#include "config.h"
+#include <math.h>
#include <string.h>
#include "gtkcssimagecrossfadeprivate.h"
return start_height + (end_height - start_height) * cross_fade->progress;
}
+static gboolean
+gtk_css_image_cross_fade_equal (GtkCssImage *image1,
+ GtkCssImage *image2)
+{
+ GtkCssImageCrossFade *cross_fade1 = GTK_CSS_IMAGE_CROSS_FADE (image1);
+ GtkCssImageCrossFade *cross_fade2 = GTK_CSS_IMAGE_CROSS_FADE (image2);
+
+ return cross_fade1->progress == cross_fade2->progress &&
+ _gtk_css_image_equal (cross_fade1->start, cross_fade2->start) &&
+ _gtk_css_image_equal (cross_fade1->end, cross_fade2->end);
+}
+
static void
gtk_css_image_cross_fade_draw (GtkCssImage *image,
cairo_t *cr,
}
else
{
- cairo_surface_t *surface;
-
if (cross_fade->start && cross_fade->end)
{
/* to reduce the group size */
- cairo_rectangle (cr, 0, 0, width, height);
+ cairo_rectangle (cr, 0, 0, ceil (width), ceil (height));
cairo_clip (cr);
cairo_push_group (cr);
+ /* performance trick */
+ cairo_reset_clip (cr);
+
_gtk_css_image_draw (cross_fade->start, cr, width, height);
- surface = _gtk_css_image_get_surface (cross_fade->end,
- cairo_get_target (cr),
- width, height);
- cairo_set_source_surface (cr, surface, 0, 0);
+ cairo_push_group (cr);
+ _gtk_css_image_draw (cross_fade->end, cr, width, height);
+ cairo_pop_group_to_source (cr);
+
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_paint_with_alpha (cr, cross_fade->progress);
- cairo_surface_destroy (surface);
cairo_pop_group_to_source (cr);
cairo_paint (cr);
}
else if (cross_fade->start || cross_fade->end)
{
- surface = _gtk_css_image_get_surface (cross_fade->start ? cross_fade->start : cross_fade->end,
- cairo_get_target (cr),
- width, height);
- cairo_set_source_surface (cr, surface, 0, 0);
+ cairo_push_group (cr);
+ _gtk_css_image_draw (cross_fade->start ? cross_fade->start : cross_fade->end, cr, width, height);
+ cairo_pop_group_to_source (cr);
+
cairo_paint_with_alpha (cr, cross_fade->start ? 1.0 - cross_fade->progress : cross_fade->progress);
- cairo_surface_destroy (surface);
}
}
}
image_class->get_width = gtk_css_image_cross_fade_get_width;
image_class->get_height = gtk_css_image_cross_fade_get_height;
+ image_class->equal = gtk_css_image_cross_fade_equal;
image_class->draw = gtk_css_image_cross_fade_draw;
image_class->parse = gtk_css_image_cross_fade_parse;
image_class->print = gtk_css_image_cross_fade_print;