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      1 // Copyright 2016 PDFium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
      6 
      7 #include "core/fpdfapi/page/cpdf_shadingobject.h"
      8 
      9 #include "core/fpdfapi/page/cpdf_docpagedata.h"
     10 #include "core/fpdfapi/page/cpdf_shadingpattern.h"
     11 #include "core/fpdfapi/parser/cpdf_document.h"
     12 
     13 CPDF_ShadingObject::CPDF_ShadingObject() : m_pShading(nullptr) {}
     14 
     15 CPDF_ShadingObject::~CPDF_ShadingObject() {}
     16 
     17 CPDF_PageObject::Type CPDF_ShadingObject::GetType() const {
     18   return SHADING;
     19 }
     20 
     21 void CPDF_ShadingObject::Transform(const CFX_Matrix& matrix) {
     22   if (m_ClipPath)
     23     m_ClipPath.Transform(matrix);
     24 
     25   m_Matrix.Concat(matrix);
     26   if (m_ClipPath) {
     27     CalcBoundingBox();
     28   } else {
     29     matrix.TransformRect(m_Left, m_Right, m_Top, m_Bottom);
     30   }
     31 }
     32 
     33 bool CPDF_ShadingObject::IsShading() const {
     34   return true;
     35 }
     36 
     37 CPDF_ShadingObject* CPDF_ShadingObject::AsShading() {
     38   return this;
     39 }
     40 
     41 const CPDF_ShadingObject* CPDF_ShadingObject::AsShading() const {
     42   return this;
     43 }
     44 
     45 void CPDF_ShadingObject::CalcBoundingBox() {
     46   if (!m_ClipPath)
     47     return;
     48   CFX_FloatRect rect = m_ClipPath.GetClipBox();
     49   m_Left = rect.left;
     50   m_Bottom = rect.bottom;
     51   m_Right = rect.right;
     52   m_Top = rect.top;
     53 }
     54