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