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qmlglsrc: use glBlitFramebuffer to copy texture for GLES3.0

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If support glBlitFrameBuffer, use it for texture copy instead
of glCopyTexImage2D

https://bugzilla.gnome.org/show_bug.cgi?id=777078
This commit is contained in:
Haihua Hu 2017-01-10 16:54:48 +08:00 committed by Matthew Waters
parent 1c12c21653
commit afa9c57a52
2 changed files with 50 additions and 1 deletions
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50
ext/qt/qtwindow.cc
View file

@ -67,6 +67,8 @@ struct _QtGLWindowPrivate
GstGLDisplay *display;
GstGLContext *other_context;
GLuint fbo;
/* frames that qmlview rendered in its gl thread */
quint64 frames_rendered;
quint64 start;
@ -121,6 +123,8 @@ QtGLWindow::QtGLWindow ( QWindow * parent, QQuickWindow *src ) :
else
connect (source, SIGNAL(sceneGraphInitialized()), this, SLOT(onSceneGraphInitialized()), Qt::DirectConnection);
connect (source, SIGNAL(sceneGraphInvalidated()), this, SLOT(onSceneGraphInvalidated()), Qt::DirectConnection);
GST_DEBUG ("%p init Qt Window", this->priv->display);
}
@ -224,7 +228,23 @@ QtGLWindow::afterRendering()
this->source->renderTargetId(), dst_tex, width,height);
gl->BindTexture (GL_TEXTURE_2D, dst_tex);
gl->CopyTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA, 0, 0, width, height, 0);
if (gl->BlitFramebuffer) {
gl->BindFramebuffer (GL_DRAW_FRAMEBUFFER, this->priv->fbo);
gl->FramebufferTexture2D (GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, dst_tex, 0);
ret = gst_gl_context_check_framebuffer_status (context);
if (!ret) {
GST_ERROR ("FBO errors");
goto errors;
}
gl->ReadBuffer (GL_COLOR_ATTACHMENT0);
gl->BlitFramebuffer (0, 0, width, height,
0, 0, width, height,
GL_COLOR_BUFFER_BIT, GL_LINEAR);
} else {
gl->CopyTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA, 0, 0, width, height, 0);
}
GST_DEBUG ("rendering finished");
@ -268,10 +288,38 @@ QtGLWindow::onSceneGraphInitialized()
this->priv->initted = gst_qt_get_gl_wrapcontext (this->priv->display,
&this->priv->other_context, NULL);
if (this->priv->initted && this->priv->other_context) {
const GstGLFuncs *gl;
gst_gl_context_activate (this->priv->other_context, TRUE);
gl = this->priv->other_context->gl_vtable;
gl->GenFramebuffers (1, &this->priv->fbo);
gst_gl_context_activate (this->priv->other_context, FALSE);
}
GST_DEBUG ("%p created wrapped GL context %" GST_PTR_FORMAT, this,
this->priv->other_context);
}
void
QtGLWindow::onSceneGraphInvalidated()
{
GST_DEBUG ("scene graph invalidated");
if (this->priv->fbo && this->priv->other_context) {
const GstGLFuncs *gl;
gst_gl_context_activate (this->priv->other_context, TRUE);
gl = this->priv->other_context->gl_vtable;
gl->DeleteFramebuffers (1, &this->priv->fbo);
gst_gl_context_activate (this->priv->other_context, FALSE);
}
}
bool
QtGLWindow::getGeometry(int * width, int * height)
{

1
ext/qt/qtwindow.h
View file

@ -48,6 +48,7 @@ private Q_SLOTS:
void beforeRendering ();
void afterRendering ();
void onSceneGraphInitialized ();
void onSceneGraphInvalidated ();
void aboutToQuit();
private: