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+/*
+ * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
+ * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
+ * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
+ * Copyright (C) 2013 Google Inc. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_FILTERS_FE_COMPONENT_TRANSFER_H_
+#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_FILTERS_FE_COMPONENT_TRANSFER_H_
+
+#include "third_party/blink/renderer/platform/graphics/filters/filter_effect.h"
+#include "third_party/blink/renderer/platform/wtf/vector.h"
+
+namespace blink {
+
+enum ComponentTransferType {
+ FECOMPONENTTRANSFER_TYPE_UNKNOWN = 0,
+ FECOMPONENTTRANSFER_TYPE_IDENTITY = 1,
+ FECOMPONENTTRANSFER_TYPE_TABLE = 2,
+ FECOMPONENTTRANSFER_TYPE_DISCRETE = 3,
+ FECOMPONENTTRANSFER_TYPE_LINEAR = 4,
+ FECOMPONENTTRANSFER_TYPE_GAMMA = 5
+};
+
+struct ComponentTransferFunction {
+ DISALLOW_NEW();
+ ComponentTransferFunction()
+ : type(FECOMPONENTTRANSFER_TYPE_UNKNOWN),
+ slope(0),
+ intercept(0),
+ amplitude(0),
+ exponent(0),
+ offset(0) {}
+
+ ComponentTransferType type;
+
+ float slope;
+ float intercept;
+ float amplitude;
+ float exponent;
+ float offset;
+
+ Vector<float> table_values;
+};
+
+class PLATFORM_EXPORT FEComponentTransfer final : public FilterEffect {
+ public:
+ static FEComponentTransfer* Create(
+ Filter*,
+ const ComponentTransferFunction& red_func,
+ const ComponentTransferFunction& green_func,
+ const ComponentTransferFunction& blue_func,
+ const ComponentTransferFunction& alpha_func);
+
+ TextStream& ExternalRepresentation(TextStream&, int indention) const override;
+
+ private:
+ FEComponentTransfer(Filter*,
+ const ComponentTransferFunction& red_func,
+ const ComponentTransferFunction& green_func,
+ const ComponentTransferFunction& blue_func,
+ const ComponentTransferFunction& alpha_func);
+
+ sk_sp<PaintFilter> CreateImageFilter() override;
+
+ bool AffectsTransparentPixels() const override;
+
+ void GetValues(unsigned char r_values[256],
+ unsigned char g_values[256],
+ unsigned char b_values[256],
+ unsigned char a_values[256]);
+
+ ComponentTransferFunction red_func_;
+ ComponentTransferFunction green_func_;
+ ComponentTransferFunction blue_func_;
+ ComponentTransferFunction alpha_func_;
+};
+
+} // namespace blink
+
+#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_GRAPHICS_FILTERS_FE_COMPONENT_TRANSFER_H_