| // 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/fpdf_page/include/cpdf_clippath.h" |
| |
| #include "core/fpdfapi/fpdf_page/include/cpdf_textobject.h" |
| |
| #define FPDF_CLIPPATH_MAX_TEXTS 1024 |
| |
| CFX_FloatRect CPDF_ClipPath::GetClipBox() const { |
| CFX_FloatRect rect; |
| FX_BOOL bStarted = FALSE; |
| int count = GetPathCount(); |
| if (count) { |
| rect = GetPath(0).GetBoundingBox(); |
| for (int i = 1; i < count; i++) { |
| CFX_FloatRect path_rect = GetPath(i).GetBoundingBox(); |
| rect.Intersect(path_rect); |
| } |
| bStarted = TRUE; |
| } |
| count = GetTextCount(); |
| if (count) { |
| CFX_FloatRect layer_rect; |
| FX_BOOL bLayerStarted = FALSE; |
| for (int i = 0; i < count; i++) { |
| CPDF_TextObject* pTextObj = GetText(i); |
| if (!pTextObj) { |
| if (!bStarted) { |
| rect = layer_rect; |
| bStarted = TRUE; |
| } else { |
| rect.Intersect(layer_rect); |
| } |
| bLayerStarted = FALSE; |
| } else { |
| if (!bLayerStarted) { |
| layer_rect = CFX_FloatRect(pTextObj->GetBBox(nullptr)); |
| bLayerStarted = TRUE; |
| } else { |
| layer_rect.Union(CFX_FloatRect(pTextObj->GetBBox(nullptr))); |
| } |
| } |
| } |
| } |
| return rect; |
| } |
| |
| void CPDF_ClipPath::AppendPath(CPDF_Path path, int type, FX_BOOL bAutoMerge) { |
| CPDF_ClipPathData* pData = GetModify(); |
| if (pData->m_PathCount && bAutoMerge) { |
| CPDF_Path old_path = pData->m_pPathList[pData->m_PathCount - 1]; |
| if (old_path.IsRect()) { |
| CFX_FloatRect old_rect(old_path.GetPointX(0), old_path.GetPointY(0), |
| old_path.GetPointX(2), old_path.GetPointY(2)); |
| CFX_FloatRect new_rect = path.GetBoundingBox(); |
| if (old_rect.Contains(new_rect)) { |
| pData->m_PathCount--; |
| pData->m_pPathList[pData->m_PathCount].SetNull(); |
| } |
| } |
| } |
| if (pData->m_PathCount % 8 == 0) { |
| CPDF_Path* pNewPath = new CPDF_Path[pData->m_PathCount + 8]; |
| for (int i = 0; i < pData->m_PathCount; i++) { |
| pNewPath[i] = pData->m_pPathList[i]; |
| } |
| delete[] pData->m_pPathList; |
| uint8_t* pNewType = FX_Alloc(uint8_t, pData->m_PathCount + 8); |
| FXSYS_memcpy(pNewType, pData->m_pTypeList, pData->m_PathCount); |
| FX_Free(pData->m_pTypeList); |
| pData->m_pPathList = pNewPath; |
| pData->m_pTypeList = pNewType; |
| } |
| pData->m_pPathList[pData->m_PathCount] = path; |
| pData->m_pTypeList[pData->m_PathCount] = (uint8_t)type; |
| pData->m_PathCount++; |
| } |
| |
| void CPDF_ClipPath::DeletePath(int index) { |
| CPDF_ClipPathData* pData = GetModify(); |
| if (index >= pData->m_PathCount) { |
| return; |
| } |
| pData->m_pPathList[index].SetNull(); |
| for (int i = index; i < pData->m_PathCount - 1; i++) { |
| pData->m_pPathList[i] = pData->m_pPathList[i + 1]; |
| } |
| pData->m_pPathList[pData->m_PathCount - 1].SetNull(); |
| FXSYS_memmove(pData->m_pTypeList + index, pData->m_pTypeList + index + 1, |
| pData->m_PathCount - index - 1); |
| pData->m_PathCount--; |
| } |
| |
| void CPDF_ClipPath::AppendTexts(CPDF_TextObject** pTexts, int count) { |
| CPDF_ClipPathData* pData = GetModify(); |
| if (pData->m_TextCount + count > FPDF_CLIPPATH_MAX_TEXTS) { |
| for (int i = 0; i < count; i++) { |
| delete pTexts[i]; |
| } |
| return; |
| } |
| CPDF_TextObject** pNewList = |
| FX_Alloc(CPDF_TextObject*, pData->m_TextCount + count + 1); |
| if (pData->m_pTextList) { |
| FXSYS_memcpy(pNewList, pData->m_pTextList, |
| pData->m_TextCount * sizeof(CPDF_TextObject*)); |
| FX_Free(pData->m_pTextList); |
| } |
| pData->m_pTextList = pNewList; |
| for (int i = 0; i < count; i++) { |
| pData->m_pTextList[pData->m_TextCount + i] = pTexts[i]; |
| } |
| pData->m_pTextList[pData->m_TextCount + count] = NULL; |
| pData->m_TextCount += count + 1; |
| } |
| |
| void CPDF_ClipPath::Transform(const CFX_Matrix& matrix) { |
| CPDF_ClipPathData* pData = GetModify(); |
| int i; |
| for (i = 0; i < pData->m_PathCount; i++) { |
| pData->m_pPathList[i].Transform(&matrix); |
| } |
| for (i = 0; i < pData->m_TextCount; i++) |
| if (pData->m_pTextList[i]) { |
| pData->m_pTextList[i]->Transform(matrix); |
| } |
| } |