// Copyright 2011 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_RENDER_SURFACE_IMPL_H_
#define CC_LAYERS_RENDER_SURFACE_IMPL_H_

#include <stddef.h>

#include <string>
#include <vector>

#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "cc/base/cc_export.h"
#include "cc/layers/layer_collections.h"
#include "cc/quads/render_pass.h"
#include "cc/quads/shared_quad_state.h"
#include "cc/trees/occlusion.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/rect_f.h"
#include "ui/gfx/transform.h"

namespace cc {

class DamageTracker;
class Occlusion;
class RenderPassId;
class RenderPassSink;
class LayerImpl;
class LayerIterator;

struct AppendQuadsData;

class CC_EXPORT RenderSurfaceImpl {
 public:
  explicit RenderSurfaceImpl(LayerImpl* owning_layer);
  virtual ~RenderSurfaceImpl();

  gfx::PointF ContentRectCenter() const {
    return gfx::RectF(content_rect()).CenterPoint();
  }

  // Returns the rect that encloses the RenderSurfaceImpl including any
  // reflection.
  gfx::RectF DrawableContentRect() const;

  void SetDrawOpacity(float opacity) {
    draw_properties_.draw_opacity = opacity;
  }
  float draw_opacity() const { return draw_properties_.draw_opacity; }

  void SetNearestOcclusionImmuneAncestor(RenderSurfaceImpl* surface) {
    nearest_occlusion_immune_ancestor_ = surface;
  }
  const RenderSurfaceImpl* nearest_occlusion_immune_ancestor() const {
    return nearest_occlusion_immune_ancestor_;
  }

  SkColor GetDebugBorderColor() const;
  SkColor GetReplicaDebugBorderColor() const;

  float GetDebugBorderWidth() const;
  float GetReplicaDebugBorderWidth() const;

  void SetDrawTransform(const gfx::Transform& draw_transform) {
    draw_properties_.draw_transform = draw_transform;
  }
  const gfx::Transform& draw_transform() const {
    return draw_properties_.draw_transform;
  }

  void SetScreenSpaceTransform(const gfx::Transform& screen_space_transform) {
    draw_properties_.screen_space_transform = screen_space_transform;
  }
  const gfx::Transform& screen_space_transform() const {
    return draw_properties_.screen_space_transform;
  }

  void SetReplicaDrawTransform(const gfx::Transform& replica_draw_transform) {
    draw_properties_.replica_draw_transform = replica_draw_transform;
  }
  const gfx::Transform& replica_draw_transform() const {
    return draw_properties_.replica_draw_transform;
  }

  void SetReplicaScreenSpaceTransform(
      const gfx::Transform& replica_screen_space_transform) {
    draw_properties_.replica_screen_space_transform =
        replica_screen_space_transform;
  }
  const gfx::Transform& replica_screen_space_transform() const {
    return draw_properties_.replica_screen_space_transform;
  }

  void SetIsClipped(bool is_clipped) {
    draw_properties_.is_clipped = is_clipped;
  }
  bool is_clipped() const { return draw_properties_.is_clipped; }

  void SetClipRect(const gfx::Rect& clip_rect);
  gfx::Rect clip_rect() const { return draw_properties_.clip_rect; }

  // When false, the RenderSurface does not contribute to another target
  // RenderSurface that is being drawn for the current frame. It could still be
  // drawn to as a target, but its output will not be a part of any other
  // surface.
  bool contributes_to_drawn_surface() const {
    return contributes_to_drawn_surface_;
  }
  void set_contributes_to_drawn_surface(bool contributes_to_drawn_surface) {
    contributes_to_drawn_surface_ = contributes_to_drawn_surface;
  }

  void SetContentRect(const gfx::Rect& content_rect);
  gfx::Rect content_rect() const { return draw_properties_.content_rect; }

  void SetAccumulatedContentRect(const gfx::Rect& content_rect);
  gfx::Rect accumulated_content_rect() const {
    return accumulated_content_rect_;
  }

  const Occlusion& occlusion_in_content_space() const {
    return occlusion_in_content_space_;
  }
  void set_occlusion_in_content_space(const Occlusion& occlusion) {
    occlusion_in_content_space_ = occlusion;
  }

  LayerImplList& layer_list() { return layer_list_; }
  void ClearLayerLists();

  int OwningLayerId() const;
  bool HasReplica() const;
  const LayerImpl* ReplicaLayer() const;

  void ResetPropertyChangedFlag() { surface_property_changed_ = false; }
  bool SurfacePropertyChanged() const;
  bool SurfacePropertyChangedOnlyFromDescendant() const;

  DamageTracker* damage_tracker() const { return damage_tracker_.get(); }

  RenderPassId GetRenderPassId();

  void AppendRenderPasses(RenderPassSink* pass_sink);
  void AppendQuads(RenderPass* render_pass,
                   const gfx::Transform& draw_transform,
                   const Occlusion& occlusion_in_content_space,
                   SkColor debug_border_color,
                   float debug_border_width,
                   LayerImpl* mask_layer,
                   AppendQuadsData* append_quads_data,
                   RenderPassId render_pass_id);

  int TransformTreeIndex() const;
  int ClipTreeIndex() const;
  int EffectTreeIndex() const;

 private:
  LayerImpl* owning_layer_;

  // Container for properties that render surfaces need to compute before they
  // can be drawn.
  struct DrawProperties {
    DrawProperties();
    ~DrawProperties();

    float draw_opacity;

    // Transforms from the surface's own space to the space of its target
    // surface.
    gfx::Transform draw_transform;
    // Transforms from the surface's own space to the viewport.
    gfx::Transform screen_space_transform;

    // If the surface has a replica, these transform from the replica's space to
    // the space of the target surface and the viewport.
    gfx::Transform replica_draw_transform;
    gfx::Transform replica_screen_space_transform;

    // This is in the surface's own space.
    gfx::Rect content_rect;

    // This is in the space of the surface's target surface.
    gfx::Rect clip_rect;

    // True if the surface needs to be clipped by clip_rect.
    bool is_clipped : 1;
  };

  DrawProperties draw_properties_;

  // Is used to calculate the content rect from property trees.
  gfx::Rect accumulated_content_rect_;
  bool surface_property_changed_ : 1;

  bool contributes_to_drawn_surface_ : 1;

  LayerImplList layer_list_;
  Occlusion occlusion_in_content_space_;

  // The nearest ancestor target surface that will contain the contents of this
  // surface, and that ignores outside occlusion. This can point to itself.
  RenderSurfaceImpl* nearest_occlusion_immune_ancestor_;

  scoped_ptr<DamageTracker> damage_tracker_;

  // For LayerIteratorActions
  int target_render_surface_layer_index_history_;
  size_t current_layer_index_history_;

  friend class LayerIterator;

  DISALLOW_COPY_AND_ASSIGN(RenderSurfaceImpl);
};

}  // namespace cc
#endif  // CC_LAYERS_RENDER_SURFACE_IMPL_H_