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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/render/cpdf_docrenderdata.h"
#include <memory>
#include "core/fpdfapi/font/cpdf_type3font.h"
#include "core/fpdfapi/page/pageint.h"
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_document.h"
#include "core/fpdfapi/render/cpdf_transferfunc.h"
#include "core/fpdfapi/render/cpdf_type3cache.h"
#include "core/fpdfapi/render/render_int.h"
namespace {
const int kMaxOutputs = 16;
} // namespace
CPDF_DocRenderData::CPDF_DocRenderData(CPDF_Document* pPDFDoc)
: m_pPDFDoc(pPDFDoc) {}
CPDF_DocRenderData::~CPDF_DocRenderData() {
Clear(true);
}
void CPDF_DocRenderData::Clear(bool bRelease) {
for (auto it = m_Type3FaceMap.begin(); it != m_Type3FaceMap.end();) {
auto curr_it = it++;
CPDF_CountedObject<CPDF_Type3Cache>* cache = curr_it->second;
if (bRelease || cache->use_count() < 2) {
delete cache->get();
delete cache;
m_Type3FaceMap.erase(curr_it);
}
}
for (auto it = m_TransferFuncMap.begin(); it != m_TransferFuncMap.end();) {
auto curr_it = it++;
CPDF_CountedObject<CPDF_TransferFunc>* value = curr_it->second;
if (bRelease || value->use_count() < 2) {
delete value->get();
delete value;
m_TransferFuncMap.erase(curr_it);
}
}
}
CPDF_Type3Cache* CPDF_DocRenderData::GetCachedType3(CPDF_Type3Font* pFont) {
CPDF_CountedObject<CPDF_Type3Cache>* pCache;
auto it = m_Type3FaceMap.find(pFont);
if (it == m_Type3FaceMap.end()) {
CPDF_Type3Cache* pType3 = new CPDF_Type3Cache(pFont);
pCache = new CPDF_CountedObject<CPDF_Type3Cache>(pType3);
m_Type3FaceMap[pFont] = pCache;
} else {
pCache = it->second;
}
return pCache->AddRef();
}
void CPDF_DocRenderData::ReleaseCachedType3(CPDF_Type3Font* pFont) {
auto it = m_Type3FaceMap.find(pFont);
if (it != m_Type3FaceMap.end()) {
it->second->RemoveRef();
if (it->second->use_count() < 2) {
delete it->second->get();
delete it->second;
m_Type3FaceMap.erase(it);
}
}
}
CPDF_TransferFunc* CPDF_DocRenderData::GetTransferFunc(CPDF_Object* pObj) {
if (!pObj)
return nullptr;
auto it = m_TransferFuncMap.find(pObj);
if (it != m_TransferFuncMap.end()) {
CPDF_CountedObject<CPDF_TransferFunc>* pTransferCounter = it->second;
return pTransferCounter->AddRef();
}
std::unique_ptr<CPDF_Function> pFuncs[3];
bool bUniTransfer = true;
bool bIdentity = true;
if (CPDF_Array* pArray = pObj->AsArray()) {
bUniTransfer = false;
if (pArray->GetCount() < 3)
return nullptr;
for (uint32_t i = 0; i < 3; ++i) {
pFuncs[2 - i] = CPDF_Function::Load(pArray->GetDirectObjectAt(i));
if (!pFuncs[2 - i])
return nullptr;
}
} else {
pFuncs[0] = CPDF_Function::Load(pObj);
if (!pFuncs[0])
return nullptr;
}
CPDF_TransferFunc* pTransfer = new CPDF_TransferFunc(m_pPDFDoc);
CPDF_CountedObject<CPDF_TransferFunc>* pTransferCounter =
new CPDF_CountedObject<CPDF_TransferFunc>(pTransfer);
m_TransferFuncMap[pObj] = pTransferCounter;
FX_FLOAT output[kMaxOutputs];
FXSYS_memset(output, 0, sizeof(output));
FX_FLOAT input;
int noutput;
for (int v = 0; v < 256; ++v) {
input = (FX_FLOAT)v / 255.0f;
if (bUniTransfer) {
if (pFuncs[0] && pFuncs[0]->CountOutputs() <= kMaxOutputs)
pFuncs[0]->Call(&input, 1, output, noutput);
int o = FXSYS_round(output[0] * 255);
if (o != v)
bIdentity = false;
for (int i = 0; i < 3; ++i)
pTransfer->m_Samples[i * 256 + v] = o;
continue;
}
for (int i = 0; i < 3; ++i) {
if (!pFuncs[i] || pFuncs[i]->CountOutputs() > kMaxOutputs) {
pTransfer->m_Samples[i * 256 + v] = v;
continue;
}
pFuncs[i]->Call(&input, 1, output, noutput);
int o = FXSYS_round(output[0] * 255);
if (o != v)
bIdentity = false;
pTransfer->m_Samples[i * 256 + v] = o;
}
}
pTransfer->m_bIdentity = bIdentity;
return pTransferCounter->AddRef();
}
void CPDF_DocRenderData::ReleaseTransferFunc(CPDF_Object* pObj) {
auto it = m_TransferFuncMap.find(pObj);
if (it != m_TransferFuncMap.end()) {
it->second->RemoveRef();
if (it->second->use_count() < 2) {
delete it->second->get();
delete it->second;
m_TransferFuncMap.erase(it);
}
}
}
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