/* * Authored By Neil Roberts * and Jasper St. Pierre * * Copyright (C) 2008 Intel Corporation * Copyright (C) 2012 Red Hat, Inc. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA * 02111-1307, USA. */ /** * SECTION:meta-shaped-texture * @title: MetaShapedTexture * @short_description: An actor to draw a masked texture. */ #include #include #include #include "clutter-utils.h" #include "meta-texture-tower.h" #include "meta-shaped-texture-private.h" #include #include #include /* for gdk_rectangle_intersect() */ #include "meta-cullable.h" static void meta_shaped_texture_dispose (GObject *object); static void meta_shaped_texture_paint (ClutterActor *actor); static void meta_shaped_texture_pick (ClutterActor *actor, const ClutterColor *color); static void meta_shaped_texture_get_preferred_width (ClutterActor *self, gfloat for_height, gfloat *min_width_p, gfloat *natural_width_p); static void meta_shaped_texture_get_preferred_height (ClutterActor *self, gfloat for_width, gfloat *min_height_p, gfloat *natural_height_p); static gboolean meta_shaped_texture_get_paint_volume (ClutterActor *self, ClutterPaintVolume *volume); static void cullable_iface_init (MetaCullableInterface *iface); G_DEFINE_TYPE_WITH_CODE (MetaShapedTexture, meta_shaped_texture, CLUTTER_TYPE_ACTOR, G_IMPLEMENT_INTERFACE (META_TYPE_CULLABLE, cullable_iface_init)); #define META_SHAPED_TEXTURE_GET_PRIVATE(obj) \ (G_TYPE_INSTANCE_GET_PRIVATE ((obj), META_TYPE_SHAPED_TEXTURE, \ MetaShapedTexturePrivate)) struct _MetaShapedTexturePrivate { MetaTextureTower *paint_tower; CoglTexture *texture; CoglTexture *mask_texture; cairo_region_t *clip_region; cairo_region_t *input_shape_region; cairo_region_t *opaque_region; guint tex_width, tex_height; guint create_mipmaps : 1; }; static void meta_shaped_texture_class_init (MetaShapedTextureClass *klass) { GObjectClass *gobject_class = (GObjectClass *) klass; ClutterActorClass *actor_class = (ClutterActorClass *) klass; gobject_class->dispose = meta_shaped_texture_dispose; actor_class->get_preferred_width = meta_shaped_texture_get_preferred_width; actor_class->get_preferred_height = meta_shaped_texture_get_preferred_height; actor_class->paint = meta_shaped_texture_paint; actor_class->pick = meta_shaped_texture_pick; actor_class->get_paint_volume = meta_shaped_texture_get_paint_volume; g_type_class_add_private (klass, sizeof (MetaShapedTexturePrivate)); } static void meta_shaped_texture_init (MetaShapedTexture *self) { MetaShapedTexturePrivate *priv; priv = self->priv = META_SHAPED_TEXTURE_GET_PRIVATE (self); priv->paint_tower = meta_texture_tower_new (); priv->texture = NULL; priv->mask_texture = NULL; priv->create_mipmaps = TRUE; } static void set_clip_region (MetaShapedTexture *self, cairo_region_t *clip_region) { MetaShapedTexturePrivate *priv = self->priv; g_clear_pointer (&priv->clip_region, (GDestroyNotify) cairo_region_destroy); if (clip_region) priv->clip_region = cairo_region_copy (clip_region); } static void meta_shaped_texture_dispose (GObject *object) { MetaShapedTexture *self = (MetaShapedTexture *) object; MetaShapedTexturePrivate *priv = self->priv; if (priv->paint_tower) meta_texture_tower_free (priv->paint_tower); priv->paint_tower = NULL; g_clear_pointer (&priv->texture, cogl_object_unref); g_clear_pointer (&priv->opaque_region, cairo_region_destroy); meta_shaped_texture_set_mask_texture (self, NULL); set_clip_region (self, NULL); G_OBJECT_CLASS (meta_shaped_texture_parent_class)->dispose (object); } static CoglPipeline * get_unmasked_pipeline (CoglContext *ctx) { return cogl_pipeline_new (ctx); } static CoglPipeline * get_masked_pipeline (CoglContext *ctx) { static CoglPipeline *template = NULL; if (G_UNLIKELY (template == NULL)) { template = cogl_pipeline_new (ctx); cogl_pipeline_set_layer_combine (template, 1, "RGBA = MODULATE (PREVIOUS, TEXTURE[A])", NULL); } return cogl_pipeline_copy (template); } static CoglPipeline * get_unblended_pipeline (CoglContext *ctx) { static CoglPipeline *template = NULL; if (G_UNLIKELY (template == NULL)) { CoglColor color; template = cogl_pipeline_new (ctx); cogl_color_init_from_4ub (&color, 255, 255, 255, 255); cogl_pipeline_set_blend (template, "RGBA = ADD (SRC_COLOR, 0)", NULL); cogl_pipeline_set_color (template, &color); } return cogl_pipeline_copy (template); } static void paint_clipped_rectangle (CoglFramebuffer *fb, CoglPipeline *pipeline, cairo_rectangle_int_t *rect, ClutterActorBox *alloc) { float coords[8]; float x1, y1, x2, y2; x1 = rect->x; y1 = rect->y; x2 = rect->x + rect->width; y2 = rect->y + rect->height; coords[0] = rect->x / (alloc->x2 - alloc->x1); coords[1] = rect->y / (alloc->y2 - alloc->y1); coords[2] = (rect->x + rect->width) / (alloc->x2 - alloc->x1); coords[3] = (rect->y + rect->height) / (alloc->y2 - alloc->y1); coords[4] = coords[0]; coords[5] = coords[1]; coords[6] = coords[2]; coords[7] = coords[3]; cogl_framebuffer_draw_multitextured_rectangle (fb, pipeline, x1, y1, x2, y2, &coords[0], 8); } static void set_cogl_texture (MetaShapedTexture *stex, CoglTexture *cogl_tex) { MetaShapedTexturePrivate *priv; guint width, height; g_return_if_fail (META_IS_SHAPED_TEXTURE (stex)); priv = stex->priv; if (priv->texture) cogl_object_unref (priv->texture); priv->texture = cogl_object_ref (cogl_tex); if (cogl_tex != NULL) { width = cogl_texture_get_width (COGL_TEXTURE (cogl_tex)); height = cogl_texture_get_height (COGL_TEXTURE (cogl_tex)); if (width != priv->tex_width || height != priv->tex_height) { priv->tex_width = width; priv->tex_height = height; clutter_actor_queue_relayout (CLUTTER_ACTOR (stex)); } } else { /* size changed to 0 going to an invalid handle */ priv->tex_width = 0; priv->tex_height = 0; clutter_actor_queue_relayout (CLUTTER_ACTOR (stex)); } /* NB: We don't queue a redraw of the actor here because we don't * know how much of the buffer has changed with respect to the * previous buffer. We only queue a redraw in response to surface * damage. */ if (priv->create_mipmaps) meta_texture_tower_set_base_texture (priv->paint_tower, cogl_tex); } static void meta_shaped_texture_paint (ClutterActor *actor) { MetaShapedTexture *stex = (MetaShapedTexture *) actor; MetaShapedTexturePrivate *priv = stex->priv; guint tex_width, tex_height; guchar opacity; CoglContext *ctx; CoglFramebuffer *fb; CoglPipeline *pipeline = NULL; CoglTexture *paint_tex; ClutterActorBox alloc; cairo_region_t *blended_region = NULL; CoglPipelineFilter filter; if (priv->clip_region && cairo_region_is_empty (priv->clip_region)) return; if (!CLUTTER_ACTOR_IS_REALIZED (CLUTTER_ACTOR (stex))) clutter_actor_realize (CLUTTER_ACTOR (stex)); /* The GL EXT_texture_from_pixmap extension does allow for it to be * used together with SGIS_generate_mipmap, however this is very * rarely supported. Also, even when it is supported there * are distinct performance implications from: * * - Updating mipmaps that we don't need * - Having to reallocate pixmaps on the server into larger buffers * * So, we just unconditionally use our mipmap emulation code. If we * wanted to use SGIS_generate_mipmap, we'd have to query COGL to * see if it was supported (no API currently), and then if and only * if that was the case, set the clutter texture quality to HIGH. * Setting the texture quality to high without SGIS_generate_mipmap * support for TFP textures will result in fallbacks to XGetImage. */ if (priv->create_mipmaps) paint_tex = meta_texture_tower_get_paint_texture (priv->paint_tower); else paint_tex = COGL_TEXTURE (priv->texture); if (paint_tex == NULL) return; tex_width = priv->tex_width; tex_height = priv->tex_height; if (tex_width == 0 || tex_height == 0) /* no contents yet */ return; /* Use nearest-pixel interpolation if the texture is unscaled. This * improves performance, especially with software rendering. */ filter = COGL_PIPELINE_FILTER_LINEAR; if (!clutter_actor_is_in_clone_paint (actor) && meta_actor_is_untransformed (actor, NULL, NULL)) filter = COGL_PIPELINE_FILTER_NEAREST; ctx = clutter_backend_get_cogl_context (clutter_get_default_backend ()); fb = cogl_get_draw_framebuffer (); opacity = clutter_actor_get_paint_opacity (actor); clutter_actor_get_allocation_box (actor, &alloc); if (priv->opaque_region != NULL && opacity == 255) { CoglPipeline *opaque_pipeline; cairo_region_t *region; int n_rects; int i; if (priv->clip_region != NULL) { region = cairo_region_copy (priv->clip_region); cairo_region_intersect (region, priv->opaque_region); } else { region = cairo_region_reference (priv->opaque_region); } if (cairo_region_is_empty (region)) goto paint_blended; opaque_pipeline = get_unblended_pipeline (ctx); cogl_pipeline_set_layer_texture (opaque_pipeline, 0, paint_tex); cogl_pipeline_set_layer_filters (opaque_pipeline, 0, filter, filter); n_rects = cairo_region_num_rectangles (region); for (i = 0; i < n_rects; i++) { cairo_rectangle_int_t rect; cairo_region_get_rectangle (region, i, &rect); paint_clipped_rectangle (fb, opaque_pipeline, &rect, &alloc); } cogl_object_unref (opaque_pipeline); if (priv->clip_region != NULL) { blended_region = cairo_region_copy (priv->clip_region); } else { cairo_rectangle_int_t rect = { 0, 0, tex_width, tex_height }; blended_region = cairo_region_create_rectangle (&rect); } cairo_region_subtract (blended_region, priv->opaque_region); paint_blended: cairo_region_destroy (region); } if (blended_region == NULL && priv->clip_region != NULL) blended_region = cairo_region_reference (priv->clip_region); if (blended_region != NULL && cairo_region_is_empty (blended_region)) goto out; if (priv->mask_texture == NULL) { pipeline = get_unmasked_pipeline (ctx); } else { pipeline = get_masked_pipeline (ctx); cogl_pipeline_set_layer_texture (pipeline, 1, priv->mask_texture); cogl_pipeline_set_layer_filters (pipeline, 1, filter, filter); } cogl_pipeline_set_layer_texture (pipeline, 0, paint_tex); cogl_pipeline_set_layer_filters (pipeline, 0, filter, filter); { CoglColor color; cogl_color_init_from_4ub (&color, opacity, opacity, opacity, opacity); cogl_pipeline_set_color (pipeline, &color); } if (blended_region != NULL) { int n_rects; /* Limit to how many separate rectangles we'll draw; beyond this just * fall back and draw the whole thing */ # define MAX_RECTS 16 n_rects = cairo_region_num_rectangles (blended_region); if (n_rects <= MAX_RECTS) { int i; cairo_rectangle_int_t tex_rect = { 0, 0, tex_width, tex_height }; for (i = 0; i < n_rects; i++) { cairo_rectangle_int_t rect; cairo_region_get_rectangle (blended_region, i, &rect); if (!gdk_rectangle_intersect (&tex_rect, &rect, &rect)) continue; paint_clipped_rectangle (fb, pipeline, &rect, &alloc); } goto out; } } cogl_framebuffer_draw_rectangle (fb, pipeline, 0, 0, alloc.x2 - alloc.x1, alloc.y2 - alloc.y1); out: if (pipeline != NULL) cogl_object_unref (pipeline); if (blended_region != NULL) cairo_region_destroy (blended_region); } static void meta_shaped_texture_pick (ClutterActor *actor, const ClutterColor *color) { MetaShapedTexture *stex = (MetaShapedTexture *) actor; MetaShapedTexturePrivate *priv = stex->priv; if (!clutter_actor_should_pick_paint (actor) || (priv->clip_region && cairo_region_is_empty (priv->clip_region))) return; /* If there is no region then use the regular pick */ if (priv->input_shape_region == NULL) CLUTTER_ACTOR_CLASS (meta_shaped_texture_parent_class)->pick (actor, color); else { int n_rects; float *rectangles; int i; CoglPipeline *pipeline; CoglContext *ctx; CoglFramebuffer *fb; CoglColor cogl_color; /* Note: We don't bother trying to intersect the pick and clip regions * since needing to copy the region, do the intersection, and probably * increase the number of rectangles seems more likely to have a negative * effect. * * NB: Most of the time when just using rectangles for picking then * picking shouldn't involve any rendering, and minimizing the number of * rectangles has more benefit than reducing the area of the pick * region. */ n_rects = cairo_region_num_rectangles (priv->input_shape_region); rectangles = g_alloca (sizeof (float) * 4 * n_rects); for (i = 0; i < n_rects; i++) { cairo_rectangle_int_t rect; int pos = i * 4; cairo_region_get_rectangle (priv->input_shape_region, i, &rect); rectangles[pos] = rect.x; rectangles[pos + 1] = rect.y; rectangles[pos + 2] = rect.x + rect.width; rectangles[pos + 3] = rect.y + rect.height; } ctx = clutter_backend_get_cogl_context (clutter_get_default_backend ()); fb = cogl_get_draw_framebuffer (); cogl_color_init_from_4ub (&cogl_color, color->red, color->green, color->blue, color->alpha); pipeline = cogl_pipeline_new (ctx); cogl_pipeline_set_color (pipeline, &cogl_color); cogl_framebuffer_draw_rectangles (fb, pipeline, rectangles, n_rects); cogl_object_unref (pipeline); } } static void meta_shaped_texture_get_preferred_width (ClutterActor *self, gfloat for_height, gfloat *min_width_p, gfloat *natural_width_p) { MetaShapedTexturePrivate *priv; g_return_if_fail (META_IS_SHAPED_TEXTURE (self)); priv = META_SHAPED_TEXTURE (self)->priv; if (min_width_p) *min_width_p = 0; if (natural_width_p) *natural_width_p = priv->tex_width; } static void meta_shaped_texture_get_preferred_height (ClutterActor *self, gfloat for_width, gfloat *min_height_p, gfloat *natural_height_p) { MetaShapedTexturePrivate *priv; g_return_if_fail (META_IS_SHAPED_TEXTURE (self)); priv = META_SHAPED_TEXTURE (self)->priv; if (min_height_p) *min_height_p = 0; if (natural_height_p) *natural_height_p = priv->tex_height; } static gboolean meta_shaped_texture_get_paint_volume (ClutterActor *self, ClutterPaintVolume *volume) { return clutter_paint_volume_set_from_allocation (volume, self); } void meta_shaped_texture_set_create_mipmaps (MetaShapedTexture *stex, gboolean create_mipmaps) { MetaShapedTexturePrivate *priv; g_return_if_fail (META_IS_SHAPED_TEXTURE (stex)); priv = stex->priv; create_mipmaps = create_mipmaps != FALSE; if (create_mipmaps != priv->create_mipmaps) { CoglTexture *base_texture; priv->create_mipmaps = create_mipmaps; base_texture = create_mipmaps ? priv->texture : NULL; meta_texture_tower_set_base_texture (priv->paint_tower, base_texture); } } void meta_shaped_texture_set_mask_texture (MetaShapedTexture *stex, CoglTexture *mask_texture) { MetaShapedTexturePrivate *priv; g_return_if_fail (META_IS_SHAPED_TEXTURE (stex)); priv = stex->priv; g_clear_pointer (&priv->mask_texture, cogl_object_unref); if (mask_texture != NULL) { priv->mask_texture = mask_texture; cogl_object_ref (priv->mask_texture); } clutter_actor_queue_redraw (CLUTTER_ACTOR (stex)); } static gboolean get_clip (MetaShapedTexture *stex, int x, int y, int width, int height, cairo_rectangle_int_t *clip) { ClutterActor *self = CLUTTER_ACTOR (stex); MetaShapedTexturePrivate *priv; ClutterActorBox allocation; float scale_x; float scale_y; /* NB: clutter_actor_queue_redraw_with_clip expects a box in the actor's * coordinate space so we need to convert from surface coordinates to * actor coordinates... */ /* Calling clutter_actor_get_allocation_box() is enormously expensive * if the actor has an out-of-date allocation, since it triggers * a full redraw. clutter_actor_queue_redraw_with_clip() would redraw * the whole stage anyways in that case, so just go ahead and do * it here. */ if (!clutter_actor_has_allocation (self)) return FALSE; priv = stex->priv; if (priv->tex_width == 0 || priv->tex_height == 0) return FALSE; clutter_actor_get_allocation_box (self, &allocation); scale_x = (allocation.x2 - allocation.x1) / priv->tex_width; scale_y = (allocation.y2 - allocation.y1) / priv->tex_height; clip->x = x * scale_x; clip->y = y * scale_y; clip->width = width * scale_x; clip->height = height * scale_y; return TRUE; } /** * meta_shaped_texture_update_area: * @stex: #MetaShapedTexture * @x: the x coordinate of the damaged area * @y: the y coordinate of the damaged area * @width: the width of the damaged area * @height: the height of the damaged area * @unobscured_region: The unobscured region of the window or %NULL if * there is no valid one (like when the actor is transformed or * has a mapped clone) * * Repairs the damaged area indicated by @x, @y, @width and @height * and queues a redraw for the intersection @unobscured_region and * the damage area. If @unobscured_region is %NULL a redraw will always * get queued. * * Return value: Whether a redraw have been queued or not */ gboolean meta_shaped_texture_update_area (MetaShapedTexture *stex, int x, int y, int width, int height, cairo_region_t *unobscured_region) { MetaShapedTexturePrivate *priv; cairo_rectangle_int_t clip; gboolean has_clip; priv = stex->priv; if (priv->texture == NULL) return FALSE; meta_texture_tower_update_area (priv->paint_tower, x, y, width, height); has_clip = get_clip (stex, x, y, width, height, &clip); if (unobscured_region) { cairo_region_t *intersection; if (cairo_region_is_empty (unobscured_region)) return FALSE; intersection = cairo_region_copy (unobscured_region); if (has_clip) cairo_region_intersect_rectangle (intersection, &clip); if (!cairo_region_is_empty (intersection)) { cairo_rectangle_int_t damage_rect; cairo_region_get_extents (intersection, &damage_rect); clutter_actor_queue_redraw_with_clip (CLUTTER_ACTOR (stex), &damage_rect); cairo_region_destroy (intersection); return TRUE; } cairo_region_destroy (intersection); return FALSE; } if (has_clip) clutter_actor_queue_redraw_with_clip (CLUTTER_ACTOR (stex), &clip); else clutter_actor_queue_redraw (CLUTTER_ACTOR (stex)); return TRUE; } /** * meta_shaped_texture_set_texture: * @stex: The #MetaShapedTexture * @pixmap: The #CoglTexture to display */ void meta_shaped_texture_set_texture (MetaShapedTexture *stex, CoglTexture *texture) { g_return_if_fail (META_IS_SHAPED_TEXTURE (stex)); set_cogl_texture (stex, texture); } /** * meta_shaped_texture_get_texture: * @stex: The #MetaShapedTexture * * Returns: (transfer none): the unshaped texture */ CoglTexture * meta_shaped_texture_get_texture (MetaShapedTexture *stex) { g_return_val_if_fail (META_IS_SHAPED_TEXTURE (stex), NULL); return COGL_TEXTURE (stex->priv->texture); } /** * meta_shaped_texture_set_input_shape_region: * @stex: a #MetaShapedTexture * @shape_region: the region of the texture that should respond to * input. * * Determines what region of the texture should accept input. For * X based windows this is defined by the ShapeInput region of the * window. */ void meta_shaped_texture_set_input_shape_region (MetaShapedTexture *stex, cairo_region_t *shape_region) { MetaShapedTexturePrivate *priv; g_return_if_fail (META_IS_SHAPED_TEXTURE (stex)); priv = stex->priv; if (priv->input_shape_region != NULL) { cairo_region_destroy (priv->input_shape_region); priv->input_shape_region = NULL; } if (shape_region != NULL) { cairo_region_reference (shape_region); priv->input_shape_region = shape_region; } clutter_actor_queue_redraw (CLUTTER_ACTOR (stex)); } /** * meta_shaped_texture_set_opaque_region: * @stex: a #MetaShapedTexture * @opaque_region: (transfer full): the region of the texture that * can have blending turned off. * * As most windows have a large portion that does not require blending, * we can easily turn off blending if we know the areas that do not * require blending. This sets the region where we will not blend for * optimization purposes. */ void meta_shaped_texture_set_opaque_region (MetaShapedTexture *stex, cairo_region_t *opaque_region) { MetaShapedTexturePrivate *priv; g_return_if_fail (META_IS_SHAPED_TEXTURE (stex)); priv = stex->priv; if (priv->opaque_region) cairo_region_destroy (priv->opaque_region); if (opaque_region) priv->opaque_region = cairo_region_reference (opaque_region); else priv->opaque_region = NULL; } /** * meta_shaped_texture_get_image: * @stex: A #MetaShapedTexture * @clip: A clipping rectangle, to help prevent extra processing. * In the case that the clipping rectangle is partially or fully * outside the bounds of the texture, the rectangle will be clipped. * * Flattens the two layers of the shaped texture into one ARGB32 * image by alpha blending the two images, and returns the flattened * image. * * Returns: (transfer full): a new cairo surface to be freed with * cairo_surface_destroy(). */ cairo_surface_t * meta_shaped_texture_get_image (MetaShapedTexture *stex, cairo_rectangle_int_t *clip) { CoglTexture *texture, *mask_texture; cairo_rectangle_int_t texture_rect = { 0, 0, 0, 0 }; cairo_surface_t *surface; g_return_val_if_fail (META_IS_SHAPED_TEXTURE (stex), NULL); texture = COGL_TEXTURE (stex->priv->texture); if (texture == NULL) return NULL; texture_rect.width = cogl_texture_get_width (texture); texture_rect.height = cogl_texture_get_height (texture); if (clip != NULL) { /* GdkRectangle is just a typedef of cairo_rectangle_int_t, * so we can use the gdk_rectangle_* APIs on these. */ if (!gdk_rectangle_intersect (&texture_rect, clip, clip)) return NULL; } if (clip != NULL) texture = cogl_texture_new_from_sub_texture (texture, clip->x, clip->y, clip->width, clip->height); surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, cogl_texture_get_width (texture), cogl_texture_get_height (texture)); cogl_texture_get_data (texture, CLUTTER_CAIRO_FORMAT_ARGB32, cairo_image_surface_get_stride (surface), cairo_image_surface_get_data (surface)); cairo_surface_mark_dirty (surface); if (clip != NULL) cogl_object_unref (texture); mask_texture = stex->priv->mask_texture; if (mask_texture != NULL) { cairo_t *cr; cairo_surface_t *mask_surface; if (clip != NULL) mask_texture = cogl_texture_new_from_sub_texture (mask_texture, clip->x, clip->y, clip->width, clip->height); mask_surface = cairo_image_surface_create (CAIRO_FORMAT_A8, cogl_texture_get_width (mask_texture), cogl_texture_get_height (mask_texture)); cogl_texture_get_data (mask_texture, COGL_PIXEL_FORMAT_A_8, cairo_image_surface_get_stride (mask_surface), cairo_image_surface_get_data (mask_surface)); cairo_surface_mark_dirty (mask_surface); cr = cairo_create (surface); cairo_set_source_surface (cr, mask_surface, 0, 0); cairo_set_operator (cr, CAIRO_OPERATOR_DEST_IN); cairo_paint (cr); cairo_destroy (cr); cairo_surface_destroy (mask_surface); if (clip != NULL) cogl_object_unref (mask_texture); } return surface; } static void meta_shaped_texture_cull_out (MetaCullable *cullable, cairo_region_t *unobscured_region, cairo_region_t *clip_region) { MetaShapedTexture *self = META_SHAPED_TEXTURE (cullable); MetaShapedTexturePrivate *priv = self->priv; set_clip_region (self, clip_region); if (clutter_actor_get_paint_opacity (CLUTTER_ACTOR (self)) == 0xff) { if (priv->opaque_region) { cairo_region_subtract (unobscured_region, priv->opaque_region); cairo_region_subtract (clip_region, priv->opaque_region); } } } static void meta_shaped_texture_reset_culling (MetaCullable *cullable) { MetaShapedTexture *self = META_SHAPED_TEXTURE (cullable); set_clip_region (self, NULL); } static void cullable_iface_init (MetaCullableInterface *iface) { iface->cull_out = meta_shaped_texture_cull_out; iface->reset_culling = meta_shaped_texture_reset_culling; } ClutterActor * meta_shaped_texture_new (void) { return g_object_new (META_TYPE_SHAPED_TEXTURE, NULL); }