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// 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 "core/fxcodec/codec/ccodec_iccmodule.h"
#include <algorithm>
#include <memory>
#include <vector>
#include "core/fxcodec/codec/codec_int.h"
namespace {
// For use with std::unique_ptr<cmsHPROFILE>.
struct CmsProfileDeleter {
inline void operator()(cmsHPROFILE p) { cmsCloseProfile(p); }
};
using ScopedCmsProfile = std::unique_ptr<void, CmsProfileDeleter>;
bool Check3Components(cmsColorSpaceSignature cs) {
switch (cs) {
case cmsSigGrayData:
case cmsSigCmykData:
return false;
default:
return true;
}
}
} // namespace
CLcmsCmm::CLcmsCmm(cmsHTRANSFORM hTransform,
int srcComponents,
bool bIsLab,
bool bNormal)
: m_hTransform(hTransform),
m_nSrcComponents(srcComponents),
m_bLab(bIsLab),
m_bNormal(bNormal) {}
CLcmsCmm::~CLcmsCmm() {
cmsDeleteTransform(m_hTransform);
}
CCodec_IccModule::CCodec_IccModule() {}
CCodec_IccModule::~CCodec_IccModule() {}
std::unique_ptr<CLcmsCmm> CCodec_IccModule::CreateTransform_sRGB(
pdfium::span<const uint8_t> span) {
ScopedCmsProfile srcProfile(cmsOpenProfileFromMem(span.data(), span.size()));
if (!srcProfile)
return nullptr;
ScopedCmsProfile dstProfile(cmsCreate_sRGBProfile());
if (!dstProfile)
return nullptr;
cmsColorSpaceSignature srcCS = cmsGetColorSpace(srcProfile.get());
uint32_t nSrcComponents = cmsChannelsOf(srcCS);
// According to PDF spec, number of components must be 1, 3, or 4.
if (nSrcComponents != 1 && nSrcComponents != 3 && nSrcComponents != 4)
return nullptr;
int srcFormat;
bool bLab = false;
bool bNormal = false;
if (srcCS == cmsSigLabData) {
srcFormat =
COLORSPACE_SH(PT_Lab) | CHANNELS_SH(nSrcComponents) | BYTES_SH(0);
bLab = true;
} else {
srcFormat =
COLORSPACE_SH(PT_ANY) | CHANNELS_SH(nSrcComponents) | BYTES_SH(1);
// TODO(thestig): Check to see if lcms2 supports more colorspaces that can
// be considered normal.
bNormal = srcCS == cmsSigGrayData || srcCS == cmsSigRgbData ||
srcCS == cmsSigCmykData;
}
cmsColorSpaceSignature dstCS = cmsGetColorSpace(dstProfile.get());
if (!Check3Components(dstCS))
return nullptr;
cmsHTRANSFORM hTransform = nullptr;
const int intent = 0;
switch (dstCS) {
case cmsSigRgbData:
hTransform = cmsCreateTransform(srcProfile.get(), srcFormat,
dstProfile.get(), TYPE_BGR_8, intent, 0);
break;
case cmsSigGrayData:
case cmsSigCmykData:
// Check3Components() already filtered these types.
NOTREACHED();
break;
default:
break;
}
if (!hTransform)
return nullptr;
return pdfium::MakeUnique<CLcmsCmm>(hTransform, nSrcComponents, bLab,
bNormal);
}
void CCodec_IccModule::Translate(CLcmsCmm* pTransform,
const float* pSrcValues,
float* pDestValues) {
if (!pTransform)
return;
uint32_t nSrcComponents = m_nComponents;
uint8_t output[4];
// TODO(npm): Currently the CmsDoTransform method is part of LCMS and it will
// apply some member of m_hTransform to the input. We need to go over all the
// places which set transform to verify that only nSrcComponents are used.
if (pTransform->IsLab()) {
std::vector<double> inputs(std::max(nSrcComponents, 16u));
for (uint32_t i = 0; i < nSrcComponents; ++i)
inputs[i] = pSrcValues[i];
cmsDoTransform(pTransform->transform(), inputs.data(), output, 1);
} else {
std::vector<uint8_t> inputs(std::max(nSrcComponents, 16u));
for (uint32_t i = 0; i < nSrcComponents; ++i) {
inputs[i] =
pdfium::clamp(static_cast<int>(pSrcValues[i] * 255.0f), 0, 255);
}
cmsDoTransform(pTransform->transform(), inputs.data(), output, 1);
}
pDestValues[0] = output[2] / 255.0f;
pDestValues[1] = output[1] / 255.0f;
pDestValues[2] = output[0] / 255.0f;
}
void CCodec_IccModule::TranslateScanline(CLcmsCmm* pTransform,
unsigned char* pDest,
const unsigned char* pSrc,
int32_t pixels) {
if (pTransform)
cmsDoTransform(pTransform->transform(), pSrc, pDest, pixels);
}
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