core/fpdfapi/page/cpdf_shadingobject.cpp

// Copyright 2016 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com

#include "core/fpdfapi/page/cpdf_shadingobject.h"

#include <utility>

#include "core/fpdfapi/page/cpdf_shadingpattern.h"

CPDF_ShadingObject::CPDF_ShadingObject(int32_t content_stream,
                                       RetainPtr<CPDF_ShadingPattern> pattern,
                                       const CFX_Matrix& matrix)
    : CPDF_PageObject(content_stream),
      shading_(std::move(pattern)),
      matrix_(matrix) {}

CPDF_ShadingObject::~CPDF_ShadingObject() = default;

CPDF_PageObject::Type CPDF_ShadingObject::GetType() const {
  return Type::kShading;
}

void CPDF_ShadingObject::Transform(const CFX_Matrix& matrix) {
  CPDF_ClipPath& clip_path = mutable_clip_path();
  if (clip_path.HasRef()) {
    clip_path.Transform(matrix);
  }

  matrix_.Concat(matrix);
  if (clip_path.HasRef()) {
    CalcBoundingBox();
  } else {
    SetRect(matrix.TransformRect(GetRect()));
  }
  SetDirty(true);
}

bool CPDF_ShadingObject::IsShading() const {
  return true;
}

CPDF_ShadingObject* CPDF_ShadingObject::AsShading() {
  return this;
}

const CPDF_ShadingObject* CPDF_ShadingObject::AsShading() const {
  return this;
}

void CPDF_ShadingObject::CalcBoundingBox() {
  if (!clip_path().HasRef()) {
    return;
  }
  SetRect(clip_path().GetClipBox());
}