Rename CPWL_Color to CFX_Color

This CL moves fpdfsdk/pdfwindow/cpwl_color to core/fxge/cfx_color.

Change-Id: Ia95b7fba2c76a1b9a438014d3598c7aa55bbb2ab
Reviewed-on: https://pdfium-review.googlesource.com/7753
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>

2 files changed, 233 insertions, 0 deletions

diff --git a/core/fxge/cfx_color.cpp b/core/fxge/cfx_color.cpp
new file mode 100644
index 0000000000..eebdd2cf1c
--- /dev/null
+++ b/core/fxge/cfx_color.cpp
@@ -0,0 +1,176 @@
+// Copyright 2017 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 "core/fxge/cfx_color.h"
+
+#include <algorithm>
+
+namespace {
+
+bool InRange(float comp) {
+  return comp >= 0.0f && comp <= 1.0f;
+}
+
+CFX_Color ConvertCMYK2GRAY(float dC, float dM, float dY, float dK) {
+  if (!InRange(dC) || !InRange(dM) || !InRange(dY) || !InRange(dK))
+    return CFX_Color(COLORTYPE_GRAY);
+  return CFX_Color(
+      COLORTYPE_GRAY,
+      1.0f - std::min(1.0f, 0.3f * dC + 0.59f * dM + 0.11f * dY + dK));
+}
+
+CFX_Color ConvertGRAY2CMYK(float dGray) {
+  if (!InRange(dGray))
+    return CFX_Color(COLORTYPE_CMYK);
+  return CFX_Color(COLORTYPE_CMYK, 0.0f, 0.0f, 0.0f, 1.0f - dGray);
+}
+
+CFX_Color ConvertGRAY2RGB(float dGray) {
+  if (!InRange(dGray))
+    return CFX_Color(COLORTYPE_RGB);
+  return CFX_Color(COLORTYPE_RGB, dGray, dGray, dGray);
+}
+
+CFX_Color ConvertRGB2GRAY(float dR, float dG, float dB) {
+  if (!InRange(dR) || !InRange(dG) || !InRange(dB))
+    return CFX_Color(COLORTYPE_GRAY);
+  return CFX_Color(COLORTYPE_GRAY, 0.3f * dR + 0.59f * dG + 0.11f * dB);
+}
+
+CFX_Color ConvertCMYK2RGB(float dC, float dM, float dY, float dK) {
+  if (!InRange(dC) || !InRange(dM) || !InRange(dY) || !InRange(dK))
+    return CFX_Color(COLORTYPE_RGB);
+  return CFX_Color(COLORTYPE_RGB, 1.0f - std::min(1.0f, dC + dK),
+                   1.0f - std::min(1.0f, dM + dK),
+                   1.0f - std::min(1.0f, dY + dK));
+}
+
+CFX_Color ConvertRGB2CMYK(float dR, float dG, float dB) {
+  if (!InRange(dR) || !InRange(dG) || !InRange(dB))
+    return CFX_Color(COLORTYPE_CMYK);
+
+  float c = 1.0f - dR;
+  float m = 1.0f - dG;
+  float y = 1.0f - dB;
+  return CFX_Color(COLORTYPE_CMYK, c, m, y, std::min(c, std::min(m, y)));
+}
+
+}  // namespace
+
+CFX_Color CFX_Color::ConvertColorType(int32_t nConvertColorType) const {
+  if (nColorType == nConvertColorType)
+    return *this;
+
+  CFX_Color ret;
+  switch (nColorType) {
+    case COLORTYPE_TRANSPARENT:
+      ret = *this;
+      ret.nColorType = COLORTYPE_TRANSPARENT;
+      break;
+    case COLORTYPE_GRAY:
+      switch (nConvertColorType) {
+        case COLORTYPE_RGB:
+          ret = ConvertGRAY2RGB(fColor1);
+          break;
+        case COLORTYPE_CMYK:
+          ret = ConvertGRAY2CMYK(fColor1);
+          break;
+      }
+      break;
+    case COLORTYPE_RGB:
+      switch (nConvertColorType) {
+        case COLORTYPE_GRAY:
+          ret = ConvertRGB2GRAY(fColor1, fColor2, fColor3);
+          break;
+        case COLORTYPE_CMYK:
+          ret = ConvertRGB2CMYK(fColor1, fColor2, fColor3);
+          break;
+      }
+      break;
+    case COLORTYPE_CMYK:
+      switch (nConvertColorType) {
+        case COLORTYPE_GRAY:
+          ret = ConvertCMYK2GRAY(fColor1, fColor2, fColor3, fColor4);
+          break;
+        case COLORTYPE_RGB:
+          ret = ConvertCMYK2RGB(fColor1, fColor2, fColor3, fColor4);
+          break;
+      }
+      break;
+  }
+  return ret;
+}
+
+FX_COLORREF CFX_Color::ToFXColor(int32_t nTransparency) const {
+  CFX_Color ret;
+  switch (nColorType) {
+    case COLORTYPE_TRANSPARENT: {
+      ret = CFX_Color(COLORTYPE_TRANSPARENT, 0, 0, 0, 0);
+      break;
+    }
+    case COLORTYPE_GRAY: {
+      ret = ConvertGRAY2RGB(fColor1);
+      ret.fColor4 = nTransparency;
+      break;
+    }
+    case COLORTYPE_RGB: {
+      ret = CFX_Color(COLORTYPE_RGB, fColor1, fColor2, fColor3);
+      ret.fColor4 = nTransparency;
+      break;
+    }
+    case COLORTYPE_CMYK: {
+      ret = ConvertCMYK2RGB(fColor1, fColor2, fColor3, fColor4);
+      ret.fColor4 = nTransparency;
+      break;
+    }
+  }
+  return ArgbEncode(ret.fColor4, static_cast<int32_t>(ret.fColor1 * 255),
+                    static_cast<int32_t>(ret.fColor2 * 255),
+                    static_cast<int32_t>(ret.fColor3 * 255));
+}
+
+CFX_Color CFX_Color::operator-(float fColorSub) const {
+  CFX_Color sRet(nColorType);
+  switch (nColorType) {
+    case COLORTYPE_TRANSPARENT:
+      sRet.nColorType = COLORTYPE_RGB;
+      sRet.fColor1 = std::max(1.0f - fColorSub, 0.0f);
+      sRet.fColor2 = std::max(1.0f - fColorSub, 0.0f);
+      sRet.fColor3 = std::max(1.0f - fColorSub, 0.0f);
+      break;
+    case COLORTYPE_RGB:
+    case COLORTYPE_GRAY:
+    case COLORTYPE_CMYK:
+      sRet.fColor1 = std::max(fColor1 - fColorSub, 0.0f);
+      sRet.fColor2 = std::max(fColor2 - fColorSub, 0.0f);
+      sRet.fColor3 = std::max(fColor3 - fColorSub, 0.0f);
+      sRet.fColor4 = std::max(fColor4 - fColorSub, 0.0f);
+      break;
+  }
+  return sRet;
+}
+
+CFX_Color CFX_Color::operator/(float fColorDivide) const {
+  CFX_Color sRet(nColorType);
+  switch (nColorType) {
+    case COLORTYPE_TRANSPARENT:
+      sRet.nColorType = COLORTYPE_RGB;
+      sRet.fColor1 = 1.0f / fColorDivide;
+      sRet.fColor2 = 1.0f / fColorDivide;
+      sRet.fColor3 = 1.0f / fColorDivide;
+      break;
+    case COLORTYPE_RGB:
+    case COLORTYPE_GRAY:
+    case COLORTYPE_CMYK:
+      sRet = *this;
+      sRet.fColor1 /= fColorDivide;
+      sRet.fColor2 /= fColorDivide;
+      sRet.fColor3 /= fColorDivide;
+      sRet.fColor4 /= fColorDivide;
+      break;
+  }
+  return sRet;
+}
diff --git a/core/fxge/cfx_color.h b/core/fxge/cfx_color.h
new file mode 100644
index 0000000000..b92c0bcc28
--- /dev/null
+++ b/core/fxge/cfx_color.h
@@ -0,0 +1,57 @@
+// Copyright 2017 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
+
+#ifndef CORE_FXGE_CFX_COLOR_H_
+#define CORE_FXGE_CFX_COLOR_H_
+
+#include "core/fpdfdoc/cpdf_formcontrol.h"
+#include "core/fxge/fx_dib.h"
+
+struct CFX_Color {
+  explicit CFX_Color(FX_COLORREF ref)
+      : CFX_Color(FXARGB_R(ref), FXARGB_G(ref), FXARGB_B(ref)) {}
+
+  CFX_Color(int32_t type = COLORTYPE_TRANSPARENT,
+            float color1 = 0.0f,
+            float color2 = 0.0f,
+            float color3 = 0.0f,
+            float color4 = 0.0f)
+      : nColorType(type),
+        fColor1(color1),
+        fColor2(color2),
+        fColor3(color3),
+        fColor4(color4) {}
+
+  CFX_Color(int32_t r, int32_t g, int32_t b)
+      : nColorType(COLORTYPE_RGB),
+        fColor1(r / 255.0f),
+        fColor2(g / 255.0f),
+        fColor3(b / 255.0f),
+        fColor4(0) {}
+
+  CFX_Color operator/(float fColorDivide) const;
+  CFX_Color operator-(float fColorSub) const;
+
+  CFX_Color ConvertColorType(int32_t other_nColorType) const;
+
+  FX_COLORREF ToFXColor(int32_t nTransparency) const;
+
+  void Reset() {
+    nColorType = COLORTYPE_TRANSPARENT;
+    fColor1 = 0.0f;
+    fColor2 = 0.0f;
+    fColor3 = 0.0f;
+    fColor4 = 0.0f;
+  }
+
+  int32_t nColorType;
+  float fColor1;
+  float fColor2;
+  float fColor3;
+  float fColor4;
+};
+
+#endif  // CORE_FXGE_CFX_COLOR_H_