dl_builder.h

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// Copyright 2013 The Flutter 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 FLUTTER_IMPELLER_TOOLKIT_INTEROP_DL_BUILDER_H_
#define FLUTTER_IMPELLER_TOOLKIT_INTEROP_DL_BUILDER_H_
 
#include "flutter/display_list/dl_builder.h"
#include "flutter/display_list/dl_canvas.h"
#include "impeller/geometry/scalar.h"
#include "impeller/geometry/size.h"
#include "impeller/toolkit/interop/dl.h"
#include "impeller/toolkit/interop/formats.h"
#include "impeller/toolkit/interop/image_filter.h"
#include "impeller/toolkit/interop/impeller.h"
#include "impeller/toolkit/interop/object.h"
#include "impeller/toolkit/interop/paint.h"
#include "impeller/toolkit/interop/paragraph.h"
#include "impeller/toolkit/interop/path.h"
#include "impeller/toolkit/interop/texture.h"
 
namespace impeller::interop {
 
class DisplayListBuilder final
    : public Object<DisplayListBuilder,
                    IMPELLER_INTERNAL_HANDLE_NAME(ImpellerDisplayListBuilder)> {
 public:
  explicit DisplayListBuilder(const ImpellerRect* rect);
 
  ~DisplayListBuilder() override;
 
  DisplayListBuilder(const DisplayListBuilder&) = delete;
 
  DisplayListBuilder& operator=(const DisplayListBuilder&) = delete;
 
  void Save();
 
  void SaveLayer(const Rect& bounds,
                 const Paint* paint,
                 const ImageFilter* backdrop);
 
  void Restore();
 
  void Scale(Size scale);
 
  void Rotate(Degrees angle);
 
  void Translate(Point translation);
 
  Matrix GetTransform() const;
 
  void SetTransform(const Matrix& matrix);
 
  void ResetTransform();
 
  uint32_t GetSaveCount() const;
 
  void RestoreToCount(uint32_t count);
 
  void ClipRect(const Rect& rect, flutter::DlCanvas::ClipOp op);
 
  void ClipOval(const Rect& rect, flutter::DlCanvas::ClipOp op);
 
  void ClipRoundedRect(const Rect& rect,
                       const impeller::PathBuilder::RoundingRadii& radii,
                       flutter::DlCanvas::ClipOp op);
 
  void ClipPath(const Path& path, flutter::DlCanvas::ClipOp op);
 
  void DrawPaint(const Paint& paint);
 
  void DrawLine(const Point& from, const Point& to, const Paint& paint);
 
  void DrawDashedLine(const Point& from,
                      const Point& to,
                      Scalar on_length,
                      Scalar off_length,
                      const Paint& paint);
 
  void DrawRect(const Rect& rect, const Paint& paint);
 
  void DrawOval(const Rect& oval_bounds, const Paint& paint);
 
  void DrawRoundedRect(const Rect& rect,
                       const impeller::PathBuilder::RoundingRadii& radii,
                       const Paint& paint);
 
  void DrawRoundedRectDifference(
      const Rect& outer_rect,
      const impeller::PathBuilder::RoundingRadii& outer_radii,
      const Rect& inner_rect,
      const impeller::PathBuilder::RoundingRadii& inner_radii,
      const Paint& paint);
 
  void DrawPath(const Path& path, const Paint& paint);
 
  void DrawTexture(const Texture& texture,
                   const Point& point,
                   flutter::DlImageSampling sampling,
                   const Paint* paint);
 
  void DrawTextureRect(const Texture& texture,
                       const Rect& src_rect,
                       const Rect& dst_rect,
                       flutter::DlImageSampling sampling,
                       const Paint* paint);
 
  void DrawDisplayList(const DisplayList& dl, Scalar opacity);
 
  void DrawParagraph(const Paragraph& paragraph, Point point);
 
  ScopedObject<DisplayList> Build();
 
 private:
  flutter::DisplayListBuilder builder_;
};
 
}  // namespace impeller::interop
 
#endif  // FLUTTER_IMPELLER_TOOLKIT_INTEROP_DL_BUILDER_H_