gstreamer/gst-libs/gst/gl/win32/gstglwindow_win32.c
Matthew Waters 019367c128 glwindow: remove width/height from _draw()
Depending on the platform, it was only ever implemented to 1) set a
default surface size, 2) resize based on the video frame or 3) nothing.
Instead, provide a set_preferred_size () that elements/applications
can use to request a certain size which may be ignored for
videooverlay/other cases.
2017-12-09 19:31:53 +00:00

547 lines
15 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"
#define WM_GST_GL_WINDOW_CUSTOM (WM_APP+1)
#define WM_GST_GL_WINDOW_QUIT (WM_APP+2)
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_GL_TYPE_WINDOW_WIN32, GstGLWindowWin32Private))
enum
{
PROP_0
};
struct _GstGLWindowWin32Private
{
GThread *thread;
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_GL_TYPE_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_draw (GstGLWindow * window);
static void gst_gl_window_win32_run (GstGLWindow * window);
static void gst_gl_window_win32_quit (GstGLWindow * window);
static void gst_gl_window_win32_send_message_async (GstGLWindow * window,
GstGLWindowCB callback, gpointer data, GDestroyNotify destroy);
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_unlocked = GST_DEBUG_FUNCPTR (gst_gl_window_win32_draw);
window_class->draw = GST_DEBUG_FUNCPTR (gst_gl_window_win32_draw);
window_class->run = GST_DEBUG_FUNCPTR (gst_gl_window_win32_run);
window_class->quit = GST_DEBUG_FUNCPTR (gst_gl_window_win32_quit);
window_class->send_message_async =
GST_DEBUG_FUNCPTR (gst_gl_window_win32_send_message_async);
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);
}
static void
gst_gl_window_win32_init (GstGLWindowWin32 * window)
{
window->priv = GST_GL_WINDOW_WIN32_GET_PRIVATE (window);
window->priv->thread = NULL;
}
/* Must be called in the gl thread */
GstGLWindowWin32 *
gst_gl_window_win32_new (void)
{
GstGLWindowWin32 *window = g_object_new (GST_GL_TYPE_WINDOW_WIN32, NULL);
return window;
}
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->is_closed = FALSE;
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");
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;
HWND parent_id;
window_win32 = GST_GL_WINDOW_WIN32 (window);
if (!window_win32->internal_win_id) {
window_win32->parent_win_id = (HWND) id;
return;
}
/* retrieve parent if previously set */
parent_id = window_win32->parent_win_id;
if (window_win32->visible) {
ShowWindow (window_win32->internal_win_id, SW_HIDE);
window_win32->visible = FALSE;
}
if (parent_id) {
WNDPROC parent_proc = GetProp (parent_id, "gl_window_parent_proc");
GST_DEBUG ("release parent %" G_GUINTPTR_FORMAT, (guintptr) parent_id);
g_return_if_fail (parent_proc);
SetWindowLongPtr (parent_id, GWLP_WNDPROC, (LONG_PTR) parent_proc);
SetParent (window_win32->internal_win_id, NULL);
RemoveProp (parent_id, "gl_window_parent_proc");
}
//not 0
if (id) {
WNDPROC window_parent_proc =
(WNDPROC) GetWindowLongPtr ((HWND) id, GWLP_WNDPROC);
RECT rect;
GST_DEBUG ("set parent %" G_GUINTPTR_FORMAT, id);
SetProp ((HWND) id, "gl_window_id", window_win32->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 (window_win32->internal_win_id, GWL_STYLE,
WS_CHILD | WS_MAXIMIZE);
SetParent (window_win32->internal_win_id, (HWND) id);
/* take changes into account: SWP_FRAMECHANGED */
GetClientRect ((HWND) 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);
} else {
/* 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);
}
window_win32->parent_win_id = (HWND) id;
}
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);
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;
}
RedrawWindow (window_win32->internal_win_id, NULL, NULL,
RDW_NOERASE | RDW_INTERNALPAINT | RDW_INVALIDATE);
}
static void
gst_gl_window_win32_run (GstGLWindow * window)
{
GstGLWindowWin32 *window_win32 = GST_GL_WINDOW_WIN32 (window);
gint bRet;
MSG msg;
GST_INFO ("begin message loop");
window_win32->priv->thread = g_thread_self ();
while (TRUE) {
bRet = GetMessage (&msg, NULL, 0, 0);
if (bRet == 0)
break;
else if (bRet == -1) {
GST_WARNING ("Failed to get message 0x%x",
(unsigned int) GetLastError ());
break;
} else {
GST_TRACE ("handle message");
TranslateMessage (&msg);
DispatchMessage (&msg);
}
}
GST_INFO ("end message loop");
}
/* Thread safe */
static void
gst_gl_window_win32_quit (GstGLWindow * window)
{
GstGLWindowWin32 *window_win32;
window_win32 = GST_GL_WINDOW_WIN32 (window);
window_win32->priv->thread = NULL;
if (window_win32 && window_win32->internal_win_id) {
LRESULT res =
PostMessage (window_win32->internal_win_id, WM_GST_GL_WINDOW_QUIT,
(WPARAM) 0, (LPARAM) 0);
GST_DEBUG ("end loop requested");
g_return_if_fail (SUCCEEDED (res));
}
}
typedef struct _GstGLMessage
{
GstGLWindowCB callback;
gpointer data;
GDestroyNotify destroy;
} GstGLMessage;
static gboolean
_run_message (GstGLMessage * message)
{
if (message->callback)
message->callback (message->data);
if (message->destroy)
message->destroy (message->data);
g_slice_free (GstGLMessage, message);
return FALSE;
}
/* Thread safe */
static void
gst_gl_window_win32_send_message_async (GstGLWindow * window,
GstGLWindowCB callback, gpointer data, GDestroyNotify destroy)
{
GstGLWindowWin32 *window_win32;
GstGLMessage *message;
window_win32 = GST_GL_WINDOW_WIN32 (window);
if (window_win32->priv->thread == g_thread_self ()) {
/* re-entracy... */
if (callback)
callback (data);
if (destroy)
destroy (data);
return;
}
message = g_slice_new (GstGLMessage);
if (window_win32) {
LRESULT res;
message->callback = callback;
message->data = data;
message->destroy = destroy;
res = PostMessage (window_win32->internal_win_id, WM_GST_GL_WINDOW_CUSTOM,
(WPARAM) message, (LPARAM) NULL);
g_return_if_fail (SUCCEEDED (res));
}
}
/* PRIVATE */
LRESULT CALLBACK
window_proc (HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
GstGLWindowWin32 *window_win32;
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);
return 0;
} 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:
{
if (window->resize) {
window->resize (window->resize_data, LOWORD (lParam),
HIWORD (lParam));
}
break;
}
case WM_PAINT:
{
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_GST_GL_WINDOW_QUIT:
{
HWND parent_id = 0;
GST_TRACE ("WM_GST_GL_WINDOW_QUIT");
parent_id = window_win32->parent_win_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");
}
window_win32->is_closed = TRUE;
RemoveProp (hWnd, "gl_window");
if (window_win32->internal_win_id) {
if (!DestroyWindow (window_win32->internal_win_id))
GST_WARNING ("failed to destroy window %" G_GUINTPTR_FORMAT
", 0x%x", (guintptr) hWnd, (unsigned int) GetLastError ());
}
PostQuitMessage (0);
break;
}
case WM_CAPTURECHANGED:
{
GST_DEBUG ("WM_CAPTURECHANGED");
if (window->draw)
window->draw (window->draw_data);
break;
}
case WM_GST_GL_WINDOW_CUSTOM:
{
if (!window_win32->is_closed) {
GstGLMessage *message = (GstGLMessage *) wParam;
_run_message (message);
}
break;
}
case WM_ERASEBKGND:
return TRUE;
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);
return DefWindowProc (hWnd, uMsg, wParam, lParam);
}
}
gst_object_unref (context);
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);
}