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Diffstat (limited to 'core/fpdfapi/page/cpdf_contentparser.cpp')
-rw-r--r--core/fpdfapi/page/cpdf_contentparser.cpp215
1 files changed, 215 insertions, 0 deletions
diff --git a/core/fpdfapi/page/cpdf_contentparser.cpp b/core/fpdfapi/page/cpdf_contentparser.cpp
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index 0000000000..f581047835
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+++ b/core/fpdfapi/page/cpdf_contentparser.cpp
@@ -0,0 +1,215 @@
+// 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/page/pageint.h"
+
+#include "core/fpdfapi/font/cpdf_type3char.h"
+#include "core/fpdfapi/page/cpdf_allstates.h"
+#include "core/fpdfapi/page/cpdf_form.h"
+#include "core/fpdfapi/page/cpdf_page.h"
+#include "core/fpdfapi/page/cpdf_pageobject.h"
+#include "core/fpdfapi/page/cpdf_path.h"
+#include "core/fpdfapi/parser/cpdf_array.h"
+#include "core/fpdfapi/parser/cpdf_dictionary.h"
+#include "core/fpdfapi/parser/cpdf_stream.h"
+#include "core/fpdfapi/parser/cpdf_stream_acc.h"
+#include "core/fxcrt/fx_safe_types.h"
+
+CPDF_ContentParser::CPDF_ContentParser()
+ : m_Status(Ready),
+ m_InternalStage(STAGE_GETCONTENT),
+ m_pObjectHolder(nullptr),
+ m_bForm(false),
+ m_pType3Char(nullptr),
+ m_pData(nullptr),
+ m_Size(0),
+ m_CurrentOffset(0) {}
+
+CPDF_ContentParser::~CPDF_ContentParser() {
+ if (!m_pSingleStream)
+ FX_Free(m_pData);
+}
+
+void CPDF_ContentParser::Start(CPDF_Page* pPage) {
+ if (m_Status != Ready || !pPage || !pPage->m_pDocument ||
+ !pPage->m_pFormDict) {
+ m_Status = Done;
+ return;
+ }
+ m_pObjectHolder = pPage;
+ m_bForm = false;
+ m_Status = ToBeContinued;
+ m_InternalStage = STAGE_GETCONTENT;
+ m_CurrentOffset = 0;
+
+ CPDF_Object* pContent = pPage->m_pFormDict->GetDirectObjectFor("Contents");
+ if (!pContent) {
+ m_Status = Done;
+ return;
+ }
+ if (CPDF_Stream* pStream = pContent->AsStream()) {
+ m_nStreams = 0;
+ m_pSingleStream.reset(new CPDF_StreamAcc);
+ m_pSingleStream->LoadAllData(pStream, false);
+ } else if (CPDF_Array* pArray = pContent->AsArray()) {
+ m_nStreams = pArray->GetCount();
+ if (m_nStreams)
+ m_StreamArray.resize(m_nStreams);
+ else
+ m_Status = Done;
+ } else {
+ m_Status = Done;
+ }
+}
+
+void CPDF_ContentParser::Start(CPDF_Form* pForm,
+ CPDF_AllStates* pGraphicStates,
+ const CFX_Matrix* pParentMatrix,
+ CPDF_Type3Char* pType3Char,
+ int level) {
+ m_pType3Char = pType3Char;
+ m_pObjectHolder = pForm;
+ m_bForm = true;
+ CFX_Matrix form_matrix = pForm->m_pFormDict->GetMatrixFor("Matrix");
+ if (pGraphicStates)
+ form_matrix.Concat(pGraphicStates->m_CTM);
+ CPDF_Array* pBBox = pForm->m_pFormDict->GetArrayFor("BBox");
+ CFX_FloatRect form_bbox;
+ CPDF_Path ClipPath;
+ if (pBBox) {
+ form_bbox = pBBox->GetRect();
+ ClipPath.Emplace();
+ ClipPath.AppendRect(form_bbox.left, form_bbox.bottom, form_bbox.right,
+ form_bbox.top);
+ ClipPath.Transform(&form_matrix);
+ if (pParentMatrix)
+ ClipPath.Transform(pParentMatrix);
+ form_bbox.Transform(&form_matrix);
+ if (pParentMatrix)
+ form_bbox.Transform(pParentMatrix);
+ }
+ CPDF_Dictionary* pResources = pForm->m_pFormDict->GetDictFor("Resources");
+ m_pParser.reset(new CPDF_StreamContentParser(
+ pForm->m_pDocument, pForm->m_pPageResources, pForm->m_pResources,
+ pParentMatrix, pForm, pResources, &form_bbox, pGraphicStates, level));
+ m_pParser->GetCurStates()->m_CTM = form_matrix;
+ m_pParser->GetCurStates()->m_ParentMatrix = form_matrix;
+ if (ClipPath) {
+ m_pParser->GetCurStates()->m_ClipPath.AppendPath(ClipPath, FXFILL_WINDING,
+ true);
+ }
+ if (pForm->m_Transparency & PDFTRANS_GROUP) {
+ CPDF_GeneralState* pState = &m_pParser->GetCurStates()->m_GeneralState;
+ pState->SetBlendType(FXDIB_BLEND_NORMAL);
+ pState->SetStrokeAlpha(1.0f);
+ pState->SetFillAlpha(1.0f);
+ pState->SetSoftMask(nullptr);
+ }
+ m_nStreams = 0;
+ m_pSingleStream.reset(new CPDF_StreamAcc);
+ m_pSingleStream->LoadAllData(pForm->m_pFormStream, false);
+ m_pData = (uint8_t*)m_pSingleStream->GetData();
+ m_Size = m_pSingleStream->GetSize();
+ m_Status = ToBeContinued;
+ m_InternalStage = STAGE_PARSE;
+ m_CurrentOffset = 0;
+}
+
+void CPDF_ContentParser::Continue(IFX_Pause* pPause) {
+ int steps = 0;
+ while (m_Status == ToBeContinued) {
+ if (m_InternalStage == STAGE_GETCONTENT) {
+ if (m_CurrentOffset == m_nStreams) {
+ if (!m_StreamArray.empty()) {
+ FX_SAFE_UINT32 safeSize = 0;
+ for (const auto& stream : m_StreamArray) {
+ safeSize += stream->GetSize();
+ safeSize += 1;
+ }
+ if (!safeSize.IsValid()) {
+ m_Status = Done;
+ return;
+ }
+ m_Size = safeSize.ValueOrDie();
+ m_pData = FX_Alloc(uint8_t, m_Size);
+ uint32_t pos = 0;
+ for (const auto& stream : m_StreamArray) {
+ FXSYS_memcpy(m_pData + pos, stream->GetData(), stream->GetSize());
+ pos += stream->GetSize();
+ m_pData[pos++] = ' ';
+ }
+ m_StreamArray.clear();
+ } else {
+ m_pData = (uint8_t*)m_pSingleStream->GetData();
+ m_Size = m_pSingleStream->GetSize();
+ }
+ m_InternalStage = STAGE_PARSE;
+ m_CurrentOffset = 0;
+ } else {
+ CPDF_Array* pContent =
+ m_pObjectHolder->m_pFormDict->GetArrayFor("Contents");
+ m_StreamArray[m_CurrentOffset].reset(new CPDF_StreamAcc);
+ CPDF_Stream* pStreamObj = ToStream(
+ pContent ? pContent->GetDirectObjectAt(m_CurrentOffset) : nullptr);
+ m_StreamArray[m_CurrentOffset]->LoadAllData(pStreamObj, false);
+ m_CurrentOffset++;
+ }
+ }
+ if (m_InternalStage == STAGE_PARSE) {
+ if (!m_pParser) {
+ m_pParser.reset(new CPDF_StreamContentParser(
+ m_pObjectHolder->m_pDocument, m_pObjectHolder->m_pPageResources,
+ nullptr, nullptr, m_pObjectHolder, m_pObjectHolder->m_pResources,
+ &m_pObjectHolder->m_BBox, nullptr, 0));
+ m_pParser->GetCurStates()->m_ColorState.SetDefault();
+ }
+ if (m_CurrentOffset >= m_Size) {
+ m_InternalStage = STAGE_CHECKCLIP;
+ } else {
+ m_CurrentOffset +=
+ m_pParser->Parse(m_pData + m_CurrentOffset,
+ m_Size - m_CurrentOffset, PARSE_STEP_LIMIT);
+ }
+ }
+ if (m_InternalStage == STAGE_CHECKCLIP) {
+ if (m_pType3Char) {
+ m_pType3Char->m_bColored = m_pParser->IsColored();
+ m_pType3Char->m_Width =
+ FXSYS_round(m_pParser->GetType3Data()[0] * 1000);
+ m_pType3Char->m_BBox.left =
+ FXSYS_round(m_pParser->GetType3Data()[2] * 1000);
+ m_pType3Char->m_BBox.bottom =
+ FXSYS_round(m_pParser->GetType3Data()[3] * 1000);
+ m_pType3Char->m_BBox.right =
+ FXSYS_round(m_pParser->GetType3Data()[4] * 1000);
+ m_pType3Char->m_BBox.top =
+ FXSYS_round(m_pParser->GetType3Data()[5] * 1000);
+ }
+ for (auto& pObj : *m_pObjectHolder->GetPageObjectList()) {
+ if (!pObj->m_ClipPath)
+ continue;
+ if (pObj->m_ClipPath.GetPathCount() != 1)
+ continue;
+ if (pObj->m_ClipPath.GetTextCount())
+ continue;
+ CPDF_Path ClipPath = pObj->m_ClipPath.GetPath(0);
+ if (!ClipPath.IsRect() || pObj->IsShading())
+ continue;
+ CFX_FloatRect old_rect(ClipPath.GetPointX(0), ClipPath.GetPointY(0),
+ ClipPath.GetPointX(2), ClipPath.GetPointY(2));
+ CFX_FloatRect obj_rect(pObj->m_Left, pObj->m_Bottom, pObj->m_Right,
+ pObj->m_Top);
+ if (old_rect.Contains(obj_rect))
+ pObj->m_ClipPath.SetNull();
+ }
+ m_Status = Done;
+ return;
+ }
+ steps++;
+ if (pPause && pPause->NeedToPauseNow())
+ break;
+ }
+}