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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/web_contents/aura/shadow_layer_delegate.h"
#include "base/bind.h"
#include "base/macros.h"
#include "third_party/skia/include/effects/SkGradientShader.h"
#include "ui/aura/window.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/paint_recorder.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/skia_util.h"
namespace {
const SkColor kShadowLightColor = SkColorSetARGB(0x0, 0, 0, 0);
const SkColor kShadowDarkColor = SkColorSetARGB(0x70, 0, 0, 0);
const int kShadowThick = 7;
} // namespace
namespace content {
ShadowLayerDelegate::ShadowLayerDelegate(ui::Layer* shadow_for)
: layer_(new ui::Layer(ui::LAYER_TEXTURED)) {
layer_->set_delegate(this);
layer_->SetBounds(gfx::Rect(-kShadowThick, 0, kShadowThick,
shadow_for->bounds().height()));
layer_->SetFillsBoundsOpaquely(false);
shadow_for->Add(layer_.get());
}
ShadowLayerDelegate::~ShadowLayerDelegate() {
}
void ShadowLayerDelegate::OnPaintLayer(const ui::PaintContext& context) {
SkPoint points[2];
const SkColor kShadowColors[2] = { kShadowLightColor, kShadowDarkColor };
points[0].iset(0, 0);
points[1].iset(kShadowThick, 0);
gfx::Rect paint_rect = gfx::Rect(0, 0, kShadowThick,
layer_->bounds().height());
SkPaint paint;
paint.setShader(SkGradientShader::MakeLinear(points, kShadowColors, NULL,
arraysize(points),
SkShader::kRepeat_TileMode));
ui::PaintRecorder recorder(context, layer_->size());
recorder.canvas()->DrawRect(paint_rect, paint);
}
void ShadowLayerDelegate::OnDelegatedFrameDamage(
const gfx::Rect& damage_rect_in_dip) {
}
void ShadowLayerDelegate::OnDeviceScaleFactorChanged(float scale_factor) {
}
base::Closure ShadowLayerDelegate::PrepareForLayerBoundsChange() {
return base::Bind(&base::DoNothing);
}
} // namespace content
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