qeglpbuffer.cpp

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38****************************************************************************/-
39-
40#include <QtGui/QOffscreenSurface>-
41#include "qeglpbuffer_p.h"-
42#include "qeglconvenience_p.h"-
43-
44QT_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-
58QEGLPbuffer::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)
!flags.testFla...NoSurfaceless)Description
TRUEnever evaluated
FALSEnever evaluated
0
66 && q_hasEglExtension(display, "EGL_KHR_surfaceless_context");
q_hasEglExtens...less_context")Description
TRUEnever evaluated
FALSEnever evaluated
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"))
vendorDescription
TRUEnever evaluated
FALSEnever evaluated
strstr(vendor, "Mesa")Description
TRUEnever evaluated
FALSEnever evaluated
0
75 hasSurfaceless = false;
never executed: hasSurfaceless = false;
0
76-
77 if (hasSurfaceless)
hasSurfacelessDescription
TRUEnever evaluated
FALSEnever evaluated
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) {
configDescription
TRUEnever evaluated
FALSEnever evaluated
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)
m_pbuffer != ((EGLSurface)0)Description
TRUEnever evaluated
FALSEnever evaluated
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-
97QEGLPbuffer::~QEGLPbuffer()-
98{-
99 if (m_pbuffer != EGL_NO_SURFACE)
m_pbuffer != ((EGLSurface)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
100 eglDestroySurface(m_display, m_pbuffer);
never executed: eglDestroySurface(m_display, m_pbuffer);
0
101}
never executed: end of block
0
102-
103QT_END_NAMESPACE-
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