74 lines
2.4 KiB
C++
74 lines
2.4 KiB
C++
// Copyright 2016 The PDFium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "xfa/fgas/graphics/cfgas_geshading.h"
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CFGAS_GEShading::CFGAS_GEShading(const CFX_PointF& beginPoint,
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const CFX_PointF& endPoint,
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bool isExtendedBegin,
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bool isExtendedEnd,
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FX_ARGB beginArgb,
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FX_ARGB endArgb)
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: m_type(Type::kAxial),
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m_beginPoint(beginPoint),
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m_endPoint(endPoint),
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m_beginRadius(0),
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m_endRadius(0),
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m_isExtendedBegin(isExtendedBegin),
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m_isExtendedEnd(isExtendedEnd) {
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InitArgbArray(beginArgb, endArgb);
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}
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CFGAS_GEShading::CFGAS_GEShading(const CFX_PointF& beginPoint,
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const CFX_PointF& endPoint,
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float beginRadius,
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float endRadius,
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bool isExtendedBegin,
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bool isExtendedEnd,
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FX_ARGB beginArgb,
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FX_ARGB endArgb)
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: m_type(Type::kRadial),
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m_beginPoint(beginPoint),
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m_endPoint(endPoint),
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m_beginRadius(beginRadius),
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m_endRadius(endRadius),
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m_isExtendedBegin(isExtendedBegin),
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m_isExtendedEnd(isExtendedEnd) {
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InitArgbArray(beginArgb, endArgb);
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}
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CFGAS_GEShading::~CFGAS_GEShading() = default;
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void CFGAS_GEShading::InitArgbArray(FX_ARGB beginArgb, FX_ARGB endArgb) {
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int32_t a1;
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int32_t r1;
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int32_t g1;
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int32_t b1;
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std::tie(a1, r1, g1, b1) = ArgbDecode(beginArgb);
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int32_t a2;
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int32_t r2;
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int32_t g2;
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int32_t b2;
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std::tie(a2, r2, g2, b2) = ArgbDecode(endArgb);
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float f = static_cast<float>(kSteps - 1);
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float aScale = 1.0 * (a2 - a1) / f;
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float rScale = 1.0 * (r2 - r1) / f;
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float gScale = 1.0 * (g2 - g1) / f;
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float bScale = 1.0 * (b2 - b1) / f;
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for (size_t i = 0; i < kSteps; i++) {
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int32_t a3 = static_cast<int32_t>(i * aScale);
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int32_t r3 = static_cast<int32_t>(i * rScale);
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int32_t g3 = static_cast<int32_t>(i * gScale);
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int32_t b3 = static_cast<int32_t>(i * bScale);
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// TODO(dsinclair): Add overloads for FX_ARGB. pdfium:437
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m_argbArray[i] = ArgbEncode(a1 + a3, r1 + r3, g1 + g3, b1 + b3);
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}
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}
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