1 files changed, 62 insertions, 0 deletions
diff --git a/core/fpdfapi/page/cpdf_patterncs.cpp b/core/fpdfapi/page/cpdf_patterncs.cpp
new file mode 100644
index 0000000000..4951f61d54
--- /dev/null
+++ b/core/fpdfapi/page/cpdf_patterncs.cpp
@@ -0,0 +1,62 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// 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_patterncs.h"
+
+#include "core/fpdfapi/page/cpdf_docpagedata.h"
+#include "core/fpdfapi/parser/cpdf_array.h"
+#include "core/fpdfapi/parser/cpdf_document.h"
+
+CPDF_PatternCS::CPDF_PatternCS(CPDF_Document* pDoc)
+    : CPDF_ColorSpace(pDoc, PDFCS_PATTERN, 1),
+      m_pBaseCS(nullptr),
+      m_pCountedBaseCS(nullptr) {}
+
+CPDF_PatternCS::~CPDF_PatternCS() {
+  CPDF_ColorSpace* pCS = m_pCountedBaseCS ? m_pCountedBaseCS->get() : nullptr;
+  if (pCS && m_pDocument) {
+    auto* pPageData = m_pDocument->GetPageData();
+    if (pPageData)
+      pPageData->ReleaseColorSpace(pCS->GetArray());
+  }
+}
+
+bool CPDF_PatternCS::v_Load(CPDF_Document* pDoc, CPDF_Array* pArray) {
+  CPDF_Object* pBaseCS = pArray->GetDirectObjectAt(1);
+  if (pBaseCS == m_pArray)
+    return false;
+
+  CPDF_DocPageData* pDocPageData = pDoc->GetPageData();
+  m_pBaseCS = pDocPageData->GetColorSpace(pBaseCS, nullptr);
+  if (!m_pBaseCS) {
+    m_nComponents = 1;
+    return true;
+  }
+
+  if (m_pBaseCS->GetFamily() == PDFCS_PATTERN)
+    return false;
+
+  m_pCountedBaseCS = pDocPageData->FindColorSpacePtr(m_pBaseCS->GetArray());
+  m_nComponents = m_pBaseCS->CountComponents() + 1;
+  return m_pBaseCS->CountComponents() <= MAX_PATTERN_COLORCOMPS;
+}
+
+bool CPDF_PatternCS::GetRGB(float* pBuf, float* R, float* G, float* B) const {
+  if (m_pBaseCS) {
+    ASSERT(m_pBaseCS->GetFamily() != PDFCS_PATTERN);
+    PatternValue* pvalue = (PatternValue*)pBuf;
+    if (m_pBaseCS->GetRGB(pvalue->m_Comps, R, G, B))
+      return true;
+  }
+  *R = 0.75f;
+  *G = 0.75f;
+  *B = 0.75f;
+  return false;
+}
+
+CPDF_ColorSpace* CPDF_PatternCS::GetBaseCS() const {
+  return m_pBaseCS;
+}