Move xfa/include/fxgraphics/fx_graphics.h to xfa/fxgraphics.

This Cl moves and splits apart the fx_graphics.h file into individual classes.
The .cpp files are renamed to match the .h files. pre.h was removed at the
same time and its contents moved to the correct places as needed.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1810563002 .

1 files changed, 78 insertions, 0 deletions

diff --git a/xfa/fxgraphics/cfx_shading.cpp b/xfa/fxgraphics/cfx_shading.cpp
new file mode 100644
index 0000000000..8be8b03e26
--- /dev/null
+++ b/xfa/fxgraphics/cfx_shading.cpp
@@ -0,0 +1,78 @@
+// 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/cfx_shading.h"
+
+CFX_Shading::CFX_Shading(const CFX_PointF& beginPoint,
+                         const CFX_PointF& endPoint,
+                         FX_BOOL isExtendedBegin,
+                         FX_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();
+}
+
+CFX_Shading::CFX_Shading(const CFX_PointF& beginPoint,
+                         const CFX_PointF& endPoint,
+                         const FX_FLOAT beginRadius,
+                         const FX_FLOAT endRadius,
+                         FX_BOOL isExtendedBegin,
+                         FX_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();
+}
+
+CFX_Shading::~CFX_Shading() {}
+
+void CFX_Shading::InitArgbArray() {
+  int32_t a1;
+  int32_t r1;
+  int32_t g1;
+  int32_t b1;
+  ArgbDecode(m_beginArgb, a1, r1, g1, b1);
+
+  int32_t a2;
+  int32_t r2;
+  int32_t g2;
+  int32_t b2;
+  ArgbDecode(m_endArgb, a2, r2, g2, b2);
+
+  FX_FLOAT f = (FX_FLOAT)(FX_SHADING_Steps - 1);
+  FX_FLOAT aScale = 1.0 * (a2 - a1) / f;
+  FX_FLOAT rScale = 1.0 * (r2 - r1) / f;
+  FX_FLOAT gScale = 1.0 * (g2 - g1) / f;
+  FX_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));
+  }
+}