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authordsinclair <dsinclair@chromium.org>2016-10-04 11:29:35 -0700
committerCommit bot <commit-bot@chromium.org>2016-10-04 11:29:36 -0700
commit41872fa5ac7448a50f66ad56d7bde8d1aa77db4b (patch)
tree49f8162a8ed05ace693d7164f9ba116286427919 /core/fpdfapi/page/cpdf_meshstream.cpp
parentbc5e6d289ed40efec2b0e03427e8fc2947bf53e3 (diff)
downloadpdfium-41872fa5ac7448a50f66ad56d7bde8d1aa77db4b.tar.xz
Move core/fpdfapi/fpdf_page to core/fpdfapi/page
BUG=pdfium:603 Review-Url: https://codereview.chromium.org/2386423004
Diffstat (limited to 'core/fpdfapi/page/cpdf_meshstream.cpp')
-rw-r--r--core/fpdfapi/page/cpdf_meshstream.cpp217
1 files changed, 217 insertions, 0 deletions
diff --git a/core/fpdfapi/page/cpdf_meshstream.cpp b/core/fpdfapi/page/cpdf_meshstream.cpp
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+++ b/core/fpdfapi/page/cpdf_meshstream.cpp
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+// Copyright 2016 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_meshstream.h"
+
+#include "core/fpdfapi/fpdf_parser/cpdf_array.h"
+#include "core/fpdfapi/page/cpdf_colorspace.h"
+#include "core/fpdfapi/page/pageint.h"
+
+namespace {
+
+// See PDF Reference 1.7, page 315, table 4.32. (Also table 4.33 and 4.34)
+bool ShouldCheckBPC(ShadingType type) {
+ switch (type) {
+ case kFreeFormGouraudTriangleMeshShading:
+ case kLatticeFormGouraudTriangleMeshShading:
+ case kCoonsPatchMeshShading:
+ case kTensorProductPatchMeshShading:
+ return true;
+ default:
+ return false;
+ }
+}
+
+// Same references as ShouldCheckBPC() above.
+bool IsValidBitsPerComponent(uint32_t x) {
+ switch (x) {
+ case 1:
+ case 2:
+ case 4:
+ case 8:
+ case 12:
+ case 16:
+ return true;
+ default:
+ return false;
+ }
+}
+
+// Same references as ShouldCheckBPC() above.
+bool IsValidBitsPerCoordinate(uint32_t x) {
+ switch (x) {
+ case 1:
+ case 2:
+ case 4:
+ case 8:
+ case 12:
+ case 16:
+ case 24:
+ case 32:
+ return true;
+ default:
+ return false;
+ }
+}
+
+// See PDF Reference 1.7, page 315, table 4.32. (Also table 4.34)
+bool ShouldCheckBitsPerFlag(ShadingType type) {
+ switch (type) {
+ case kFreeFormGouraudTriangleMeshShading:
+ case kCoonsPatchMeshShading:
+ case kTensorProductPatchMeshShading:
+ return true;
+ default:
+ return false;
+ }
+}
+
+// Same references as ShouldCheckBitsPerFlag() above.
+bool IsValidBitsPerFlag(uint32_t x) {
+ switch (x) {
+ case 2:
+ case 4:
+ case 8:
+ return true;
+ default:
+ return false;
+ }
+}
+
+} // namespace
+
+CPDF_MeshStream::CPDF_MeshStream(
+ ShadingType type,
+ const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
+ CPDF_Stream* pShadingStream,
+ CPDF_ColorSpace* pCS)
+ : m_type(type),
+ m_funcs(funcs),
+ m_pShadingStream(pShadingStream),
+ m_pCS(pCS),
+ m_nCoordBits(0),
+ m_nComponentBits(0),
+ m_nFlagBits(0),
+ m_nComponents(0),
+ m_CoordMax(0),
+ m_ComponentMax(0),
+ m_xmin(0),
+ m_xmax(0),
+ m_ymin(0),
+ m_ymax(0) {
+ memset(&m_ColorMin, 0, sizeof(m_ColorMin));
+ memset(&m_ColorMax, 0, sizeof(m_ColorMax));
+}
+
+bool CPDF_MeshStream::Load() {
+ m_Stream.LoadAllData(m_pShadingStream);
+ m_BitStream.Init(m_Stream.GetData(), m_Stream.GetSize());
+ CPDF_Dictionary* pDict = m_pShadingStream->GetDict();
+ m_nCoordBits = pDict->GetIntegerFor("BitsPerCoordinate");
+ m_nComponentBits = pDict->GetIntegerFor("BitsPerComponent");
+ if (ShouldCheckBPC(m_type)) {
+ if (!IsValidBitsPerCoordinate(m_nCoordBits))
+ return false;
+ if (!IsValidBitsPerComponent(m_nComponentBits))
+ return false;
+ }
+
+ m_nFlagBits = pDict->GetIntegerFor("BitsPerFlag");
+ if (ShouldCheckBitsPerFlag(m_type) && !IsValidBitsPerFlag(m_nFlagBits))
+ return false;
+
+ uint32_t nComponents = m_pCS->CountComponents();
+ if (nComponents > kMaxComponents)
+ return false;
+
+ m_nComponents = m_funcs.empty() ? nComponents : 1;
+ CPDF_Array* pDecode = pDict->GetArrayFor("Decode");
+ if (!pDecode || pDecode->GetCount() != 4 + m_nComponents * 2)
+ return false;
+
+ m_xmin = pDecode->GetNumberAt(0);
+ m_xmax = pDecode->GetNumberAt(1);
+ m_ymin = pDecode->GetNumberAt(2);
+ m_ymax = pDecode->GetNumberAt(3);
+ for (uint32_t i = 0; i < m_nComponents; ++i) {
+ m_ColorMin[i] = pDecode->GetNumberAt(i * 2 + 4);
+ m_ColorMax[i] = pDecode->GetNumberAt(i * 2 + 5);
+ }
+
+ if (ShouldCheckBPC(m_type)) {
+ m_CoordMax = m_nCoordBits == 32 ? -1 : (1 << m_nCoordBits) - 1;
+ m_ComponentMax = (1 << m_nComponentBits) - 1;
+ }
+ return true;
+}
+
+uint32_t CPDF_MeshStream::GetFlag() {
+ ASSERT(ShouldCheckBitsPerFlag(m_type));
+ return m_BitStream.GetBits(m_nFlagBits) & 0x03;
+}
+
+void CPDF_MeshStream::GetCoords(FX_FLOAT& x, FX_FLOAT& y) {
+ ASSERT(ShouldCheckBPC(m_type));
+ if (m_nCoordBits == 32) {
+ x = m_xmin + (FX_FLOAT)(m_BitStream.GetBits(m_nCoordBits) *
+ (m_xmax - m_xmin) / (double)m_CoordMax);
+ y = m_ymin + (FX_FLOAT)(m_BitStream.GetBits(m_nCoordBits) *
+ (m_ymax - m_ymin) / (double)m_CoordMax);
+ } else {
+ x = m_xmin +
+ m_BitStream.GetBits(m_nCoordBits) * (m_xmax - m_xmin) / m_CoordMax;
+ y = m_ymin +
+ m_BitStream.GetBits(m_nCoordBits) * (m_ymax - m_ymin) / m_CoordMax;
+ }
+}
+
+void CPDF_MeshStream::GetColor(FX_FLOAT& r, FX_FLOAT& g, FX_FLOAT& b) {
+ ASSERT(ShouldCheckBPC(m_type));
+ FX_FLOAT color_value[kMaxComponents];
+ for (uint32_t i = 0; i < m_nComponents; ++i) {
+ color_value[i] = m_ColorMin[i] +
+ m_BitStream.GetBits(m_nComponentBits) *
+ (m_ColorMax[i] - m_ColorMin[i]) / m_ComponentMax;
+ }
+ if (m_funcs.empty()) {
+ m_pCS->GetRGB(color_value, r, g, b);
+ return;
+ }
+
+ FX_FLOAT result[kMaxComponents];
+ FXSYS_memset(result, 0, sizeof(result));
+ int nResults;
+ for (const auto& func : m_funcs) {
+ if (func && func->CountOutputs() <= kMaxComponents)
+ func->Call(color_value, 1, result, nResults);
+ }
+ m_pCS->GetRGB(result, r, g, b);
+}
+
+uint32_t CPDF_MeshStream::GetVertex(CPDF_MeshVertex& vertex,
+ CFX_Matrix* pObject2Bitmap) {
+ uint32_t flag = GetFlag();
+ GetCoords(vertex.x, vertex.y);
+ pObject2Bitmap->Transform(vertex.x, vertex.y);
+ GetColor(vertex.r, vertex.g, vertex.b);
+ m_BitStream.ByteAlign();
+ return flag;
+}
+
+FX_BOOL CPDF_MeshStream::GetVertexRow(CPDF_MeshVertex* vertex,
+ int count,
+ CFX_Matrix* pObject2Bitmap) {
+ for (int i = 0; i < count; i++) {
+ if (m_BitStream.IsEOF())
+ return FALSE;
+
+ GetCoords(vertex[i].x, vertex[i].y);
+ pObject2Bitmap->Transform(vertex[i].x, vertex[i].y);
+ GetColor(vertex[i].r, vertex[i].g, vertex[i].b);
+ m_BitStream.ByteAlign();
+ }
+ return TRUE;
+}