| // 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> |
| |
| #include "third_party/base/notreached.h" |
| |
| // Color types are ordered by increasing number of components so we can choose |
| // a best color type during some conversions. |
| static_assert(CFX_Color::Type::kTransparent < CFX_Color::Type::kGray, |
| "color type values must be ordered"); |
| static_assert(CFX_Color::Type::kGray < CFX_Color::Type::kRGB, |
| "color type values must be ordered"); |
| static_assert(CFX_Color::Type::kRGB < CFX_Color::Type::kCMYK, |
| "color type values must be ordered"); |
| |
| 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(CFX_Color::Type::kGray); |
| return CFX_Color( |
| CFX_Color::Type::kGray, |
| 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(CFX_Color::Type::kCMYK); |
| return CFX_Color(CFX_Color::Type::kCMYK, 0.0f, 0.0f, 0.0f, 1.0f - dGray); |
| } |
| |
| CFX_Color ConvertGRAY2RGB(float dGray) { |
| if (!InRange(dGray)) |
| return CFX_Color(CFX_Color::Type::kRGB); |
| return CFX_Color(CFX_Color::Type::kRGB, dGray, dGray, dGray); |
| } |
| |
| CFX_Color ConvertRGB2GRAY(float dR, float dG, float dB) { |
| if (!InRange(dR) || !InRange(dG) || !InRange(dB)) |
| return CFX_Color(CFX_Color::Type::kGray); |
| return CFX_Color(CFX_Color::Type::kGray, 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(CFX_Color::Type::kRGB); |
| return CFX_Color(CFX_Color::Type::kRGB, 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(CFX_Color::Type::kCMYK); |
| |
| float c = 1.0f - dR; |
| float m = 1.0f - dG; |
| float y = 1.0f - dB; |
| return CFX_Color(CFX_Color::Type::kCMYK, c, m, y, |
| std::min(c, std::min(m, y))); |
| } |
| |
| } // namespace |
| |
| CFX_Color CFX_Color::ConvertColorType(Type nConvertColorType) const { |
| if (nColorType == nConvertColorType) |
| return *this; |
| |
| CFX_Color ret; |
| switch (nColorType) { |
| case CFX_Color::Type::kTransparent: |
| ret = *this; |
| ret.nColorType = CFX_Color::Type::kTransparent; |
| break; |
| case CFX_Color::Type::kGray: |
| switch (nConvertColorType) { |
| case CFX_Color::Type::kTransparent: |
| break; |
| case CFX_Color::Type::kGray: |
| NOTREACHED(); |
| break; |
| case CFX_Color::Type::kRGB: |
| ret = ConvertGRAY2RGB(fColor1); |
| break; |
| case CFX_Color::Type::kCMYK: |
| ret = ConvertGRAY2CMYK(fColor1); |
| break; |
| } |
| break; |
| case CFX_Color::Type::kRGB: |
| switch (nConvertColorType) { |
| case CFX_Color::Type::kTransparent: |
| break; |
| case CFX_Color::Type::kGray: |
| ret = ConvertRGB2GRAY(fColor1, fColor2, fColor3); |
| break; |
| case CFX_Color::Type::kRGB: |
| NOTREACHED(); |
| break; |
| case CFX_Color::Type::kCMYK: |
| ret = ConvertRGB2CMYK(fColor1, fColor2, fColor3); |
| break; |
| } |
| break; |
| case CFX_Color::Type::kCMYK: |
| switch (nConvertColorType) { |
| case CFX_Color::Type::kTransparent: |
| break; |
| case CFX_Color::Type::kGray: |
| ret = ConvertCMYK2GRAY(fColor1, fColor2, fColor3, fColor4); |
| break; |
| case CFX_Color::Type::kRGB: |
| ret = ConvertCMYK2RGB(fColor1, fColor2, fColor3, fColor4); |
| break; |
| case CFX_Color::Type::kCMYK: |
| NOTREACHED(); |
| break; |
| } |
| break; |
| } |
| return ret; |
| } |
| |
| FX_COLORREF CFX_Color::ToFXColor(int32_t nTransparency) const { |
| CFX_Color ret; |
| switch (nColorType) { |
| case CFX_Color::Type::kTransparent: { |
| ret = CFX_Color(CFX_Color::Type::kTransparent, 0, 0, 0, 0); |
| break; |
| } |
| case CFX_Color::Type::kGray: { |
| ret = ConvertGRAY2RGB(fColor1); |
| ret.fColor4 = nTransparency; |
| break; |
| } |
| case CFX_Color::Type::kRGB: { |
| ret = CFX_Color(CFX_Color::Type::kRGB, fColor1, fColor2, fColor3); |
| ret.fColor4 = nTransparency; |
| break; |
| } |
| case CFX_Color::Type::kCMYK: { |
| 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 CFX_Color::Type::kTransparent: |
| sRet.nColorType = CFX_Color::Type::kRGB; |
| 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 CFX_Color::Type::kRGB: |
| case CFX_Color::Type::kGray: |
| case CFX_Color::Type::kCMYK: |
| 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 CFX_Color::Type::kTransparent: |
| sRet.nColorType = CFX_Color::Type::kRGB; |
| sRet.fColor1 = 1.0f / fColorDivide; |
| sRet.fColor2 = 1.0f / fColorDivide; |
| sRet.fColor3 = 1.0f / fColorDivide; |
| break; |
| case CFX_Color::Type::kRGB: |
| case CFX_Color::Type::kGray: |
| case CFX_Color::Type::kCMYK: |
| sRet = *this; |
| sRet.fColor1 /= fColorDivide; |
| sRet.fColor2 /= fColorDivide; |
| sRet.fColor3 /= fColorDivide; |
| sRet.fColor4 /= fColorDivide; |
| break; |
| } |
| return sRet; |
| } |