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gl/framebuffer: expand documentation on valid usage

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Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/809>
This commit is contained in:
Matthew Waters 2020-09-08 15:09:18 +10:00
parent 725763f8b2
commit 3c3d978578
1 changed files with 28 additions and 2 deletions
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30
gst-libs/gst/gl/gstglframebuffer.c
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@ -171,6 +171,9 @@ gst_gl_framebuffer_finalize (GObject * object)
* gst_gl_framebuffer_new:
* @context: a #GstGLContext
*
* This function will internally create an OpenGL framebuffer object and must
* be called on @context's OpenGL thread.
*
* Returns: (transfer full): a new #GstGLFramebuffer
*
* Since: 1.10
@ -205,6 +208,9 @@ gst_gl_framebuffer_new (GstGLContext * context)
* @width: width for the depth buffer
* @height: for the depth buffer
*
* This function will internally create an OpenGL framebuffer object and must
* be called on @context's OpenGL thread.
*
* Returns: a new #GstGLFramebuffer with a depth buffer of @width and @height
*
* Since: 1.10
@ -262,6 +268,13 @@ gst_gl_framebuffer_new_with_default_depth (GstGLContext * context, guint width,
* Perform the steps necessary to have the output of a glDraw* command in
* @func update the contents of @mem.
*
* Note: this function does not map @mem for writing with OpenGL and that must
* be done manually by the caller using any of the mapping functions such as
* gst_memory_map() with the map flags %GST_MAP_WRITE | %GST_MAP_GL.
*
* Must be called with the same OpenGL context current that @fb was created
* with.
*
* Returns: the result of executing @func
*
* Since: 1.10
@ -275,6 +288,7 @@ gst_gl_framebuffer_draw_to_texture (GstGLFramebuffer * fb, GstGLMemory * mem,
g_return_val_if_fail (GST_IS_GL_FRAMEBUFFER (fb), FALSE);
g_return_val_if_fail (gst_is_gl_memory (GST_MEMORY_CAST (mem)), FALSE);
g_return_val_if_fail (gst_gl_context_get_current () == fb->context, FALSE);
gl = fb->context->gl_vtable;
@ -306,6 +320,9 @@ gst_gl_framebuffer_draw_to_texture (GstGLFramebuffer * fb, GstGLMemory * mem,
*
* Bind @fb into the current thread
*
* Must be called with the same OpenGL context current that @fb was created
* with.
*
* Since: 1.10
*/
void
@ -443,6 +460,9 @@ _attach_renderbuffer (GstGLFramebuffer * fb, guint attachment_point,
*
* attach @mem to @attachment_point
*
* Must be called with the same OpenGL context current that @fb was created
* with.
*
* Since: 1.10
*/
void
@ -508,6 +528,8 @@ gst_gl_framebuffer_get_effective_dimensions (GstGLFramebuffer * fb,
* @fbo_target: the GL value of the framebuffer target, GL_FRAMEBUFFER,
* GL_READ_FRAMEBUFFER, GL_DRAW_FRAMEBUFFER
*
* Must be called with @context current.
*
* Returns: whether whether the current framebuffer is complete
*
* Since: 1.10
@ -516,7 +538,10 @@ gboolean
gst_gl_context_check_framebuffer_status (GstGLContext * context,
guint fbo_target)
{
GLenum ret;
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), FALSE);
g_return_val_if_fail (gst_gl_context_get_current () == context, FALSE);
if (fbo_target != GL_FRAMEBUFFER && fbo_target != GL_READ_FRAMEBUFFER
&& fbo_target != GL_DRAW_FRAMEBUFFER) {
@ -528,7 +553,8 @@ gst_gl_context_check_framebuffer_status (GstGLContext * context,
if (!_gst_gl_context_debug_is_enabled (context))
return TRUE;
switch (context->gl_vtable->CheckFramebufferStatus (fbo_target)) {
ret = context->gl_vtable->CheckFramebufferStatus (fbo_target);
switch (ret) {
case GL_FRAMEBUFFER_COMPLETE:
return TRUE;
break;
@ -551,7 +577,7 @@ gst_gl_context_check_framebuffer_status (GstGLContext * context,
break;
#endif
default:
GST_WARNING_OBJECT (context, "Unknown FBO error");
GST_WARNING_OBJECT (context, "Unknown FBO error: %d (0x%x)", ret, ret);
break;
}