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// 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 <stddef.h>
#include <memory>
#include "cc/trees/occlusion.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/transform.h"
namespace cc {
// Container for properties that layers need to compute before they can be
// drawn.
struct CC_EXPORT DrawProperties {
DrawProperties();
~DrawProperties();
// 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;
// Known occlusion above the layer mapped to the content space of the layer.
Occlusion occlusion_in_content_space;
// DrawProperties::opacity may be different than LayerImpl::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 screen_space_transform_is_animating;
// True if the layer needs to be clipped by clip_rect.
bool is_clipped;
// This rect is a bounding box around what part of the layer is visible, in
// the layer's coordinate space.
gfx::Rect visible_layer_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;
};
} // namespace cc
#endif // CC_LAYERS_DRAW_PROPERTIES_H_
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