Add parser support for texture rectangle types

ast.h

@@ -326,10 +326,12 @@ enum ast_types {
    ast_mat4,
    ast_sampler1d,
    ast_sampler2d,
+   ast_sampler2drect,
    ast_sampler3d,
    ast_samplercube,
    ast_sampler1dshadow,
    ast_sampler2dshadow,
+   ast_sampler2drectshadow,
    ast_samplercubeshadow,
    ast_sampler1darray,
    ast_sampler2darray,

ast_type.cpp

@@ -78,10 +78,12 @@ ast_type_specifier::ast_type_specifier(int specifier)
       "mat4",
       "sampler1D",
       "sampler2D",
+      "sampler2DRect",
       "sampler3D",
       "samplerCube",
       "sampler1DShadow",
       "sampler2DShadow",
+      "sampler2DRectShadow",
       "samplerCubeShadow",
       "sampler1DArray",
       "sampler2DArray",

glsl_parser.ypp

@@ -900,10 +900,12 @@ basic_type_specifier_nonarray:
 	| MAT4X4		{ $$ = ast_mat4; }
 	| SAMPLER1D		{ $$ = ast_sampler1d; }
 	| SAMPLER2D		{ $$ = ast_sampler2d; }
+	| SAMPLER2DRECT		{ $$ = ast_sampler2drect; }
 	| SAMPLER3D		{ $$ = ast_sampler3d; }
 	| SAMPLERCUBE		{ $$ = ast_samplercube; }
 	| SAMPLER1DSHADOW	{ $$ = ast_sampler1dshadow; }
 	| SAMPLER2DSHADOW	{ $$ = ast_sampler2dshadow; }
+	| SAMPLER2DRECTSHADOW	{ $$ = ast_sampler2drectshadow; }
 	| SAMPLERCUBESHADOW	{ $$ = ast_samplercubeshadow; }
 	| SAMPLER1DARRAY	{ $$ = ast_sampler1darray; }
 	| SAMPLER2DARRAY	{ $$ = ast_sampler2darray; }