Notifications API support for images with multiple scale factors.

chrome/browser/extensions/api/notifications/notifications_api.cc

Index: chrome/browser/extensions/api/notifications/notifications_api.cc
diff --git a/chrome/browser/extensions/api/notifications/notifications_api.cc b/chrome/browser/extensions/api/notifications/notifications_api.cc
index 2e6d46f6a35c6c78d411888a2b758d96f582e3d8..93f3dcb423711c5bad58cb12b49dacfa4b0c4358 100644
--- a/chrome/browser/extensions/api/notifications/notifications_api.cc
+++ b/chrome/browser/extensions/api/notifications/notifications_api.cc
@@ -53,34 +53,42 @@ const char kExtraListItemsProvided[] =
 const char kExtraImageProvided[] =
     "Image resource provided for notification type != image";
 
-// Converts an object with width, height, and data in RGBA format into an
-// gfx::Image (in ARGB format).
-bool NotificationBitmapToGfxImage(
-    float max_scale,
-    const gfx::Size& target_size_dips,
-    api::notifications::NotificationBitmap* notification_bitmap,
-    gfx::Image* return_image) {
-  if (!notification_bitmap)
+typedef std::vector<linked_ptr<notifications::ImageRepresentation> >
+    ImageRepresentationList;
+
+bool ImageRepresentationToImageSkiaRep(float max_scale,
+                                       const gfx::Size& target_size_dips,
+                                       notifications::BitmapData* bitmap_data,
+                                       float configured_scale,
+                                       gfx::ImageSkiaRep* return_rep) {
+  if (!bitmap_data || !return_rep) {
+    LOG(WARNING) << "Bitmap data: " << bitmap_data;
+    LOG(WARNING) << "return_rep: " << return_rep;
+
     return false;
+  }
 
   const int max_device_pixel_width = target_size_dips.width() * max_scale;
   const int max_device_pixel_height = target_size_dips.height() * max_scale;
 
   const int BYTES_PER_PIXEL = 4;
 
-  const int width = notification_bitmap->width;
-  const int height = notification_bitmap->height;
+  const int width = bitmap_data->width;
+  const int height = bitmap_data->height;
 
-  if (width < 0 || height < 0 || width > max_device_pixel_width ||
-      height > max_device_pixel_height)
+  if (configured_scale < 1.0f || width < 0 || height < 0 ||
+      width > max_device_pixel_width || height > max_device_pixel_height) {
+    LOG(WARNING) << "Configured scale: " << configured_scale;
+    LOG(WARNING) << "width: " << width;
+    LOG(WARNING) << "height: " << height;
     return false;
+  }
 
   // Ensure we have rgba data.
-  std::string* rgba_data = notification_bitmap->data.get();
-  if (!rgba_data)
+  if (!bitmap_data->data.length())
     return false;
 
-  const size_t rgba_data_length = rgba_data->length();
+  const size_t rgba_data_length = bitmap_data->data.length();
   const size_t rgba_area = width * height;
 
   if (rgba_data_length != rgba_area * BYTES_PER_PIXEL)
@@ -99,7 +107,7 @@ bool NotificationBitmapToGfxImage(
     return false;
 
   uint32_t* pixels = bitmap.getAddr32(0, 0);
-  const char* c_rgba_data = rgba_data->data();
+  const char* c_rgba_data = bitmap_data->data.data();
 
   for (size_t t = 0; t < rgba_area; ++t) {
     // |c_rgba_data| is RGBA, pixels is ARGB.
@@ -113,8 +121,37 @@ bool NotificationBitmapToGfxImage(
 
   // TODO(dewittj): Handle HiDPI images with more than one scale factor
   // representation.
-  gfx::ImageSkia skia(gfx::ImageSkiaRep(bitmap, 1.0f));
-  *return_image = gfx::Image(skia);
+  *return_rep = gfx::ImageSkiaRep(bitmap, configured_scale);
+  return true;
+}
+
+// Converts an object with width, height, and data in RGBA format into an
+// gfx::Image (in ARGB format).
+bool ImageRepresentationListToGfxImage(float max_scale,
+                                       const gfx::Size& target_size_dips,
+                                       ImageRepresentationList* bitmap_list,
+                                       gfx::Image* return_image) {
+  if (!bitmap_list || bitmap_list->size() == 0)
+    return false;
+
+  gfx::ImageSkia out;
+  ImageRepresentationList::iterator iter = bitmap_list->begin();
+  while (iter != bitmap_list->end()) {
+    notifications::ImageRepresentation* rep = (*iter).get();
+    if (rep->density > max_scale)
+      return false;
+
+    notifications::BitmapData* bitmap = rep->src.as_bitmap_data.get();
+    gfx::ImageSkiaRep skia_rep;
+    if (!ImageRepresentationToImageSkiaRep(
+            max_scale, target_size_dips, bitmap, rep->density, &skia_rep))
+      return false;
+
+    out.AddRepresentation(skia_rep);
+
+    ++iter;
+  }
+  *return_image = gfx::Image(out);
   return true;
 }
 
@@ -260,8 +297,12 @@ bool NotificationsApiFunction::CreateNotification(
   // These fields are defined as optional in IDL such that they can be used as
   // optional for notification updates. But for notification creations, they
   // should be present.
+  if (options->icon_reps == NULL || options->icon_reps->size() < 1) {
+    SetError(kMissingRequiredPropertiesForCreateNotification);
+    return false;
+  }
   if (options->type == api::notifications::TEMPLATE_TYPE_NONE ||
-      !options->icon_url || !options->title || !options->message) {
+      !options->title || !options->message) {
     SetError(kMissingRequiredPropertiesForCreateNotification);
     return false;
   }
@@ -278,10 +319,10 @@ bool NotificationsApiFunction::CreateNotification(
   const base::string16 message(base::UTF8ToUTF16(*options->message));
   gfx::Image icon;
 
-  if (!NotificationBitmapToGfxImage(image_scale,
-                                    bitmap_sizes.icon_size,
-                                    options->icon_bitmap.get(),
-                                    &icon)) {
+  if (!ImageRepresentationListToGfxImage(image_scale,
+                                         bitmap_sizes.icon_size,
+                                         options->icon_reps.get(),
+                                         &icon)) {
     SetError(kUnableToDecodeIconError);
     return false;
   }
@@ -302,10 +343,10 @@ bool NotificationsApiFunction::CreateNotification(
     for (size_t i = 0; i < number_of_buttons; i++) {
       message_center::ButtonInfo info(
           base::UTF8ToUTF16((*options->buttons)[i]->title));
-      NotificationBitmapToGfxImage(image_scale,
-                                   bitmap_sizes.button_icon_size,
-                                   (*options->buttons)[i]->icon_bitmap.get(),
-                                   &info.icon);
+      ImageRepresentationListToGfxImage(image_scale,
+                                        bitmap_sizes.button_icon_size,
+                                        (*options->buttons)[i]->icon_reps.get(),
+                                        &info.icon);
       optional_fields.buttons.push_back(info);
     }
   }
@@ -315,10 +356,10 @@ bool NotificationsApiFunction::CreateNotification(
         base::UTF8ToUTF16(*options->context_message);
   }
 
-  bool has_image = NotificationBitmapToGfxImage(image_scale,
-                                                bitmap_sizes.image_size,
-                                                options->image_bitmap.get(),
-                                                &optional_fields.image);
+  bool has_image = ImageRepresentationListToGfxImage(image_scale,
+                                                     bitmap_sizes.image_size,
+                                                     options->image_reps.get(),
+                                                     &optional_fields.image);
   // We should have an image if and only if the type is an image type.
   if (has_image != (type == message_center::NOTIFICATION_TYPE_IMAGE)) {
     SetError(kExtraImageProvided);
@@ -398,10 +439,10 @@ bool NotificationsApiFunction::UpdateNotification(
     notification->set_message(base::UTF8ToUTF16(*options->message));
 
   // TODO(dewittj): Return error if this fails.
-  if (options->icon_bitmap) {
+  if (options->icon_reps) {
     gfx::Image icon;
-    NotificationBitmapToGfxImage(
-        image_scale, bitmap_sizes.icon_size, options->icon_bitmap.get(), &icon);
+    ImageRepresentationListToGfxImage(
+        image_scale, bitmap_sizes.icon_size, options->icon_reps.get(), &icon);
     notification->set_icon(icon);
   }
 
@@ -420,10 +461,10 @@ bool NotificationsApiFunction::UpdateNotification(
     for (size_t i = 0; i < number_of_buttons; i++) {
       message_center::ButtonInfo button(
           base::UTF8ToUTF16((*options->buttons)[i]->title));
-      NotificationBitmapToGfxImage(image_scale,
-                                   bitmap_sizes.button_icon_size,
-                                   (*options->buttons)[i]->icon_bitmap.get(),
-                                   &button.icon);
+      ImageRepresentationListToGfxImage(image_scale,
+                                        bitmap_sizes.button_icon_size,
+                                        (*options->buttons)[i]->icon_reps.get(),
+                                        &button.icon);
       buttons.push_back(button);
     }
     notification->set_buttons(buttons);
@@ -435,10 +476,8 @@ bool NotificationsApiFunction::UpdateNotification(
   }
 
   gfx::Image image;
-  bool has_image = NotificationBitmapToGfxImage(image_scale,
-                                                bitmap_sizes.image_size,
-                                                options->image_bitmap.get(),
-                                                &image);
+  bool has_image = ImageRepresentationListToGfxImage(
+      image_scale, bitmap_sizes.image_size, options->image_reps.get(), &image);
   if (has_image) {
     // We should have an image if and only if the type is an image type.
     if (notification->type() != message_center::NOTIFICATION_TYPE_IMAGE) {