[cogl: 4/4] Add a WGL winsys
- From: Neil Roberts <nroberts src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [cogl: 4/4] Add a WGL winsys
- Date: Tue, 10 May 2011 16:57:36 +0000 (UTC)
commit 6788c803420e6c26616d2ce202f082c0b9841b02
Author: Neil Roberts <neil linux intel com>
Date: Mon May 9 17:48:50 2011 +0100
Add a WGL winsys
This adds a full winsys to handle WGL and Win32.
cogl/Makefile.am | 5 +
cogl/cogl-framebuffer-private.h | 8 +
cogl/cogl-framebuffer.c | 29 +
cogl/cogl-framebuffer.h | 15 +
cogl/cogl-renderer.c | 8 +-
cogl/cogl.h | 3 +
cogl/winsys/cogl-winsys-private.h | 5 +
cogl/winsys/cogl-winsys-wgl-feature-functions.h | 38 +
cogl/winsys/cogl-winsys-wgl.c | 838 +++++++++++++++++++++++
configure.ac | 26 +
10 files changed, 974 insertions(+), 1 deletions(-)
---
diff --git a/cogl/Makefile.am b/cogl/Makefile.am
index b3d7d3b..f8e4f57 100644
--- a/cogl/Makefile.am
+++ b/cogl/Makefile.am
@@ -319,6 +319,11 @@ cogl_sources_c += \
$(srcdir)/winsys/cogl-winsys-glx-feature-functions.h \
$(srcdir)/winsys/cogl-winsys-glx.c
endif
+if SUPPORT_WGL
+cogl_sources_c += \
+ $(srcdir)/winsys/cogl-winsys-wgl.c \
+ $(srcdir)/winsys/cogl-winsys-wgl-feature-functions.h
+endif
if SUPPORT_EGL_PLATFORM_POWERVR_X11
cogl_sources_c += \
$(srcdir)/winsys/cogl-winsys-egl.c
diff --git a/cogl/cogl-framebuffer-private.h b/cogl/cogl-framebuffer-private.h
index f48938f..42d7bab 100644
--- a/cogl/cogl-framebuffer-private.h
+++ b/cogl/cogl-framebuffer-private.h
@@ -38,6 +38,10 @@
#include <GL/glxext.h>
#endif
+#ifdef COGL_HAS_WIN32_SUPPORT
+#include <windows.h>
+#endif
+
typedef enum _CoglFramebufferType {
COGL_FRAMEBUFFER_TYPE_ONSCREEN,
COGL_FRAMEBUFFER_TYPE_OFFSCREEN
@@ -122,6 +126,10 @@ struct _CoglOnscreen
void *foreign_update_mask_data;
#endif
+#ifdef COGL_HAS_WIN32_SUPPORT
+ HWND foreign_hwnd;
+#endif
+
gboolean swap_throttled;
void *winsys;
diff --git a/cogl/cogl-framebuffer.c b/cogl/cogl-framebuffer.c
index 6afcd3f..73cce73 100644
--- a/cogl/cogl-framebuffer.c
+++ b/cogl/cogl-framebuffer.c
@@ -1679,6 +1679,35 @@ cogl_onscreen_x11_get_visual_xid (CoglOnscreen *onscreen)
}
#endif /* COGL_HAS_X11_SUPPORT */
+#ifdef COGL_HAS_WIN32_SUPPORT
+
+void
+cogl_onscreen_win32_set_foreign_window (CoglOnscreen *onscreen,
+ HWND hwnd)
+{
+ onscreen->foreign_hwnd = hwnd;
+}
+
+HWND
+cogl_onscreen_win32_get_window (CoglOnscreen *onscreen)
+{
+ if (onscreen->foreign_hwnd)
+ return onscreen->foreign_hwnd;
+ else
+ {
+ CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
+ const CoglWinsysVtable *winsys =
+ _cogl_framebuffer_get_winsys (framebuffer);
+
+ /* This should only be called for win32 onscreens */
+ g_return_val_if_fail (winsys->onscreen_win32_get_window != NULL, 0);
+
+ return winsys->onscreen_win32_get_window (onscreen);
+ }
+}
+
+#endif /* COGL_HAS_WIN32_SUPPORT */
+
unsigned int
cogl_framebuffer_add_swap_buffers_callback (CoglFramebuffer *framebuffer,
CoglSwapBuffersNotify callback,
diff --git a/cogl/cogl-framebuffer.h b/cogl/cogl-framebuffer.h
index b685031..02188b7 100644
--- a/cogl/cogl-framebuffer.h
+++ b/cogl/cogl-framebuffer.h
@@ -30,6 +30,9 @@
#include <glib.h>
+#ifdef COGL_HAS_WIN32
+#include <windows.h>
+#endif /* COGL_HAS_WIN32 */
G_BEGIN_DECLS
@@ -157,6 +160,18 @@ guint32
cogl_onscreen_x11_get_visual_xid (CoglOnscreen *onscreen);
#endif /* COGL_HAS_X11 */
+#ifdef COGL_HAS_WIN32_SUPPORT
+#define cogl_onscreen_win32_set_foreign_window \
+ cogl_onscreen_win32_set_foreign_window_EXP
+void
+cogl_onscreen_win32_set_foreign_window (CoglOnscreen *onscreen,
+ HWND hwnd);
+
+#define cogl_onscreen_win32_get_window cogl_onscreen_win32_get_window_EXP
+HWND
+cogl_onscreen_win32_get_window (CoglOnscreen *onscreen);
+#endif /* COGL_HAS_WIN32_SUPPORT */
+
#define cogl_onscreen_set_swap_throttled cogl_onscreen_set_swap_throttled_EXP
void
cogl_onscreen_set_swap_throttled (CoglOnscreen *onscreen,
diff --git a/cogl/cogl-renderer.c b/cogl/cogl-renderer.c
index 93e33a4..df05247 100644
--- a/cogl/cogl-renderer.c
+++ b/cogl/cogl-renderer.c
@@ -48,6 +48,9 @@ extern const CoglWinsysVtable *_cogl_winsys_glx_get_vtable (void);
#ifdef COGL_HAS_EGL_SUPPORT
extern const CoglWinsysVtable *_cogl_winsys_egl_get_vtable (void);
#endif
+#ifdef COGL_HAS_WGL_SUPPORT
+extern const CoglWinsysVtable *_cogl_winsys_wgl_get_vtable (void);
+#endif
typedef const CoglWinsysVtable *(*CoglWinsysVtableGetter) (void);
@@ -57,7 +60,10 @@ static CoglWinsysVtableGetter _cogl_winsys_vtable_getters[] =
_cogl_winsys_glx_get_vtable,
#endif
#ifdef COGL_HAS_EGL_SUPPORT
- _cogl_winsys_egl_get_vtable
+ _cogl_winsys_egl_get_vtable,
+#endif
+#ifdef COGL_HAS_WGL_SUPPORT
+ _cogl_winsys_wgl_get_vtable,
#endif
};
diff --git a/cogl/cogl.h b/cogl/cogl.h
index cbd2d0c..75c37de 100644
--- a/cogl/cogl.h
+++ b/cogl/cogl.h
@@ -88,6 +88,9 @@ typedef struct _CoglFramebuffer CoglFramebuffer;
#ifdef COGL_HAS_XLIB
#include <cogl/cogl-xlib.h>
#endif
+#ifdef COGL_HAS_WIN32
+#include <cogl/cogl-win32.h>
+#endif
/* XXX: This will definitly go away once all the Clutter winsys
* code has been migrated down into Cogl! */
#include <cogl/cogl-clutter.h>
diff --git a/cogl/winsys/cogl-winsys-private.h b/cogl/winsys/cogl-winsys-private.h
index 3942b7c..2208a86 100644
--- a/cogl/winsys/cogl-winsys-private.h
+++ b/cogl/winsys/cogl-winsys-private.h
@@ -118,6 +118,11 @@ typedef struct _CoglWinsysVtable
guint32
(*onscreen_x11_get_window_xid) (CoglOnscreen *onscreen);
+#ifdef COGL_HAS_WIN32_SUPPORT
+ HWND
+ (*onscreen_win32_get_window) (CoglOnscreen *onscreen);
+#endif
+
unsigned int
(*onscreen_add_swap_buffers_callback) (CoglOnscreen *onscreen,
CoglSwapBuffersNotify callback,
diff --git a/cogl/winsys/cogl-winsys-wgl-feature-functions.h b/cogl/winsys/cogl-winsys-wgl-feature-functions.h
new file mode 100644
index 0000000..d22d9c3
--- /dev/null
+++ b/cogl/winsys/cogl-winsys-wgl-feature-functions.h
@@ -0,0 +1,38 @@
+/*
+ * Cogl
+ *
+ * An object oriented GL/GLES Abstraction/Utility Layer
+ *
+ * Copyright (C) 2011 Intel Corporation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ *
+ * Authors:
+ * Neil Roberts <neil linux intel com>
+ */
+
+/* See cogl-winsys-glx-feature-functions.h for a description of how
+ this file is used */
+
+COGL_WINSYS_FEATURE_BEGIN (swap_control,
+ "EXT\0",
+ "swap_control\0",
+ 0,
+ 0,
+ COGL_WINSYS_FEATURE_SWAP_THROTTLE)
+COGL_WINSYS_FEATURE_FUNCTION (int, wglSwapInterval,
+ (int interval))
+COGL_WINSYS_FEATURE_END ()
diff --git a/cogl/winsys/cogl-winsys-wgl.c b/cogl/winsys/cogl-winsys-wgl.c
new file mode 100644
index 0000000..47dd6f0
--- /dev/null
+++ b/cogl/winsys/cogl-winsys-wgl.c
@@ -0,0 +1,838 @@
+/*
+ * Cogl
+ *
+ * An object oriented GL/GLES Abstraction/Utility Layer
+ *
+ * Copyright (C) 2010,2011 Intel Corporation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ *
+ * Authors:
+ * Neil Roberts <neil linux intel com>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <windows.h>
+
+#include "cogl.h"
+
+#include "cogl-winsys-private.h"
+#include "cogl-context-private.h"
+#include "cogl-framebuffer.h"
+#include "cogl-swap-chain-private.h"
+#include "cogl-renderer-private.h"
+#include "cogl-display-private.h"
+#include "cogl-onscreen-template-private.h"
+#include "cogl-private.h"
+#include "cogl-feature-private.h"
+
+typedef struct _CoglRendererWgl
+{
+ /* Function pointers for GLX specific extensions */
+#define COGL_WINSYS_FEATURE_BEGIN(a, b, c, d, e, f)
+
+#define COGL_WINSYS_FEATURE_FUNCTION(ret, name, args) \
+ ret (APIENTRY * pf_ ## name) args;
+
+#define COGL_WINSYS_FEATURE_END()
+
+#include "cogl-winsys-wgl-feature-functions.h"
+
+#undef COGL_WINSYS_FEATURE_BEGIN
+#undef COGL_WINSYS_FEATURE_FUNCTION
+#undef COGL_WINSYS_FEATURE_END
+} CoglRendererWgl;
+
+typedef struct _CoglDisplayWgl
+{
+ ATOM window_class;
+ HGLRC wgl_context;
+ HWND dummy_hwnd;
+ HDC dummy_dc;
+} CoglDisplayWgl;
+
+typedef struct _CoglOnscreenWin32
+{
+ HWND hwnd;
+ gboolean is_foreign_hwnd;
+} CoglOnscreenWin32;
+
+typedef struct _CoglContextWgl
+{
+ HDC current_dc;
+} CoglContextWgl;
+
+typedef struct _CoglOnscreenWgl
+{
+ CoglOnscreenWin32 _parent;
+
+ HDC client_dc;
+
+ gboolean swap_throttled;
+} CoglOnscreenWgl;
+
+/* Define a set of arrays containing the functions required from GL
+ for each winsys feature */
+#define COGL_WINSYS_FEATURE_BEGIN(name, namespaces, extension_names, \
+ feature_flags, feature_flags_private, \
+ winsys_feature) \
+ static const CoglFeatureFunction \
+ cogl_wgl_feature_ ## name ## _funcs[] = {
+#define COGL_WINSYS_FEATURE_FUNCTION(ret, name, args) \
+ { G_STRINGIFY (name), G_STRUCT_OFFSET (CoglRendererWgl, pf_ ## name) },
+#define COGL_WINSYS_FEATURE_END() \
+ { NULL, 0 }, \
+ };
+#include "cogl-winsys-wgl-feature-functions.h"
+
+/* Define an array of features */
+#undef COGL_WINSYS_FEATURE_BEGIN
+#define COGL_WINSYS_FEATURE_BEGIN(name, namespaces, extension_names, \
+ feature_flags, feature_flags_private, \
+ winsys_feature) \
+ { 255, 255, namespaces, extension_names, \
+ feature_flags, feature_flags_private, \
+ winsys_feature, \
+ cogl_wgl_feature_ ## name ## _funcs },
+#undef COGL_WINSYS_FEATURE_FUNCTION
+#define COGL_WINSYS_FEATURE_FUNCTION(ret, name, args)
+#undef COGL_WINSYS_FEATURE_END
+#define COGL_WINSYS_FEATURE_END()
+
+static const CoglFeatureData winsys_feature_data[] =
+ {
+#include "cogl-winsys-wgl-feature-functions.h"
+ };
+
+static CoglFuncPtr
+_cogl_winsys_get_proc_address (const char *name)
+{
+ return (CoglFuncPtr) wglGetProcAddress ((LPCSTR) name);
+}
+
+static void
+_cogl_winsys_renderer_disconnect (CoglRenderer *renderer)
+{
+ g_slice_free (CoglRendererWgl, renderer->winsys);
+}
+
+static CoglOnscreen *
+find_onscreen_for_hwnd (CoglContext *context, HWND hwnd)
+{
+ CoglDisplayWgl *display_wgl = context->display->winsys;
+ GList *l;
+
+ /* If the hwnd has Cogl's window class then we can lookup the
+ onscreen pointer directly by reading the extra window data */
+ if (GetClassLongPtr (hwnd, GCW_ATOM) == display_wgl->window_class)
+ {
+ CoglOnscreen *onscreen = (CoglOnscreen *) GetWindowLongPtr (hwnd, 0);
+
+ if (onscreen)
+ return onscreen;
+ }
+
+ for (l = context->framebuffers; l; l = l->next)
+ {
+ CoglFramebuffer *framebuffer = l->data;
+
+ if (framebuffer->type == COGL_FRAMEBUFFER_TYPE_ONSCREEN)
+ {
+ CoglOnscreenWin32 *win32_onscreen =
+ COGL_ONSCREEN (framebuffer)->winsys;
+
+ if (win32_onscreen->hwnd == hwnd)
+ return COGL_ONSCREEN (framebuffer);
+ }
+ }
+
+ return NULL;
+}
+
+static CoglFilterReturn
+win32_event_filter_cb (void *native_event, void *data)
+{
+ MSG *msg = native_event;
+ CoglContext *context = data;
+
+ if (msg->message == WM_SIZE)
+ {
+ CoglOnscreen *onscreen =
+ find_onscreen_for_hwnd (context, msg->hwnd);
+
+ if (onscreen)
+ {
+ CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
+
+ /* Ignore size changes resulting from the stage being
+ minimized - otherwise it will think the window has been
+ resized to 0,0 */
+ if (msg->wParam != SIZE_MINIMIZED)
+ {
+ WORD new_width = LOWORD (msg->lParam);
+ WORD new_height = HIWORD (msg->lParam);
+ _cogl_framebuffer_winsys_update_size (framebuffer,
+ new_width,
+ new_height);
+ }
+ }
+ }
+
+ return COGL_FILTER_CONTINUE;
+}
+
+static gboolean
+_cogl_winsys_renderer_connect (CoglRenderer *renderer,
+ GError **error)
+{
+ renderer->winsys = g_slice_new0 (CoglRendererWgl);
+
+ return TRUE;
+}
+
+static LRESULT CALLBACK
+window_proc (HWND hwnd, UINT umsg,
+ WPARAM wparam, LPARAM lparam)
+{
+ gboolean message_handled = FALSE;
+ CoglOnscreen *onscreen;
+
+ /* It's not clear what the best thing to do with messages sent to
+ the window proc is. We want the application to forward on all
+ messages through Cogl so that it can have a chance to process
+ them which might mean that that in it's GetMessage loop it could
+ call cogl_renderer_handle_native_event for every message. However
+ the message loop would usually call DispatchMessage as well which
+ mean this window proc would be invoked and Cogl would see the
+ message twice. However we can't just ignore messages in the
+ window proc because some messages are sent directly from windows
+ without going through the message queue. This function therefore
+ just forwards on all messages directly. This means that the
+ application is not expected to forward on messages if it has let
+ Cogl create the window itself because it will already see them
+ via the window proc. This limits the kinds of messages that Cogl
+ can handle to ones that are sent to the windows it creates, but I
+ think that is a reasonable restriction */
+
+ /* Convert the message to a MSG struct and pass it through the Cogl
+ message handling mechanism */
+
+ /* This window proc is only called for messages created with Cogl's
+ window class so we should be able to work out the corresponding
+ window class by looking in the extra window data. Windows will
+ send some extra messages before we get a chance to set this value
+ so we have to ignore these */
+ onscreen = (CoglOnscreen *) GetWindowLongPtr (hwnd, 0);
+
+ if (onscreen != NULL)
+ {
+ CoglRenderer *renderer;
+ DWORD message_pos;
+ MSG msg;
+
+ msg.hwnd = hwnd;
+ msg.message = umsg;
+ msg.wParam = wparam;
+ msg.lParam = lparam;
+ msg.time = GetMessageTime ();
+ /* Neither MAKE_POINTS nor GET_[XY]_LPARAM is defined in MinGW
+ headers so we need to convert to a signed type explicitly */
+ message_pos = GetMessagePos ();
+ msg.pt.x = (SHORT) LOWORD (message_pos);
+ msg.pt.y = (SHORT) HIWORD (message_pos);
+
+ renderer = COGL_FRAMEBUFFER (onscreen)->context->display->renderer;
+
+ message_handled =
+ cogl_renderer_handle_native_event (renderer, &msg);
+ }
+
+ if (!message_handled)
+ return DefWindowProcW (hwnd, umsg, wparam, lparam);
+ else
+ return 0;
+}
+
+static gboolean
+pixel_format_is_better (const PIXELFORMATDESCRIPTOR *pfa,
+ const PIXELFORMATDESCRIPTOR *pfb)
+{
+ /* Always prefer a format with a stencil buffer */
+ if (pfa->cStencilBits == 0)
+ {
+ if (pfb->cStencilBits > 0)
+ return TRUE;
+ }
+ else if (pfb->cStencilBits == 0)
+ return FALSE;
+
+ /* Prefer a bigger color buffer */
+ if (pfb->cColorBits > pfa->cColorBits)
+ return TRUE;
+ else if (pfb->cColorBits < pfa->cColorBits)
+ return FALSE;
+
+ /* Prefer a bigger depth buffer */
+ return pfb->cDepthBits > pfa->cDepthBits;
+}
+
+static int
+choose_pixel_format (HDC dc, PIXELFORMATDESCRIPTOR *pfd)
+{
+ int i, num_formats, best_pf = 0;
+ PIXELFORMATDESCRIPTOR best_pfd;
+
+ num_formats = DescribePixelFormat (dc, 0, sizeof (best_pfd), NULL);
+
+ for (i = 1; i <= num_formats; i++)
+ {
+ memset (pfd, 0, sizeof (*pfd));
+
+ if (DescribePixelFormat (dc, i, sizeof (best_pfd), pfd) &&
+ /* Check whether this format is useable by Cogl */
+ ((pfd->dwFlags & (PFD_SUPPORT_OPENGL |
+ PFD_DRAW_TO_WINDOW |
+ PFD_DOUBLEBUFFER |
+ PFD_GENERIC_FORMAT)) ==
+ (PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER | PFD_DRAW_TO_WINDOW)) &&
+ pfd->iPixelType == PFD_TYPE_RGBA &&
+ pfd->cColorBits >= 16 && pfd->cColorBits <= 32 &&
+ pfd->cDepthBits >= 16 && pfd->cDepthBits <= 32 &&
+ /* Check whether this is a better format than one we've
+ already found */
+ (best_pf == 0 || pixel_format_is_better (&best_pfd, pfd)))
+ {
+ best_pf = i;
+ best_pfd = *pfd;
+ }
+ }
+
+ *pfd = best_pfd;
+
+ return best_pf;
+}
+
+static gboolean
+create_window_class (CoglDisplay *display, GError **error)
+{
+ CoglDisplayWgl *wgl_display = display->winsys;
+ char *class_name_ascii, *src;
+ WCHAR *class_name_wchar, *dst;
+ WNDCLASSW wndclass;
+
+ /* We create a window class per display so that we have an
+ opportunity to clean up the class when the display is
+ destroyed */
+
+ /* Generate a unique name containing the address of the display */
+ class_name_ascii = g_strdup_printf ("CoglWindow0x%0*" G_GINTPTR_MODIFIER "x",
+ sizeof (guintptr) * 2,
+ (guintptr) display);
+ /* Convert it to WCHARs */
+ class_name_wchar = g_malloc ((strlen (class_name_ascii) + 1) *
+ sizeof (WCHAR));
+ for (src = class_name_ascii, dst = class_name_wchar;
+ *src;
+ src++, dst++)
+ *dst = *src;
+ *dst = L'\0';
+
+ memset (&wndclass, 0, sizeof (wndclass));
+ wndclass.style = CS_DBLCLKS | CS_HREDRAW | CS_VREDRAW;
+ wndclass.lpfnWndProc = window_proc;
+ /* We reserve extra space in the window data for a pointer back to
+ the CoglOnscreen */
+ wndclass.cbWndExtra = sizeof (LONG_PTR);
+ wndclass.hInstance = GetModuleHandleW (NULL);
+ wndclass.hIcon = LoadIconW (NULL, (LPWSTR) IDI_APPLICATION);
+ wndclass.hCursor = LoadCursorW (NULL, (LPWSTR) IDC_ARROW);
+ wndclass.hbrBackground = NULL;
+ wndclass.lpszMenuName = NULL;
+ wndclass.lpszClassName = class_name_wchar;
+ wgl_display->window_class = RegisterClassW (&wndclass);
+
+ g_free (class_name_wchar);
+ g_free (class_name_ascii);
+
+ if (wgl_display->window_class == 0)
+ {
+ g_set_error (error, COGL_WINSYS_ERROR,
+ COGL_WINSYS_ERROR_CREATE_CONTEXT,
+ "Unable to register window class");
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+static gboolean
+create_context (CoglDisplay *display, GError **error)
+{
+ CoglDisplayWgl *wgl_display = display->winsys;
+
+ g_return_val_if_fail (wgl_display->wgl_context == NULL, FALSE);
+
+ /* Cogl assumes that there is always a GL context selected; in order
+ * to make sure that a WGL context exists and is made current, we
+ * use a small dummy window that never gets shown to which we can
+ * always fall back if no onscreen is available
+ */
+ if (wgl_display->dummy_hwnd == NULL)
+ {
+ wgl_display->dummy_hwnd =
+ CreateWindowW ((LPWSTR) MAKEINTATOM (wgl_display->window_class),
+ L".",
+ WS_OVERLAPPEDWINDOW,
+ CW_USEDEFAULT,
+ CW_USEDEFAULT,
+ 1, 1,
+ NULL, NULL,
+ GetModuleHandle (NULL),
+ NULL);
+
+ if (wgl_display->dummy_hwnd == NULL)
+ {
+ g_set_error (error, COGL_WINSYS_ERROR,
+ COGL_WINSYS_ERROR_CREATE_CONTEXT,
+ "Unable to create dummy window");
+ return FALSE;
+ }
+ }
+
+ if (wgl_display->dummy_dc == NULL)
+ {
+ PIXELFORMATDESCRIPTOR pfd;
+ int pf;
+
+ wgl_display->dummy_dc = GetDC (wgl_display->dummy_hwnd);
+
+ pf = choose_pixel_format (wgl_display->dummy_dc, &pfd);
+
+ if (pf == 0 || !SetPixelFormat (wgl_display->dummy_dc, pf, &pfd))
+ {
+ g_set_error (error, COGL_WINSYS_ERROR,
+ COGL_WINSYS_ERROR_CREATE_CONTEXT,
+ "Unable to find suitable GL pixel format");
+ ReleaseDC (wgl_display->dummy_hwnd, wgl_display->dummy_dc);
+ wgl_display->dummy_dc = NULL;
+ return FALSE;
+ }
+ }
+
+ if (wgl_display->wgl_context == NULL)
+ {
+ wgl_display->wgl_context = wglCreateContext (wgl_display->dummy_dc);
+
+ if (wgl_display->wgl_context == NULL)
+ {
+ g_set_error (error, COGL_WINSYS_ERROR,
+ COGL_WINSYS_ERROR_CREATE_CONTEXT,
+ "Unable to create suitable GL context");
+ return FALSE;
+ }
+ }
+
+ COGL_NOTE (WINSYS, "Selecting dummy 0x%x for the WGL context",
+ (unsigned int) wgl_display->dummy_hwnd);
+
+ wglMakeCurrent (wgl_display->dummy_dc, wgl_display->wgl_context);
+
+ return TRUE;
+}
+
+static void
+_cogl_winsys_display_destroy (CoglDisplay *display)
+{
+ CoglDisplayWgl *wgl_display = display->winsys;
+
+ g_return_if_fail (wgl_display != NULL);
+
+ if (wgl_display->wgl_context)
+ {
+ wglMakeCurrent (NULL, NULL);
+ wglDeleteContext (wgl_display->wgl_context);
+ }
+
+ if (wgl_display->dummy_dc)
+ ReleaseDC (wgl_display->dummy_hwnd, wgl_display->dummy_dc);
+
+ if (wgl_display->dummy_hwnd)
+ DestroyWindow (wgl_display->dummy_hwnd);
+
+ if (wgl_display->window_class)
+ UnregisterClassW ((LPWSTR) MAKEINTATOM (wgl_display->window_class),
+ GetModuleHandleW (NULL));
+
+ g_slice_free (CoglDisplayWgl, display->winsys);
+ display->winsys = NULL;
+}
+
+static gboolean
+_cogl_winsys_display_setup (CoglDisplay *display,
+ GError **error)
+{
+ CoglDisplayWgl *wgl_display;
+
+ g_return_val_if_fail (display->winsys == NULL, FALSE);
+
+ wgl_display = g_slice_new0 (CoglDisplayWgl);
+ display->winsys = wgl_display;
+
+ if (!create_window_class (display, error))
+ goto error;
+
+ if (!create_context (display, error))
+ goto error;
+
+ return TRUE;
+
+error:
+ _cogl_winsys_display_destroy (display);
+ return FALSE;
+}
+
+static const char *
+get_wgl_extensions_string (HDC dc)
+{
+ const char * (APIENTRY *pf_wglGetExtensionsStringARB) (HDC);
+ const char * (APIENTRY *pf_wglGetExtensionsStringEXT) (void);
+
+ /* According to the docs for these two extensions, you are supposed
+ to use wglGetProcAddress to detect their availability so
+ presumably it will return NULL if they are not available */
+
+ pf_wglGetExtensionsStringARB =
+ (void *) wglGetProcAddress ("wglGetExtensionsStringARB");
+
+ if (pf_wglGetExtensionsStringARB)
+ return pf_wglGetExtensionsStringARB (dc);
+
+ pf_wglGetExtensionsStringEXT =
+ (void *) wglGetProcAddress ("wglGetExtensionsStringEXT");
+
+ if (pf_wglGetExtensionsStringEXT)
+ return pf_wglGetExtensionsStringEXT ();
+
+ /* The WGL_EXT_swap_control is also advertised as a GL extension as
+ GL_EXT_SWAP_CONTROL so if the extension to get the list of WGL
+ extensions isn't supported then we can at least fake it to
+ support the swap control extension */
+ if (_cogl_check_extension ("WGL_EXT_swap_control",
+ (char *) glGetString (GL_EXTENSIONS)))
+ return "WGL_EXT_swap_control";
+
+ return NULL;
+}
+
+static void
+update_winsys_features (CoglContext *context)
+{
+ CoglDisplayWgl *wgl_display = context->display->winsys;
+ CoglRendererWgl *wgl_renderer = context->display->renderer->winsys;
+ const char *wgl_extensions;
+ int i;
+
+ g_return_if_fail (wgl_display->wgl_context);
+
+ _cogl_gl_update_features (context);
+
+ memset (context->winsys_features, 0, sizeof (context->winsys_features));
+
+ context->feature_flags |= COGL_FEATURE_ONSCREEN_MULTIPLE;
+ COGL_FLAGS_SET (context->winsys_features,
+ COGL_WINSYS_FEATURE_MULTIPLE_ONSCREEN,
+ TRUE);
+
+ wgl_extensions = get_wgl_extensions_string (wgl_display->dummy_dc);
+
+ if (wgl_extensions)
+ {
+ COGL_NOTE (WINSYS, " WGL Extensions: %s", wgl_extensions);
+
+ for (i = 0; i < G_N_ELEMENTS (winsys_feature_data); i++)
+ if (_cogl_feature_check ("WGL", winsys_feature_data + i, 0, 0,
+ wgl_extensions,
+ wgl_renderer))
+ {
+ context->feature_flags |= winsys_feature_data[i].feature_flags;
+ if (winsys_feature_data[i].winsys_feature)
+ COGL_FLAGS_SET (context->winsys_features,
+ winsys_feature_data[i].winsys_feature,
+ TRUE);
+ }
+ }
+}
+
+static gboolean
+_cogl_winsys_context_init (CoglContext *context, GError **error)
+{
+ CoglContextWgl *wgl_context;
+
+ wgl_context = context->winsys = g_new0 (CoglContextWgl, 1);
+
+ cogl_renderer_add_native_filter (context->display->renderer,
+ win32_event_filter_cb,
+ context);
+
+ update_winsys_features (context);
+
+ return TRUE;
+}
+
+static void
+_cogl_winsys_context_deinit (CoglContext *context)
+{
+ cogl_renderer_remove_native_filter (context->display->renderer,
+ win32_event_filter_cb,
+ context);
+
+ g_free (context->winsys);
+}
+
+static gboolean
+_cogl_winsys_onscreen_init (CoglOnscreen *onscreen,
+ GError **error)
+{
+ CoglFramebuffer *framebuffer = COGL_FRAMEBUFFER (onscreen);
+ CoglContext *context = framebuffer->context;
+ CoglDisplay *display = context->display;
+ CoglDisplayWgl *wgl_display = display->winsys;
+ CoglOnscreenWgl *wgl_onscreen;
+ CoglOnscreenWin32 *win32_onscreen;
+ PIXELFORMATDESCRIPTOR pfd;
+ int pf;
+ HWND hwnd;
+
+ g_return_val_if_fail (wgl_display->wgl_context, FALSE);
+
+ /* XXX: Note we ignore the user's original width/height when given a
+ * foreign window. */
+ if (onscreen->foreign_hwnd)
+ {
+ RECT client_rect;
+
+ hwnd = onscreen->foreign_hwnd;
+
+ GetClientRect (hwnd, &client_rect);
+
+ _cogl_framebuffer_winsys_update_size (framebuffer,
+ client_rect.right,
+ client_rect.bottom);
+ }
+ else
+ {
+ int width, height;
+
+ width = COGL_FRAMEBUFFER (onscreen)->width;
+ height = COGL_FRAMEBUFFER (onscreen)->height;
+
+ /* The size of the window passed to CreateWindow for some reason
+ includes the window decorations so we need to compensate for
+ that */
+ width += GetSystemMetrics (SM_CXSIZEFRAME) * 2;
+ height += (GetSystemMetrics (SM_CYSIZEFRAME) * 2 +
+ GetSystemMetrics (SM_CYCAPTION));
+
+ hwnd = CreateWindowW ((LPWSTR) MAKEINTATOM (wgl_display->window_class),
+ L".",
+ WS_OVERLAPPEDWINDOW,
+ CW_USEDEFAULT, /* xpos */
+ CW_USEDEFAULT, /* ypos */
+ width,
+ height,
+ NULL, /* parent */
+ NULL, /* menu */
+ GetModuleHandle (NULL),
+ NULL /* lparam for the WM_CREATE message */);
+
+ if (hwnd == NULL)
+ {
+ g_set_error (error, COGL_WINSYS_ERROR,
+ COGL_WINSYS_ERROR_CREATE_ONSCREEN,
+ "Unable to create window");
+ return FALSE;
+ }
+
+ /* Store a pointer back to the onscreen in the window extra data
+ so we can refer back to it quickly */
+ SetWindowLongPtrW (hwnd, 0, (LONG_PTR) onscreen);
+ }
+
+ onscreen->winsys = g_slice_new0 (CoglOnscreenWgl);
+ win32_onscreen = onscreen->winsys;
+ wgl_onscreen = onscreen->winsys;
+
+ win32_onscreen->hwnd = hwnd;
+
+ wgl_onscreen->client_dc = GetDC (hwnd);
+
+ /* Use the same pixel format as the dummy DC from the renderer */
+ pf = GetPixelFormat (wgl_display->dummy_dc);
+ DescribePixelFormat (wgl_display->dummy_dc, pf, sizeof (pfd), &pfd);
+ if (!SetPixelFormat (wgl_onscreen->client_dc, pf, &pfd))
+ {
+ g_set_error (error, COGL_WINSYS_ERROR,
+ COGL_WINSYS_ERROR_CREATE_ONSCREEN,
+ "Error setting pixel format on the window");
+ ReleaseDC (hwnd, wgl_onscreen->client_dc);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+static void
+_cogl_winsys_onscreen_bind (CoglOnscreen *onscreen)
+{
+ CoglContext *context;
+ CoglContextWgl *wgl_context;
+ CoglDisplayWgl *wgl_display;
+ CoglOnscreenWgl *wgl_onscreen;
+ CoglRendererWgl *wgl_renderer;
+
+ /* The glx backend tries to bind the dummy context if onscreen ==
+ NULL, but this isn't really going to work because before checking
+ whether onscreen == NULL it reads the pointer to get the
+ context */
+ g_return_if_fail (onscreen != NULL);
+
+ context = COGL_FRAMEBUFFER (onscreen)->context;
+ wgl_context = context->winsys;
+ wgl_display = context->display->winsys;
+ wgl_onscreen = onscreen->winsys;
+ wgl_renderer = context->display->renderer->winsys;
+
+ if (wgl_context->current_dc == wgl_onscreen->client_dc)
+ return;
+
+ wglMakeCurrent (wgl_onscreen->client_dc, wgl_display->wgl_context);
+
+ /* According to the specs for WGL_EXT_swap_control SwapInterval()
+ * applies to the current window not the context so we apply it here
+ * to ensure its up-to-date even for new windows.
+ */
+ if (wgl_renderer->pf_wglSwapInterval)
+ {
+ if (onscreen->swap_throttled)
+ wgl_renderer->pf_wglSwapInterval (1);
+ else
+ wgl_renderer->pf_wglSwapInterval (0);
+ }
+
+ wgl_context->current_dc = wgl_onscreen->client_dc;
+}
+
+static void
+_cogl_winsys_onscreen_deinit (CoglOnscreen *onscreen)
+{
+ CoglContext *context = COGL_FRAMEBUFFER (onscreen)->context;
+ CoglContextWgl *wgl_context = context->winsys;
+ CoglOnscreenWin32 *win32_onscreen = onscreen->winsys;
+ CoglOnscreenWgl *wgl_onscreen = onscreen->winsys;
+
+ if (wgl_context->current_dc == wgl_onscreen->client_dc)
+ _cogl_winsys_onscreen_bind (NULL);
+
+ ReleaseDC (win32_onscreen->hwnd, wgl_onscreen->client_dc);
+
+ if (!win32_onscreen->is_foreign_hwnd)
+ {
+ /* Drop the pointer to the onscreen in the window so that any
+ further messages won't be processed */
+ SetWindowLongPtrW (win32_onscreen->hwnd, 0, (LONG_PTR) 0);
+ DestroyWindow (win32_onscreen->hwnd);
+ }
+}
+
+static void
+_cogl_winsys_onscreen_swap_buffers (CoglOnscreen *onscreen)
+{
+ CoglOnscreenWgl *wgl_onscreen = onscreen->winsys;
+
+ SwapBuffers (wgl_onscreen->client_dc);
+}
+
+static void
+_cogl_winsys_onscreen_update_swap_throttled (CoglOnscreen *onscreen)
+{
+ CoglContext *context = COGL_FRAMEBUFFER (onscreen)->context;
+ CoglContextWgl *wgl_context = context->winsys;
+ CoglOnscreenWgl *wgl_onscreen = onscreen->winsys;
+
+ if (wgl_context->current_dc != wgl_onscreen->client_dc)
+ return;
+
+ /* This will cause it to rebind the context and update the swap interval */
+ wgl_context->current_dc = NULL;
+ _cogl_winsys_onscreen_bind (onscreen);
+}
+
+static HWND
+_cogl_winsys_onscreen_win32_get_window (CoglOnscreen *onscreen)
+{
+ CoglOnscreenWin32 *win32_onscreen = onscreen->winsys;
+ return win32_onscreen->hwnd;
+}
+
+static void
+_cogl_winsys_onscreen_set_visibility (CoglOnscreen *onscreen,
+ gboolean visibility)
+{
+ CoglOnscreenWin32 *win32_onscreen = onscreen->winsys;
+
+ ShowWindow (win32_onscreen->hwnd, visibility ? SW_SHOW : SW_HIDE);
+}
+
+const CoglWinsysVtable *
+_cogl_winsys_wgl_get_vtable (void)
+{
+ static gboolean vtable_inited = FALSE;
+ static CoglWinsysVtable vtable;
+
+ /* It would be nice if we could use C99 struct initializers here
+ like the GLX backend does. However this code is more likely to be
+ compiled using Visual Studio which (still!) doesn't support them
+ so we initialize it in code instead */
+
+ if (!vtable_inited)
+ {
+ memset (&vtable, 0, sizeof (vtable));
+
+ vtable.name = "WGL";
+ vtable.get_proc_address = _cogl_winsys_get_proc_address;
+ vtable.renderer_connect = _cogl_winsys_renderer_connect;
+ vtable.renderer_disconnect = _cogl_winsys_renderer_disconnect;
+ vtable.display_setup = _cogl_winsys_display_setup;
+ vtable.display_destroy = _cogl_winsys_display_destroy;
+ vtable.context_init = _cogl_winsys_context_init;
+ vtable.context_deinit = _cogl_winsys_context_deinit;
+ vtable.onscreen_init = _cogl_winsys_onscreen_init;
+ vtable.onscreen_deinit = _cogl_winsys_onscreen_deinit;
+ vtable.onscreen_bind = _cogl_winsys_onscreen_bind;
+ vtable.onscreen_swap_buffers = _cogl_winsys_onscreen_swap_buffers;
+ vtable.onscreen_update_swap_throttled =
+ _cogl_winsys_onscreen_update_swap_throttled;
+ vtable.onscreen_set_visibility = _cogl_winsys_onscreen_set_visibility;
+ vtable.onscreen_win32_get_window = _cogl_winsys_onscreen_win32_get_window;
+
+ vtable_inited = TRUE;
+ }
+
+ return &vtable;
+}
diff --git a/configure.ac b/configure.ac
index 8f346e3..013b3a8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -404,6 +404,7 @@ AS_IF([test "x$enable_gl" = "xyes"],
[
COGL_EXTRA_LDFLAGS="$COGL_EXTRA_LDFLAGS -lopengl32 -lgdi32 -lwinmm"
COGL_EXTRA_CFLAGS="$COGL_EXTRA_CFLAGS -D_WIN32_WINNT=0x0500"
+ ALLOW_WGL=yes
],
[
PKG_CHECK_EXISTS(
@@ -446,6 +447,7 @@ AS_IF([test "x$enable_stub_winsys" = "xyes"],
[
GL_WINSYS_APIS="$GL_WINSYS_APIS stub"
ALLOW_GLX=no
+ ALLOW_WGL=no
])
AM_CONDITIONAL(SUPPORT_STUB, [test "x$enable_stub_winsys" = "xyes"])
@@ -481,6 +483,30 @@ AS_IF([test "x$enable_glx" = "xyes"],
])
AM_CONDITIONAL(SUPPORT_GLX, [test "x$SUPPORT_GLX" = "xyes"])
+AC_ARG_ENABLE(
+ [wgl],
+ [AC_HELP_STRING([--enable-wgl=@<:@no/yes@:>@], [Enable support for WGL @<:@default=auto@:>@])],
+ [],
+ [AS_IF([test "x$ALLOW_WGL" = "xyes"], [enable_wgl=yes], [enable_wgl=no])]
+)
+AS_IF([test "x$enable_wgl" = "xyes"],
+ [
+ AS_IF([test "x$enable_stub_winsys" = "xyes"],
+ [AC_MSG_ERROR([Stub winsys not currently compatible with others])])
+
+ AS_IF([test "x$ALLOW_WGL" != "xyes"],
+ [AC_MSG_ERROR([WGL not supported with $COGL_DRIVER driver])])
+
+ SUPPORT_WGL=yes
+ GL_WINSYS_APIS="$GL_WINSYS_APIS wgl"
+
+ AC_DEFINE([COGL_HAS_WGL_SUPPORT], [1], [Cogl supports OpenGL using the WGL API])
+ COGL_DEFINES_SYMBOLS="$COGL_DEFINES_SYMBOLS COGL_HAS_WIN32_SUPPORT"
+
+ AC_DEFINE([COGL_HAS_FULL_WINSYS], [1],
+ [Cogl can create its own OpenGL context])
+ ])
+AM_CONDITIONAL(SUPPORT_WGL, [test "x$SUPPORT_WGL" = "xyes"])
EGL_PLATFORM_COUNT=0
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