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| 1 // Copyright 2016 PDFium Authors. All rights reserved. |
| 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/fxgraphics/cfx_shading.h" |
| 8 |
| 9 CFX_Shading::CFX_Shading(const CFX_PointF& beginPoint, |
| 10 const CFX_PointF& endPoint, |
| 11 FX_BOOL isExtendedBegin, |
| 12 FX_BOOL isExtendedEnd, |
| 13 const FX_ARGB beginArgb, |
| 14 const FX_ARGB endArgb) |
| 15 : m_type(FX_SHADING_Axial), |
| 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 m_beginArgb(beginArgb), |
| 23 m_endArgb(endArgb) { |
| 24 InitArgbArray(); |
| 25 } |
| 26 |
| 27 CFX_Shading::CFX_Shading(const CFX_PointF& beginPoint, |
| 28 const CFX_PointF& endPoint, |
| 29 const FX_FLOAT beginRadius, |
| 30 const FX_FLOAT endRadius, |
| 31 FX_BOOL isExtendedBegin, |
| 32 FX_BOOL isExtendedEnd, |
| 33 const FX_ARGB beginArgb, |
| 34 const FX_ARGB endArgb) |
| 35 : m_type(FX_SHADING_Radial), |
| 36 m_beginPoint(beginPoint), |
| 37 m_endPoint(endPoint), |
| 38 m_beginRadius(beginRadius), |
| 39 m_endRadius(endRadius), |
| 40 m_isExtendedBegin(isExtendedBegin), |
| 41 m_isExtendedEnd(isExtendedEnd), |
| 42 m_beginArgb(beginArgb), |
| 43 m_endArgb(endArgb) { |
| 44 InitArgbArray(); |
| 45 } |
| 46 |
| 47 CFX_Shading::~CFX_Shading() {} |
| 48 |
| 49 void CFX_Shading::InitArgbArray() { |
| 50 int32_t a1; |
| 51 int32_t r1; |
| 52 int32_t g1; |
| 53 int32_t b1; |
| 54 ArgbDecode(m_beginArgb, a1, r1, g1, b1); |
| 55 |
| 56 int32_t a2; |
| 57 int32_t r2; |
| 58 int32_t g2; |
| 59 int32_t b2; |
| 60 ArgbDecode(m_endArgb, a2, r2, g2, b2); |
| 61 |
| 62 FX_FLOAT f = (FX_FLOAT)(FX_SHADING_Steps - 1); |
| 63 FX_FLOAT aScale = 1.0 * (a2 - a1) / f; |
| 64 FX_FLOAT rScale = 1.0 * (r2 - r1) / f; |
| 65 FX_FLOAT gScale = 1.0 * (g2 - g1) / f; |
| 66 FX_FLOAT bScale = 1.0 * (b2 - b1) / f; |
| 67 |
| 68 for (int32_t i = 0; i < FX_SHADING_Steps; i++) { |
| 69 int32_t a3 = static_cast<int32_t>(i * aScale); |
| 70 int32_t r3 = static_cast<int32_t>(i * rScale); |
| 71 int32_t g3 = static_cast<int32_t>(i * gScale); |
| 72 int32_t b3 = static_cast<int32_t>(i * bScale); |
| 73 |
| 74 // TODO(dsinclair): Add overloads for FX_ARGB. pdfium:437 |
| 75 m_argbArray[i] = |
| 76 FXARGB_TODIB(FXARGB_MAKE(a1 + a3, r1 + r3, g1 + g3, b1 + b3)); |
| 77 } |
| 78 } |
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