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fix(gui): prevent crash on very small font sizes

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This commit is contained in:
CJ van den Berg 2026-04-01 13:31:00 +02:00
parent 6292000ada
commit 6954983d40
Signed by: neurocyte
GPG key ID: 8EB1E1BB660E3FB9
1 changed files with 3 additions and 3 deletions
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6
src/gui/rasterizer/truetype.zig
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@ -61,17 +61,17 @@ pub fn loadFont(self: *Self, name: []const u8, size_px: u16) !Font {
-@as(i32, block_bbox.y0) -@as(i32, block_bbox.y0)
else else
@as(i32, @intFromFloat(@ceil(@as(f32, @floatFromInt(vm.ascent)) * scale))); @as(i32, @intFromFloat(@ceil(@as(f32, @floatFromInt(vm.ascent)) * scale)));
const cell_h: u16 = @as(u16, if (has_block) const cell_h: u16 = if (has_block)
@intCast(@max(block_bbox.y1 - block_bbox.y0, 1)) @intCast(@max(block_bbox.y1 - block_bbox.y0, 1))
else blk: { else blk: {
const d: i32 = @intFromFloat(@floor(@as(f32, @floatFromInt(vm.descent)) * scale)); const d: i32 = @intFromFloat(@floor(@as(f32, @floatFromInt(vm.descent)) * scale));
break :blk @intCast(@max(ascent_px - d, 1)); break :blk @intCast(@max(ascent_px - d, 1));
}) -| 1; };
const m_glyph = tt.codepointGlyphIndex('M'); const m_glyph = tt.codepointGlyphIndex('M');
const m_hmetrics = tt.glyphHMetrics(m_glyph); const m_hmetrics = tt.glyphHMetrics(m_glyph);
const cell_w_f: f32 = @as(f32, @floatFromInt(m_hmetrics.advance_width)) * scale; const cell_w_f: f32 = @as(f32, @floatFromInt(m_hmetrics.advance_width)) * scale;
const cell_w: u16 = @as(u16, @intFromFloat(@ceil(cell_w_f))) -| 1; const cell_w: u16 = @max(1, @as(u16, @intFromFloat(@ceil(cell_w_f))));
try self.font_data.append(self.allocator, data); try self.font_data.append(self.allocator, data);