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/*
* Copyright (C) 2009 Dirk Schulze <krit@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.
*/
#include "third_party/blink/renderer/platform/graphics/filters/source_alpha.h"
#include "third_party/blink/renderer/platform/graphics/filters/filter.h"
#include "third_party/blink/renderer/platform/graphics/filters/paint_filter_builder.h"
#include "third_party/blink/renderer/platform/wtf/text/text_stream.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/skia/include/effects/SkColorFilterImageFilter.h"
#include "third_party/skia/include/effects/SkColorMatrixFilter.h"
namespace blink {
SourceAlpha* SourceAlpha::Create(FilterEffect* source_effect) {
return MakeGarbageCollected<SourceAlpha>(source_effect);
}
SourceAlpha::SourceAlpha(FilterEffect* source_effect)
: FilterEffect(source_effect->GetFilter()) {
SetOperatingInterpolationSpace(source_effect->OperatingInterpolationSpace());
InputEffects().push_back(source_effect);
}
sk_sp<PaintFilter> SourceAlpha::CreateImageFilter() {
sk_sp<PaintFilter> source_graphic(paint_filter_builder::Build(
InputEffect(0), OperatingInterpolationSpace()));
SkScalar matrix[20] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, SK_Scalar1, 0};
sk_sp<SkColorFilter> color_filter =
SkColorFilter::MakeMatrixFilterRowMajor255(matrix);
return sk_make_sp<ColorFilterPaintFilter>(std::move(color_filter),
std::move(source_graphic));
}
WTF::TextStream& SourceAlpha::ExternalRepresentation(WTF::TextStream& ts,
int indent) const {
WriteIndent(ts, indent);
ts << "[SourceAlpha]\n";
return ts;
}
} // namespace blink
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