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metal: apply background opacity

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This commit is contained in:
Mitchell Hashimoto
2023-07-03 19:38:33 -07:00
parent 017da411f8
commit 329385e353
1 changed files with 44 additions and 23 deletions
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51
src/renderer/Metal.zig
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@ -944,30 +944,25 @@ pub fn updateCell(
fg: terminal.color.RGB,
};
// The colors for the cell.
const colors: BgFg = colors: {
// If we have a selection, then we need to check if this
// cell is selected.
// True if this cell is selected
// TODO(perf): we can check in advance if selection is in
// our viewport at all and not run this on every point.
var selection_res: ?BgFg = sel_colors: {
if (selection) |sel| {
const selected: bool = if (selection) |sel| selected: {
const screen_point = (terminal.point.Viewport{
.x = x,
.y = y,
}).toScreen(screen);
break :selected sel.contains(screen_point);
} else false;
// The colors for the cell.
const colors: BgFg = colors: {
// If we are selected, we our colors are just inverted fg/bg
if (sel.contains(screen_point)) {
break :sel_colors BgFg{
var selection_res: ?BgFg = if (selected) .{
.bg = self.config.selection_background orelse self.config.foreground,
.fg = self.config.selection_foreground orelse self.config.background,
};
}
}
break :sel_colors null;
};
} else null;
const res: BgFg = selection_res orelse if (!cell.attrs.inverse) .{
// In normal mode, background and fg match the cell. We
@ -999,11 +994,37 @@ pub fn updateCell(
// If the cell has a background, we always draw it.
if (colors.bg) |rgb| {
// Determine our background alpha. If we have transparency configured
// then this is dynamic depending on some situations. This is all
// in an attempt to make transparency look the best for various
// situations. See inline comments.
const bg_alpha: u8 = bg_alpha: {
if (self.config.background_opacity >= 1) break :bg_alpha alpha;
// If we're selected, we do not apply background opacity
if (selected) break :bg_alpha alpha;
// If we're reversed, do not apply background opacity
if (cell.attrs.inverse) break :bg_alpha alpha;
// If we have a background and its not the default background
// then we apply background opacity
if (cell.attrs.has_bg and !std.meta.eql(rgb, self.config.background)) {
break :bg_alpha alpha;
}
// We apply background opacity.
var bg_alpha: f64 = @floatFromInt(alpha);
bg_alpha *= self.config.background_opacity;
bg_alpha = @ceil(bg_alpha);
break :bg_alpha @intFromFloat(bg_alpha);
};
self.cells_bg.appendAssumeCapacity(.{
.mode = .bg,
.grid_pos = .{ @as(f32, @floatFromInt(x)), @as(f32, @floatFromInt(y)) },
.cell_width = cell.widthLegacy(),
.color = .{ rgb.r, rgb.g, rgb.b, alpha },
.color = .{ rgb.r, rgb.g, rgb.b, bg_alpha },
});
}