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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/page/cpdf_allstates.h"
#include <algorithm>
#include "core/fpdfapi/page/cpdf_pageobjectholder.h"
#include "core/fpdfapi/page/cpdf_streamcontentparser.h"
#include "core/fpdfapi/page/pageint.h"
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fxge/cfx_graphstatedata.h"
namespace {
float ClipFloat(float f) {
return std::max(0.0f, std::min(1.0f, f));
}
} // namespace
CPDF_AllStates::CPDF_AllStates()
: m_TextLeading(0), m_TextRise(0), m_TextHorzScale(1.0f) {}
CPDF_AllStates::~CPDF_AllStates() {}
void CPDF_AllStates::Copy(const CPDF_AllStates& src) {
CopyStates(src);
m_TextMatrix = src.m_TextMatrix;
m_ParentMatrix = src.m_ParentMatrix;
m_CTM = src.m_CTM;
m_TextPos = src.m_TextPos;
m_TextLinePos = src.m_TextLinePos;
m_TextLeading = src.m_TextLeading;
m_TextRise = src.m_TextRise;
m_TextHorzScale = src.m_TextHorzScale;
}
void CPDF_AllStates::SetLineDash(CPDF_Array* pArray, float phase, float scale) {
m_GraphState.SetLineDash(pArray, phase, scale);
}
void CPDF_AllStates::ProcessExtGS(CPDF_Dictionary* pGS,
CPDF_StreamContentParser* pParser) {
for (const auto& it : *pGS) {
const CFX_ByteString& key_str = it.first;
CPDF_Object* pElement = it.second.get();
CPDF_Object* pObject = pElement ? pElement->GetDirect() : nullptr;
if (!pObject)
continue;
uint32_t key = key_str.GetID();
switch (key) {
case FXBSTR_ID('L', 'W', 0, 0):
m_GraphState.SetLineWidth(pObject->GetNumber());
break;
case FXBSTR_ID('L', 'C', 0, 0):
m_GraphState.SetLineCap(
static_cast<CFX_GraphStateData::LineCap>(pObject->GetInteger()));
break;
case FXBSTR_ID('L', 'J', 0, 0):
m_GraphState.SetLineJoin(
static_cast<CFX_GraphStateData::LineJoin>(pObject->GetInteger()));
break;
case FXBSTR_ID('M', 'L', 0, 0):
m_GraphState.SetMiterLimit(pObject->GetNumber());
break;
case FXBSTR_ID('D', 0, 0, 0): {
CPDF_Array* pDash = pObject->AsArray();
if (!pDash)
break;
CPDF_Array* pArray = pDash->GetArrayAt(0);
if (!pArray)
break;
SetLineDash(pArray, pDash->GetNumberAt(1), 1.0f);
break;
}
case FXBSTR_ID('R', 'I', 0, 0):
m_GeneralState.SetRenderIntent(pObject->GetString());
break;
case FXBSTR_ID('F', 'o', 'n', 't'): {
CPDF_Array* pFont = pObject->AsArray();
if (!pFont)
break;
m_TextState.SetFontSize(pFont->GetNumberAt(1));
m_TextState.SetFont(pParser->FindFont(pFont->GetStringAt(0)));
break;
}
case FXBSTR_ID('T', 'R', 0, 0):
if (pGS->KeyExist("TR2")) {
continue;
}
case FXBSTR_ID('T', 'R', '2', 0):
m_GeneralState.SetTR(pObject && !pObject->IsName() ? pObject : nullptr);
break;
case FXBSTR_ID('B', 'M', 0, 0): {
CPDF_Array* pArray = pObject->AsArray();
m_GeneralState.SetBlendMode(pArray ? pArray->GetStringAt(0)
: pObject->GetString());
if (m_GeneralState.GetBlendType() > FXDIB_BLEND_MULTIPLY)
pParser->GetPageObjectHolder()->SetBackgroundAlphaNeeded(true);
break;
}
case FXBSTR_ID('S', 'M', 'a', 's'):
if (ToDictionary(pObject)) {
m_GeneralState.SetSoftMask(pObject);
m_GeneralState.SetSMaskMatrix(pParser->GetCurStates()->m_CTM);
} else {
m_GeneralState.SetSoftMask(nullptr);
}
break;
case FXBSTR_ID('C', 'A', 0, 0):
m_GeneralState.SetStrokeAlpha(ClipFloat(pObject->GetNumber()));
break;
case FXBSTR_ID('c', 'a', 0, 0):
m_GeneralState.SetFillAlpha(ClipFloat(pObject->GetNumber()));
break;
case FXBSTR_ID('O', 'P', 0, 0):
m_GeneralState.SetStrokeOP(!!pObject->GetInteger());
if (!pGS->KeyExist("op"))
m_GeneralState.SetFillOP(!!pObject->GetInteger());
break;
case FXBSTR_ID('o', 'p', 0, 0):
m_GeneralState.SetFillOP(!!pObject->GetInteger());
break;
case FXBSTR_ID('O', 'P', 'M', 0):
m_GeneralState.SetOPMode(pObject->GetInteger());
break;
case FXBSTR_ID('B', 'G', 0, 0):
if (pGS->KeyExist("BG2")) {
continue;
}
case FXBSTR_ID('B', 'G', '2', 0):
m_GeneralState.SetBG(pObject);
break;
case FXBSTR_ID('U', 'C', 'R', 0):
if (pGS->KeyExist("UCR2")) {
continue;
}
case FXBSTR_ID('U', 'C', 'R', '2'):
m_GeneralState.SetUCR(pObject);
break;
case FXBSTR_ID('H', 'T', 0, 0):
m_GeneralState.SetHT(pObject);
break;
case FXBSTR_ID('F', 'L', 0, 0):
m_GeneralState.SetFlatness(pObject->GetNumber());
break;
case FXBSTR_ID('S', 'M', 0, 0):
m_GeneralState.SetSmoothness(pObject->GetNumber());
break;
case FXBSTR_ID('S', 'A', 0, 0):
m_GeneralState.SetStrokeAdjust(!!pObject->GetInteger());
break;
case FXBSTR_ID('A', 'I', 'S', 0):
m_GeneralState.SetAlphaSource(!!pObject->GetInteger());
break;
case FXBSTR_ID('T', 'K', 0, 0):
m_GeneralState.SetTextKnockout(!!pObject->GetInteger());
break;
}
}
m_GeneralState.SetMatrix(m_CTM);
}
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