From d4a29b3acaf09355b975c2a46e37aaccad0a4f43 Mon Sep 17 00:00:00 2001 From: Valentin Popov Date: Sun, 18 Oct 2026 00:19:42 +0400 Subject: Fix Indexed8 Texm palette decoding --- crates/fparkan-texm/src/lib.rs | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) (limited to 'crates/fparkan-texm/src') diff --git a/crates/fparkan-texm/src/lib.rs b/crates/fparkan-texm/src/lib.rs index 3578dd0..4b7ffaa 100644 --- a/crates/fparkan-texm/src/lib.rs +++ b/crates/fparkan-texm/src/lib.rs @@ -665,10 +665,10 @@ fn decode_mip_rgba8_internal( continue; } let out = index.saturating_mul(4); - rgba[out] = palette[palette_offset]; + rgba[out] = palette[palette_offset + 2]; rgba[out + 1] = palette[palette_offset + 1]; - rgba[out + 2] = palette[palette_offset + 2]; - rgba[out + 3] = palette[palette_offset + 3]; + rgba[out + 2] = palette[palette_offset]; + rgba[out + 3] = 255; } } DiskPixelFormat::Rgb565 => decode_words(level_data, pixel_count, &mut rgba, decode_rgb565), @@ -995,6 +995,17 @@ mod tests { assert!(matches!(err, TexmError::Format(_))); } + #[test] + fn indexed_palette_decodes_bgrx_as_opaque_rgba() { + let document = + decode_texm(Arc::from(indexed_payload().into_boxed_slice())).expect("indexed document"); + + assert_eq!( + decode_mip_rgba8(&document, 0).expect("rgba").rgba8, + [30, 20, 10, 255] + ); + } + #[test] fn channel_expansion_boundary_values_are_stable() { let document = decode_texm(Arc::from( @@ -1155,7 +1166,7 @@ mod tests { fn indexed_payload() -> Vec { let mut palette = [0_u8; 1024]; - palette[4..8].copy_from_slice(&[10, 20, 30, 255]); + palette[4..8].copy_from_slice(&[10, 20, 30, 0]); let mut out = header(1, 1, 1, 0); out.extend_from_slice(&palette); out.push(1); -- cgit v1.2.3