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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/fpdfdoc/cpdf_defaultappearance.h"
#include <algorithm>
#include "core/fpdfapi/parser/cpdf_simple_parser.h"
#include "core/fpdfapi/parser/fpdf_parser_decode.h"
#include "core/fxge/cfx_color.h"
bool CPDF_DefaultAppearance::HasFont() {
if (m_csDA.IsEmpty())
return false;
CPDF_SimpleParser syntax(m_csDA.AsStringView());
return syntax.FindTagParamFromStart("Tf", 2);
}
ByteString CPDF_DefaultAppearance::GetFont(float* fFontSize) {
*fFontSize = 0.0f;
if (m_csDA.IsEmpty())
return ByteString();
ByteString csFontNameTag;
CPDF_SimpleParser syntax(m_csDA.AsStringView());
if (syntax.FindTagParamFromStart("Tf", 2)) {
csFontNameTag = ByteString(syntax.GetWord());
csFontNameTag.Delete(0, 1);
*fFontSize = FX_atof(syntax.GetWord());
}
return PDF_NameDecode(csFontNameTag.AsStringView());
}
bool CPDF_DefaultAppearance::HasColor() {
if (m_csDA.IsEmpty())
return false;
CPDF_SimpleParser syntax(m_csDA.AsStringView());
if (syntax.FindTagParamFromStart("g", 1))
return true;
if (syntax.FindTagParamFromStart("rg", 3))
return true;
return syntax.FindTagParamFromStart("k", 4);
}
void CPDF_DefaultAppearance::GetColor(int& iColorType, float fc[4]) {
iColorType = CFX_Color::kTransparent;
for (int c = 0; c < 4; c++)
fc[c] = 0;
if (m_csDA.IsEmpty())
return;
CPDF_SimpleParser syntax(m_csDA.AsStringView());
if (syntax.FindTagParamFromStart("g", 1)) {
iColorType = CFX_Color::kGray;
fc[0] = FX_atof(syntax.GetWord());
return;
}
if (syntax.FindTagParamFromStart("rg", 3)) {
iColorType = CFX_Color::kRGB;
fc[0] = FX_atof(syntax.GetWord());
fc[1] = FX_atof(syntax.GetWord());
fc[2] = FX_atof(syntax.GetWord());
return;
}
if (syntax.FindTagParamFromStart("k", 4)) {
iColorType = CFX_Color::kCMYK;
fc[0] = FX_atof(syntax.GetWord());
fc[1] = FX_atof(syntax.GetWord());
fc[2] = FX_atof(syntax.GetWord());
fc[3] = FX_atof(syntax.GetWord());
}
}
void CPDF_DefaultAppearance::GetColor(FX_ARGB& color, int& iColorType) {
color = 0;
float values[4];
GetColor(iColorType, values);
if (iColorType == CFX_Color::kTransparent)
return;
if (iColorType == CFX_Color::kGray) {
int g = static_cast<int>(values[0] * 255 + 0.5f);
color = ArgbEncode(255, g, g, g);
return;
}
if (iColorType == CFX_Color::kRGB) {
int r = static_cast<int>(values[0] * 255 + 0.5f);
int g = static_cast<int>(values[1] * 255 + 0.5f);
int b = static_cast<int>(values[2] * 255 + 0.5f);
color = ArgbEncode(255, r, g, b);
return;
}
if (iColorType == CFX_Color::kCMYK) {
float r = 1.0f - std::min(1.0f, values[0] + values[3]);
float g = 1.0f - std::min(1.0f, values[1] + values[3]);
float b = 1.0f - std::min(1.0f, values[2] + values[3]);
color = ArgbEncode(255, static_cast<int>(r * 255 + 0.5f),
static_cast<int>(g * 255 + 0.5f),
static_cast<int>(b * 255 + 0.5f));
}
}
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