Add LegacyIDCTFilter to weights.rs so we can verify new IDCT code exp…

…orter against ancient file
imazen · Oct 21, 2020 · a8b6e01 · a8b6e01
1 parent 44dd251
commit a8b6e01
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Showing 2 changed files with 8 additions and 2 deletions.
diff --git a/imageflow_core/src/imaging/weights.rs b/imageflow_core/src/imaging/weights.rs
@@ -47,7 +47,7 @@ pub enum Filter {
     MitchellFast = 28,
     NCubic = 29,
     NCubicSharp = 30,
-
+    LegacyIDCTFilter = 31
 }
 
 
@@ -148,6 +148,12 @@ impl InterpolationDetails{
             Filter::Robidoux => InterpolationDetails::bicubic(2f64, 1.0f64,
                                                               0.3782157550939987f64,
                                                               0.3108921224530007f64),
+
+            Filter::LegacyIDCTFilter => InterpolationDetails::bicubic(2f64, 1. / 1.1685777620836932,
+                                                                      0.3782157550939987f64,
+                                                                      0.3108921224530007f64),
+
+
             Filter::Fastest => InterpolationDetails::bicubic(0.74f64,
                                                              0.74f64,
                                                              0.3782157550939987f64,

diff --git a/imageflow_core/tests/weights.rs b/imageflow_core/tests/weights.rs
@@ -142,7 +142,7 @@ fn test_output_weight_symmetric() {
         /*upscale from 2px*/ 2, 3, 2, 4, 2, 5, 2, 17,
         /*other*/ 11, 7, 7, 3,
         /* IDCT kernel sizes */ 8, 8, 8, 7, 8, 6, 8, 5, 8, 4, 8, 3, 8, 2, 8, 1];
-    let filters = [RobidouxFast, Robidoux, RobidouxSharp, Ginseng, GinsengSharp, Lanczos, LanczosSharp, Lanczos2, Lanczos2Sharp, CubicFast,Cubic, CubicSharp, CatmullRom, Mitchell, CubicBSpline, Hermite, Jinc, RawLanczos3, RawLanczos3Sharp, RawLanczos2, RawLanczos2Sharp, Triangle, Linear, Box, CatmullRomFast, CatmullRomFastSharp, Fastest, MitchellFast, NCubic, NCubicSharp
+    let filters = [RobidouxFast, Robidoux, RobidouxSharp, Ginseng, GinsengSharp, Lanczos, LanczosSharp, Lanczos2, Lanczos2Sharp, CubicFast,Cubic, CubicSharp, CatmullRom, Mitchell, CubicBSpline, Hermite, Jinc, RawLanczos3, RawLanczos3Sharp, RawLanczos2, RawLanczos2Sharp, Triangle, Linear, Box, CatmullRomFast, CatmullRomFastSharp, Fastest, MitchellFast, NCubic, NCubicSharp, LegacyIDCTFilter
     ];
     for &filter in filters.iter(){
         let details = InterpolationDetails::create(filter);