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Diffstat (limited to 'chromium/third_party/blink/renderer/platform/graphics/filters/fe_component_transfer.h')
-rw-r--r-- | chromium/third_party/blink/renderer/platform/graphics/filters/fe_component_transfer.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/chromium/third_party/blink/renderer/platform/graphics/filters/fe_component_transfer.h b/chromium/third_party/blink/renderer/platform/graphics/filters/fe_component_transfer.h new file mode 100644 index 00000000000..278fe470ce3 --- /dev/null +++ b/chromium/third_party/blink/renderer/platform/graphics/filters/fe_component_transfer.h @@ -0,0 +1,96 @@ +/* + * 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_ |