| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef GrGLSL_DEFINED |
| #define GrGLSL_DEFINED |
| |
| #include "GrTypesPriv.h" |
| #include "SkString.h" |
| |
| class GrShaderCaps; |
| |
| // Limited set of GLSL versions we build shaders for. Caller should round |
| // down the GLSL version to one of these enums. |
| enum GrGLSLGeneration { |
| /** |
| * Desktop GLSL 1.10 and ES2 shading language (based on desktop GLSL 1.20) |
| */ |
| k110_GrGLSLGeneration, |
| /** |
| * Desktop GLSL 1.30 |
| */ |
| k130_GrGLSLGeneration, |
| /** |
| * Desktop GLSL 1.40 |
| */ |
| k140_GrGLSLGeneration, |
| /** |
| * Desktop GLSL 1.50 |
| */ |
| k150_GrGLSLGeneration, |
| /** |
| * Desktop GLSL 3.30, and ES GLSL 3.00 |
| */ |
| k330_GrGLSLGeneration, |
| /** |
| * Desktop GLSL 4.00 |
| */ |
| k400_GrGLSLGeneration, |
| /** |
| * Desktop GLSL 4.20 |
| */ |
| k420_GrGLSLGeneration, |
| /** |
| * ES GLSL 3.10 only TODO Make GLSLCap objects to make this more granular |
| */ |
| k310es_GrGLSLGeneration, |
| /** |
| * ES GLSL 3.20 |
| */ |
| k320es_GrGLSLGeneration, |
| }; |
| |
| bool GrGLSLSupportsNamedFragmentShaderOutputs(GrGLSLGeneration); |
| |
| /** |
| * Adds a line of GLSL code to declare the default precision for float types. |
| */ |
| void GrGLSLAppendDefaultFloatPrecisionDeclaration(GrSLPrecision, |
| const GrShaderCaps&, |
| SkString* out); |
| |
| /** |
| * Converts a GrSLPrecision to its corresponding GLSL precision qualifier. |
| */ |
| static inline const char* GrGLSLPrecisionString(GrSLPrecision p) { |
| switch (p) { |
| case kLow_GrSLPrecision: |
| return "lowp"; |
| case kMedium_GrSLPrecision: |
| return "mediump"; |
| case kHigh_GrSLPrecision: |
| return "highp"; |
| case kDefault_GrSLPrecision: |
| return ""; |
| default: |
| SK_ABORT("Unexpected precision type."); |
| return ""; |
| } |
| } |
| |
| /** |
| * Converts a GrSLType to a string containing the name of the equivalent GLSL type. |
| */ |
| const char* GrGLSLTypeString(const GrShaderCaps* shaderCaps, GrSLType t); |
| |
| #endif |