
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| 40 | ****************************************************************************/
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| 41 | #include <qlibrary.h>
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| 42 | #include <qdebug.h>
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| 43 | #include <private/qgl_p.h>
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| 44 | #include <private/qt_x11_p.h>
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| 45 | #include <private/qpaintengine_opengl_p.h>
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| 46 |
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| 47 | #include <qx11info_x11.h>
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| 48 | #include <GL/glx.h>
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| 49 | #include <qimage.h>
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| 50 |
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| 51 | #include "qglpixelbuffer.h"
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| 52 | #include "qglpixelbuffer_p.h"
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| 53 |
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| 54 | #if defined(Q_OS_LINUX) || defined(Q_OS_BSD4)
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| 55 | #include <dlfcn.h>
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| 56 | #endif
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| 57 |
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| 58 | QT_BEGIN_NAMESPACE
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| 59 |
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| 60 | #ifndef GLX_VERSION_1_3
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| 61 | #define GLX_RGBA_BIT 0x00000002
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| 62 | #define GLX_PBUFFER_BIT 0x00000004
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| 63 | #define GLX_DRAWABLE_TYPE 0x8010
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| 64 | #define GLX_RENDER_TYPE 0x8011
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| 65 | #define GLX_RGBA_TYPE 0x8014
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| 66 | #define GLX_PBUFFER_HEIGHT 0x8040
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| 67 | #define GLX_PBUFFER_WIDTH 0x8041
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| 68 | #endif
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| 69 |
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| 70 | #ifndef GLX_ARB_multisample
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| 71 | #define GLX_SAMPLE_BUFFERS_ARB 100000
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| 72 | #define GLX_SAMPLES_ARB 100001
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| 73 | #endif
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| 74 |
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| 75 | typedef GLXFBConfig* (*_glXChooseFBConfig) (Display *dpy, int screen, const int *attrib_list, int *nelements);
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| 76 | typedef int (*_glXGetFBConfigAttrib) (Display *dpy, GLXFBConfig config, int attribute, int *value);
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| 77 | typedef GLXPbuffer (*_glXCreatePbuffer) (Display *dpy, GLXFBConfig config, const int *attrib_list);
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| 78 | typedef void (*_glXDestroyPbuffer) (Display *dpy, GLXPbuffer pbuf);
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| 79 | typedef GLXContext (*_glXCreateNewContext) (Display *dpy, GLXFBConfig config, int render_type, GLXContext share_list, Bool direct);
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| 80 | typedef Bool (*_glXMakeContextCurrent) (Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx);
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| 81 |
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| 82 | static _glXChooseFBConfig qt_glXChooseFBConfig = 0;
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| 83 | static _glXCreateNewContext qt_glXCreateNewContext = 0;
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| 84 | static _glXCreatePbuffer qt_glXCreatePbuffer = 0;
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| 85 | static _glXDestroyPbuffer qt_glXDestroyPbuffer = 0;
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| 86 | static _glXGetFBConfigAttrib qt_glXGetFBConfigAttrib = 0;
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| 87 | static _glXMakeContextCurrent qt_glXMakeContextCurrent = 0;
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| 88 |
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| 89 | #define glXChooseFBConfig qt_glXChooseFBConfig
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| 90 | #define glXCreateNewContext qt_glXCreateNewContext
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| 91 | #define glXCreatePbuffer qt_glXCreatePbuffer
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| 92 | #define glXDestroyPbuffer qt_glXDestroyPbuffer
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| 93 | #define glXGetFBConfigAttrib qt_glXGetFBConfigAttrib
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| 94 | #define glXMakeContextCurrent qt_glXMakeContextCurrent
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| 95 |
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[561] | 96 | extern void* qglx_getProcAddress(const char* procName); // in qgl_x11.cpp
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| 97 |
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[2] | 98 | static bool qt_resolve_pbuffer_extensions()
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| 99 | {
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| 100 | static int resolved = false;
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| 101 | if (resolved && qt_glXMakeContextCurrent)
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| 102 | return true;
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| 103 | else if (resolved)
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| 104 | return false;
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| 105 |
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[561] | 106 | qt_glXChooseFBConfig = (_glXChooseFBConfig) qglx_getProcAddress("glXChooseFBConfig");
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| 107 | qt_glXCreateNewContext = (_glXCreateNewContext) qglx_getProcAddress("glXCreateNewContext");
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| 108 | qt_glXCreatePbuffer = (_glXCreatePbuffer) qglx_getProcAddress("glXCreatePbuffer");
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| 109 | qt_glXDestroyPbuffer = (_glXDestroyPbuffer) qglx_getProcAddress("glXDestroyPbuffer");
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| 110 | qt_glXGetFBConfigAttrib = (_glXGetFBConfigAttrib) qglx_getProcAddress("glXGetFBConfigAttrib");
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| 111 | qt_glXMakeContextCurrent = (_glXMakeContextCurrent) qglx_getProcAddress("glXMakeContextCurrent");
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[2] | 112 |
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| 113 | resolved = qt_glXMakeContextCurrent ? true : false;
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| 114 | return resolved;
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| 115 | }
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| 116 |
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| 117 | static void qt_format_to_attrib_list(const QGLFormat &f, int attribs[])
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| 118 | {
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| 119 | int i = 0;
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| 120 | attribs[i++] = GLX_RENDER_TYPE;
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| 121 | attribs[i++] = GLX_RGBA_BIT;
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| 122 | attribs[i++] = GLX_DRAWABLE_TYPE;
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| 123 | attribs[i++] = GLX_PBUFFER_BIT;
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| 124 | attribs[i++] = GLX_RED_SIZE;
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| 125 | attribs[i++] = f.redBufferSize() == -1 ? 1 : f.redBufferSize();
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| 126 | attribs[i++] = GLX_GREEN_SIZE;
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| 127 | attribs[i++] = f.greenBufferSize() == -1 ? 1 : f.greenBufferSize();
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| 128 | attribs[i++] = GLX_BLUE_SIZE;
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| 129 | attribs[i++] = f.blueBufferSize() == -1 ? 1 : f.blueBufferSize();
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| 130 | if (f.doubleBuffer()) {
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| 131 | attribs[i++] = GLX_DOUBLEBUFFER;
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| 132 | attribs[i++] = true;
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| 133 | }
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| 134 | if (f.depth()) {
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| 135 | attribs[i++] = GLX_DEPTH_SIZE;
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| 136 | attribs[i++] = f.depthBufferSize() == -1 ? 1 : f.depthBufferSize();
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| 137 | }
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| 138 | if (f.stereo()) {
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| 139 | attribs[i++] = GLX_STEREO;
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| 140 | attribs[i++] = true;
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| 141 | }
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| 142 | if (f.stencil()) {
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| 143 | attribs[i++] = GLX_STENCIL_SIZE;
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| 144 | attribs[i++] = f.stencilBufferSize() == -1 ? 1 : f.stencilBufferSize();
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| 145 | }
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| 146 | if (f.alpha()) {
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| 147 | attribs[i++] = GLX_ALPHA_SIZE;
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| 148 | attribs[i++] = f.alphaBufferSize() == -1 ? 1 : f.alphaBufferSize();
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| 149 | }
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| 150 | if (f.accum()) {
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| 151 | attribs[i++] = GLX_ACCUM_RED_SIZE;
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| 152 | attribs[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize();
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| 153 | attribs[i++] = GLX_ACCUM_GREEN_SIZE;
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| 154 | attribs[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize();
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| 155 | attribs[i++] = GLX_ACCUM_BLUE_SIZE;
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| 156 | attribs[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize();
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| 157 | if (f.alpha()) {
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| 158 | attribs[i++] = GLX_ACCUM_ALPHA_SIZE;
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| 159 | attribs[i++] = f.accumBufferSize() == -1 ? 1 : f.accumBufferSize();
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| 160 | }
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| 161 | }
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| 162 | if (f.sampleBuffers()) {
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| 163 | attribs[i++] = GLX_SAMPLE_BUFFERS_ARB;
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| 164 | attribs[i++] = 1;
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| 165 | attribs[i++] = GLX_SAMPLES_ARB;
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| 166 | attribs[i++] = f.samples() == -1 ? 4 : f.samples();
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| 167 | }
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| 168 |
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| 169 | attribs[i] = XNone;
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| 170 | }
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| 171 |
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| 172 | bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidget *shareWidget)
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| 173 | {
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| 174 | if (!qt_resolve_pbuffer_extensions()) {
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| 175 | qWarning("QGLPixelBuffer: pbuffers are not supported on this system.");
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| 176 | return false;
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| 177 | }
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| 178 |
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| 179 | int attribs[40];
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| 180 | int num_configs = 0;
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| 181 |
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| 182 | qt_format_to_attrib_list(f, attribs);
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| 183 |
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[769] | 184 | int screen = X11->defaultScreen;
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| 185 | if (shareWidget)
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| 186 | screen = shareWidget->x11Info().screen();
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| 187 |
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| 188 | GLXFBConfig *configs = glXChooseFBConfig(X11->display, screen, attribs, &num_configs);
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[2] | 189 | if (configs && num_configs) {
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| 190 | int res;
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| 191 | glXGetFBConfigAttrib(X11->display, configs[0], GLX_LEVEL, &res);
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| 192 | format.setPlane(res);
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| 193 | glXGetFBConfigAttrib(X11->display, configs[0], GLX_DOUBLEBUFFER, &res);
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| 194 | format.setDoubleBuffer(res);
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| 195 | glXGetFBConfigAttrib(X11->display, configs[0], GLX_DEPTH_SIZE, &res);
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| 196 | format.setDepth(res);
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| 197 | if (format.depth())
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| 198 | format.setDepthBufferSize(res);
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| 199 | glXGetFBConfigAttrib(X11->display, configs[0], GLX_RGBA, &res);
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| 200 | format.setRgba(res);
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| 201 | glXGetFBConfigAttrib(X11->display, configs[0], GLX_RED_SIZE, &res);
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| 202 | format.setRedBufferSize(res);
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| 203 | glXGetFBConfigAttrib(X11->display, configs[0], GLX_GREEN_SIZE, &res);
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| 204 | format.setGreenBufferSize(res);
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| 205 | glXGetFBConfigAttrib(X11->display, configs[0], GLX_BLUE_SIZE, &res);
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| 206 | format.setBlueBufferSize(res);
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| 207 | glXGetFBConfigAttrib(X11->display, configs[0], GLX_ALPHA_SIZE, &res);
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| 208 | format.setAlpha(res);
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| 209 | if (format.alpha())
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| 210 | format.setAlphaBufferSize(res);
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| 211 | glXGetFBConfigAttrib(X11->display, configs[0], GLX_ACCUM_RED_SIZE, &res);
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| 212 | format.setAccum(res);
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| 213 | if (format.accum())
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| 214 | format.setAccumBufferSize(res);
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| 215 | glXGetFBConfigAttrib(X11->display, configs[0], GLX_STENCIL_SIZE, &res);
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| 216 | format.setStencil(res);
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| 217 | if (format.stencil())
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| 218 | format.setStencilBufferSize(res);
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| 219 | glXGetFBConfigAttrib(X11->display, configs[0], GLX_STEREO, &res);
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| 220 | format.setStereo(res);
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| 221 | glXGetFBConfigAttrib(X11->display, configs[0], GLX_SAMPLE_BUFFERS_ARB, &res);
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| 222 | format.setSampleBuffers(res);
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| 223 | if (format.sampleBuffers()) {
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| 224 | glXGetFBConfigAttrib(X11->display, configs[0], GLX_SAMPLES_ARB, &res);
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| 225 | format.setSamples(res);
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| 226 | }
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| 227 |
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| 228 | int pb_attribs[] = {GLX_PBUFFER_WIDTH, size.width(), GLX_PBUFFER_HEIGHT, size.height(), XNone};
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| 229 | GLXContext shareContext = 0;
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| 230 | if (shareWidget && shareWidget->d_func()->glcx)
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| 231 | shareContext = (GLXContext) shareWidget->d_func()->glcx->d_func()->cx;
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| 232 |
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| 233 | pbuf = glXCreatePbuffer(QX11Info::display(), configs[0], pb_attribs);
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| 234 | ctx = glXCreateNewContext(QX11Info::display(), configs[0], GLX_RGBA_TYPE, shareContext, true);
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| 235 |
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| 236 | XFree(configs);
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| 237 | if (!pbuf || !ctx) {
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| 238 | qWarning("QGLPixelBuffer: Unable to create a pbuffer/context - giving up.");
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| 239 | return false;
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| 240 | }
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| 241 | return true;
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| 242 | } else {
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| 243 | qWarning("QGLPixelBuffer: Unable to find a context/format match - giving up.");
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| 244 | return false;
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| 245 | }
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| 246 | }
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| 247 |
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| 248 | bool QGLPixelBufferPrivate::cleanup()
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| 249 | {
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| 250 | glXDestroyPbuffer(QX11Info::display(), pbuf);
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| 251 | return true;
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| 252 | }
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| 253 |
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| 254 | bool QGLPixelBuffer::bindToDynamicTexture(GLuint)
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| 255 | {
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| 256 | return false;
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| 257 | }
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| 258 |
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| 259 | void QGLPixelBuffer::releaseFromDynamicTexture()
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| 260 | {
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| 261 | }
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| 262 |
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| 263 | bool QGLPixelBuffer::hasOpenGLPbuffers()
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| 264 | {
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| 265 | bool ret = qt_resolve_pbuffer_extensions();
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| 266 |
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| 267 | if (!ret)
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| 268 | return false;
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| 269 |
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| 270 | int attribs[40];
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| 271 | int num_configs = 0;
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| 272 |
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| 273 | qt_format_to_attrib_list(QGLFormat::defaultFormat(), attribs);
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| 274 |
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| 275 | GLXFBConfig *configs = glXChooseFBConfig(X11->display, X11->defaultScreen, attribs, &num_configs);
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| 276 | GLXPbuffer pbuf = 0;
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| 277 | GLXContext ctx = 0;
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| 278 |
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| 279 | if (configs && num_configs) {
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| 280 | int pb_attribs[] = {GLX_PBUFFER_WIDTH, 128, GLX_PBUFFER_HEIGHT, 128, XNone};
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| 281 | pbuf = glXCreatePbuffer(X11->display, configs[0], pb_attribs);
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| 282 | ctx = glXCreateNewContext(X11->display, configs[0], GLX_RGBA_TYPE, 0, true);
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| 283 | XFree(configs);
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| 284 | glXDestroyContext(X11->display, ctx);
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| 285 | glXDestroyPbuffer(X11->display, pbuf);
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| 286 | }
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| 287 | return pbuf && ctx;
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| 288 | }
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| 289 |
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| 290 | QT_END_NAMESPACE
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