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LibGfx: Store BitmapFont range mask as Bytes instead of pointer and size

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This commit is contained in:
Sam Atkins 2023-10-02 15:45:17 +01:00 committed by Tim Schumacher
parent 533ec5a06f
commit 415a024bc8
2 changed files with 19 additions and 20 deletions
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33
Userland/Libraries/LibGfx/Font/BitmapFont.cpp
View file

@ -47,14 +47,14 @@ NonnullRefPtr<Font> BitmapFont::clone() const
ErrorOr<NonnullRefPtr<Font>> BitmapFont::try_clone() const
{
auto new_range_mask = TRY(Core::System::allocate(m_range_mask_size, 1));
memcpy(new_range_mask.data(), m_range_mask, m_range_mask_size);
auto new_range_mask = TRY(Core::System::allocate(m_range_mask.size(), 1));
m_range_mask.copy_to(new_range_mask);
size_t bytes_per_glyph = sizeof(u32) * glyph_height();
auto new_rows = TRY(Core::System::allocate(m_glyph_count, bytes_per_glyph));
memcpy(new_rows.data(), m_rows, bytes_per_glyph * m_glyph_count);
auto new_widths = TRY(Core::System::allocate(m_glyph_count, 1));
memcpy(new_widths.data(), m_glyph_widths, m_glyph_count);
return TRY(adopt_nonnull_ref_or_enomem(new (nothrow) BitmapFont(m_name, m_family, new_rows.data(), new_widths.data(), m_fixed_width, m_glyph_width, m_glyph_height, m_glyph_spacing, m_range_mask_size, new_range_mask.data(), m_baseline, m_mean_line, m_presentation_size, m_weight, m_slope, true)));
return TRY(adopt_nonnull_ref_or_enomem(new (nothrow) BitmapFont(m_name, m_family, new_rows.data(), new_widths.data(), m_fixed_width, m_glyph_width, m_glyph_height, m_glyph_spacing, new_range_mask, m_baseline, m_mean_line, m_presentation_size, m_weight, m_slope, true)));
}
ErrorOr<NonnullRefPtr<BitmapFont>> BitmapFont::create(u8 glyph_height, u8 glyph_width, bool fixed, size_t glyph_count)
@ -70,7 +70,7 @@ ErrorOr<NonnullRefPtr<BitmapFont>> BitmapFont::create(u8 glyph_height, u8 glyph_
size_t bytes_per_glyph = sizeof(u32) * glyph_height;
auto new_rows = TRY(Core::System::allocate(glyph_count, bytes_per_glyph));
auto new_widths = TRY(Core::System::allocate(glyph_count, 1));
return adopt_nonnull_ref_or_enomem(new (nothrow) BitmapFont("Untitled"_string, "Untitled"_string, new_rows.data(), new_widths.data(), fixed, glyph_width, glyph_height, 1, range_mask_size, new_range_mask.data(), 0, 0, 0, 400, 0, true));
return adopt_nonnull_ref_or_enomem(new (nothrow) BitmapFont("Untitled"_string, "Untitled"_string, new_rows.data(), new_widths.data(), fixed, glyph_width, glyph_height, 1, new_range_mask, 0, 0, 0, 400, 0, true));
}
ErrorOr<NonnullRefPtr<BitmapFont>> BitmapFont::unmasked_character_set() const
@ -88,7 +88,7 @@ ErrorOr<NonnullRefPtr<BitmapFont>> BitmapFont::unmasked_character_set() const
memcpy(&new_rows[code_point * bytes_per_glyph], &m_rows[index.value() * bytes_per_glyph], bytes_per_glyph);
}
}
return adopt_nonnull_ref_or_enomem(new (nothrow) BitmapFont(m_name, m_family, new_rows.data(), new_widths.data(), m_fixed_width, m_glyph_width, m_glyph_height, m_glyph_spacing, s_max_range_mask_size, new_range_mask.data(), m_baseline, m_mean_line, m_presentation_size, m_weight, m_slope, true));
return adopt_nonnull_ref_or_enomem(new (nothrow) BitmapFont(m_name, m_family, new_rows.data(), new_widths.data(), m_fixed_width, m_glyph_width, m_glyph_height, m_glyph_spacing, new_range_mask, m_baseline, m_mean_line, m_presentation_size, m_weight, m_slope, true));
}
ErrorOr<NonnullRefPtr<BitmapFont>> BitmapFont::masked_character_set() const
@ -118,13 +118,14 @@ ErrorOr<NonnullRefPtr<BitmapFont>> BitmapFont::masked_character_set() const
memcpy(&new_widths[i - j * 256], &m_glyph_widths[i], 1);
memcpy(&new_rows[(i - j * 256) * bytes_per_glyph], &m_rows[i * bytes_per_glyph], bytes_per_glyph);
}
return adopt_nonnull_ref_or_enomem(new (nothrow) BitmapFont(m_name, m_family, new_rows.data(), new_widths.data(), m_fixed_width, m_glyph_width, m_glyph_height, m_glyph_spacing, new_range_mask_size, new_range_mask.data(), m_baseline, m_mean_line, m_presentation_size, m_weight, m_slope, true));
// Now that we're done working with the range-mask memory, reduce its reported size down to what it should be.
new_range_mask = { new_range_mask.data(), new_range_mask_size };
return adopt_nonnull_ref_or_enomem(new (nothrow) BitmapFont(m_name, m_family, new_rows.data(), new_widths.data(), m_fixed_width, m_glyph_width, m_glyph_height, m_glyph_spacing, new_range_mask, m_baseline, m_mean_line, m_presentation_size, m_weight, m_slope, true));
}
BitmapFont::BitmapFont(String name, String family, u8* rows, u8* widths, bool is_fixed_width, u8 glyph_width, u8 glyph_height, u8 glyph_spacing, u16 range_mask_size, u8* range_mask, u8 baseline, u8 mean_line, u8 presentation_size, u16 weight, u8 slope, bool owns_arrays)
BitmapFont::BitmapFont(String name, String family, u8* rows, u8* widths, bool is_fixed_width, u8 glyph_width, u8 glyph_height, u8 glyph_spacing, Bytes range_mask, u8 baseline, u8 mean_line, u8 presentation_size, u16 weight, u8 slope, bool owns_arrays)
: m_name(move(name))
, m_family(move(family))
, m_range_mask_size(range_mask_size)
, m_range_mask(range_mask)
, m_rows(rows)
, m_glyph_widths(widths)
@ -141,13 +142,12 @@ BitmapFont::BitmapFont(String name, String family, u8* rows, u8* widths, bool is
, m_fixed_width(is_fixed_width)
, m_owns_arrays(owns_arrays)
{
VERIFY(m_range_mask);
VERIFY(m_rows);
VERIFY(m_glyph_widths);
update_x_height();
for (size_t i = 0, index = 0; i < m_range_mask_size; ++i) {
for (size_t i = 0, index = 0; i < m_range_mask.size(); ++i) {
for (size_t j = 0; j < 8; ++j) {
if (m_range_mask[i] & (1 << j)) {
m_glyph_count += 256;
@ -175,7 +175,7 @@ BitmapFont::~BitmapFont()
if (m_owns_arrays) {
free(m_glyph_widths);
free(m_rows);
free(m_range_mask);
free(m_range_mask.data());
}
}
@ -191,14 +191,15 @@ ErrorOr<NonnullRefPtr<BitmapFont>> BitmapFont::load_from_memory(u8 const* data)
size_t bytes_per_glyph = sizeof(u32) * header.glyph_height;
size_t glyph_count { 0 };
u8* range_mask = const_cast<u8*>(data + sizeof(FontFileHeader));
u8* range_mask_start = const_cast<u8*>(data + sizeof(FontFileHeader));
Bytes range_mask { range_mask_start, header.range_mask_size };
for (size_t i = 0; i < header.range_mask_size; ++i)
glyph_count += 256 * popcount(range_mask[i]);
u8* rows = range_mask + header.range_mask_size;
u8* rows = range_mask_start + header.range_mask_size;
u8* widths = (u8*)(rows) + glyph_count * bytes_per_glyph;
auto name = TRY(String::from_utf8(ReadonlyBytes { header.name, strlen(header.name) }));
auto family = TRY(String::from_utf8(ReadonlyBytes { header.family, strlen(header.family) }));
return adopt_nonnull_ref_or_enomem(new (nothrow) BitmapFont(move(name), move(family), rows, widths, !header.is_variable_width, header.glyph_width, header.glyph_height, header.glyph_spacing, header.range_mask_size, range_mask, header.baseline, header.mean_line, header.presentation_size, header.weight, header.slope));
return adopt_nonnull_ref_or_enomem(new (nothrow) BitmapFont(move(name), move(family), rows, widths, !header.is_variable_width, header.glyph_width, header.glyph_height, header.glyph_spacing, range_mask, header.baseline, header.mean_line, header.presentation_size, header.weight, header.slope));
}
RefPtr<BitmapFont> BitmapFont::load_from_file(DeprecatedString const& path)
@ -234,7 +235,7 @@ ErrorOr<void> BitmapFont::write_to_file(NonnullOwnPtr<Core::File> file)
memcpy(header.magic, "!Fnt", 4);
header.glyph_width = m_glyph_width;
header.glyph_height = m_glyph_height;
header.range_mask_size = m_range_mask_size;
header.range_mask_size = m_range_mask.size();
header.baseline = m_baseline;
header.mean_line = m_mean_line;
header.is_variable_width = !m_fixed_width;
@ -247,7 +248,7 @@ ErrorOr<void> BitmapFont::write_to_file(NonnullOwnPtr<Core::File> file)
size_t bytes_per_glyph = sizeof(u32) * m_glyph_height;
TRY(file->write_until_depleted({ &header, sizeof(header) }));
TRY(file->write_until_depleted({ m_range_mask, m_range_mask_size }));
TRY(file->write_until_depleted(m_range_mask));
TRY(file->write_until_depleted({ m_rows, m_glyph_count * bytes_per_glyph }));
TRY(file->write_until_depleted({ m_glyph_widths, m_glyph_count }));

6
Userland/Libraries/LibGfx/Font/BitmapFont.h
View file

@ -119,7 +119,6 @@ public:
size_t glyph_count() const override { return m_glyph_count; }
Optional<size_t> glyph_index(u32 code_point) const;
u16 range_size() const { return m_range_mask_size; }
bool is_range_empty(u32 code_point) const { return !(m_range_mask[code_point / 256 / 8] & 1 << (code_point / 256 % 8)); }
virtual String family() const override { return m_family; }
@ -133,7 +132,7 @@ public:
private:
BitmapFont(String name, String family, u8* rows, u8* widths, bool is_fixed_width,
u8 glyph_width, u8 glyph_height, u8 glyph_spacing, u16 range_mask_size, u8* range_mask,
u8 glyph_width, u8 glyph_height, u8 glyph_spacing, Bytes range_mask,
u8 baseline, u8 mean_line, u8 presentation_size, u16 weight, u8 slope, bool owns_arrays = false);
static ErrorOr<NonnullRefPtr<BitmapFont>> load_from_memory(u8 const*);
@ -149,8 +148,7 @@ private:
String m_family;
size_t m_glyph_count { 0 };
u16 m_range_mask_size { 0 };
u8* m_range_mask { nullptr };
Bytes m_range_mask;
Vector<Optional<size_t>> m_range_indices;
u8* m_rows { nullptr };