collapse parametric_{r,g,b} into parametric, remove _a and gamma_dst

parametric_a and gamma_dst were unused outside of unit tests.

In all other cases, we always use parametric_{r,g,b} together
and always pass them the same argument.  So we can collapse
them into a single stage like gamma and to/from_srgb.

Change-Id: I08cea896c7744f97b4f4bf9e029f5d643e45e177
Reviewed-on: https://skia-review.googlesource.com/140576
Commit-Queue: Mike Klein <mtklein@chromium.org>
Reviewed-by: Brian Osman <brianosman@google.com>

1 files changed, 2 insertions, 6 deletions

diff --git a/src/core/SkColorSpaceXformSteps.cpp b/src/core/SkColorSpaceXformSteps.cpp
index 77a9c6b05d..3abdb2f05a 100644
--- a/src/core/SkColorSpaceXformSteps.cpp
+++ b/src/core/SkColorSpaceXformSteps.cpp
@@ -115,9 +115,7 @@ void SkColorSpaceXformSteps::apply(SkRasterPipeline* p) const {
                    srcTF.fF == 0) {
             p->append(SkRasterPipeline::gamma, &srcTF.fG);
         } else {
-            p->append(SkRasterPipeline::parametric_r, &srcTF);
-            p->append(SkRasterPipeline::parametric_g, &srcTF);
-            p->append(SkRasterPipeline::parametric_b, &srcTF);
+            p->append(SkRasterPipeline::parametric, &srcTF);
         }
     }
     if (flags.gamut_transform) {
@@ -134,9 +132,7 @@ void SkColorSpaceXformSteps::apply(SkRasterPipeline* p) const {
                    dstTFInv.fF == 0) {
             p->append(SkRasterPipeline::gamma, &dstTFInv.fG);
         } else {
-            p->append(SkRasterPipeline::parametric_r, &dstTFInv);
-            p->append(SkRasterPipeline::parametric_g, &dstTFInv);
-            p->append(SkRasterPipeline::parametric_b, &dstTFInv);
+            p->append(SkRasterPipeline::parametric, &dstTFInv);
         }
     }
     if (flags.premul) { p->append(SkRasterPipeline::premul); }