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/*
* Copyright (C) 2013 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "third_party/blink/renderer/platform/graphics/draw_looper_builder.h"
#include <memory>
#include "base/memory/scoped_refptr.h"
#include "cc/paint/draw_looper.h"
#include "third_party/blink/renderer/platform/graphics/color.h"
#include "third_party/blink/renderer/platform/graphics/skia/skia_utils.h"
#include "third_party/skia/include/core/SkColor.h"
#include "third_party/skia/include/core/SkColorFilter.h"
#include "third_party/skia/include/core/SkPaint.h"
#include "ui/gfx/geometry/size_f.h"
#include "ui/gfx/geometry/vector2d_f.h"
namespace blink {
DrawLooperBuilder::DrawLooperBuilder() = default;
DrawLooperBuilder::~DrawLooperBuilder() = default;
sk_sp<cc::DrawLooper> DrawLooperBuilder::DetachDrawLooper() {
return draw_looper_builder_.Detach();
}
void DrawLooperBuilder::AddUnmodifiedContent() {
draw_looper_builder_.AddUnmodifiedContent(/*add_on_top=*/true);
}
void DrawLooperBuilder::AddShadow(const gfx::Vector2dF& offset,
float blur,
const Color& color,
ShadowTransformMode shadow_transform_mode,
ShadowAlphaMode shadow_alpha_mode) {
DCHECK_GE(blur, 0);
// Detect when there's no effective shadow.
if (color.IsFullyTransparent()) {
return;
}
uint32_t flags = 0;
if (shadow_alpha_mode == kShadowIgnoresAlpha) {
flags |= cc::DrawLooper::kOverrideAlphaFlag;
}
if (shadow_transform_mode == kShadowIgnoresTransforms) {
flags |= cc::DrawLooper::kPostTransformFlag;
}
draw_looper_builder_.AddShadow({offset.x(), offset.y()},
BlurRadiusToStdDev(blur), color.toSkColor4f(),
flags,
/*add_on_top=*/true);
}
} // namespace blink
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