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      1 /*
      2  * Copyright 2011 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #include "GrShaderCaps.h"
      9 #include "SkString.h"
     10 #include "../private/GrGLSL.h"
     11 
     12 bool GrGLSLSupportsNamedFragmentShaderOutputs(GrGLSLGeneration gen) {
     13     switch (gen) {
     14         case k110_GrGLSLGeneration:
     15             return false;
     16         case k130_GrGLSLGeneration:
     17         case k140_GrGLSLGeneration:
     18         case k150_GrGLSLGeneration:
     19         case k330_GrGLSLGeneration:
     20         case k400_GrGLSLGeneration:
     21         case k420_GrGLSLGeneration:
     22         case k310es_GrGLSLGeneration:
     23         case k320es_GrGLSLGeneration:
     24             return true;
     25     }
     26     return false;
     27 }
     28 
     29 void GrGLSLAppendDefaultFloatPrecisionDeclaration(GrSLPrecision p,
     30                                                   const GrShaderCaps& shaderCaps,
     31                                                   SkString* out) {
     32     if (shaderCaps.usesPrecisionModifiers()) {
     33         switch (p) {
     34             case kHigh_GrSLPrecision:
     35                 out->append("precision highp float;\n");
     36                 break;
     37             case kMedium_GrSLPrecision:
     38                 out->append("precision mediump float;\n");
     39                 break;
     40             case kLow_GrSLPrecision:
     41                 out->append("precision lowp float;\n");
     42                 break;
     43             default:
     44                 SkFAIL("Unknown precision value.");
     45         }
     46     }
     47 }
     48