Add support for input attachments in SkSL spirv

BUG=skia:

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=5115

Change-Id: I3e03a465a10c9aff62491d0f6e71105d1b650dab
Reviewed-on: https://skia-review.googlesource.com/5115
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>

1 files changed, 9 insertions, 2 deletions

diff --git a/src/sksl/ast/SkSLASTLayout.h b/src/sksl/ast/SkSLASTLayout.h
index cb7f3c175c..a77e8388ed 100644
--- a/src/sksl/ast/SkSLASTLayout.h
+++ b/src/sksl/ast/SkSLASTLayout.h
@@ -78,13 +78,15 @@ struct ASTLayout : public ASTNode {
     }
 
     // For int parameters, a -1 means no value
-    ASTLayout(int location, int binding, int index, int set, int builtin, bool originUpperLeft,
-              bool overrideCoverage, bool blendSupportAllEquations, Format format)
+    ASTLayout(int location, int binding, int index, int set, int builtin, int inputAttachmentIndex,
+              bool originUpperLeft, bool overrideCoverage, bool blendSupportAllEquations,
+              Format format)
     : fLocation(location)
     , fBinding(binding)
     , fIndex(index)
     , fSet(set)
     , fBuiltin(builtin)
+    , fInputAttachmentIndex(inputAttachmentIndex)
     , fOriginUpperLeft(originUpperLeft)
     , fOverrideCoverage(overrideCoverage)
     , fBlendSupportAllEquations(blendSupportAllEquations)
@@ -113,6 +115,10 @@ struct ASTLayout : public ASTNode {
             result += separator + "builtin = " + to_string(fBuiltin);
             separator = ", ";
         }
+        if (fInputAttachmentIndex >= 0) {
+            result += separator + "input_attachment_index = " + to_string(fBuiltin);
+            separator = ", ";
+        }
         if (fOriginUpperLeft) {
             result += separator + "origin_upper_left";
             separator = ", ";
@@ -140,6 +146,7 @@ struct ASTLayout : public ASTNode {
     const int fIndex;
     const int fSet;
     const int fBuiltin;
+    const int fInputAttachmentIndex;
     const bool fOriginUpperLeft;
     const bool fOverrideCoverage;
     const bool fBlendSupportAllEquations;