components/favicon/core/fallback_icon_service.h

   1 // Copyright 2015 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 #ifndef COMPONENTS_FAVICON_CORE_FALLBACK_ICON_SERVICE_H_
   6 #define COMPONENTS_FAVICON_CORE_FALLBACK_ICON_SERVICE_H_
   7
   8 #include <vector>
   9
  10 #include "base/macros.h"
  11 #include "components/keyed_service/core/keyed_service.h"
  12
  13 class GURL;
  14
  15 namespace gfx {
  16 class Canvas;
  17 }
  18
  19 namespace favicon_base {
  20 struct FallbackIconStyle;
  21 }
  22
  23 namespace favicon {
  24
  25 class FallbackIconClient;
  26
  27 // A service to provide methods to render fallback favicons.
  28 class FallbackIconService : public KeyedService {
  29  public:
  30   explicit FallbackIconService(FallbackIconClient* fallback_icon_client);
  31   ~FallbackIconService() override;
  32
  33   // Renders a fallback icon synchronously and returns the bitmap. Returns an
  34   // empty std::vector on failure. |size| is icon width and height in pixels.
  35   std::vector<unsigned char> RenderFallbackIconBitmap(
  36       const GURL& icon_url,
  37       int size,
  38       const favicon_base::FallbackIconStyle& style);
  39
  40  private:
  41   // Renders a fallback icon on |canvas| at position (|x|, |y|). |size| is icon
  42   // width and height in pixels.
  43   void DrawFallbackIcon(const GURL& icon_url,
  44                         int size,
  45                         const favicon_base::FallbackIconStyle& style,
  46                         gfx::Canvas* canvas);
  47
  48   FallbackIconClient* fallback_icon_client_;
  49
  50   DISALLOW_COPY_AND_ASSIGN(FallbackIconService);
  51 };
  52
  53 }  // namespace favicon
  54
  55 #endif  // COMPONENTS_FAVICON_CORE_FALLBACK_ICON_SERVICE_H_