1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "content/browser/web_contents/aura/shadow_layer_delegate.h" 6 7 #include "base/bind.h" 8 #include "third_party/skia/include/effects/SkGradientShader.h" 9 #include "ui/aura/window.h" 10 #include "ui/compositor/layer.h" 11 #include "ui/gfx/canvas.h" 12 #include "ui/gfx/skia_util.h" 13 14 namespace { 15 16 const SkColor kShadowLightColor = SkColorSetARGB(0x0, 0, 0, 0); 17 const SkColor kShadowDarkColor = SkColorSetARGB(0x70, 0, 0, 0); 18 const int kShadowThick = 7; 19 20 } // namespace 21 22 namespace content { 23 24 ShadowLayerDelegate::ShadowLayerDelegate(ui::Layer* shadow_for) 25 : layer_(new ui::Layer(ui::LAYER_TEXTURED)) { 26 layer_->set_delegate(this); 27 layer_->SetBounds(gfx::Rect(-kShadowThick, 0, kShadowThick, 28 shadow_for->bounds().height())); 29 layer_->SetFillsBoundsOpaquely(false); 30 shadow_for->Add(layer_.get()); 31 } 32 33 ShadowLayerDelegate::~ShadowLayerDelegate() { 34 } 35 36 void ShadowLayerDelegate::OnPaintLayer(gfx::Canvas* canvas) { 37 SkPoint points[2]; 38 const SkColor kShadowColors[2] = { kShadowLightColor, kShadowDarkColor }; 39 40 points[0].iset(0, 0); 41 points[1].iset(kShadowThick, 0); 42 43 skia::RefPtr<SkShader> shader = skia::AdoptRef( 44 SkGradientShader::CreateLinear(points, kShadowColors, NULL, 45 arraysize(points), SkShader::kRepeat_TileMode, NULL)); 46 47 gfx::Rect paint_rect = gfx::Rect(0, 0, kShadowThick, 48 layer_->bounds().height()); 49 SkPaint paint; 50 paint.setShader(shader.get()); 51 canvas->sk_canvas()->drawRect(gfx::RectToSkRect(paint_rect), paint); 52 } 53 54 void ShadowLayerDelegate::OnDeviceScaleFactorChanged(float scale_factor) { 55 } 56 57 base::Closure ShadowLayerDelegate::PrepareForLayerBoundsChange() { 58 return base::Bind(&base::DoNothing); 59 } 60 61 } // namespace content 62
