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gtk2/gtk/gtkborderimage.c
Alexander Larsson d85aabe1e3 Rename GTK_CSS_REPEAT_STYLE_NONE to GTK_CSS_REPEAT_STYLE_STRETCH 
This is a private type, and the CSS default value is "stretch", which
is how we were parsing and printing NONE anyway.

With this fix we can use the enum stuff for printing/parsing
2011-11-25 15:36:08 +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_STRETCH || vrepeat == GTK_CSS_REPEAT_STYLE_STRETCH);
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_STRETCH:
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_STRETCH:
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_STRETCH,
v == 1 ? image->repeat.vrepeat : GTK_CSS_REPEAT_STYLE_STRETCH);
cairo_surface_destroy (slice);
}
}
cairo_surface_destroy (surface);
}
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