// Copyright 2016 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "core/fpdfapi/fpdf_page/cpdf_allstates.h"
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#include "core/fpdfapi/fpdf_page/pageint.h"
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#include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
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#include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h"
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namespace {
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FX_FLOAT ClipFloat(FX_FLOAT f) {
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return std::max(0.0f, std::min(1.0f, f));
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}
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} // namespace
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CPDF_AllStates::CPDF_AllStates() {
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m_TextX = m_TextY = m_TextLineX = m_TextLineY = 0;
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m_TextLeading = 0;
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m_TextRise = 0;
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m_TextHorzScale = 1.0f;
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}
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CPDF_AllStates::~CPDF_AllStates() {}
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void CPDF_AllStates::Copy(const CPDF_AllStates& src) {
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CopyStates(src);
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m_TextMatrix.Copy(src.m_TextMatrix);
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m_ParentMatrix.Copy(src.m_ParentMatrix);
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m_CTM.Copy(src.m_CTM);
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m_TextX = src.m_TextX;
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m_TextY = src.m_TextY;
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m_TextLineX = src.m_TextLineX;
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m_TextLineY = src.m_TextLineY;
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m_TextLeading = src.m_TextLeading;
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m_TextRise = src.m_TextRise;
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m_TextHorzScale = src.m_TextHorzScale;
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}
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void CPDF_AllStates::SetLineDash(CPDF_Array* pArray,
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FX_FLOAT phase,
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FX_FLOAT scale) {
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CFX_GraphStateData* pData = m_GraphState.GetModify();
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pData->m_DashPhase = phase * scale;
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pData->SetDashCount(static_cast<int>(pArray->GetCount()));
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for (size_t i = 0; i < pArray->GetCount(); i++)
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pData->m_DashArray[i] = pArray->GetNumberAt(i) * scale;
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}
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void CPDF_AllStates::ProcessExtGS(CPDF_Dictionary* pGS,
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CPDF_StreamContentParser* pParser) {
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CPDF_GeneralStateData* pGeneralState = m_GeneralState.GetModify();
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for (const auto& it : *pGS) {
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const CFX_ByteString& key_str = it.first;
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CPDF_Object* pElement = it.second;
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CPDF_Object* pObject = pElement ? pElement->GetDirect() : nullptr;
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if (!pObject)
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continue;
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uint32_t key = key_str.GetID();
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switch (key) {
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case FXBSTR_ID('L', 'W', 0, 0):
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m_GraphState.GetModify()->m_LineWidth = pObject->GetNumber();
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break;
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case FXBSTR_ID('L', 'C', 0, 0):
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m_GraphState.GetModify()->m_LineCap =
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(CFX_GraphStateData::LineCap)pObject->GetInteger();
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break;
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case FXBSTR_ID('L', 'J', 0, 0):
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m_GraphState.GetModify()->m_LineJoin =
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(CFX_GraphStateData::LineJoin)pObject->GetInteger();
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break;
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case FXBSTR_ID('M', 'L', 0, 0):
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m_GraphState.GetModify()->m_MiterLimit = pObject->GetNumber();
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break;
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case FXBSTR_ID('D', 0, 0, 0): {
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CPDF_Array* pDash = pObject->AsArray();
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if (!pDash)
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break;
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CPDF_Array* pArray = pDash->GetArrayAt(0);
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if (!pArray)
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break;
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SetLineDash(pArray, pDash->GetNumberAt(1), 1.0f);
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break;
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}
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case FXBSTR_ID('R', 'I', 0, 0):
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m_GeneralState.SetRenderIntent(pObject->GetString());
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break;
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case FXBSTR_ID('F', 'o', 'n', 't'): {
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CPDF_Array* pFont = pObject->AsArray();
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if (!pFont)
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break;
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m_TextState.GetModify()->m_FontSize = pFont->GetNumberAt(1);
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m_TextState.SetFont(pParser->FindFont(pFont->GetStringAt(0)));
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break;
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}
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case FXBSTR_ID('T', 'R', 0, 0):
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if (pGS->KeyExist("TR2")) {
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continue;
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}
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case FXBSTR_ID('T', 'R', '2', 0):
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pGeneralState->m_pTR =
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(pObject && !pObject->IsName()) ? pObject : nullptr;
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break;
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case FXBSTR_ID('B', 'M', 0, 0): {
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CPDF_Array* pArray = pObject->AsArray();
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CFX_ByteString mode =
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pArray ? pArray->GetStringAt(0) : pObject->GetString();
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pGeneralState->SetBlendMode(mode.AsStringC());
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if (pGeneralState->m_BlendType > FXDIB_BLEND_MULTIPLY) {
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pParser->GetPageObjectHolder()->SetBackgroundAlphaNeeded(TRUE);
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}
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break;
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}
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case FXBSTR_ID('S', 'M', 'a', 's'):
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if (ToDictionary(pObject)) {
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pGeneralState->m_pSoftMask = pObject;
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FXSYS_memcpy(pGeneralState->m_SMaskMatrix,
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&pParser->GetCurStates()->m_CTM, sizeof(CFX_Matrix));
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} else {
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pGeneralState->m_pSoftMask = nullptr;
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}
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break;
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case FXBSTR_ID('C', 'A', 0, 0):
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pGeneralState->m_StrokeAlpha = ClipFloat(pObject->GetNumber());
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break;
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case FXBSTR_ID('c', 'a', 0, 0):
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pGeneralState->m_FillAlpha = ClipFloat(pObject->GetNumber());
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break;
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case FXBSTR_ID('O', 'P', 0, 0):
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pGeneralState->m_StrokeOP = pObject->GetInteger();
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if (!pGS->KeyExist("op")) {
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pGeneralState->m_FillOP = pObject->GetInteger();
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}
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break;
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case FXBSTR_ID('o', 'p', 0, 0):
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pGeneralState->m_FillOP = pObject->GetInteger();
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break;
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case FXBSTR_ID('O', 'P', 'M', 0):
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pGeneralState->m_OPMode = pObject->GetInteger();
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break;
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case FXBSTR_ID('B', 'G', 0, 0):
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if (pGS->KeyExist("BG2")) {
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continue;
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}
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case FXBSTR_ID('B', 'G', '2', 0):
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pGeneralState->m_pBG = pObject;
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break;
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case FXBSTR_ID('U', 'C', 'R', 0):
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if (pGS->KeyExist("UCR2")) {
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continue;
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}
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case FXBSTR_ID('U', 'C', 'R', '2'):
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pGeneralState->m_pUCR = pObject;
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break;
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case FXBSTR_ID('H', 'T', 0, 0):
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pGeneralState->m_pHT = pObject;
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break;
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case FXBSTR_ID('F', 'L', 0, 0):
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pGeneralState->m_Flatness = pObject->GetNumber();
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break;
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case FXBSTR_ID('S', 'M', 0, 0):
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pGeneralState->m_Smoothness = pObject->GetNumber();
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break;
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case FXBSTR_ID('S', 'A', 0, 0):
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pGeneralState->m_StrokeAdjust = pObject->GetInteger();
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break;
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case FXBSTR_ID('A', 'I', 'S', 0):
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pGeneralState->m_AlphaSource = pObject->GetInteger();
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break;
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case FXBSTR_ID('T', 'K', 0, 0):
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pGeneralState->m_TextKnockout = pObject->GetInteger();
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break;
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}
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}
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pGeneralState->m_Matrix = m_CTM;
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}
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