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gtk2/gdk/quartz/gdkgc-quartz.c
Michael Natterer 2f50232a42 Implement lots of value setters for GdkGC, based on a heavily modified 
2006-09-21  Michael Natterer  <mitch@imendio.com>

       Implement lots of value setters for GdkGC, based on a heavily
       modified patch from Thomas Broyer (bug #328853):

	* gdk/quartz/gdkcolor-quartz.c: removed functions which set colors
	on the CGContext. Instead, added gdk_quartz_get_rgba_from_pixel()
	which simply returns RGBA values from a GdkColor's pixel value.
	See gdk_quartz_update_context_from_gc() below.

	* gdk/quartz/gdkprivate-quartz.h (struct GdkGCQuartz): added lots
	of members for the newly suppored GC values. Added enum
	GdkQuartzContextValuesMask which is used for setting up the
	CGContext for filling and/or stroking.

	* gdk/quartz/gdkgc-quartz.c (gdk_quartz_gc_get_values)
	(gdk_quartz_gc_set_values)
	(_gdk_windowing_gc_copy): support a lot more GC values.

	(gdk_quartz_update_context_from_gc): added
	GdkQuartzContextValuesMask parameter and set filling/stroking
	parameters accordingly. This function also gained full control
	over the FG and BG colors (they can't be set separately any more).

	The stipple mask part of the patch doesn't work but seems to take
	the right approach and doesn't make things worse, so I applied it.

	Did *not* apply the clipping part of the patch since I don't
	understand it (I don't understand the version in CVS either, but
	it at least works :-)

	* gdk/quartz/gdkdrawable-quartz.c: pass the right masks to
	gdk_quartz_update_context_from_gc() and removed separate color
	setting calls. Some minor fixes.

	* gdk/quartz/gdkwindow-quartz.c
	(gdk_window_impl_quartz_begin_paint_region): set the CGContext's
	fill color manually. We don't have/need a GC here.
2006-09-21 17:05:33 +00:00

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/* gdkgc-quartz.c
*
* Copyright (C) 2005 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 "gdkgc.h"
#include "gdkprivate-quartz.h"
static gpointer parent_class = NULL;
static void
gdk_quartz_gc_get_values (GdkGC *gc,
GdkGCValues *values)
{
GdkGCQuartz *private;
private = GDK_GC_QUARTZ (gc);
values->foreground.pixel = _gdk_gc_get_fg_pixel (gc);
values->background.pixel = _gdk_gc_get_bg_pixel (gc);
values->font = private->font;
values->function = private->function;
values->fill = _gdk_gc_get_fill (gc);
values->tile = _gdk_gc_get_tile (gc);
values->stipple = _gdk_gc_get_stipple (gc);
/* The X11 backend always returns a NULL clip_mask. */
values->clip_mask = NULL;
values->ts_x_origin = gc->ts_x_origin;
values->ts_y_origin = gc->ts_y_origin;
values->clip_x_origin = gc->clip_x_origin;
values->clip_y_origin = gc->clip_y_origin;
values->graphics_exposures = private->graphics_exposures;
values->line_width = private->line_width;
values->line_style = private->line_style;
values->cap_style = private->cap_style;
values->join_style = private->join_style;
}
static void
gdk_quartz_gc_set_values (GdkGC *gc,
GdkGCValues *values,
GdkGCValuesMask mask)
{
GdkGCQuartz *private = GDK_GC_QUARTZ (gc);
if (mask & GDK_GC_FONT)
{
/* FIXME: implement font */
}
if (mask & GDK_GC_FUNCTION)
private->function = values->function;
if (mask & GDK_GC_SUBWINDOW)
private->subwindow_mode = values->subwindow_mode;
if (mask & GDK_GC_EXPOSURES)
private->graphics_exposures = values->graphics_exposures;
if (mask & GDK_GC_CLIP_MASK)
{
private->have_clip_region = FALSE;
private->have_clip_mask = values->clip_mask != NULL;
if (private->clip_mask)
CGImageRelease (private->clip_mask);
if (values->clip_mask)
private->clip_mask = CGImageCreateCopy (GDK_PIXMAP_IMPL_QUARTZ (GDK_PIXMAP_OBJECT (values->clip_mask)->impl)->image);
else
private->clip_mask = NULL;
}
if (mask & GDK_GC_LINE_WIDTH)
private->line_width = values->line_width;
if (mask & GDK_GC_LINE_STYLE)
private->line_style = values->line_style;
if (mask & GDK_GC_CAP_STYLE)
private->line_style = values->line_style;
if (mask & GDK_GC_JOIN_STYLE)
private->join_style = values->join_style;
}
static void
gdk_quartz_gc_set_dashes (GdkGC *gc,
gint dash_offset,
gint8 dash_list[],
gint n)
{
GdkGCQuartz *private = GDK_GC_QUARTZ (gc);
gint i;
private->dash_count = n;
g_free (private->dash_lengths);
private->dash_lengths = g_new (gfloat, n);
for (i = 0; i < n; i++)
private->dash_lengths[i] = (gfloat) dash_list[i];
private->dash_phase = (gfloat) dash_offset;
}
static void
gdk_gc_quartz_finalize (GObject *object)
{
GdkGCQuartz *private = GDK_GC_QUARTZ (object);
if (private->clip_mask)
CGImageRelease (private->clip_mask);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gdk_gc_quartz_class_init (GdkGCQuartzClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GdkGCClass *gc_class = GDK_GC_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gdk_gc_quartz_finalize;
gc_class->get_values = gdk_quartz_gc_get_values;
gc_class->set_values = gdk_quartz_gc_set_values;
gc_class->set_dashes = gdk_quartz_gc_set_dashes;
}
GType
_gdk_gc_quartz_get_type (void)
{
static GType object_type = 0;
if (!object_type)
{
static const GTypeInfo object_info =
{
sizeof (GdkGCQuartzClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gdk_gc_quartz_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GdkGCQuartz),
0, /* n_preallocs */
(GInstanceInitFunc) NULL,
};
object_type = g_type_register_static (GDK_TYPE_GC,
"GdkGCQuartz",
&object_info, 0);
}
return object_type;
}
GdkGC *
_gdk_quartz_gc_new (GdkDrawable *drawable,
GdkGCValues *values,
GdkGCValuesMask values_mask)
{
GdkGC *gc;
gc = g_object_new (GDK_TYPE_GC_QUARTZ, NULL);
_gdk_gc_init (gc, drawable, values, values_mask);
gdk_quartz_gc_set_values (gc, values, values_mask);
return gc;
}
void
_gdk_windowing_gc_set_clip_region (GdkGC *gc,
GdkRegion *region)
{
GdkGCQuartz *private = GDK_GC_QUARTZ (gc);
if ((private->have_clip_region && ! region) || private->have_clip_mask)
{
if (private->clip_mask)
{
CGImageRelease (private->clip_mask);
private->clip_mask = NULL;
}
private->have_clip_mask = FALSE;
}
private->have_clip_region = region != NULL;
gc->clip_x_origin = 0;
gc->clip_y_origin = 0;
}
void
_gdk_windowing_gc_copy (GdkGC *dst_gc,
GdkGC *src_gc)
{
GdkGCQuartz *dst_quartz_gc = GDK_GC_QUARTZ (dst_gc);
GdkGCQuartz *src_quartz_gc = GDK_GC_QUARTZ (src_gc);
if (dst_quartz_gc->font)
gdk_font_unref (dst_quartz_gc->font);
dst_quartz_gc->font = src_quartz_gc->font;
if (dst_quartz_gc->font)
gdk_font_ref (dst_quartz_gc->font);
dst_quartz_gc->function = src_quartz_gc->function;
dst_quartz_gc->subwindow_mode = src_quartz_gc->subwindow_mode;
dst_quartz_gc->graphics_exposures = src_quartz_gc->graphics_exposures;
dst_quartz_gc->have_clip_region = src_quartz_gc->have_clip_region;
dst_quartz_gc->have_clip_mask = src_quartz_gc->have_clip_mask;
if (dst_quartz_gc->clip_mask)
{
CGImageRelease (dst_quartz_gc->clip_mask);
dst_quartz_gc->clip_mask = NULL;
}
if (src_quartz_gc->clip_mask)
dst_quartz_gc->clip_mask =
CGImageCreateCopy (GDK_PIXMAP_IMPL_QUARTZ (GDK_PIXMAP_OBJECT (src_quartz_gc->clip_mask)->impl)->image);
dst_quartz_gc->line_width = src_quartz_gc->line_width;
dst_quartz_gc->line_style = src_quartz_gc->line_style;
dst_quartz_gc->cap_style = src_quartz_gc->cap_style;
dst_quartz_gc->join_style = src_quartz_gc->join_style;
if (dst_quartz_gc->dash_lengths)
g_free (dst_quartz_gc->dash_lengths);
dst_quartz_gc->dash_lengths = g_memdup (src_quartz_gc->dash_lengths,
sizeof (float) * src_quartz_gc->dash_count);
dst_quartz_gc->dash_count = src_quartz_gc->dash_count;
dst_quartz_gc->dash_phase = src_quartz_gc->dash_phase;
}
GdkScreen *
gdk_gc_get_screen (GdkGC *gc)
{
return _gdk_screen;
}
static void
gdk_quartz_draw_tiled_pattern (void *info,
CGContextRef context)
{
GdkGC *gc = GDK_GC (info);
CGImageRef pattern_image;
pattern_image = GDK_PIXMAP_IMPL_QUARTZ (GDK_PIXMAP_OBJECT (_gdk_gc_get_tile (gc))->impl)->image;
CGContextDrawImage (context, CGRectMake (0, 0,
CGImageGetWidth (pattern_image),
CGImageGetHeight (pattern_image)),
pattern_image);
}
static void
gdk_quartz_draw_stippled_pattern (void *info,
CGContextRef context)
{
GdkGC *gc = GDK_GC (info);
CGImageRef pattern_image;
CGRect rect;
gfloat r, g, b, a;
pattern_image = GDK_PIXMAP_IMPL_QUARTZ (GDK_PIXMAP_OBJECT (_gdk_gc_get_stipple (gc))->impl)->image;
rect = CGRectMake (0, 0,
CGImageGetWidth (pattern_image),
CGImageGetHeight (pattern_image));
CGContextClipToMask (context, rect, pattern_image);
gdk_quartz_get_rgba_from_pixel (gc->colormap, _gdk_gc_get_fg_pixel (gc),
&r, &g, &b, &a);
CGContextSetRGBFillColor (context, r, g, b, a);
CGContextFillRect (context, rect);
}
static void
gdk_quartz_draw_opaque_stippled_pattern (void *info,
CGContextRef context)
{
GdkGC *gc = GDK_GC (info);
CGImageRef pattern_image;
CGRect rect;
gfloat r, g, b, a;
pattern_image = GDK_PIXMAP_IMPL_QUARTZ (GDK_PIXMAP_OBJECT (_gdk_gc_get_stipple (gc))->impl)->image;
rect = CGRectMake (0, 0,
CGImageGetWidth (pattern_image),
CGImageGetHeight (pattern_image));
gdk_quartz_get_rgba_from_pixel (gc->colormap, _gdk_gc_get_bg_pixel (gc),
&r, &g, &b, &a);
CGContextSetRGBFillColor (context, r, g, b, a);
CGContextFillRect (context, rect);
CGContextClipToMask (context, rect, pattern_image);
gdk_quartz_get_rgba_from_pixel (gc->colormap, _gdk_gc_get_fg_pixel (gc),
&r, &g, &b, &a);
CGContextSetRGBFillColor (context, r, g, b, a);
CGContextFillRect (context, rect);
}
void
gdk_quartz_update_context_from_gc (CGContextRef context,
GdkGC *gc,
GdkQuartzContextValuesMask mask)
{
GdkGCQuartz *private;
guint32 fg_pixel;
guint32 bg_pixel;
g_return_if_fail (gc == NULL || GDK_IS_GC (gc));
if (!gc)
return;
private = GDK_GC_QUARTZ (gc);
if (private->have_clip_region)
{
CGRect rect;
CGRect *cg_rects;
GdkRectangle *rects;
gint n_rects, i;
gdk_region_get_rectangles (_gdk_gc_get_clip_region (gc),
&rects, &n_rects);
if (n_rects == 1)
cg_rects = &rect;
else
cg_rects = g_new (CGRect, n_rects);
for (i = 0; i < n_rects; i++)
{
cg_rects[i].origin.x = rects[i].x + gc->clip_x_origin;
cg_rects[i].origin.y = rects[i].y + gc->clip_y_origin;
cg_rects[i].size.width = rects[i].width;
cg_rects[i].size.height = rects[i].height;
}
CGContextClipToRects (context, cg_rects, n_rects);
g_free (rects);
if (cg_rects != &rect)
g_free (cg_rects);
}
else if (private->have_clip_mask && private->clip_mask)
{
/* Note: This is 10.4 only. For lower versions, we need to transform the
* mask into a region.
*/
CGContextClipToMask (context,
CGRectMake (gc->clip_x_origin, gc->clip_y_origin,
CGImageGetWidth (private->clip_mask),
CGImageGetHeight (private->clip_mask)),
private->clip_mask);
}
fg_pixel = _gdk_gc_get_fg_pixel (gc);
bg_pixel = _gdk_gc_get_bg_pixel (gc);
{
CGBlendMode blend_mode = kCGBlendModeNormal;
switch (private->function)
{
case GDK_COPY:
blend_mode = kCGBlendModeNormal;
break;
case GDK_INVERT:
blend_mode = kCGBlendModeExclusion;
fg_pixel = 0xffffffff;
bg_pixel = 0xffffffff;
break;
case GDK_XOR:
blend_mode = kCGBlendModeExclusion;
break;
case GDK_CLEAR:
case GDK_AND:
case GDK_AND_REVERSE:
case GDK_AND_INVERT:
case GDK_NOOP:
case GDK_OR:
case GDK_EQUIV:
case GDK_OR_REVERSE:
case GDK_COPY_INVERT:
case GDK_OR_INVERT:
case GDK_NAND:
case GDK_NOR:
case GDK_SET:
blend_mode = kCGBlendModeNormal; /* FIXME */
break;
}
CGContextSetBlendMode (context, blend_mode);
}
/* FIXME: implement subwindow mode */
/* FIXME: implement graphics exposures */
if (mask & GDK_QUARTZ_CONTEXT_STROKE)
{
CGLineCap line_cap = kCGLineCapButt;
CGLineJoin line_join = kCGLineJoinMiter;
gfloat r, g, b, a;
gdk_quartz_get_rgba_from_pixel (gc->colormap, fg_pixel,
&r, &g, &b, &a);
CGContextSetRGBStrokeColor (context, r, g, b, a);
CGContextSetLineWidth (context, MAX (G_MINFLOAT, private->line_width));
switch (private->line_style)
{
case GDK_LINE_SOLID:
CGContextSetLineDash (context, 0.0, NULL, 0);
break;
case GDK_LINE_DOUBLE_DASH:
/* FIXME: Implement; for now, fall back to GDK_LINE_ON_OFF_DASH */
case GDK_LINE_ON_OFF_DASH:
CGContextSetLineDash (context, private->dash_phase,
private->dash_lengths, private->dash_count);
break;
}
switch (private->cap_style)
{
case GDK_CAP_NOT_LAST:
/* FIXME: Implement; for now, fall back to GDK_CAP_BUTT */
case GDK_CAP_BUTT:
line_cap = kCGLineCapButt;
break;
case GDK_CAP_ROUND:
line_cap = kCGLineCapRound;
break;
case GDK_CAP_PROJECTING:
line_cap = kCGLineCapSquare;
break;
}
CGContextSetLineCap (context, line_cap);
switch (private->join_style)
{
case GDK_JOIN_MITER:
line_join = kCGLineJoinMiter;
break;
case GDK_JOIN_ROUND:
line_join = kCGLineJoinRound;
break;
case GDK_JOIN_BEVEL:
line_join = kCGLineJoinBevel;
break;
}
CGContextSetLineJoin (context, line_join);
}
if (mask & GDK_QUARTZ_CONTEXT_FILL)
{
GdkFill fill = _gdk_gc_get_fill (gc);
CGColorSpaceRef baseSpace;
CGColorSpaceRef patternSpace;
gfloat alpha = 1.0;
gfloat colors[4] = { 0.0, 0.0, 0.0, 0.0 };
gfloat r, g, b, a;
if (fill == GDK_SOLID)
{
gdk_quartz_get_rgba_from_pixel (gc->colormap, fg_pixel,
&r, &g, &b, &a);
CGContextSetRGBFillColor (context, r, g, b, a);
}
else
{
if (!private->ts_pattern)
{
CGImageRef pattern_image = NULL;
gfloat width, height;
gboolean is_colored = FALSE;
CGPatternCallbacks callbacks = { 0, NULL, NULL };
switch (fill)
{
case GDK_TILED:
pattern_image = GDK_PIXMAP_IMPL_QUARTZ (GDK_PIXMAP_OBJECT (_gdk_gc_get_tile (gc))->impl)->image;
is_colored = TRUE;
callbacks.drawPattern = gdk_quartz_draw_tiled_pattern;
break;
case GDK_STIPPLED:
pattern_image = GDK_PIXMAP_IMPL_QUARTZ (GDK_PIXMAP_OBJECT (_gdk_gc_get_stipple (gc))->impl)->image;
is_colored = FALSE;
callbacks.drawPattern = gdk_quartz_draw_stippled_pattern;
break;
case GDK_OPAQUE_STIPPLED:
pattern_image = GDK_PIXMAP_IMPL_QUARTZ (GDK_PIXMAP_OBJECT (_gdk_gc_get_stipple (gc))->impl)->image;
is_colored = TRUE;
callbacks.drawPattern = gdk_quartz_draw_opaque_stippled_pattern;
break;
default:
break;
}
width = CGImageGetWidth (pattern_image);
height = CGImageGetHeight (pattern_image);
private->ts_pattern = CGPatternCreate (private,
CGRectMake (0, 0, width, height),
CGAffineTransformIdentity,
width, height,
kCGPatternTilingConstantSpacing,
is_colored,
&callbacks);
}
baseSpace = (fill == GDK_STIPPLED) ? CGColorSpaceCreateWithName (kCGColorSpaceGenericRGB) : NULL;
patternSpace = CGColorSpaceCreatePattern (baseSpace);
CGContextSetFillColorSpace (context, patternSpace);
CGColorSpaceRelease (patternSpace);
CGColorSpaceRelease (baseSpace);
if (fill == GDK_STIPPLED)
gdk_quartz_get_rgba_from_pixel (gc->colormap, fg_pixel,
&colors[0], &colors[1],
&colors[2], &colors[3]);
CGContextSetFillPattern (context, private->ts_pattern,
(fill == GDK_STIPPLED) ? colors : &alpha);
}
}
if (mask & GDK_QUARTZ_CONTEXT_TEXT)
{
/* FIXME: implement text */
}
}
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