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LibGfx: Store BitmapFont glyph widths as a Span<u8>

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More raw pointer removal.
This commit is contained in:
Sam Atkins 2023-10-02 16:29:03 +01:00 committed by Tim Schumacher
parent f6c40abdb1
commit 8e51c7112c
Notes: sideshowbarker 2024-07-18 00:54:03 +09:00 
Author: https://github.com/AtkinsSJ
Commit: https://github.com/SerenityOS/serenity/commit/8e51c7112c
Pull-request: https://github.com/SerenityOS/serenity/pull/21298
Reviewed-by: https://github.com/timschumi ✅
2 changed files with 14 additions and 17 deletions
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24
Userland/Libraries/LibGfx/Font/BitmapFont.cpp
View file

@ -53,8 +53,8 @@ ErrorOr<NonnullRefPtr<Font>> BitmapFont::try_clone() const
auto new_rows = TRY(Core::System::allocate(m_glyph_count, bytes_per_glyph));
m_rows.copy_to(new_rows);
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, 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)));
m_glyph_widths.copy_to(new_widths);
return TRY(adopt_nonnull_ref_or_enomem(new (nothrow) BitmapFont(m_name, m_family, new_rows, new_widths, 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, new_widths.data(), fixed, glyph_width, glyph_height, 1, new_range_mask, 0, 0, 0, 400, 0, true));
return adopt_nonnull_ref_or_enomem(new (nothrow) BitmapFont("Untitled"_string, "Untitled"_string, new_rows, new_widths, fixed, glyph_width, glyph_height, 1, new_range_mask, 0, 0, 0, 400, 0, true));
}
ErrorOr<NonnullRefPtr<BitmapFont>> BitmapFont::unmasked_character_set() const
@ -84,11 +84,11 @@ ErrorOr<NonnullRefPtr<BitmapFont>> BitmapFont::unmasked_character_set() const
for (size_t code_point = 0; code_point < s_max_glyph_count; ++code_point) {
auto index = glyph_index(code_point);
if (index.has_value()) {
memcpy(&new_widths[code_point], &m_glyph_widths[index.value()], 1);
new_widths[code_point] = m_glyph_widths[index.value()];
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, 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));
return adopt_nonnull_ref_or_enomem(new (nothrow) BitmapFont(m_name, m_family, new_rows, new_widths, 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
@ -115,15 +115,15 @@ ErrorOr<NonnullRefPtr<BitmapFont>> BitmapFont::masked_character_set() const
i += 255;
continue;
}
memcpy(&new_widths[i - j * 256], &m_glyph_widths[i], 1);
new_widths[i - j * 256] = m_glyph_widths[i];
memcpy(&new_rows[(i - j * 256) * bytes_per_glyph], &m_rows[i * bytes_per_glyph], bytes_per_glyph);
}
// 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, 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));
return adopt_nonnull_ref_or_enomem(new (nothrow) BitmapFont(m_name, m_family, new_rows, new_widths, 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, Bytes 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)
BitmapFont::BitmapFont(String name, String family, Bytes rows, Span<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(range_mask)
@ -142,8 +142,6 @@ BitmapFont::BitmapFont(String name, String family, Bytes rows, u8* widths, bool
, m_fixed_width(is_fixed_width)
, m_owns_arrays(owns_arrays)
{
VERIFY(m_glyph_widths);
update_x_height();
for (size_t i = 0, index = 0; i < m_range_mask.size(); ++i) {
@ -172,7 +170,7 @@ BitmapFont::BitmapFont(String name, String family, Bytes rows, u8* widths, bool
BitmapFont::~BitmapFont()
{
if (m_owns_arrays) {
free(m_glyph_widths);
free(m_glyph_widths.data());
free(m_rows.data());
free(m_range_mask.data());
}
@ -196,7 +194,7 @@ ErrorOr<NonnullRefPtr<BitmapFont>> BitmapFont::load_from_memory(u8 const* data)
glyph_count += 256 * popcount(range_mask[i]);
u8* rows_start = range_mask_start + header.range_mask_size;
Bytes rows { rows_start, glyph_count * bytes_per_glyph };
u8* widths = rows_start + glyph_count * bytes_per_glyph;
Span<u8> widths { rows_start + glyph_count * bytes_per_glyph, glyph_count };
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, range_mask, header.baseline, header.mean_line, header.presentation_size, header.weight, header.slope));
@ -249,7 +247,7 @@ ErrorOr<void> BitmapFont::write_to_file(NonnullOwnPtr<Core::File> file)
TRY(file->write_until_depleted({ &header, sizeof(header) }));
TRY(file->write_until_depleted(m_range_mask));
TRY(file->write_until_depleted(m_rows));
TRY(file->write_until_depleted({ m_glyph_widths, m_glyph_count }));
TRY(file->write_until_depleted(m_glyph_widths));
return {};
}

7
Userland/Libraries/LibGfx/Font/BitmapFont.h
View file

@ -39,7 +39,7 @@ public:
~BitmapFont();
u8* rows() { return m_rows.data(); }
u8* widths() { return m_glyph_widths; }
u8* widths() { return m_glyph_widths.data(); }
virtual float point_size() const override { return m_presentation_size; }
@ -112,7 +112,6 @@ public:
void set_glyph_width(u32 code_point, u8 width)
{
VERIFY(m_glyph_widths);
m_glyph_widths[code_point] = width;
}
@ -131,7 +130,7 @@ public:
virtual RefPtr<Font> with_size(float point_size) const override;
private:
BitmapFont(String name, String family, Bytes rows, u8* widths, bool is_fixed_width,
BitmapFont(String name, String family, Bytes rows, Span<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 = false);
@ -152,7 +151,7 @@ private:
Vector<Optional<size_t>> m_range_indices;
Bytes m_rows;
u8* m_glyph_widths { nullptr };
Span<u8> m_glyph_widths;
OwnPtr<Core::MappedFile> m_mapped_file;
u8 m_glyph_width { 0 };