| 1 | #[cfg(feature="decoder_smush_video")] |
| 2 | enum GlyphEdge { |
| 3 | Left, |
| 4 | Top, |
| 5 | Right, |
| 6 | Bottom, |
| 7 | None |
| 8 | } |
| 9 | |
| 10 | #[cfg(feature="decoder_smush_video")] |
| 11 | impl GlyphEdge { |
| 12 | fn get(x: usize, y: usize, size: usize) -> Self { |
| 13 | if y == 0 { |
| 14 | GlyphEdge::Bottom |
| 15 | } else if y == size - 1 { |
| 16 | GlyphEdge::Top |
| 17 | } else if x == 0 { |
| 18 | GlyphEdge::Left |
| 19 | } else if x == size - 1 { |
| 20 | GlyphEdge::Right |
| 21 | } else { |
| 22 | GlyphEdge::None |
| 23 | } |
| 24 | } |
| 25 | } |
| 26 | |
| 27 | #[cfg(feature="decoder_smush_video")] |
| 28 | enum GlyphDir { |
| 29 | Left, |
| 30 | Up, |
| 31 | Right, |
| 32 | Down, |
| 33 | None |
| 34 | } |
| 35 | |
| 36 | #[cfg(feature="decoder_smush_video")] |
| 37 | impl GlyphDir { |
| 38 | fn get(edge0: GlyphEdge, edge1: GlyphEdge) -> Self { |
| 39 | match (edge0, edge1) { |
| 40 | (GlyphEdge::Left, GlyphEdge::Right) | |
| 41 | (GlyphEdge::Right, GlyphEdge::Left) => GlyphDir::Up, |
| 42 | (GlyphEdge::Top, GlyphEdge::Bottom) | |
| 43 | (GlyphEdge::Bottom, GlyphEdge::Top) => GlyphDir::Right, |
| 44 | (GlyphEdge::Bottom, _) | |
| 45 | (_, GlyphEdge::Bottom) => GlyphDir::Up, |
| 46 | (GlyphEdge::Top, _) | |
| 47 | (_, GlyphEdge::Top) => GlyphDir::Down, |
| 48 | (GlyphEdge::Left, _) | |
| 49 | (_, GlyphEdge::Left) => GlyphDir::Left, |
| 50 | (GlyphEdge::Right, _) | |
| 51 | (_, GlyphEdge::Right) => GlyphDir::Right, |
| 52 | _ => GlyphDir::None, |
| 53 | } |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | #[cfg(feature="decoder_smush_video")] |
| 58 | const XVEC4: [usize; 16] = [0, 1, 2, 3, 3, 3, 3, 2, 1, 0, 0, 0, 1, 2, 2, 1]; |
| 59 | #[cfg(feature="decoder_smush_video")] |
| 60 | const YVEC4: [usize; 16] = [0, 0, 0, 0, 1, 2, 3, 3, 3, 3, 2, 1, 1, 1, 2, 2]; |
| 61 | #[cfg(feature="decoder_smush_video")] |
| 62 | const XVEC8: [usize; 16] = [0, 2, 5, 7, 7, 7, 7, 7, 7, 5, 2, 0, 0, 0, 0, 0]; |
| 63 | #[cfg(feature="decoder_smush_video")] |
| 64 | const YVEC8: [usize; 16] = [0, 0, 0, 0, 1, 3, 4, 6, 7, 7, 7, 7, 6, 4, 3, 1]; |
| 65 | |
| 66 | #[cfg(feature="decoder_smush_video")] |
| 67 | fn make_glyphs_47(glyphs4: &mut [[u8; 16]; 256], glyphs8: &mut [[u8; 64]; 256]) { |
| 68 | for (n, glyph) in glyphs4.iter_mut().enumerate() { |
| 69 | let i = n >> 4; |
| 70 | let j = n & 0xF; |
| 71 | make_glyph_47(glyph, XVEC4[i], YVEC4[i], XVEC4[j], YVEC4[j], 4); |
| 72 | } |
| 73 | for (n, glyph) in glyphs8.iter_mut().enumerate() { |
| 74 | let i = n >> 4; |
| 75 | let j = n & 0xF; |
| 76 | make_glyph_47(glyph, XVEC8[i], YVEC8[i], XVEC8[j], YVEC8[j], 8); |
| 77 | } |
| 78 | } |
| 79 | #[cfg(feature="decoder_smush_video")] |
| 80 | fn make_glyph_47(dst: &mut [u8], xi: usize, yi: usize, xj: usize, yj: usize, size: usize) { |
| 81 | let edge0 = GlyphEdge::get(xi, yi, size); |
| 82 | let edge1 = GlyphEdge::get(xj, yj, size); |
| 83 | let dir = GlyphDir::get(edge0, edge1); |
| 84 | let npoints = if xi > xj { xi - xj } else { xj - xi }.max(if yi > yj { yi - yj } else { yj - yi }); |
| 85 | for ipoint in 0..=npoints { |
| 86 | let (p0, p1) = if npoints > 0 { |
| 87 | (interpolate(xi, xj, ipoint, npoints), |
| 88 | interpolate(yi, yj, ipoint, npoints)) |
| 89 | } else { |
| 90 | (xi, yi) |
| 91 | }; |
| 92 | let off = p0 + p1 * size; |
| 93 | match dir { |
| 94 | GlyphDir::Up => { |
| 95 | for i in 0..=p1 { |
| 96 | dst[off - i * size] = 1; |
| 97 | } |
| 98 | }, |
| 99 | GlyphDir::Down => { |
| 100 | for i in 0..size-p1 { |
| 101 | dst[off + i * size] = 1; |
| 102 | } |
| 103 | }, |
| 104 | GlyphDir::Left => { |
| 105 | for i in 0..=p0 { |
| 106 | dst[off - i] = 1; |
| 107 | } |
| 108 | }, |
| 109 | GlyphDir::Right => { |
| 110 | for i in 0..size-p0 { |
| 111 | dst[off + i] = 1; |
| 112 | } |
| 113 | }, |
| 114 | _ => {}, |
| 115 | }; |
| 116 | } |
| 117 | } |
| 118 | #[cfg(feature="decoder_smush_video")] |
| 119 | fn interpolate(a: usize, b: usize, pos1: usize, range: usize) -> usize { |
| 120 | (a * pos1 + b * (range - pos1) + range / 2) / range |
| 121 | } |
| 122 | |
| 123 | #[cfg(feature="decoder_smush_video")] |
| 124 | mod v1; |
| 125 | #[cfg(feature="decoder_smush_video")] |
| 126 | pub use v1::get_decoder_video_v1; |
| 127 | #[cfg(feature="decoder_smush_video")] |
| 128 | mod v2; |
| 129 | #[cfg(feature="decoder_smush_video")] |
| 130 | pub use v2::get_decoder_video_v2; |
| 131 | |
| 132 | #[cfg(feature="decoder_smush_audio")] |
| 133 | mod iact; |
| 134 | #[cfg(feature="decoder_smush_audio")] |
| 135 | pub use iact::get_decoder_iact; |
| 136 | #[cfg(feature="decoder_smush_audio")] |
| 137 | mod vima; |
| 138 | #[cfg(feature="decoder_smush_audio")] |
| 139 | pub use vima::get_decoder_vima; |