gstreamer/gst-libs/gst/gl/gstglwindow_win32.c

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/*
* GStreamer
* Copyright (C) 2008 Julien Isorce <julien.isorce@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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#undef UNICODE
#include <windows.h>
#define UNICODE
#include "gstglwindow.h"
#define WM_GST_GL_WINDOW_CUSTOM (WM_APP+1)
#define WM_GST_GL_WINDOW_QUIT (WM_APP+2)
void gst_gl_window_set_pixel_format (GstGLWindow * window);
LRESULT CALLBACK window_proc (HWND hWnd, UINT uMsg, WPARAM wParam,
LPARAM lParam);
LRESULT FAR PASCAL sub_class_proc (HWND hWnd, UINT uMsg, WPARAM wParam,
LPARAM lParam);
#define GST_GL_WINDOW_GET_PRIVATE(o) \
(G_TYPE_INSTANCE_GET_PRIVATE((o), GST_GL_TYPE_WINDOW, GstGLWindowPrivate))
enum
{
PROP_0
};
struct _GstGLWindowPrivate
{
HWND internal_win_id;
HDC device;
HGLRC gl_context;
HGLRC external_gl_context;
GstGLWindowCB draw_cb;
gpointer draw_data;
GstGLWindowCB2 resize_cb;
gpointer resize_data;
GstGLWindowCB close_cb;
gpointer close_data;
gboolean is_closed;
gboolean visible;
};
G_DEFINE_TYPE (GstGLWindow, gst_gl_window, G_TYPE_OBJECT);
#undef G_LOG_DOMAIN
#define G_LOG_DOMAIN "GstGLWindow"
gboolean _gst_gl_window_debug = FALSE;
void
gst_gl_window_init_platform ()
{
}
HHOOK hHook;
/* Must be called in the gl thread */
static void
gst_gl_window_finalize (GObject * object)
{
G_OBJECT_CLASS (gst_gl_window_parent_class)->finalize (object);
}
static void
gst_gl_window_log_handler (const gchar * domain, GLogLevelFlags flags,
const gchar * message, gpointer user_data)
{
if (_gst_gl_window_debug) {
g_log_default_handler (domain, flags, message, user_data);
}
}
static void
gst_gl_window_class_init (GstGLWindowClass * klass)
{
GObjectClass *obj_class = G_OBJECT_CLASS (klass);
WNDCLASS wc;
ATOM atom = 0;
HINSTANCE hinstance = GetModuleHandle (NULL);
g_type_class_add_private (klass, sizeof (GstGLWindowPrivate));
obj_class->finalize = gst_gl_window_finalize;
atom = GetClassInfo (hinstance, "GSTGL", &wc);
if (atom == 0) {
ZeroMemory (&wc, sizeof (WNDCLASS));
wc.lpfnWndProc = window_proc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hinstance;
wc.hIcon = LoadIcon (NULL, IDI_WINLOGO);
wc.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
wc.hCursor = LoadCursor (NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH) GetStockObject (BLACK_BRUSH);
wc.lpszMenuName = NULL;
wc.lpszClassName = "GSTGL";
atom = RegisterClass (&wc);
if (atom == 0)
g_error ("Failed to register window class %lud\n", GetLastError ());
}
}
static void
gst_gl_window_init (GstGLWindow * window)
{
window->priv = GST_GL_WINDOW_GET_PRIVATE (window);
if (g_getenv ("GST_GL_WINDOW_DEBUG") != NULL)
_gst_gl_window_debug = TRUE;
g_log_set_handler ("GstGLWindow", G_LOG_LEVEL_DEBUG,
gst_gl_window_log_handler, NULL);
}
/* Must be called in the gl thread */
GstGLWindow *
gst_gl_window_new (guintptr external_gl_context)
{
GstGLWindow *window = g_object_new (GST_GL_TYPE_WINDOW, NULL);
GstGLWindowPrivate *priv = window->priv;
HINSTANCE hinstance = GetModuleHandle (NULL);
static gint x = 0;
static gint y = 0;
x += 20;
y += 20;
priv->internal_win_id = 0;
priv->device = 0;
priv->gl_context = 0;
priv->external_gl_context = (HGLRC) external_gl_context;
priv->draw_cb = NULL;
priv->draw_data = NULL;
priv->resize_cb = NULL;
priv->resize_data = NULL;
priv->close_cb = NULL;
priv->close_data = NULL;
priv->is_closed = FALSE;
priv->visible = FALSE;
priv->internal_win_id = CreateWindowEx (0,
"GSTGL",
"OpenGL renderer",
WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW,
x, y, 0, 0, (HWND) NULL, (HMENU) NULL, hinstance, window);
if (!priv->internal_win_id) {
g_debug ("failed to create gl window\n");
goto failure;
}
g_debug ("gl window created: %" G_GUINTPTR_FORMAT "\n",
(guintptr) priv->internal_win_id);
//device is set in the window_proc
if (!priv->device) {
g_debug ("failed to create device\n");
goto failure;
}
ShowCursor (TRUE);
return window;
failure:
g_object_unref (G_OBJECT (window));
return NULL;
}
GQuark
gst_gl_window_error_quark (void)
{
return g_quark_from_static_string ("gst-gl-window-error");
}
guintptr
gst_gl_window_get_internal_gl_context (GstGLWindow * window)
{
GstGLWindowPrivate *priv = window->priv;
return (guintptr) priv->gl_context;
}
void
callback_activate_gl_context (GstGLWindowPrivate * priv)
{
if (!wglMakeCurrent (priv->device, priv->gl_context))
g_debug ("failed to activate opengl context %lud\n", GetLastError ());
}
void
callback_inactivate_gl_context (GstGLWindowPrivate * priv)
{
if (!wglMakeCurrent (NULL, NULL))
g_debug ("failed to inactivate opengl context %lud\n", GetLastError ());
}
void
gst_gl_window_activate_gl_context (GstGLWindow * window, gboolean activate)
{
GstGLWindowPrivate *priv = window->priv;
if (activate)
gst_gl_window_send_message (window,
GST_GL_WINDOW_CB (callback_activate_gl_context), priv);
else
gst_gl_window_send_message (window,
GST_GL_WINDOW_CB (callback_inactivate_gl_context), priv);
}
void
gst_gl_window_set_external_window_id (GstGLWindow * window, guintptr id)
{
GstGLWindowPrivate *priv = window->priv;
//retrieve parent if previously set
HWND parent_id = GetProp (priv->internal_win_id, "gl_window_parent_id");
if (priv->visible) {
ShowWindow (priv->internal_win_id, SW_HIDE);
priv->visible = FALSE;
}
if (parent_id) {
WNDPROC parent_proc = GetProp (parent_id, "gl_window_parent_proc");
g_debug ("release parent %" G_GUINTPTR_FORMAT "\n", (guintptr) parent_id);
g_return_if_fail (parent_proc);
SetWindowLongPtr (parent_id, GWLP_WNDPROC, (LONG_PTR) parent_proc);
SetParent (priv->internal_win_id, NULL);
RemoveProp (parent_id, "gl_window_parent_proc");
RemoveProp (priv->internal_win_id, "gl_window_parent_id");
}
//not 0
if (id) {
WNDPROC window_parent_proc =
(WNDPROC) GetWindowLongPtr ((HWND) id, GWLP_WNDPROC);
RECT rect;
g_debug ("set parent %" G_GUINTPTR_FORMAT "\n", id);
SetProp (priv->internal_win_id, "gl_window_parent_id", (HWND) id);
SetProp ((HWND) id, "gl_window_id", priv->internal_win_id);
SetProp ((HWND) id, "gl_window_parent_proc", (WNDPROC) window_parent_proc);
SetWindowLongPtr ((HWND) id, GWLP_WNDPROC, (LONG_PTR) sub_class_proc);
SetWindowLongPtr (priv->internal_win_id, GWL_STYLE, WS_CHILD | WS_MAXIMIZE);
SetParent (priv->internal_win_id, (HWND) id);
//take changes into account: SWP_FRAMECHANGED
GetClientRect ((HWND) id, &rect);
SetWindowPos (priv->internal_win_id, HWND_TOP, rect.left, rect.top,
rect.right, rect.bottom,
SWP_ASYNCWINDOWPOS | SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER |
SWP_FRAMECHANGED | SWP_NOACTIVATE);
MoveWindow (priv->internal_win_id, rect.left, rect.top, rect.right,
rect.bottom, FALSE);
} else {
//no parent so the internal window needs borders and system menu
SetWindowLongPtr (priv->internal_win_id, GWL_STYLE,
WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW);
}
}
/* Must be called in the gl thread */
void
gst_gl_window_set_draw_callback (GstGLWindow * window, GstGLWindowCB callback,
gpointer data)
{
GstGLWindowPrivate *priv = window->priv;
priv->draw_cb = callback;
priv->draw_data = data;
}
/* Must be called in the gl thread */
void
gst_gl_window_set_resize_callback (GstGLWindow * window,
GstGLWindowCB2 callback, gpointer data)
{
GstGLWindowPrivate *priv = window->priv;
priv->resize_cb = callback;
priv->resize_data = data;
}
/* Must be called in the gl thread */
void
gst_gl_window_set_close_callback (GstGLWindow * window, GstGLWindowCB callback,
gpointer data)
{
GstGLWindowPrivate *priv = window->priv;
priv->close_cb = callback;
priv->close_data = data;
}
void
gst_gl_window_draw_unlocked (GstGLWindow * window, gint width, gint height)
{
gst_gl_window_draw (window, width, height);
}
/* Thread safe */
void
gst_gl_window_draw (GstGLWindow * window, gint width, gint height)
{
GstGLWindowPrivate *priv = window->priv;
if (!priv->visible) {
HWND parent_id = GetProp (priv->internal_win_id, "gl_window_parent_id");
/* if no parent the real size has to be set now because this has not been done
* when at window creation */
if (!parent_id) {
RECT rect;
GetClientRect (priv->internal_win_id, &rect);
width += 2 * GetSystemMetrics (SM_CXSIZEFRAME);
height +=
2 * GetSystemMetrics (SM_CYSIZEFRAME) +
GetSystemMetrics (SM_CYCAPTION);
MoveWindow (priv->internal_win_id, rect.left, rect.top, width, height,
FALSE);
}
ShowWindowAsync (priv->internal_win_id, SW_SHOW);
priv->visible = TRUE;
}
RedrawWindow (priv->internal_win_id, NULL, NULL,
RDW_NOERASE | RDW_INTERNALPAINT | RDW_INVALIDATE);
}
void
gst_gl_window_run_loop (GstGLWindow * window)
{
gboolean running = TRUE;
gboolean bRet = FALSE;
MSG msg;
g_debug ("begin loop\n");
while (running && (bRet = GetMessage (&msg, NULL, 0, 0)) != 0) {
if (bRet == -1) {
g_error ("Failed to get message %lud\n", GetLastError ());
running = FALSE;
} else {
TranslateMessage (&msg);
DispatchMessage (&msg);
}
}
g_debug ("end loop\n");
}
/* Thread safe */
void
gst_gl_window_quit_loop (GstGLWindow * window, GstGLWindowCB callback,
gpointer data)
{
if (window) {
GstGLWindowPrivate *priv = window->priv;
LRESULT res = PostMessage (priv->internal_win_id, WM_GST_GL_WINDOW_QUIT,
(WPARAM) data, (LPARAM) callback);
g_return_if_fail (SUCCEEDED (res));
g_debug ("end loop requested\n");
}
}
/* Thread safe */
void
gst_gl_window_send_message (GstGLWindow * window, GstGLWindowCB callback,
gpointer data)
{
if (window) {
GstGLWindowPrivate *priv = window->priv;
LRESULT res = SendMessage (priv->internal_win_id, WM_GST_GL_WINDOW_CUSTOM,
(WPARAM) data, (LPARAM) callback);
g_return_if_fail (SUCCEEDED (res));
}
}
/* PRIVATE */
void
gst_gl_window_set_pixel_format (GstGLWindow * window)
{
GstGLWindowPrivate *priv = window->priv;
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 (priv->device, BITSPIXEL);
pixelformat = ChoosePixelFormat (priv->device, &pfd);
g_return_if_fail (pixelformat);
res = SetPixelFormat (priv->device, pixelformat, &pfd);
g_return_if_fail (res);
}
LRESULT CALLBACK
window_proc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
if (uMsg == WM_CREATE) {
GstGLWindow *window =
(GstGLWindow *) (((LPCREATESTRUCT) lParam)->lpCreateParams);
g_debug ("WM_CREATE\n");
g_assert (window);
{
GstGLWindowPrivate *priv = window->priv;
priv->device = GetDC (hWnd);
gst_gl_window_set_pixel_format (window);
priv->gl_context = wglCreateContext (priv->device);
if (priv->gl_context)
g_debug ("gl context created: %" G_GUINTPTR_FORMAT "\n",
(guintptr) priv->gl_context);
else
g_debug ("failed to create glcontext %" G_GUINTPTR_FORMAT ", %lud\n",
(guintptr) hWnd, GetLastError ());
g_assert (priv->gl_context);
ReleaseDC (hWnd, priv->device);
if (!wglMakeCurrent (priv->device, priv->gl_context))
g_debug ("failed to make opengl context current %" G_GUINTPTR_FORMAT
", %lud\n", (guintptr) hWnd, GetLastError ());
if (priv->external_gl_context) {
if (!wglShareLists (priv->external_gl_context, priv->gl_context))
g_debug ("failed to share opengl context %" G_GUINTPTR_FORMAT
" with %" G_GUINTPTR_FORMAT "\n", (guintptr) priv->gl_context,
(guintptr) priv->external_gl_context);
else
g_debug ("share opengl context succeed %" G_GUINTPTR_FORMAT "\n",
(guintptr) priv->external_gl_context);
}
}
SetProp (hWnd, "gl_window", window);
return 0;
} else if (GetProp (hWnd, "gl_window")) {
GstGLWindow *window = GetProp (hWnd, "gl_window");
GstGLWindowPrivate *priv = NULL;
g_assert (window);
priv = window->priv;
g_assert (priv);
g_assert (priv->internal_win_id == hWnd);
g_assert (!wglGetCurrentContext ()
|| priv->gl_context == wglGetCurrentContext ());
switch (uMsg) {
case WM_SIZE:
{
if (priv->resize_cb) {
priv->resize_cb (priv->resize_data, LOWORD (lParam), HIWORD (lParam));
}
break;
}
case WM_PAINT:
{
if (priv->draw_cb) {
PAINTSTRUCT ps;
BeginPaint (hWnd, &ps);
priv->draw_cb (priv->draw_data);
SwapBuffers (priv->device);
EndPaint (hWnd, &ps);
}
break;
}
case WM_CLOSE:
{
ShowWindowAsync (priv->internal_win_id, SW_HIDE);
if (priv->close_cb)
priv->close_cb (priv->close_data);
priv->draw_cb = NULL;
priv->draw_data = NULL;
priv->resize_cb = NULL;
priv->resize_data = NULL;
priv->close_cb = NULL;
priv->close_data = NULL;
break;
}
case WM_GST_GL_WINDOW_QUIT:
{
HWND parent_id = 0;
GstGLWindowCB destroy_cb = (GstGLWindowCB) lParam;
g_debug ("WM_CLOSE\n");
destroy_cb ((gpointer) wParam);
parent_id = GetProp (hWnd, "gl_window_parent_id");
if (parent_id) {
WNDPROC parent_proc = GetProp (parent_id, "gl_window_parent_proc");
g_assert (parent_proc);
SetWindowLongPtr (parent_id, GWLP_WNDPROC, (LONG_PTR) parent_proc);
SetParent (hWnd, NULL);
RemoveProp (parent_id, "gl_window_parent_proc");
RemoveProp (hWnd, "gl_window_parent_id");
}
priv->is_closed = TRUE;
RemoveProp (hWnd, "gl_window");
if (!wglMakeCurrent (NULL, NULL))
g_debug ("failed to make current %" G_GUINTPTR_FORMAT ", %lud\n",
(guintptr) hWnd, GetLastError ());
if (priv->gl_context) {
if (!wglDeleteContext (priv->gl_context))
g_debug ("failed to destroy context %" G_GUINTPTR_FORMAT ", %lud\n",
(guintptr) priv->gl_context, GetLastError ());
}
if (priv->internal_win_id) {
if (!DestroyWindow (priv->internal_win_id))
g_debug ("failed to destroy window %" G_GUINTPTR_FORMAT ", %lud\n",
(guintptr) hWnd, GetLastError ());
}
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);
}