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, 11 insertions, 1 deletions

diff --git a/src/sksl/SkSLContext.h b/src/sksl/SkSLContext.h
index 9289edeee5..6284c21a9a 100644
--- a/src/sksl/SkSLContext.h
+++ b/src/sksl/SkSLContext.h
@@ -88,6 +88,13 @@ public:
     , fImage2D_Type(new Type(SkString("image2D"), SpvDim2D, false, false, false, true))
     , fIImage2D_Type(new Type(SkString("iimage2D"), SpvDim2D, false, false, false, true))
 
+    // FIXME express these as "gsubpassInput" that expand to subpassInput, isubpassInput,
+    // and usubpassInput.
+    , fSubpassInput_Type(new Type(SkString("subpassInput"), SpvDimSubpassData, false, false,
+                                           false, false))
+    , fSubpassInputMS_Type(new Type(SkString("subpassInputMS"), SpvDimSubpassData, false, false,
+                                             true, false))
+
     // FIXME figure out what we're supposed to do with the gsampler et al. types)
     , fGSampler1D_Type(new Type(SkString("$gsampler1D"), static_type(*fSampler1D_Type)))
     , fGSampler2D_Type(new Type(SkString("$gsampler2D"), static_type(*fSampler2D_Type)))
@@ -137,7 +144,7 @@ public:
     , fDefined_Expression(new Defined(*fInvalid_Type)) {}
 
     static std::vector<const Type*> static_type(const Type& t) {
-        return { &t, &t, &t, &t };   
+        return { &t, &t, &t, &t };
     }
 
     const std::unique_ptr<Type> fInvalid_Type;
@@ -214,6 +221,9 @@ public:
     const std::unique_ptr<Type> fImage2D_Type;
     const std::unique_ptr<Type> fIImage2D_Type;
 
+    const std::unique_ptr<Type> fSubpassInput_Type;
+    const std::unique_ptr<Type> fSubpassInputMS_Type;
+
     const std::unique_ptr<Type> fGSampler1D_Type;
     const std::unique_ptr<Type> fGSampler2D_Type;
     const std::unique_ptr<Type> fGSampler3D_Type;