commit a5527071817d42ce35256e5398d94e6ff2701adb
author Andrei Volykhin <andrei.volykhin@gmail.com> Wed Mar 22 16:46:30 2017 +0300
committer Commit Bot <commit-bot@chromium.org> Wed Mar 22 20:50:14 2017 +0000
tree 4cc3809abb29cd66f9f3dc78a18435c78e269a45
parent c1ebf5bdaadc3cd1ff51a9a8b3ba611372bfa453

Add support for EXT_YUV_target

Add new sampler type "__samplerExternal2DY2YEXT"
to sample a YUV texture image and output color value
without any color conversion,
new additional type to specify color space standard formula and
built-in functions for yuv to rgb transformation.

Change-Id: I1780650fe84cd75191c1ca1e4118e89d585bfd92
Reviewed-on: https://chromium-review.googlesource.com/454697
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>

src/compiler/translator/Initialize.cpp

diff --git a/src/compiler/translator/Initialize.cpp b/src/compiler/translator/Initialize.cpp
index 1bad320..9abf7d3 100644
--- a/src/compiler/translator/Initialize.cpp
+++ b/src/compiler/translator/Initialize.cpp
@@ -391,6 +391,25 @@
                                   float4);
     }
 
+    if (resources.EXT_YUV_target)
+    {
+        const TType *samplerExternal2DY2YEXT = TCache::getType(EbtSamplerExternal2DY2YEXT);
+
+        symbolTable.insertBuiltIn(ESSL3_BUILTINS, "GL_EXT_YUV_target", float4, "texture",
+                                  samplerExternal2DY2YEXT, float2);
+        symbolTable.insertBuiltIn(ESSL3_BUILTINS, "GL_EXT_YUV_target", float4, "textureProj",
+                                  samplerExternal2DY2YEXT, float3);
+        symbolTable.insertBuiltIn(ESSL3_BUILTINS, "GL_EXT_YUV_target", float4, "textureProj",
+                                  samplerExternal2DY2YEXT, float4);
+
+        const TType *yuvCscStandardEXT = TCache::getType(EbtYuvCscStandardEXT);
+
+        symbolTable.insertBuiltIn(ESSL3_BUILTINS, "GL_EXT_YUV_target", float3, "rgb_2_yuv", float3,
+                                  yuvCscStandardEXT);
+        symbolTable.insertBuiltIn(ESSL3_BUILTINS, "GL_EXT_YUV_target", float3, "yuv_2_rgb", float3,
+                                  yuvCscStandardEXT);
+    }
+
     if (type == GL_FRAGMENT_SHADER)
     {
         symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "texture", gsampler2D, float2, float1);
@@ -413,6 +432,18 @@
             symbolTable.insertBuiltIn(ESSL3_BUILTINS, float4, "textureProj", samplerExternalOES,
                                       float4, float1);
         }
+
+        if (resources.EXT_YUV_target)
+        {
+            const TType *samplerExternal2DY2YEXT = TCache::getType(EbtSamplerExternal2DY2YEXT);
+
+            symbolTable.insertBuiltIn(ESSL3_BUILTINS, "GL_EXT_YUV_target", float4, "texture",
+                                      samplerExternal2DY2YEXT, float2, float1);
+            symbolTable.insertBuiltIn(ESSL3_BUILTINS, "GL_EXT_YUV_target", float4, "textureProj",
+                                      samplerExternal2DY2YEXT, float3, float1);
+            symbolTable.insertBuiltIn(ESSL3_BUILTINS, "GL_EXT_YUV_target", float4, "textureProj",
+                                      samplerExternal2DY2YEXT, float4, float1);
+        }
     }
 
     const TType *sampler2DShadow      = TCache::getType(EbtSampler2DShadow);
@@ -452,6 +483,14 @@
         symbolTable.insertBuiltIn(ESSL3_BUILTINS, int2, "textureSize", samplerExternalOES, int1);
     }
 
+    if (resources.EXT_YUV_target)
+    {
+        const TType *samplerExternal2DY2YEXT = TCache::getType(EbtSamplerExternal2DY2YEXT);
+
+        symbolTable.insertBuiltIn(ESSL3_BUILTINS, "GL_EXT_YUV_target", int2, "textureSize",
+                                  samplerExternal2DY2YEXT, int1);
+    }
+
     if (type == GL_FRAGMENT_SHADER)
     {
         symbolTable.insertBuiltInOp(ESSL3_BUILTINS, EOpDFdx, genType, genType);
@@ -532,6 +571,14 @@
                                   int1);
     }
 
+    if (resources.EXT_YUV_target)
+    {
+        const TType *samplerExternal2DY2YEXT = TCache::getType(EbtSamplerExternal2DY2YEXT);
+
+        symbolTable.insertBuiltIn(ESSL3_BUILTINS, "GL_EXT_YUV_target", float4, "texelFetch",
+                                  samplerExternal2DY2YEXT, int2, int1);
+    }
+
     symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "texelFetchOffset", gsampler2D, int2, int1,
                               int2);
     symbolTable.insertBuiltIn(ESSL3_BUILTINS, gvec4, "texelFetchOffset", gsampler3D, int3, int1,
@@ -906,6 +953,10 @@
         extBehavior["GL_OVR_multiview"]  = EBhUndefined;
         extBehavior["GL_OVR_multiview2"] = EBhUndefined;
     }
+    if (resources.EXT_YUV_target)
+    {
+        extBehavior["GL_EXT_YUV_target"] = EBhUndefined;
+    }
 }
 
 void ResetExtensionBehavior(TExtensionBehavior &extBehavior)