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// Copyright 2017 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/fxge/cfx_color.h"
#include <algorithm>
namespace {
bool InRange(float comp) {
return comp >= 0.0f && comp <= 1.0f;
}
CFX_Color ConvertCMYK2GRAY(float dC, float dM, float dY, float dK) {
if (!InRange(dC) || !InRange(dM) || !InRange(dY) || !InRange(dK))
return CFX_Color(COLORTYPE_GRAY);
return CFX_Color(
COLORTYPE_GRAY,
1.0f - std::min(1.0f, 0.3f * dC + 0.59f * dM + 0.11f * dY + dK));
}
CFX_Color ConvertGRAY2CMYK(float dGray) {
if (!InRange(dGray))
return CFX_Color(COLORTYPE_CMYK);
return CFX_Color(COLORTYPE_CMYK, 0.0f, 0.0f, 0.0f, 1.0f - dGray);
}
CFX_Color ConvertGRAY2RGB(float dGray) {
if (!InRange(dGray))
return CFX_Color(COLORTYPE_RGB);
return CFX_Color(COLORTYPE_RGB, dGray, dGray, dGray);
}
CFX_Color ConvertRGB2GRAY(float dR, float dG, float dB) {
if (!InRange(dR) || !InRange(dG) || !InRange(dB))
return CFX_Color(COLORTYPE_GRAY);
return CFX_Color(COLORTYPE_GRAY, 0.3f * dR + 0.59f * dG + 0.11f * dB);
}
CFX_Color ConvertCMYK2RGB(float dC, float dM, float dY, float dK) {
if (!InRange(dC) || !InRange(dM) || !InRange(dY) || !InRange(dK))
return CFX_Color(COLORTYPE_RGB);
return CFX_Color(COLORTYPE_RGB, 1.0f - std::min(1.0f, dC + dK),
1.0f - std::min(1.0f, dM + dK),
1.0f - std::min(1.0f, dY + dK));
}
CFX_Color ConvertRGB2CMYK(float dR, float dG, float dB) {
if (!InRange(dR) || !InRange(dG) || !InRange(dB))
return CFX_Color(COLORTYPE_CMYK);
float c = 1.0f - dR;
float m = 1.0f - dG;
float y = 1.0f - dB;
return CFX_Color(COLORTYPE_CMYK, c, m, y, std::min(c, std::min(m, y)));
}
} // namespace
CFX_Color CFX_Color::ConvertColorType(int32_t nConvertColorType) const {
if (nColorType == nConvertColorType)
return *this;
CFX_Color ret;
switch (nColorType) {
case COLORTYPE_TRANSPARENT:
ret = *this;
ret.nColorType = COLORTYPE_TRANSPARENT;
break;
case COLORTYPE_GRAY:
switch (nConvertColorType) {
case COLORTYPE_RGB:
ret = ConvertGRAY2RGB(fColor1);
break;
case COLORTYPE_CMYK:
ret = ConvertGRAY2CMYK(fColor1);
break;
}
break;
case COLORTYPE_RGB:
switch (nConvertColorType) {
case COLORTYPE_GRAY:
ret = ConvertRGB2GRAY(fColor1, fColor2, fColor3);
break;
case COLORTYPE_CMYK:
ret = ConvertRGB2CMYK(fColor1, fColor2, fColor3);
break;
}
break;
case COLORTYPE_CMYK:
switch (nConvertColorType) {
case COLORTYPE_GRAY:
ret = ConvertCMYK2GRAY(fColor1, fColor2, fColor3, fColor4);
break;
case COLORTYPE_RGB:
ret = ConvertCMYK2RGB(fColor1, fColor2, fColor3, fColor4);
break;
}
break;
}
return ret;
}
FX_COLORREF CFX_Color::ToFXColor(int32_t nTransparency) const {
CFX_Color ret;
switch (nColorType) {
case COLORTYPE_TRANSPARENT: {
ret = CFX_Color(COLORTYPE_TRANSPARENT, 0, 0, 0, 0);
break;
}
case COLORTYPE_GRAY: {
ret = ConvertGRAY2RGB(fColor1);
ret.fColor4 = nTransparency;
break;
}
case COLORTYPE_RGB: {
ret = CFX_Color(COLORTYPE_RGB, fColor1, fColor2, fColor3);
ret.fColor4 = nTransparency;
break;
}
case COLORTYPE_CMYK: {
ret = ConvertCMYK2RGB(fColor1, fColor2, fColor3, fColor4);
ret.fColor4 = nTransparency;
break;
}
}
return ArgbEncode(ret.fColor4, static_cast<int32_t>(ret.fColor1 * 255),
static_cast<int32_t>(ret.fColor2 * 255),
static_cast<int32_t>(ret.fColor3 * 255));
}
CFX_Color CFX_Color::operator-(float fColorSub) const {
CFX_Color sRet(nColorType);
switch (nColorType) {
case COLORTYPE_TRANSPARENT:
sRet.nColorType = COLORTYPE_RGB;
sRet.fColor1 = std::max(1.0f - fColorSub, 0.0f);
sRet.fColor2 = std::max(1.0f - fColorSub, 0.0f);
sRet.fColor3 = std::max(1.0f - fColorSub, 0.0f);
break;
case COLORTYPE_RGB:
case COLORTYPE_GRAY:
case COLORTYPE_CMYK:
sRet.fColor1 = std::max(fColor1 - fColorSub, 0.0f);
sRet.fColor2 = std::max(fColor2 - fColorSub, 0.0f);
sRet.fColor3 = std::max(fColor3 - fColorSub, 0.0f);
sRet.fColor4 = std::max(fColor4 - fColorSub, 0.0f);
break;
}
return sRet;
}
CFX_Color CFX_Color::operator/(float fColorDivide) const {
CFX_Color sRet(nColorType);
switch (nColorType) {
case COLORTYPE_TRANSPARENT:
sRet.nColorType = COLORTYPE_RGB;
sRet.fColor1 = 1.0f / fColorDivide;
sRet.fColor2 = 1.0f / fColorDivide;
sRet.fColor3 = 1.0f / fColorDivide;
break;
case COLORTYPE_RGB:
case COLORTYPE_GRAY:
case COLORTYPE_CMYK:
sRet = *this;
sRet.fColor1 /= fColorDivide;
sRet.fColor2 /= fColorDivide;
sRet.fColor3 /= fColorDivide;
sRet.fColor4 /= fColorDivide;
break;
}
return sRet;
}
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