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demo: Spice up the mask demo

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Also use all the mask modes, weeeee!
This commit is contained in:
Benjamin Otte 2023-02-14 20:16:15 +01:00 committed by Matthias Clasen
parent 0d97d03fc1
commit 662c251cd0
2 changed files with 119 additions and 9 deletions
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111
demos/gtk-demo/demo4widget.c
View File

@ -2,12 +2,19 @@
#include "demo4widget.h"
#include "hsla.h"
enum
{
PROP_0,
PROP_PROGRESS,
};
struct _Demo4Widget
{
GtkWidget parent_instance;
PangoLayout *layout;
GskColorStop stops[8];
gsize n_stops;
double progress;
guint tick;
};
@ -49,6 +56,8 @@ demo4_widget_init (Demo4Widget *self)
{
PangoFontDescription *desc;
self->progress = 0.5;
self->n_stops = 8;
self->stops[0].offset = 0;
self->stops[0].color = (GdkRGBA) { 1, 0, 0, 1 };
@ -83,16 +92,24 @@ demo4_widget_dispose (GObject *object)
}
static void
demo4_widget_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
demo4_widget_snapshot_content (GtkWidget *widget,
GtkSnapshot *snapshot,
GskMaskMode mode)
{
Demo4Widget *self = DEMO4_WIDGET (widget);
int width, height;
int width, height, layout_width, layout_height;
double scale;
width = gtk_widget_get_width (widget);
height = gtk_widget_get_height (widget);
gtk_snapshot_push_mask (snapshot, GSK_MASK_MODE_INVERTED_ALPHA);
gtk_snapshot_push_mask (snapshot, mode);
pango_layout_get_pixel_size (self->layout, &layout_width, &layout_height);
scale = MIN ((double) width / layout_width, (double) height / layout_height);
gtk_snapshot_translate (snapshot,
&GRAPHENE_POINT_INIT ((width - scale * layout_width) / 2,
(height - scale * layout_height) / 2));
gtk_snapshot_scale (snapshot, scale, scale);
gtk_snapshot_append_layout (snapshot, self->layout, &(GdkRGBA) { 0, 0, 0, 1 });
gtk_snapshot_pop (snapshot);
@ -105,6 +122,84 @@ demo4_widget_snapshot (GtkWidget *widget,
gtk_snapshot_pop (snapshot);
}
static void
demo4_widget_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
Demo4Widget *self = DEMO4_WIDGET (widget);
int width, height;
width = gtk_widget_get_width (widget);
height = gtk_widget_get_height (widget);
gtk_snapshot_push_mask (snapshot, GSK_MASK_MODE_INVERTED_LUMINANCE);
gtk_snapshot_append_linear_gradient (snapshot,
&GRAPHENE_RECT_INIT (0, 0, width, height),
&GRAPHENE_POINT_INIT (0, 0),
&GRAPHENE_POINT_INIT (width, 0),
(GskColorStop[2]) {
{ MAX (0.0, self->progress - 5.0 / width), { 1, 1, 1, 1 } },
{ MIN (1.0, self->progress + 5.0 / width), { 0, 0, 0, 1 } }
}, 2);
gtk_snapshot_pop (snapshot);
demo4_widget_snapshot_content (widget, snapshot, GSK_MASK_MODE_INVERTED_ALPHA);
gtk_snapshot_pop (snapshot);
gtk_snapshot_push_mask (snapshot, GSK_MASK_MODE_LUMINANCE);
gtk_snapshot_append_linear_gradient (snapshot,
&GRAPHENE_RECT_INIT (0, 0, width, height),
&GRAPHENE_POINT_INIT (0, 0),
&GRAPHENE_POINT_INIT (width, 0),
(GskColorStop[2]) {
{ MAX (0.0, self->progress - 5.0 / width), { 1, 1, 1, 1 } },
{ MIN (1.0, self->progress + 5.0 / width), { 0, 0, 0, 1 } }
}, 2);
gtk_snapshot_pop (snapshot);
demo4_widget_snapshot_content (widget, snapshot, GSK_MASK_MODE_ALPHA);
gtk_snapshot_pop (snapshot);
}
static void
demo4_widget_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
Demo4Widget *self = DEMO4_WIDGET (object);
switch (prop_id)
{
case PROP_PROGRESS:
self->progress = g_value_get_double (value);
gtk_widget_queue_draw (GTK_WIDGET (object));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
demo4_widget_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
Demo4Widget *self = DEMO4_WIDGET (object);
switch (prop_id)
{
case PROP_PROGRESS:
g_value_set_double (value, self->progress);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
demo4_widget_class_init (Demo4WidgetClass *class)
{
@ -112,8 +207,15 @@ demo4_widget_class_init (Demo4WidgetClass *class)
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
object_class->dispose = demo4_widget_dispose;
object_class->get_property = demo4_widget_get_property;
object_class->set_property = demo4_widget_set_property;
widget_class->snapshot = demo4_widget_snapshot;
g_object_class_install_property (object_class, PROP_PROGRESS,
g_param_spec_double ("progress", NULL, NULL,
0.0, 1.0, 0.5,
G_PARAM_READWRITE));
}
GtkWidget *
@ -121,3 +223,4 @@ demo4_widget_new (void)
{
return g_object_new (DEMO4_TYPE_WIDGET, NULL);
}

17
demos/gtk-demo/mask.c
View File

@ -18,7 +18,8 @@ do_mask (GtkWidget *do_widget)
if (!window)
{
GtkWidget *box;
GtkWidget *widget;
GtkWidget *demo;
GtkWidget *scale;
window = gtk_window_new ();
gtk_window_set_title (GTK_WINDOW (window), "Mask Nodes");
@ -30,11 +31,17 @@ do_mask (GtkWidget *do_widget)
box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_window_set_child (GTK_WINDOW (window), box);
widget = demo4_widget_new ();
gtk_widget_set_hexpand (widget, TRUE);
gtk_widget_set_vexpand (widget, TRUE);
demo = demo4_widget_new ();
gtk_widget_set_hexpand (demo, TRUE);
gtk_widget_set_vexpand (demo, TRUE);
gtk_box_append (GTK_BOX (box), widget);
gtk_box_append (GTK_BOX (box), demo);
scale = gtk_scale_new_with_range (GTK_ORIENTATION_HORIZONTAL, 0, 1, 0.1);
gtk_range_set_value (GTK_RANGE (scale), 0.5);
g_object_bind_property (gtk_range_get_adjustment (GTK_RANGE (scale)), "value", demo, "progress", 0);
gtk_box_append (GTK_BOX (box), scale);
}
if (!gtk_widget_get_visible (window))