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authorDan Sinclair <dsinclair@chromium.org>2016-03-14 13:51:24 -0400
committerDan Sinclair <dsinclair@chromium.org>2016-03-14 13:51:24 -0400
commitf766ad219f66543654520f6a1955836f519e26d1 (patch)
tree2edf8bc93b89503a3669f7add5b6c2a407b8a78c /fpdfsdk/fpdf_flatten.cpp
parent54b0abed08048008498471e39b7c72b034474090 (diff)
downloadpdfium-f766ad219f66543654520f6a1955836f519e26d1.tar.xz
Move fpdfsdk/src up to fpdfsdk/.
This CL moves the files in fpdfsdk/src/ up one level to fpdfsdk/ and fixes up the include paths, include guards and build files. R=tsepez@chromium.org Review URL: https://codereview.chromium.org/1799773002 .
Diffstat (limited to 'fpdfsdk/fpdf_flatten.cpp')
-rw-r--r--fpdfsdk/fpdf_flatten.cpp518
1 files changed, 518 insertions, 0 deletions
diff --git a/fpdfsdk/fpdf_flatten.cpp b/fpdfsdk/fpdf_flatten.cpp
new file mode 100644
index 0000000000..cca63d6b76
--- /dev/null
+++ b/fpdfsdk/fpdf_flatten.cpp
@@ -0,0 +1,518 @@
+// 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;
+}