void
_st_paint_shadow_with_opacity (StShadow *shadow_spec,
CoglPipeline *shadow_pipeline,
ClutterActorBox *box,
guint8 paint_opacity)
{
CoglFramebuffer *fb = cogl_get_draw_framebuffer ();
ClutterActorBox shadow_box;
CoglColor color;
g_return_if_fail (shadow_spec != NULL);
g_return_if_fail (shadow_pipeline != NULL);
st_shadow_get_box (shadow_spec, box, &shadow_box);
cogl_color_init_from_4ub (&color,
shadow_spec->color.red * paint_opacity / 255,
shadow_spec->color.green * paint_opacity / 255,
shadow_spec->color.blue * paint_opacity / 255,
shadow_spec->color.alpha * paint_opacity / 255);
cogl_color_premultiply (&color);
cogl_pipeline_set_layer_combine_constant (shadow_pipeline, 0, &color);
cogl_framebuffer_draw_rectangle (fb, shadow_pipeline,
shadow_box.x1, shadow_box.y1,
shadow_box.x2, shadow_box.y2);
}
void
_st_paint_shadow_with_opacity (StShadow *shadow_spec,
CoglHandle shadow_material,
ClutterActorBox *box,
guint8 paint_opacity)
{
ClutterActorBox shadow_box;
CoglColor color;
g_return_if_fail (shadow_spec != NULL);
g_return_if_fail (shadow_material != COGL_INVALID_HANDLE);
st_shadow_get_box (shadow_spec, box, &shadow_box);
cogl_color_set_from_4ub (&color,
shadow_spec->color.red * paint_opacity / 255,
shadow_spec->color.green * paint_opacity / 255,
shadow_spec->color.blue * paint_opacity / 255,
shadow_spec->color.alpha * paint_opacity / 255);
cogl_color_premultiply (&color);
cogl_material_set_layer_combine_constant (shadow_material, 0, &color);
cogl_set_source (shadow_material);
cogl_rectangle_with_texture_coords (shadow_box.x1, shadow_box.y1,
shadow_box.x2, shadow_box.y2,
0, 0, 1, 1);
}
void
_cogl_pango_display_list_render (CoglFramebuffer *fb,
CoglPangoDisplayList *dl,
const CoglColor *color)
{
GSList *l;
for (l = dl->nodes; l; l = l->next)
{
CoglPangoDisplayListNode *node = l->data;
CoglColor draw_color;
if (node->pipeline == NULL)
{
if (node->type == COGL_PANGO_DISPLAY_LIST_TEXTURE)
node->pipeline =
_cogl_pango_pipeline_cache_get (dl->pipeline_cache,
node->d.texture.texture);
else
node->pipeline =
_cogl_pango_pipeline_cache_get (dl->pipeline_cache,
NULL);
}
if (node->color_override)
/* Use the override color but preserve the alpha from the
draw color */
cogl_color_init_from_4ub (&draw_color,
cogl_color_get_red_byte (&node->color),
cogl_color_get_green_byte (&node->color),
cogl_color_get_blue_byte (&node->color),
cogl_color_get_alpha_byte (color));
else
draw_color = *color;
cogl_color_premultiply (&draw_color);
cogl_pipeline_set_color (node->pipeline, &draw_color);
switch (node->type)
{
case COGL_PANGO_DISPLAY_LIST_TEXTURE:
_cogl_framebuffer_draw_display_list_texture (fb, node->pipeline, node);
break;
case COGL_PANGO_DISPLAY_LIST_RECTANGLE:
cogl_framebuffer_draw_rectangle (fb,
node->pipeline,
node->d.rectangle.x_1,
node->d.rectangle.y_1,
node->d.rectangle.x_2,
node->d.rectangle.y_2);
break;
case COGL_PANGO_DISPLAY_LIST_TRAPEZOID:
cogl_primitive_draw (node->d.trapezoid.primitive,
fb, node->pipeline);
break;
}
}
}
static void
aisleriot_slot_renderer_set_material_for_card (AisleriotSlotRenderer *srend,
CoglHandle tex,
gboolean show_highlight)
{
AisleriotSlotRendererPrivate *priv = srend->priv;
guint8 opacity = clutter_actor_get_paint_opacity (CLUTTER_ACTOR (srend));
if (priv->material == COGL_INVALID_HANDLE)
priv->material = cogl_material_new ();
if (show_highlight)
{
CoglColor color;
/* The previous code for drawing the highlight rendered the
normal card texture and then rendered the card again
multiplied by the highlight color but with 50%
transparency. The blend function is alpha*src+(1-alpha*dst)
where src is effectively the tex times the highlight color
and the dst is the original tex. Therefore the final color is
0.5*tex+0.5*tex*highlight which is the same as
(0.5+highlight/2)*tex. We can precompute that value to avoid
having to draw the card twice */
cogl_color_set_from_4ub (&color,
MIN (priv->highlight_color.red
/ 2 + 128, 0xff),
MIN (priv->highlight_color.green
/ 2 + 128, 0xff),
MIN (priv->highlight_color.blue
/ 2 + 128, 0xff),
opacity);
cogl_color_premultiply (&color);
cogl_material_set_color (priv->material, &color);
}
else
cogl_material_set_color4ub (priv->material,
opacity, opacity, opacity, opacity);
cogl_material_set_layer (priv->material, 0, tex);
cogl_set_source (priv->material);
}
void
cogl_set_source_color (const CoglColor *color)
{
CoglPipeline *pipeline;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (cogl_color_get_alpha_byte (color) == 0xff)
{
cogl_pipeline_set_color (ctx->opaque_color_pipeline, color);
pipeline = ctx->opaque_color_pipeline;
}
else
{
CoglColor premultiplied = *color;
cogl_color_premultiply (&premultiplied);
cogl_pipeline_set_color (ctx->blended_color_pipeline, &premultiplied);
pipeline = ctx->blended_color_pipeline;
}
cogl_set_source (pipeline);
}
/**
* meta_create_color_texture_4ub:
* @red:
* @green:
* @blue:
* @alpha:
* @flags: Optional flags for the texture, or %COGL_TEXTURE_NONE;
* %COGL_TEXTURE_NO_SLICING is useful if the texture will be
* repeated to create a constant color fill, since hardware
* repeat can't be used for a sliced texture.
*
* Creates a texture that is a single pixel with the specified
* unpremultiplied color components.
*
* Return value: (transfer full): a newly created Cogl texture
*/
CoglHandle
meta_create_color_texture_4ub (guint8 red,
guint8 green,
guint8 blue,
guint8 alpha,
CoglTextureFlags flags)
{
CoglColor color;
guint8 pixel[4];
cogl_color_set_from_4ub (&color, red, green, blue, alpha);
cogl_color_premultiply (&color);
pixel[0] = cogl_color_get_red_byte (&color);
pixel[1] = cogl_color_get_green_byte (&color);
pixel[2] = cogl_color_get_blue_byte (&color);
pixel[3] = cogl_color_get_alpha_byte (&color);
return cogl_texture_new_from_data (1, 1,
flags,
COGL_PIXEL_FORMAT_RGBA_8888_PRE,
COGL_PIXEL_FORMAT_ANY,
4, pixel);
}
void
_cogl_pango_display_list_render (CoglPangoDisplayList *dl,
const CoglColor *color)
{
GSList *l;
for (l = dl->nodes; l; l = l->next)
{
CoglPangoDisplayListNode *node = l->data;
CoglColor draw_color;
if (node->pipeline == NULL)
{
if (node->type == COGL_PANGO_DISPLAY_LIST_TEXTURE)
node->pipeline =
_cogl_pango_pipeline_cache_get (dl->pipeline_cache,
node->d.texture.texture);
else
node->pipeline =
_cogl_pango_pipeline_cache_get (dl->pipeline_cache,
NULL);
}
if (node->color_override)
/* Use the override color but preserve the alpha from the
draw color */
cogl_color_init_from_4ub (&draw_color,
cogl_color_get_red_byte (&node->color),
cogl_color_get_green_byte (&node->color),
cogl_color_get_blue_byte (&node->color),
cogl_color_get_alpha_byte (color));
else
draw_color = *color;
cogl_color_premultiply (&draw_color);
cogl_pipeline_set_color (node->pipeline, &draw_color);
cogl_push_source (node->pipeline);
switch (node->type)
{
case COGL_PANGO_DISPLAY_LIST_TEXTURE:
_cogl_pango_display_list_render_texture (node);
break;
case COGL_PANGO_DISPLAY_LIST_RECTANGLE:
cogl_rectangle (node->d.rectangle.x_1,
node->d.rectangle.y_1,
node->d.rectangle.x_2,
node->d.rectangle.y_2);
break;
case COGL_PANGO_DISPLAY_LIST_TRAPEZOID:
{
float points[8];
CoglPath *path;
points[0] = node->d.trapezoid.x_11;
points[1] = node->d.trapezoid.y_1;
points[2] = node->d.trapezoid.x_12;
points[3] = node->d.trapezoid.y_2;
points[4] = node->d.trapezoid.x_22;
points[5] = node->d.trapezoid.y_2;
points[6] = node->d.trapezoid.x_21;
points[7] = node->d.trapezoid.y_1;
path = cogl_path_new ();
cogl_path_polygon (path, points, 4);
cogl_path_fill (path);
cogl_object_unref (path);
}
break;
}
cogl_pop_source ();
}
}
static void _clone_paint_cb (ClutterActor *actor) {
ClutterActor *source;
ClutterActorBox box;
CoglHandle material;
gfloat width, height;
guint8 opacity;
CoglColor color_1, color_2;
CoglTextureVertex vertices[4];
/* if we don't have a source actor, don't paint */
source = clutter_clone_get_source (CLUTTER_CLONE (actor));
if (source == NULL)
goto out;
/* if the source texture does not have any content, don't paint */
material = clutter_texture_get_cogl_material (CLUTTER_TEXTURE (source));
if (material == NULL)
goto out;
/* get the size of the reflection */
clutter_actor_get_allocation_box (actor, &box);
clutter_actor_box_get_size (&box, &width, &height);
/* get the composite opacity of the actor */
opacity = clutter_actor_get_paint_opacity (actor);
/* figure out the two colors for the reflection: the first is
* full color and the second is the same, but at 0 opacity
*/
cogl_color_init_from_4f (&color_1, 1.0, 1.0, 1.0, opacity / 255.0);
cogl_color_premultiply (&color_1);
cogl_color_init_from_4f (&color_2, 1.0, 1.0, 1.0, 0.0);
cogl_color_premultiply (&color_2);
/* now describe the four vertices of the quad; since it has
* to be a reflection, we need to invert it as well
*/
vertices[0].x = 0; vertices[0].y = 0; vertices[0].z = 0;
vertices[0].tx = 0.0; vertices[0].ty = 1.0;
vertices[0].color = color_1;
vertices[1].x = width; vertices[1].y = 0; vertices[1].z = 0;
vertices[1].tx = 1.0; vertices[1].ty = 1.0;
vertices[1].color = color_1;
vertices[2].x = width; vertices[2].y = height; vertices[2].z = 0;
vertices[2].tx = 1.0; vertices[2].ty = 0.0;
vertices[2].color = color_2;
vertices[3].x = 0; vertices[3].y = height; vertices[3].z = 0;
vertices[3].tx = 0.0; vertices[3].ty = 0.0;
vertices[3].color = color_2;
/* paint the same texture but with a different geometry */
cogl_set_source (material);
cogl_polygon (vertices, 4, TRUE);
out:
/* prevent the default clone handler from running */
g_signal_stop_emission_by_name (actor, "paint");
}
