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quartz: Emulate root window as 1x1 bitmap

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We subclass GdkWindowImplQuartz into a new GdkRootWindowImplQuartz,
and override the get_context method in order to do this cleanly.
Also made release_context a virtual method, since the root window has
to release its CGContextRef differently compared to normal windows.
This commit is contained in:
Kristian Rietveld 2010-10-04 11:43:16 +02:00
parent 97bdf55b6d
commit 8970b174dc
4 changed files with 138 additions and 21 deletions
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34
gdk/quartz/gdkdrawable-quartz.c
View File

@ -167,6 +167,20 @@ gdk_quartz_drawable_get_context (GdkDrawable *drawable,
return GDK_DRAWABLE_IMPL_QUARTZ_GET_CLASS (drawable)->get_context (drawable, antialias);
}
void
gdk_quartz_drawable_release_context (GdkDrawable *drawable,
CGContextRef cg_context)
{
if (!GDK_DRAWABLE_IMPL_QUARTZ_GET_CLASS (drawable)->release_context)
{
g_warning ("%s doesn't implement GdkDrawableImplQuartzClass::release_context()",
G_OBJECT_TYPE_NAME (drawable));
return;
}
GDK_DRAWABLE_IMPL_QUARTZ_GET_CLASS (drawable)->release_context (drawable, cg_context);
}
/* Help preventing "beam sync penalty" where CG makes all graphics code
* block until the next vsync if we try to flush (including call display on
* a view) too often. We do this by limiting the manual flushing done
@ -212,26 +226,6 @@ _gdk_quartz_drawable_flush (GdkDrawable *drawable)
prev_tv = tv;
}
void
gdk_quartz_drawable_release_context (GdkDrawable *drawable,
CGContextRef cg_context)
{
if (GDK_IS_WINDOW_IMPL_QUARTZ (drawable))
{
GdkWindowImplQuartz *window_impl = GDK_WINDOW_IMPL_QUARTZ (drawable);
CGContextRestoreGState (cg_context);
CGContextSetAllowsAntialiasing (cg_context, TRUE);
/* See comment in gdk_quartz_drawable_get_context(). */
if (window_impl->in_paint_rect_count == 0)
{
_gdk_quartz_drawable_flush (drawable);
[window_impl->view unlockFocus];
}
}
}
void
_gdk_quartz_drawable_finish (GdkDrawable *drawable)
{

2
gdk/quartz/gdkdrawable-quartz.h
View File

@ -56,6 +56,8 @@ struct _GdkDrawableImplQuartzClass
/* vtable */
CGContextRef (*get_context) (GdkDrawable* drawable,
gboolean antialias);
void (*release_context) (GdkDrawable *drawable,
CGContextRef cg_context);
};
GType gdk_drawable_impl_quartz_get_type (void);

96
gdk/quartz/gdkwindow-quartz.c
View File

@ -30,6 +30,7 @@
#include "gdkinputprivate.h"
static gpointer parent_class;
static gpointer root_window_parent_class;
static GSList *update_nswindows;
static gboolean in_process_all_updates = FALSE;
@ -141,6 +142,23 @@ gdk_window_impl_quartz_get_context (GdkDrawable *drawable,
return cg_context;
}
static void
gdk_window_impl_quartz_release_context (GdkDrawable *drawable,
CGContextRef cg_context)
{
GdkWindowImplQuartz *window_impl = GDK_WINDOW_IMPL_QUARTZ (drawable);
CGContextRestoreGState (cg_context);
CGContextSetAllowsAntialiasing (cg_context, TRUE);
/* See comment in gdk_quartz_drawable_get_context(). */
if (window_impl->in_paint_rect_count == 0)
{
_gdk_quartz_drawable_flush (drawable);
[window_impl->view unlockFocus];
}
}
static void
check_grab_unmap (GdkWindow *window)
{
@ -214,6 +232,7 @@ gdk_window_impl_quartz_class_init (GdkWindowImplQuartzClass *klass)
object_class->finalize = gdk_window_impl_quartz_finalize;
drawable_quartz_class->get_context = gdk_window_impl_quartz_get_context;
drawable_quartz_class->release_context = gdk_window_impl_quartz_release_context;
}
static void
@ -1009,7 +1028,7 @@ _gdk_windowing_window_init (void)
_gdk_root = g_object_new (GDK_TYPE_WINDOW, NULL);
private = (GdkWindowObject *)_gdk_root;
private->impl = g_object_new (_gdk_window_impl_get_type (), NULL);
private->impl = g_object_new (_gdk_root_window_impl_quartz_get_type (), NULL);
private->impl_window = private;
private->visual = gdk_screen_get_system_visual (_gdk_screen);
@ -2968,3 +2987,78 @@ gdk_window_impl_iface_init (GdkWindowImplIface *iface)
iface->translate = _gdk_quartz_window_translate;
iface->destroy = _gdk_quartz_window_destroy;
}
static CGContextRef
gdk_root_window_impl_quartz_get_context (GdkDrawable *drawable,
gboolean antialias)
{
GdkDrawableImplQuartz *drawable_impl = GDK_DRAWABLE_IMPL_QUARTZ (drawable);
CGColorSpaceRef colorspace;
CGContextRef cg_context;
if (GDK_WINDOW_DESTROYED (drawable_impl->wrapper))
return NULL;
/* We do not have the notion of a root window on OS X. We fake this
* by creating a 1x1 bitmap and return a context to that.
*/
colorspace = CGColorSpaceCreateWithName (kCGColorSpaceGenericRGB);
cg_context = CGBitmapContextCreate (NULL,
1, 1, 8, 4, colorspace,
kCGImageAlphaPremultipliedLast);
CGColorSpaceRelease (colorspace);
return cg_context;
}
static void
gdk_root_window_impl_quartz_release_context (GdkDrawable *drawable,
CGContextRef cg_context)
{
CGContextRelease (cg_context);
}
static void
gdk_root_window_impl_quartz_class_init (GdkRootWindowImplQuartzClass *klass)
{
GdkDrawableImplQuartzClass *drawable_quartz_class = GDK_DRAWABLE_IMPL_QUARTZ_CLASS (klass);
root_window_parent_class = g_type_class_peek_parent (klass);
drawable_quartz_class->get_context = gdk_root_window_impl_quartz_get_context;
drawable_quartz_class->release_context = gdk_root_window_impl_quartz_release_context;
}
static void
gdk_root_window_impl_quartz_init (GdkRootWindowImplQuartz *impl)
{
}
GType
_gdk_root_window_impl_quartz_get_type (void)
{
static GType object_type = 0;
if (!object_type)
{
const GTypeInfo object_info =
{
sizeof (GdkRootWindowImplQuartzClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gdk_root_window_impl_quartz_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GdkRootWindowImplQuartz),
0, /* n_preallocs */
(GInstanceInitFunc) gdk_root_window_impl_quartz_init,
};
object_type = g_type_register_static (GDK_TYPE_WINDOW_IMPL_QUARTZ,
"GdkRootWindowQuartz",
&object_info, 0);
}
return object_type;
}

27
gdk/quartz/gdkwindow-quartz.h
View File

@ -69,6 +69,33 @@ struct _GdkWindowImplQuartzClass
GType _gdk_window_impl_quartz_get_type (void);
/* Root window implementation for Quartz
*/
typedef struct _GdkRootWindowImplQuartz GdkRootWindowImplQuartz;
typedef struct _GdkRootWindowImplQuartzClass GdkRootWindowImplQuartzClass;
#define GDK_TYPE_ROOT_WINDOW_IMPL_QUARTZ (_gdk_root_window_impl_quartz_get_type ())
#define GDK_ROOT_WINDOW_IMPL_QUARTZ(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), GDK_TYPE_ROOT_WINDOW_IMPL_QUARTZ, GdkRootWindowImplQuartz))
#define GDK_ROOT_WINDOW_IMPL_QUARTZ_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GDK_TYPE_ROOT_WINDOW_IMPL_QUARTZ, GdkRootWindowImplQuartzClass))
#define GDK_IS_ROOT_WINDOW_IMPL_QUARTZ(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), GDK_TYPE_ROOT_WINDOW_IMPL_QUARTZ))
#define GDK_IS_ROOT_WINDOW_IMPL_QUARTZ_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GDK_TYPE_ROOT_WINDOW_IMPL_QUARTZ))
#define GDK_ROOT_WINDOW_IMPL_QUARTZ_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GDK_TYPE_ROOT_WINDOW_IMPL_QUARTZ, GdkRootWindowImplQuartzClass))
struct _GdkRootWindowImplQuartz
{
GdkWindowImplQuartz parent_instance;
};
struct _GdkRootWindowImplQuartzClass
{
GdkWindowImplQuartzClass parent_class;
};
GType _gdk_root_window_impl_quartz_get_type (void);
G_END_DECLS
#endif /* __GDK_WINDOW_QUARTZ_H__ */