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[rectangle] Avoid modifying materials mid scene

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To improve batching of geometry in the Cogl journal we need to avoid modifying
materials midscene.

Currently cogl_set_source_color and cogl_set_source_texture simply modify a
single shared material. In the future we can improve this so they use a pool
of materials that gets recycled as the journal is flushed, but for now we
give all ClutterRectangles their own private materials for painting with.
This commit is contained in:
Robert Bragg 2009-06-05 13:03:14 +01:00
parent dc1ca79398
commit 938452f1b1
1 changed files with 55 additions and 34 deletions
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77
clutter/clutter-rectangle.c
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@ -60,8 +60,10 @@ enum
struct _ClutterRectanglePrivate
{
ClutterColor color;
ClutterColor primary_color;
CoglHandle primary_material;
ClutterColor border_color;
CoglHandle border_material;
guint border_width;
@ -78,6 +80,7 @@ clutter_rectangle_paint (ClutterActor *self)
ClutterRectanglePrivate *priv;
ClutterGeometry geom;
guint8 tmp_alpha;
guint8 opacity;
rectangle = CLUTTER_RECTANGLE(self);
priv = rectangle->priv;
@ -88,6 +91,8 @@ clutter_rectangle_paint (ClutterActor *self)
: "unknown");
clutter_actor_get_allocation_geometry (self, &geom);
opacity = clutter_actor_get_paint_opacity (self);
/* parent paint call will have translated us into position so
* paint from 0, 0
*/
@ -96,12 +101,23 @@ clutter_rectangle_paint (ClutterActor *self)
/* compute the composited opacity of the actor taking into
* account the opacity of the color set by the user
*/
tmp_alpha = clutter_actor_get_paint_opacity (self)
* priv->border_color.alpha
/ 255;
tmp_alpha = opacity * priv->border_color.alpha / 255;
/* paint the border */
cogl_set_source_color4ub (priv->border_color.red,
/* We are assuming this is a NOP when the color doesn't change.
* This is important since we should aim to never modify
* materials mid-scene. */
cogl_material_set_color4ub (priv->border_material,
priv->border_color.red,
priv->border_color.green,
priv->border_color.blue,
tmp_alpha);
cogl_set_source (priv->border_material);
cogl_material_set_color4ub (priv->border_material,
priv->border_color.red,
priv->border_color.green,
priv->border_color.blue,
tmp_alpha);
@ -124,14 +140,15 @@ clutter_rectangle_paint (ClutterActor *self)
priv->border_width,
geom.height - priv->border_width);
tmp_alpha = clutter_actor_get_paint_opacity (self)
* priv->color.alpha
/ 255;
tmp_alpha = opacity * priv->primary_color.alpha / 255;
/* now paint the rectangle */
cogl_set_source_color4ub (priv->color.red,
priv->color.green,
priv->color.blue,
cogl_set_source (priv->primary_material);
cogl_material_set_color4ub (priv->primary_material,
priv->primary_color.red,
priv->primary_color.green,
priv->primary_color.blue,
tmp_alpha);
cogl_rectangle (priv->border_width, priv->border_width,
@ -143,13 +160,15 @@ clutter_rectangle_paint (ClutterActor *self)
/* compute the composited opacity of the actor taking into
* account the opacity of the color set by the user
*/
tmp_alpha = clutter_actor_get_paint_opacity (self)
* priv->color.alpha
/ 255;
tmp_alpha = opacity * priv->primary_color.alpha / 255;
cogl_set_source_color4ub (priv->color.red,
priv->color.green,
priv->color.blue,
/* now paint the rectangle */
cogl_set_source (priv->primary_material);
cogl_material_set_color4ub (priv->primary_material,
priv->primary_color.red,
priv->primary_color.green,
priv->primary_color.blue,
tmp_alpha);
cogl_rectangle (0, 0, geom.width, geom.height);
@ -197,7 +216,7 @@ clutter_rectangle_get_property (GObject *object,
switch (prop_id)
{
case PROP_COLOR:
clutter_value_set_color (value, &priv->color);
clutter_value_set_color (value, &priv->primary_color);
break;
case PROP_BORDER_COLOR:
clutter_value_set_color (value, &priv->border_color);
@ -308,8 +327,10 @@ clutter_rectangle_init (ClutterRectangle *self)
self->priv = priv = CLUTTER_RECTANGLE_GET_PRIVATE (self);
priv->color = default_color;
priv->primary_color = default_color;
priv->border_color = default_border_color;
priv->primary_material = cogl_material_new ();
priv->border_material = cogl_material_new ();
priv->border_width = 0;
@ -364,10 +385,10 @@ clutter_rectangle_get_color (ClutterRectangle *rectangle,
priv = rectangle->priv;
color->red = priv->color.red;
color->green = priv->color.green;
color->blue = priv->color.blue;
color->alpha = priv->color.alpha;
color->red = priv->primary_color.red;
color->green = priv->primary_color.green;
color->blue = priv->primary_color.blue;
color->alpha = priv->primary_color.alpha;
}
/**
@ -390,10 +411,10 @@ clutter_rectangle_set_color (ClutterRectangle *rectangle,
priv = rectangle->priv;
priv->color.red = color->red;
priv->color.green = color->green;
priv->color.blue = color->blue;
priv->color.alpha = color->alpha;
priv->primary_color.red = color->red;
priv->primary_color.green = color->green;
priv->primary_color.blue = color->blue;
priv->primary_color.alpha = color->alpha;
#if 0
/* FIXME - appears to be causing border to always get drawn */
@ -525,7 +546,7 @@ clutter_rectangle_set_border_color (ClutterRectangle *rectangle,
priv->border_color.blue = color->blue;
priv->border_color.alpha = color->alpha;
if (clutter_color_equal (&priv->color, &priv->border_color))
if (clutter_color_equal (&priv->primary_color, &priv->border_color))
priv->has_border = FALSE;
else
priv->has_border = TRUE;