Add Gtk9Slice
This is a private boxed object to contain information about a border image in order to render it in a size independent way.
This commit is contained in:
Carlos Garnacho
@@ -372,6 +372,7 @@ endif
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# GTK+ header files that don't get installed
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gtk_private_h_sources = \
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gtk9slice.h \
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gtkbuttonprivate.h \
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gtkquery.h \
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gtksearchengine.h \
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@@ -431,6 +432,7 @@ gtk_private_h_sources = \
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# GTK+ C sources to build the library from
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gtk_base_c_sources = \
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gtk9slice.c \
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gtkquery.c \
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gtksearchengine.c \
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gtksearchenginesimple.c \
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351
gtk/gtk9slice.c
Normal file
351
gtk/gtk9slice.c
Normal file
@@ -0,0 +1,351 @@
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/* GTK - The GIMP Toolkit
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* Copyright (C) 2010 Carlos Garnacho <carlosg@gnome.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include "gtk9slice.h"
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enum {
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BORDER_LEFT,
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BORDER_MIDDLE,
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BORDER_RIGHT,
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BORDER_LAST,
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BORDER_TOP = BORDER_LEFT,
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BORDER_BOTTOM = BORDER_RIGHT
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};
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enum {
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SIDE_TOP,
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SIDE_RIGHT,
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SIDE_BOTTOM,
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SIDE_LEFT
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};
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struct Gtk9Slice
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{
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cairo_surface_t *surfaces[BORDER_LAST][BORDER_LAST];
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GtkSliceSideModifier modifiers[4];
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gdouble distances[4];
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gint ref_count;
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};
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G_DEFINE_BOXED_TYPE (Gtk9Slice, gtk_9slice,
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gtk_9slice_ref, gtk_9slice_unref)
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Gtk9Slice *
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gtk_9slice_new (GdkPixbuf *pixbuf,
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gdouble distance_top,
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gdouble distance_bottom,
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gdouble distance_left,
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gdouble distance_right,
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GtkSliceSideModifier vertical_modifier,
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GtkSliceSideModifier horizontal_modifier)
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{
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Gtk9Slice *slice;
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cairo_surface_t *surface;
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gint width, height;
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cairo_t *cr;
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g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
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slice = g_slice_new0 (Gtk9Slice);
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slice->ref_count = 1;
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slice->distances[SIDE_TOP] = distance_top;
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slice->distances[SIDE_BOTTOM] = distance_bottom;
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slice->distances[SIDE_LEFT] = distance_left;
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slice->distances[SIDE_RIGHT] = distance_right;
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slice->modifiers[SIDE_TOP] = slice->modifiers[SIDE_BOTTOM] = horizontal_modifier;
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slice->modifiers[SIDE_LEFT] = slice->modifiers[SIDE_RIGHT] = vertical_modifier;
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width = gdk_pixbuf_get_width (pixbuf);
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height = gdk_pixbuf_get_height (pixbuf);
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/* Get an image surface from the pixbuf */
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surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
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cr = cairo_create (surface);
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gdk_cairo_set_source_pixbuf (cr, pixbuf, 0, 0);
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cairo_paint (cr);
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cairo_destroy (cr);
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/* Top /left corner */
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slice->surfaces[BORDER_LEFT][BORDER_TOP] = cairo_surface_create_similar (surface, CAIRO_CONTENT_COLOR_ALPHA,
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distance_left, distance_top);
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cairo_create (slice->surfaces[BORDER_LEFT][BORDER_TOP]);
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cairo_set_source_surface (cr, surface, 0, 0);
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cairo_paint (cr);
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cairo_destroy (cr);
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/* Top/right corner */
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slice->surfaces[BORDER_RIGHT][BORDER_TOP] = cairo_surface_create_similar (surface, CAIRO_CONTENT_COLOR_ALPHA,
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distance_right, distance_top);
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cairo_create (slice->surfaces[BORDER_RIGHT][BORDER_TOP]);
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cairo_set_source_surface (cr, surface, - width + distance_right, 0);
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cairo_paint (cr);
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cairo_destroy (cr);
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/* Bottom/left corner */
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slice->surfaces[BORDER_LEFT][BORDER_BOTTOM] = cairo_surface_create_similar (surface, CAIRO_CONTENT_COLOR_ALPHA,
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distance_left, distance_bottom);
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cairo_create (slice->surfaces[BORDER_LEFT][BORDER_BOTTOM]);
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cairo_set_source_surface (cr, surface, 0, - height + distance_bottom);
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cairo_paint (cr);
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cairo_destroy (cr);
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/* Bottom/right corner */
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slice->surfaces[BORDER_RIGHT][BORDER_BOTTOM] = cairo_surface_create_similar (surface, CAIRO_CONTENT_COLOR_ALPHA,
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distance_right, distance_bottom);
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cairo_create (slice->surfaces[BORDER_RIGHT][BORDER_BOTTOM]);
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cairo_set_source_surface (cr, surface, - width + distance_right, - height + distance_bottom);
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cairo_paint (cr);
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cairo_destroy (cr);
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/* Top side */
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slice->surfaces[BORDER_MIDDLE][BORDER_TOP] = cairo_surface_create_similar (surface,
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CAIRO_CONTENT_COLOR_ALPHA,
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width - distance_left - distance_right,
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distance_top);
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cairo_create (slice->surfaces[BORDER_MIDDLE][BORDER_TOP]);
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cairo_set_source_surface (cr, surface, - distance_left, 0);
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cairo_paint (cr);
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cairo_destroy (cr);
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/* Bottom side */
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slice->surfaces[BORDER_MIDDLE][BORDER_BOTTOM] = cairo_surface_create_similar (surface,
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CAIRO_CONTENT_COLOR_ALPHA,
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width - distance_left - distance_right,
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distance_bottom);
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cairo_create (slice->surfaces[BORDER_MIDDLE][BORDER_BOTTOM]);
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cairo_set_source_surface (cr, surface, - distance_left, - height + distance_bottom);
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cairo_paint (cr);
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cairo_destroy (cr);
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/* Left side */
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slice->surfaces[BORDER_LEFT][BORDER_MIDDLE] = cairo_surface_create_similar (surface,
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CAIRO_CONTENT_COLOR_ALPHA,
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distance_left,
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height - distance_top - distance_bottom);
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cairo_create (slice->surfaces[BORDER_LEFT][BORDER_MIDDLE]);
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cairo_set_source_surface (cr, surface, 0, - distance_top);
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cairo_paint (cr);
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cairo_destroy (cr);
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/* Right side */
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slice->surfaces[BORDER_RIGHT][BORDER_MIDDLE] = cairo_surface_create_similar (surface,
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CAIRO_CONTENT_COLOR_ALPHA,
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distance_right,
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height - distance_top - distance_bottom);
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cairo_create (slice->surfaces[BORDER_RIGHT][BORDER_MIDDLE]);
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cairo_set_source_surface (cr, surface, - width + distance_right, - distance_top);
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cairo_paint (cr);
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cairo_destroy (cr);
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/* Center */
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slice->surfaces[BORDER_MIDDLE][BORDER_MIDDLE] = cairo_surface_create_similar (surface,
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CAIRO_CONTENT_COLOR_ALPHA,
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width - distance_left - distance_right,
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height - distance_top - distance_bottom);
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cairo_create (slice->surfaces[BORDER_MIDDLE][BORDER_MIDDLE]);
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cairo_set_source_surface (cr, surface, - distance_left, - distance_top);
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cairo_paint (cr);
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cairo_destroy (cr);
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return slice;
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}
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static void
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render_border (cairo_t *cr,
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cairo_surface_t *surface,
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gdouble x,
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gdouble y,
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gdouble width,
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gdouble height,
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GtkSliceSideModifier modifier)
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{
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cairo_pattern_t *pattern;
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cairo_matrix_t matrix;
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cairo_save (cr);
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cairo_rectangle (cr, x, y, width, height);
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cairo_clip (cr);
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pattern = cairo_pattern_create_for_surface (surface);
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cairo_matrix_init_translate (&matrix, - x, - y);
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if (modifier == GTK_SLICE_REPEAT)
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cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REPEAT);
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else
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{
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gint w;
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w = cairo_image_surface_get_width (surface);
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cairo_matrix_scale (&matrix, width / w, 0);
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}
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cairo_pattern_set_matrix (pattern, &matrix);
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cairo_set_source (cr, pattern);
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cairo_rectangle (cr, x, y, width, height);
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cairo_fill (cr);
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cairo_restore (cr);
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}
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static void
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render_corner (cairo_t *cr,
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cairo_surface_t *surface,
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gdouble x,
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gdouble y,
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gdouble width,
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gdouble height)
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{
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cairo_save (cr);
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cairo_rectangle (cr, x, y, width, height);
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cairo_clip (cr);
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cairo_set_source_surface (cr, surface, x, y);
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cairo_rectangle (cr, x, y, width, height);
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cairo_fill (cr);
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cairo_restore (cr);
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}
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void
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gtk_9slice_render (Gtk9Slice *slice,
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cairo_t *cr,
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gdouble x,
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gdouble y,
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gdouble width,
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gdouble height)
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{
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int img_width, img_height;
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cairo_surface_t *surface;
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cairo_save (cr);
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/* Top side */
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surface = slice->surfaces[BORDER_MIDDLE][BORDER_TOP];
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img_height = cairo_image_surface_get_height (surface);
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render_border (cr, surface,
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x + slice->distances[SIDE_LEFT], y,
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(gdouble) width - slice->distances[SIDE_LEFT] - slice->distances[SIDE_RIGHT],
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(gdouble) img_height,
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slice->modifiers[SIDE_TOP]);
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/* Bottom side */
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surface = slice->surfaces[BORDER_MIDDLE][BORDER_BOTTOM];
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img_height = cairo_image_surface_get_height (surface);
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render_border (cr, surface,
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x + slice->distances[SIDE_LEFT], y + height - img_height,
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(gdouble) width - slice->distances[SIDE_LEFT] - slice->distances[SIDE_RIGHT],
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(gdouble) img_height,
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slice->modifiers[SIDE_BOTTOM]);
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/* Left side */
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surface = slice->surfaces[BORDER_LEFT][BORDER_MIDDLE];
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img_width = cairo_image_surface_get_width (surface);
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render_border (cr, surface,
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x, y + slice->distances[SIDE_TOP],
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(gdouble) img_width,
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(gdouble) height - slice->distances[SIDE_TOP] - slice->distances[SIDE_BOTTOM],
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slice->modifiers[SIDE_LEFT]);
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/* Right side */
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surface = slice->surfaces[BORDER_RIGHT][BORDER_MIDDLE];
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img_width = cairo_image_surface_get_width (surface);
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render_border (cr, surface,
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x + width - img_width, y + slice->distances[SIDE_TOP],
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(gdouble) img_width, height - slice->distances[SIDE_TOP] - slice->distances[SIDE_BOTTOM],
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slice->modifiers[SIDE_RIGHT]);
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/* Top/Left corner */
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surface = slice->surfaces[BORDER_LEFT][BORDER_TOP];
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img_width = cairo_image_surface_get_width (surface);
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img_height = cairo_image_surface_get_height (surface);
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render_corner (cr, surface, x, y, (gdouble) img_width, (gdouble) img_height);
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/* Top/right corner */
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surface = slice->surfaces[BORDER_RIGHT][BORDER_TOP];
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img_width = cairo_image_surface_get_width (surface);
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img_height = cairo_image_surface_get_height (surface);
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render_corner (cr, surface, x + width - img_width, y,
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(gdouble) img_width, (gdouble) img_height);
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/* Bottom/left corner */
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surface = slice->surfaces[BORDER_LEFT][BORDER_BOTTOM];
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img_width = cairo_image_surface_get_width (surface);
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img_height = cairo_image_surface_get_height (surface);
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render_corner (cr, surface, x, y + height - img_height,
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(gdouble) img_width, (gdouble) img_height);
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/* Bottom/right corner */
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surface = slice->surfaces[BORDER_RIGHT][BORDER_BOTTOM];
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img_width = cairo_image_surface_get_width (surface);
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img_height = cairo_image_surface_get_height (surface);
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render_corner (cr, surface, x + width - img_width, y + height - img_height,
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(gdouble) img_width, (gdouble) img_height);
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cairo_restore (cr);
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}
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Gtk9Slice *
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gtk_9slice_ref (Gtk9Slice *slice)
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{
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g_return_val_if_fail (slice != NULL, NULL);
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slice->ref_count++;
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return slice;
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}
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void
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gtk_9slice_unref (Gtk9Slice *slice)
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{
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g_return_if_fail (slice != NULL);
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slice->ref_count--;
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if (slice->ref_count == 0)
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{
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gint i, j;
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for (i = 0; i < BORDER_LAST; i++)
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for (j = 0; j < BORDER_LAST; j++)
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cairo_surface_destroy (slice->surfaces[i][j]);
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g_slice_free (Gtk9Slice, slice);
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}
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}
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59
gtk/gtk9slice.h
Normal file
59
gtk/gtk9slice.h
Normal file
@@ -0,0 +1,59 @@
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/* GTK - The GIMP Toolkit
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* Copyright (C) 2010 Carlos Garnacho <carlosg@gnome.org>
|
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*
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* This library is free software; you can redistribute it and/or
|
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* modify it under the terms of the GNU Lesser General Public
|
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* License as published by the Free Software Foundation; either
|
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* version 2 of the License, or (at your option) any later version.
|
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*
|
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* 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,
|
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* Boston, MA 02111-1307, USA.
|
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*/
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#ifndef __GTK_9SLICE_H__
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#define __GTK_9SLICE_H__
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#include "gtktimeline.h"
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G_BEGIN_DECLS
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/* Dummy typedefs */
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typedef struct Gtk9Slice Gtk9Slice;
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#define GTK_TYPE_9SLICE (gtk_9slice_get_type ())
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typedef enum {
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GTK_SLICE_REPEAT,
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GTK_SLICE_STRETCH
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} GtkSliceSideModifier;
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GType gtk_9slice_get_type (void) G_GNUC_CONST;
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Gtk9Slice * gtk_9slice_new (GdkPixbuf *pixbuf,
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gdouble distance_top,
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gdouble distance_bottom,
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gdouble distance_left,
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gdouble distance_right,
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GtkSliceSideModifier vertical_modifier,
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GtkSliceSideModifier horizontal_modifier);
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Gtk9Slice * gtk_9slice_ref (Gtk9Slice *slice);
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void gtk_9slice_unref (Gtk9Slice *slice);
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void gtk_9slice_render (Gtk9Slice *slice,
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cairo_t *cr,
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gdouble x,
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gdouble y,
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gdouble width,
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gdouble height);
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G_END_DECLS
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#endif /* __GTK_9SLICE_H__ */
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Reference in New Issue
Block a user