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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ui/webid/identity_ui_utils.h"
#include "base/i18n/break_iterator.h"
#include "base/i18n/case_conversion.h"
#include "base/logging.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome/grit/platform_locale_settings.h"
#include "content/public/browser/identity_request_account.h"
#include "third_party/skia/include/core/SkPath.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/image/image_skia_operations.h"
#include "ui/gfx/image/image_skia_rep_default.h"
#include "ui/gfx/monogram_utils.h"
namespace {
#if BUILDFLAG(IS_ANDROID)
// The desired size of the IDP icon used as badge for the user account avatar
// when there are multiple IDPs.
inline constexpr int kLargeAvatarBadgeSize = 20;
// The border radius of the background circle containing the IDP icon in an
// account button.
constexpr int kIdpBorderRadius = 12;
#else
// The desired size of the IDP icon used as badge for the user account avatar
// when there are multiple IDPs.
inline constexpr int kLargeAvatarBadgeSize = 16;
// The border radius of the background circle containing the IDP icon in an
// account button.
constexpr int kIdpBorderRadius = 10;
#endif // BUILDFLAG(IS_ANDROID)
// Returns an image consisting of `base_image` with `badge_image` being badged
// towards its bottom right corner. `badge_offset` is used to determine how much
// bigger the badged image should be with respect to the base image. A
// transparent circular circle is cut out from the bottom right corner of the
// output image, of size `badge_radius`. The following are prerequisites for
// invoking this method:
// * `base_image` and `badge_image` need to be square images.
// * `badge_radius` needs to be at least half of the width of `badge_image`.
// That is, the diameter of the transparent cutout needs to be larger than
// the size of `badge_image`.
gfx::ImageSkia CreateBadgedImageSkia(const gfx::ImageSkia& base_image,
const gfx::ImageSkia& badge_image,
int badge_offset_dip,
int badge_radius_dip,
float scale) {
// Get the representations for the target scale.
gfx::ImageSkiaRep base_rep = base_image.GetRepresentation(scale);
gfx::ImageSkiaRep badge_rep = badge_image.GetRepresentation(scale);
const SkBitmap& base_skbitmap = base_rep.GetBitmap();
const SkBitmap& badge_skbitmap = badge_rep.GetBitmap();
if (base_skbitmap.isNull() || badge_skbitmap.isNull()) {
// Cannot perform the operations, return `base_image` as fallback.
return base_image;
}
DCHECK_EQ(base_skbitmap.width(), base_skbitmap.height());
DCHECK_EQ(badge_skbitmap.width(), badge_skbitmap.height());
// Pixel dimensions of the bitmaps obtained for the target scale.
int base_size_px = base_skbitmap.width();
int badge_size_px = badge_skbitmap.width();
// Convert DIP parameters to pixels for calculations.
int badge_offset_px = static_cast<int>(std::round(badge_offset_dip * scale));
int badge_radius_px = static_cast<int>(std::round(badge_radius_dip * scale));
SkBitmap result_bitmap;
// Total size of the resulting bitmap in pixels.
int total_size_px = base_size_px + badge_offset_px;
result_bitmap.allocN32Pixels(total_size_px, total_size_px);
result_bitmap.eraseColor(
SK_ColorTRANSPARENT); // Initialize with transparency.
SkCanvas canvas(result_bitmap);
// Draw base image (which is already the version for the target scale).
canvas.drawImage(base_skbitmap.asImage(), 0, 0);
// Calculate badge position.
int badge_diameter_px = badge_radius_px * 2;
int badge_padding_px = badge_diameter_px - badge_size_px;
CHECK_GE(badge_padding_px, 0);
float badge_draw_start_px =
total_size_px - badge_diameter_px + badge_padding_px / 2.0f;
// Create a paint for "punching out" the background.
SkPaint clear_paint;
clear_paint.setAntiAlias(true);
clear_paint.setBlendMode(SkBlendMode::kClear);
// Calculate badge center position. We'll use a center for the circle.
float badge_cutout_center_px = total_size_px - badge_radius_px;
// "Punch out" the area around the badge, then draw the badge.
canvas.drawCircle(
SkPoint::Make(badge_cutout_center_px, badge_cutout_center_px),
badge_radius_px, clear_paint);
canvas.drawImage(badge_skbitmap.asImage(), badge_draw_start_px,
badge_draw_start_px);
return gfx::ImageSkia::CreateFromBitmap(result_bitmap, scale);
}
} // namespace
namespace webid {
LetterCircleCroppedImageSkiaSource::LetterCircleCroppedImageSkiaSource(
const std::u16string& letter,
int size)
: gfx::CanvasImageSource(gfx::Size(size, size)), letter_(letter) {}
void LetterCircleCroppedImageSkiaSource::Draw(gfx::Canvas* canvas) {
const std::vector<std::string> font_names = {
l10n_util::GetStringUTF8(IDS_NTP_FONT_FAMILY)};
gfx::DrawMonogramInCanvas(canvas, size().width(), size().width(), letter_,
font_names, SK_ColorWHITE, SK_ColorGRAY);
}
CircleCroppedImageSkiaSource::CircleCroppedImageSkiaSource(
gfx::ImageSkia avatar,
const std::optional<int>& pre_resize_avatar_crop_size,
int canvas_edge_size)
: gfx::CanvasImageSource(gfx::Size(canvas_edge_size, canvas_edge_size)) {
// The avatar may need to be scaled to match the canvas. To make sure that the
// avatar's aspect ratio is maintained, we'd need to adjust the scaled
// dimensions accordingly.
int scaled_width = canvas_edge_size;
int scaled_height = canvas_edge_size;
if (pre_resize_avatar_crop_size) {
const float avatar_scale =
canvas_edge_size / static_cast<float>(*pre_resize_avatar_crop_size);
scaled_width = floor(avatar.width() * avatar_scale);
scaled_height = floor(avatar.height() * avatar_scale);
} else {
// Resize `avatar` so that it completely fills the canvas.
const float height_ratio = static_cast<float>(avatar.height()) /
static_cast<float>(avatar.width());
if (height_ratio >= 1.0f) {
scaled_height = floor(canvas_edge_size * height_ratio);
} else {
scaled_width = floor(canvas_edge_size / height_ratio);
}
}
avatar_ = gfx::ImageSkiaOperations::CreateResizedImage(
avatar, skia::ImageOperations::RESIZE_BEST,
gfx::Size(scaled_width, scaled_height));
}
void CircleCroppedImageSkiaSource::Draw(gfx::Canvas* canvas) {
const int canvas_edge_size = size().width();
// Center the avatar in the canvas.
const int x = (canvas_edge_size - avatar_.width()) / 2;
const int y = (canvas_edge_size - avatar_.height()) / 2;
SkPath circular_mask;
circular_mask.addCircle(SkIntToScalar(canvas_edge_size / 2),
SkIntToScalar(canvas_edge_size / 2),
SkIntToScalar(canvas_edge_size / 2));
canvas->ClipPath(circular_mask, true);
canvas->DrawImageInt(avatar_, x, y);
}
std::u16string GetInitialLetterAsUppercase(const std::string& utf8_string) {
std::u16string utf16_string(base::UTF8ToUTF16(utf8_string));
base::i18n::BreakIterator iter(utf16_string,
base::i18n::BreakIterator::BREAK_CHARACTER);
if (!iter.Init()) {
return u"";
}
if (!iter.Advance()) {
return u"";
}
return base::i18n::ToUpper(iter.GetString());
}
gfx::ImageSkia CreateCircleCroppedImage(const gfx::ImageSkia& original_image,
int image_size) {
return gfx::CanvasImageSource::MakeImageSkia<CircleCroppedImageSkiaSource>(
original_image, original_image.width() * kMaskableWebIconSafeZoneRatio,
image_size);
}
gfx::ImageSkia ComputeAccountCircleCroppedPicture(
const content::IdentityRequestAccount& account,
int avatar_size,
std::optional<gfx::ImageSkia> idp_image,
float device_scale_factor) {
gfx::ImageSkia avatar;
if (account.decoded_picture.IsEmpty()) {
std::u16string letter = GetInitialLetterAsUppercase(account.display_name);
avatar = gfx::CanvasImageSource::MakeImageSkia<
LetterCircleCroppedImageSkiaSource>(letter, avatar_size);
} else {
avatar =
gfx::CanvasImageSource::MakeImageSkia<CircleCroppedImageSkiaSource>(
account.decoded_picture.AsImageSkia(), std::nullopt, avatar_size);
}
if (idp_image && idp_image->width() == idp_image->height() &&
idp_image->width() >=
kLargeAvatarBadgeSize / kMaskableWebIconSafeZoneRatio) {
gfx::ImageSkia cropped_idp_image =
CreateCircleCroppedImage(*idp_image, kLargeAvatarBadgeSize);
avatar = CreateBadgedImageSkia(avatar, cropped_idp_image, kIdpBadgeOffset,
kIdpBorderRadius, device_scale_factor);
}
if (account.is_filtered_out) {
avatar = gfx::ImageSkiaOperations::CreateTransparentImage(
avatar, kDisabledAvatarOpacity);
}
return avatar;
}
} // namespace webid
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