1// Copyright 2014 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 "base/logging.h" 6#include "chrome/browser/android/thumbnail/thumbnail.h" 7#include "content/public/browser/android/ui_resource_provider.h" 8#include "third_party/skia/include/core/SkBitmap.h" 9#include "third_party/skia/include/core/SkCanvas.h" 10#include "ui/gfx/geometry/size_conversions.h" 11 12namespace { 13 14SkBitmap CreateSmallHolderBitmap() { 15 SkBitmap small_bitmap; 16 SkCanvas canvas(small_bitmap); 17 small_bitmap.allocPixels( 18 SkImageInfo::Make(1, 1, kRGBA_8888_SkColorType, kOpaque_SkAlphaType)); 19 canvas.drawColor(SK_ColorWHITE); 20 small_bitmap.setImmutable(); 21 return small_bitmap; 22} 23 24} // anonymous namespace 25 26scoped_ptr<Thumbnail> Thumbnail::Create( 27 TabId tab_id, 28 const base::Time& time_stamp, 29 float scale, 30 content::UIResourceProvider* ui_resource_provider, 31 ThumbnailDelegate* thumbnail_delegate) { 32 return make_scoped_ptr(new Thumbnail( 33 tab_id, time_stamp, scale, ui_resource_provider, thumbnail_delegate)); 34} 35 36Thumbnail::Thumbnail(TabId tab_id, 37 const base::Time& time_stamp, 38 float scale, 39 content::UIResourceProvider* ui_resource_provider, 40 ThumbnailDelegate* thumbnail_delegate) 41 : tab_id_(tab_id), 42 time_stamp_(time_stamp), 43 scale_(scale), 44 bitmap_(gfx::Size(1, 1), true), 45 ui_resource_id_(0), 46 retrieved_(false), 47 ui_resource_provider_(ui_resource_provider), 48 thumbnail_delegate_(thumbnail_delegate) { 49} 50 51Thumbnail::~Thumbnail() { 52 ClearUIResourceId(); 53} 54 55void Thumbnail::SetBitmap(const SkBitmap& bitmap) { 56 DCHECK(!bitmap.empty()); 57 ClearUIResourceId(); 58 scaled_content_size_ = 59 gfx::ScaleSize(gfx::Size(bitmap.width(), bitmap.height()), 1.f / scale_); 60 scaled_data_size_ = scaled_content_size_; 61 bitmap_ = cc::UIResourceBitmap(bitmap); 62} 63 64void Thumbnail::SetCompressedBitmap(skia::RefPtr<SkPixelRef> compressed_bitmap, 65 const gfx::Size& content_size) { 66 DCHECK(compressed_bitmap); 67 DCHECK(!content_size.IsEmpty()); 68 ClearUIResourceId(); 69 gfx::Size data_size(compressed_bitmap->info().width(), 70 compressed_bitmap->info().height()); 71 scaled_content_size_ = gfx::ScaleSize(content_size, 1.f / scale_); 72 scaled_data_size_ = gfx::ScaleSize(data_size, 1.f / scale_); 73 bitmap_ = cc::UIResourceBitmap(compressed_bitmap, data_size); 74} 75 76void Thumbnail::CreateUIResource() { 77 DCHECK(ui_resource_provider_); 78 if (!ui_resource_id_) 79 ui_resource_id_ = ui_resource_provider_->CreateUIResource(this); 80} 81 82cc::UIResourceBitmap Thumbnail::GetBitmap(cc::UIResourceId uid, 83 bool resource_lost) { 84 if (retrieved_) 85 return bitmap_; 86 87 retrieved_ = true; 88 89 cc::UIResourceBitmap old_bitmap(bitmap_); 90 // Return a place holder for all other calls to GetBitmap. 91 bitmap_ = cc::UIResourceBitmap(CreateSmallHolderBitmap()); 92 return old_bitmap; 93} 94 95void Thumbnail::UIResourceIsInvalid() { 96 ui_resource_id_ = 0; 97 if (thumbnail_delegate_) 98 thumbnail_delegate_->InvalidateCachedThumbnail(this); 99} 100 101void Thumbnail::ClearUIResourceId() { 102 if (ui_resource_id_ && ui_resource_provider_) 103 ui_resource_provider_->DeleteUIResource(ui_resource_id_); 104 ui_resource_id_ = 0; 105} 106