commit 1acf438b9b54330a46087d730de24f5958497348
author Cooper Partin <coopp@microsoft.com> Fri Jun 12 12:38:57 2015 -0700
committer Jamie Madill <jmadill@chromium.org> Mon Jun 22 20:23:55 2015 +0000
tree 9261413a6af7722c20be8a9951d9bc3e9cb4044c
parent a0b8a41c61b1ee3cc41adb332fca14175c65f9ff

Added define to enable/disable uniform precision validation for shaders.
This feature was requested by developers to allow non-conformant shaders
to be used which contain mismatched precisions.

Change-Id: I57899efe064f7ffed1c0e43a508930ac70f6aa03
Reviewed-on: https://chromium-review.googlesource.com/277340
Tested-by: Cooper Partin <coopp@microsoft.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

src/libANGLE/Program.cpp

diff --git a/src/libANGLE/Program.cpp b/src/libANGLE/Program.cpp
index dd5ec95..cb748c0 100644
--- a/src/libANGLE/Program.cpp
+++ b/src/libANGLE/Program.cpp
@@ -1533,7 +1533,13 @@
 
 bool Program::linkValidateUniforms(InfoLog &infoLog, const std::string &uniformName, const sh::Uniform &vertexUniform, const sh::Uniform &fragmentUniform)
 {
-    if (!linkValidateVariablesBase(infoLog, uniformName, vertexUniform, fragmentUniform, true))
+#if ANGLE_PROGRAM_LINK_VALIDATE_UNIFORM_PRECISION == ANGLE_ENABLED
+    const bool validatePrecision = true;
+#else
+    const bool validatePrecision = false;
+#endif
+
+    if (!linkValidateVariablesBase(infoLog, uniformName, vertexUniform, fragmentUniform, validatePrecision))
     {
         return false;
     }

src/libANGLE/features.h

diff --git a/src/libANGLE/features.h b/src/libANGLE/features.h
index fbe013f..64b6469 100644
--- a/src/libANGLE/features.h
+++ b/src/libANGLE/features.h
@@ -37,4 +37,13 @@
 #define ANGLE_SHADER_DEBUG_INFO ANGLE_DISABLED
 #endif
 
+// Program link validation of precisions for uniforms. This feature was
+// requested by developers to allow non-conformant shaders to be used which
+// contain mismatched precisions.
+// ENABLED validate that precision for uniforms match between vertex and fragment shaders
+// DISABLED allow precision for uniforms to differ between vertex and fragment shaders
+#if !defined(ANGLE_PROGRAM_LINK_VALIDATE_UNIFORM_PRECISION)
+#define ANGLE_PROGRAM_LINK_VALIDATE_UNIFORM_PRECISION ANGLE_ENABLED
+#endif
+
 #endif // LIBANGLE_FEATURES_H_