gstreamer/gst-libs/gst/gl/x11/gstglwindow_x11_glx.c

184 lines
5.3 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 "gstglwindow_x11_glx.h"
#define GST_CAT_DEFAULT gst_gl_window_x11_glx_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
#define DEBUG_INIT \
GST_DEBUG_CATEGORY_GET (GST_CAT_DEFAULT, "glwindow");
#define gst_gl_window_x11_glx_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstGLWindowX11GLX, gst_gl_window_x11_glx,
GST_GL_TYPE_WINDOW_X11, DEBUG_INIT);
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, GstGLRendererAPI render_api, guintptr external_gl_context);
static void gst_gl_window_x11_glx_destroy_context (GstGLWindowX11 * window_x11);
static gboolean gst_gl_window_x11_glx_choose_format (GstGLWindowX11 *
window_x11);
static void
gst_gl_window_x11_glx_class_init (GstGLWindowX11GLXClass * klass)
{
GstGLWindowX11Class *window_x11_class = (GstGLWindowX11Class *) klass;
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);
}
static void
gst_gl_window_x11_glx_init (GstGLWindowX11GLX * window)
{
}
/* Must be called in the gl thread */
GstGLWindowX11GLX *
gst_gl_window_x11_glx_new (GstGLRendererAPI render_api,
guintptr external_gl_context)
{
GstGLWindowX11GLX *window = g_object_new (GST_GL_TYPE_WINDOW_X11_GLX, NULL);
gst_gl_window_x11_open_device (GST_GL_WINDOW_X11 (window), render_api,
external_gl_context);
return window;
}
static gboolean
gst_gl_window_x11_glx_create_context (GstGLWindowX11 * window_x11,
GstGLRendererAPI render_api, guintptr external_gl_context)
{
GstGLWindowX11GLX *window_glx;
window_glx = GST_GL_WINDOW_X11_GLX (window_x11);
window_glx->glx_context =
glXCreateContext (window_x11->device, window_x11->visual_info,
(GLXContext) external_gl_context, TRUE);
if (!window_glx->glx_context) {
GST_WARNING ("failed to create opengl context (glXCreateContext failed)");
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)
{
gint error_base;
gint event_base;
gint attrib[] = {
GLX_RGBA,
GLX_RED_SIZE, 1, GLX_GREEN_SIZE, 1, GLX_BLUE_SIZE, 1,
GLX_DEPTH_SIZE, 16,
GLX_DOUBLEBUFFER,
None
};
if (!glXQueryExtension (window_x11->device, &error_base, &event_base)) {
GST_WARNING ("No GLX extension");
goto failure;
}
window_x11->visual_info = glXChooseVisual (window_x11->device,
window_x11->screen_num, attrib);
if (!window_x11->visual_info) {
GST_WARNING ("glx visual is null (bad attributes)");
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;
}