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win32: Use the Cogl WGL winsys

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Cogl now has a full WGL winsys so Clutter doesn't need to directly
deal with WGL itself.
This commit is contained in:
Neil Roberts 2011-04-21 16:52:54 +01:00
parent 36e3a19722
commit f5ace7b2a5
5 changed files with 129 additions and 303 deletions
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344
clutter/win32/clutter-backend-win32.c
View File

@ -54,6 +54,15 @@ static HINSTANCE clutter_hinst = NULL;
/* various flags corresponding to pre init setup calls */
static gboolean _no_event_retrieval = FALSE;
G_CONST_RETURN gchar *
_clutter_backend_win32_get_vblank (void)
{
if (clutter_vblank_name && strcmp (clutter_vblank_name, "0") == 0)
return "none";
else
return clutter_vblank_name;
}
gboolean
clutter_backend_win32_pre_parse (ClutterBackend *backend,
GError **error)
@ -125,6 +134,7 @@ clutter_backend_win32_finalize (GObject *gobject)
static void
clutter_backend_win32_dispose (GObject *gobject)
{
ClutterBackend *backend = CLUTTER_BACKEND (gobject);
ClutterBackendWin32 *backend_win32 = CLUTTER_BACKEND_WIN32 (gobject);
ClutterStageManager *stage_manager;
@ -139,26 +149,13 @@ clutter_backend_win32_dispose (GObject *gobject)
/* Unrealize all shaders, since the GL context is going away */
_clutter_shader_release_all ();
if (backend_win32->gl_context)
{
wglMakeCurrent (NULL, NULL);
wglDeleteContext (backend_win32->gl_context);
backend_win32->gl_context = NULL;
}
if (backend_win32->dummy_dc)
{
ReleaseDC (backend_win32->dummy_hwnd, backend_win32->dummy_dc);
backend_win32->dummy_dc = NULL;
}
if (backend_win32->dummy_hwnd)
{
DestroyWindow (backend_win32->dummy_hwnd);
backend_win32->dummy_hwnd = NULL;
}
G_OBJECT_CLASS (clutter_backend_win32_parent_class)->dispose (gobject);
if (backend->cogl_context)
{
cogl_object_unref (backend->cogl_context);
backend->cogl_context = NULL;
}
}
static GObject *
@ -185,296 +182,110 @@ clutter_backend_win32_constructor (GType gtype,
return g_object_ref (backend_singleton);
}
static gboolean
check_vblank_env (const char *name)
{
return clutter_vblank_name && !g_ascii_strcasecmp (clutter_vblank_name, name);
}
ClutterFeatureFlags
clutter_backend_win32_get_features (ClutterBackend *backend)
{
ClutterBackendClass *parent_class;
ClutterFeatureFlags flags;
const gchar *extensions;
SwapIntervalProc swap_interval;
ClutterBackendWin32 *backend_win32;
/* this will make sure that the GL context exists and is bound to a
drawable */
backend_win32 = CLUTTER_BACKEND_WIN32 (backend);
g_return_val_if_fail (backend_win32->gl_context != NULL, 0);
g_return_val_if_fail (wglGetCurrentDC () != NULL, 0);
parent_class = CLUTTER_BACKEND_CLASS (clutter_backend_win32_parent_class);
extensions = (const gchar *) glGetString (GL_EXTENSIONS);
flags = CLUTTER_FEATURE_STAGE_USER_RESIZE | CLUTTER_FEATURE_STAGE_CURSOR;
CLUTTER_NOTE (BACKEND,
"Checking features\n"
" GL_VENDOR: %s\n"
" GL_RENDERER: %s\n"
" GL_VERSION: %s\n"
" GL_EXTENSIONS: %s\n",
glGetString (GL_VENDOR),
glGetString (GL_RENDERER),
glGetString (GL_VERSION),
extensions);
flags = CLUTTER_FEATURE_STAGE_USER_RESIZE
| CLUTTER_FEATURE_STAGE_CURSOR
| CLUTTER_FEATURE_STAGE_MULTIPLE;
/* If the VBlank should be left at the default or it has been
disabled elsewhere (eg NVIDIA) then don't bother trying to check
for the swap control extension */
if (getenv ("__GL_SYNC_TO_VBLANK") || check_vblank_env ("default"))
CLUTTER_NOTE (BACKEND, "vblank sync: left at default at user request");
else if (cogl_clutter_check_extension ("WGL_EXT_swap_control", extensions)
&& (swap_interval = (SwapIntervalProc)
wglGetProcAddress ((LPCSTR) "wglSwapIntervalEXT")))
if (cogl_clutter_winsys_has_feature (COGL_WINSYS_FEATURE_MULTIPLE_ONSCREEN))
{
/* According to the specification for the WGL_EXT_swap_control
extension the default swap interval is 1 anyway, so if no
vblank is requested then we should explicitly set it to
zero */
if (check_vblank_env ("none"))
{
if (swap_interval (0))
CLUTTER_NOTE (BACKEND, "vblank sync: successfully disabled");
else
CLUTTER_NOTE (BACKEND, "vblank sync: disabling failed");
CLUTTER_NOTE (BACKEND, "Cogl supports multiple onscreen framebuffers");
flags |= CLUTTER_FEATURE_STAGE_MULTIPLE;
}
else
{
if (swap_interval (1))
CLUTTER_NOTE (BACKEND, "Cogl only supports one onscreen framebuffer");
flags |= CLUTTER_FEATURE_STAGE_STATIC;
}
if (cogl_clutter_winsys_has_feature (COGL_WINSYS_FEATURE_SWAP_THROTTLE))
{
CLUTTER_NOTE (BACKEND, "Cogl supports swap buffers throttling");
flags |= CLUTTER_FEATURE_SYNC_TO_VBLANK;
CLUTTER_NOTE (BACKEND, "vblank sync: wglSwapIntervalEXT "
"vblank setup success");
}
else
CLUTTER_NOTE (BACKEND, "vblank sync: wglSwapIntervalEXT "
"vblank setup failed");
}
}
else
CLUTTER_NOTE (BACKEND, "no use-able vblank mechanism found");
CLUTTER_NOTE (BACKEND, "Cogl doesn't support swap buffers throttling");
CLUTTER_NOTE (BACKEND, "backend features checked");
return flags;
}
static ATOM
clutter_backend_win32_get_dummy_window_class ()
{
static ATOM klass = 0;
if (klass == 0)
{
WNDCLASSW wndclass;
memset (&wndclass, 0, sizeof (wndclass));
wndclass.lpfnWndProc = DefWindowProc;
wndclass.hInstance = GetModuleHandleW (NULL);
wndclass.lpszClassName = L"ClutterBackendWin32DummyWindow";
klass = RegisterClassW (&wndclass);
}
return klass;
}
static gboolean
clutter_backend_win32_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
clutter_backend_win32_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 Clutter */
&& ((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
|| clutter_backend_win32_pixel_format_is_better (&best_pfd, pfd)))
{
best_pf = i;
best_pfd = *pfd;
}
}
*pfd = best_pfd;
return best_pf;
}
static gboolean
clutter_backend_win32_create_context (ClutterBackend *backend,
GError **error)
{
ClutterBackendWin32 *backend_win32 = CLUTTER_BACKEND_WIN32 (backend);
CoglSwapChain *swap_chain;
CoglOnscreenTemplate *onscreen_template;
/* 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 stage is available
*/
if (backend_win32->dummy_hwnd == NULL)
{
ATOM window_class = clutter_backend_win32_get_dummy_window_class ();
if (backend->cogl_context)
return TRUE;
if (window_class == 0)
{
g_critical ("Unable to register window class");
return FALSE;
}
backend->cogl_renderer = cogl_renderer_new ();
if (!cogl_renderer_connect (backend->cogl_renderer, error))
goto error;
backend_win32->dummy_hwnd =
CreateWindowW ((LPWSTR) MAKEINTATOM (window_class),
L".",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
1, 1,
NULL, NULL,
GetModuleHandle (NULL),
NULL);
swap_chain = cogl_swap_chain_new ();
if (backend_win32->dummy_hwnd == NULL)
{
g_critical ("Unable to create dummy window");
return FALSE;
}
}
onscreen_template = cogl_onscreen_template_new (swap_chain);
cogl_object_unref (swap_chain);
if (backend_win32->dummy_dc == NULL)
{
PIXELFORMATDESCRIPTOR pfd;
int pf;
if (!cogl_renderer_check_onscreen_template (backend->cogl_renderer,
onscreen_template,
error))
goto error;
backend_win32->dummy_dc = GetDC (backend_win32->dummy_hwnd);
backend->cogl_display = cogl_display_new (backend->cogl_renderer,
onscreen_template);
cogl_object_unref (backend->cogl_renderer);
cogl_object_unref (onscreen_template);
pf = clutter_backend_win32_choose_pixel_format (backend_win32->dummy_dc,
&pfd);
if (!cogl_display_setup (backend->cogl_display, error))
goto error;
if (pf == 0 || !SetPixelFormat (backend_win32->dummy_dc, pf, &pfd))
{
g_critical ("Unable to find suitable GL pixel format");
ReleaseDC (backend_win32->dummy_hwnd, backend_win32->dummy_dc);
backend_win32->dummy_dc = NULL;
return FALSE;
}
}
backend->cogl_context = cogl_context_new (backend->cogl_display, error);
if (!backend->cogl_context)
goto error;
if (backend_win32->gl_context == NULL)
{
backend_win32->gl_context = wglCreateContext (backend_win32->dummy_dc);
if (backend_win32->gl_context == NULL)
{
g_critical ("Unable to create suitable GL context");
return FALSE;
}
}
CLUTTER_NOTE (BACKEND, "Selecting dummy 0x%x for the WGL context",
(unsigned int) backend_win32->dummy_hwnd);
wglMakeCurrent (backend_win32->dummy_dc, backend_win32->gl_context);
/* XXX: eventually this should go away but a lot of Cogl code still
* depends on a global default context. */
cogl_set_default_context (backend->cogl_context);
return TRUE;
error:
if (backend->cogl_display)
{
cogl_object_unref (backend->cogl_display);
backend->cogl_display = NULL;
}
if (onscreen_template)
cogl_object_unref (onscreen_template);
if (swap_chain)
cogl_object_unref (swap_chain);
if (backend->cogl_renderer)
{
cogl_object_unref (backend->cogl_renderer);
backend->cogl_renderer = NULL;
}
return FALSE;
}
static void
clutter_backend_win32_ensure_context (ClutterBackend *backend,
ClutterStage *stage)
{
ClutterStageWindow *impl;
ClutterStageWin32 *stage_win32 =
CLUTTER_STAGE_WIN32 (_clutter_stage_get_window (stage));
if (stage == NULL ||
CLUTTER_ACTOR_IN_DESTRUCTION (stage) ||
((impl = _clutter_stage_get_window (stage)) == NULL))
{
CLUTTER_NOTE (MULTISTAGE, "Clearing all context");
wglMakeCurrent (NULL, NULL);
}
else
{
ClutterBackendWin32 *backend_win32;
ClutterStageWin32 *stage_win32;
g_return_if_fail (impl != NULL);
CLUTTER_NOTE (MULTISTAGE, "Setting context for stage of type %s [%p]",
g_type_name (G_OBJECT_TYPE (impl)),
impl);
backend_win32 = CLUTTER_BACKEND_WIN32 (backend);
stage_win32 = CLUTTER_STAGE_WIN32 (impl);
/* no GL context to set */
if (backend_win32->gl_context == NULL)
return;
/* we might get here inside the final dispose cycle, so we
* need to handle this gracefully
*/
if (stage_win32->client_dc == NULL)
{
CLUTTER_NOTE (MULTISTAGE,
"Received a stale stage, clearing all context");
if (backend_win32->dummy_dc != NULL)
wglMakeCurrent (backend_win32->dummy_dc,
backend_win32->gl_context);
else
wglMakeCurrent (NULL, NULL);
}
else
{
CLUTTER_NOTE (BACKEND,
"MakeCurrent window %p (%s), context %p",
stage_win32->hwnd,
stage_win32->is_foreign_win ? "foreign" : "native",
backend_win32->gl_context);
wglMakeCurrent (stage_win32->client_dc,
backend_win32->gl_context);
}
}
cogl_set_framebuffer (COGL_FRAMEBUFFER (stage_win32->onscreen));
}
static ClutterStageWindow *
@ -558,7 +369,6 @@ clutter_backend_win32_class_init (ClutterBackendWin32Class *klass)
static void
clutter_backend_win32_init (ClutterBackendWin32 *backend_win32)
{
backend_win32->gl_context = NULL;
backend_win32->invisible_cursor = NULL;
/* FIXME: get from GetSystemMetric?

6
clutter/win32/clutter-backend-win32.h
View File

@ -46,10 +46,6 @@ struct _ClutterBackendWin32
{
ClutterBackend parent_instance;
HGLRC gl_context;
HWND dummy_hwnd;
HDC dummy_dc;
HCURSOR invisible_cursor;
GSource *event_source;
@ -76,6 +72,8 @@ clutter_backend_win32_get_features (ClutterBackend *backend);
HCURSOR _clutter_backend_win32_get_invisible_cursor (ClutterBackend *backend);
G_CONST_RETURN gchar *_clutter_backend_win32_get_vblank (void);
G_END_DECLS
#endif /* __CLUTTER_BACKEND_WIN32_H__ */

8
clutter/win32/clutter-event-win32.c
View File

@ -348,6 +348,7 @@ get_key_modifier_state (const BYTE *key_states)
gboolean
clutter_win32_handle_event (const MSG *msg)
{
ClutterBackend *backend;
ClutterBackendWin32 *backend_win32;
ClutterStageWin32 *stage_win32;
ClutterDeviceManager *manager;
@ -365,6 +366,13 @@ clutter_win32_handle_event (const MSG *msg)
impl = _clutter_stage_get_window (stage);
stage_win32 = CLUTTER_STAGE_WIN32 (impl);
backend_win32 = stage_win32->backend;
backend = CLUTTER_BACKEND (backend_win32);
/* Give Cogl a chance to handle the message first */
if (backend->cogl_renderer != NULL &&
cogl_renderer_handle_native_event (backend->cogl_renderer,
(void *) msg) == COGL_FILTER_REMOVE)
return TRUE;
manager = clutter_device_manager_get_default ();
core_pointer =

57
clutter/win32/clutter-stage-win32.c
View File

@ -392,14 +392,24 @@ static gboolean
clutter_stage_win32_realize (ClutterStageWindow *stage_window)
{
ClutterStageWin32 *stage_win32 = CLUTTER_STAGE_WIN32 (stage_window);
ClutterBackend *backend;
ClutterBackendWin32 *backend_win32;
PIXELFORMATDESCRIPTOR pfd;
int pf;
CoglFramebuffer *framebuffer;
gfloat width;
gfloat height;
GError *error = NULL;
const char *clutter_vblank;
CLUTTER_NOTE (MISC, "Realizing main stage");
backend_win32 = CLUTTER_BACKEND_WIN32 (clutter_get_default_backend ());
backend = CLUTTER_BACKEND (stage_win32->backend);
backend_win32 = CLUTTER_BACKEND_WIN32 (backend);
clutter_actor_get_size (CLUTTER_ACTOR (stage_win32->wrapper),
&width, &height);
stage_win32->onscreen = cogl_onscreen_new (backend->cogl_context,
width, height);
if (stage_win32->hwnd == NULL)
{
@ -457,10 +467,22 @@ clutter_stage_win32_realize (ClutterStageWindow *stage_window)
SetWindowLongPtrW (stage_win32->hwnd, 0, (LONG_PTR) stage_win32);
}
if (stage_win32->client_dc)
ReleaseDC (stage_win32->hwnd, stage_win32->client_dc);
cogl_onscreen_win32_set_foreign_window (stage_win32->onscreen,
stage_win32->hwnd);
stage_win32->client_dc = GetDC (stage_win32->hwnd);
clutter_vblank = _clutter_backend_win32_get_vblank ();
if (clutter_vblank && strcmp (clutter_vblank, "none") == 0)
cogl_onscreen_set_swap_throttled (stage_win32->onscreen, FALSE);
framebuffer = COGL_FRAMEBUFFER (stage_win32->onscreen);
if (!cogl_framebuffer_allocate (framebuffer, &error))
{
g_warning ("Failed to allocate stage: %s", error->message);
g_error_free (error);
cogl_object_unref (stage_win32->onscreen);
stage_win32->onscreen = NULL;
goto fail;
}
/* Create a context. This will be a no-op if we already have one */
if (!_clutter_backend_create_context (CLUTTER_BACKEND (backend_win32),
@ -471,15 +493,6 @@ clutter_stage_win32_realize (ClutterStageWindow *stage_window)
goto fail;
}
/* Use the same pixel format as the dummy DC */
pf = GetPixelFormat (backend_win32->dummy_dc);
DescribePixelFormat (backend_win32->dummy_dc, pf, sizeof (pfd), &pfd);
if (!SetPixelFormat (stage_win32->client_dc, pf, &pfd))
{
g_critical ("Unable to find suitable GL pixel format");
goto fail;
}
CLUTTER_NOTE (BACKEND, "Successfully realized stage");
return TRUE;
@ -491,12 +504,6 @@ clutter_stage_win32_realize (ClutterStageWindow *stage_window)
static void
clutter_stage_win32_unprepare_window (ClutterStageWin32 *stage_win32)
{
if (stage_win32->client_dc)
{
ReleaseDC (stage_win32->hwnd, stage_win32->client_dc);
stage_win32->client_dc = NULL;
}
if (!stage_win32->is_foreign_win && stage_win32->hwnd)
{
/* Drop the pointer to this stage in the window so that any
@ -527,8 +534,8 @@ clutter_stage_win32_redraw (ClutterStageWindow *stage_window)
_clutter_stage_do_paint (stage_win32->wrapper, NULL);
cogl_flush ();
if (stage_win32->client_dc)
SwapBuffers (stage_win32->client_dc);
if (stage_win32->onscreen)
cogl_framebuffer_swap_buffers (COGL_FRAMEBUFFER (stage_win32->onscreen));
}
static void
@ -543,7 +550,10 @@ clutter_stage_win32_dispose (GObject *gobject)
clutter_stage_win32_unprepare_window (stage_win32);
if (stage_win32->wtitle)
{
g_free (stage_win32->wtitle);
stage_win32->wtitle = NULL;
}
G_OBJECT_CLASS (clutter_stage_win32_parent_class)->dispose (gobject);
}
@ -560,7 +570,6 @@ static void
clutter_stage_win32_init (ClutterStageWin32 *stage)
{
stage->hwnd = NULL;
stage->client_dc = NULL;
stage->win_width = 640;
stage->win_height = 480;
stage->backend = NULL;

3
clutter/win32/clutter-stage-win32.h
View File

@ -44,8 +44,9 @@ struct _ClutterStageWin32
{
ClutterGroup parent_instance;
CoglOnscreen *onscreen;
HWND hwnd;
HDC client_dc;
gint win_width;
gint win_height;
gint scroll_pos;