forked from AuroraMiddleware/gtk
af2c40bd54
We need to be able to compute different GtkCssImage values depending on the scale, and we need this at compute time so that we don't need to read any images other than the scale in used (to e.g. calculate the image size). GtkStyleProviderPrivate is shared for all style contexts, so its not right.
109 lines
3.2 KiB
C
109 lines
3.2 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2011 Red Hat, Inc.
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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, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gtkcssrgbavalueprivate.h"
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#include "gtkcssstylepropertyprivate.h"
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#include "gtkstylecontextprivate.h"
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struct _GtkCssValue {
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GTK_CSS_VALUE_BASE
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GdkRGBA rgba;
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};
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static void
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gtk_css_value_rgba_free (GtkCssValue *value)
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{
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g_slice_free (GtkCssValue, value);
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}
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static GtkCssValue *
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gtk_css_value_rgba_compute (GtkCssValue *value,
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guint property_id,
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GtkStyleProviderPrivate *provider,
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int scale,
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GtkCssComputedValues *values,
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GtkCssComputedValues *parent_values,
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GtkCssDependencies *dependencies)
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{
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return _gtk_css_value_ref (value);
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}
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static gboolean
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gtk_css_value_rgba_equal (const GtkCssValue *rgba1,
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const GtkCssValue *rgba2)
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{
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return gdk_rgba_equal (&rgba1->rgba, &rgba2->rgba);
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}
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static GtkCssValue *
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gtk_css_value_rgba_transition (GtkCssValue *start,
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GtkCssValue *end,
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guint property_id,
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double progress)
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{
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GdkRGBA transition;
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progress = CLAMP (progress, 0, 1);
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transition.red = start->rgba.red + (end->rgba.red - start->rgba.red) * progress;
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transition.green = start->rgba.green + (end->rgba.green - start->rgba.green) * progress;
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transition.blue = start->rgba.blue + (end->rgba.blue - start->rgba.blue) * progress;
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transition.alpha = start->rgba.alpha + (end->rgba.alpha - start->rgba.alpha) * progress;
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return _gtk_css_rgba_value_new_from_rgba (&transition);
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}
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static void
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gtk_css_value_rgba_print (const GtkCssValue *rgba,
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GString *string)
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{
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char *s = gdk_rgba_to_string (&rgba->rgba);
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g_string_append (string, s);
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g_free (s);
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}
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static const GtkCssValueClass GTK_CSS_VALUE_RGBA = {
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gtk_css_value_rgba_free,
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gtk_css_value_rgba_compute,
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gtk_css_value_rgba_equal,
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gtk_css_value_rgba_transition,
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gtk_css_value_rgba_print
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};
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GtkCssValue *
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_gtk_css_rgba_value_new_from_rgba (const GdkRGBA *rgba)
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{
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GtkCssValue *value;
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g_return_val_if_fail (rgba != NULL, NULL);
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value = _gtk_css_value_new (GtkCssValue, >K_CSS_VALUE_RGBA);
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value->rgba = *rgba;
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return value;
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}
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const GdkRGBA *
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_gtk_css_rgba_value_get_rgba (const GtkCssValue *rgba)
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{
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g_return_val_if_fail (rgba->class == >K_CSS_VALUE_RGBA, NULL);
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return &rgba->rgba;
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}
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