gtk/gdk/quartz/gdkdrawable-quartz.c
2010-09-26 15:11:43 +02:00

248 lines
7.0 KiB
C

/* gdkdrawable-quartz.c
*
* Copyright (C) 2005-2007 Imendio AB
*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <sys/time.h>
#include <cairo-quartz.h>
#include "gdkprivate-quartz.h"
static gpointer parent_class;
static cairo_user_data_key_t gdk_quartz_cairo_key;
typedef struct {
GdkDrawable *drawable;
CGContextRef cg_context;
} GdkQuartzCairoSurfaceData;
gboolean
_gdk_windowing_set_cairo_surface_size (cairo_surface_t *surface,
int width,
int height)
{
/* This is not supported with quartz surfaces. */
return FALSE;
}
static void
gdk_quartz_cairo_surface_destroy (void *data)
{
GdkQuartzCairoSurfaceData *surface_data = data;
GdkDrawableImplQuartz *impl = GDK_DRAWABLE_IMPL_QUARTZ (surface_data->drawable);
impl->cairo_surface = NULL;
gdk_quartz_drawable_release_context (surface_data->drawable,
surface_data->cg_context);
g_free (surface_data);
}
static cairo_surface_t *
gdk_quartz_create_cairo_surface (GdkDrawable *drawable,
int width,
int height)
{
CGContextRef cg_context;
GdkQuartzCairoSurfaceData *surface_data;
cairo_surface_t *surface;
cg_context = gdk_quartz_drawable_get_context (drawable, TRUE);
if (!cg_context)
return NULL;
surface_data = g_new (GdkQuartzCairoSurfaceData, 1);
surface_data->drawable = drawable;
surface_data->cg_context = cg_context;
surface = cairo_quartz_surface_create_for_cg_context (cg_context,
width, height);
cairo_surface_set_user_data (surface, &gdk_quartz_cairo_key,
surface_data,
gdk_quartz_cairo_surface_destroy);
return surface;
}
static cairo_surface_t *
gdk_quartz_ref_cairo_surface (GdkDrawable *drawable)
{
GdkDrawableImplQuartz *impl = GDK_DRAWABLE_IMPL_QUARTZ (drawable);
if (GDK_IS_WINDOW_IMPL_QUARTZ (drawable) &&
GDK_WINDOW_DESTROYED (impl->wrapper))
return NULL;
if (!impl->cairo_surface)
{
impl->cairo_surface =
gdk_quartz_create_cairo_surface (drawable,
gdk_window_get_width (impl->wrapper),
gdk_window_get_height (impl->wrapper));
}
else
cairo_surface_reference (impl->cairo_surface);
return impl->cairo_surface;
}
static void
gdk_drawable_impl_quartz_finalize (GObject *object)
{
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gdk_drawable_impl_quartz_class_init (GdkDrawableImplQuartzClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GdkDrawableClass *drawable_class = GDK_DRAWABLE_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gdk_drawable_impl_quartz_finalize;
drawable_class->ref_cairo_surface = gdk_quartz_ref_cairo_surface;
drawable_class->create_cairo_surface = gdk_quartz_create_cairo_surface;
}
GType
gdk_drawable_impl_quartz_get_type (void)
{
static GType object_type = 0;
if (!object_type)
{
const GTypeInfo object_info =
{
sizeof (GdkDrawableImplQuartzClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gdk_drawable_impl_quartz_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GdkDrawableImplQuartz),
0, /* n_preallocs */
(GInstanceInitFunc) NULL,
};
object_type = g_type_register_static (GDK_TYPE_DRAWABLE,
"GdkDrawableImplQuartz",
&object_info, 0);
}
return object_type;
}
CGContextRef
gdk_quartz_drawable_get_context (GdkDrawable *drawable,
gboolean antialias)
{
if (!GDK_DRAWABLE_IMPL_QUARTZ_GET_CLASS (drawable)->get_context)
{
g_warning ("%s doesn't implement GdkDrawableImplQuartzClass::get_context()",
G_OBJECT_TYPE_NAME (drawable));
return NULL;
}
return GDK_DRAWABLE_IMPL_QUARTZ_GET_CLASS (drawable)->get_context (drawable, antialias);
}
/* 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
* outside of expose calls to less than some frequency when measured over
* the last 4 flushes. This is a bit arbitray, but seems to make it possible
* for some quick manual flushes (such as gtkruler or gimp's marching ants)
* without hitting the max flush frequency.
*
* If drawable NULL, no flushing is done, only registering that a flush was
* done externally.
*/
void
_gdk_quartz_drawable_flush (GdkDrawable *drawable)
{
static struct timeval prev_tv;
static gint intervals[4];
static gint index;
struct timeval tv;
gint ms;
gettimeofday (&tv, NULL);
ms = (tv.tv_sec - prev_tv.tv_sec) * 1000 + (tv.tv_usec - prev_tv.tv_usec) / 1000;
intervals[index++ % 4] = ms;
if (drawable)
{
ms = intervals[0] + intervals[1] + intervals[2] + intervals[3];
/* ~25Hz on average. */
if (ms > 4*40)
{
if (GDK_IS_WINDOW_IMPL_QUARTZ (drawable))
{
GdkWindowImplQuartz *window_impl = GDK_WINDOW_IMPL_QUARTZ (drawable);
[window_impl->toplevel flushWindow];
}
prev_tv = tv;
}
}
else
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)
{
GdkDrawableImplQuartz *impl = GDK_DRAWABLE_IMPL_QUARTZ (drawable);
if (impl->cairo_surface)
{
cairo_surface_finish (impl->cairo_surface);
cairo_surface_set_user_data (impl->cairo_surface, &gdk_quartz_cairo_key,
NULL, NULL);
impl->cairo_surface = NULL;
}
}