I'm setting up a EGL PBuffer for shared rendering between Qt Quick and
Direct3D, and I'm getting closer to a usable result. However, I am having
trouble getting a multisample frame config for my PBuffer.
I've tried both getting the EGL Config through the platform native
interface and using eglChooseConfig. I have multisampling enabled in my
QSurfaceFormat and in my EGL attributes, but I don't get any multisampling.
This:
QPlatformNativeInterface *nativeInterface =
QGuiApplication::platformNativeInterface();
EGLConfig egl_config =
static_cast<EGLConfig>(nativeInterface->nativeResourceForContext("eglConfig",
gl_context_));
Or this:
const EGLint attribList[] =
{
EGL_RED_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_ALPHA_SIZE, 8,
EGL_DEPTH_SIZE, 16,
EGL_SAMPLE_BUFFERS, 1,
EGL_SAMPLES, 4,
EGL_NONE
};
EGLint iConfigs;
EGLConfig egl_config;
eglChooseConfig(egl_display_, attribList,
&egl_config, 1, &iConfigs);
The last version returns 0 configs.
Should it be possible to generate a multisample PBuffer this way? Are there
any alternative solutions, such as for instance rendering to an FBO and
then blitting to the PBuffer somehow?
- Thomas
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