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      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 "chrome/browser/profiles/profile_avatar_icon_util.h"
      6 
      7 #include "base/files/file_util.h"
      8 #include "base/format_macros.h"
      9 #include "base/memory/scoped_ptr.h"
     10 #include "base/path_service.h"
     11 #include "base/strings/string_number_conversions.h"
     12 #include "base/strings/stringprintf.h"
     13 #include "chrome/common/chrome_paths.h"
     14 #include "grit/theme_resources.h"
     15 #include "skia/ext/image_operations.h"
     16 #include "third_party/skia/include/core/SkPaint.h"
     17 #include "third_party/skia/include/core/SkPath.h"
     18 #include "third_party/skia/include/core/SkScalar.h"
     19 #include "third_party/skia/include/core/SkXfermode.h"
     20 #include "ui/gfx/canvas.h"
     21 #include "ui/gfx/image/canvas_image_source.h"
     22 #include "ui/gfx/image/image.h"
     23 #include "ui/gfx/image/image_skia_operations.h"
     24 #include "ui/gfx/rect.h"
     25 #include "ui/gfx/skia_util.h"
     26 
     27 // Helper methods for transforming and drawing avatar icons.
     28 namespace {
     29 
     30 // Determine what the scaled height of the avatar icon should be for a
     31 // specified width, to preserve the aspect ratio.
     32 int GetScaledAvatarHeightForWidth(int width, const gfx::ImageSkia& avatar) {
     33   // Multiply the width by the inverted aspect ratio (height over
     34   // width), and then add 0.5 to ensure the int truncation rounds nicely.
     35   int scaled_height = width *
     36       ((float) avatar.height() / (float) avatar.width()) + 0.5f;
     37   return scaled_height;
     38 }
     39 
     40 // A CanvasImageSource that draws a sized and positioned avatar with an
     41 // optional border independently of the scale factor.
     42 class AvatarImageSource : public gfx::CanvasImageSource {
     43  public:
     44   enum AvatarPosition {
     45     POSITION_CENTER,
     46     POSITION_BOTTOM_CENTER,
     47   };
     48 
     49   enum AvatarBorder {
     50     BORDER_NONE,
     51     BORDER_NORMAL,
     52     BORDER_ETCHED,
     53   };
     54 
     55   AvatarImageSource(gfx::ImageSkia avatar,
     56                     const gfx::Size& canvas_size,
     57                     int width,
     58                     AvatarPosition position,
     59                     AvatarBorder border);
     60   virtual ~AvatarImageSource();
     61 
     62   // CanvasImageSource override:
     63   virtual void Draw(gfx::Canvas* canvas) OVERRIDE;
     64 
     65  private:
     66   gfx::ImageSkia avatar_;
     67   const gfx::Size canvas_size_;
     68   const int width_;
     69   const int height_;
     70   const AvatarPosition position_;
     71   const AvatarBorder border_;
     72 
     73   DISALLOW_COPY_AND_ASSIGN(AvatarImageSource);
     74 };
     75 
     76 AvatarImageSource::AvatarImageSource(gfx::ImageSkia avatar,
     77                                      const gfx::Size& canvas_size,
     78                                      int width,
     79                                      AvatarPosition position,
     80                                      AvatarBorder border)
     81     : gfx::CanvasImageSource(canvas_size, false),
     82       canvas_size_(canvas_size),
     83       width_(width),
     84       height_(GetScaledAvatarHeightForWidth(width, avatar)),
     85       position_(position),
     86       border_(border) {
     87   avatar_ = gfx::ImageSkiaOperations::CreateResizedImage(
     88       avatar, skia::ImageOperations::RESIZE_BEST,
     89       gfx::Size(width_, height_));
     90 }
     91 
     92 AvatarImageSource::~AvatarImageSource() {
     93 }
     94 
     95 void AvatarImageSource::Draw(gfx::Canvas* canvas) {
     96   // Center the avatar horizontally.
     97   int x = (canvas_size_.width() - width_) / 2;
     98   int y;
     99 
    100   if (position_ == POSITION_CENTER) {
    101     // Draw the avatar centered on the canvas.
    102     y = (canvas_size_.height() - height_) / 2;
    103   } else {
    104     // Draw the avatar on the bottom center of the canvas, leaving 1px below.
    105     y = canvas_size_.height() - height_ - 1;
    106   }
    107 
    108   canvas->DrawImageInt(avatar_, x, y);
    109 
    110   // The border should be square.
    111   int border_size = std::max(width_, height_);
    112   // Reset the x and y for the square border.
    113   x = (canvas_size_.width() - border_size) / 2;
    114   y = (canvas_size_.height() - border_size) / 2;
    115 
    116   if (border_ == BORDER_NORMAL) {
    117     // Draw a gray border on the inside of the avatar.
    118     SkColor border_color = SkColorSetARGB(83, 0, 0, 0);
    119 
    120     // Offset the rectangle by a half pixel so the border is drawn within the
    121     // appropriate pixels no matter the scale factor. Subtract 1 from the right
    122     // and bottom sizes to specify the endpoints, yielding -0.5.
    123     SkPath path;
    124     path.addRect(SkFloatToScalar(x + 0.5f),  // left
    125                  SkFloatToScalar(y + 0.5f),  // top
    126                  SkFloatToScalar(x + border_size - 0.5f),   // right
    127                  SkFloatToScalar(y + border_size - 0.5f));  // bottom
    128 
    129     SkPaint paint;
    130     paint.setColor(border_color);
    131     paint.setStyle(SkPaint::kStroke_Style);
    132     paint.setStrokeWidth(SkIntToScalar(1));
    133 
    134     canvas->DrawPath(path, paint);
    135   } else if (border_ == BORDER_ETCHED) {
    136     // Give the avatar an etched look by drawing a highlight on the bottom and
    137     // right edges.
    138     SkColor shadow_color = SkColorSetARGB(83, 0, 0, 0);
    139     SkColor highlight_color = SkColorSetARGB(96, 255, 255, 255);
    140 
    141     SkPaint paint;
    142     paint.setStyle(SkPaint::kStroke_Style);
    143     paint.setStrokeWidth(SkIntToScalar(1));
    144 
    145     SkPath path;
    146 
    147     // Left and top shadows. To support higher scale factors than 1, position
    148     // the orthogonal dimension of each line on the half-pixel to separate the
    149     // pixel. For a vertical line, this means adding 0.5 to the x-value.
    150     path.moveTo(SkFloatToScalar(x + 0.5f), SkIntToScalar(y + height_));
    151 
    152     // Draw up to the top-left. Stop with the y-value at a half-pixel.
    153     path.rLineTo(SkIntToScalar(0), SkFloatToScalar(-height_ + 0.5f));
    154 
    155     // Draw right to the top-right, stopping within the last pixel.
    156     path.rLineTo(SkFloatToScalar(width_ - 0.5f), SkIntToScalar(0));
    157 
    158     paint.setColor(shadow_color);
    159     canvas->DrawPath(path, paint);
    160 
    161     path.reset();
    162 
    163     // Bottom and right highlights. Note that the shadows own the shared corner
    164     // pixels, so reduce the sizes accordingly.
    165     path.moveTo(SkIntToScalar(x + 1), SkFloatToScalar(y + height_ - 0.5f));
    166 
    167     // Draw right to the bottom-right.
    168     path.rLineTo(SkFloatToScalar(width_ - 1.5f), SkIntToScalar(0));
    169 
    170     // Draw up to the top-right.
    171     path.rLineTo(SkIntToScalar(0), SkFloatToScalar(-height_ + 1.5f));
    172 
    173     paint.setColor(highlight_color);
    174     canvas->DrawPath(path, paint);
    175   }
    176 }
    177 
    178 }  // namespace
    179 
    180 namespace profiles {
    181 
    182 struct IconResourceInfo {
    183   int resource_id;
    184   const char* filename;
    185 };
    186 
    187 const int kAvatarIconWidth = 38;
    188 const int kAvatarIconHeight = 31;
    189 const SkColor kAvatarTutorialBackgroundColor = SkColorSetRGB(0x42, 0x85, 0xf4);
    190 const SkColor kAvatarTutorialContentTextColor = SkColorSetRGB(0xc6, 0xda, 0xfc);
    191 const SkColor kAvatarBubbleAccountsBackgroundColor =
    192     SkColorSetRGB(0xf3, 0xf3, 0xf3);
    193 
    194 const char kDefaultUrlPrefix[] = "chrome://theme/IDR_PROFILE_AVATAR_";
    195 const char kGAIAPictureFileName[] = "Google Profile Picture.png";
    196 const char kHighResAvatarFolderName[] = "Avatars";
    197 
    198 // This avatar does not exist on the server, the high res copy is in the build.
    199 const char kNoHighResAvatar[] = "NothingToDownload";
    200 
    201 // The size of the function-static kDefaultAvatarIconResources array below.
    202 const size_t kDefaultAvatarIconsCount = 27;
    203 
    204 // The first 8 icons are generic.
    205 const size_t kGenericAvatarIconsCount = 8;
    206 
    207 // The avatar used as a placeholder (grey silhouette).
    208 const int kPlaceholderAvatarIcon = 26;
    209 
    210 gfx::Image GetSizedAvatarIcon(const gfx::Image& image,
    211                               bool is_rectangle,
    212                               int width, int height) {
    213   if (!is_rectangle && image.Height() <= height)
    214     return image;
    215 
    216   gfx::Size size(width, height);
    217 
    218   // Source for a centered, sized icon. GAIA images get a border.
    219   scoped_ptr<gfx::ImageSkiaSource> source(
    220       new AvatarImageSource(
    221           *image.ToImageSkia(),
    222           size,
    223           std::min(width, height),
    224           AvatarImageSource::POSITION_CENTER,
    225           AvatarImageSource::BORDER_NONE));
    226 
    227   return gfx::Image(gfx::ImageSkia(source.release(), size));
    228 }
    229 
    230 gfx::Image GetAvatarIconForMenu(const gfx::Image& image,
    231                                 bool is_rectangle) {
    232   return GetSizedAvatarIcon(
    233       image, is_rectangle, kAvatarIconWidth, kAvatarIconHeight);
    234 }
    235 
    236 gfx::Image GetAvatarIconForWebUI(const gfx::Image& image,
    237                                  bool is_rectangle) {
    238   return GetSizedAvatarIcon(image, is_rectangle,
    239                             kAvatarIconWidth, kAvatarIconHeight);
    240 }
    241 
    242 gfx::Image GetAvatarIconForTitleBar(const gfx::Image& image,
    243                                     bool is_gaia_image,
    244                                     int dst_width,
    245                                     int dst_height) {
    246   // The image requires no border or resizing.
    247   if (!is_gaia_image && image.Height() <= kAvatarIconHeight)
    248     return image;
    249 
    250   int size = std::min(std::min(kAvatarIconWidth, kAvatarIconHeight),
    251                       std::min(dst_width, dst_height));
    252   gfx::Size dst_size(dst_width, dst_height);
    253 
    254   // Source for a sized icon drawn at the bottom center of the canvas,
    255   // with an etched border (for GAIA images).
    256   scoped_ptr<gfx::ImageSkiaSource> source(
    257       new AvatarImageSource(
    258           *image.ToImageSkia(),
    259           dst_size,
    260           size,
    261           AvatarImageSource::POSITION_BOTTOM_CENTER,
    262           is_gaia_image ? AvatarImageSource::BORDER_ETCHED :
    263               AvatarImageSource::BORDER_NONE));
    264 
    265   return gfx::Image(gfx::ImageSkia(source.release(), dst_size));
    266 }
    267 
    268 SkBitmap GetAvatarIconAsSquare(const SkBitmap& source_bitmap,
    269                                int scale_factor) {
    270   SkBitmap square_bitmap;
    271   if ((source_bitmap.width() == scale_factor * profiles::kAvatarIconWidth) &&
    272       (source_bitmap.height() == scale_factor * profiles::kAvatarIconHeight)) {
    273     // Shave a couple of columns so the |source_bitmap| is more square. So when
    274     // resized to a square aspect ratio it looks pretty.
    275     gfx::Rect frame(scale_factor * profiles::kAvatarIconWidth,
    276                     scale_factor * profiles::kAvatarIconHeight);
    277     frame.Inset(scale_factor * 2, 0, scale_factor * 2, 0);
    278     source_bitmap.extractSubset(&square_bitmap, gfx::RectToSkIRect(frame));
    279   } else {
    280     // If not the avatar icon's aspect ratio, the image should be square.
    281     DCHECK(source_bitmap.width() == source_bitmap.height());
    282     square_bitmap = source_bitmap;
    283   }
    284   return square_bitmap;
    285 }
    286 
    287 // Helper methods for accessing, transforming and drawing avatar icons.
    288 size_t GetDefaultAvatarIconCount() {
    289   return kDefaultAvatarIconsCount;
    290 }
    291 
    292 size_t GetGenericAvatarIconCount() {
    293   return kGenericAvatarIconsCount;
    294 }
    295 
    296 int GetPlaceholderAvatarIndex() {
    297   return kPlaceholderAvatarIcon;
    298 }
    299 
    300 int GetPlaceholderAvatarIconResourceID() {
    301   return IDR_PROFILE_AVATAR_26;
    302 }
    303 
    304 const IconResourceInfo* GetDefaultAvatarIconResourceInfo(size_t index) {
    305   static const IconResourceInfo resource_info[kDefaultAvatarIconsCount] = {
    306     { IDR_PROFILE_AVATAR_0, "avatar_generic.png"},
    307     { IDR_PROFILE_AVATAR_1, "avatar_generic_aqua.png"},
    308     { IDR_PROFILE_AVATAR_2, "avatar_generic_blue.png"},
    309     { IDR_PROFILE_AVATAR_3, "avatar_generic_green.png"},
    310     { IDR_PROFILE_AVATAR_4, "avatar_generic_orange.png"},
    311     { IDR_PROFILE_AVATAR_5, "avatar_generic_purple.png"},
    312     { IDR_PROFILE_AVATAR_6, "avatar_generic_red.png"},
    313     { IDR_PROFILE_AVATAR_7, "avatar_generic_yellow.png"},
    314     { IDR_PROFILE_AVATAR_8, "avatar_secret_agent.png"},
    315     { IDR_PROFILE_AVATAR_9, "avatar_superhero.png"},
    316     { IDR_PROFILE_AVATAR_10, "avatar_volley_ball.png"},
    317     { IDR_PROFILE_AVATAR_11, "avatar_businessman.png"},
    318     { IDR_PROFILE_AVATAR_12, "avatar_ninja.png"},
    319     { IDR_PROFILE_AVATAR_13, "avatar_alien.png"},
    320     { IDR_PROFILE_AVATAR_14, "avatar_smiley.png"},
    321     { IDR_PROFILE_AVATAR_15, "avatar_flower.png"},
    322     { IDR_PROFILE_AVATAR_16, "avatar_pizza.png"},
    323     { IDR_PROFILE_AVATAR_17, "avatar_soccer.png"},
    324     { IDR_PROFILE_AVATAR_18, "avatar_burger.png"},
    325     { IDR_PROFILE_AVATAR_19, "avatar_cat.png"},
    326     { IDR_PROFILE_AVATAR_20, "avatar_cupcake.png"},
    327     { IDR_PROFILE_AVATAR_21, "avatar_dog.png"},
    328     { IDR_PROFILE_AVATAR_22, "avatar_horse.png"},
    329     { IDR_PROFILE_AVATAR_23, "avatar_margarita.png"},
    330     { IDR_PROFILE_AVATAR_24, "avatar_note.png"},
    331     { IDR_PROFILE_AVATAR_25, "avatar_sun_cloud.png"},
    332     { IDR_PROFILE_AVATAR_26, kNoHighResAvatar},
    333   };
    334   return &resource_info[index];
    335 }
    336 
    337 int GetDefaultAvatarIconResourceIDAtIndex(size_t index) {
    338   DCHECK(IsDefaultAvatarIconIndex(index));
    339   return GetDefaultAvatarIconResourceInfo(index)->resource_id;
    340 }
    341 
    342 const char* GetDefaultAvatarIconFileNameAtIndex(size_t index) {
    343   DCHECK(index < kDefaultAvatarIconsCount);
    344   return GetDefaultAvatarIconResourceInfo(index)->filename;
    345 }
    346 
    347 const char* GetNoHighResAvatarFileName() {
    348   return kNoHighResAvatar;
    349 }
    350 
    351 base::FilePath GetPathOfHighResAvatarAtIndex(size_t index) {
    352   std::string file_name = GetDefaultAvatarIconResourceInfo(index)->filename;
    353   base::FilePath user_data_dir;
    354   PathService::Get(chrome::DIR_USER_DATA, &user_data_dir);
    355   return user_data_dir.AppendASCII(
    356       kHighResAvatarFolderName).AppendASCII(file_name);
    357 }
    358 
    359 std::string GetDefaultAvatarIconUrl(size_t index) {
    360   DCHECK(IsDefaultAvatarIconIndex(index));
    361   return base::StringPrintf("%s%" PRIuS, kDefaultUrlPrefix, index);
    362 }
    363 
    364 bool IsDefaultAvatarIconIndex(size_t index) {
    365   return index < kDefaultAvatarIconsCount;
    366 }
    367 
    368 bool IsDefaultAvatarIconUrl(const std::string& url, size_t* icon_index) {
    369   DCHECK(icon_index);
    370   if (url.find(kDefaultUrlPrefix) != 0)
    371     return false;
    372 
    373   int int_value = -1;
    374   if (base::StringToInt(base::StringPiece(url.begin() +
    375                                           strlen(kDefaultUrlPrefix),
    376                                           url.end()),
    377                         &int_value)) {
    378     if (int_value < 0 ||
    379         int_value >= static_cast<int>(kDefaultAvatarIconsCount))
    380       return false;
    381     *icon_index = int_value;
    382     return true;
    383   }
    384 
    385   return false;
    386 }
    387 
    388 }  // namespace profiles
    389