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Unified Diff: fpdfsdk/src/fpdf_flatten.cpp

Issue 1799773002: Move fpdfsdk/src up to fpdfsdk/. (Closed) Base URL: https://pdfium.googlesource.com/pdfium.git@master
Patch Set: Rebase to master Created 4 years, 9 months ago
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Index: fpdfsdk/src/fpdf_flatten.cpp
diff --git a/fpdfsdk/src/fpdf_flatten.cpp b/fpdfsdk/src/fpdf_flatten.cpp
deleted file mode 100644
index cca63d6b763155a1180b585889894d491b7a7189..0000000000000000000000000000000000000000
--- a/fpdfsdk/src/fpdf_flatten.cpp
+++ /dev/null
@@ -1,518 +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 "public/fpdf_flatten.h"
-
-#include <algorithm>
-
-#include "core/include/fpdfapi/cpdf_array.h"
-#include "core/include/fpdfapi/cpdf_document.h"
-#include "core/include/fpdfapi/cpdf_number.h"
-#include "fpdfsdk/include/fsdk_define.h"
-
-typedef CFX_ArrayTemplate<CPDF_Dictionary*> CPDF_ObjectArray;
-typedef CFX_ArrayTemplate<CFX_FloatRect> CPDF_RectArray;
-
-enum FPDF_TYPE { MAX, MIN };
-enum FPDF_VALUE { TOP, LEFT, RIGHT, BOTTOM };
-
-FX_BOOL IsValiableRect(CFX_FloatRect rect, CFX_FloatRect rcPage) {
- if (rect.left - rect.right > 0.000001f || rect.bottom - rect.top > 0.000001f)
- return FALSE;
-
- if (rect.left == 0.0f && rect.top == 0.0f && rect.right == 0.0f &&
- rect.bottom == 0.0f)
- return FALSE;
-
- if (!rcPage.IsEmpty()) {
- if (rect.left - rcPage.left < -10.000001f ||
- rect.right - rcPage.right > 10.000001f ||
- rect.top - rcPage.top > 10.000001f ||
- rect.bottom - rcPage.bottom < -10.000001f)
- return FALSE;
- }
-
- return TRUE;
-}
-
-void GetContentsRect(CPDF_Document* pDoc,
- CPDF_Dictionary* pDict,
- CPDF_RectArray* pRectArray) {
- std::unique_ptr<CPDF_Page> pPDFPage(new CPDF_Page);
- pPDFPage->Load(pDoc, pDict, FALSE);
- pPDFPage->ParseContent(nullptr);
-
- for (auto& pPageObject : *pPDFPage->GetPageObjectList()) {
- if (!pPageObject)
- continue;
-
- CFX_FloatRect rc;
- rc.left = pPageObject->m_Left;
- rc.right = pPageObject->m_Right;
- rc.bottom = pPageObject->m_Bottom;
- rc.top = pPageObject->m_Top;
- if (IsValiableRect(rc, pDict->GetRectBy("MediaBox")))
- pRectArray->Add(rc);
- }
-}
-
-void ParserStream(CPDF_Dictionary* pPageDic,
- CPDF_Dictionary* pStream,
- CPDF_RectArray* pRectArray,
- CPDF_ObjectArray* pObjectArray) {
- if (!pStream)
- return;
- CFX_FloatRect rect;
- if (pStream->KeyExist("Rect"))
- rect = pStream->GetRectBy("Rect");
- else if (pStream->KeyExist("BBox"))
- rect = pStream->GetRectBy("BBox");
-
- if (IsValiableRect(rect, pPageDic->GetRectBy("MediaBox")))
- pRectArray->Add(rect);
-
- pObjectArray->Add(pStream);
-}
-
-int ParserAnnots(CPDF_Document* pSourceDoc,
- CPDF_Dictionary* pPageDic,
- CPDF_RectArray* pRectArray,
- CPDF_ObjectArray* pObjectArray,
- int nUsage) {
- if (!pSourceDoc || !pPageDic)
- return FLATTEN_FAIL;
-
- GetContentsRect(pSourceDoc, pPageDic, pRectArray);
- CPDF_Array* pAnnots = pPageDic->GetArrayBy("Annots");
- if (!pAnnots)
- return FLATTEN_NOTHINGTODO;
-
- FX_DWORD dwSize = pAnnots->GetCount();
- for (int i = 0; i < (int)dwSize; i++) {
- CPDF_Dictionary* pAnnotDic = ToDictionary(pAnnots->GetElementValue(i));
- if (!pAnnotDic)
- continue;
-
- CFX_ByteString sSubtype = pAnnotDic->GetStringBy("Subtype");
- if (sSubtype == "Popup")
- continue;
-
- int nAnnotFlag = pAnnotDic->GetIntegerBy("F");
- if (nAnnotFlag & ANNOTFLAG_HIDDEN)
- continue;
-
- if (nUsage == FLAT_NORMALDISPLAY) {
- if (nAnnotFlag & ANNOTFLAG_INVISIBLE)
- continue;
-
- ParserStream(pPageDic, pAnnotDic, pRectArray, pObjectArray);
- } else {
- if (nAnnotFlag & ANNOTFLAG_PRINT)
- ParserStream(pPageDic, pAnnotDic, pRectArray, pObjectArray);
- }
- }
- return FLATTEN_SUCCESS;
-}
-
-FX_FLOAT GetMinMaxValue(CPDF_RectArray& array,
- FPDF_TYPE type,
- FPDF_VALUE value) {
- int nRects = array.GetSize();
- FX_FLOAT fRet = 0.0f;
-
- if (nRects <= 0)
- return 0.0f;
-
- FX_FLOAT* pArray = new FX_FLOAT[nRects];
- switch (value) {
- case LEFT: {
- for (int i = 0; i < nRects; i++)
- pArray[i] = CFX_FloatRect(array.GetAt(i)).left;
-
- break;
- }
- case TOP: {
- for (int i = 0; i < nRects; i++)
- pArray[i] = CFX_FloatRect(array.GetAt(i)).top;
-
- break;
- }
- case RIGHT: {
- for (int i = 0; i < nRects; i++)
- pArray[i] = CFX_FloatRect(array.GetAt(i)).right;
-
- break;
- }
- case BOTTOM: {
- for (int i = 0; i < nRects; i++)
- pArray[i] = CFX_FloatRect(array.GetAt(i)).bottom;
-
- break;
- }
- default:
- break;
- }
- fRet = pArray[0];
- if (type == MAX) {
- for (int i = 1; i < nRects; i++)
- if (fRet <= pArray[i])
- fRet = pArray[i];
- } else {
- for (int i = 1; i < nRects; i++)
- if (fRet >= pArray[i])
- fRet = pArray[i];
- }
- delete[] pArray;
- return fRet;
-}
-
-CFX_FloatRect CalculateRect(CPDF_RectArray* pRectArray) {
- CFX_FloatRect rcRet;
-
- rcRet.left = GetMinMaxValue(*pRectArray, MIN, LEFT);
- rcRet.top = GetMinMaxValue(*pRectArray, MAX, TOP);
- rcRet.right = GetMinMaxValue(*pRectArray, MAX, RIGHT);
- rcRet.bottom = GetMinMaxValue(*pRectArray, MIN, BOTTOM);
-
- return rcRet;
-}
-
-void SetPageContents(CFX_ByteString key,
- CPDF_Dictionary* pPage,
- CPDF_Document* pDocument) {
- CPDF_Object* pContentsObj = pPage->GetStreamBy("Contents");
- if (!pContentsObj) {
- pContentsObj = pPage->GetArrayBy("Contents");
- }
-
- if (!pContentsObj) {
- // Create a new contents dictionary
- if (!key.IsEmpty()) {
- CPDF_Stream* pNewContents = new CPDF_Stream(NULL, 0, new CPDF_Dictionary);
- pPage->SetAtReference("Contents", pDocument,
- pDocument->AddIndirectObject(pNewContents));
-
- CFX_ByteString sStream;
- sStream.Format("q 1 0 0 1 0 0 cm /%s Do Q", key.c_str());
- pNewContents->SetData((const uint8_t*)sStream, sStream.GetLength(), FALSE,
- FALSE);
- }
- return;
- }
-
- CPDF_Array* pContentsArray = NULL;
-
- switch (pContentsObj->GetType()) {
- case CPDF_Object::STREAM: {
- pContentsArray = new CPDF_Array;
- CPDF_Stream* pContents = pContentsObj->AsStream();
- FX_DWORD dwObjNum = pDocument->AddIndirectObject(pContents);
- CPDF_StreamAcc acc;
- acc.LoadAllData(pContents);
- CFX_ByteString sStream = "q\n";
- CFX_ByteString sBody =
- CFX_ByteString((const FX_CHAR*)acc.GetData(), acc.GetSize());
- sStream = sStream + sBody + "\nQ";
- pContents->SetData((const uint8_t*)sStream, sStream.GetLength(), FALSE,
- FALSE);
- pContentsArray->AddReference(pDocument, dwObjNum);
- break;
- }
-
- case CPDF_Object::ARRAY: {
- pContentsArray = pContentsObj->AsArray();
- break;
- }
- default:
- break;
- }
-
- if (!pContentsArray)
- return;
-
- FX_DWORD dwObjNum = pDocument->AddIndirectObject(pContentsArray);
- pPage->SetAtReference("Contents", pDocument, dwObjNum);
-
- if (!key.IsEmpty()) {
- CPDF_Stream* pNewContents = new CPDF_Stream(NULL, 0, new CPDF_Dictionary);
- dwObjNum = pDocument->AddIndirectObject(pNewContents);
- pContentsArray->AddReference(pDocument, dwObjNum);
-
- CFX_ByteString sStream;
- sStream.Format("q 1 0 0 1 0 0 cm /%s Do Q", key.c_str());
- pNewContents->SetData((const uint8_t*)sStream, sStream.GetLength(), FALSE,
- FALSE);
- }
-}
-
-CFX_Matrix GetMatrix(CFX_FloatRect rcAnnot,
- CFX_FloatRect rcStream,
- const CFX_Matrix& matrix) {
- if (rcStream.IsEmpty())
- return CFX_Matrix();
-
- matrix.TransformRect(rcStream);
- rcStream.Normalize();
-
- FX_FLOAT a = rcAnnot.Width() / rcStream.Width();
- FX_FLOAT d = rcAnnot.Height() / rcStream.Height();
-
- FX_FLOAT e = rcAnnot.left - rcStream.left * a;
- FX_FLOAT f = rcAnnot.bottom - rcStream.bottom * d;
- return CFX_Matrix(a, 0, 0, d, e, f);
-}
-
-void GetOffset(FX_FLOAT& fa,
- FX_FLOAT& fd,
- FX_FLOAT& fe,
- FX_FLOAT& ff,
- CFX_FloatRect rcAnnot,
- CFX_FloatRect rcStream,
- const CFX_Matrix& matrix) {
- FX_FLOAT fStreamWidth = 0.0f;
- FX_FLOAT fStreamHeight = 0.0f;
-
- if (matrix.a != 0 && matrix.d != 0) {
- fStreamWidth = rcStream.right - rcStream.left;
- fStreamHeight = rcStream.top - rcStream.bottom;
- } else {
- fStreamWidth = rcStream.top - rcStream.bottom;
- fStreamHeight = rcStream.right - rcStream.left;
- }
-
- FX_FLOAT x1 =
- matrix.a * rcStream.left + matrix.c * rcStream.bottom + matrix.e;
- FX_FLOAT y1 =
- matrix.b * rcStream.left + matrix.d * rcStream.bottom + matrix.f;
- FX_FLOAT x2 = matrix.a * rcStream.left + matrix.c * rcStream.top + matrix.e;
- FX_FLOAT y2 = matrix.b * rcStream.left + matrix.d * rcStream.top + matrix.f;
- FX_FLOAT x3 =
- matrix.a * rcStream.right + matrix.c * rcStream.bottom + matrix.e;
- FX_FLOAT y3 =
- matrix.b * rcStream.right + matrix.d * rcStream.bottom + matrix.f;
- FX_FLOAT x4 = matrix.a * rcStream.right + matrix.c * rcStream.top + matrix.e;
- FX_FLOAT y4 = matrix.b * rcStream.right + matrix.d * rcStream.top + matrix.f;
-
- FX_FLOAT left = std::min(std::min(x1, x2), std::min(x3, x4));
- FX_FLOAT bottom = std::min(std::min(y1, y2), std::min(y3, y4));
-
- fa = (rcAnnot.right - rcAnnot.left) / fStreamWidth;
- fd = (rcAnnot.top - rcAnnot.bottom) / fStreamHeight;
- fe = rcAnnot.left - left * fa;
- ff = rcAnnot.bottom - bottom * fd;
-}
-
-DLLEXPORT int STDCALL FPDFPage_Flatten(FPDF_PAGE page, int nFlag) {
- CPDF_Page* pPage = CPDFPageFromFPDFPage(page);
- if (!page) {
- return FLATTEN_FAIL;
- }
-
- CPDF_Document* pDocument = pPage->m_pDocument;
- CPDF_Dictionary* pPageDict = pPage->m_pFormDict;
-
- if (!pDocument || !pPageDict) {
- return FLATTEN_FAIL;
- }
-
- CPDF_ObjectArray ObjectArray;
- CPDF_RectArray RectArray;
-
- int iRet = FLATTEN_FAIL;
- iRet = ParserAnnots(pDocument, pPageDict, &RectArray, &ObjectArray, nFlag);
- if (iRet == FLATTEN_NOTHINGTODO || iRet == FLATTEN_FAIL)
- return iRet;
-
- CFX_FloatRect rcOriginalCB;
- CFX_FloatRect rcMerger = CalculateRect(&RectArray);
- CFX_FloatRect rcOriginalMB = pPageDict->GetRectBy("MediaBox");
-
- if (pPageDict->KeyExist("CropBox"))
- rcOriginalMB = pPageDict->GetRectBy("CropBox");
-
- if (rcOriginalMB.IsEmpty()) {
- rcOriginalMB = CFX_FloatRect(0.0f, 0.0f, 612.0f, 792.0f);
- }
-
- rcMerger.left =
- rcMerger.left < rcOriginalMB.left ? rcOriginalMB.left : rcMerger.left;
- rcMerger.right =
- rcMerger.right > rcOriginalMB.right ? rcOriginalMB.right : rcMerger.right;
- rcMerger.top =
- rcMerger.top > rcOriginalMB.top ? rcOriginalMB.top : rcMerger.top;
- rcMerger.bottom = rcMerger.bottom < rcOriginalMB.bottom ? rcOriginalMB.bottom
- : rcMerger.bottom;
-
- if (pPageDict->KeyExist("ArtBox"))
- rcOriginalCB = pPageDict->GetRectBy("ArtBox");
- else
- rcOriginalCB = rcOriginalMB;
-
- if (!rcOriginalMB.IsEmpty()) {
- CPDF_Array* pMediaBox = new CPDF_Array();
- pMediaBox->Add(new CPDF_Number(rcOriginalMB.left));
- pMediaBox->Add(new CPDF_Number(rcOriginalMB.bottom));
- pMediaBox->Add(new CPDF_Number(rcOriginalMB.right));
- pMediaBox->Add(new CPDF_Number(rcOriginalMB.top));
- pPageDict->SetAt("MediaBox", pMediaBox);
- }
-
- if (!rcOriginalCB.IsEmpty()) {
- CPDF_Array* pCropBox = new CPDF_Array();
- pCropBox->Add(new CPDF_Number(rcOriginalCB.left));
- pCropBox->Add(new CPDF_Number(rcOriginalCB.bottom));
- pCropBox->Add(new CPDF_Number(rcOriginalCB.right));
- pCropBox->Add(new CPDF_Number(rcOriginalCB.top));
- pPageDict->SetAt("ArtBox", pCropBox);
- }
-
- CPDF_Dictionary* pRes = pPageDict->GetDictBy("Resources");
- if (!pRes) {
- pRes = new CPDF_Dictionary;
- pPageDict->SetAt("Resources", pRes);
- }
-
- CPDF_Stream* pNewXObject = new CPDF_Stream(NULL, 0, new CPDF_Dictionary);
- FX_DWORD dwObjNum = pDocument->AddIndirectObject(pNewXObject);
- CPDF_Dictionary* pPageXObject = pRes->GetDictBy("XObject");
- if (!pPageXObject) {
- pPageXObject = new CPDF_Dictionary;
- pRes->SetAt("XObject", pPageXObject);
- }
-
- CFX_ByteString key = "";
- int nStreams = ObjectArray.GetSize();
-
- if (nStreams > 0) {
- for (int iKey = 0; /*iKey < 100*/; iKey++) {
- char sExtend[5] = {};
- FXSYS_itoa(iKey, sExtend, 10);
- key = CFX_ByteString("FFT") + CFX_ByteString(sExtend);
-
- if (!pPageXObject->KeyExist(key))
- break;
- }
- }
-
- SetPageContents(key, pPageDict, pDocument);
-
- CPDF_Dictionary* pNewXORes = NULL;
-
- if (!key.IsEmpty()) {
- pPageXObject->SetAtReference(key, pDocument, dwObjNum);
- CPDF_Dictionary* pNewOXbjectDic = pNewXObject->GetDict();
- pNewXORes = new CPDF_Dictionary;
- pNewOXbjectDic->SetAt("Resources", pNewXORes);
- pNewOXbjectDic->SetAtName("Type", "XObject");
- pNewOXbjectDic->SetAtName("Subtype", "Form");
- pNewOXbjectDic->SetAtInteger("FormType", 1);
- pNewOXbjectDic->SetAtName("Name", "FRM");
- CFX_FloatRect rcBBox = pPageDict->GetRectBy("ArtBox");
- pNewOXbjectDic->SetAtRect("BBox", rcBBox);
- }
-
- for (int i = 0; i < nStreams; i++) {
- CPDF_Dictionary* pAnnotDic = ObjectArray.GetAt(i);
- if (!pAnnotDic)
- continue;
-
- CFX_FloatRect rcAnnot = pAnnotDic->GetRectBy("Rect");
- rcAnnot.Normalize();
-
- CFX_ByteString sAnnotState = pAnnotDic->GetStringBy("AS");
- CPDF_Dictionary* pAnnotAP = pAnnotDic->GetDictBy("AP");
- if (!pAnnotAP)
- continue;
-
- CPDF_Stream* pAPStream = pAnnotAP->GetStreamBy("N");
- if (!pAPStream) {
- CPDF_Dictionary* pAPDic = pAnnotAP->GetDictBy("N");
- if (!pAPDic)
- continue;
-
- if (!sAnnotState.IsEmpty()) {
- pAPStream = pAPDic->GetStreamBy(sAnnotState);
- } else {
- auto it = pAPDic->begin();
- if (it != pAPDic->end()) {
- CPDF_Object* pFirstObj = it->second;
- if (pFirstObj) {
- if (pFirstObj->IsReference())
- pFirstObj = pFirstObj->GetDirect();
- if (!pFirstObj->IsStream())
- continue;
- pAPStream = pFirstObj->AsStream();
- }
- }
- }
- }
- if (!pAPStream)
- continue;
-
- CPDF_Dictionary* pAPDic = pAPStream->GetDict();
- CFX_Matrix matrix = pAPDic->GetMatrixBy("Matrix");
-
- CFX_FloatRect rcStream;
- if (pAPDic->KeyExist("Rect"))
- rcStream = pAPDic->GetRectBy("Rect");
- else if (pAPDic->KeyExist("BBox"))
- rcStream = pAPDic->GetRectBy("BBox");
-
- if (rcStream.IsEmpty())
- continue;
-
- CPDF_Object* pObj = pAPStream;
-
- if (pObj) {
- CPDF_Dictionary* pObjDic = pObj->GetDict();
- if (pObjDic) {
- pObjDic->SetAtName("Type", "XObject");
- pObjDic->SetAtName("Subtype", "Form");
- }
- }
-
- CPDF_Dictionary* pXObject = pNewXORes->GetDictBy("XObject");
- if (!pXObject) {
- pXObject = new CPDF_Dictionary;
- pNewXORes->SetAt("XObject", pXObject);
- }
-
- CFX_ByteString sFormName;
- sFormName.Format("F%d", i);
- FX_DWORD dwObjNum = pDocument->AddIndirectObject(pObj);
- pXObject->SetAtReference(sFormName, pDocument, dwObjNum);
-
- CPDF_StreamAcc acc;
- acc.LoadAllData(pNewXObject);
-
- const uint8_t* pData = acc.GetData();
- CFX_ByteString sStream(pData, acc.GetSize());
- CFX_ByteString sTemp;
-
- if (matrix.IsIdentity()) {
- matrix.a = 1.0f;
- matrix.b = 0.0f;
- matrix.c = 0.0f;
- matrix.d = 1.0f;
- matrix.e = 0.0f;
- matrix.f = 0.0f;
- }
-
- CFX_Matrix m = GetMatrix(rcAnnot, rcStream, matrix);
- sTemp.Format("q %f 0 0 %f %f %f cm /%s Do Q\n", m.a, m.d, m.e, m.f,
- sFormName.c_str());
- sStream += sTemp;
-
- pNewXObject->SetData((const uint8_t*)sStream, sStream.GetLength(), FALSE,
- FALSE);
- }
- pPageDict->RemoveAt("Annots");
-
- ObjectArray.RemoveAll();
- RectArray.RemoveAll();
-
- return FLATTEN_SUCCESS;
-}
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