QDri2Context::QDri2Context(QXcbWindow *window)
: d_ptr(new QDri2ContextPrivate(window))
{
Q_D(QDri2Context);
static const EGLint contextAttribs[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE
};
eglBindAPI(EGL_OPENGL_ES_API);
EGLContext shareContext = EGL_NO_CONTEXT;
if (window->widget()->platformWindowFormat().sharedGLContext()) {
QDri2Context *context = static_cast<QDri2Context *>(window->widget()->platformWindowFormat().sharedGLContext());
shareContext = context->d_func()->eglContext;
}
d->eglContext = eglCreateContext(EGL_DISPLAY_FROM_XCB(d->qXcbWindow), NULL,
shareContext, contextAttribs);
if (d->eglContext == EGL_NO_CONTEXT) {
qDebug() << "No eglContext!" << eglGetError();
}
EGLBoolean makeCurrentSuccess = eglMakeCurrent(EGL_DISPLAY_FROM_XCB(d->qXcbWindow),EGL_NO_SURFACE,EGL_NO_SURFACE,d->eglContext);
if (!makeCurrentSuccess) {
qDebug() << "eglMakeCurrent failed!" << eglGetError();
}
xcb_dri2_create_drawable (d->xcbConnection(), d->xcbWindow());
glGenFramebuffers(1,&d->fbo);
glBindFramebuffer(GL_FRAMEBUFFER,d->fbo);
glActiveTexture(GL_TEXTURE0);
glGenRenderbuffers(1, &d->rbo);
glBindRenderbuffer(GL_RENDERBUFFER, d->rbo);
glGenRenderbuffers(1,&d->depth);
glBindRenderbuffer(GL_RENDERBUFFER, d->depth);
resize(d->qXcbWindow->widget()->geometry().size());
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, d->rbo);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERER,d->depth);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERER,d->depth);
//restore the old current context
const QPlatformGLContext *currentContext = QPlatformGLContext::currentContext();
if (currentContext)
const_cast<QPlatformGLContext*>(currentContext)->makeCurrent();
}
void QDri2Context::makeCurrent()
{
Q_D(QDri2Context);
eglMakeCurrent(EGL_DISPLAY_FROM_XCB(d->qXcbWindow),EGL_NO_SURFACE,EGL_NO_SURFACE,d->eglContext);
glBindFramebuffer(GL_FRAMEBUFFER,d->fbo);
}
void QDri2Context::resize(const QSize &size)
{
Q_D(QDri2Context);
d->size= size;
glBindFramebuffer(GL_FRAMEBUFFER,d->fbo);
xcb_dri2_dri2_buffer_t *backBfr = backBuffer();
if (d->image) {
qDebug() << "destroing image";
eglDestroyImageKHR(EGL_DISPLAY_FROM_XCB(d->qXcbWindow),d->image);
}
EGLint imgAttribs[] = {
EGL_WIDTH, d->size.width(),
EGL_HEIGHT, d->size.height(),
EGL_DRM_BUFFER_STRIDE_MESA, backBfr->pitch /4,
EGL_DRM_BUFFER_FORMAT_MESA, EGL_DRM_BUFFER_FORMAT_ARGB32_MESA,
EGL_NONE
};
d->image = eglCreateImageKHR(EGL_DISPLAY_FROM_XCB(d->qXcbWindow),
EGL_NO_CONTEXT,
EGL_DRM_BUFFER_MESA,
(EGLClientBuffer) backBfr->name,
imgAttribs);
glBindRenderbuffer(GL_RENDERBUFFER, d->rbo);
glEGLImageTargetRenderbufferStorageOES(GL_RENDERBUFFER,
d->image);
glBindRenderbuffer(GL_RENDERBUFFER, d->depth);
glRenderbufferStorage(GL_RENDERBUFFER,GL_DEPTH24_STENCIL8_OES,d->size.width(), d->size.height());
}
void QDri2Context::doneCurrent()
{
QPlatformGLContext::doneCurrent();
Q_D(QDri2Context);
eglMakeCurrent(EGL_DISPLAY_FROM_XCB(d->qXcbWindow),EGL_NO_SURFACE,EGL_NO_SURFACE,EGL_NO_CONTEXT);
}
