Absolute File Name: | /home/qt/qt5_coco/qt5/qtbase/src/platformsupport/eglconvenience/qeglpbuffer.cpp |
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1 | /**************************************************************************** | - | ||||||||||||
2 | ** | - | ||||||||||||
3 | ** Copyright (C) 2016 The Qt Company Ltd. | - | ||||||||||||
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17 | ** GNU Lesser General Public License Usage | - | ||||||||||||
18 | ** Alternatively, this file may be used under the terms of the GNU Lesser | - | ||||||||||||
19 | ** General Public License version 3 as published by the Free Software | - | ||||||||||||
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25 | ** GNU General Public License Usage | - | ||||||||||||
26 | ** Alternatively, this file may be used under the terms of the GNU | - | ||||||||||||
27 | ** General Public License version 2.0 or (at your option) the GNU General | - | ||||||||||||
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34 | ** https://www.gnu.org/licenses/gpl-3.0.html. | - | ||||||||||||
35 | ** | - | ||||||||||||
36 | ** $QT_END_LICENSE$ | - | ||||||||||||
37 | ** | - | ||||||||||||
38 | ****************************************************************************/ | - | ||||||||||||
39 | - | |||||||||||||
40 | #include <QtGui/QOffscreenSurface> | - | ||||||||||||
41 | #include "qeglpbuffer_p.h" | - | ||||||||||||
42 | #include "qeglconvenience_p.h" | - | ||||||||||||
43 | - | |||||||||||||
44 | QT_BEGIN_NAMESPACE | - | ||||||||||||
45 | - | |||||||||||||
46 | /*! | - | ||||||||||||
47 | \class QEGLPbuffer | - | ||||||||||||
48 | \brief A pbuffer-based implementation of QPlatformOffscreenSurface for EGL. | - | ||||||||||||
49 | \since 5.2 | - | ||||||||||||
50 | \internal | - | ||||||||||||
51 | \ingroup qpa | - | ||||||||||||
52 | - | |||||||||||||
53 | To use this implementation in the platform plugin simply | - | ||||||||||||
54 | reimplement QPlatformIntegration::createPlatformOffscreenSurface() | - | ||||||||||||
55 | and return a new instance of this class. | - | ||||||||||||
56 | */ | - | ||||||||||||
57 | - | |||||||||||||
58 | QEGLPbuffer::QEGLPbuffer(EGLDisplay display, const QSurfaceFormat &format, QOffscreenSurface *offscreenSurface, | - | ||||||||||||
59 | QEGLPlatformContext::Flags flags) | - | ||||||||||||
60 | : QPlatformOffscreenSurface(offscreenSurface) | - | ||||||||||||
61 | , m_format(format) | - | ||||||||||||
62 | , m_display(display) | - | ||||||||||||
63 | , m_pbuffer(EGL_NO_SURFACE) | - | ||||||||||||
64 | { | - | ||||||||||||
65 | bool hasSurfaceless = !flags.testFlag(QEGLPlatformContext::NoSurfaceless)
| 0 | ||||||||||||
66 | && q_hasEglExtension(display, "EGL_KHR_surfaceless_context");
| 0 | ||||||||||||
67 | - | |||||||||||||
68 | // Disable surfaceless contexts on Mesa for now. As of 10.6.0 and Intel at least, some | - | ||||||||||||
69 | // operations (glReadPixels) are unable to work without a surface since they at some | - | ||||||||||||
70 | // point temporarily unbind the current FBO and then later blow up in some seemingly | - | ||||||||||||
71 | // safe operations, like setting the viewport, that apparently need access to the | - | ||||||||||||
72 | // read/draw surface in the Intel backend. | - | ||||||||||||
73 | const char *vendor = eglQueryString(display, EGL_VENDOR); // hard to check for GL_ strings here, so blacklist all Mesa | - | ||||||||||||
74 | if (vendor && strstr(vendor, "Mesa"))
| 0 | ||||||||||||
75 | hasSurfaceless = false; never executed: hasSurfaceless = false; | 0 | ||||||||||||
76 | - | |||||||||||||
77 | if (hasSurfaceless)
| 0 | ||||||||||||
78 | return; never executed: return; | 0 | ||||||||||||
79 | - | |||||||||||||
80 | EGLConfig config = q_configFromGLFormat(m_display, m_format, false, EGL_PBUFFER_BIT); | - | ||||||||||||
81 | - | |||||||||||||
82 | if (config) {
| 0 | ||||||||||||
83 | const EGLint attributes[] = { | - | ||||||||||||
84 | EGL_WIDTH, offscreenSurface->size().width(), | - | ||||||||||||
85 | EGL_HEIGHT, offscreenSurface->size().height(), | - | ||||||||||||
86 | EGL_LARGEST_PBUFFER, EGL_FALSE, | - | ||||||||||||
87 | EGL_NONE | - | ||||||||||||
88 | }; | - | ||||||||||||
89 | - | |||||||||||||
90 | m_pbuffer = eglCreatePbufferSurface(m_display, config, attributes); | - | ||||||||||||
91 | - | |||||||||||||
92 | if (m_pbuffer != EGL_NO_SURFACE)
| 0 | ||||||||||||
93 | m_format = q_glFormatFromConfig(m_display, config); never executed: m_format = q_glFormatFromConfig(m_display, config); | 0 | ||||||||||||
94 | } never executed: end of block | 0 | ||||||||||||
95 | } never executed: end of block | 0 | ||||||||||||
96 | - | |||||||||||||
97 | QEGLPbuffer::~QEGLPbuffer() | - | ||||||||||||
98 | { | - | ||||||||||||
99 | if (m_pbuffer != EGL_NO_SURFACE)
| 0 | ||||||||||||
100 | eglDestroySurface(m_display, m_pbuffer); never executed: eglDestroySurface(m_display, m_pbuffer); | 0 | ||||||||||||
101 | } never executed: end of block | 0 | ||||||||||||
102 | - | |||||||||||||
103 | QT_END_NAMESPACE | - | ||||||||||||
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