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| |
| #include <QtGui/QOffscreenSurface> |
| #include "qeglpbuffer_p.h" |
| #include "qeglconvenience_p.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| /*! |
| \class QEGLPbuffer |
| \brief A pbuffer-based implementation of QPlatformOffscreenSurface for EGL. |
| \since 5.2 |
| \internal |
| \ingroup qpa |
| |
| To use this implementation in the platform plugin simply |
| reimplement QPlatformIntegration::createPlatformOffscreenSurface() |
| and return a new instance of this class. |
| */ |
| |
| QEGLPbuffer::QEGLPbuffer(EGLDisplay display, const QSurfaceFormat &format, QOffscreenSurface *offscreenSurface, |
| QEGLPlatformContext::Flags flags) |
| : QPlatformOffscreenSurface(offscreenSurface) |
| , m_format(format) |
| , m_display(display) |
| , m_pbuffer(EGL_NO_SURFACE) |
| { |
| m_hasSurfaceless = !flags.testFlag(QEGLPlatformContext::NoSurfaceless) |
| && q_hasEglExtension(display, "EGL_KHR_surfaceless_context"); |
| |
| // Disable surfaceless contexts on Mesa for now. As of 10.6.0 and Intel at least, some |
| // operations (glReadPixels) are unable to work without a surface since they at some |
| // point temporarily unbind the current FBO and then later blow up in some seemingly |
| // safe operations, like setting the viewport, that apparently need access to the |
| // read/draw surface in the Intel backend. |
| const char *vendor = eglQueryString(display, EGL_VENDOR); // hard to check for GL_ strings here, so blacklist all Mesa |
| if (vendor && strstr(vendor, "Mesa")) |
| m_hasSurfaceless = false; |
| |
| if (m_hasSurfaceless) |
| return; |
| |
| EGLConfig config = q_configFromGLFormat(m_display, m_format, false, EGL_PBUFFER_BIT); |
| |
| if (config) { |
| const EGLint attributes[] = { |
| EGL_WIDTH, offscreenSurface->size().width(), |
| EGL_HEIGHT, offscreenSurface->size().height(), |
| EGL_LARGEST_PBUFFER, EGL_FALSE, |
| EGL_NONE |
| }; |
| |
| m_pbuffer = eglCreatePbufferSurface(m_display, config, attributes); |
| |
| if (m_pbuffer != EGL_NO_SURFACE) |
| m_format = q_glFormatFromConfig(m_display, config); |
| } |
| } |
| |
| QEGLPbuffer::~QEGLPbuffer() |
| { |
| if (m_pbuffer != EGL_NO_SURFACE) |
| eglDestroySurface(m_display, m_pbuffer); |
| } |
| |
| bool QEGLPbuffer::isValid() const |
| { |
| return m_pbuffer != EGL_NO_SURFACE || m_hasSurfaceless; |
| } |
| |
| QT_END_NAMESPACE |