/* 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;
void
_gdk_windowing_set_cairo_surface_size (cairo_surface_t *surface,
int width,
int height)
{
/* This is not supported with quartz surfaces. */
}
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);
}
cairo_surface_t *
_gdk_windowing_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)
{
int width, height;
gdk_drawable_get_size (drawable, &width, &height);
impl->cairo_surface = _gdk_windowing_create_cairo_surface (drawable,
width, height);
}
else
cairo_surface_reference (impl->cairo_surface);
return impl->cairo_surface;
}
static void
gdk_quartz_set_colormap (GdkDrawable *drawable,
GdkColormap *colormap)
{
GdkDrawableImplQuartz *impl = GDK_DRAWABLE_IMPL_QUARTZ (drawable);
if (impl->colormap == colormap)
return;
if (impl->colormap)
g_object_unref (impl->colormap);
impl->colormap = colormap;
if (impl->colormap)
g_object_ref (impl->colormap);
}
static GdkColormap*
gdk_quartz_get_colormap (GdkDrawable *drawable)
{
return GDK_DRAWABLE_IMPL_QUARTZ (drawable)->colormap;
}
static GdkScreen*
gdk_quartz_get_screen (GdkDrawable *drawable)
{
return _gdk_screen;
}
static GdkVisual*
gdk_quartz_get_visual (GdkDrawable *drawable)
{
return gdk_drawable_get_visual (GDK_DRAWABLE_IMPL_QUARTZ (drawable)->wrapper);
}
static int
gdk_quartz_get_depth (GdkDrawable *drawable)
{
/* This is a bit bogus but I'm not sure the other way is better */
return gdk_drawable_get_depth (GDK_DRAWABLE_IMPL_QUARTZ (drawable)->wrapper);
}
static void
gdk_quartz_draw_rectangle (GdkDrawable *drawable,
GdkGC *gc,
gboolean filled,
gint x,
gint y,
gint width,
gint height)
{
CGContextRef context = gdk_quartz_drawable_get_context (drawable, FALSE);
if (!context)
return;
if(!_gdk_quartz_gc_update_cg_context (gc,
drawable,
context,
filled ?
GDK_QUARTZ_CONTEXT_FILL :
GDK_QUARTZ_CONTEXT_STROKE))
{
gdk_quartz_drawable_release_context (drawable, context);
return;
}
if (filled)
{
CGRect rect = CGRectMake (x, y, width, height);
CGContextFillRect (context, rect);
}
else
{
CGRect rect = CGRectMake (x + 0.5, y + 0.5, width, height);
CGContextStrokeRect (context, rect);
}
gdk_quartz_drawable_release_context (drawable, context);
}
static void
gdk_quartz_draw_arc (GdkDrawable *drawable,
GdkGC *gc,
gboolean filled,
gint x,
gint y,
gint width,
gint height,
gint angle1,
gint angle2)
{
CGContextRef context = gdk_quartz_drawable_get_context (drawable, FALSE);
float start_angle, end_angle;
gboolean clockwise = FALSE;
if (!context)
return;
if (!_gdk_quartz_gc_update_cg_context (gc, drawable, context,
filled ?
GDK_QUARTZ_CONTEXT_FILL :
GDK_QUARTZ_CONTEXT_STROKE))
{
gdk_quartz_drawable_release_context (drawable, context);
return;
}
start_angle = angle1 * 2.0 * G_PI / 360.0 / 64.0;
end_angle = start_angle + angle2 * 2.0 * G_PI / 360.0 / 64.0;
/* angle2 is relative to angle1 and can be negative, which switches
* the drawing direction
*/
if (angle2 < 0)
clockwise = TRUE;
/* below, flip the coordinate system back to its original y-diretion
* so the angles passed to CGContextAddArc() are interpreted as
* expected
*
* FIXME: the implementation below works only for perfect circles
* (width == height). Any other aspect ratio either scales the
* line width unevenly or scales away the path entirely for very
* small line widths (esp. for line_width == 0, which is a hair
* line on X11 but must be approximated with the thinnest possible
* line on quartz).
*/
if (filled)
{
CGContextTranslateCTM (context,
x + width / 2.0,
y + height / 2.0);
CGContextScaleCTM (context, 1.0, - (double)height / (double)width);
CGContextMoveToPoint (context, 0, 0);
CGContextAddArc (context, 0, 0, width / 2.0,
start_angle, end_angle,
clockwise);
CGContextClosePath (context);
CGContextFillPath (context);
}
else
{
CGContextTranslateCTM (context,
x + width / 2.0 + 0.5,
y + height / 2.0 + 0.5);
CGContextScaleCTM (context, 1.0, - (double)height / (double)width);
CGContextAddArc (context, 0, 0, width / 2.0,
start_angle, end_angle,
clockwise);
CGContextStrokePath (context);
}
gdk_quartz_drawable_release_context (drawable, context);
}
static void
gdk_quartz_draw_polygon (GdkDrawable *drawable,
GdkGC *gc,
gboolean filled,
GdkPoint *points,
gint npoints)
{
CGContextRef context = gdk_quartz_drawable_get_context (drawable, FALSE);
int i;
if (!context)
return;
if (!_gdk_quartz_gc_update_cg_context (gc, drawable, context,
filled ?
GDK_QUARTZ_CONTEXT_FILL :
GDK_QUARTZ_CONTEXT_STROKE))
{
gdk_quartz_drawable_release_context (drawable, context);
return;
}
if (filled)
{
CGContextMoveToPoint (context, points[0].x, points[0].y);
for (i = 1; i < npoints; i++)
CGContextAddLineToPoint (context, points[i].x, points[i].y);
CGContextClosePath (context);
CGContextFillPath (context);
}
else
{
CGContextMoveToPoint (context, points[0].x + 0.5, points[0].y + 0.5);
for (i = 1; i < npoints; i++)
CGContextAddLineToPoint (context, points[i].x + 0.5, points[i].y + 0.5);
CGContextClosePath (context);
CGContextStrokePath (context);
}
gdk_quartz_drawable_release_context (drawable, context);
}
static void
gdk_quartz_draw_text (GdkDrawable *drawable,
GdkFont *font,
GdkGC *gc,
gint x,
gint y,
const gchar *text,
gint text_length)
{
/* FIXME: Implement */
}
static void
gdk_quartz_draw_text_wc (GdkDrawable *drawable,
GdkFont *font,
GdkGC *gc,
gint x,
gint y,
const GdkWChar *text,
gint text_length)
{
/* FIXME: Implement */
}
static void
gdk_quartz_draw_drawable (GdkDrawable *drawable,
GdkGC *gc,
GdkPixmap *src,
gint xsrc,
gint ysrc,
gint xdest,
gint ydest,
gint width,
gint height,
GdkDrawable *original_src)
{
int src_depth = gdk_drawable_get_depth (src);
int dest_depth = gdk_drawable_get_depth (drawable);
GdkDrawableImplQuartz *src_impl;
if (GDK_IS_WINDOW_IMPL_QUARTZ (src))
{
GdkWindowImplQuartz *window_impl;
window_impl = GDK_WINDOW_IMPL_QUARTZ (src);
/* We do support moving areas on the same drawable, if it can be done
* by using a scroll. FIXME: We need to check that the params support
* this hack, and make sure it's done properly with any offsets etc?
*/
if (drawable == (GdkDrawable *)window_impl)
{
NSRect rect = NSMakeRect (xsrc, ysrc, width, height);
NSSize offset = NSMakeSize (xdest - xsrc, ydest - ysrc);
GdkRectangle tmp_rect;
GdkRegion *orig_region, *offset_region, *need_display_region;
GdkWindow *window = GDK_DRAWABLE_IMPL_QUARTZ (drawable)->wrapper;
/* Origin region */
tmp_rect.x = xsrc;
tmp_rect.y = ysrc;
tmp_rect.width = width;
tmp_rect.height = height;
orig_region = gdk_region_rectangle (&tmp_rect);
/* Destination region (or the offset region) */
offset_region = gdk_region_copy (orig_region);
gdk_region_offset (offset_region, offset.width, offset.height);
need_display_region = gdk_region_copy (orig_region);
if (window_impl->in_paint_rect_count == 0)
{
GdkRegion *bottom_border_region;
/* If we are not in drawRect:, we can use scrollRect:.
* We apply scrollRect on the rectangle to be moved and
* subtract this area from the rectangle that needs display.
*
* Note: any area in this moved region that already needed
* display will be handled by GDK (queue translation).
*
* Queuing the redraw below is important, otherwise the
* results from scrollRect will not take effect!
*/
[window_impl->view scrollRect:rect by:offset];
gdk_region_subtract (need_display_region, offset_region);
/* Here we take special care with the bottom window border,
* which extents 4 pixels and typically draws rounded corners.
*/
tmp_rect.x = 0;
tmp_rect.y = gdk_window_get_height (window) - 4;
tmp_rect.width = gdk_window_get_width (window);
tmp_rect.height = 4;
if (gdk_region_rect_in (offset_region, &tmp_rect) !=
GDK_OVERLAP_RECTANGLE_OUT)
{
/* We are copying pixels to the bottom border, we need
* to submit this area for redisplay to get the rounded
* corners drawn.
*/
gdk_region_union_with_rect (need_display_region,
&tmp_rect);
}
/* Compute whether the bottom border is moved elsewhere.
* Because this part will have rounded corners, we have
* to fill the contents of where the rounded corners used
* to be. We post this area for redisplay.
*/
bottom_border_region = gdk_region_rectangle (&tmp_rect);
gdk_region_intersect (bottom_border_region,
orig_region);
gdk_region_offset (bottom_border_region,
offset.width, offset.height);
gdk_region_union (need_display_region, bottom_border_region);
gdk_region_destroy (bottom_border_region);
}
else
{
/* If we cannot handle things with a scroll, we must redisplay
* the union of the source area and the destination area.
*/
gdk_region_union (need_display_region, offset_region);
}
_gdk_quartz_window_set_needs_display_in_region (window,
need_display_region);
gdk_region_destroy (orig_region);
gdk_region_destroy (offset_region);
gdk_region_destroy (need_display_region);
}
else
g_warning ("Drawing with window source != dest is not supported");
return;
}
else if (GDK_IS_DRAWABLE_IMPL_QUARTZ (src))
src_impl = GDK_DRAWABLE_IMPL_QUARTZ (src);
else if (GDK_IS_PIXMAP (src))
src_impl = GDK_DRAWABLE_IMPL_QUARTZ (GDK_PIXMAP_OBJECT (src)->impl);
else
{
g_warning ("Unsupported source %s", G_OBJECT_TYPE_NAME (src));
return;
}
/* Handle drawable and pixmap sources. */
if (src_depth == 1)
{
/* FIXME: src depth 1 is not supported yet */
g_warning ("Source with depth 1 unsupported");
}
else if (dest_depth != 0 && src_depth == dest_depth)
{
GdkPixmapImplQuartz *pixmap_impl = GDK_PIXMAP_IMPL_QUARTZ (src_impl);
CGContextRef context = gdk_quartz_drawable_get_context (drawable, FALSE);
CGImageRef image;
if (!context)
return;
if (!_gdk_quartz_gc_update_cg_context (gc, drawable, context,
GDK_QUARTZ_CONTEXT_STROKE))
{
gdk_quartz_drawable_release_context (drawable, context);
return;
}
CGContextClipToRect (context, CGRectMake (xdest, ydest, width, height));
CGContextTranslateCTM (context, xdest - xsrc, ydest - ysrc +
pixmap_impl->height);
CGContextScaleCTM (context, 1.0, -1.0);
image = _gdk_pixmap_get_cgimage (src);
CGContextDrawImage (context,
CGRectMake (0, 0, pixmap_impl->width, pixmap_impl->height),
image);
CGImageRelease (image);
gdk_quartz_drawable_release_context (drawable, context);
}
else
g_warning ("Attempt to draw a drawable with depth %d to a drawable with depth %d",
src_depth, dest_depth);
}
static void
gdk_quartz_draw_points (GdkDrawable *drawable,
GdkGC *gc,
GdkPoint *points,
gint npoints)
{
CGContextRef context = gdk_quartz_drawable_get_context (drawable, FALSE);
int i;
if (!context)
return;
if (!_gdk_quartz_gc_update_cg_context (gc, drawable, context,
GDK_QUARTZ_CONTEXT_STROKE |
GDK_QUARTZ_CONTEXT_FILL))
{
gdk_quartz_drawable_release_context (drawable, context);
return;
}
/* Just draw 1x1 rectangles */
for (i = 0; i < npoints; i++)
{
CGRect rect = CGRectMake (points[i].x, points[i].y, 1, 1);
CGContextFillRect (context, rect);
}
gdk_quartz_drawable_release_context (drawable, context);
}
static inline void
gdk_quartz_fix_cap_not_last_line (GdkGCQuartz *private,
gint x1,
gint y1,
gint x2,
gint y2,
gint *xfix,
gint *yfix)
{
*xfix = 0;
*yfix = 0;
if (private->cap_style == GDK_CAP_NOT_LAST && private->line_width == 0)
{
/* fix only vertical and horizontal lines for now */
if (y1 == y2 && x1 != x2)
{
*xfix = (x1 < x2) ? -1 : 1;
}
else if (x1 == x2 && y1 != y2)
{
*yfix = (y1 < y2) ? -1 : 1;
}
}
}
static void
gdk_quartz_draw_segments (GdkDrawable *drawable,
GdkGC *gc,
GdkSegment *segs,
gint nsegs)
{
CGContextRef context = gdk_quartz_drawable_get_context (drawable, FALSE);
GdkGCQuartz *private;
int i;
if (!context)
return;
private = GDK_GC_QUARTZ (gc);
if (!_gdk_quartz_gc_update_cg_context (gc, drawable, context,
GDK_QUARTZ_CONTEXT_STROKE))
{
gdk_quartz_drawable_release_context (drawable, context);
return;
}
for (i = 0; i < nsegs; i++)
{
gint xfix, yfix;
gdk_quartz_fix_cap_not_last_line (private,
segs[i].x1, segs[i].y1,
segs[i].x2, segs[i].y2,
&xfix, &yfix);
CGContextMoveToPoint (context, segs[i].x1 + 0.5, segs[i].y1 + 0.5);
CGContextAddLineToPoint (context, segs[i].x2 + 0.5 + xfix, segs[i].y2 + 0.5 + yfix);
}
CGContextStrokePath (context);
gdk_quartz_drawable_release_context (drawable, context);
}
static void
gdk_quartz_draw_lines (GdkDrawable *drawable,
GdkGC *gc,
GdkPoint *points,
gint npoints)
{
CGContextRef context = gdk_quartz_drawable_get_context (drawable, FALSE);
GdkGCQuartz *private;
gint xfix, yfix;
gint i;
if (!context)
return;
private = GDK_GC_QUARTZ (gc);
if (!_gdk_quartz_gc_update_cg_context (gc, drawable, context,
GDK_QUARTZ_CONTEXT_STROKE))
{
gdk_quartz_drawable_release_context (drawable, context);
return;
}
CGContextMoveToPoint (context, points[0].x + 0.5, points[0].y + 0.5);
for (i = 1; i < npoints - 1; i++)
CGContextAddLineToPoint (context, points[i].x + 0.5, points[i].y + 0.5);
gdk_quartz_fix_cap_not_last_line (private,
points[npoints - 2].x, points[npoints - 2].y,
points[npoints - 1].x, points[npoints - 1].y,
&xfix, &yfix);
CGContextAddLineToPoint (context,
points[npoints - 1].x + 0.5 + xfix,
points[npoints - 1].y + 0.5 + yfix);
CGContextStrokePath (context);
gdk_quartz_drawable_release_context (drawable, context);
}
static void
gdk_quartz_draw_pixbuf (GdkDrawable *drawable,
GdkGC *gc,
GdkPixbuf *pixbuf,
gint src_x,
gint src_y,
gint dest_x,
gint dest_y,
gint width,
gint height,
GdkRgbDither dither,
gint x_dither,
gint y_dither)
{
CGContextRef context = gdk_quartz_drawable_get_context (drawable, FALSE);
CGColorSpaceRef colorspace;
CGDataProviderRef data_provider;
CGImageRef image;
void *data;
int rowstride, pixbuf_width, pixbuf_height;
gboolean has_alpha;
if (!context)
return;
pixbuf_width = gdk_pixbuf_get_width (pixbuf);
pixbuf_height = gdk_pixbuf_get_height (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
has_alpha = gdk_pixbuf_get_has_alpha (pixbuf);
data = gdk_pixbuf_get_pixels (pixbuf);
colorspace = CGColorSpaceCreateDeviceRGB ();
data_provider = CGDataProviderCreateWithData (NULL, data, pixbuf_height * rowstride, NULL);
image = CGImageCreate (pixbuf_width, pixbuf_height, 8,
has_alpha ? 32 : 24, rowstride,
colorspace,
has_alpha ? kCGImageAlphaLast : 0,
data_provider, NULL, FALSE,
kCGRenderingIntentDefault);
CGDataProviderRelease (data_provider);
CGColorSpaceRelease (colorspace);
if (!_gdk_quartz_gc_update_cg_context (gc, drawable, context,
GDK_QUARTZ_CONTEXT_STROKE))
{
gdk_quartz_drawable_release_context (drawable, context);
return;
}
CGContextClipToRect (context, CGRectMake (dest_x, dest_y, width, height));
CGContextTranslateCTM (context, dest_x - src_x, dest_y - src_y + pixbuf_height);
CGContextScaleCTM (context, 1, -1);
CGContextDrawImage (context, CGRectMake (0, 0, pixbuf_width, pixbuf_height), image);
CGImageRelease (image);
gdk_quartz_drawable_release_context (drawable, context);
}
static void
gdk_quartz_draw_image (GdkDrawable *drawable,
GdkGC *gc,
GdkImage *image,
gint xsrc,
gint ysrc,
gint xdest,
gint ydest,
gint width,
gint height)
{
CGContextRef context = gdk_quartz_drawable_get_context (drawable, FALSE);
CGColorSpaceRef colorspace;
CGDataProviderRef data_provider;
CGImageRef cgimage;
if (!context)
return;
colorspace = CGColorSpaceCreateDeviceRGB ();
data_provider = CGDataProviderCreateWithData (NULL, image->mem, image->height * image->bpl, NULL);
/* FIXME: Make sure that this function draws 32-bit images correctly,
* also check endianness wrt kCGImageAlphaNoneSkipFirst */
cgimage = CGImageCreate (image->width, image->height, 8,
32, image->bpl,
colorspace,
kCGImageAlphaNoneSkipFirst,
data_provider, NULL, FALSE, kCGRenderingIntentDefault);
CGDataProviderRelease (data_provider);
CGColorSpaceRelease (colorspace);
if (!_gdk_quartz_gc_update_cg_context (gc, drawable, context,
GDK_QUARTZ_CONTEXT_STROKE))
{
gdk_quartz_drawable_release_context (drawable, context);
return;
}
CGContextClipToRect (context, CGRectMake (xdest, ydest, width, height));
CGContextTranslateCTM (context, xdest - xsrc, ydest - ysrc + image->height);
CGContextScaleCTM (context, 1, -1);
CGContextDrawImage (context, CGRectMake (0, 0, image->width, image->height), cgimage);
CGImageRelease (cgimage);
gdk_quartz_drawable_release_context (drawable, context);
}
static void
gdk_drawable_impl_quartz_finalize (GObject *object)
{
GdkDrawableImplQuartz *impl = GDK_DRAWABLE_IMPL_QUARTZ (object);
if (impl->colormap)
g_object_unref (impl->colormap);
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->create_gc = _gdk_quartz_gc_new;
drawable_class->draw_rectangle = gdk_quartz_draw_rectangle;
drawable_class->draw_arc = gdk_quartz_draw_arc;
drawable_class->draw_polygon = gdk_quartz_draw_polygon;
drawable_class->draw_text = gdk_quartz_draw_text;
drawable_class->draw_text_wc = gdk_quartz_draw_text_wc;
drawable_class->draw_drawable_with_src = gdk_quartz_draw_drawable;
drawable_class->draw_points = gdk_quartz_draw_points;
drawable_class->draw_segments = gdk_quartz_draw_segments;
drawable_class->draw_lines = gdk_quartz_draw_lines;
drawable_class->draw_image = gdk_quartz_draw_image;
drawable_class->draw_pixbuf = gdk_quartz_draw_pixbuf;
drawable_class->ref_cairo_surface = gdk_quartz_ref_cairo_surface;
drawable_class->set_colormap = gdk_quartz_set_colormap;
drawable_class->get_colormap = gdk_quartz_get_colormap;
drawable_class->get_depth = gdk_quartz_get_depth;
drawable_class->get_screen = gdk_quartz_get_screen;
drawable_class->get_visual = gdk_quartz_get_visual;
drawable_class->_copy_to_image = _gdk_quartz_image_copy_to_image;
}
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];
}
}
else if (GDK_IS_PIXMAP_IMPL_QUARTZ (drawable))
CGContextRelease (cg_context);
}
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;
}
}