Part 10 of cc/ directory shuffles: layers

cc/draw_properties.h

-// 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_DRAW_PROPERTIES_H_
-#define CC_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)
-        , 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(0)
-        , contents_scale_x(1)
-        , contents_scale_y(1)
-        , num_descendants_that_draw_content(0)
-        , descendants_can_clip_selves(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;
-
-    // XXXIsAnimating 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 clipRect.
-    bool is_clipped;
-
-    // The layer whose coordinate space this layer draws into. This can be
-    // either the same layer (m_drawProperties.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;
-};
-
-}  // namespace cc
-
-#endif  // CC_DRAW_PROPERTIES_H_