Implement EXT_shadow_samplers

Bug: angleproject:4863,b/161716126
Change-Id: I6beb45d91f59a851787c9f40b40266fb985198d5
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2288330
Commit-Queue: Geoff Lang <[email protected]>
Reviewed-by: Tim Van Patten <[email protected]>
Reviewed-by: back sept 10 - Jamie Madill <[email protected]>

Author: vonture

include/GLSLANG/ShaderLang.h

@@ -405,6 +405,7 @@ struct ShBuiltInResources
     int APPLE_clip_distance;
     int OES_texture_cube_map_array;
     int EXT_texture_cube_map_array;
+    int EXT_shadow_samplers;
 
     // Set to 1 to enable replacing GL_EXT_draw_buffers #extension directives
     // with GL_NV_draw_buffers in ESSL output. This flag can be used to emulate

scripts/code_generation_hashes/ANGLE_shader_translator.json

@@ -4,11 +4,11 @@
   "src/compiler/translator/generate_parser.py":
     "566178ecdfae3a29803b3687fc518ebb",
   "src/compiler/translator/glslang.l":
-    "5af9feeb7ba8549265f8d19ec7f43343",
+    "27b1e8d59a04bbaec10fac5688a67602",
   "src/compiler/translator/glslang.y":
     "1619aa1587a5fae94df9d143af732b77",
   "src/compiler/translator/glslang_lex_autogen.cpp":
-    "4b94107e3314432cfdc8f9e90909e5a0",
+    "ca9edf3f6882bdf9ac60dab16e8fb994",
   "src/compiler/translator/glslang_tab_autogen.cpp":
     "fc0ab4cb3179dc0d936ed9d56bb2dbd0",
   "src/compiler/translator/glslang_tab_autogen.h":

scripts/code_generation_hashes/Static_builtins.json

@@ -1,30 +1,30 @@
 {
   "src/compiler/translator/ImmutableString_ESSL_autogen.cpp":
-    "0ea93a3bc04293f610fdbfae45f8e436",
+    "a9a7d0620a2db1e80f8a370b523eeae5",
   "src/compiler/translator/ImmutableString_autogen.cpp":
-    "f3b0095f9f8669520698c845085ab62e",
+    "afe7aec06ab49afc91a1ba25db0a3bce",
   "src/compiler/translator/ParseContext_ESSL_autogen.h":
-    "45035f9e1e7cd735476fc250e034bc72",
+    "4da3f648f61218602aff76296103e0f2",
   "src/compiler/translator/ParseContext_complete_autogen.h":
-    "d116f43b2e3b61a73b26b301be561e0b",
+    "272d913f6a057fe1ebce884a6bd2bb73",
   "src/compiler/translator/SymbolTable_ESSL_autogen.cpp":
-    "6f3e49f813ca1fa93de47514b3390dfe",
+    "017b7c00d55b9ec4edf084e87847f1d9",
   "src/compiler/translator/SymbolTable_autogen.cpp":
-    "912d1ec634bf4178d310de6db46066f3",
+    "ef071b17834742f56397bc63d531bb5f",
   "src/compiler/translator/SymbolTable_autogen.h":
     "2d8bed6ff5debc6546199a2add316a66",
   "src/compiler/translator/builtin_function_declarations.txt":
-    "52e0dd28d8be3a0430b70c23d2b060aa",
+    "dc84b6c5fc78d9da23204d72574dd682",
   "src/compiler/translator/builtin_variables.json":
     "98d347a6ed181eca3d89bfd73193d787",
   "src/compiler/translator/gen_builtin_symbols.py":
     "ef6fde209ca86ffb1752fc3a5b9d72d7",
   "src/compiler/translator/tree_util/BuiltIn_ESSL_autogen.h":
-    "2ca793d3326d9e39e7d4ffbca7041e52",
+    "fa72b4b824dd85feeda5f984866a017f",
   "src/compiler/translator/tree_util/BuiltIn_complete_autogen.h":
-    "f3713a80fc4ffee53ba4992cc275d5b7",
+    "c3f43a7fafcf0bad43178be1a7da5d0f",
   "src/tests/compiler_tests/ImmutableString_test_ESSL_autogen.cpp":
-    "14cbdec9c41ae4a27910347b2c5e59ef",
+    "1f48b488c4e436833f5341ce1ad95f15",
   "src/tests/compiler_tests/ImmutableString_test_autogen.cpp":
-    "d368befd9e4c194c5f6b987b3628a184"
+    "aeacada0c801b923edefe3a74fc16285"
 }

src/compiler/fuzz/translator_fuzzer.cpp

@@ -165,6 +165,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
         resources.MaxDualSourceDrawBuffers        = 1;
         resources.EXT_gpu_shader5                 = 1;
         resources.MaxClipDistances                = 1;
+        resources.EXT_shadow_samplers             = 1;
 
         if (!translator->Init(resources))
         {

src/compiler/translator/Compiler.cpp

@@ -1089,6 +1089,7 @@ void TCompiler::setResourceString()
         << ":APPLE_clip_distance:" << mResources.APPLE_clip_distance
         << ":OES_texture_cube_map_array:" << mResources.OES_texture_cube_map_array
         << ":EXT_texture_cube_map_array:" << mResources.EXT_texture_cube_map_array
+        << ":EXT_shadow_samplers:" << mResources.EXT_shadow_samplers
         << ":MinProgramTextureGatherOffset:" << mResources.MinProgramTextureGatherOffset
         << ":MaxProgramTextureGatherOffset:" << mResources.MaxProgramTextureGatherOffset
         << ":MaxImageUnits:" << mResources.MaxImageUnits

src/compiler/translator/ExtensionBehavior.cpp

@@ -40,7 +40,8 @@
     OP(WEBGL_video_texture)                         \
     OP(APPLE_clip_distance)                         \
     OP(OES_texture_cube_map_array)                  \
-    OP(EXT_texture_cube_map_array)
+    OP(EXT_texture_cube_map_array)                  \
+    OP(EXT_shadow_samplers)
 
 namespace sh
 {

src/compiler/translator/ExtensionBehavior.h

@@ -47,6 +47,7 @@ enum class TExtension : uint8_t
     APPLE_clip_distance,
     OES_texture_cube_map_array,
     EXT_texture_cube_map_array,
+    EXT_shadow_samplers,
 };
 
 enum TBehavior : uint8_t

src/compiler/translator/ImmutableString_ESSL_autogen.cpp

@@ -125,6 +125,10 @@ void InitExtensionBehavior(const ShBuiltInResources &resources, TExtensionBehavi
     {
         extBehavior[TExtension::EXT_texture_cube_map_array] = EBhUndefined;
     }
+    if (resources.EXT_shadow_samplers)
+    {
+        extBehavior[TExtension::EXT_shadow_samplers] = EBhUndefined;
+    }
 }
 
 void ResetExtensionBehavior(const ShBuiltInResources &resources,