mirror of
https://github.com/RGBCube/serenity
synced 2025-07-25 22:37:35 +00:00
LibGfx: Move other font-related files to LibGfx/Font/
This commit is contained in:
parent
6f8fd91f22
commit
206d6ece55
131 changed files with 177 additions and 176 deletions
89
Userland/Libraries/LibGfx/Font/Emoji.cpp
Normal file
89
Userland/Libraries/LibGfx/Font/Emoji.cpp
Normal file
|
@ -0,0 +1,89 @@
|
|||
/*
|
||||
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
|
||||
* Copyright (c) 2022, Linus Groh <linusg@serenityos.org>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
||||
#include <AK/HashMap.h>
|
||||
#include <AK/Span.h>
|
||||
#include <AK/String.h>
|
||||
#include <AK/Utf8View.h>
|
||||
#include <LibGfx/Bitmap.h>
|
||||
#include <LibGfx/Font/Emoji.h>
|
||||
|
||||
namespace Gfx {
|
||||
|
||||
// https://unicode.org/reports/tr51/
|
||||
// https://unicode.org/emoji/charts/emoji-list.html
|
||||
// https://unicode.org/emoji/charts/emoji-zwj-sequences.html
|
||||
|
||||
static HashMap<Span<u32>, RefPtr<Gfx::Bitmap>> s_emojis;
|
||||
|
||||
Bitmap const* Emoji::emoji_for_code_point(u32 code_point)
|
||||
{
|
||||
return emoji_for_code_points(Array { code_point });
|
||||
}
|
||||
|
||||
Bitmap const* Emoji::emoji_for_code_points(Span<u32> const& code_points)
|
||||
{
|
||||
auto it = s_emojis.find(code_points);
|
||||
if (it != s_emojis.end())
|
||||
return (*it).value.ptr();
|
||||
|
||||
auto basename = String::join('_', code_points, "U+{:X}");
|
||||
auto bitmap_or_error = Bitmap::try_load_from_file(String::formatted("/res/emoji/{}.png", basename));
|
||||
if (bitmap_or_error.is_error()) {
|
||||
s_emojis.set(code_points, nullptr);
|
||||
return nullptr;
|
||||
}
|
||||
auto bitmap = bitmap_or_error.release_value();
|
||||
s_emojis.set(code_points, bitmap);
|
||||
return bitmap.ptr();
|
||||
}
|
||||
|
||||
Bitmap const* Emoji::emoji_for_code_point_iterator(Utf8CodePointIterator& it)
|
||||
{
|
||||
// NOTE: I'm sure this could be more efficient, e.g. by checking if each code point falls
|
||||
// into a certain range in the loop below (emojis, modifiers, variation selectors, ZWJ),
|
||||
// and bailing out early if not. Current worst case is 10 file lookups for any sequence of
|
||||
// code points (if the first glyph isn't part of the font in regular text rendering).
|
||||
|
||||
constexpr size_t max_emoji_code_point_sequence_length = 10;
|
||||
|
||||
Vector<u32, max_emoji_code_point_sequence_length> code_points;
|
||||
|
||||
struct EmojiAndCodePoints {
|
||||
Bitmap const* emoji;
|
||||
Span<u32> code_points;
|
||||
};
|
||||
Vector<EmojiAndCodePoints, max_emoji_code_point_sequence_length> possible_emojis;
|
||||
|
||||
// Determine all existing emojis for the longest possible ZWJ emoji sequence,
|
||||
// or until we run out of code points in the iterator.
|
||||
for (size_t i = 0; i < max_emoji_code_point_sequence_length; ++i) {
|
||||
auto code_point = it.peek(i);
|
||||
if (!code_point.has_value())
|
||||
break;
|
||||
code_points.append(*code_point);
|
||||
if (auto const* emoji = emoji_for_code_points(code_points))
|
||||
possible_emojis.empend(emoji, code_points);
|
||||
}
|
||||
|
||||
if (possible_emojis.is_empty())
|
||||
return nullptr;
|
||||
|
||||
// If we found one or more matches, return the longest, i.e. last. For example:
|
||||
// U+1F3F3 - white flag
|
||||
// U+1F3F3 U+FE0F U+200D U+1F308 - rainbow flag
|
||||
auto& [emoji, emoji_code_points] = possible_emojis.last();
|
||||
|
||||
// Advance the iterator, so it's on the last code point of our found emoji and
|
||||
// whoever is iterating will advance to the next new code point.
|
||||
for (size_t i = 0; i < emoji_code_points.size() - 1; ++i)
|
||||
++it;
|
||||
|
||||
return emoji;
|
||||
}
|
||||
|
||||
}
|
Loading…
Add table
Add a link
Reference in a new issue