CPDF_Document::LoadPattern() and friends always have a valid matrix.

core/fpdfapi/fpdf_page/fpdf_page_pattern.cpp

Index: core/fpdfapi/fpdf_page/fpdf_page_pattern.cpp
diff --git a/core/fpdfapi/fpdf_page/fpdf_page_pattern.cpp b/core/fpdfapi/fpdf_page/fpdf_page_pattern.cpp
deleted file mode 100644
index 68ac8c849d71e522b1feab720858703b2bf34292..0000000000000000000000000000000000000000
--- a/core/fpdfapi/fpdf_page/fpdf_page_pattern.cpp
+++ /dev/null
@@ -1,87 +0,0 @@
-// 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/fpdf_page/pageint.h"
-
-#include <algorithm>
-
-#include "core/fpdfapi/fpdf_page/cpdf_meshstream.h"
-#include "core/fpdfapi/fpdf_page/cpdf_shadingpattern.h"
-#include "core/fpdfapi/fpdf_page/include/cpdf_form.h"
-#include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
-#include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h"
-#include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
-#include "core/fpdfapi/fpdf_parser/include/cpdf_stream.h"
-
-namespace {
-
-const int kSingleCoordinatePair = 1;
-const int kTensorCoordinatePairs = 16;
-const int kCoonsCoordinatePairs = 12;
-
-const int kSingleColorPerPatch = 1;
-const int kQuadColorsPerPatch = 4;
-
-}  // namespace
-
-
-
-CFX_FloatRect GetShadingBBox(CPDF_Stream* pStream,
-                             ShadingType type,
-                             const CFX_Matrix* pMatrix,
-                             CPDF_Function** pFuncs,
-                             int nFuncs,
-                             CPDF_ColorSpace* pCS) {
-  if (!pStream || !pStream->IsStream() || !pFuncs || !pCS)
-    return CFX_FloatRect(0, 0, 0, 0);
-
-  CPDF_MeshStream stream;
-  if (!stream.Load(pStream, pFuncs, nFuncs, pCS))
-    return CFX_FloatRect(0, 0, 0, 0);
-
-  CFX_FloatRect rect;
-  bool bStarted = false;
-  bool bGouraud = type == kFreeFormGouraudTriangleMeshShading ||
-                  type == kLatticeFormGouraudTriangleMeshShading;
-
-  int point_count = kSingleCoordinatePair;
-  if (type == kTensorProductPatchMeshShading)
-    point_count = kTensorCoordinatePairs;
-  else if (type == kCoonsPatchMeshShading)
-    point_count = kCoonsCoordinatePairs;
-
-  int color_count = kSingleColorPerPatch;
-  if (type == kCoonsPatchMeshShading || type == kTensorProductPatchMeshShading)
-    color_count = kQuadColorsPerPatch;
-
-  while (!stream.m_BitStream.IsEOF()) {
-    uint32_t flag = 0;
-    if (type != kLatticeFormGouraudTriangleMeshShading)
-      flag = stream.GetFlag();
-
-    if (!bGouraud && flag) {
-      point_count -= 4;
-      color_count -= 2;
-    }
-
-    for (int i = 0; i < point_count; i++) {
-      FX_FLOAT x, y;
-      stream.GetCoords(x, y);
-      if (bStarted) {
-        rect.UpdateRect(x, y);
-      } else {
-        rect.InitRect(x, y);
-        bStarted = TRUE;
-      }
-    }
-    stream.m_BitStream.SkipBits(stream.m_nComps * stream.m_nCompBits *
-                                color_count);
-    if (bGouraud)
-      stream.m_BitStream.ByteAlign();
-  }
-  rect.Transform(pMatrix);
-  return rect;
-}