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glfilter: retrieve the shader attributes from the GL thread

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Otherwise we will receive bogus values

https://bugzilla.gnome.org/show_bug.cgi?id=763365
This commit is contained in:
Matthew Waters 2016-03-10 00:27:53 +11:00 committed by Tim-Philipp Müller
parent 34e12a8837
commit 4406730633
2 changed files with 26 additions and 18 deletions
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43
gst-libs/gst/gl/gstglfilter.c
View file

@ -1031,6 +1031,28 @@ gst_gl_filter_render_to_target (GstGLFilter * filter, gboolean resize,
filter->fbo, filter->depthbuffer, target, _glcb2, &cb);
}
static void
_get_attributes (GstGLFilter * filter)
{
if (!filter->default_shader)
return;
if (filter->valid_attributes)
return;
if (filter->draw_attr_position_loc == -1)
filter->draw_attr_position_loc =
gst_gl_shader_get_attribute_location (filter->default_shader,
"a_position");
if (filter->draw_attr_texture_loc == -1)
filter->draw_attr_texture_loc =
gst_gl_shader_get_attribute_location (filter->default_shader,
"a_texcoord");
filter->valid_attributes = TRUE;
}
static void
_draw_with_shader_cb (gint width, gint height, guint texture, gpointer stuff)
{
@ -1045,6 +1067,7 @@ _draw_with_shader_cb (gint width, gint height, guint texture, gpointer stuff)
}
#endif
_get_attributes (filter);
gst_gl_shader_use (filter->default_shader);
gl->ActiveTexture (GL_TEXTURE1);
@ -1057,23 +1080,6 @@ _draw_with_shader_cb (gint width, gint height, guint texture, gpointer stuff)
gst_gl_filter_draw_texture (filter, texture, width, height);
}
static void
_get_attributes (GstGLFilter * filter)
{
if (!filter->default_shader)
return;
if (filter->draw_attr_position_loc == -1)
filter->draw_attr_position_loc =
gst_gl_shader_get_attribute_location (filter->default_shader,
"a_position");
if (filter->draw_attr_texture_loc == -1)
filter->draw_attr_texture_loc =
gst_gl_shader_get_attribute_location (filter->default_shader,
"a_texcoord");
}
/**
* gst_gl_filter_render_to_target_with_shader:
* @filter: a #GstGLFilter
@ -1094,8 +1100,9 @@ void
gst_gl_filter_render_to_target_with_shader (GstGLFilter * filter,
gboolean resize, GLuint input, GLuint target, GstGLShader * shader)
{
if (filter->default_shader != shader)
filter->valid_attributes = FALSE;
filter->default_shader = shader;
_get_attributes (filter);
gst_gl_filter_render_to_target (filter, resize, input, target,
_draw_with_shader_cb, filter);

1
gst-libs/gst/gl/gstglfilter.h
View file

@ -71,6 +71,7 @@ struct _GstGLFilter
GLuint out_tex_id;
GstGLShader *default_shader;
gboolean valid_attributes;
GLuint vao;
GLuint vbo_indices;