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| author | Julian de Bhal <julian.debhal@nokia.com> | 2009-10-12 04:18:51 (GMT) |
|---|---|---|
| committer | Julian de Bhal <julian.debhal@nokia.com> | 2009-10-12 04:18:51 (GMT) |
| commit | 52aef13521af2137db15ee878893f5c5150471e5 (patch) | |
| tree | ac6265f8621bd337e02db52d2f2a10d55265b3c1 | |
| parent | 44e41d17baa7519f309b8ca10df26ec61d8c2fc7 (diff) | |
| download | Qt-52aef13521af2137db15ee878893f5c5150471e5.zip Qt-52aef13521af2137db15ee878893f5c5150471e5.tar.gz Qt-52aef13521af2137db15ee878893f5c5150471e5.tar.bz2 | |
GL ES 2.0 Shader language compatibility
Add precision modifiers to variable declarations in glsl for GL ES 2.0
compatibility. Precision modifiers are optional, so GL 2.0 languages
will continue to parse unchanged.
rweather
| -rw-r--r-- | util/qlalr/examples/glsl/glsl-lex.l | 3 | ||||
| -rw-r--r-- | util/qlalr/examples/glsl/glsl.g | 58 |
2 files changed, 37 insertions, 24 deletions
diff --git a/util/qlalr/examples/glsl/glsl-lex.l b/util/qlalr/examples/glsl/glsl-lex.l index 2a4826d..b50a2e2 100644 --- a/util/qlalr/examples/glsl/glsl-lex.l +++ b/util/qlalr/examples/glsl/glsl-lex.l @@ -150,6 +150,9 @@ icst ({dec}|0{oct}*|0[xX]{hex}+) "while" { return WHILE; } "^=" { return XOR_ASSIGN; } "^" { return XOR_OP; } +"highp" { return HIGH_PRECISION; } +"mediump" { return MEDIUM_PRECISION; } +"lowp" { return LOW_PRECISION; } #[ \t]+[0-9]+.* { char *eptr = 0; diff --git a/util/qlalr/examples/glsl/glsl.g b/util/qlalr/examples/glsl/glsl.g index 44c24d8..3e825bc 100644 --- a/util/qlalr/examples/glsl/glsl.g +++ b/util/qlalr/examples/glsl/glsl.g @@ -132,6 +132,9 @@ %token XOR_ASSIGN %token XOR_OP %token ERROR +%token HIGH_PRECISION +%token MEDIUM_PRECISION +%token LOW_PRECISION %start translation_unit @@ -487,30 +490,37 @@ type_qualifier ::= ATTRIBUTE ; -- Vertex only. type_qualifier ::= VARYING ; type_qualifier ::= UNIFORM ; -type_specifier ::= VOID ; -type_specifier ::= FLOAT ; -type_specifier ::= INT ; -type_specifier ::= BOOL ; -type_specifier ::= VEC2 ; -type_specifier ::= VEC3 ; -type_specifier ::= VEC4 ; -type_specifier ::= BVEC2 ; -type_specifier ::= BVEC3 ; -type_specifier ::= BVEC4 ; -type_specifier ::= IVEC2 ; -type_specifier ::= IVEC3 ; -type_specifier ::= IVEC4 ; -type_specifier ::= MAT2 ; -type_specifier ::= MAT3 ; -type_specifier ::= MAT4 ; -type_specifier ::= SAMPLER1D ; -type_specifier ::= SAMPLER2D ; -type_specifier ::= SAMPLER3D ; -type_specifier ::= SAMPLERCUBE ; -type_specifier ::= SAMPLER1DSHADOW ; -type_specifier ::= SAMPLER2DSHADOW ; -type_specifier ::= struct_specifier ; -type_specifier ::= TYPE_NAME ; +type_specifier ::= type_specifier_no_prec ; +type_specifier ::= precision_qualifier type_specifier_no_prec ; + +type_specifier_no_prec ::= VOID ; +type_specifier_no_prec ::= FLOAT ; +type_specifier_no_prec ::= INT ; +type_specifier_no_prec ::= BOOL ; +type_specifier_no_prec ::= VEC2 ; +type_specifier_no_prec ::= VEC3 ; +type_specifier_no_prec ::= VEC4 ; +type_specifier_no_prec ::= BVEC2 ; +type_specifier_no_prec ::= BVEC3 ; +type_specifier_no_prec ::= BVEC4 ; +type_specifier_no_prec ::= IVEC2 ; +type_specifier_no_prec ::= IVEC3 ; +type_specifier_no_prec ::= IVEC4 ; +type_specifier_no_prec ::= MAT2 ; +type_specifier_no_prec ::= MAT3 ; +type_specifier_no_prec ::= MAT4 ; +type_specifier_no_prec ::= SAMPLER1D ; +type_specifier_no_prec ::= SAMPLER2D ; +type_specifier_no_prec ::= SAMPLER3D ; +type_specifier_no_prec ::= SAMPLERCUBE ; +type_specifier_no_prec ::= SAMPLER1DSHADOW ; +type_specifier_no_prec ::= SAMPLER2DSHADOW ; +type_specifier_no_prec ::= struct_specifier ; +type_specifier_no_prec ::= TYPE_NAME ; + +precision_qualifier ::= HIGH_PRECISION ; +precision_qualifier ::= MEDIUM_PRECISION ; +precision_qualifier ::= LOW_PRECISION ; struct_specifier ::= STRUCT IDENTIFIER LEFT_BRACE struct_declaration_list RIGHT_BRACE ; /. |