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gtk/gtk/gtkborderimage.c
Alexander Larsson c09148ca09 Add GtkStylePropertyContext and use it in when getting style properties 
At the toplevel we have _gtk_theming_engine_get, which lets us pass
in a property context with (atm) the size to get the property for.
Then there is a lot of plumbing to push this down into the lower
layers of the style property code until finally hitting
the property resolvers.

I need this because I will be adding a property resolver for win32
theme parts, and they render differently depending on the size
(i.e. they don't scale linearly). The idea is that the code
to get the background properties will pass in the final size
and we will resolve the theme part specification to that particular
size.

If the old non-context calls are used we just hardcode a size
of 100x100.
2011-11-17 12:27:22 +01:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 2010 Carlos Garnacho <carlosg@gnome.org>
* Copyright (C) 2011 Red Hat, Inc.
*
* Authors: Carlos Garnacho <carlosg@gnome.org>
* Cosimo Cecchi <cosimoc@gnome.org>
*
* 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 <cairo-gobject.h>
#include <math.h>
#include "gtkborderimageprivate.h"
#include "gtkstylepropertiesprivate.h"
/* this is in case round() is not provided by the compiler,
* such as in the case of C89 compilers, like MSVC
*/
#include "fallback-c89.c"
G_DEFINE_BOXED_TYPE (GtkBorderImage, _gtk_border_image,
_gtk_border_image_ref, _gtk_border_image_unref)
enum {
BORDER_LEFT,
BORDER_MIDDLE,
BORDER_RIGHT,
BORDER_LAST,
BORDER_TOP = BORDER_LEFT,
BORDER_BOTTOM = BORDER_RIGHT
};
enum {
SIDE_TOP,
SIDE_RIGHT,
SIDE_BOTTOM,
SIDE_LEFT
};
struct _GtkBorderImage {
cairo_pattern_t *source;
gpointer source_boxed;
GType boxed_type;
GtkBorder slice;
GtkBorder *width;
GtkCssBorderImageRepeat repeat;
gint ref_count;
};
GtkBorderImage *
_gtk_border_image_new (cairo_pattern_t *pattern,
GtkBorder *slice,
GtkBorder *width,
GtkCssBorderImageRepeat *repeat)
{
GtkBorderImage *image;
image = g_slice_new0 (GtkBorderImage);
image->ref_count = 1;
if (pattern != NULL)
image->source = cairo_pattern_reference (pattern);
if (slice != NULL)
image->slice = *slice;
if (width != NULL)
image->width = gtk_border_copy (width);
if (repeat != NULL)
image->repeat = *repeat;
return image;
}
GtkBorderImage *
_gtk_border_image_new_for_boxed (GType boxed_type,
gpointer boxed,
GtkBorder *slice,
GtkBorder *width,
GtkCssBorderImageRepeat *repeat)
{
GtkBorderImage *image;
image = g_slice_new0 (GtkBorderImage);
image->ref_count = 1;
if (boxed != NULL)
image->source_boxed = g_boxed_copy (boxed_type, boxed);
image->boxed_type = boxed_type;
if (slice != NULL)
image->slice = *slice;
if (width != NULL)
image->width = gtk_border_copy (width);
if (repeat != NULL)
image->repeat = *repeat;
return image;
}
GtkBorderImage *
_gtk_border_image_ref (GtkBorderImage *image)
{
g_return_val_if_fail (image != NULL, NULL);
image->ref_count++;
return image;
}
void
_gtk_border_image_unref (GtkBorderImage *image)
{
g_return_if_fail (image != NULL);
image->ref_count--;
if (image->ref_count == 0)
{
if (image->source != NULL)
cairo_pattern_destroy (image->source);
if (image->source_boxed != NULL)
g_boxed_free (image->boxed_type, image->source_boxed);
if (image->width != NULL)
gtk_border_free (image->width);
g_slice_free (GtkBorderImage, image);
}
}
GParameter *
_gtk_border_image_unpack (const GValue *value,
guint *n_params)
{
GParameter *parameter = g_new0 (GParameter, 4);
GtkBorderImage *image = g_value_get_boxed (value);
parameter[0].name = "border-image-source";
if ((image != NULL) &&
(image->source_boxed != NULL))
g_value_init (&parameter[0].value, image->boxed_type);
else
g_value_init (&parameter[0].value, CAIRO_GOBJECT_TYPE_PATTERN);
parameter[1].name = "border-image-slice";
g_value_init (&parameter[1].value, GTK_TYPE_BORDER);
parameter[2].name = "border-image-repeat";
g_value_init (&parameter[2].value, GTK_TYPE_CSS_BORDER_IMAGE_REPEAT);
parameter[3].name = "border-image-width";
g_value_init (&parameter[3].value, GTK_TYPE_BORDER);
if (image != NULL)
{
if (image->source_boxed != NULL)
g_value_set_boxed (&parameter[0].value, image->source_boxed);
else
g_value_set_boxed (&parameter[0].value, image->source);
g_value_set_boxed (&parameter[1].value, &image->slice);
g_value_set_boxed (&parameter[2].value, &image->repeat);
g_value_set_boxed (&parameter[3].value, image->width);
}
*n_params = 4;
return parameter;
}
void
_gtk_border_image_pack (GValue *value,
GtkStyleProperties *props,
GtkStateFlags state,
GtkStylePropertyContext *context)
{
GtkBorderImage *image;
cairo_pattern_t *source;
GtkBorder *slice, *width;
GtkCssBorderImageRepeat *repeat;
_gtk_style_properties_get (props, state, context,
"border-image-source", &source,
"border-image-slice", &slice,
"border-image-repeat", &repeat,
"border-image-width", &width,
NULL);
if (source == NULL)
{
g_value_take_boxed (value, NULL);
}
else
{
image = _gtk_border_image_new (source, slice, width, repeat);
g_value_take_boxed (value, image);
cairo_pattern_destroy (source);
}
if (slice != NULL)
gtk_border_free (slice);
if (width != NULL)
gtk_border_free (width);
if (repeat != NULL)
g_free (repeat);
}
typedef struct _GtkBorderImageSliceSize GtkBorderImageSliceSize;
struct _GtkBorderImageSliceSize {
double offset;
double size;
};
static void
gtk_border_image_compute_border_size (GtkBorderImageSliceSize sizes[3],
double offset,
double area_size,
int start_border,
int end_border)
{
/* This code assumes area_size >= start_border + end_border */
sizes[0].offset = offset;
sizes[0].size = start_border;
sizes[1].offset = offset + start_border;
sizes[1].size = area_size - start_border - end_border;
sizes[2].offset = offset + area_size - end_border;
sizes[2].size = end_border;
}
static void
gtk_border_image_render_slice (cairo_t *cr,
cairo_surface_t *slice,
double slice_width,
double slice_height,
double x,
double y,
double width,
double height,
GtkCssBorderRepeatStyle hrepeat,
GtkCssBorderRepeatStyle vrepeat)
{
double hscale, vscale;
double xstep, ystep;
cairo_extend_t extend = CAIRO_EXTEND_PAD;
cairo_matrix_t matrix;
cairo_pattern_t *pattern;
/* We can't draw center tiles yet */
g_assert (hrepeat == GTK_CSS_REPEAT_STYLE_NONE || vrepeat == GTK_CSS_REPEAT_STYLE_NONE);
hscale = width / slice_width;
vscale = height / slice_height;
xstep = width;
ystep = height;
switch (hrepeat)
{
case GTK_CSS_REPEAT_STYLE_REPEAT:
extend = CAIRO_EXTEND_REPEAT;
hscale = vscale;
break;
case GTK_CSS_REPEAT_STYLE_SPACE:
{
double space, n;
extend = CAIRO_EXTEND_NONE;
hscale = vscale;
xstep = hscale * slice_width;
n = floor (width / xstep);
space = (width - n * xstep) / (n + 1);
xstep += space;
x += space;
width -= 2 * space;
}
break;
case GTK_CSS_REPEAT_STYLE_NONE:
break;
case GTK_CSS_REPEAT_STYLE_ROUND:
extend = CAIRO_EXTEND_REPEAT;
hscale = width / (slice_width * MAX (round (width / (slice_width * vscale)), 1));
break;
default:
g_assert_not_reached ();
break;
}
switch (vrepeat)
{
case GTK_CSS_REPEAT_STYLE_REPEAT:
extend = CAIRO_EXTEND_REPEAT;
vscale = hscale;
break;
case GTK_CSS_REPEAT_STYLE_SPACE:
{
double space, n;
extend = CAIRO_EXTEND_NONE;
vscale = hscale;
ystep = vscale * slice_height;
n = floor (height / ystep);
space = (height - n * ystep) / (n + 1);
ystep += space;
y += space;
height -= 2 * space;
}
break;
case GTK_CSS_REPEAT_STYLE_NONE:
break;
case GTK_CSS_REPEAT_STYLE_ROUND:
extend = CAIRO_EXTEND_REPEAT;
vscale = height / (slice_height * MAX (round (height / (slice_height * hscale)), 1));
break;
default:
g_assert_not_reached ();
break;
}
pattern = cairo_pattern_create_for_surface (slice);
cairo_matrix_init_translate (&matrix,
hrepeat == GTK_CSS_REPEAT_STYLE_REPEAT ? slice_width / 2 : 0,
vrepeat == GTK_CSS_REPEAT_STYLE_REPEAT ? slice_height / 2 : 0);
cairo_matrix_scale (&matrix, 1 / hscale, 1 / vscale);
cairo_matrix_translate (&matrix,
hrepeat == GTK_CSS_REPEAT_STYLE_REPEAT ? - width / 2 : 0,
vrepeat == GTK_CSS_REPEAT_STYLE_REPEAT ? - height / 2 : 0);
cairo_pattern_set_matrix (pattern, &matrix);
cairo_pattern_set_extend (pattern, extend);
cairo_save (cr);
cairo_translate (cr, x, y);
for (y = 0; y < height; y += ystep)
{
for (x = 0; x < width; x += xstep)
{
cairo_save (cr);
cairo_translate (cr, x, y);
cairo_set_source (cr, pattern);
cairo_rectangle (cr, 0, 0, xstep, ystep);
cairo_fill (cr);
cairo_restore (cr);
}
}
cairo_restore (cr);
cairo_pattern_destroy (pattern);
}
static void
gtk_border_image_compute_slice_size (GtkBorderImageSliceSize sizes[3],
int surface_size,
int start_size,
int end_size)
{
sizes[0].size = MIN (start_size, surface_size);
sizes[0].offset = 0;
sizes[2].size = MIN (end_size, surface_size);
sizes[2].offset = surface_size - sizes[2].size;
sizes[1].size = MAX (0, surface_size - sizes[0].size - sizes[2].size);
sizes[1].offset = sizes[0].size;
}
void
_gtk_border_image_render (GtkBorderImage *image,
GtkBorder *border_width,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
cairo_surface_t *surface, *slice;
GtkBorderImageSliceSize vertical_slice[3], horizontal_slice[3];
GtkBorderImageSliceSize vertical_border[3], horizontal_border[3];
int surface_width, surface_height;
int h, v;
if (image->width != NULL)
border_width = image->width;
if (cairo_pattern_get_type (image->source) != CAIRO_PATTERN_TYPE_SURFACE)
{
cairo_matrix_t matrix;
cairo_t *surface_cr;
surface_width = width;
surface_height = height;
cairo_matrix_init_scale (&matrix, 1 / width, 1 / height);
cairo_pattern_set_matrix (image->source, &matrix);
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
surface_cr = cairo_create (surface);
cairo_set_source (surface_cr, image->source);
cairo_paint (surface_cr);
cairo_destroy (surface_cr);
}
else
{
cairo_pattern_get_surface (image->source, &surface);
cairo_surface_reference (surface);
surface_width = cairo_image_surface_get_width (surface);
surface_height = cairo_image_surface_get_height (surface);
}
gtk_border_image_compute_slice_size (horizontal_slice,
surface_width,
image->slice.left,
image->slice.right);
gtk_border_image_compute_slice_size (vertical_slice,
surface_height,
image->slice.top,
image->slice.bottom);
gtk_border_image_compute_border_size (horizontal_border,
x,
width,
border_width->left,
border_width->right);
gtk_border_image_compute_border_size (vertical_border,
y,
height,
border_width->top,
border_width->bottom);
for (v = 0; v < 3; v++)
{
if (vertical_slice[v].size == 0 ||
vertical_border[v].size == 0)
continue;
for (h = 0; h < 3; h++)
{
if (horizontal_slice[h].size == 0 ||
horizontal_border[h].size == 0)
continue;
if (h == 1 && v == 1)
continue;
slice = cairo_surface_create_for_rectangle (surface,
horizontal_slice[h].offset,
vertical_slice[v].offset,
horizontal_slice[h].size,
vertical_slice[v].size);
gtk_border_image_render_slice (cr,
slice,
horizontal_slice[h].size,
vertical_slice[v].size,
horizontal_border[h].offset,
vertical_border[v].offset,
horizontal_border[h].size,
vertical_border[v].size,
h == 1 ? image->repeat.hrepeat : GTK_CSS_REPEAT_STYLE_NONE,
v == 1 ? image->repeat.vrepeat : GTK_CSS_REPEAT_STYLE_NONE);
cairo_surface_destroy (slice);
}
}
cairo_surface_destroy (surface);
}
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