/* * 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); }