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 beginArgb,FX_ARGB endArgb)45 void CFGAS_GEShading::InitArgbArray(FX_ARGB beginArgb, FX_ARGB endArgb) {
46 int32_t a1;
47 int32_t r1;
48 int32_t g1;
49 int32_t b1;
50 std::tie(a1, r1, g1, b1) = ArgbDecode(beginArgb);
51
52 int32_t a2;
53 int32_t r2;
54 int32_t g2;
55 int32_t b2;
56 std::tie(a2, r2, g2, b2) = ArgbDecode(endArgb);
57
58 float f = static_cast<float>(kSteps - 1);
59 float aScale = 1.0 * (a2 - a1) / f;
60 float rScale = 1.0 * (r2 - r1) / f;
61 float gScale = 1.0 * (g2 - g1) / f;
62 float bScale = 1.0 * (b2 - b1) / f;
63
64 for (size_t i = 0; i < kSteps; i++) {
65 int32_t a3 = static_cast<int32_t>(i * aScale);
66 int32_t r3 = static_cast<int32_t>(i * rScale);
67 int32_t g3 = static_cast<int32_t>(i * gScale);
68 int32_t b3 = static_cast<int32_t>(i * bScale);
69
70 // TODO(dsinclair): Add overloads for FX_ARGB. pdfium:437
71 m_argbArray[i] = ArgbEncode(a1 + a3, r1 + r3, g1 + g3, b1 + b3);
72 }
73 }
74