gstreamer/gst-libs/gst/gl/x11/gstglwindow_x11_glx.c
Matthew Waters 52c31328e2 [693/906] x11_glx: ask for a 3.0 GL Context
(falling back if needed)
2014-03-15 18:36:55 +01:00

362 lines
11 KiB
C

/*
* GStreamer
* Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>
* Copyright (C) 2012 Matthew Waters <ystreet00@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#define GLIB_DISABLE_DEPRECATION_WARNINGS
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gstglfeature.h>
#include "gstglwindow_x11_glx.h"
#define GST_CAT_DEFAULT gst_gl_window_debug
#define gst_gl_window_x11_glx_parent_class parent_class
G_DEFINE_TYPE (GstGLWindowX11GLX, gst_gl_window_x11_glx,
GST_GL_TYPE_WINDOW_X11);
#define GST_GL_WINDOW_X11_GLX_GET_PRIVATE(o) \
(G_TYPE_INSTANCE_GET_PRIVATE((o), GST_GL_TYPE_WINDOW_X11_GLX, GstGLWindowX11GLXPrivate))
static guintptr gst_gl_window_x11_glx_get_gl_context (GstGLWindowX11 *
window_x11);
static void gst_gl_window_x11_glx_swap_buffers (GstGLWindowX11 * window_x11);
static gboolean gst_gl_window_x11_glx_activate (GstGLWindowX11 * window_x11,
gboolean activate);
static gboolean gst_gl_window_x11_glx_create_context (GstGLWindowX11 *
window_x11, GstGLAPI gl_api, guintptr external_gl_context, GError ** error);
static void gst_gl_window_x11_glx_destroy_context (GstGLWindowX11 * window_x11);
static gboolean gst_gl_window_x11_glx_choose_format (GstGLWindowX11 *
window_x11, GError ** error);
GstGLAPI gst_gl_window_x11_glx_get_gl_api (GstGLWindow * window);
static gpointer gst_gl_window_x11_glx_get_proc_address (GstGLWindow * window,
const gchar * name);
struct _GstGLWindowX11GLXPrivate
{
int glx_major;
int glx_minor;
GstGLAPI context_api;
GLXFBConfig *fbconfigs;
GLXContext (*glXCreateContextAttribsARB) (Display *, GLXFBConfig,
GLXContext, Bool, const int *);
};
static void
gst_gl_window_x11_glx_class_init (GstGLWindowX11GLXClass * klass)
{
GstGLWindowClass *window_class = (GstGLWindowClass *) klass;
GstGLWindowX11Class *window_x11_class = (GstGLWindowX11Class *) klass;
g_type_class_add_private (klass, sizeof (GstGLWindowX11GLXPrivate));
window_x11_class->get_gl_context =
GST_DEBUG_FUNCPTR (gst_gl_window_x11_glx_get_gl_context);
window_x11_class->activate =
GST_DEBUG_FUNCPTR (gst_gl_window_x11_glx_activate);
window_x11_class->create_context =
GST_DEBUG_FUNCPTR (gst_gl_window_x11_glx_create_context);
window_x11_class->destroy_context =
GST_DEBUG_FUNCPTR (gst_gl_window_x11_glx_destroy_context);
window_x11_class->choose_format =
GST_DEBUG_FUNCPTR (gst_gl_window_x11_glx_choose_format);
window_x11_class->swap_buffers =
GST_DEBUG_FUNCPTR (gst_gl_window_x11_glx_swap_buffers);
window_class->get_gl_api =
GST_DEBUG_FUNCPTR (gst_gl_window_x11_glx_get_gl_api);
window_class->get_proc_address =
GST_DEBUG_FUNCPTR (gst_gl_window_x11_glx_get_proc_address);
}
static void
gst_gl_window_x11_glx_init (GstGLWindowX11GLX * window)
{
window->priv = GST_GL_WINDOW_X11_GLX_GET_PRIVATE (window);
}
/* Must be called in the gl thread */
GstGLWindowX11GLX *
gst_gl_window_x11_glx_new (void)
{
GstGLWindowX11GLX *window = g_object_new (GST_GL_TYPE_WINDOW_X11_GLX, NULL);
return window;
}
static inline void
_describe_fbconfig (Display * display, GLXFBConfig config)
{
int val;
glXGetFBConfigAttrib (display, config, GLX_FBCONFIG_ID, &val);
GST_DEBUG ("ID: %d", val);
glXGetFBConfigAttrib (display, config, GLX_DOUBLEBUFFER, &val);
GST_DEBUG ("double buffering: %d", val);
glXGetFBConfigAttrib (display, config, GLX_RED_SIZE, &val);
GST_DEBUG ("red: %d", val);
glXGetFBConfigAttrib (display, config, GLX_GREEN_SIZE, &val);
GST_DEBUG ("green: %d", val);
glXGetFBConfigAttrib (display, config, GLX_BLUE_SIZE, &val);
GST_DEBUG ("blue: %d", val);
glXGetFBConfigAttrib (display, config, GLX_ALPHA_SIZE, &val);
GST_DEBUG ("alpha: %d", val);
glXGetFBConfigAttrib (display, config, GLX_DEPTH_SIZE, &val);
GST_DEBUG ("depth: %d", val);
glXGetFBConfigAttrib (display, config, GLX_STENCIL_SIZE, &val);
GST_DEBUG ("stencil: %d", val);
}
static gboolean
gst_gl_window_x11_glx_create_context (GstGLWindowX11 * window_x11,
GstGLAPI gl_api, guintptr external_gl_context, GError ** error)
{
GstGLWindowX11GLX *window_glx;
gboolean create_context;
const char *glx_exts;
int x_error;
window_glx = GST_GL_WINDOW_X11_GLX (window_x11);
glx_exts =
glXQueryExtensionsString (window_x11->device,
DefaultScreen (window_x11->device));
create_context = gst_gl_check_extension ("GLX_ARB_create_context", glx_exts);
window_glx->priv->glXCreateContextAttribsARB =
(gpointer) glXGetProcAddressARB ((const GLubyte *)
"glXCreateContextAttribsARB");
if (create_context && window_glx->priv->glXCreateContextAttribsARB) {
int context_attribs_3[] = {
GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
GLX_CONTEXT_MINOR_VERSION_ARB, 0,
//GLX_CONTEXT_FLAGS_ARB , GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB,
None
};
int context_attribs_pre_3[] = {
GLX_CONTEXT_MAJOR_VERSION_ARB, 1,
GLX_CONTEXT_MINOR_VERSION_ARB, 4,
None
};
gst_gl_window_x11_trap_x_errors ();
window_glx->glx_context =
window_glx->priv->glXCreateContextAttribsARB (window_x11->device,
window_glx->priv->fbconfigs[0], (GLXContext) external_gl_context, True,
context_attribs_3);
x_error = gst_gl_window_x11_untrap_x_errors ();
window_glx->priv->context_api = GST_GL_API_OPENGL3 | GST_GL_API_OPENGL;
if (!window_glx->glx_context || x_error != 0) {
GST_DEBUG ("Failed to create an Opengl 3 context. trying a legacy one");
gst_gl_window_x11_trap_x_errors ();
window_glx->glx_context =
window_glx->priv->glXCreateContextAttribsARB (window_x11->device,
window_glx->priv->fbconfigs[0], (GLXContext) external_gl_context,
True, context_attribs_pre_3);
x_error = gst_gl_window_x11_untrap_x_errors ();
if (x_error != 0)
window_glx->glx_context = NULL;
window_glx->priv->context_api = GST_GL_API_OPENGL;
}
} else {
window_glx->glx_context =
glXCreateContext (window_x11->device, window_x11->visual_info,
(GLXContext) external_gl_context, TRUE);
window_glx->priv->context_api = GST_GL_API_OPENGL;
}
if (window_glx->priv->fbconfigs)
XFree (window_glx->priv->fbconfigs);
if (!window_glx->glx_context) {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_CREATE_CONTEXT,
"Failed to create opengl context");
goto failure;
}
GST_LOG ("gl context id: %ld", (gulong) window_glx->glx_context);
return TRUE;
failure:
return FALSE;
}
static void
gst_gl_window_x11_glx_destroy_context (GstGLWindowX11 * window_x11)
{
GstGLWindowX11GLX *window_glx;
window_glx = GST_GL_WINDOW_X11_GLX (window_x11);
glXDestroyContext (window_x11->device, window_glx->glx_context);
window_glx->glx_context = 0;
}
static gboolean
gst_gl_window_x11_glx_choose_format (GstGLWindowX11 * window_x11,
GError ** error)
{
GstGLWindowX11GLX *window_glx;
gint error_base;
gint event_base;
window_glx = GST_GL_WINDOW_X11_GLX (window_x11);
if (!glXQueryExtension (window_x11->device, &error_base, &event_base)) {
g_set_error (error, GST_GL_WINDOW_ERROR,
GST_GL_WINDOW_ERROR_RESOURCE_UNAVAILABLE, "No GLX extension");
goto failure;
}
if (!glXQueryVersion (window_x11->device, &window_glx->priv->glx_major,
&window_glx->priv->glx_minor)) {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_CREATE_CONTEXT,
"Failed to query GLX version (glXQueryVersion failed)");
goto failure;
}
GST_INFO ("GLX Version: %d.%d", window_glx->priv->glx_major,
window_glx->priv->glx_minor);
/* legacy case */
if (window_glx->priv->glx_major < 1 || (window_glx->priv->glx_major == 1
&& window_glx->priv->glx_minor < 3)) {
gint attribs[] = {
GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_DEPTH_SIZE, 16,
GLX_DOUBLEBUFFER,
None
};
window_x11->visual_info = glXChooseVisual (window_x11->device,
window_x11->screen_num, attribs);
if (!window_x11->visual_info) {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_WRONG_CONFIG,
"Bad attributes in glXChooseVisual");
goto failure;
}
} else {
gint attribs[] = {
GLX_RENDER_TYPE, GLX_RGBA_BIT,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_DEPTH_SIZE, 16,
GLX_DOUBLEBUFFER, True,
None
};
int fbcount;
window_glx->priv->fbconfigs = glXChooseFBConfig (window_x11->device,
DefaultScreen (window_x11->device), attribs, &fbcount);
if (!window_glx->priv->fbconfigs) {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_WRONG_CONFIG,
"Could not find any FBConfig's to use (check attributes?)");
goto failure;
}
_describe_fbconfig (window_x11->device, window_glx->priv->fbconfigs[0]);
window_x11->visual_info = glXGetVisualFromFBConfig (window_x11->device,
window_glx->priv->fbconfigs[0]);
if (!window_x11->visual_info) {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_WRONG_CONFIG,
"Bad attributes in FBConfig");
goto failure;
}
}
return TRUE;
failure:
return FALSE;
}
static void
gst_gl_window_x11_glx_swap_buffers (GstGLWindowX11 * window_x11)
{
glXSwapBuffers (window_x11->device, window_x11->internal_win_id);
}
static guintptr
gst_gl_window_x11_glx_get_gl_context (GstGLWindowX11 * window_x11)
{
return (guintptr) GST_GL_WINDOW_X11_GLX (window_x11)->glx_context;
}
static gboolean
gst_gl_window_x11_glx_activate (GstGLWindowX11 * window_x11, gboolean activate)
{
gboolean result;
if (activate) {
result = glXMakeCurrent (window_x11->device, window_x11->internal_win_id,
GST_GL_WINDOW_X11_GLX (window_x11)->glx_context);
} else {
result = glXMakeCurrent (window_x11->device, None, NULL);
}
return result;
}
GstGLAPI
gst_gl_window_x11_glx_get_gl_api (GstGLWindow * window)
{
GstGLWindowX11GLX *window_glx;
window_glx = GST_GL_WINDOW_X11_GLX (window);
return window_glx->priv->context_api;
}
static gpointer
gst_gl_window_x11_glx_get_proc_address (GstGLWindow * window,
const gchar * name)
{
gpointer result;
if (!(result = glXGetProcAddressARB ((const GLubyte *) name))) {
result = gst_gl_window_default_get_proc_address (window, name);
}
return result;
}