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app: don't create and fill the background surface on each expose() 

Instead, keep it around and only recreate it when widget size or
background type change.
This commit is contained in:
Michael Natterer 2014-05-26 11:03:39 +02:00
parent 5c37ef213d
commit d20b576814
1 changed files with 61 additions and 35 deletions
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96
app/widgets/gimpcircle.c
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@ -52,6 +52,7 @@ struct _GimpCirclePrivate
GimpCircleBackground background;
GdkWindow *event_window;
cairo_surface_t *surface;
};
@ -80,7 +81,8 @@ static void gimp_circle_background_hsv (gdouble angle,
gdouble distance,
guchar *rgb);
static void gimp_circle_draw_background (cairo_t *cr,
static void gimp_circle_draw_background (GimpCircle *circle,
cairo_t *cr,
gint size,
GimpCircleBackground background);
@ -146,6 +148,14 @@ gimp_circle_init (GimpCircle *circle)
static void
gimp_circle_dispose (GObject *object)
{
GimpCircle *circle = GIMP_CIRCLE (object);
if (circle->priv->surface)
{
cairo_surface_destroy (circle->priv->surface);
circle->priv->surface = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
@ -171,6 +181,11 @@ gimp_circle_set_property (GObject *object,
case PROP_BACKGROUND:
circle->priv->background = g_value_get_enum (value);
if (circle->priv->surface)
{
cairo_surface_destroy (circle->priv->surface);
circle->priv->surface = NULL;
}
gtk_widget_queue_draw (GTK_WIDGET (circle));
break;
@ -296,6 +311,12 @@ gimp_circle_size_allocate (GtkWidget *widget,
allocation->y,
allocation->width,
allocation->height);
if (circle->priv->surface)
{
cairo_surface_destroy (circle->priv->surface);
circle->priv->surface = NULL;
}
}
static gboolean
@ -320,7 +341,7 @@ gimp_circle_expose_event (GtkWidget *widget,
allocation.x + (allocation.width - size) / 2,
allocation.y + (allocation.height - size) / 2);
gimp_circle_draw_background (cr, size, circle->priv->background);
gimp_circle_draw_background (circle, cr, size, circle->priv->background);
cairo_destroy (cr);
}
@ -372,7 +393,8 @@ get_angle_and_distance (gdouble center_x,
}
static void
gimp_circle_draw_background (cairo_t *cr,
gimp_circle_draw_background (GimpCircle *circle,
cairo_t *cr,
gint size,
GimpCircleBackground background)
{
@ -392,46 +414,50 @@ gimp_circle_draw_background (cairo_t *cr,
}
else
{
cairo_surface_t *surface;
guchar *data;
gint stride;
gint x, y;
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, size, size);
data = cairo_image_surface_get_data (surface);
stride = cairo_image_surface_get_stride (surface);
for (y = 0; y < size; y++)
if (! circle->priv->surface)
{
for (x = 0; x < size; x++)
guchar *data;
gint stride;
gint x, y;
circle->priv->surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
size, size);
data = cairo_image_surface_get_data (circle->priv->surface);
stride = cairo_image_surface_get_stride (circle->priv->surface);
for (y = 0; y < size; y++)
{
gdouble angle;
gdouble distance;
guchar rgb[3] = { 0, };
angle = get_angle_and_distance (size / 2.0, size / 2.0, size / 2.0,
x, y,
&distance);
switch (background)
for (x = 0; x < size; x++)
{
case GIMP_CIRCLE_BACKGROUND_HSV:
gimp_circle_background_hsv (angle, distance, rgb);
break;
gdouble angle;
gdouble distance;
guchar rgb[3] = { 0, };
default:
break;
angle = get_angle_and_distance (size / 2.0, size / 2.0,
size / 2.0,
x, y,
&distance);
switch (background)
{
case GIMP_CIRCLE_BACKGROUND_HSV:
gimp_circle_background_hsv (angle, distance, rgb);
break;
default:
break;
}
GIMP_CAIRO_ARGB32_SET_PIXEL (data + y * stride + x * 4,
rgb[0], rgb[1], rgb[2], 255);
}
GIMP_CAIRO_ARGB32_SET_PIXEL (data + y * stride + x * 4,
rgb[0], rgb[1], rgb[2], 255);
}
cairo_surface_mark_dirty (circle->priv->surface);
}
cairo_surface_mark_dirty (surface);
cairo_set_source_surface (cr, surface, 0.0, 0.0);
cairo_surface_destroy (surface);
cairo_set_source_surface (cr, circle->priv->surface, 0.0, 0.0);
cairo_arc (cr, size / 2.0, size / 2.0, size / 2.0, 0.0, 2 * G_PI);
cairo_clip (cr);