gstreamer/gst-libs/gst/gl/x11/gstglcontext_glx.c

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/*
* 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
/* FIXME: Sharing contexts requires the Display to be the same.
* May need to box it
*/
#include <gst/gst.h>
#include "../gstgl_fwd.h"
#include <gst/gl/gstglcontext.h>
#include <gst/gl/gl.h>
#include "gstglcontext_glx.h"
#define GST_CAT_DEFAULT gst_gl_window_debug
#define gst_gl_context_glx_parent_class parent_class
G_DEFINE_TYPE (GstGLContextGLX, gst_gl_context_glx, GST_GL_TYPE_CONTEXT);
#define GST_GL_CONTEXT_GLX_GET_PRIVATE(o) \
(G_TYPE_INSTANCE_GET_PRIVATE((o), GST_GL_TYPE_CONTEXT_GLX, GstGLContextGLXPrivate))
static guintptr gst_gl_context_glx_get_gl_context (GstGLContext * context);
static void gst_gl_context_glx_swap_buffers (GstGLContext * context);
static gboolean gst_gl_context_glx_activate (GstGLContext * context,
gboolean activate);
static gboolean gst_gl_context_glx_create_context (GstGLContext *
context, GstGLAPI gl_api, GstGLContext * other_context, GError ** error);
static void gst_gl_context_glx_destroy_context (GstGLContext * context);
static gboolean gst_gl_context_glx_choose_format (GstGLContext *
context, GError ** error);
GstGLAPI gst_gl_context_glx_get_gl_api (GstGLContext * context);
static GstGLPlatform gst_gl_context_glx_get_gl_platform (GstGLContext *
context);
struct _GstGLContextGLXPrivate
{
int glx_major;
int glx_minor;
GstGLAPI context_api;
GLXFBConfig *fbconfigs;
GLXContext (*glXCreateContextAttribsARB) (Display *, GLXFBConfig,
GLXContext, Bool, const int *);
};
static void
gst_gl_context_glx_class_init (GstGLContextGLXClass * klass)
{
GstGLContextClass *context_class = (GstGLContextClass *) klass;
g_type_class_add_private (klass, sizeof (GstGLContextGLXPrivate));
context_class->get_gl_context =
GST_DEBUG_FUNCPTR (gst_gl_context_glx_get_gl_context);
context_class->activate = GST_DEBUG_FUNCPTR (gst_gl_context_glx_activate);
context_class->create_context =
GST_DEBUG_FUNCPTR (gst_gl_context_glx_create_context);
context_class->destroy_context =
GST_DEBUG_FUNCPTR (gst_gl_context_glx_destroy_context);
context_class->choose_format =
GST_DEBUG_FUNCPTR (gst_gl_context_glx_choose_format);
context_class->swap_buffers =
GST_DEBUG_FUNCPTR (gst_gl_context_glx_swap_buffers);
context_class->get_gl_api = GST_DEBUG_FUNCPTR (gst_gl_context_glx_get_gl_api);
context_class->get_gl_platform =
GST_DEBUG_FUNCPTR (gst_gl_context_glx_get_gl_platform);
context_class->get_proc_address =
GST_DEBUG_FUNCPTR (gst_gl_context_glx_get_proc_address);
context_class->get_current_context =
GST_DEBUG_FUNCPTR (gst_gl_context_glx_get_current_context);
}
static void
gst_gl_context_glx_init (GstGLContextGLX * context)
{
context->priv = GST_GL_CONTEXT_GLX_GET_PRIVATE (context);
}
GstGLContextGLX *
gst_gl_context_glx_new (void)
{
GstGLContextGLX *window = g_object_new (GST_GL_TYPE_CONTEXT_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_context_glx_create_context (GstGLContext * context,
GstGLAPI gl_api, GstGLContext * other_context, GError ** error)
{
GstGLContextGLX *context_glx;
GstGLWindow *window;
GstGLWindowX11 *window_x11;
GstGLDisplay *display;
gboolean create_context;
const char *glx_exts;
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int x_error = 0;
Display *device;
guintptr external_gl_context = 0;
context_glx = GST_GL_CONTEXT_GLX (context);
window = gst_gl_context_get_window (context);
window_x11 = GST_GL_WINDOW_X11 (window);
display = gst_gl_context_get_display (context);
if (other_context) {
if (gst_gl_context_get_gl_platform (other_context) != GST_GL_PLATFORM_GLX) {
g_set_error (error, GST_GL_CONTEXT_ERROR,
GST_GL_CONTEXT_ERROR_WRONG_CONFIG,
"Cannot share context with non-GLX context");
goto failure;
}
external_gl_context = gst_gl_context_get_gl_context (other_context);
}
device = (Display *) gst_gl_display_get_handle (display);
glx_exts = glXQueryExtensionsString (device, DefaultScreen (device));
create_context = gst_gl_check_extension ("GLX_ARB_create_context", glx_exts);
context_glx->priv->glXCreateContextAttribsARB =
(gpointer) glXGetProcAddressARB ((const GLubyte *)
"glXCreateContextAttribsARB");
if (create_context && context_glx->priv->glXCreateContextAttribsARB) {
int context_attribs_3[] = {
GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
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GLX_CONTEXT_MINOR_VERSION_ARB, 1,
GLX_CONTEXT_FLAGS_ARB, GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB,
#if !defined(GST_DISABLE_GST_DEBUG)
GLX_CONTEXT_FLAGS_ARB, GLX_CONTEXT_DEBUG_BIT_ARB,
#endif
None
};
int context_attribs_pre_3[] = {
GLX_CONTEXT_MAJOR_VERSION_ARB, 1,
GLX_CONTEXT_MINOR_VERSION_ARB, 4,
None
};
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if (gl_api & GST_GL_API_OPENGL3) {
GST_DEBUG_OBJECT (window, "trying to create a GL 3.1 core context");
gst_gl_window_x11_trap_x_errors ();
context_glx->glx_context =
context_glx->priv->glXCreateContextAttribsARB (device,
context_glx->priv->fbconfigs[0], (GLXContext) external_gl_context,
True, context_attribs_3);
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x_error = gst_gl_window_x11_untrap_x_errors ();
if (x_error != 0)
context_glx->glx_context = NULL;
context_glx->priv->context_api = GST_GL_API_OPENGL3;
}
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if (gl_api & GST_GL_API_OPENGL && context_glx->glx_context == NULL) {
GST_DEBUG_OBJECT (window, "trying to create a GL 1.4 context");
gst_gl_window_x11_trap_x_errors ();
context_glx->glx_context =
context_glx->priv->glXCreateContextAttribsARB (device,
context_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)
context_glx->glx_context = NULL;
context_glx->priv->context_api = GST_GL_API_OPENGL;
}
} else {
context_glx->glx_context =
glXCreateContext (device, window_x11->visual_info,
(GLXContext) external_gl_context, TRUE);
context_glx->priv->context_api = GST_GL_API_OPENGL;
}
if (context_glx->priv->fbconfigs)
XFree (context_glx->priv->fbconfigs);
if (!context_glx->glx_context) {
g_set_error (error, GST_GL_CONTEXT_ERROR,
GST_GL_CONTEXT_ERROR_CREATE_CONTEXT, "Failed to create opengl context");
goto failure;
}
GST_LOG ("gl context id: %ld", (gulong) context_glx->glx_context);
gst_object_unref (window);
gst_object_unref (display);
return TRUE;
failure:
if (window)
gst_object_unref (window);
gst_object_unref (display);
return FALSE;
}
static void
gst_gl_context_glx_destroy_context (GstGLContext * context)
{
GstGLWindow *window;
GstGLContextGLX *context_glx;
Display *device;
context_glx = GST_GL_CONTEXT_GLX (context);
window = gst_gl_context_get_window (context);
device = (Display *) gst_gl_display_get_handle (window->display);
glXDestroyContext (device, context_glx->glx_context);
context_glx->glx_context = 0;
gst_object_unref (window);
}
static gboolean
gst_gl_context_glx_choose_format (GstGLContext * context, GError ** error)
{
GstGLContextGLX *context_glx;
GstGLWindow *window;
GstGLWindowX11 *window_x11;
gint error_base;
gint event_base;
Display *device;
context_glx = GST_GL_CONTEXT_GLX (context);
window = gst_gl_context_get_window (context);
window_x11 = GST_GL_WINDOW_X11 (window);
device = (Display *) gst_gl_display_get_handle (window->display);
if (!glXQueryExtension (device, &error_base, &event_base)) {
g_set_error (error, GST_GL_CONTEXT_ERROR,
GST_GL_CONTEXT_ERROR_RESOURCE_UNAVAILABLE, "No GLX extension");
goto failure;
}
if (!glXQueryVersion (device, &context_glx->priv->glx_major,
&context_glx->priv->glx_minor)) {
g_set_error (error, GST_GL_CONTEXT_ERROR,
GST_GL_CONTEXT_ERROR_CREATE_CONTEXT,
"Failed to query GLX version (glXQueryVersion failed)");
goto failure;
}
GST_INFO ("GLX Version: %d.%d", context_glx->priv->glx_major,
context_glx->priv->glx_minor);
/* legacy case */
if (context_glx->priv->glx_major < 1 || (context_glx->priv->glx_major == 1
&& context_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 (device,
window_x11->screen_num, attribs);
if (!window_x11->visual_info) {
g_set_error (error, GST_GL_CONTEXT_ERROR,
GST_GL_CONTEXT_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;
context_glx->priv->fbconfigs = glXChooseFBConfig (device,
DefaultScreen (device), attribs, &fbcount);
if (!context_glx->priv->fbconfigs) {
g_set_error (error, GST_GL_CONTEXT_ERROR,
GST_GL_CONTEXT_ERROR_WRONG_CONFIG,
"Could not find any FBConfig's to use (check attributes?)");
goto failure;
}
_describe_fbconfig (device, context_glx->priv->fbconfigs[0]);
window_x11->visual_info = glXGetVisualFromFBConfig (device,
context_glx->priv->fbconfigs[0]);
if (!window_x11->visual_info) {
g_set_error (error, GST_GL_CONTEXT_ERROR,
GST_GL_CONTEXT_ERROR_WRONG_CONFIG, "Bad attributes in FBConfig");
goto failure;
}
}
gst_gl_window_x11_create_window ((GstGLWindowX11 *) window);
gst_object_unref (window);
return TRUE;
failure:
if (window)
gst_object_unref (window);
return FALSE;
}
static void
gst_gl_context_glx_swap_buffers (GstGLContext * context)
{
GstGLWindow *window = gst_gl_context_get_window (context);
Display *device = (Display *) gst_gl_display_get_handle (window->display);
Window window_handle = (Window) gst_gl_window_get_window_handle (window);
glXSwapBuffers (device, window_handle);
gst_object_unref (window);
}
static guintptr
gst_gl_context_glx_get_gl_context (GstGLContext * context)
{
return (guintptr) GST_GL_CONTEXT_GLX (context)->glx_context;
}
static gboolean
gst_gl_context_glx_activate (GstGLContext * context, gboolean activate)
{
GstGLWindow *window = gst_gl_context_get_window (context);
Display *device = (Display *) gst_gl_display_get_handle (window->display);
Window window_handle = (Window) gst_gl_window_get_window_handle (window);
gboolean result;
if (activate) {
result = glXMakeCurrent (device, window_handle,
GST_GL_CONTEXT_GLX (context)->glx_context);
} else {
result = glXMakeCurrent (device, None, NULL);
}
gst_object_unref (window);
return result;
}
GstGLAPI
gst_gl_context_glx_get_gl_api (GstGLContext * context)
{
GstGLContextGLX *context_glx;
context_glx = GST_GL_CONTEXT_GLX (context);
return context_glx->priv->context_api;
}
static GstGLPlatform
gst_gl_context_glx_get_gl_platform (GstGLContext * context)
{
return GST_GL_PLATFORM_GLX;
}
gpointer
gst_gl_context_glx_get_proc_address (GstGLContext * context, const gchar * name)
{
gpointer result;
GstGLAPI gl_api = gst_gl_context_get_gl_api (context);
if (!(result = gst_gl_context_default_get_proc_address (gl_api, name))) {
result = glXGetProcAddressARB ((const GLubyte *) name);
}
return result;
}
guintptr
gst_gl_context_glx_get_current_context (void)
{
return (guintptr) glXGetCurrentContext ();
}