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glfilterapp: update for the use of shaders

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Fixes black output when placed in pipelines (using the default drawing).

https://bugzilla.gnome.org/show_bug.cgi?id=763365
This commit is contained in:
Matthew Waters 2016-03-10 00:29:41 +11:00 committed by Tim-Philipp Müller
parent 4406730633
commit c1d49430ec
1 changed files with 36 additions and 24 deletions
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60
ext/gl/gstglfilterapp.c
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@ -57,6 +57,7 @@ static guint gst_gl_filter_app_signals[LAST_SIGNAL] = { 0 };
#define DEBUG_INIT \
GST_DEBUG_CATEGORY_INIT (gst_gl_filter_app_debug, "glfilterapp", 0, "glfilterapp element");
#define gst_gl_filter_app_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstGLFilterApp, gst_gl_filter_app,
GST_TYPE_GL_FILTER, DEBUG_INIT);
@ -69,9 +70,9 @@ static gboolean gst_gl_filter_app_set_caps (GstGLFilter * filter,
GstCaps * incaps, GstCaps * outcaps);
static gboolean gst_gl_filter_app_filter_texture (GstGLFilter * filter,
guint in_tex, guint out_tex);
static void gst_gl_filter_app_callback (gint width, gint height, guint texture,
gpointer stuff);
static gboolean gst_gl_filter_app_gl_start (GstGLBaseFilter * base_filter);
static void gst_gl_filter_app_gl_stop (GstGLBaseFilter * base_filter);
static void
gst_gl_filter_app_class_init (GstGLFilterAppClass * klass)
@ -85,6 +86,9 @@ gst_gl_filter_app_class_init (GstGLFilterAppClass * klass)
gobject_class->set_property = gst_gl_filter_app_set_property;
gobject_class->get_property = gst_gl_filter_app_get_property;
GST_GL_BASE_FILTER_CLASS (klass)->gl_start = gst_gl_filter_app_gl_start;
GST_GL_BASE_FILTER_CLASS (klass)->gl_stop = gst_gl_filter_app_gl_stop;
GST_GL_FILTER_CLASS (klass)->set_caps = gst_gl_filter_app_set_caps;
GST_GL_FILTER_CLASS (klass)->filter_texture =
gst_gl_filter_app_filter_texture;
@ -143,6 +147,34 @@ gst_gl_filter_app_get_property (GObject * object, guint prop_id,
}
}
static gboolean
gst_gl_filter_app_gl_start (GstGLBaseFilter * base_filter)
{
GstGLFilter *filter = GST_GL_FILTER (base_filter);
GError *error = NULL;
if (!(filter->default_shader =
gst_gl_shader_new_default (base_filter->context, &error))) {
GST_ELEMENT_ERROR (filter, RESOURCE, NOT_FOUND, ("%s",
"Failed to create the default shader"), ("%s", error->message));
return FALSE;
}
return GST_GL_BASE_FILTER_CLASS (parent_class)->gl_start (base_filter);
}
static void
gst_gl_filter_app_gl_stop (GstGLBaseFilter * base_filter)
{
GstGLFilter *filter = GST_GL_FILTER (base_filter);
if (filter->default_shader)
gst_object_unref (filter->default_shader);
filter->default_shader = NULL;
GST_GL_BASE_FILTER_CLASS (parent_class)->gl_stop (base_filter);
}
static gboolean
gst_gl_filter_app_set_caps (GstGLFilter * filter, GstCaps * incaps,
GstCaps * outcaps)
@ -202,29 +234,9 @@ gst_gl_filter_app_filter_texture (GstGLFilter * filter, guint in_tex,
filter->fbo, filter->depthbuffer, out_tex, _glcb2, &cb);
if (app_filter->default_draw) {
gst_gl_filter_render_to_target (filter, TRUE, in_tex, out_tex,
gst_gl_filter_app_callback, filter);
gst_gl_filter_render_to_target_with_shader (filter, TRUE, in_tex, out_tex,
filter->default_shader);
}
return TRUE;
}
//opengl scene, params: input texture (not the output filter->texture)
static void
gst_gl_filter_app_callback (gint width, gint height, guint texture,
gpointer stuff)
{
GstGLFilter *filter = GST_GL_FILTER (stuff);
#if GST_GL_HAVE_OPENGL
if (gst_gl_context_get_gl_api (GST_GL_BASE_FILTER (filter)->context) &
GST_GL_API_OPENGL) {
GstGLFuncs *gl = GST_GL_BASE_FILTER (filter)->context->gl_vtable;
gl->MatrixMode (GL_PROJECTION);
gl->LoadIdentity ();
}
#endif
gst_gl_filter_draw_texture (filter, texture, width, height);
}