| // 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 "../../../include/fpdfapi/fpdf_page.h" |
| #include "pageint.h" |
| |
| CPDF_Pattern::CPDF_Pattern(const CFX_AffineMatrix* pParentMatrix) : |
| m_pPatternObj(NULL), m_PatternType(PATTERN_TILING), m_pDocument(NULL), m_bForceClear(FALSE) |
| { |
| if (pParentMatrix) { |
| m_ParentMatrix = *pParentMatrix; |
| } |
| } |
| CPDF_Pattern::~CPDF_Pattern() |
| { |
| } |
| CPDF_TilingPattern::CPDF_TilingPattern(CPDF_Document* pDoc, CPDF_Object* pPatternObj, const CFX_AffineMatrix* parentMatrix) : |
| CPDF_Pattern(parentMatrix) |
| { |
| m_PatternType = PATTERN_TILING; |
| m_pPatternObj = pPatternObj; |
| m_pDocument = pDoc; |
| CPDF_Dictionary* pDict = m_pPatternObj->GetDict(); |
| ASSERT(pDict != NULL); |
| m_Pattern2Form = pDict->GetMatrix(FX_BSTRC("Matrix")); |
| m_bColored = pDict->GetInteger(FX_BSTRC("PaintType")) == 1; |
| if (parentMatrix) { |
| m_Pattern2Form.Concat(*parentMatrix); |
| } |
| m_pForm = NULL; |
| } |
| CPDF_TilingPattern::~CPDF_TilingPattern() |
| { |
| if (m_pForm) { |
| delete m_pForm; |
| m_pForm = NULL; |
| } |
| } |
| FX_BOOL CPDF_TilingPattern::Load() |
| { |
| if (m_pForm != NULL) { |
| return TRUE; |
| } |
| CPDF_Dictionary* pDict = m_pPatternObj->GetDict(); |
| if (pDict == NULL) { |
| return FALSE; |
| } |
| m_bColored = pDict->GetInteger(FX_BSTRC("PaintType")) == 1; |
| m_XStep = (FX_FLOAT)FXSYS_fabs(pDict->GetNumber(FX_BSTRC("XStep"))); |
| m_YStep = (FX_FLOAT)FXSYS_fabs(pDict->GetNumber(FX_BSTRC("YStep"))); |
| if (m_pPatternObj->GetType() != PDFOBJ_STREAM) { |
| return FALSE; |
| } |
| CPDF_Stream* pStream = (CPDF_Stream*)m_pPatternObj; |
| m_pForm = new CPDF_Form(m_pDocument, NULL, pStream); |
| m_pForm->ParseContent(NULL, &m_ParentMatrix, NULL, NULL); |
| m_BBox = pDict->GetRect(FX_BSTRC("BBox")); |
| return TRUE; |
| } |
| CPDF_ShadingPattern::CPDF_ShadingPattern(CPDF_Document* pDoc, CPDF_Object* pPatternObj, FX_BOOL bShading, const CFX_AffineMatrix* parentMatrix) : CPDF_Pattern(parentMatrix) |
| { |
| m_PatternType = PATTERN_SHADING; |
| m_pPatternObj = bShading ? NULL : pPatternObj; |
| m_pDocument = pDoc; |
| m_bShadingObj = bShading; |
| if (!bShading) { |
| CPDF_Dictionary* pDict = m_pPatternObj->GetDict(); |
| ASSERT(pDict != NULL); |
| m_Pattern2Form = pDict->GetMatrix(FX_BSTRC("Matrix")); |
| m_pShadingObj = pDict->GetElementValue(FX_BSTRC("Shading")); |
| if (parentMatrix) { |
| m_Pattern2Form.Concat(*parentMatrix); |
| } |
| } else { |
| m_pShadingObj = pPatternObj; |
| } |
| m_ShadingType = 0; |
| m_pCS = NULL; |
| m_nFuncs = 0; |
| for (int i = 0; i < 4; i ++) { |
| m_pFunctions[i] = NULL; |
| } |
| m_pCountedCS = NULL; |
| } |
| CPDF_ShadingPattern::~CPDF_ShadingPattern() |
| { |
| Clear(); |
| } |
| void CPDF_ShadingPattern::Clear() |
| { |
| for (int i = 0; i < m_nFuncs; i ++) { |
| if (m_pFunctions[i]) { |
| delete m_pFunctions[i]; |
| } |
| m_pFunctions[i] = NULL; |
| } |
| CPDF_ColorSpace* pCS = m_pCountedCS ? m_pCountedCS->m_Obj : NULL; |
| if (pCS && m_pDocument) { |
| m_pDocument->GetPageData()->ReleaseColorSpace(pCS->GetArray()); |
| } |
| m_ShadingType = 0; |
| m_pCS = NULL; |
| m_pCountedCS = NULL; |
| m_nFuncs = 0; |
| } |
| FX_BOOL CPDF_ShadingPattern::Load() |
| { |
| if (m_ShadingType != 0) { |
| return TRUE; |
| } |
| CPDF_Dictionary* pShadingDict = m_pShadingObj ? m_pShadingObj->GetDict() : NULL; |
| if (pShadingDict == NULL) { |
| return FALSE; |
| } |
| if (m_nFuncs) { |
| for (int i = 0; i < m_nFuncs; i ++) |
| if (m_pFunctions[i]) { |
| delete m_pFunctions[i]; |
| } |
| m_nFuncs = 0; |
| } |
| CPDF_Object* pFunc = pShadingDict->GetElementValue(FX_BSTRC("Function")); |
| if (pFunc) { |
| if (pFunc->GetType() == PDFOBJ_ARRAY) { |
| m_nFuncs = ((CPDF_Array*)pFunc)->GetCount(); |
| if (m_nFuncs > 4) { |
| m_nFuncs = 4; |
| } |
| for (int i = 0; i < m_nFuncs; i ++) { |
| m_pFunctions[i] = CPDF_Function::Load(((CPDF_Array*)pFunc)->GetElementValue(i)); |
| } |
| } else { |
| m_pFunctions[0] = CPDF_Function::Load(pFunc); |
| m_nFuncs = 1; |
| } |
| } |
| CPDF_Object* pCSObj = pShadingDict->GetElementValue(FX_BSTRC("ColorSpace")); |
| if (pCSObj == NULL) { |
| return FALSE; |
| } |
| CPDF_DocPageData* pDocPageData = m_pDocument->GetPageData(); |
| m_pCS = pDocPageData->GetColorSpace(pCSObj, NULL); |
| if (m_pCS) { |
| m_pCountedCS = pDocPageData->FindColorSpacePtr(m_pCS->GetArray()); |
| } |
| m_ShadingType = pShadingDict->GetInteger(FX_BSTRC("ShadingType")); |
| return TRUE; |
| } |
| FX_BOOL CPDF_ShadingPattern::Reload() |
| { |
| Clear(); |
| return Load(); |
| } |
| FX_BOOL CPDF_MeshStream::Load(CPDF_Stream* pShadingStream, CPDF_Function** pFuncs, int nFuncs, CPDF_ColorSpace* pCS) |
| { |
| m_Stream.LoadAllData(pShadingStream); |
| m_BitStream.Init(m_Stream.GetData(), m_Stream.GetSize()); |
| m_pFuncs = pFuncs; |
| m_nFuncs = nFuncs; |
| m_pCS = pCS; |
| CPDF_Dictionary* pDict = pShadingStream->GetDict(); |
| m_nCoordBits = pDict->GetInteger(FX_BSTRC("BitsPerCoordinate")); |
| m_nCompBits = pDict->GetInteger(FX_BSTRC("BitsPerComponent")); |
| m_nFlagBits = pDict->GetInteger(FX_BSTRC("BitsPerFlag")); |
| if (!m_nCoordBits || !m_nCompBits) { |
| return FALSE; |
| } |
| int nComps = pCS->CountComponents(); |
| if (nComps > 8) { |
| return FALSE; |
| } |
| m_nComps = nFuncs ? 1 : nComps; |
| if (((int)m_nComps < 0) || m_nComps > 8) { |
| return FALSE; |
| } |
| m_CoordMax = m_nCoordBits == 32 ? -1 : (1 << m_nCoordBits) - 1; |
| m_CompMax = (1 << m_nCompBits) - 1; |
| CPDF_Array* pDecode = pDict->GetArray(FX_BSTRC("Decode")); |
| if (pDecode == NULL || pDecode->GetCount() != 4 + m_nComps * 2) { |
| return FALSE; |
| } |
| m_xmin = pDecode->GetNumber(0); |
| m_xmax = pDecode->GetNumber(1); |
| m_ymin = pDecode->GetNumber(2); |
| m_ymax = pDecode->GetNumber(3); |
| for (FX_DWORD i = 0; i < m_nComps; i ++) { |
| m_ColorMin[i] = pDecode->GetNumber(i * 2 + 4); |
| m_ColorMax[i] = pDecode->GetNumber(i * 2 + 5); |
| } |
| return TRUE; |
| } |
| FX_DWORD CPDF_MeshStream::GetFlag() |
| { |
| return m_BitStream.GetBits(m_nFlagBits) & 0x03; |
| } |
| void CPDF_MeshStream::GetCoords(FX_FLOAT& x, FX_FLOAT& y) |
| { |
| 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) |
| { |
| FX_DWORD i; |
| FX_FLOAT color_value[8]; |
| for (i = 0; i < m_nComps; i ++) { |
| color_value[i] = m_ColorMin[i] + m_BitStream.GetBits(m_nCompBits) * (m_ColorMax[i] - m_ColorMin[i]) / m_CompMax; |
| } |
| if (m_nFuncs) { |
| static const int kMaxResults = 8; |
| FX_FLOAT result[kMaxResults]; |
| int nResults; |
| FXSYS_memset32(result, 0, sizeof(result)); |
| for (FX_DWORD i = 0; i < m_nFuncs; i ++) { |
| if (m_pFuncs[i] && m_pFuncs[i]->CountOutputs() <= kMaxResults) { |
| m_pFuncs[i]->Call(color_value, 1, result, nResults); |
| } |
| } |
| m_pCS->GetRGB(result, r, g, b); |
| } else { |
| m_pCS->GetRGB(color_value, r, g, b); |
| } |
| } |
| FX_DWORD CPDF_MeshStream::GetVertex(CPDF_MeshVertex& vertex, CFX_AffineMatrix* pObject2Bitmap) |
| { |
| FX_DWORD 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_AffineMatrix* 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; |
| } |
| CFX_FloatRect _GetShadingBBox(CPDF_Stream* pStream, int type, const CFX_AffineMatrix* pMatrix, |
| CPDF_Function** pFuncs, int nFuncs, CPDF_ColorSpace* pCS) |
| { |
| if (pStream == NULL || pStream->GetType() != PDFOBJ_STREAM || pFuncs == NULL || pCS == NULL) { |
| 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; |
| FX_BOOL bStarted = FALSE; |
| FX_BOOL bGouraud = type == 4 || type == 5; |
| int full_point_count = type == 7 ? 16 : (type == 6 ? 12 : 1); |
| int full_color_count = (type == 6 || type == 7) ? 4 : 1; |
| while (!stream.m_BitStream.IsEOF()) { |
| FX_DWORD flag = 0; |
| if (type != 5) { |
| flag = stream.GetFlag(); |
| } |
| int point_count = full_point_count, color_count = full_color_count; |
| 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; |
| } |
