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Libraries: Make CharacterBitmap instances at compile-time

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`CharacterBitmap` instances are generated at run-time and put on the
heap, but they can be created in a `constexpr` context and stored in
static memory.

Also, remove additional `width` and `height` `static` values in favor
of using the `constexpr` member functions of `CharacterBitmap`.

These changes also include the removal of some initialization code
which tests if the `CharacterBitmap` is created since it is always
created and removes function-local `static` values which cause
run-time branches to ensure it is initialized each time the function
is called.
This commit is contained in:
Lenny Maiorani 2022-02-28 19:21:12 -07:00 • committed by Linus Groh
parent dc518404ce
commit d5fdc6096c
9 changed files with 97 additions and 135 deletions
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17
Userland/Libraries/LibGUI/ColumnsView.cpp
View file

@ -1,5 +1,6 @@
/*
* Copyright (c) 2020, Sergey Bugaev <bugaevc@serenityos.org>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -13,7 +14,7 @@
namespace GUI {
static const char* s_arrow_bitmap_data = {
static constexpr Gfx::CharacterBitmap s_arrow_bitmap {
" "
" # "
" ## "
@ -22,10 +23,9 @@ static const char* s_arrow_bitmap_data = {
" ### "
" ## "
" # "
" "
" ",
9, 9
};
static const int s_arrow_bitmap_width = 9;
static const int s_arrow_bitmap_height = 9;
ColumnsView::ColumnsView()
{
@ -128,7 +128,7 @@ void ColumnsView::paint_event(PaintEvent& event)
Gfx::IntRect text_rect = {
icon_rect.right() + 1 + icon_spacing(), row * item_height(),
column.width - icon_spacing() - icon_size() - icon_spacing() - icon_spacing() - s_arrow_bitmap_width - icon_spacing(), item_height()
column.width - icon_spacing() - icon_size() - icon_spacing() - icon_spacing() - static_cast<int>(s_arrow_bitmap.width()) - icon_spacing(), item_height()
};
draw_item_text(painter, index, is_selected_row, text_rect, index.data().to_string(), font_for_index(index), Gfx::TextAlignment::CenterLeft, Gfx::TextElision::None);
@ -145,11 +145,10 @@ void ColumnsView::paint_event(PaintEvent& event)
if (expandable) {
Gfx::IntRect arrow_rect = {
text_rect.right() + 1 + icon_spacing(), 0,
s_arrow_bitmap_width, s_arrow_bitmap_height
s_arrow_bitmap.width(), s_arrow_bitmap.height()
};
arrow_rect.center_vertically_within(row_rect);
static auto& arrow_bitmap = Gfx::CharacterBitmap::create_from_ascii(s_arrow_bitmap_data, s_arrow_bitmap_width, s_arrow_bitmap_height).leak_ref();
painter.draw_bitmap(arrow_rect.location(), arrow_bitmap, text_color);
painter.draw_bitmap(arrow_rect.location(), s_arrow_bitmap, text_color);
}
}
@ -201,7 +200,7 @@ void ColumnsView::update_column_sizes()
ModelIndex index = model()->index(row, m_model_column, column.parent_index);
VERIFY(index.is_valid());
auto text = index.data().to_string();
int row_width = icon_spacing() + icon_size() + icon_spacing() + font().width(text) + icon_spacing() + s_arrow_bitmap_width + icon_spacing();
int row_width = icon_spacing() + icon_size() + icon_spacing() + font().width(text) + icon_spacing() + s_arrow_bitmap.width() + icon_spacing();
if (row_width > column.width)
column.width = row_width;
}