/**
* gst_gl_context_fill_info:
* @context: a #GstGLContext:
*
* Fills @context's info (version, extensions, vtable, etc) from the GL
* context in the current thread. Typically used with wrapped contexts to
* allow wrapped contexts to be used as regular #GstGLContext's.
*
* Since: 1.6
*/
gboolean
gst_gl_context_fill_info (GstGLContext * context, GError ** error)
{
GstGLFuncs *gl;
GString *ext_g_str = NULL;
const gchar *ext_const_c_str = NULL;
GstGLAPI gl_api;
gboolean ret;
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), FALSE);
g_return_val_if_fail (context->priv->active_thread == g_thread_self (),
FALSE);
gl = context->gl_vtable;
gl_api = gst_gl_context_get_gl_api (context);
gl->GetError = gst_gl_context_get_proc_address (context, "glGetError");
gl->GetString = gst_gl_context_get_proc_address (context, "glGetString");
gl->GetStringi = gst_gl_context_get_proc_address (context, "glGetStringi");
gl->GetIntegerv = gst_gl_context_get_proc_address (context, "glGetIntegerv");
if (!gl->GetError || !gl->GetString) {
g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_FAILED,
"could not GetProcAddress core opengl functions");
goto failure;
}
/* gl api specific code */
ret = _create_context_info (context, gl_api, &context->priv->gl_major,
&context->priv->gl_minor, error);
if (!ret) {
g_assert (error == NULL || *error != NULL);
goto failure;
}
/* GL core contexts and GLES3 */
if (gl->GetIntegerv && gl->GetStringi && context->priv->gl_major >= 3)
ext_g_str = _build_extension_string (context);
if (ext_g_str && ext_g_str->len) {
GST_DEBUG_OBJECT (context, "GL_EXTENSIONS: %s", ext_g_str->str);
_gst_gl_feature_check_ext_functions (context, context->priv->gl_major,
context->priv->gl_minor, ext_g_str->str);
context->priv->gl_exts = g_string_free (ext_g_str, FALSE);
} else {
ext_const_c_str = (const gchar *) gl->GetString (GL_EXTENSIONS);
if (!ext_const_c_str)
ext_const_c_str = "";
GST_DEBUG_OBJECT (context, "GL_EXTENSIONS: %s", ext_const_c_str);
_gst_gl_feature_check_ext_functions (context, context->priv->gl_major,
context->priv->gl_minor, ext_const_c_str);
context->priv->gl_exts = g_strdup (ext_const_c_str);
}
if (gl_api & GST_GL_API_OPENGL3
&& !gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL3, 4, 1)
&& !gst_gl_check_extension ("GL_ARB_ES2_compatibility",
context->priv->gl_exts)) {
g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_FAILED,
"An opengl3 context created but the required ES2 compatibility was not found");
goto failure;
}
/* Does not implement OES_vertex_array_object properly, see
* https://bugzilla.gnome.org/show_bug.cgi?id=750185 */
if (g_strcmp0 ((const gchar *) gl->GetString (GL_VENDOR),
"Imagination Technologies") == 0
&& g_strcmp0 ((const gchar *) gl->GetString (GL_RENDERER),
"PowerVR SGX 544MP") == 0) {
gl->GenVertexArrays = NULL;
gl->DeleteVertexArrays = NULL;
gl->BindVertexArray = NULL;
gl->IsVertexArray = NULL;
}
return TRUE;
failure:
return FALSE;
}
//gboolean
//gst_gl_context_create (GstGLContext * context, GstGLContext * other_context, GError ** error)
static gpointer
gst_gl_context_create_thread (GstGLContext * context)
{
GstGLContextClass *context_class;
GstGLWindowClass *window_class;
GstGLFuncs *gl;
gboolean ret = FALSE;
GstGLAPI compiled_api, user_api, gl_api;
gchar *api_string;
gchar *compiled_api_s;
gchar *user_api_string;
const gchar *user_choice;
GError **error;
GstGLContext *other_context;
GString *ext_g_str = NULL;
const gchar *ext_const_c_str = NULL;
g_mutex_lock (&context->priv->render_lock);
error = context->priv->error;
other_context = context->priv->other_context;
context_class = GST_GL_CONTEXT_GET_CLASS (context);
window_class = GST_GL_WINDOW_GET_CLASS (context->window);
if (window_class->open) {
if (!window_class->open (context->window, error)) {
g_assert (error == NULL || *error != NULL);
goto failure;
}
}
gl = context->gl_vtable;
compiled_api = _compiled_api ();
user_choice = g_getenv ("GST_GL_API");
user_api = gst_gl_api_from_string (user_choice);
user_api_string = gst_gl_api_to_string (user_api);
compiled_api_s = gst_gl_api_to_string (compiled_api);
if ((user_api & compiled_api) == GST_GL_API_NONE) {
g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_WRONG_API,
"Cannot create context with the user requested api (%s). "
"We have support for (%s)", user_api_string, compiled_api_s);
g_free (user_api_string);
g_free (compiled_api_s);
goto failure;
}
if (context_class->choose_format &&
!context_class->choose_format (context, error)) {
g_assert (error == NULL || *error != NULL);
g_free (compiled_api_s);
g_free (user_api_string);
goto failure;
}
GST_INFO ("Attempting to create opengl context. user chosen api(s) (%s), "
"compiled api support (%s)", user_api_string, compiled_api_s);
if (!context_class->create_context (context, compiled_api & user_api,
other_context, error)) {
g_assert (error == NULL || *error != NULL);
g_free (compiled_api_s);
g_free (user_api_string);
goto failure;
}
GST_INFO ("created context");
if (!context_class->activate (context, TRUE)) {
g_set_error (error, GST_GL_CONTEXT_ERROR,
GST_GL_CONTEXT_ERROR_RESOURCE_UNAVAILABLE,
"Failed to activate the GL Context");
g_free (compiled_api_s);
g_free (user_api_string);
goto failure;
}
gl_api = gst_gl_context_get_gl_api (context);
g_assert (gl_api != GST_GL_API_NONE && gl_api != GST_GL_API_ANY);
api_string = gst_gl_api_to_string (gl_api);
GST_INFO ("available GL APIs: %s", api_string);
if (((compiled_api & gl_api) & user_api) == GST_GL_API_NONE) {
g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_WRONG_API,
"failed to create context, context "
"could not provide correct api. user (%s), compiled (%s), context (%s)",
user_api_string, compiled_api_s, api_string);
g_free (api_string);
g_free (compiled_api_s);
g_free (user_api_string);
goto failure;
}
g_free (api_string);
g_free (compiled_api_s);
g_free (user_api_string);
gl->GetError = gst_gl_context_get_proc_address (context, "glGetError");
gl->GetString = gst_gl_context_get_proc_address (context, "glGetString");
gl->GetStringi = gst_gl_context_get_proc_address (context, "glGetStringi");
gl->GetIntegerv = gst_gl_context_get_proc_address (context, "glGetIntegerv");
if (!gl->GetError || !gl->GetString) {
g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_FAILED,
"could not GetProcAddress core opengl functions");
goto failure;
}
/* gl api specific code */
ret = _create_context_info (context, gl_api, &context->priv->gl_major,
&context->priv->gl_minor, error);
if (!ret) {
g_assert (error == NULL || *error != NULL);
goto failure;
}
/* GL core contexts and GLES3 */
if (gl->GetIntegerv && gl->GetStringi && context->priv->gl_major >= 3)
ext_g_str = _build_extension_string (context);
if (ext_g_str && ext_g_str->len) {
GST_DEBUG_OBJECT (context, "GL_EXTENSIONS: %s", ext_g_str->str);
_gst_gl_feature_check_ext_functions (context, context->priv->gl_major,
context->priv->gl_minor, ext_g_str->str);
context->priv->gl_exts = g_string_free (ext_g_str, FALSE);
} else {
ext_const_c_str = (const gchar *) gl->GetString (GL_EXTENSIONS);
if (!ext_const_c_str)
ext_const_c_str = "";
GST_DEBUG_OBJECT (context, "GL_EXTENSIONS: %s", ext_const_c_str);
_gst_gl_feature_check_ext_functions (context, context->priv->gl_major,
context->priv->gl_minor, ext_const_c_str);
context->priv->gl_exts = g_strdup (ext_const_c_str);
}
context->priv->alive = TRUE;
g_cond_signal (&context->priv->create_cond);
// g_mutex_unlock (&context->priv->render_lock);
gst_gl_window_send_message_async (context->window,
(GstGLWindowCB) _unlock_create_thread, context, NULL);
gst_gl_window_run (context->window);
GST_INFO ("loop exited\n");
g_mutex_lock (&context->priv->render_lock);
context->priv->alive = FALSE;
context_class->activate (context, FALSE);
context_class->destroy_context (context);
/* User supplied callback */
if (context->window->close)
context->window->close (context->window->close_data);
/* window specific shutdown */
if (window_class->close) {
window_class->close (context->window);
}
g_cond_signal (&context->priv->destroy_cond);
g_mutex_unlock (&context->priv->render_lock);
return NULL;
failure:
{
g_cond_signal (&context->priv->create_cond);
g_mutex_unlock (&context->priv->render_lock);
return NULL;
}
}
/**
* gst_gl_context_fill_info:
* @context: a #GstGLContext:
*
* Fills @context's info (version, extensions, vtable, etc) from the GL
* context in the current thread. Typically used with wrapped contexts to
* allow wrapped contexts to be used as regular #GstGLContext's.
*
* Since: 1.6
*/
gboolean
gst_gl_context_fill_info (GstGLContext * context, GError ** error)
{
GstGLFuncs *gl;
GString *ext_g_str = NULL;
const gchar *ext_const_c_str = NULL;
GstGLAPI gl_api;
gboolean ret;
g_return_val_if_fail (GST_GL_IS_CONTEXT (context), FALSE);
g_return_val_if_fail (context->priv->active_thread == g_thread_self (),
FALSE);
gl = context->gl_vtable;
gl_api = gst_gl_context_get_gl_api (context);
gl->GetError = gst_gl_context_get_proc_address (context, "glGetError");
gl->GetString = gst_gl_context_get_proc_address (context, "glGetString");
gl->GetStringi = gst_gl_context_get_proc_address (context, "glGetStringi");
gl->GetIntegerv = gst_gl_context_get_proc_address (context, "glGetIntegerv");
if (!gl->GetError || !gl->GetString) {
g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_FAILED,
"could not GetProcAddress core opengl functions");
goto failure;
}
/* gl api specific code */
ret = _create_context_info (context, gl_api, &context->priv->gl_major,
&context->priv->gl_minor, error);
if (!ret) {
g_assert (error == NULL || *error != NULL);
goto failure;
}
/* GL core contexts and GLES3 */
if (gl->GetIntegerv && gl->GetStringi && context->priv->gl_major >= 3)
ext_g_str = _build_extension_string (context);
if (ext_g_str && ext_g_str->len) {
GST_DEBUG_OBJECT (context, "GL_EXTENSIONS: %s", ext_g_str->str);
_gst_gl_feature_check_ext_functions (context, context->priv->gl_major,
context->priv->gl_minor, ext_g_str->str);
context->priv->gl_exts = g_string_free (ext_g_str, FALSE);
} else {
ext_const_c_str = (const gchar *) gl->GetString (GL_EXTENSIONS);
if (!ext_const_c_str)
ext_const_c_str = "";
GST_DEBUG_OBJECT (context, "GL_EXTENSIONS: %s", ext_const_c_str);
_gst_gl_feature_check_ext_functions (context, context->priv->gl_major,
context->priv->gl_minor, ext_const_c_str);
context->priv->gl_exts = g_strdup (ext_const_c_str);
}
if (gl_api & GST_GL_API_OPENGL3
&& !gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL3, 4, 1)
&& !gst_gl_check_extension ("GL_ARB_ES2_compatibility",
context->priv->gl_exts)) {
g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_FAILED,
"An opengl3 context created but the required ES2 compatibility was not found");
goto failure;
}
return TRUE;
failure:
return FALSE;
}
