Add DCLayerOverlayProcessor and supporting DCLayer structures.

ui/gl/dc_renderer_layer_params.h

+// Copyright 2017 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 UI_GL_DC_RENDERER_LAYER_PARAMS_H_
+#define UI_GL_DC_RENDERER_LAYER_PARAMS_H_
+
+#include <vector>
+
+#include "third_party/skia/include/core/SkColor.h"
+#include "ui/gfx/geometry/point.h"
+#include "ui/gfx/geometry/rect.h"
+#include "ui/gfx/geometry/rect_f.h"
+#include "ui/gfx/transform.h"
+#include "ui/gl/gl_export.h"
+
+namespace gl {
+class GLImage;
+}
+
+namespace ui {
+
+struct GL_EXPORT DCRendererLayerParams {
+  DCRendererLayerParams(bool is_clipped,
+                        const gfx::Rect clip_rect,
+                        unsigned sorting_context_id,
+                        const gfx::Transform& transform,
+                        gl::GLImage* image,
+                        const gfx::RectF& contents_rect,
+                        const gfx::Rect& rect,
+                        unsigned background_color,
+                        unsigned edge_aa_mask,
+                        float opacity,
+                        unsigned filter);
+  DCRendererLayerParams(const DCRendererLayerParams& other);
+  ~DCRendererLayerParams();
+
+  bool is_clipped;
+  const gfx::Rect clip_rect;
+  unsigned sorting_context_id;
+  const gfx::Transform transform;
+  gl::GLImage* image;
+  const gfx::RectF contents_rect;
+  const gfx::Rect rect;
+  unsigned background_color;
+  unsigned edge_aa_mask;
+  float opacity;
+  unsigned filter;
+
+  // This is a subset of cc::FilterOperation::FilterType.
+  enum class FilterEffectType : uint32_t {
+    GRAYSDCLE,
+    SEPIA,
+    SATURATE,
+    HUE_ROTATE,
+    INVERT,
+    BRIGHTNESS,
+    CONTRAST,
+    OPACITY,
+    BLUR,
+    DROP_SHADOW,
+  };
+  struct GL_EXPORT FilterEffect {
+    FilterEffectType type = FilterEffectType::GRAYSDCLE;
+
+    // For every filter other than DROP_SHADOW, only |amount| is populated.
+    float amount = 0;
+    gfx::Point drop_shadow_offset;
+    SkColor drop_shadow_color = 0;
+  };
+  using FilterEffects = std::vector<FilterEffect>;
+
+  FilterEffects filter_effects;
+};
+
+}  // namespace ui
+
+#endif  // UI_GL_DC_RENDERER_LAYER_PARAMS_H_