Revert "Add support for image load to SkSL"

This reverts commit bd85a105ba7b3ee2008d20fb9281bfb47325ad0e.

Reason for revert: Needing to revert a dependent CL

Original change's description:
> Add support for image load to SkSL
> 
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4865
> 
> Change-Id: I4647e6b255946ced2b1b8cb05e62f0f5a8ad28b6
> Reviewed-on: https://skia-review.googlesource.com/4865
> Commit-Queue: Brian Salomon <bsalomon@google.com>
> Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
> 

TBR=bsalomon@google.com,ethannicholas@google.com,reviews@skia.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: I45932a53c606aadd645ee2b8264f08ad63429939
Reviewed-on: https://skia-review.googlesource.com/4892
Commit-Queue: Stan Iliev <stani@google.com>
Reviewed-by: Stan Iliev <stani@google.com>

1 files changed, 2 insertions, 67 deletions

diff --git a/src/sksl/ast/SkSLASTLayout.h b/src/sksl/ast/SkSLASTLayout.h
index e7bfd12056..2aec31e4df 100644
--- a/src/sksl/ast/SkSLASTLayout.h
+++ b/src/sksl/ast/SkSLASTLayout.h
@@ -19,68 +19,9 @@ namespace SkSL {
  * layout (location = 0) int x;
  */
 struct ASTLayout : public ASTNode {
-    // These are used by images in GLSL. We only support a subset of what GL supports.
-    enum class Format {
-        kUnspecified = -1,
-        kRGBA32F,
-        kR32F,
-        kRGBA16F,
-        kR16F,
-        kRGBA8,
-        kR8,
-        kRGBA8I,
-        kR8I,
-    };
-
-    static const char* FormatToStr(Format format) {
-        switch (format) {
-            case Format::kUnspecified:  return "";
-            case Format::kRGBA32F:      return "rgba32f";
-            case Format::kR32F:         return "r32f";
-            case Format::kRGBA16F:      return "rgba16f";
-            case Format::kR16F:         return "r16f";
-            case Format::kRGBA8:        return "rgba8";
-            case Format::kR8:           return "r8";
-            case Format::kRGBA8I:       return "rgba8i";
-            case Format::kR8I:          return "r8i";
-        }
-        SkFAIL("Unexpected format");
-        return "";
-    }
-
-    static bool ReadFormat(std::string str, Format* format) {
-        if (str == "rgba32f") {
-            *format = Format::kRGBA32F;
-            return true;
-        } else if (str == "r32f") {
-            *format = Format::kR32F;
-            return true;
-        } else if (str == "rgba16f") {
-            *format = Format::kRGBA16F;
-            return true;
-        } else if (str == "r16f") {
-            *format = Format::kR16F;
-            return true;
-        } else if (str == "rgba8") {
-            *format = Format::kRGBA8;
-            return true;
-        } else if (str == "r8") {
-            *format = Format::kR8;
-            return true;
-        } else if (str == "rgba8i") {
-            *format = Format::kRGBA8I;
-            return true;
-        } else if (str == "r8i") {
-            *format = Format::kR8I;
-            return true;
-        }
-        return false;
-    }
-
     // 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, bool pushConstant,
-              Format format)
+              bool overrideCoverage, bool blendSupportAllEquations, bool pushConstant)
     : fLocation(location)
     , fBinding(binding)
     , fIndex(index)
@@ -89,8 +30,7 @@ struct ASTLayout : public ASTNode {
     , fOriginUpperLeft(originUpperLeft)
     , fOverrideCoverage(overrideCoverage)
     , fBlendSupportAllEquations(blendSupportAllEquations)
-    , fPushConstant(pushConstant)
-    , fFormat(format) {}
+    , fPushConstant(pushConstant) {}
 
     std::string description() const {
         std::string result;
@@ -131,10 +71,6 @@ struct ASTLayout : public ASTNode {
             result += separator + "push_constant";
             separator = ", ";
         }
-        if (fFormat != Format::kUnspecified) {
-            result += separator + FormatToStr(fFormat);
-            separator = ", ";
-        }
         if (result.length() > 0) {
             result = "layout (" + result + ")";
         }
@@ -150,7 +86,6 @@ struct ASTLayout : public ASTNode {
     const bool fOverrideCoverage;
     const bool fBlendSupportAllEquations;
     const bool fPushConstant;
-    const Format fFormat;
 };
 
 } // namespace