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colorscale: Cache hue texture

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Otherwise we regenerate a new one on every snapshot() call.
This commit is contained in:
Timm Bäder 2018-11-23 10:57:50 +01:00 committed by Timm Bäder
parent 6466e53bfc
commit 059d9376da
1 changed files with 59 additions and 33 deletions
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92
gtk/gtkcolorscale.c
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@ -36,6 +36,7 @@ typedef struct
{
GdkRGBA color;
GtkColorScaleType type;
GdkTexture *hue_texture;
} GtkColorScalePrivate;
enum
@ -63,45 +64,59 @@ gtk_color_scale_snapshot_trough (GtkColorScale *scale,
if (width <= 1 || height <= 1)
return;
if (priv->hue_texture &&
(width != gdk_texture_get_width (priv->hue_texture) ||
height != gdk_texture_get_height (priv->hue_texture)))
g_clear_object (&priv->hue_texture);
if (priv->type == GTK_COLOR_SCALE_HUE)
{
GdkTexture *texture;
gint stride;
GBytes *bytes;
guchar *data, *p;
gdouble h;
gdouble r, g, b;
gdouble f;
int hue_x, hue_y;
stride = width * 3;
data = g_malloc (width * height * 3);
f = 1.0 / (height - 1);
for (hue_y = 0; hue_y < height; hue_y++)
if (!priv->hue_texture)
{
h = CLAMP (hue_y * f, 0.0, 1.0);
p = data + hue_y * stride;
for (hue_x = 0; hue_x < stride; hue_x += 3)
GdkTexture *texture;
gint stride;
GBytes *bytes;
guchar *data, *p;
gdouble h;
gdouble r, g, b;
gdouble f;
int hue_x, hue_y;
stride = width * 3;
data = g_malloc (width * height * 3);
f = 1.0 / (height - 1);
for (hue_y = 0; hue_y < height; hue_y++)
{
gtk_hsv_to_rgb (h, 1, 1, &r, &g, &b);
p[hue_x + 0] = CLAMP (r * 255, 0, 255);
p[hue_x + 1] = CLAMP (g * 255, 0, 255);
p[hue_x + 2] = CLAMP (b * 255, 0, 255);
h = CLAMP (hue_y * f, 0.0, 1.0);
p = data + hue_y * stride;
for (hue_x = 0; hue_x < stride; hue_x += 3)
{
gtk_hsv_to_rgb (h, 1, 1, &r, &g, &b);
p[hue_x + 0] = CLAMP (r * 255, 0, 255);
p[hue_x + 1] = CLAMP (g * 255, 0, 255);
p[hue_x + 2] = CLAMP (b * 255, 0, 255);
}
}
bytes = g_bytes_new_take (data, width * height * 3);
texture = gdk_memory_texture_new (width, height,
GDK_MEMORY_R8G8B8,
bytes,
stride);
g_bytes_unref (bytes);
gtk_snapshot_append_texture (snapshot,
texture,
&GRAPHENE_RECT_INIT(0, 0, width, height));
priv->hue_texture = texture;
}
else
{
gtk_snapshot_append_texture (snapshot,
priv->hue_texture,
&GRAPHENE_RECT_INIT(0, 0, width, height));
}
bytes = g_bytes_new_take (data, width * height * 3);
texture = gdk_memory_texture_new (width, height,
GDK_MEMORY_R8G8B8,
bytes,
stride);
g_bytes_unref (bytes);
gtk_snapshot_append_texture (snapshot,
texture,
&GRAPHENE_RECT_INIT(0, 0, width, height));
g_object_unref (texture);
}
else if (priv->type == GTK_COLOR_SCALE_ALPHA)
{
@ -242,11 +257,22 @@ hold_action (GtkGestureLongPress *gesture,
g_signal_emit_by_name (scale, "popup-menu", &handled);
}
static void
scale_finalize (GObject *object)
{
GtkColorScalePrivate *priv = gtk_color_scale_get_instance_private (GTK_COLOR_SCALE (object));
g_clear_object (&priv->hue_texture);
G_OBJECT_CLASS (gtk_color_scale_parent_class)->finalize (object);
}
static void
gtk_color_scale_class_init (GtkColorScaleClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
object_class->finalize = scale_finalize;
object_class->get_property = scale_get_property;
object_class->set_property = scale_set_property;