Reland "Respect full precision for RGB16 PNGs" (part 2)

This lands all the new xform hooks but no change to src/codec.
So the new decode features are turned off.

I'm relanding this in pieces to try to bisect a
strange MSAN error.

Original CL:
https://skia-review.googlesource.com/c/7085/

BUG=skia:

CQ_INCLUDE_TRYBOTS=skia.primary:Test-Ubuntu-Clang-GCE-CPU-AVX2-x86_64-Debug-MSAN,Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD,Build-Ubuntu-Clang-x86_64-Release-Fast


Change-Id: I451a2a29c73ca475e9e7a5ded58d4948d6b8be19
Reviewed-on: https://skia-review.googlesource.com/7277
Reviewed-by: Matt Sarett <msarett@google.com>
Commit-Queue: Matt Sarett <msarett@google.com>

1 files changed, 22 insertions, 1 deletions

diff --git a/src/core/SkColorSpaceXform.cpp b/src/core/SkColorSpaceXform.cpp
index bdb3784681..dccb92ee9a 100644
--- a/src/core/SkColorSpaceXform.cpp
+++ b/src/core/SkColorSpaceXform.cpp
@@ -1104,7 +1104,10 @@ bool SkColorSpaceXform_XYZ<kCSM>
         }
     }
 
-    if (kRGBA_F32_ColorFormat == dstColorFormat || kRGBA_U16_BE_ColorFormat == srcColorFormat) {
+    if (kRGBA_F32_ColorFormat == dstColorFormat ||
+        kRGBA_U16_BE_ColorFormat == srcColorFormat ||
+        kRGB_U16_BE_ColorFormat == srcColorFormat)
+    {
         return this->applyPipeline(dstColorFormat, dst, srcColorFormat, src, len, alphaType);
     }
 
@@ -1221,6 +1224,24 @@ bool SkColorSpaceXform_XYZ<kCSM>
                     break;
             }
             break;
+        case kRGB_U16_BE_ColorFormat:
+            switch (fSrcGamma) {
+                case kLinear_SrcGamma:
+                    pipeline.append(SkRasterPipeline::load_rgb_u16_be, &src);
+                    break;
+                case kSRGB_SrcGamma:
+                    pipeline.append(SkRasterPipeline::load_rgb_u16_be, &src);
+                    pipeline.append_from_srgb(kUnpremul_SkAlphaType);
+                    break;
+                case kTable_SrcGamma:
+                    loadTables.fSrc = src;
+                    loadTables.fR = fSrcGammaTables[0];
+                    loadTables.fG = fSrcGammaTables[1];
+                    loadTables.fB = fSrcGammaTables[2];
+                    pipeline.append(SkRasterPipeline::load_tables_rgb_u16_be, &loadTables);
+                    break;
+            }
+            break;
         default:
             return false;
     }