gstreamer/gst-libs/gst/gl/win32/gstglwindow_win32_wgl.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
#include <gst/gst.h>
#include "gstglwindow_win32_wgl.h"
#define GST_CAT_DEFAULT gst_gl_window_debug
#define gst_gl_window_win32_wgl_parent_class parent_class
G_DEFINE_TYPE (GstGLWindowWin32WGL, gst_gl_window_win32_wgl,
GST_GL_TYPE_WINDOW_WIN32);
static guintptr gst_gl_window_win32_wgl_get_gl_context (GstGLWindowWin32 *
window_win32);
static void gst_gl_window_win32_wgl_swap_buffers (GstGLWindowWin32 *
window_win32);
static gboolean gst_gl_window_win32_wgl_choose_format (GstGLWindowWin32 *
window_win32);
static gboolean gst_gl_window_win32_wgl_activate (GstGLWindowWin32 *
window_win32, gboolean activate);
static gboolean gst_gl_window_win32_wgl_create_context (GstGLWindowWin32 *
window_win32, GstGLAPI gl_api, guintptr external_gl_context,
GError ** error);
static void gst_gl_window_win32_wgl_destroy_context (GstGLWindowWin32 *
window_win32);
GstGLAPI gst_gl_window_win32_wgl_get_gl_api (GstGLWindow * window);
static void
gst_gl_window_win32_wgl_class_init (GstGLWindowWin32WGLClass * klass)
{
GstGLWindowClass *window_class = (GstGLWindowClass *) klass;
GstGLWindowWin32Class *window_win32_class = (GstGLWindowWin32Class *) klass;
window_win32_class->get_gl_context =
GST_DEBUG_FUNCPTR (gst_gl_window_win32_wgl_get_gl_context);
window_win32_class->choose_format =
GST_DEBUG_FUNCPTR (gst_gl_window_win32_wgl_choose_format);
window_win32_class->activate =
GST_DEBUG_FUNCPTR (gst_gl_window_win32_wgl_activate);
window_win32_class->create_context =
GST_DEBUG_FUNCPTR (gst_gl_window_win32_wgl_create_context);
window_win32_class->destroy_context =
GST_DEBUG_FUNCPTR (gst_gl_window_win32_wgl_destroy_context);
window_win32_class->swap_buffers =
GST_DEBUG_FUNCPTR (gst_gl_window_win32_wgl_swap_buffers);
window_class->get_gl_api =
GST_DEBUG_FUNCPTR (gst_gl_window_win32_wgl_get_gl_api);
}
static void
gst_gl_window_win32_wgl_init (GstGLWindowWin32WGL * window)
{
}
/* Must be called in the gl thread */
GstGLWindowWin32WGL *
gst_gl_window_win32_wgl_new (GstGLAPI gl_api, guintptr external_gl_context,
GError ** error)
{
GstGLWindowWin32WGL *window =
g_object_new (GST_GL_TYPE_WINDOW_WIN32_WGL, NULL);
gst_gl_window_win32_open_device (GST_GL_WINDOW_WIN32 (window), error);
return window;
}
static gboolean
gst_gl_window_win32_wgl_create_context (GstGLWindowWin32 * window_win32,
GstGLAPI gl_api, guintptr external_gl_context, GError ** error)
{
GstGLWindowWin32WGL *window_wgl;
window_wgl = GST_GL_WINDOW_WIN32_WGL (window_win32);
window_wgl->wgl_context = wglCreateContext (window_win32->device);
if (window_wgl->wgl_context)
GST_DEBUG ("gl context created: %" G_GUINTPTR_FORMAT,
(guintptr) window_wgl->wgl_context);
else {
g_set_error (error, GST_GL_WINDOW_ERROR, GST_GL_WINDOW_ERROR_CREATE_CONTEXT,
"failed to create glcontext:%lu", GetLastError ());
goto failure;
}
g_assert (window_wgl->wgl_context);
GST_LOG ("gl context id: %ld", (gulong) window_wgl->wgl_context);
return TRUE;
failure:
return FALSE;
}
static void
gst_gl_window_win32_wgl_destroy_context (GstGLWindowWin32 * window_win32)
{
GstGLWindowWin32WGL *window_wgl;
window_wgl = GST_GL_WINDOW_WIN32_WGL (window_win32);
if (window_wgl->wgl_context)
wglDeleteContext (window_wgl->wgl_context);
window_wgl->wgl_context = 0;
}
static gboolean
gst_gl_window_win32_wgl_choose_format (GstGLWindowWin32 * window_win32)
{
PIXELFORMATDESCRIPTOR pfd;
gint pixelformat = 0;
gboolean res = FALSE;
pfd.nSize = sizeof (PIXELFORMATDESCRIPTOR);
pfd.nVersion = 1;
pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
pfd.iPixelType = PFD_TYPE_RGBA;
pfd.cColorBits = 24;
pfd.cRedBits = 8;
pfd.cRedShift = 0;
pfd.cGreenBits = 8;
pfd.cGreenShift = 0;
pfd.cBlueBits = 8;
pfd.cBlueShift = 0;
pfd.cAlphaBits = 0;
pfd.cAlphaShift = 0;
pfd.cAccumBits = 0;
pfd.cAccumRedBits = 0;
pfd.cAccumGreenBits = 0;
pfd.cAccumBlueBits = 0;
pfd.cAccumAlphaBits = 0;
pfd.cDepthBits = 24;
pfd.cStencilBits = 8;
pfd.cAuxBuffers = 0;
pfd.iLayerType = PFD_MAIN_PLANE;
pfd.bReserved = 0;
pfd.dwLayerMask = 0;
pfd.dwVisibleMask = 0;
pfd.dwDamageMask = 0;
pfd.cColorBits = (BYTE) GetDeviceCaps (window_win32->device, BITSPIXEL);
pixelformat = ChoosePixelFormat (window_win32->device, &pfd);
g_return_val_if_fail (pixelformat, FALSE);
res = SetPixelFormat (window_win32->device, pixelformat, &pfd);
return res;
}
static void
gst_gl_window_win32_wgl_swap_buffers (GstGLWindowWin32 * window_win32)
{
SwapBuffers (window_win32->device);
}
static guintptr
gst_gl_window_win32_wgl_get_gl_context (GstGLWindowWin32 * window_win32)
{
return (guintptr) GST_GL_WINDOW_WIN32_WGL (window_win32)->wgl_context;
}
static gboolean
gst_gl_window_win32_wgl_activate (GstGLWindowWin32 * window_win32,
gboolean activate)
{
gboolean result;
if (activate) {
result = wglMakeCurrent (window_win32->device,
GST_GL_WINDOW_WIN32_WGL (window_win32)->wgl_context);
} else {
result = wglMakeCurrent (NULL, NULL);
}
return result;
}
GstGLAPI
gst_gl_window_win32_wgl_get_gl_api (GstGLWindow * window)
{
return GST_GL_API_OPENGL;
}