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gl/calayer: provide a current wrapped GstGLContext for callbacks

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So that the draw and resize callbacks can get the current GstGLContext.
This commit is contained in:
Matthew Waters 2015-05-19 16:19:41 +10:00
parent 81e46e8b75
commit 2e58daf196
2 changed files with 35 additions and 0 deletions
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1
gst-libs/gst/gl/cocoa/gstglcaopengllayer.h
View file

@ -35,6 +35,7 @@ G_BEGIN_DECLS
CGLContextObj gl_context;
@private
GstGLContext *draw_context;
CGRect last_bounds;
gint expected_dims[4];

34
gst-libs/gst/gl/cocoa/gstglcaopengllayer.m
View file

@ -32,6 +32,9 @@
if (self->draw_notify)
self->draw_notify (self->draw_data);
if (self->draw_context)
gst_object_unref (self->draw_context);
GST_TRACE ("dealloc GstGLCAOpenGLLayer %p context %p", self, self->gst_gl_context);
[super dealloc];
@ -86,8 +89,10 @@ _context_ready (gpointer data)
}
- (CGLContextObj)copyCGLContextForPixelFormat:(CGLPixelFormatObj)pixelFormat {
GstGLDisplay *display;
CGLContextObj external_context = NULL;
CGLError ret;
GError *error = NULL;
if (self->gst_gl_context)
external_context = (CGLContextObj) gst_gl_context_get_gl_context (GST_GL_CONTEXT (self->gst_gl_context));
@ -98,8 +103,35 @@ _context_ready (gpointer data)
ret = CGLCreateContext (pixelFormat, external_context, &self->gl_context);
if (ret != kCGLNoError) {
GST_ERROR ("failed to create CGL context in CAOpenGLLayer with share context %p: %s", external_context, CGLErrorString(ret));
return NULL;
}
if (self->draw_context)
gst_object_unref (self->draw_context);
display = gst_gl_context_get_display (GST_GL_CONTEXT (self->gst_gl_context));
self->draw_context = gst_gl_context_new_wrapped (display,
(guintptr) self->gl_context, GST_GL_PLATFORM_CGL,
gst_gl_display_get_gl_api (display));
gst_object_unref (display);
if (!self->draw_context) {
GST_ERROR ("failed to create wrapped context");
return NULL;
}
if (kCGLNoError != CGLSetCurrentContext (self->gl_context)) {
GST_ERROR ("failed set cgl context %p current", self->gl_context);
return NULL;
}
gst_gl_context_activate (self->draw_context, TRUE);
if (!gst_gl_context_fill_info (self->draw_context, &error)) {
GST_ERROR ("failed to fill wrapped context information: %s", error->message);
return NULL;
}
gst_gl_context_activate (self->draw_context, FALSE);
return self->gl_context;
}
@ -151,6 +183,7 @@ _context_ready (gpointer data)
* the CA viewport set up on entry to this function */
gl->GetIntegerv (GL_VIEWPORT, ca_viewport);
gst_gl_context_activate (self->draw_context, TRUE);
if (self->last_bounds.size.width != self.bounds.size.width
|| self->last_bounds.size.height != self.bounds.size.height) {
if (self->resize_cb) {
@ -185,6 +218,7 @@ _context_ready (gpointer data)
if (self->draw_cb)
self->draw_cb (self->draw_data);
gst_gl_context_activate (self->draw_context, FALSE);
/* flushes the buffer */
[super drawInCGLContext:glContext pixelFormat:pixelFormat forLayerTime:interval displayTime:timeStamp];