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FontEditor: Use memset/memcpy to copy/paste/delete glyphs

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Iterating over each glyph to set bits was rather slow in large
selections. This lets us edit the entire character set almost
instantly.
This commit is contained in:
thankyouverycool 2022-03-17 07:53:04 -04:00 • committed by Andreas Kling
parent 3d1591a822
commit 17b16f3997
1 changed files with 38 additions and 68 deletions
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106
Userland/Applications/FontEditor/FontEditor.cpp
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@ -820,35 +820,20 @@ void FontEditorWidget::set_scale_and_save(i32 scale)
void FontEditorWidget::copy_selected_glyphs()
{
ByteBuffer buffer;
int first_glyph = -1;
size_t glyph_count = 0;
auto append_glyph_to_buffer = [&](int glyph) {
if (!edited_font().contains_glyph(glyph))
return;
if (first_glyph == -1 || glyph < first_glyph)
first_glyph = glyph;
buffer.append({ (char*)&glyph, sizeof(int) });
auto bitmap = edited_font().raw_glyph(glyph).glyph_bitmap();
buffer.append((u8)bitmap.width());
buffer.append((u8)bitmap.height());
for (int x = 0; x < bitmap.width(); x++) {
for (int y = 0; y < bitmap.height(); y++)
buffer.append(bitmap.bit_at(x, y));
}
glyph_count++;
};
size_t bytes_per_glyph = Gfx::GlyphBitmap::bytes_per_row() * edited_font().glyph_height();
auto selection = m_glyph_map_widget->selection().normalized();
for (int i = selection.start(); i < selection.start() + selection.size(); i++)
append_glyph_to_buffer(i);
auto* rows = m_edited_font->rows() + selection.start() * bytes_per_glyph;
auto* widths = m_edited_font->widths() + selection.start();
ByteBuffer buffer;
buffer.append(rows, bytes_per_glyph * selection.size());
buffer.append(widths, selection.size());
HashMap<String, String> metadata;
metadata.set("first_glyph", String::number(first_glyph));
metadata.set("count", String::number(glyph_count));
metadata.set("start", String::number(selection.start()));
metadata.set("count", String::number(selection.size()));
metadata.set("width", String::number(edited_font().max_glyph_width()));
metadata.set("height", String::number(edited_font().glyph_height()));
GUI::Clipboard::the().set_data(buffer.bytes(), "glyph/x-fonteditor", metadata);
}
@ -863,9 +848,13 @@ void FontEditorWidget::paste_glyphs()
auto [data, mime_type, metadata] = GUI::Clipboard::the().fetch_data_and_type();
if (!mime_type.starts_with("glyph/"))
return;
;
auto glyph_count = metadata.get("count").value_or("0").to_uint().value_or(0);
if (glyph_count == 0)
auto glyph_count = metadata.get("count").value().to_uint().value_or(0);
if (!glyph_count)
return;
auto height = metadata.get("height").value().to_uint().value_or(0);
if (!height)
return;
// FIXME: This is a hack to avoid regression and still doesn't support
@ -875,35 +864,21 @@ void FontEditorWidget::paste_glyphs()
m_glyph_editor_widget->on_undo_event();
}
auto first_glyph = metadata.get("first_glyph").value_or("0").to_uint().value_or(0);
auto selection = m_glyph_map_widget->selection().normalized();
auto range_bound_glyph_count = min(glyph_count, 1 + m_range.last - selection.start());
InputMemoryStream stream(data.bytes());
for (size_t s = 0; s < glyph_count; s++) {
int copied_glyph {};
char width {};
char height {};
stream >> Bytes { (char*)&copied_glyph, sizeof(int) } >> width >> height;
if (stream.has_any_error()) {
dbgln("Failed to read glyph from clipboard, aborting!");
return;
}
size_t bytes_per_glyph = Gfx::GlyphBitmap::bytes_per_row() * edited_font().glyph_height();
size_t bytes_per_copied_glyph = Gfx::GlyphBitmap::bytes_per_row() * height;
size_t copyable_bytes_per_glyph = min(bytes_per_glyph, bytes_per_copied_glyph);
auto* rows = m_edited_font->rows() + selection.start() * bytes_per_glyph;
auto* widths = m_edited_font->widths() + selection.start();
int glyph = m_glyph_map_widget->active_glyph() + (copied_glyph - first_glyph);
auto bitmap = edited_font().raw_glyph(glyph).glyph_bitmap();
m_edited_font->set_glyph_width(glyph, min(width, edited_font().max_glyph_width()));
for (int x = 0; x < min(width, edited_font().max_glyph_width()); x++) {
for (int y = 0; y < min(height, edited_font().glyph_height()); y++) {
char byte;
stream >> byte;
if (stream.has_any_error()) {
dbgln("Failed to read glyph from clipboard, aborting!");
return;
}
bitmap.set_bit_at(x, y, byte);
}
}
if (m_glyph_editor_widget->on_glyph_altered)
m_glyph_editor_widget->on_glyph_altered(glyph);
for (size_t i = 0; i < range_bound_glyph_count; ++i) {
auto copyable_width = edited_font().is_fixed_width()
? edited_font().glyph_fixed_width()
: min(edited_font().max_glyph_width(), data[bytes_per_copied_glyph * glyph_count + i]);
memcpy(&rows[i * bytes_per_glyph], &data[i * bytes_per_copied_glyph], copyable_bytes_per_glyph);
memset(&widths[i], copyable_width, sizeof(u8));
}
if (m_edited_font->is_fixed_width())
@ -912,21 +887,12 @@ void FontEditorWidget::paste_glyphs()
m_glyph_editor_width_spinbox->set_value(m_edited_font->raw_glyph_width(m_glyph_map_widget->active_glyph()), GUI::AllowCallback::No);
m_glyph_editor_widget->update();
m_glyph_map_widget->update();
update_statusbar();
}
void FontEditorWidget::delete_selected_glyphs()
{
auto delete_glyph = [&](int glyph) {
auto bitmap = m_edited_font->raw_glyph(glyph).glyph_bitmap();
m_edited_font->set_glyph_width(glyph, 0);
for (int x = 0; x < m_edited_font->max_glyph_width(); x++)
for (int y = 0; y < m_edited_font->glyph_height(); y++)
bitmap.set_bit_at(x, y, false);
if (m_glyph_editor_widget->on_glyph_altered)
m_glyph_editor_widget->on_glyph_altered(glyph);
};
auto selection = m_glyph_map_widget->selection().normalized();
// FIXME: This is a hack to avoid regression and still doesn't support
@ -936,8 +902,11 @@ void FontEditorWidget::delete_selected_glyphs()
m_glyph_editor_widget->on_undo_event();
}
for (int i = selection.start(); i < selection.start() + selection.size(); i++)
delete_glyph(i);
size_t bytes_per_glyph = Gfx::GlyphBitmap::bytes_per_row() * m_edited_font->glyph_height();
auto* rows = m_edited_font->rows() + selection.start() * bytes_per_glyph;
auto* widths = m_edited_font->widths() + selection.start();
memset(rows, 0, bytes_per_glyph * selection.size());
memset(widths, 0, selection.size());
if (m_edited_font->is_fixed_width())
m_glyph_editor_present_checkbox->set_checked(false, GUI::AllowCallback::No);
@ -945,5 +914,6 @@ void FontEditorWidget::delete_selected_glyphs()
m_glyph_editor_width_spinbox->set_value(0, GUI::AllowCallback::No);
m_glyph_editor_widget->update();
m_glyph_map_widget->update();
update_statusbar();
}