1 // Copyright 2016 The PDFium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7 #include "xfa/fgas/graphics/cfgas_geshading.h"
8
CFGAS_GEShading(const CFX_PointF & beginPoint,const CFX_PointF & endPoint,bool isExtendedBegin,bool isExtendedEnd,FX_ARGB beginArgb,FX_ARGB endArgb)9 CFGAS_GEShading::CFGAS_GEShading(const CFX_PointF& beginPoint,
10 const CFX_PointF& endPoint,
11 bool isExtendedBegin,
12 bool isExtendedEnd,
13 FX_ARGB beginArgb,
14 FX_ARGB endArgb)
15 : m_type(Type::kAxial),
16 m_beginPoint(beginPoint),
17 m_endPoint(endPoint),
18 m_beginRadius(0),
19 m_endRadius(0),
20 m_isExtendedBegin(isExtendedBegin),
21 m_isExtendedEnd(isExtendedEnd) {
22 InitArgbArray(beginArgb, endArgb);
23 }
24
CFGAS_GEShading(const CFX_PointF & beginPoint,const CFX_PointF & endPoint,float beginRadius,float endRadius,bool isExtendedBegin,bool isExtendedEnd,FX_ARGB beginArgb,FX_ARGB endArgb)25 CFGAS_GEShading::CFGAS_GEShading(const CFX_PointF& beginPoint,
26 const CFX_PointF& endPoint,
27 float beginRadius,
28 float endRadius,
29 bool isExtendedBegin,
30 bool isExtendedEnd,
31 FX_ARGB beginArgb,
32 FX_ARGB endArgb)
33 : m_type(Type::kRadial),
34 m_beginPoint(beginPoint),
35 m_endPoint(endPoint),
36 m_beginRadius(beginRadius),
37 m_endRadius(endRadius),
38 m_isExtendedBegin(isExtendedBegin),
39 m_isExtendedEnd(isExtendedEnd) {
40 InitArgbArray(beginArgb, endArgb);
41 }
42
43 CFGAS_GEShading::~CFGAS_GEShading() = default;
44
InitArgbArray(FX_ARGB begin_argb,FX_ARGB end_argb)45 void CFGAS_GEShading::InitArgbArray(FX_ARGB begin_argb, FX_ARGB end_argb) {
46 FX_BGRA_STRUCT<uint8_t> bgra0 = ArgbToBGRAStruct(begin_argb);
47 FX_BGRA_STRUCT<uint8_t> bgra1 = ArgbToBGRAStruct(end_argb);
48
49 constexpr float f = static_cast<float>(kSteps - 1);
50 const float a_scale = 1.0 * (bgra1.alpha - bgra0.alpha) / f;
51 const float r_scale = 1.0 * (bgra1.red - bgra0.red) / f;
52 const float g_scale = 1.0 * (bgra1.green - bgra0.green) / f;
53 const float b_scale = 1.0 * (bgra1.blue - bgra0.blue) / f;
54
55 for (size_t i = 0; i < kSteps; i++) {
56 m_argbArray[i] = ArgbEncode(static_cast<int32_t>(i * a_scale) + bgra0.alpha,
57 static_cast<int32_t>(i * r_scale) + bgra0.red,
58 static_cast<int32_t>(i * g_scale) + bgra0.green,
59 static_cast<int32_t>(i * b_scale) + bgra0.blue);
60 }
61 }
62