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gl: fallback to glGetString if GL_NUM_EXTENSIONS fails

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Need it on MacOSX 10.7.5
This commit is contained in:
Julien Isorce 2014-03-23 11:02:08 +00:00
parent 11e8b3017a
commit cc6df204e2
1 changed files with 23 additions and 9 deletions
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32
gst-libs/gst/gl/gstglcontext.c
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@ -656,20 +656,23 @@ _unlock_create_thread (GstGLContext * context)
g_mutex_unlock (&context->priv->render_lock);
}
static gchar *
static GString *
_build_extension_string (GstGLContext * context)
{
const GstGLFuncs *gl = context->gl_vtable;
GString *exts = g_string_sized_new (1024);
GString *ext_g_str = g_string_sized_new (1024);
const gchar *ext_const_c_str = NULL;
int i, n;
gl->GetIntegerv (GL_NUM_EXTENSIONS, &n);
for (i = 0; i < n; i++) {
g_string_append_printf (exts, "%s ", gl->GetStringi (GL_EXTENSIONS, i));
ext_const_c_str = (const gchar *) gl->GetStringi (GL_EXTENSIONS, i);
if (ext_const_c_str)
g_string_append_printf (ext_g_str, "%s ", ext_const_c_str);
}
return exts->str;
return ext_g_str;
}
//gboolean
@ -687,9 +690,11 @@ gst_gl_context_create_thread (GstGLContext * context)
gchar *api_string;
gchar *compiled_api_s;
gchar *user_api_string;
const gchar *user_choice, *extensions;
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);
@ -796,13 +801,22 @@ gst_gl_context_create_thread (GstGLContext * context)
goto failure;
/* GL core contexts and GLES3 */
if (gl->GetIntegerv && gl->GetStringi) {
extensions = _build_extension_string (context);
if (gl->GetIntegerv && gl->GetStringi)
ext_g_str = _build_extension_string (context);
if (ext_g_str->len) {
_gst_gl_feature_check_ext_functions (context, gl_major, gl_minor,
ext_g_str->str);
} else {
extensions = (const gchar *) gl->GetString (GL_EXTENSIONS);
ext_const_c_str = (const gchar *) gl->GetString (GL_EXTENSIONS);
if (!ext_const_c_str)
ext_const_c_str = "";
_gst_gl_feature_check_ext_functions (context, gl_major, gl_minor,
ext_const_c_str);
}
_gst_gl_feature_check_ext_functions (context, gl_major, gl_minor, extensions);
if (ext_g_str)
g_string_free (ext_g_str, TRUE);
context->priv->alive = TRUE;