remove to_2dot2 and from_2dot2

The parametric_{r,g,b} stages are just as good now;
under the hood it's all going through approx_powf.

Change-Id: If7f3ae1e24fcee2ddb201c1d66ce1dd64820c89a
Reviewed-on: https://skia-review.googlesource.com/14320
Reviewed-by: Matt Sarett <msarett@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>

1 files changed, 4 insertions, 34 deletions

diff --git a/tests/ParametricStageTest.cpp b/tests/ParametricStageTest.cpp
index 0185abcb36..89b67c071a 100644
--- a/tests/ParametricStageTest.cpp
+++ b/tests/ParametricStageTest.cpp
@@ -41,7 +41,10 @@ static void check_error(skiatest::Reporter* r, float limit, SkColorSpaceTransfer
 }
 
 static void check_error(skiatest::Reporter* r, float limit, float gamma) {
-    check_error(r, limit, { gamma, 1.0f,0,0,0,0,0 });
+    SkColorSpaceTransferFn fn = {0,0,0,0,0,0,0};
+    fn.fG = gamma;
+    fn.fA = 1;
+    check_error(r, limit, fn);
 }
 
 DEF_TEST(Parametric_sRGB, r) {
@@ -73,36 +76,3 @@ DEF_TEST(Parametric_inv_1dot8, r) { check_error(r, 1/510.0f, 1/1.8f); }
 DEF_TEST(Parametric_inv_2dot0, r) { check_error(r, 1/510.0f, 1/2.0f); }
 DEF_TEST(Parametric_inv_2dot2, r) { check_error(r, 1/510.0f, 1/2.2f); }
 DEF_TEST(Parametric_inv_2dot4, r) { check_error(r, 1/510.0f, 1/2.4f); }
-
-// As above, checking that the stage implements gamma within limit.
-static void check_error(skiatest::Reporter* r, float limit,
-                        float gamma, SkRasterPipeline::StockStage stage) {
-
-    // We expect the gamma will only be applied to R,G,B, leaving A alone.
-    // So this isn't quite exhaustive, but it's pretty good.
-    float in[256], out[256];
-    for (int i = 0; i < 256; i++) {
-        in [i] = i / 255.0f;
-        out[i] = 0.0f;  // Not likely important.  Just being tidy.
-    }
-
-    const float* ip = in;
-    float*       op = out;
-
-    SkRasterPipeline p;
-    p.append(SkRasterPipeline::load_f32, &ip);
-    p.append(stage);
-    p.append(SkRasterPipeline::store_f32, &op);
-    p.run(0, 256/4);
-
-    for (int i = 0; i < 256; i++) {
-        float want = powf(i/255.0f, (i%4) == 3 ? 1.0f
-                                               : gamma);
-        float err = fabsf(out[i] - want);
-        if (err > limit) {
-            ERRORF(r, "At %d, error was %g (got %g, want %g)", i, err, out[i], want);
-        }
-    }
-}
-DEF_TEST(from_2dot2, r) { check_error(r, 1/510.f, 2.2f,  SkRasterPipeline::from_2dot2); }
-DEF_TEST(  to_2dot2, r) { check_error(r, 1/510.f, 1/2.2f,SkRasterPipeline::  to_2dot2); }