gstreamer/gst-libs/gst/gl/win32/gstglwindow_win32.c
Matthew Waters f58eb98440 gl/window: remove use of main_context_push/pop_thread_default()
No-one's using/depending on it (it would have criticalled and not worked)
and it's causing more problems than it's solving.  Store the GMainContext
in the public struct instead for subclasses to optionally use instead of
relying on the push/pop state to be correct.

https://bugzilla.gnome.org/show_bug.cgi?id=775970
2016-12-16 00:02:47 +11:00

493 lines
14 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"
#include "win32_message_source.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);
#define GST_GL_WINDOW_WIN32_GET_PRIVATE(o) \
(G_TYPE_INSTANCE_GET_PRIVATE((o), GST_TYPE_GL_WINDOW_WIN32, GstGLWindowWin32Private))
enum
{
PROP_0
};
struct _GstGLWindowWin32Private
{
gint preferred_width;
gint preferred_height;
};
#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, 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 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_class_init (GstGLWindowWin32Class * klass)
{
GstGLWindowClass *window_class = (GstGLWindowClass *) klass;
g_type_class_add_private (klass, sizeof (GstGLWindowWin32Private));
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->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);
}
static void
gst_gl_window_win32_init (GstGLWindowWin32 * window)
{
window->priv = GST_GL_WINDOW_WIN32_GET_PRIVATE (window);
}
GstGLWindowWin32 *
gst_gl_window_win32_new (GstGLDisplay * display)
{
if ((gst_gl_display_get_handle_type (display) & GST_GL_DISPLAY_TYPE_WIN32) ==
0)
/* we require an win32 display to create win32 windows */
return NULL;
return g_object_new (GST_TYPE_GL_WINDOW_WIN32, NULL);
}
static void
msg_cb (GstGLWindowWin32 * window_win32, MSG * msg, gpointer user_data)
{
GST_TRACE ("handle message");
TranslateMessage (msg);
DispatchMessage (msg);
}
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->msg_source = win32_message_source_new (window_win32);
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;
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 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);
}
/* 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;
GstGLContextClass *context_class;
window_win32 = GST_GL_WINDOW_WIN32 (GetProp (hWnd, "gl_window"));
window = GST_GL_WINDOW (window_win32);
context = gst_gl_window_get_context (window);
context_class = GST_GL_CONTEXT_GET_CLASS (context);
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);
context_class->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;
}
default:
{
/* transmit messages to the parrent (ex: mouse/keyboard input) */
HWND parent_id = window_win32->parent_win_id;
if (parent_id)
PostMessage (parent_id, uMsg, wParam, lParam);
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);
}