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qeglpbuffer.cpp

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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 { -

bool hasSurfaceless = !flags.testFlag(QEGLPlatformContext::NoSurfaceless)

!flags.testFla...NoSurfaceless)	Description
TRUE	never evaluated
FALSE	never evaluated

&& q_hasEglExtension(display, "EGL_KHR_surfaceless_context");

q_hasEglExtens...less_context")	Description
TRUE	never evaluated
FALSE	never evaluated

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 -

if (vendor && strstr(vendor, "Mesa"))

vendor	Description
TRUE	never evaluated
FALSE	never evaluated

strstr(vendor, "Mesa")	Description
TRUE	never evaluated
FALSE	never evaluated

hasSurfaceless = false;

never executed: hasSurfaceless = false;

76 -

if (hasSurfaceless)

hasSurfaceless	Description
TRUE	never evaluated
FALSE	never evaluated

return;

never executed: return;

79 -

80 EGLConfig config = q_configFromGLFormat(m_display, m_format, false, EGL_PBUFFER_BIT); -

81 -

if (config) {

config	Description
TRUE	never evaluated
FALSE	never evaluated

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 -

if (m_pbuffer != EGL_NO_SURFACE)

m_pbuffer != ((EGLSurface)0)	Description
TRUE	never evaluated
FALSE	never evaluated

m_format = q_glFormatFromConfig(m_display, config);

never executed: m_format = q_glFormatFromConfig(m_display, config);

}

never executed: end of block

}

never executed: end of block

96 -

97 QEGLPbuffer::~QEGLPbuffer() -

98 { -

if (m_pbuffer != EGL_NO_SURFACE)

m_pbuffer != ((EGLSurface)0)	Description
TRUE	never evaluated
FALSE	never evaluated

100

eglDestroySurface(m_display, m_pbuffer);

never executed: eglDestroySurface(m_display, m_pbuffer);

101

}

never executed: end of block

102 -

103 QT_END_NAMESPACE -

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