gtk2/gtk/gtkborderimage.c

689 lines
20 KiB
C

/* 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"
static GtkBorderImageRepeat *
_gtk_border_image_repeat_copy (const GtkBorderImageRepeat *repeat)
{
GtkBorderImageRepeat *retval;
retval = g_slice_new0 (GtkBorderImageRepeat);
*retval = *repeat;
return retval;
}
static void
_gtk_border_image_repeat_free (GtkBorderImageRepeat *repeat)
{
g_slice_free (GtkBorderImageRepeat, repeat);
}
G_DEFINE_BOXED_TYPE (GtkBorderImageRepeat, _gtk_border_image_repeat,
_gtk_border_image_repeat_copy, _gtk_border_image_repeat_free)
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;
GtkGradient *source_gradient;
GtkBorder slice;
GtkBorderImageRepeat repeat;
gint ref_count;
gboolean resolved;
cairo_surface_t *surfaces[BORDER_LAST][BORDER_LAST];
};
static void
_gtk_border_image_ensure_slices (GtkBorderImage *image,
gdouble width,
gdouble height)
{
cairo_surface_t *surface;
cairo_t *cr;
if (image->surfaces[0][0] != NULL)
return;
if (cairo_pattern_get_type (image->source) != CAIRO_PATTERN_TYPE_SURFACE)
{
cairo_matrix_t matrix;
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);
cr = cairo_create (surface);
cairo_set_source (cr, image->source);
cairo_paint (cr);
cairo_destroy (cr);
}
else
{
cairo_pattern_get_surface (image->source, &surface);
cairo_surface_reference (surface);
width = cairo_image_surface_get_width (surface);
height = cairo_image_surface_get_height (surface);
}
/* Top /left corner */
image->surfaces[BORDER_LEFT][BORDER_TOP] =
cairo_surface_create_similar (surface, CAIRO_CONTENT_COLOR_ALPHA,
image->slice.left, image->slice.top);
cr = cairo_create (image->surfaces[BORDER_LEFT][BORDER_TOP]);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
/* Top/right corner */
image->surfaces[BORDER_RIGHT][BORDER_TOP] =
cairo_surface_create_similar (surface, CAIRO_CONTENT_COLOR_ALPHA,
image->slice.right, image->slice.top);
cr = cairo_create (image->surfaces[BORDER_RIGHT][BORDER_TOP]);
cairo_set_source_surface (cr, surface,
- width + image->slice.right,
0);
cairo_paint (cr);
cairo_destroy (cr);
/* Bottom/left corner */
image->surfaces[BORDER_LEFT][BORDER_BOTTOM] =
cairo_surface_create_similar (surface, CAIRO_CONTENT_COLOR_ALPHA,
image->slice.left, image->slice.bottom);
cr = cairo_create (image->surfaces[BORDER_LEFT][BORDER_BOTTOM]);
cairo_set_source_surface (cr, surface,
0,
- height + image->slice.bottom);
cairo_paint (cr);
cairo_destroy (cr);
/* Bottom/right corner */
image->surfaces[BORDER_RIGHT][BORDER_BOTTOM] =
cairo_surface_create_similar (surface, CAIRO_CONTENT_COLOR_ALPHA,
image->slice.right, image->slice.bottom);
cr = cairo_create (image->surfaces[BORDER_RIGHT][BORDER_BOTTOM]);
cairo_set_source_surface (cr, surface,
- width + image->slice.right,
- height + image->slice.bottom);
cairo_paint (cr);
cairo_destroy (cr);
if ((image->slice.left + image->slice.right) < width)
{
/* Top side */
image->surfaces[BORDER_MIDDLE][BORDER_TOP] =
cairo_surface_create_similar (surface,
CAIRO_CONTENT_COLOR_ALPHA,
width - image->slice.left - image->slice.right,
image->slice.top);
cr = cairo_create (image->surfaces[BORDER_MIDDLE][BORDER_TOP]);
cairo_set_source_surface (cr, surface,
- image->slice.left,
0);
cairo_paint (cr);
cairo_destroy (cr);
/* Bottom side */
image->surfaces[BORDER_MIDDLE][BORDER_BOTTOM] =
cairo_surface_create_similar (surface,
CAIRO_CONTENT_COLOR_ALPHA,
width - image->slice.left - image->slice.right,
image->slice.bottom);
cr = cairo_create (image->surfaces[BORDER_MIDDLE][BORDER_BOTTOM]);
cairo_set_source_surface (cr, surface,
- image->slice.left,
- height + image->slice.bottom);
cairo_paint (cr);
cairo_destroy (cr);
}
if ((image->slice.top + image->slice.bottom) < height)
{
/* Left side */
image->surfaces[BORDER_LEFT][BORDER_MIDDLE] =
cairo_surface_create_similar (surface,
CAIRO_CONTENT_COLOR_ALPHA,
image->slice.left,
height - image->slice.top - image->slice.bottom);
cr = cairo_create (image->surfaces[BORDER_LEFT][BORDER_MIDDLE]);
cairo_set_source_surface (cr, surface,
0,
- image->slice.top);
cairo_paint (cr);
cairo_destroy (cr);
/* Right side */
image->surfaces[BORDER_RIGHT][BORDER_MIDDLE] =
cairo_surface_create_similar (surface,
CAIRO_CONTENT_COLOR_ALPHA,
image->slice.right,
height - image->slice.top - image->slice.bottom);
cr = cairo_create (image->surfaces[BORDER_RIGHT][BORDER_MIDDLE]);
cairo_set_source_surface (cr, surface,
- width + image->slice.right,
- image->slice.top);
cairo_paint (cr);
cairo_destroy (cr);
}
cairo_surface_destroy (surface);
}
GtkBorderImage *
_gtk_border_image_new (cairo_pattern_t *pattern,
GtkBorder *slice,
GtkBorderImageRepeat *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 (repeat != NULL)
image->repeat = *repeat;
image->resolved = TRUE;
return image;
}
GtkBorderImage *
_gtk_border_image_new_for_gradient (GtkGradient *gradient,
GtkBorder *slice,
GtkBorderImageRepeat *repeat)
{
GtkBorderImage *image;
image = g_slice_new0 (GtkBorderImage);
image->ref_count = 1;
if (gradient != NULL)
image->source_gradient = gtk_gradient_ref (gradient);
if (slice != NULL)
image->slice = *slice;
if (repeat != NULL)
image->repeat = *repeat;
image->resolved = FALSE;
return image;
}
gboolean
_gtk_border_image_get_resolved (GtkBorderImage *image)
{
return image->resolved;
}
GtkBorderImage *
_gtk_border_image_resolve (GtkBorderImage *image,
GtkStyleProperties *props)
{
GtkBorderImage *resolved_image;
cairo_pattern_t *pattern;
if (image->resolved)
return _gtk_border_image_ref (image);
image->resolved =
gtk_gradient_resolve (image->source_gradient, props, &pattern);
if (!image->resolved)
return NULL;
resolved_image = _gtk_border_image_new (pattern, &image->slice, &image->repeat);
return resolved_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_gradient != NULL)
gtk_gradient_unref (image->source_gradient);
g_slice_free (GtkBorderImage, image);
}
}
GParameter *
_gtk_border_image_unpack (const GValue *value,
guint *n_params)
{
GParameter *parameter = g_new0 (GParameter, 3);
GtkBorderImage *image = g_value_get_boxed (value);
parameter[0].name = "border-image-source";
g_value_init (&parameter[0].value, CAIRO_GOBJECT_TYPE_PATTERN);
g_value_set_boxed (&parameter[0].value, image->source);
parameter[1].name = "border-image-slice";
g_value_init (&parameter[1].value, GTK_TYPE_BORDER);
g_value_set_boxed (&parameter[1].value, &image->slice);
parameter[2].name = "border-image-repeat";
g_value_init (&parameter[2].value, GTK_TYPE_BORDER_IMAGE_REPEAT);
g_value_set_boxed (&parameter[2].value, &image->repeat);
*n_params = 3;
return parameter;
}
void
_gtk_border_image_pack (GValue *value,
GtkStyleProperties *props,
GtkStateFlags state)
{
GtkBorderImage *image;
cairo_pattern_t *source;
GtkBorder *slice;
GtkBorderImageRepeat *repeat;
gtk_style_properties_get (props, state,
"border-image-source", &source,
"border-image-slice", &slice,
"border-image-repeat", &repeat,
NULL);
if (source == NULL)
{
g_value_take_boxed (value, NULL);
}
else
{
image = _gtk_border_image_new (source, slice, repeat);
g_value_take_boxed (value, image);
cairo_pattern_destroy (source);
}
if (slice != NULL)
gtk_border_free (slice);
if (repeat != NULL)
_gtk_border_image_repeat_free (repeat);
}
static void
render_corner (cairo_t *cr,
cairo_surface_t *surface,
gdouble x,
gdouble y,
gdouble width,
gdouble height)
{
gint image_width, image_height;
if (width == 0 || height == 0)
return;
cairo_save (cr);
image_width = cairo_image_surface_get_width (surface);
image_height = cairo_image_surface_get_height (surface);
cairo_translate (cr, x, y);
cairo_scale (cr,
width / image_width,
height / image_height);
cairo_set_source_surface (cr, surface, 0, 0);
/* use the nearest filter for scaling, to avoid color blending */
cairo_pattern_set_filter (cairo_get_source (cr), CAIRO_FILTER_NEAREST);
cairo_paint (cr);
cairo_restore (cr);
}
static cairo_surface_t *
create_spaced_surface (cairo_surface_t *tile,
gdouble width,
gdouble height,
GtkOrientation orientation)
{
gint n_repeats, idx;
gint tile_width, tile_height;
gdouble avail_space, step;
cairo_surface_t *retval;
cairo_t *cr;
tile_width = cairo_image_surface_get_width (tile);
tile_height = cairo_image_surface_get_height (tile);
n_repeats = (orientation == GTK_ORIENTATION_HORIZONTAL) ?
(gint) floor (width / tile_width) :
(gint) floor (height / tile_height);
avail_space = (orientation == GTK_ORIENTATION_HORIZONTAL) ?
width - (n_repeats * tile_width) :
height - (n_repeats * tile_height);
step = avail_space / (n_repeats + 2);
retval = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
width, height);
cr = cairo_create (retval);
idx = 0;
while (idx < n_repeats)
{
cairo_save (cr);
if (orientation == GTK_ORIENTATION_HORIZONTAL)
cairo_set_source_surface (cr, tile,
((idx + 1) * step) + (idx * tile_width), 0);
else
cairo_set_source_surface (cr, tile,
0, ((idx + 1 ) * step) + (idx * tile_height));
cairo_paint (cr);
cairo_restore (cr);
idx++;
}
cairo_destroy (cr);
return retval;
}
static void
render_border (cairo_t *cr,
cairo_surface_t *surface,
gdouble total_width,
gdouble total_height,
guint side,
GtkBorder *border_area,
GtkBorderImageRepeat *repeat)
{
gdouble target_x, target_y;
gdouble target_width, target_height;
gint original_width, original_height;
GdkRectangle image_area;
cairo_pattern_t *pattern;
gboolean repeat_pattern;
if (surface == NULL)
return;
cairo_surface_reference (surface);
repeat_pattern = FALSE;
original_width = cairo_image_surface_get_width (surface);
original_height = cairo_image_surface_get_height (surface);
if (side == SIDE_TOP || side == SIDE_BOTTOM)
{
target_height = (side == SIDE_TOP) ? (border_area->top) : (border_area->bottom);
target_width = original_width * (target_height / original_height);
}
else
{
target_width = (side == SIDE_LEFT) ? (border_area->left) : (border_area->right);
target_height = original_height * (target_width / original_width);
}
if (side == SIDE_TOP || side == SIDE_BOTTOM)
{
image_area.x = border_area->left;
image_area.y = (side == SIDE_TOP) ? 0 : (total_height - border_area->bottom);
image_area.width = total_width - border_area->left - border_area->right;
image_area.height = (side == SIDE_TOP) ? border_area->top : border_area->bottom;
target_x = border_area->left;
target_y = (side == SIDE_TOP) ? 0 : (total_height - border_area->bottom);
if (repeat->vrepeat == GTK_REPEAT_STYLE_NONE)
{
target_width = image_area.width;
}
else if (repeat->vrepeat == GTK_REPEAT_STYLE_REPEAT)
{
repeat_pattern = TRUE;
target_x = border_area->left + (total_width - border_area->left - border_area->right) / 2;
target_y = ((side == SIDE_TOP) ? 0 : (total_height - border_area->bottom)) / 2;
}
else if (repeat->vrepeat == GTK_REPEAT_STYLE_ROUND)
{
gint n_repeats;
repeat_pattern = TRUE;
n_repeats = (gint) floor (image_area.width / original_width);
target_width = image_area.width / n_repeats;
}
else if (repeat->vrepeat == GTK_REPEAT_STYLE_SPACE)
{
cairo_surface_t *spaced_surface;
spaced_surface = create_spaced_surface (surface,
image_area.width, original_height,
GTK_ORIENTATION_HORIZONTAL);
cairo_surface_destroy (surface);
surface = spaced_surface;
/* short-circuit hscaling */
target_width = original_width = cairo_image_surface_get_width (surface);
}
}
else
{
image_area.x = (side == SIDE_LEFT) ? 0 : (total_width - border_area->right);
image_area.y = border_area->top;
image_area.width = (side == SIDE_LEFT) ? border_area->left : border_area->right;
image_area.height = total_height - border_area->top - border_area->bottom;
target_x = (side == SIDE_LEFT) ? 0 : (total_width - border_area->right);
target_y = border_area->top;
if (repeat->hrepeat == GTK_REPEAT_STYLE_NONE)
{
target_height = total_height - border_area->top - border_area->bottom;
}
else if (repeat->hrepeat == GTK_REPEAT_STYLE_REPEAT)
{
repeat_pattern = TRUE;
target_height = total_height - border_area->top - border_area->bottom;
target_x = (side == SIDE_LEFT) ? 0 : (total_width - border_area->right) / 2;
target_y = border_area->top + (total_height - border_area->top - border_area->bottom) / 2;
}
else if (repeat->hrepeat == GTK_REPEAT_STYLE_ROUND)
{
gint n_repeats;
repeat_pattern = TRUE;
n_repeats = (gint) floor (image_area.height / original_height);
target_height = image_area.height / n_repeats;
}
else if (repeat->hrepeat == GTK_REPEAT_STYLE_SPACE)
{
cairo_surface_t *spaced_surface;
spaced_surface = create_spaced_surface (surface,
original_width, image_area.height,
GTK_ORIENTATION_VERTICAL);
cairo_surface_destroy (surface);
surface = spaced_surface;
/* short-circuit vscaling */
target_height = original_height = cairo_image_surface_get_height (surface);
}
}
if (target_width == 0 || target_height == 0)
return;
cairo_save (cr);
pattern = cairo_pattern_create_for_surface (surface);
gdk_cairo_rectangle (cr, &image_area);
cairo_clip (cr);
cairo_translate (cr,
target_x, target_y);
/* use the nearest filter for scaling, to avoid color blending */
cairo_pattern_set_filter (pattern, CAIRO_FILTER_NEAREST);
if (repeat_pattern)
cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
cairo_scale (cr,
target_width / original_width,
target_height / original_height);
cairo_set_source (cr, pattern);
cairo_paint (cr);
cairo_restore (cr);
cairo_pattern_destroy (pattern);
}
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;
_gtk_border_image_ensure_slices (image, width, height);
cairo_save (cr);
cairo_translate (cr, x, y);
/* Top side */
surface = image->surfaces[BORDER_MIDDLE][BORDER_TOP];
render_border (cr, surface,
width, height, SIDE_TOP,
border_width, &image->repeat);
/* Bottom side */
surface = image->surfaces[BORDER_MIDDLE][BORDER_BOTTOM];
render_border (cr, surface,
width, height, SIDE_BOTTOM,
border_width, &image->repeat);
/* Left side */
surface = image->surfaces[BORDER_LEFT][BORDER_MIDDLE];
render_border (cr, surface,
width, height, SIDE_LEFT,
border_width, &image->repeat);
/* Right side */
surface = image->surfaces[BORDER_RIGHT][BORDER_MIDDLE];
render_border (cr, surface,
width, height, SIDE_RIGHT,
border_width, &image->repeat);
/* Top/Left corner */
surface = image->surfaces[BORDER_LEFT][BORDER_TOP];
render_corner (cr, surface,
0, 0,
border_width->left, border_width->top);
/* Top/right corner */
surface = image->surfaces[BORDER_RIGHT][BORDER_TOP];
render_corner (cr, surface,
width - border_width->right, 0,
border_width->right, border_width->top);
/* Bottom/left corner */
surface = image->surfaces[BORDER_LEFT][BORDER_BOTTOM];
render_corner (cr, surface,
0, height - border_width->bottom,
border_width->left, border_width->bottom);
/* Bottom/right corner */
surface = image->surfaces[BORDER_RIGHT][BORDER_BOTTOM];
render_corner (cr, surface,
width - border_width->right, height - border_width->bottom,
border_width->right, border_width->bottom);
cairo_restore (cr);
}