| // Copyright 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CC_LAYERS_DRAW_PROPERTIES_H_ |
| #define CC_LAYERS_DRAW_PROPERTIES_H_ |
| |
| #include "base/memory/scoped_ptr.h" |
| #include "ui/gfx/rect.h" |
| #include "ui/gfx/transform.h" |
| |
| namespace cc { |
| |
| // Container for properties that layers need to compute before they can be |
| // drawn. |
| template <typename LayerType, typename RenderSurfaceType> |
| struct CC_EXPORT DrawProperties { |
| DrawProperties() |
| : opacity(0.f), |
| opacity_is_animating(false), |
| screen_space_opacity_is_animating(false), |
| target_space_transform_is_animating(false), |
| screen_space_transform_is_animating(false), |
| can_use_lcd_text(false), |
| is_clipped(false), |
| render_target(NULL), |
| contents_scale_x(1.f), |
| contents_scale_y(1.f), |
| num_descendants_that_draw_content(0), |
| descendants_can_clip_selves(false), |
| can_draw_directly_to_backbuffer(false) {} |
| |
| // Transforms objects from content space to target surface space, where |
| // this layer would be drawn. |
| gfx::Transform target_space_transform; |
| |
| // Transforms objects from content space to screen space (viewport space). |
| gfx::Transform screen_space_transform; |
| |
| // DrawProperties::opacity may be different than LayerType::opacity, |
| // particularly in the case when a RenderSurface re-parents the layer's |
| // opacity, or when opacity is compounded by the hierarchy. |
| float opacity; |
| |
| // xxx_is_animating flags are used to indicate whether the DrawProperties |
| // are actually meaningful on the main thread. When the properties are |
| // animating, the main thread may not have the same values that are used |
| // to draw. |
| bool opacity_is_animating; |
| bool screen_space_opacity_is_animating; |
| bool target_space_transform_is_animating; |
| bool screen_space_transform_is_animating; |
| |
| // True if the layer can use LCD text. |
| bool can_use_lcd_text; |
| |
| // True if the layer needs to be clipped by clip_rect. |
| bool is_clipped; |
| |
| // The layer whose coordinate space this layer draws into. This can be |
| // either the same layer (draw_properties_.render_target == this) or an |
| // ancestor of this layer. |
| LayerType* render_target; |
| |
| // The surface that this layer and its subtree would contribute to. |
| scoped_ptr<RenderSurfaceType> render_surface; |
| |
| // This rect is in the layer's content space. |
| gfx::Rect visible_content_rect; |
| |
| // In target surface space, the rect that encloses the clipped, drawable |
| // content of the layer. |
| gfx::Rect drawable_content_rect; |
| |
| // In target surface space, the original rect that clipped this layer. This |
| // value is used to avoid unnecessarily changing GL scissor state. |
| gfx::Rect clip_rect; |
| |
| // The scale used to move between layer space and content space, and bounds |
| // of the space. One is always a function of the other, but which one |
| // depends on the layer type. For picture layers, this is an ideal scale, |
| // and not always the one used. |
| float contents_scale_x; |
| float contents_scale_y; |
| gfx::Size content_bounds; |
| |
| // Does not include this layer itself, only its children and descendants. |
| int num_descendants_that_draw_content; |
| |
| // If true, every descendant in the sub-tree can clip itself without the |
| // need to use hardware sissoring or a new render target. |
| bool descendants_can_clip_selves; |
| |
| bool can_draw_directly_to_backbuffer; |
| }; |
| |
| } // namespace cc |
| |
| #endif // CC_LAYERS_DRAW_PROPERTIES_H_ |