source: trunk/src/opengl/qglpixelbuffer_egl.cpp@ 691

Last change on this file since 691 was 651, checked in by Dmitry A. Kuminov, 15 years ago

trunk: Merged in qt 4.6.2 sources.

File size: 7.9 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
4** All rights reserved.
5** Contact: Nokia Corporation ([email protected])
6**
7** This file is part of the QtOpenGL module of the Qt Toolkit.
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18** General Public License version 2.1 as published by the Free Software
19** Foundation and appearing in the file LICENSE.LGPL included in the
20** packaging of this file. Please review the following information to
21** ensure the GNU Lesser General Public License version 2.1 requirements
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25** rights. These rights are described in the Nokia Qt LGPL Exception
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28** GNU General Public License Usage
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31** Foundation and appearing in the file LICENSE.GPL included in the
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33** ensure the GNU General Public License version 3.0 requirements will be
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40****************************************************************************/
41
42#include <qdebug.h>
43#include "qglpixelbuffer.h"
44#include "qglpixelbuffer_p.h"
45#include "qgl_egl_p.h"
46
47#include <qimage.h>
48#include <private/qgl_p.h>
49
50#ifdef QT_OPENGL_ES_1_CL
51#include "qgl_cl_p.h"
52#endif
53
54QT_BEGIN_NAMESPACE
55
56#ifdef EGL_BIND_TO_TEXTURE_RGBA
57#define QGL_RENDER_TEXTURE 1
58#else
59#define QGL_RENDER_TEXTURE 0
60#endif
61
62bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidget *shareWidget)
63{
64 // Create the EGL context.
65 ctx = new QEglContext();
66 ctx->setApi(QEgl::OpenGL);
67
68 // Open the EGL display.
69 if (!ctx->openDisplay(0)) {
70 delete ctx;
71 ctx = 0;
72 return false;
73 }
74
75 // Find the shared context.
76 QEglContext *shareContext = 0;
77 if (shareWidget && shareWidget->d_func()->glcx)
78 shareContext = shareWidget->d_func()->glcx->d_func()->eglContext;
79
80 // Choose an appropriate configuration. We use the best format
81 // we can find, even if it is greater than the requested format.
82 // We try for a pbuffer that is capable of texture rendering if possible.
83 textureFormat = EGL_NONE;
84 if (shareContext) {
85 // Use the same configuration as the widget we are sharing with.
86 ctx->setConfig(shareContext->config());
87#if QGL_RENDER_TEXTURE
88 EGLint value = EGL_FALSE;
89 if (ctx->configAttrib(EGL_BIND_TO_TEXTURE_RGBA, &value) && value)
90 textureFormat = EGL_TEXTURE_RGBA;
91 else if (ctx->configAttrib(EGL_BIND_TO_TEXTURE_RGB, &value) && value)
92 textureFormat = EGL_TEXTURE_RGB;
93#endif
94 } else {
95 QEglProperties configProps;
96 qt_egl_set_format(configProps, QInternal::Pbuffer, f);
97 configProps.setRenderableType(ctx->api());
98 bool ok = false;
99#if QGL_RENDER_TEXTURE
100 textureFormat = EGL_TEXTURE_RGBA;
101 configProps.setValue(EGL_BIND_TO_TEXTURE_RGBA, EGL_TRUE);
102 ok = ctx->chooseConfig(configProps, QEgl::BestPixelFormat);
103 if (!ok) {
104 // Try again with RGB texture rendering.
105 textureFormat = EGL_TEXTURE_RGB;
106 configProps.removeValue(EGL_BIND_TO_TEXTURE_RGBA);
107 configProps.setValue(EGL_BIND_TO_TEXTURE_RGB, EGL_TRUE);
108 ok = ctx->chooseConfig(configProps, QEgl::BestPixelFormat);
109 if (!ok) {
110 // One last try for a pbuffer with no texture rendering.
111 configProps.removeValue(EGL_BIND_TO_TEXTURE_RGB);
112 textureFormat = EGL_NONE;
113 }
114 }
115#endif
116 if (!ok) {
117 if (!ctx->chooseConfig(configProps, QEgl::BestPixelFormat)) {
118 delete ctx;
119 ctx = 0;
120 return false;
121 }