diff options
Diffstat (limited to 'src/opengl/qgl_egl.cpp')
| -rw-r--r-- | src/opengl/qgl_egl.cpp | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/src/opengl/qgl_egl.cpp b/src/opengl/qgl_egl.cpp index 0fbbbf9..44e8ae9 100644 --- a/src/opengl/qgl_egl.cpp +++ b/src/opengl/qgl_egl.cpp @@ -185,8 +185,26 @@ void QGLContext::makeCurrent() return; } - if (d->eglContext->makeCurrent(d->eglSurfaceForDevice())) + if (d->eglContext->makeCurrent(d->eglSurfaceForDevice())) { QGLContextPrivate::setCurrentContext(this); + if (!d->workaroundsCached) { + d->workaroundsCached = true; + const char *renderer = reinterpret_cast<const char *>(glGetString(GL_RENDERER)); + if (strstr(renderer, "SGX") || strstr(renderer, "MBX")) { + // PowerVR MBX/SGX chips needs to clear all buffers when starting to render + // a new frame, otherwise there will be a performance penalty to pay for + // each frame. + d->workaround_needsFullClearOnEveryFrame = true; + + // Older PowerVR SGX drivers (like the one in the N900) have a + // bug which prevents glCopyTexSubImage2D() to work with a POT + // or GL_ALPHA texture bound to an FBO. The only way to + // identify that driver is to check the EGL version number for it. + if (strstr(eglQueryString(d->eglContext->display(), EGL_VERSION), "1.3")) + d->workaround_brokenFBOReadBack = true; + } + } + } } void QGLContext::doneCurrent() |