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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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87a1652216
The external opengl context must be specify when creating our OpenGL context (glx) or just after (wgl). When calling glXCreateContext or wglShareLists, the external opengl context must not be current. Then our gl context can be current in the gl thread while the external gl context is current in an other thread. See tests/examples/clutter/cluttershare.c
568 lines
14 KiB
C
568 lines
14 KiB
C
/*
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* GStreamer
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* Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#undef UNICODE
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#include <windows.h>
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#define UNICODE
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#include "gstglwindow.h"
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#define WM_GST_GL_WINDOW_CUSTOM (WM_APP+1)
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#define WM_GST_GL_WINDOW_QUIT (WM_APP+2)
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void gst_gl_window_set_pixel_format (GstGLWindow * window);
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LRESULT CALLBACK window_proc (HWND hWnd, UINT uMsg, WPARAM wParam,
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LPARAM lParam);
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LRESULT FAR PASCAL sub_class_proc (HWND hWnd, UINT uMsg, WPARAM wParam,
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LPARAM lParam);
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#define GST_GL_WINDOW_GET_PRIVATE(o) \
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(G_TYPE_INSTANCE_GET_PRIVATE((o), GST_GL_TYPE_WINDOW, GstGLWindowPrivate))
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enum
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{
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PROP_0
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};
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struct _GstGLWindowPrivate
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{
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HWND internal_win_id;
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HDC device;
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HGLRC gl_context;
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HGLRC external_gl_context;
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GstGLWindowCB draw_cb;
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gpointer draw_data;
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GstGLWindowCB2 resize_cb;
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gpointer resize_data;
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GstGLWindowCB close_cb;
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gpointer close_data;
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gboolean is_closed;
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gboolean visible;
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};
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G_DEFINE_TYPE (GstGLWindow, gst_gl_window, G_TYPE_OBJECT);
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#undef G_LOG_DOMAIN
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#define G_LOG_DOMAIN "GstGLWindow"
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gboolean _gst_gl_window_debug = FALSE;
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HHOOK hHook;
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/* Must be called in the gl thread */
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static void
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gst_gl_window_finalize (GObject * object)
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{
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GstGLWindow *window = GST_GL_WINDOW (object);
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GstGLWindowPrivate *priv = window->priv;
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G_OBJECT_CLASS (gst_gl_window_parent_class)->finalize (object);
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}
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static void
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gst_gl_window_log_handler (const gchar * domain, GLogLevelFlags flags,
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const gchar * message, gpointer user_data)
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{
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if (_gst_gl_window_debug) {
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g_log_default_handler (domain, flags, message, user_data);
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}
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}
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static void
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gst_gl_window_base_init (gpointer g_class)
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{
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}
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static void
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gst_gl_window_class_init (GstGLWindowClass * klass)
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{
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GObjectClass *obj_class = G_OBJECT_CLASS (klass);
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WNDCLASS wc;
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ATOM atom = 0;
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HINSTANCE hinstance = GetModuleHandle (NULL);
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g_type_class_add_private (klass, sizeof (GstGLWindowPrivate));
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obj_class->finalize = gst_gl_window_finalize;
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atom = GetClassInfo (hinstance, "GSTGL", &wc);
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if (atom == 0) {
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ZeroMemory (&wc, sizeof (WNDCLASS));
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wc.lpfnWndProc = window_proc;
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wc.cbClsExtra = 0;
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wc.cbWndExtra = 0;
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wc.hInstance = hinstance;
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wc.hIcon = LoadIcon (NULL, IDI_WINLOGO);
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wc.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
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wc.hCursor = LoadCursor (NULL, IDC_ARROW);
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wc.hbrBackground = (HBRUSH) GetStockObject (BLACK_BRUSH);
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wc.lpszMenuName = NULL;
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wc.lpszClassName = "GSTGL";
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atom = RegisterClass (&wc);
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if (atom == 0)
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g_error ("Failed to register window class %x\r\n", GetLastError ());
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}
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}
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static void
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gst_gl_window_init (GstGLWindow * window)
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{
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window->priv = GST_GL_WINDOW_GET_PRIVATE (window);
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if (g_getenv ("GST_GL_WINDOW_DEBUG") != NULL)
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_gst_gl_window_debug = TRUE;
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g_log_set_handler ("GstGLWindow", G_LOG_LEVEL_DEBUG,
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gst_gl_window_log_handler, NULL);
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}
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/* Must be called in the gl thread */
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GstGLWindow *
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gst_gl_window_new (gint width, gint height, guint64 external_gl_context)
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{
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GstGLWindow *window = g_object_new (GST_GL_TYPE_WINDOW, NULL);
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GstGLWindowPrivate *priv = window->priv;
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GstGLWindowClass *klass = GST_GL_WINDOW_GET_CLASS (window);
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HINSTANCE hinstance = GetModuleHandle (NULL);
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static gint x = 0;
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static gint y = 0;
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x += 20;
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y += 20;
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priv->internal_win_id = 0;
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priv->device = 0;
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priv->gl_context = 0;
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priv->external_gl_context = (HGLRC) external_gl_context;
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priv->draw_cb = NULL;
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priv->draw_data = NULL;
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priv->resize_cb = NULL;
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priv->resize_data = NULL;
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priv->close_cb = NULL;
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priv->close_data = NULL;
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priv->is_closed = FALSE;
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priv->visible = FALSE;
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width += 2 * GetSystemMetrics (SM_CXSIZEFRAME);
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height +=
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2 * GetSystemMetrics (SM_CYSIZEFRAME) + GetSystemMetrics (SM_CYCAPTION);
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priv->internal_win_id = CreateWindowEx (0,
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"GSTGL",
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"OpenGL renderer",
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WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW,
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x, y, width, height, (HWND) NULL, (HMENU) NULL, hinstance, window);
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if (!priv->internal_win_id) {
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g_debug ("failed to create gl window: %d\n", priv->internal_win_id);
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return NULL;
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}
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g_debug ("gl window created: %d\n", priv->internal_win_id);
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//device is set in the window_proc
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g_assert (priv->device);
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ShowCursor (TRUE);
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return window;
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}
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GQuark
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gst_gl_window_error_quark (void)
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{
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return g_quark_from_static_string ("gst-gl-window-error");
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}
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void
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gst_gl_window_set_external_window_id (GstGLWindow * window, guint64 id)
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{
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GstGLWindowPrivate *priv = window->priv;
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WNDPROC window_parent_proc =
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(WNDPROC) (guint64) GetWindowLongPtr ((HWND) id, GWL_WNDPROC);
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RECT rect;
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SetProp (priv->internal_win_id, "gl_window_parent_id", (HWND) id);
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SetProp ((HWND) id, "gl_window_id", priv->internal_win_id);
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SetProp ((HWND) id, "gl_window_parent_proc", (WNDPROC) window_parent_proc);
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SetWindowLongPtr ((HWND) id, GWL_WNDPROC, (DWORD) (guint64) sub_class_proc);
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SetWindowLongPtr (priv->internal_win_id, GWL_STYLE, WS_CHILD | WS_MAXIMIZE);
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SetParent (priv->internal_win_id, (HWND) id);
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//take changes into account: SWP_FRAMECHANGED
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GetClientRect ((HWND) id, &rect);
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SetWindowPos (priv->internal_win_id, HWND_TOP, rect.left, rect.top,
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rect.right, rect.bottom,
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SWP_ASYNCWINDOWPOS | SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
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SWP_FRAMECHANGED | SWP_NOACTIVATE);
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MoveWindow (priv->internal_win_id, rect.left, rect.top, rect.right,
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rect.bottom, FALSE);
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}
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/* Must be called in the gl thread */
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void
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gst_gl_window_set_draw_callback (GstGLWindow * window, GstGLWindowCB callback,
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gpointer data)
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{
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GstGLWindowPrivate *priv = window->priv;
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priv->draw_cb = callback;
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priv->draw_data = data;
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}
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/* Must be called in the gl thread */
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void
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gst_gl_window_set_resize_callback (GstGLWindow * window,
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GstGLWindowCB2 callback, gpointer data)
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{
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GstGLWindowPrivate *priv = window->priv;
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priv->resize_cb = callback;
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priv->resize_data = data;
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}
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/* Must be called in the gl thread */
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void
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gst_gl_window_set_close_callback (GstGLWindow * window, GstGLWindowCB callback,
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gpointer data)
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{
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GstGLWindowPrivate *priv = window->priv;
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priv->close_cb = callback;
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priv->close_data = data;
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}
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void
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gst_gl_window_draw_unlocked (GstGLWindow * window)
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{
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gst_gl_window_draw (window);
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}
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/* Thread safe */
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void
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gst_gl_window_draw (GstGLWindow * window)
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{
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GstGLWindowPrivate *priv = window->priv;
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if (!priv->visible) {
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ShowWindowAsync (priv->internal_win_id, SW_SHOW);
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priv->visible = TRUE;
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}
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RedrawWindow (priv->internal_win_id, NULL, NULL,
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RDW_NOERASE | RDW_INTERNALPAINT | RDW_INVALIDATE);
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}
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void
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gst_gl_window_run_loop (GstGLWindow * window)
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{
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GstGLWindowPrivate *priv = window->priv;
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gboolean running = TRUE;
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gboolean bRet = FALSE;
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MSG msg;
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g_debug ("begin loop\n");
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while (running && (bRet = GetMessage (&msg, NULL, 0, 0)) != 0) {
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if (bRet == -1) {
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g_error ("Failed to get message %x\r\n", GetLastError ());
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running = FALSE;
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} else {
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TranslateMessage (&msg);
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DispatchMessage (&msg);
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}
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}
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g_debug ("end loop\n");
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}
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/* Thread safe */
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void
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gst_gl_window_quit_loop (GstGLWindow * window, GstGLWindowCB callback,
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gpointer data)
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{
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if (window) {
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GstGLWindowPrivate *priv = window->priv;
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LRESULT res = PostMessage (priv->internal_win_id, WM_GST_GL_WINDOW_QUIT,
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(WPARAM) data, (LPARAM) callback);
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g_assert (SUCCEEDED (res));
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g_debug ("end loop requested\n");
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}
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}
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/* Thread safe */
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void
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gst_gl_window_send_message (GstGLWindow * window, GstGLWindowCB callback,
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gpointer data)
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{
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if (window) {
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GstGLWindowPrivate *priv = window->priv;
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LRESULT res = SendMessage (priv->internal_win_id, WM_GST_GL_WINDOW_CUSTOM,
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(WPARAM) data, (LPARAM) callback);
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g_assert (SUCCEEDED (res));
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}
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}
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/* PRIVATE */
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void
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gst_gl_window_set_pixel_format (GstGLWindow * window)
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{
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GstGLWindowPrivate *priv = window->priv;
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PIXELFORMATDESCRIPTOR pfd;
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gint pixelformat = 0;
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gboolean res = FALSE;
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pfd.nSize = sizeof (PIXELFORMATDESCRIPTOR);
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pfd.nVersion = 1;
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pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
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pfd.iPixelType = PFD_TYPE_RGBA;
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pfd.cColorBits = 24;
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pfd.cRedBits = 0;
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pfd.cRedShift = 0;
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pfd.cGreenBits = 0;
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pfd.cGreenShift = 0;
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pfd.cBlueBits = 0;
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pfd.cBlueShift = 0;
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pfd.cAlphaBits = 0;
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pfd.cAlphaShift = 0;
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pfd.cAccumBits = 0;
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pfd.cAccumRedBits = 0;
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pfd.cAccumGreenBits = 0;
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pfd.cAccumBlueBits = 0;
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pfd.cAccumAlphaBits = 0;
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pfd.cDepthBits = 32;
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pfd.cStencilBits = 8;
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pfd.cAuxBuffers = 0;
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pfd.iLayerType = PFD_MAIN_PLANE;
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pfd.bReserved = 0;
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pfd.dwLayerMask = 0;
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pfd.dwVisibleMask = 0;
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pfd.dwDamageMask = 0;
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pfd.cColorBits = (BYTE) GetDeviceCaps (priv->device, BITSPIXEL);
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pixelformat = ChoosePixelFormat (priv->device, &pfd);
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g_assert (pixelformat);
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res = SetPixelFormat (priv->device, pixelformat, &pfd);
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g_assert (res);
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}
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LRESULT CALLBACK
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window_proc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
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{
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if (uMsg == WM_CREATE) {
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GstGLWindow *window =
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(GstGLWindow *) (((LPCREATESTRUCT) lParam)->lpCreateParams);
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g_debug ("WM_CREATE\n");
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g_assert (window);
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{
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GstGLWindowPrivate *priv = window->priv;
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priv->device = GetDC (hWnd);
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gst_gl_window_set_pixel_format (window);
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priv->gl_context = wglCreateContext (priv->device);
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if (priv->gl_context)
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g_debug ("gl context created: %d\n", priv->gl_context);
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else
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g_debug ("failed to create glcontext %d, %x\r\n", hWnd,
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GetLastError ());
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g_assert (priv->gl_context);
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ReleaseDC (hWnd, priv->device);
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if (!wglMakeCurrent (priv->device, priv->gl_context))
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g_debug ("failed to make opengl context current %d, %x\r\n", hWnd,
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GetLastError ());
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if (priv->external_gl_context) {
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if (!wglShareLists (priv->gl_context, priv->external_gl_context))
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g_debug ("failed to share opengl context %lud with %lud\n",
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priv->gl_context, priv->external_gl_context);
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else
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g_debug ("share opengl context succeed\n");
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}
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}
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SetProp (hWnd, "gl_window", window);
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return 0;
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} else if (GetProp (hWnd, "gl_window")) {
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GstGLWindow *window = GetProp (hWnd, "gl_window");
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GstGLWindowPrivate *priv = NULL;
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g_assert (window);
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priv = window->priv;
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g_assert (priv);
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g_assert (priv->internal_win_id == hWnd);
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g_assert (priv->gl_context == wglGetCurrentContext ());
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switch (uMsg) {
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case WM_SIZE:
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{
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if (priv->resize_cb)
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priv->resize_cb (priv->resize_data, LOWORD (lParam), HIWORD (lParam));
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break;
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}
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case WM_PAINT:
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{
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if (priv->draw_cb) {
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PAINTSTRUCT ps;
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BeginPaint (hWnd, &ps);
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priv->draw_cb (priv->draw_data);
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SwapBuffers (priv->device);
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EndPaint (hWnd, &ps);
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}
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break;
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}
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case WM_CLOSE:
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{
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ShowWindowAsync (priv->internal_win_id, SW_HIDE);
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if (priv->close_cb)
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priv->close_cb (priv->close_data);
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priv->draw_cb = NULL;
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priv->draw_data = NULL;
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priv->resize_cb = NULL;
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priv->resize_data = NULL;
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priv->close_cb = NULL;
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priv->close_data = NULL;
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break;
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}
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case WM_GST_GL_WINDOW_QUIT:
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{
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HWND parent_id = 0;
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GstGLWindowCB destroy_cb = (GstGLWindowCB) lParam;
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g_debug ("WM_CLOSE\n");
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destroy_cb ((gpointer) wParam);
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parent_id = GetProp (hWnd, "gl_window_parent_id");
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if (parent_id) {
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WNDPROC parent_proc = GetProp (parent_id, "gl_window_parent_proc");
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g_assert (parent_proc);
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SetWindowLongPtr (parent_id, GWL_WNDPROC,
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(LONG) (guint64) parent_proc);
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SetParent (hWnd, NULL);
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RemoveProp (parent_id, "gl_window_parent_proc");
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RemoveProp (hWnd, "gl_window_parent_id");
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}
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priv->is_closed = TRUE;
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RemoveProp (hWnd, "gl_window");
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if (!wglMakeCurrent (NULL, NULL))
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g_debug ("failed to make current %d, %x\r\n", hWnd, GetLastError ());
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if (priv->gl_context) {
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if (!wglDeleteContext (priv->gl_context))
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g_debug ("failed to destroy context %d, %x\r\n", priv->gl_context,
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GetLastError ());
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}
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if (priv->internal_win_id) {
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g_debug ("BEFORE\n");
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if (!DestroyWindow (priv->internal_win_id))
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g_debug ("failed to destroy window %d, %x\r\n", hWnd,
|
|
GetLastError ());
|
|
g_debug ("AFTER\n");
|
|
}
|
|
|
|
PostQuitMessage (0);
|
|
break;
|
|
}
|
|
|
|
case WM_CAPTURECHANGED:
|
|
{
|
|
g_debug ("WM_CAPTURECHANGED\n");
|
|
if (priv->draw_cb)
|
|
priv->draw_cb (priv->draw_data);
|
|
break;
|
|
}
|
|
|
|
case WM_GST_GL_WINDOW_CUSTOM:
|
|
{
|
|
if (!priv->is_closed) {
|
|
GstGLWindowCB custom_cb = (GstGLWindowCB) lParam;
|
|
custom_cb ((gpointer) wParam);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case WM_ERASEBKGND:
|
|
return TRUE;
|
|
|
|
default:
|
|
{
|
|
/* transmit messages to the parrent (ex: mouse/keyboard input) */
|
|
HWND parent_id = GetProp (hWnd, "gl_window_parent_id");
|
|
if (parent_id)
|
|
PostMessage (parent_id, uMsg, wParam, lParam);
|
|
return DefWindowProc (hWnd, uMsg, wParam, lParam);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
} else
|
|
return DefWindowProc (hWnd, uMsg, wParam, lParam);
|
|
}
|
|
|
|
LRESULT FAR PASCAL
|
|
sub_class_proc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
|
|
{
|
|
WNDPROC window_parent_proc = GetProp (hWnd, "gl_window_parent_proc");
|
|
|
|
if (uMsg == WM_SIZE) {
|
|
HWND gl_window_id = GetProp (hWnd, "gl_window_id");
|
|
MoveWindow (gl_window_id, 0, 0, LOWORD (lParam), HIWORD (lParam), FALSE);
|
|
}
|
|
|
|
return CallWindowProc (window_parent_proc, hWnd, uMsg, wParam, lParam);
|
|
}
|