jumper, table_{r,g,b,a}

In testing, it didn't really seem like we're getting anything out of
doing an interpolated lookup, so this just does a single rounded lookup.

Change-Id: If85ba68675945b442076519dd7f1bf7540d1628d
Reviewed-on: https://skia-review.googlesource.com/13646
Commit-Queue: Matt Sarett <msarett@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
Reviewed-by: Matt Sarett <msarett@google.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/jumper/SkJumper_stages.cpp b/src/jumper/SkJumper_stages.cpp
index 590426b571..b366cf5b12 100644
--- a/src/jumper/SkJumper_stages.cpp
+++ b/src/jumper/SkJumper_stages.cpp
@@ -663,6 +663,14 @@ STAGE(byte_tables_rgb) {
     b = from_byte(gather(tables->b, round(b, scale)));
 }
 
+SI F table(F v, const SkJumper_TableCtx* ctx) {
+    return gather(ctx->table, round(v, ctx->size - 1));
+}
+STAGE(table_r) { r = table(r, ctx); }
+STAGE(table_g) { g = table(g, ctx); }
+STAGE(table_b) { b = table(b, ctx); }
+STAGE(table_a) { a = table(a, ctx); }
+
 STAGE(load_a8) {
     auto ptr = *(const uint8_t**)ctx + x;