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Diffstat (limited to 'xfa/fxgraphics/cxfa_shading.cpp')
-rw-r--r--xfa/fxgraphics/cxfa_shading.cpp78
1 files changed, 78 insertions, 0 deletions
diff --git a/xfa/fxgraphics/cxfa_shading.cpp b/xfa/fxgraphics/cxfa_shading.cpp
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+++ b/xfa/fxgraphics/cxfa_shading.cpp
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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 "xfa/fxgraphics/cxfa_shading.h"
+
+CXFA_Shading::CXFA_Shading(const CFX_PointF& beginPoint,
+ const CFX_PointF& endPoint,
+ bool isExtendedBegin,
+ bool isExtendedEnd,
+ const FX_ARGB beginArgb,
+ const FX_ARGB endArgb)
+ : m_type(FX_SHADING_Axial),
+ m_beginPoint(beginPoint),
+ m_endPoint(endPoint),
+ m_beginRadius(0),
+ m_endRadius(0),
+ m_isExtendedBegin(isExtendedBegin),
+ m_isExtendedEnd(isExtendedEnd),
+ m_beginArgb(beginArgb),
+ m_endArgb(endArgb) {
+ InitArgbArray();
+}
+
+CXFA_Shading::CXFA_Shading(const CFX_PointF& beginPoint,
+ const CFX_PointF& endPoint,
+ const float beginRadius,
+ const float endRadius,
+ bool isExtendedBegin,
+ bool isExtendedEnd,
+ const FX_ARGB beginArgb,
+ const FX_ARGB endArgb)
+ : m_type(FX_SHADING_Radial),
+ m_beginPoint(beginPoint),
+ m_endPoint(endPoint),
+ m_beginRadius(beginRadius),
+ m_endRadius(endRadius),
+ m_isExtendedBegin(isExtendedBegin),
+ m_isExtendedEnd(isExtendedEnd),
+ m_beginArgb(beginArgb),
+ m_endArgb(endArgb) {
+ InitArgbArray();
+}
+
+CXFA_Shading::~CXFA_Shading() {}
+
+void CXFA_Shading::InitArgbArray() {
+ int32_t a1;
+ int32_t r1;
+ int32_t g1;
+ int32_t b1;
+ std::tie(a1, r1, g1, b1) = ArgbDecode(m_beginArgb);
+
+ int32_t a2;
+ int32_t r2;
+ int32_t g2;
+ int32_t b2;
+ std::tie(a2, r2, g2, b2) = ArgbDecode(m_endArgb);
+
+ float f = static_cast<float>(FX_SHADING_Steps - 1);
+ float aScale = 1.0 * (a2 - a1) / f;
+ float rScale = 1.0 * (r2 - r1) / f;
+ float gScale = 1.0 * (g2 - g1) / f;
+ float bScale = 1.0 * (b2 - b1) / f;
+
+ for (int32_t i = 0; i < FX_SHADING_Steps; i++) {
+ int32_t a3 = static_cast<int32_t>(i * aScale);
+ int32_t r3 = static_cast<int32_t>(i * rScale);
+ int32_t g3 = static_cast<int32_t>(i * gScale);
+ int32_t b3 = static_cast<int32_t>(i * bScale);
+
+ // TODO(dsinclair): Add overloads for FX_ARGB. pdfium:437
+ m_argbArray[i] =
+ FXARGB_TODIB(FXARGB_MAKE(a1 + a3, r1 + r3, g1 + g3, b1 + b3));
+ }
+}