Revert "sksl fragment processor support"

This reverts commit ccf59917d3fe7aaf59de714acfbd0596503f324f.

Reason for revert: breaking iOS bots

Original change's description:
> sksl fragment processor support
> 
> Bug: skia:
> Change-Id: Ia3b0305c2b0c78074303831f628fb01852b90d34
> Reviewed-on: https://skia-review.googlesource.com/17843
> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
> Reviewed-by: Ben Wagner <benjaminwagner@google.com>
> Reviewed-by: Mike Klein <mtklein@google.com>

TBR=mtklein@google.com,benjaminwagner@google.com,ethannicholas@google.com

Change-Id: I0a33060c7c42c7b44c5c13d443ac42958291c2f1
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/20962
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>

1 files changed, 7 insertions, 61 deletions

diff --git a/src/sksl/SkSLMain.cpp b/src/sksl/SkSLMain.cpp
index ee868fb35e..1461bf9aae 100644
--- a/src/sksl/SkSLMain.cpp
+++ b/src/sksl/SkSLMain.cpp
@@ -5,28 +5,11 @@
  * found in the LICENSE file.
  */
 
+#include "stdio.h"
 #include <fstream>
 #include "SkSLCompiler.h"
 #include "SkSLFileOutputStream.h"
 
-// Given the path to a file (e.g. src/gpu/effects/GrFooFragmentProcessor.fp) and the expected
-// filename prefix and suffix (e.g. "Gr" and ".fp"), returns the "base name" of the
-// file (in this case, 'FooFragmentProcessor'). If no match, returns the empty string.
-static SkSL::String base_name(const char* fpPath, const char* prefix, const char* suffix) {
-    SkSL::String result;
-    const char* end = fpPath + strlen(fpPath);
-    const char* fileName = end;
-    // back up until we find a slash
-    while (fileName != fpPath && '/' != *(fileName - 1) && '\\' != *(fileName - 1)) {
-        --fileName;
-    }
-    if (!strncmp(fileName, prefix, strlen(prefix)) &&
-        !strncmp(end - strlen(suffix), suffix, strlen(suffix))) {
-        result.append(fileName + strlen(prefix), end - fileName - strlen(prefix) - strlen(suffix));
-    }
-    return result;
-}
-
 /**
  * Very simple standalone executable to facilitate testing.
  */
@@ -36,17 +19,15 @@ int main(int argc, const char** argv) {
         exit(1);
     }
     SkSL::Program::Kind kind;
-    String input(argv[1]);
-    if (input.endsWith(".vert")) {
+    size_t len = strlen(argv[1]);
+    if (len > 5 && !strcmp(argv[1] + strlen(argv[1]) - 5, ".vert")) {
         kind = SkSL::Program::kVertex_Kind;
-    } else if (input.endsWith(".frag")) {
+    } else if (len > 5 && !strcmp(argv[1] + strlen(argv[1]) - 5, ".frag")) {
         kind = SkSL::Program::kFragment_Kind;
-    } else if (input.endsWith(".geom")) {
+    } else if (len > 5 && !strcmp(argv[1] + strlen(argv[1]) - 5, ".geom")) {
         kind = SkSL::Program::kGeometry_Kind;
-    } else if (input.endsWith(".fp")) {
-        kind = SkSL::Program::kFragmentProcessor_Kind;
     } else {
-        printf("input filename must end in '.vert', '.frag', '.geom', or '.fp'\n");
+        printf("input filename must end in '.vert', '.frag', or '.geom'\n");
         exit(1);
     }
 
@@ -59,7 +40,6 @@ int main(int argc, const char** argv) {
         exit(2);
     }
     SkSL::Program::Settings settings;
-    settings.fArgs.insert(std::make_pair("gpImplementsDistanceVector", 1));
     SkSL::String name(argv[2]);
     if (name.endsWith(".spirv")) {
         SkSL::FileOutputStream out(argv[2]);
@@ -93,41 +73,7 @@ int main(int argc, const char** argv) {
             printf("error writing '%s'\n", argv[2]);
             exit(4);
         }
-    } else if (name.endsWith(".h")) {
-        SkSL::FileOutputStream out(argv[2]);
-        SkSL::Compiler compiler;
-        if (!out.isValid()) {
-            printf("error writing '%s'\n", argv[2]);
-            exit(4);
-        }
-        settings.fReplaceSettings = false;
-        std::unique_ptr<SkSL::Program> program = compiler.convertProgram(kind, text, settings);
-        if (!program || !compiler.toH(*program, base_name(argv[1], "Gr", ".fp"), out)) {
-            printf("%s", compiler.errorText().c_str());
-            exit(3);
-        }
-        if (!out.close()) {
-            printf("error writing '%s'\n", argv[2]);
-            exit(4);
-        }
-    } else if (name.endsWith(".cpp")) {
-        SkSL::FileOutputStream out(argv[2]);
-        SkSL::Compiler compiler;
-        if (!out.isValid()) {
-            printf("error writing '%s'\n", argv[2]);
-            exit(4);
-        }
-        settings.fReplaceSettings = false;
-        std::unique_ptr<SkSL::Program> program = compiler.convertProgram(kind, text, settings);
-        if (!program || !compiler.toCPP(*program, base_name(argv[1], "Gr", ".fp"), out)) {
-            printf("%s", compiler.errorText().c_str());
-            exit(3);
-        }
-        if (!out.close()) {
-            printf("error writing '%s'\n", argv[2]);
-            exit(4);
-        }
     } else {
-        printf("expected output filename to end with '.spirv', '.glsl', '.cpp', or '.h'");
+        printf("expected output filename to end with '.spirv' or '.glsl'");
     }
 }