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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/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);
}
}
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