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LibGfx: Font, extend fonts to 384 character to support LatinExtendedA

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Hüseyin ASLITÜRK 2020-05-20 22:48:22 +03:00 • committed by Andreas Kling
parent 840a64e2f9
commit 8b3bd1a54b
2 changed files with 104 additions and 29 deletions
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110
Libraries/LibGfx/Font.cpp
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@ -103,29 +103,31 @@ NonnullRefPtr<Font> Font::clone() const
{
size_t bytes_per_glyph = sizeof(u32) * glyph_height();
// FIXME: This is leaked!
auto* new_rows = static_cast<unsigned*>(kmalloc(bytes_per_glyph * 256));
memcpy(new_rows, m_rows, bytes_per_glyph * 256);
auto* new_widths = static_cast<u8*>(kmalloc(256));
auto* new_rows = static_cast<unsigned*>(kmalloc(bytes_per_glyph * m_glyph_count));
memcpy(new_rows, m_rows, bytes_per_glyph * m_glyph_count);
auto* new_widths = static_cast<u8*>(kmalloc(m_glyph_count));
if (m_glyph_widths)
memcpy(new_widths, m_glyph_widths, 256);
memcpy(new_widths, m_glyph_widths, m_glyph_count);
else
memset(new_widths, m_glyph_width, 256);
return adopt(*new Font(m_name, new_rows, new_widths, m_fixed_width, m_glyph_width, m_glyph_height, m_glyph_spacing));
memset(new_widths, m_glyph_width, m_glyph_count);
return adopt(*new Font(m_name, new_rows, new_widths, m_fixed_width, m_glyph_width, m_glyph_height, m_glyph_spacing, m_type));
}
NonnullRefPtr<Font> Font::create(u8 glyph_height, u8 glyph_width, bool fixed)
NonnullRefPtr<Font> Font::create(u8 glyph_height, u8 glyph_width, bool fixed, FontTypes type)
{
size_t bytes_per_glyph = sizeof(u32) * glyph_height;
// FIXME: This is leaked!
auto* new_rows = static_cast<unsigned*>(malloc(bytes_per_glyph * 256));
memset(new_rows, 0, bytes_per_glyph * 256);
auto* new_widths = static_cast<u8*>(malloc(256));
memset(new_widths, glyph_width, 256);
return adopt(*new Font("Untitled", new_rows, new_widths, fixed, glyph_width, glyph_height, 1));
size_t count = glyph_count_by_type(type);
auto* new_rows = static_cast<unsigned*>(malloc(bytes_per_glyph * count));
memset(new_rows, 0, bytes_per_glyph * count);
auto* new_widths = static_cast<u8*>(malloc(count));
memset(new_widths, glyph_width, count);
return adopt(*new Font("Untitled", new_rows, new_widths, fixed, glyph_width, glyph_height, 1, type));
}
Font::Font(const StringView& name, unsigned* rows, u8* widths, bool is_fixed_width, u8 glyph_width, u8 glyph_height, u8 glyph_spacing)
Font::Font(const StringView& name, unsigned* rows, u8* widths, bool is_fixed_width, u8 glyph_width, u8 glyph_height, u8 glyph_spacing, FontTypes type)
: m_name(name)
, m_type(type)
, m_rows(rows)
, m_glyph_widths(widths)
, m_glyph_width(glyph_width)
@ -135,10 +137,12 @@ Font::Font(const StringView& name, unsigned* rows, u8* widths, bool is_fixed_wid
, m_glyph_spacing(glyph_spacing)
, m_fixed_width(is_fixed_width)
{
m_glyph_count = glyph_count_by_type(m_type);
if (!m_fixed_width) {
u8 maximum = 0;
u8 minimum = 255;
for (int i = 0; i < 256; ++i) {
for (size_t i = 0; i < m_glyph_count; ++i) {
minimum = min(minimum, m_glyph_widths[i]);
maximum = max(maximum, m_glyph_widths[i]);
}
@ -163,13 +167,34 @@ RefPtr<Font> Font::load_from_memory(const u8* data)
return nullptr;
}
FontTypes type;
if (header.type == 0)
type = FontTypes::Default;
else if (header.type == 1)
type = FontTypes::LatinExtendedA;
else
ASSERT_NOT_REACHED();
size_t count = glyph_count_by_type(type);
size_t bytes_per_glyph = sizeof(unsigned) * header.glyph_height;
auto* rows = const_cast<unsigned*>((const unsigned*)(data + sizeof(FontFileHeader)));
u8* widths = nullptr;
if (header.is_variable_width)
widths = (u8*)(rows) + 256 * bytes_per_glyph;
return adopt(*new Font(String(header.name), rows, widths, !header.is_variable_width, header.glyph_width, header.glyph_height, header.glyph_spacing));
widths = (u8*)(rows) + count * bytes_per_glyph;
return adopt(*new Font(String(header.name), rows, widths, !header.is_variable_width, header.glyph_width, header.glyph_height, header.glyph_spacing, type));
}
size_t Font::glyph_count_by_type(FontTypes type)
{
if (type == FontTypes::Default)
return 256;
if (type == FontTypes::LatinExtendedA)
return 384;
dbg() << "Unknown font type:" << type;
ASSERT_NOT_REACHED();
}
RefPtr<Font> Font::load_from_file(const StringView& path)
@ -199,19 +224,20 @@ bool Font::write_to_file(const StringView& path)
memcpy(header.magic, "!Fnt", 4);
header.glyph_width = m_glyph_width;
header.glyph_height = m_glyph_height;
header.type = 0;
header.type = m_type;
header.is_variable_width = !m_fixed_width;
header.glyph_spacing = m_glyph_spacing;
memcpy(header.name, m_name.characters(), min(m_name.length(), (size_t)63));
size_t bytes_per_glyph = sizeof(unsigned) * m_glyph_height;
size_t count = glyph_count_by_type(m_type);
auto buffer = ByteBuffer::create_uninitialized(sizeof(FontFileHeader) + (256 * bytes_per_glyph) + 256);
auto buffer = ByteBuffer::create_uninitialized(sizeof(FontFileHeader) + (count * bytes_per_glyph) + count);
BufferStream stream(buffer);
stream << ByteBuffer::wrap(&header, sizeof(FontFileHeader));
stream << ByteBuffer::wrap(m_rows, (256 * bytes_per_glyph));
stream << ByteBuffer::wrap(m_glyph_widths, 256);
stream << ByteBuffer::wrap(m_rows, (count * bytes_per_glyph));
stream << ByteBuffer::wrap(m_glyph_widths, count);
ASSERT(stream.at_end());
ssize_t nwritten = write(fd, buffer.data(), buffer.size());
@ -221,10 +247,15 @@ bool Font::write_to_file(const StringView& path)
return true;
}
GlyphBitmap Font::glyph_bitmap(u32 codepoint) const
{
return GlyphBitmap(&m_rows[codepoint * m_glyph_height], { glyph_width(codepoint), m_glyph_height });
}
int Font::glyph_or_emoji_width(u32 codepoint) const
{
if (codepoint < 256)
return glyph_width((char)codepoint);
if (codepoint < m_glyph_count)
return glyph_width(codepoint);
if (m_fixed_width)
return m_glyph_width;
@ -266,4 +297,39 @@ int Font::width(const Utf32View& view) const
return width;
}
void Font::set_type(FontTypes type)
{
if (type == m_type)
return;
if (type == FontTypes::Default)
return;
size_t new_glyph_count = glyph_count_by_type(type);
if (new_glyph_count <= m_glyph_count) {
m_glyph_count = new_glyph_count;
return;
}
int item_count_to_copy = min(m_glyph_count, new_glyph_count);
size_t bytes_per_glyph = sizeof(u32) * glyph_height();
auto* new_rows = static_cast<unsigned*>(kmalloc(bytes_per_glyph * new_glyph_count));
memset(new_rows, (unsigned)0, bytes_per_glyph * new_glyph_count);
memcpy(new_rows, m_rows, bytes_per_glyph * item_count_to_copy);
auto* new_widths = static_cast<u8*>(kmalloc(new_glyph_count));
memset(new_widths, (u8)0, new_glyph_count);
memcpy(new_widths, m_glyph_widths, item_count_to_copy);
kfree(m_rows);
kfree(m_glyph_widths);
m_type = type;
m_glyph_count = new_glyph_count;
m_rows = new_rows;
m_glyph_widths = new_widths;
}
}