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https://github.com/RGBCube/serenity
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LibDraw: Add emoji support to the Font class
https://github.com/SerenityOS/serenity/issues/490
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9d64c60e01
commit
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3 changed files with 38 additions and 11 deletions
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@ -12,7 +12,8 @@ AK_OBJS = \
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../../AK/JsonObject.o \
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../../AK/JsonObject.o \
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../../AK/JsonParser.o \
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../../AK/JsonParser.o \
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../../AK/LogStream.o \
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../../AK/LogStream.o \
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../../AK/MappedFile.o
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../../AK/MappedFile.o \
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../../AK/Utf8View.o
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LIBC_OBJS = \
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LIBC_OBJS = \
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SharedBuffer.o \
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SharedBuffer.o \
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@ -8,6 +8,9 @@
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#include <LibC/mman.h>
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#include <LibC/mman.h>
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#include <LibC/stdio.h>
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#include <LibC/stdio.h>
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#include <LibC/unistd.h>
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#include <LibC/unistd.h>
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#include <AK/Utf8View.h>
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#include "Emoji.h"
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#include "GraphicsBitmap.h"
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struct [[gnu::packed]] FontFileHeader
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struct [[gnu::packed]] FontFileHeader
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{
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{
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@ -170,17 +173,37 @@ bool Font::write_to_file(const StringView& path)
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return true;
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return true;
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}
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}
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int Font::width(const StringView& string) const
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int Font::glyph_or_emoji_width(u32 codepoint) const
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{
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{
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if (!string.length())
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if (codepoint < 256)
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return 0;
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return glyph_width((char)codepoint);
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if (m_fixed_width)
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if (m_fixed_width)
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return string.length() * m_glyph_width;
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return m_glyph_width;
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int width = 0;
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auto emoji = Emoji::emoji_for_codepoint(codepoint);
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for (int i = 0; i < string.length(); ++i)
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if (emoji == nullptr)
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width += glyph_width(string.characters_without_null_termination()[i]) + 1;
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return glyph_width('?');
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return emoji->bitmap().size().width();
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return width - 1;
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}
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int Font::width(const StringView& string) const
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{
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Utf8View utf8 { string };
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return width(utf8);
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}
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int Font::width(const Utf8View& utf8) const
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{
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bool first = true;
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int width = 0;
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for (u32 codepoint : utf8) {
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if (!first)
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width += glyph_spacing();
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first = false;
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width += glyph_or_emoji_width(codepoint);
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}
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return width;
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}
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}
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@ -6,6 +6,7 @@
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#include <AK/RefCounted.h>
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#include <AK/RefCounted.h>
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#include <AK/Types.h>
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#include <AK/Types.h>
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#include <LibDraw/Rect.h>
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#include <LibDraw/Rect.h>
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#include <AK/Utf8View.h>
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// FIXME: Make a MutableGlyphBitmap buddy class for FontEditor instead?
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// FIXME: Make a MutableGlyphBitmap buddy class for FontEditor instead?
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class GlyphBitmap {
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class GlyphBitmap {
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@ -58,11 +59,13 @@ public:
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GlyphBitmap glyph_bitmap(char ch) const { return GlyphBitmap(&m_rows[(u8)ch * m_glyph_height], { glyph_width(ch), m_glyph_height }); }
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GlyphBitmap glyph_bitmap(char ch) const { return GlyphBitmap(&m_rows[(u8)ch * m_glyph_height], { glyph_width(ch), m_glyph_height }); }
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u8 glyph_width(char ch) const { return m_fixed_width ? m_glyph_width : m_glyph_widths[(u8)ch]; }
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u8 glyph_width(char ch) const { return m_fixed_width ? m_glyph_width : m_glyph_widths[(u8)ch]; }
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int glyph_or_emoji_width(u32 codepoint) const;
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u8 glyph_height() const { return m_glyph_height; }
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u8 glyph_height() const { return m_glyph_height; }
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u8 min_glyph_width() const { return m_min_glyph_width; }
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u8 min_glyph_width() const { return m_min_glyph_width; }
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u8 max_glyph_width() const { return m_max_glyph_width; }
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u8 max_glyph_width() const { return m_max_glyph_width; }
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u8 glyph_spacing() const { return m_fixed_width ? 0 : 1; }
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u8 glyph_spacing() const { return m_fixed_width ? 0 : 1; }
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int width(const StringView& string) const;
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int width(const StringView&) const;
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int width(const Utf8View&) const;
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String name() const { return m_name; }
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String name() const { return m_name; }
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void set_name(const StringView& name) { m_name = name; }
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void set_name(const StringView& name) { m_name = name; }
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