gstreamer/subprojects/gst-plugins-base/gst-libs/gst/gl/win32/gstglwindow_win32.c

692 lines
19 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstglwindow_win32.h"
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);
enum
{
PROP_0
};
struct _GstGLWindowWin32Private
{
gint preferred_width;
gint preferred_height;
GIOChannel *msg_io_channel;
};
#define GST_CAT_DEFAULT gst_gl_window_win32_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
#define DEBUG_INIT \
GST_DEBUG_CATEGORY_GET (GST_CAT_DEFAULT, "glwindow");
#define gst_gl_window_win32_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstGLWindowWin32, gst_gl_window_win32,
GST_TYPE_GL_WINDOW, G_ADD_PRIVATE (GstGLWindowWin32) DEBUG_INIT);
static void gst_gl_window_win32_set_window_handle (GstGLWindow * window,
guintptr handle);
static guintptr gst_gl_window_win32_get_display (GstGLWindow * window);
static guintptr gst_gl_window_win32_get_window_handle (GstGLWindow * window);
static void gst_gl_window_win32_set_preferred_size (GstGLWindow * window,
gint width, gint height);
static void gst_gl_window_win32_show (GstGLWindow * window);
static void gst_gl_window_win32_draw (GstGLWindow * window);
gboolean gst_gl_window_win32_open (GstGLWindow * window, GError ** error);
void gst_gl_window_win32_close (GstGLWindow * window);
static void release_parent_win_id (GstGLWindowWin32 * window_win32);
static void gst_gl_window_win32_send_message (GstGLWindow * window,
GstGLWindowCB callback, gpointer data);
static void
gst_gl_window_win32_class_init (GstGLWindowWin32Class * klass)
{
GstGLWindowClass *window_class = (GstGLWindowClass *) klass;
window_class->set_window_handle =
GST_DEBUG_FUNCPTR (gst_gl_window_win32_set_window_handle);
window_class->draw = GST_DEBUG_FUNCPTR (gst_gl_window_win32_draw);
window_class->get_display =
GST_DEBUG_FUNCPTR (gst_gl_window_win32_get_display);
window_class->get_window_handle =
GST_DEBUG_FUNCPTR (gst_gl_window_win32_get_window_handle);
window_class->set_preferred_size =
GST_DEBUG_FUNCPTR (gst_gl_window_win32_set_preferred_size);
window_class->show = GST_DEBUG_FUNCPTR (gst_gl_window_win32_show);
window_class->open = GST_DEBUG_FUNCPTR (gst_gl_window_win32_open);
window_class->close = GST_DEBUG_FUNCPTR (gst_gl_window_win32_close);
window_class->send_message =
GST_DEBUG_FUNCPTR (gst_gl_window_win32_send_message);
}
static void
gst_gl_window_win32_init (GstGLWindowWin32 * window)
{
window->priv = gst_gl_window_win32_get_instance_private (window);
}
GstGLWindowWin32 *
gst_gl_window_win32_new (GstGLDisplay * display)
{
GstGLWindowWin32 *window;
if ((gst_gl_display_get_handle_type (display) &
(GST_GL_DISPLAY_TYPE_WIN32 | GST_GL_DISPLAY_TYPE_EGL)) == 0)
/* we require an win32 display to create win32 windows */
return NULL;
window = g_object_new (GST_TYPE_GL_WINDOW_WIN32, NULL);
gst_object_ref_sink (window);
return window;
}
static gboolean
msg_cb (GIOChannel * source, GIOCondition condition, gpointer data)
{
MSG msg;
if (!PeekMessage (&msg, NULL, 0, 0, PM_REMOVE))
return G_SOURCE_CONTINUE;
GST_TRACE ("handle message");
TranslateMessage (&msg);
DispatchMessage (&msg);
return G_SOURCE_CONTINUE;
}
gboolean
gst_gl_window_win32_open (GstGLWindow * window, GError ** error)
{
GstGLWindowWin32 *window_win32 = GST_GL_WINDOW_WIN32 (window);
if (!GST_GL_WINDOW_CLASS (parent_class)->open (window, error))
return FALSE;
window_win32->priv->msg_io_channel = g_io_channel_win32_new_messages (0);
window_win32->msg_source =
g_io_create_watch (window_win32->priv->msg_io_channel, G_IO_IN);
g_source_set_callback (window_win32->msg_source, (GSourceFunc) msg_cb, NULL,
NULL);
g_source_attach (window_win32->msg_source, window->main_context);
return TRUE;
}
void
gst_gl_window_win32_close (GstGLWindow * window)
{
GstGLWindowWin32 *window_win32 = GST_GL_WINDOW_WIN32 (window);
release_parent_win_id (window_win32);
if (window_win32->internal_win_id) {
RemoveProp (window_win32->internal_win_id, "gl_window");
ShowWindow (window_win32->internal_win_id, SW_HIDE);
SetParent (window_win32->internal_win_id, NULL);
if (!DestroyWindow (window_win32->internal_win_id))
GST_WARNING ("failed to destroy window %" G_GUINTPTR_FORMAT
", 0x%x", (guintptr) window_win32->internal_win_id,
(unsigned int) GetLastError ());
}
g_source_destroy (window_win32->msg_source);
g_source_unref (window_win32->msg_source);
window_win32->msg_source = NULL;
g_io_channel_unref (window_win32->priv->msg_io_channel);
window_win32->priv->msg_io_channel = NULL;
GST_GL_WINDOW_CLASS (parent_class)->close (window);
}
static void
set_parent_win_id (GstGLWindowWin32 * window_win32)
{
WNDPROC window_parent_proc;
RECT rect;
if (!window_win32->parent_win_id) {
/* no parent so the internal window needs borders and system menu */
SetWindowLongPtr (window_win32->internal_win_id, GWL_STYLE,
WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW);
SetParent (window_win32->internal_win_id, NULL);
return;
}
window_parent_proc =
(WNDPROC) GetWindowLongPtr (window_win32->parent_win_id, GWLP_WNDPROC);
GST_DEBUG ("set parent %" G_GUINTPTR_FORMAT,
(guintptr) window_win32->parent_win_id);
SetProp (window_win32->parent_win_id, "gl_window_id",
window_win32->internal_win_id);
SetProp (window_win32->parent_win_id, "gl_window_parent_proc",
(WNDPROC) window_parent_proc);
SetWindowLongPtr (window_win32->parent_win_id, GWLP_WNDPROC,
(LONG_PTR) sub_class_proc);
SetWindowLongPtr (window_win32->internal_win_id, GWL_STYLE,
WS_CHILD | WS_MAXIMIZE);
SetParent (window_win32->internal_win_id, window_win32->parent_win_id);
/* take changes into account: SWP_FRAMECHANGED */
GetClientRect (window_win32->parent_win_id, &rect);
SetWindowPos (window_win32->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 (window_win32->internal_win_id, rect.left, rect.top, rect.right,
rect.bottom, FALSE);
}
static void
release_parent_win_id (GstGLWindowWin32 * window_win32)
{
WNDPROC parent_proc;
if (!window_win32->parent_win_id)
return;
parent_proc = GetProp (window_win32->parent_win_id, "gl_window_parent_proc");
if (!parent_proc)
return;
GST_DEBUG ("release parent %" G_GUINTPTR_FORMAT,
(guintptr) window_win32->parent_win_id);
SetWindowLongPtr (window_win32->parent_win_id, GWLP_WNDPROC,
(LONG_PTR) parent_proc);
RemoveProp (window_win32->parent_win_id, "gl_window_parent_proc");
}
gboolean
gst_gl_window_win32_create_window (GstGLWindowWin32 * window_win32,
GError ** error)
{
// GstGLWindowWin32 *window_win32 = GST_GL_WINDOW_WIN32 (window);
WNDCLASSEX wc;
ATOM atom = 0;
HINSTANCE hinstance = GetModuleHandle (NULL);
static gint x = 0;
static gint y = 0;
GST_LOG ("Attempting to create a win32 window");
x += 20;
y += 20;
atom = GetClassInfoEx (hinstance, "GSTGL", &wc);
if (atom == 0) {
ZeroMemory (&wc, sizeof (WNDCLASSEX));
wc.cbSize = sizeof (WNDCLASSEX);
wc.lpfnWndProc = window_proc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hinstance;
wc.hIcon = LoadIcon (NULL, IDI_WINLOGO);
wc.hIconSm = NULL;
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 = RegisterClassEx (&wc);
if (atom == 0) {
g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_FAILED,
"Failed to register window class 0x%x\n",
(unsigned int) GetLastError ());
goto failure;
}
}
window_win32->internal_win_id = 0;
window_win32->device = 0;
window_win32->visible = FALSE;
window_win32->internal_win_id = CreateWindowEx (0,
"GSTGL",
"OpenGL renderer",
WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_OVERLAPPEDWINDOW,
x, y, 0, 0, (HWND) NULL, (HMENU) NULL, hinstance, window_win32);
if (!window_win32->internal_win_id) {
g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_FAILED,
"failed to create gl window");
goto failure;
}
GST_DEBUG ("gl window created: %" G_GUINTPTR_FORMAT,
(guintptr) window_win32->internal_win_id);
//device is set in the window_proc
if (!window_win32->device) {
g_set_error (error, GST_GL_CONTEXT_ERROR, GST_GL_CONTEXT_ERROR_FAILED,
"failed to create device");
goto failure;
}
ShowCursor (TRUE);
GST_LOG ("Created a win32 window");
/* The window has been created as if it had no parent, so there is nothing
* else to do in that case. Even if user has already set a window,
* parent_win_id could still be 0 at this point, and in that case calling
* set_parent_win_id() here would steal focus from the parent window. */
if (window_win32->parent_win_id)
set_parent_win_id (window_win32);
return TRUE;
failure:
return FALSE;
}
static guintptr
gst_gl_window_win32_get_display (GstGLWindow * window)
{
GstGLWindowWin32 *window_win32;
window_win32 = GST_GL_WINDOW_WIN32 (window);
return (guintptr) window_win32->device;
}
static guintptr
gst_gl_window_win32_get_window_handle (GstGLWindow * window)
{
GstGLWindowWin32 *window_win32;
window_win32 = GST_GL_WINDOW_WIN32 (window);
return (guintptr) window_win32->internal_win_id;
}
static void
gst_gl_window_win32_set_window_handle (GstGLWindow * window, guintptr id)
{
GstGLWindowWin32 *window_win32;
window_win32 = GST_GL_WINDOW_WIN32 (window);
if (!window_win32->internal_win_id) {
window_win32->parent_win_id = (HWND) id;
return;
}
if (window_win32->visible) {
ShowWindow (window_win32->internal_win_id, SW_HIDE);
window_win32->visible = FALSE;
}
release_parent_win_id (window_win32);
window_win32->parent_win_id = (HWND) id;
set_parent_win_id (window_win32);
}
static void
gst_gl_window_win32_show (GstGLWindow * window)
{
GstGLWindowWin32 *window_win32 = GST_GL_WINDOW_WIN32 (window);
gint width = window_win32->priv->preferred_width;
gint height = window_win32->priv->preferred_height;
if (!window_win32->visible) {
HWND parent_id = window_win32->parent_win_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 (window_win32->internal_win_id, &rect);
width += 2 * GetSystemMetrics (SM_CXSIZEFRAME);
height +=
2 * GetSystemMetrics (SM_CYSIZEFRAME) +
GetSystemMetrics (SM_CYCAPTION);
MoveWindow (window_win32->internal_win_id, rect.left, rect.top, width,
height, FALSE);
}
ShowWindowAsync (window_win32->internal_win_id, SW_SHOW);
window_win32->visible = TRUE;
}
}
static void
gst_gl_window_win32_set_preferred_size (GstGLWindow * window, gint width,
gint height)
{
GstGLWindowWin32 *window_win32 = GST_GL_WINDOW_WIN32 (window);
window_win32->priv->preferred_width = width;
window_win32->priv->preferred_height = height;
}
/* Thread safe */
static void
gst_gl_window_win32_draw (GstGLWindow * window)
{
GstGLWindowWin32 *window_win32 = GST_GL_WINDOW_WIN32 (window);
RedrawWindow (window_win32->internal_win_id, NULL, NULL,
RDW_NOERASE | RDW_INTERNALPAINT | RDW_INVALIDATE);
}
typedef struct
{
GstGLWindow *window;
const gchar *event_type;
gchar *key_string;
} GstGLWindowWin32KeyEvent;
static gboolean
gst_gl_window_win32_handle_key_event_func (GstGLWindowWin32KeyEvent * event)
{
gst_gl_window_send_key_event (event->window,
event->event_type, event->key_string);
return G_SOURCE_REMOVE;
}
static void
gst_gl_window_win32_key_event_free (GstGLWindowWin32KeyEvent * event)
{
g_free (event->key_string);
g_free (event);
}
static void
gst_gl_window_win32_handle_key_event (GstGLWindow * window, UINT uMsg,
LPARAM lParam)
{
gunichar2 wcrep[128];
if (GetKeyNameTextW (lParam, (LPWSTR) wcrep, 128)) {
gchar *utfrep = g_utf16_to_utf8 (wcrep, 128, NULL, NULL, NULL);
if (utfrep) {
GstGLDisplay *display = window->display;
GstGLWindowWin32KeyEvent *key_event;
key_event = g_new0 (GstGLWindowWin32KeyEvent, 1);
key_event->window = window;
if (uMsg == WM_KEYDOWN)
key_event->event_type = "key-press";
else
key_event->event_type = "key-release";
key_event->key_string = utfrep;
g_main_context_invoke_full (display->main_context, G_PRIORITY_DEFAULT,
(GSourceFunc) gst_gl_window_win32_handle_key_event_func,
key_event, (GDestroyNotify) gst_gl_window_win32_key_event_free);
}
}
}
typedef struct
{
GstGLWindow *window;
const gchar *event_type;
gint button;
gdouble pos_x;
gdouble pos_y;
} GstGLWindowWin32MouseEvent;
static gboolean
gst_gl_window_win32_handle_mouse_event_func (GstGLWindowWin32MouseEvent * event)
{
gst_gl_window_send_mouse_event (event->window,
event->event_type, event->button, event->pos_x, event->pos_y);
return G_SOURCE_REMOVE;
}
static void
gst_gl_window_win32_handle_mouse_event (GstGLWindow * window, UINT uMsg,
LPARAM lParam)
{
gint button;
const gchar *event = NULL;
switch (uMsg) {
case WM_MOUSEMOVE:
button = 0;
event = "mouse-move";
break;
case WM_LBUTTONDOWN:
button = 1;
event = "mouse-button-press";
break;
case WM_LBUTTONUP:
button = 1;
event = "mouse-button-release";
break;
case WM_RBUTTONDOWN:
button = 2;
event = "mouse-button-press";
break;
case WM_RBUTTONUP:
button = 2;
event = "mouse-button-release";
break;
case WM_MBUTTONDOWN:
button = 3;
event = "mouse-button-press";
break;
case WM_MBUTTONUP:
button = 3;
event = "mouse-button-release";
break;
default:
break;
}
if (event) {
GstGLDisplay *display = window->display;
GstGLWindowWin32MouseEvent *mouse_event;
mouse_event = g_new0 (GstGLWindowWin32MouseEvent, 1);
mouse_event->window = window;
mouse_event->event_type = event;
mouse_event->button = button;
mouse_event->pos_x = (gdouble) LOWORD (lParam);
mouse_event->pos_y = (gdouble) HIWORD (lParam);
g_main_context_invoke_full (display->main_context, G_PRIORITY_DEFAULT,
(GSourceFunc) gst_gl_window_win32_handle_mouse_event_func,
mouse_event, (GDestroyNotify) g_free);
}
}
/* PRIVATE */
LRESULT CALLBACK
window_proc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
GstGLWindowWin32 *window_win32;
LRESULT ret = 0;
if (uMsg == WM_CREATE) {
window_win32 =
GST_GL_WINDOW_WIN32 (((LPCREATESTRUCT) lParam)->lpCreateParams);
GST_TRACE ("WM_CREATE");
window_win32->device = GetDC (hWnd);
/* Do this, otherwise we hang on exit. We can still use it (due to the
* CS_OWNDC flag in the WindowClass) after we have Released.
*/
ReleaseDC (hWnd, window_win32->device);
SetProp (hWnd, "gl_window", window_win32);
} else if (GetProp (hWnd, "gl_window")) {
GstGLWindow *window;
GstGLContext *context;
window_win32 = GST_GL_WINDOW_WIN32 (GetProp (hWnd, "gl_window"));
window = GST_GL_WINDOW (window_win32);
context = gst_gl_window_get_context (window);
g_assert (window_win32->internal_win_id == hWnd);
switch (uMsg) {
case WM_SIZE:
gst_gl_window_resize (window, LOWORD (lParam), HIWORD (lParam));
break;
case WM_PAINT:
{
if (window->queue_resize) {
guint width, height;
gst_gl_window_get_surface_dimensions (window, &width, &height);
gst_gl_window_resize (window, width, height);
}
if (window->draw) {
PAINTSTRUCT ps;
BeginPaint (hWnd, &ps);
window->draw (window->draw_data);
gst_gl_context_swap_buffers (context);
EndPaint (hWnd, &ps);
}
break;
}
case WM_CLOSE:
{
ShowWindowAsync (window_win32->internal_win_id, SW_HIDE);
GST_TRACE ("WM_CLOSE");
if (window->close)
window->close (window->close_data);
break;
}
case WM_CAPTURECHANGED:
{
GST_DEBUG ("WM_CAPTURECHANGED");
if (window->queue_resize) {
guint width, height;
gst_gl_window_get_surface_dimensions (window, &width, &height);
gst_gl_window_resize (window, width, height);
}
if (window->draw)
window->draw (window->draw_data);
break;
}
case WM_ERASEBKGND:
{
ret = TRUE;
break;
}
case WM_KEYDOWN:
case WM_KEYUP:
gst_gl_window_win32_handle_key_event (window, uMsg, lParam);
ret = DefWindowProc (hWnd, uMsg, wParam, lParam);
break;
case WM_LBUTTONDOWN:
case WM_LBUTTONUP:
case WM_RBUTTONDOWN:
case WM_RBUTTONUP:
case WM_MBUTTONDOWN:
case WM_MBUTTONUP:
case WM_MOUSEMOVE:
gst_gl_window_win32_handle_mouse_event (window, uMsg, lParam);
/* DefWindowProc will not chain up mouse event to parent window */
if (window_win32->parent_win_id)
PostMessage (window_win32->parent_win_id, uMsg, wParam, lParam);
ret = DefWindowProc (hWnd, uMsg, wParam, lParam);
break;
default:
{
ret = DefWindowProc (hWnd, uMsg, wParam, lParam);
}
}
gst_object_unref (context);
} else {
ret = DefWindowProc (hWnd, uMsg, wParam, lParam);
}
return ret;
}
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);
}
typedef struct _GstGLWin32SyncMessage
{
GstGLWindowCB callback;
gpointer data;
HANDLE *event;
} GstGLWin32SyncMessage;
static void
_run_message_sync (GstGLWin32SyncMessage * message)
{
if (message->callback)
message->callback (message->data);
SetEvent (message->event);
}
void
gst_gl_window_win32_send_message (GstGLWindow * window,
GstGLWindowCB callback, gpointer data)
{
GstGLWin32SyncMessage message;
message.callback = callback;
message.data = data;
message.event = CreateEvent (NULL, FALSE, FALSE, NULL);
gst_gl_window_send_message_async (window, (GstGLWindowCB) _run_message_sync,
&message, NULL);
WaitForSingleObject (message.event, INFINITE);
CloseHandle (message.event);
}