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Diffstat (limited to 'fpdfsdk/pdfwindow/cpwl_color.cpp')
| -rw-r--r-- | fpdfsdk/pdfwindow/cpwl_color.cpp | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/fpdfsdk/pdfwindow/cpwl_color.cpp b/fpdfsdk/pdfwindow/cpwl_color.cpp new file mode 100644 index 0000000000..9c9ca3eff0 --- /dev/null +++ b/fpdfsdk/pdfwindow/cpwl_color.cpp @@ -0,0 +1,179 @@ +// 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 "fpdfsdk/pdfwindow/cpwl_color.h" + +#include <algorithm> + +namespace { + +bool InRange(FX_FLOAT comp) { + return comp >= 0.0f && comp <= 1.0f; +} + +CPWL_Color ConvertCMYK2GRAY(FX_FLOAT dC, + FX_FLOAT dM, + FX_FLOAT dY, + FX_FLOAT dK) { + if (!InRange(dC) || !InRange(dM) || !InRange(dY) || !InRange(dK)) + return CPWL_Color(COLORTYPE_GRAY); + return CPWL_Color( + COLORTYPE_GRAY, + 1.0f - std::min(1.0f, 0.3f * dC + 0.59f * dM + 0.11f * dY + dK)); +} + +CPWL_Color ConvertGRAY2CMYK(FX_FLOAT dGray) { + if (!InRange(dGray)) + return CPWL_Color(COLORTYPE_CMYK); + return CPWL_Color(COLORTYPE_CMYK, 0.0f, 0.0f, 0.0f, 1.0f - dGray); +} + +CPWL_Color ConvertGRAY2RGB(FX_FLOAT dGray) { + if (!InRange(dGray)) + return CPWL_Color(COLORTYPE_RGB); + return CPWL_Color(COLORTYPE_RGB, dGray, dGray, dGray); +} + +CPWL_Color ConvertRGB2GRAY(FX_FLOAT dR, FX_FLOAT dG, FX_FLOAT dB) { + if (!InRange(dR) || !InRange(dG) || !InRange(dB)) + return CPWL_Color(COLORTYPE_GRAY); + return CPWL_Color(COLORTYPE_GRAY, 0.3f * dR + 0.59f * dG + 0.11f * dB); +} + +CPWL_Color ConvertCMYK2RGB(FX_FLOAT dC, FX_FLOAT dM, FX_FLOAT dY, FX_FLOAT dK) { + if (!InRange(dC) || !InRange(dM) || !InRange(dY) || !InRange(dK)) + return CPWL_Color(COLORTYPE_RGB); + return CPWL_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)); +} + +CPWL_Color ConvertRGB2CMYK(FX_FLOAT dR, FX_FLOAT dG, FX_FLOAT dB) { + if (!InRange(dR) || !InRange(dG) || !InRange(dB)) + return CPWL_Color(COLORTYPE_CMYK); + + FX_FLOAT c = 1.0f - dR; + FX_FLOAT m = 1.0f - dG; + FX_FLOAT y = 1.0f - dB; + return CPWL_Color(COLORTYPE_CMYK, c, m, y, std::min(c, std::min(m, y))); +} + +} // namespace + +CPWL_Color CPWL_Color::ConvertColorType(int32_t nConvertColorType) const { + if (nColorType == nConvertColorType) + return *this; + + CPWL_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 CPWL_Color::ToFXColor(int32_t nTransparency) const { + CPWL_Color ret; + switch (nColorType) { + case COLORTYPE_TRANSPARENT: { + ret = CPWL_Color(COLORTYPE_TRANSPARENT, 0, 0, 0, 0); + break; + } + case COLORTYPE_GRAY: { + ret = ConvertGRAY2RGB(fColor1); + ret.fColor4 = nTransparency; + break; + } + case COLORTYPE_RGB: { + ret = CPWL_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)); +} + +CPWL_Color CPWL_Color::operator-(FX_FLOAT fColorSub) const { + CPWL_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; +} + +CPWL_Color CPWL_Color::operator/(FX_FLOAT fColorDivide) const { + CPWL_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; +} |