/* -*- c++ -*- */
/*
* Copyright © 2009 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#pragma once
#ifndef GLSL_TYPES_H
#define GLSL_TYPES_H
#include <string.h>
#include <assert.h>
#include "main/mtypes.h" /* for gl_texture_index, C++'s enum rules are broken */
#ifdef __cplusplus
extern "C" {
#endif
struct _mesa_glsl_parse_state;
struct glsl_symbol_table;
extern void
_mesa_glsl_initialize_types(struct _mesa_glsl_parse_state *state);
extern void
_mesa_glsl_release_types(void);
#ifdef __cplusplus
}
#endif
enum glsl_base_type {
GLSL_TYPE_UINT = 0,
GLSL_TYPE_INT,
GLSL_TYPE_FLOAT,
GLSL_TYPE_BOOL,
GLSL_TYPE_SAMPLER,
GLSL_TYPE_STRUCT,
GLSL_TYPE_INTERFACE,
GLSL_TYPE_ARRAY,
GLSL_TYPE_VOID,
GLSL_TYPE_ERROR
};
enum glsl_sampler_dim {
GLSL_SAMPLER_DIM_1D = 0,
GLSL_SAMPLER_DIM_2D,
GLSL_SAMPLER_DIM_3D,
GLSL_SAMPLER_DIM_CUBE,
GLSL_SAMPLER_DIM_RECT,
GLSL_SAMPLER_DIM_BUF,
GLSL_SAMPLER_DIM_EXTERNAL,
GLSL_SAMPLER_DIM_MS
};
enum glsl_interface_packing {
GLSL_INTERFACE_PACKING_STD140,
GLSL_INTERFACE_PACKING_SHARED,
GLSL_INTERFACE_PACKING_PACKED
};
#ifdef __cplusplus
#include "GL/gl.h"
#include "ralloc.h"
struct glsl_type {
GLenum gl_type;
glsl_base_type base_type;
unsigned sampler_dimensionality:3; /**< \see glsl_sampler_dim */
unsigned sampler_shadow:1;
unsigned sampler_array:1;
unsigned sampler_type:2; /**< Type of data returned using this sampler.
* only \c GLSL_TYPE_FLOAT, \c GLSL_TYPE_INT,
* and \c GLSL_TYPE_UINT are valid.
*/
unsigned interface_packing:2;
/* Callers of this ralloc-based new need not call delete. It's
* easier to just ralloc_free 'mem_ctx' (or any of its ancestors). */
static void* operator new(size_t size)
{
if (glsl_type::mem_ctx == NULL) {
glsl_type::mem_ctx = ralloc_context(NULL);
assert(glsl_type::mem_ctx != NULL);
}
void *type;
type = ralloc_size(glsl_type::mem_ctx, size);
assert(type != NULL);
return type;
}
/* If the user *does* call delete, that's OK, we will just
* ralloc_free in that case. */
static void operator delete(void *type)
{
ralloc_free(type);
}
/**
* \name Vector and matrix element counts
*
* For scalars, each of these values will be 1. For non-numeric types
* these will be 0.
*/
/*@{*/
unsigned vector_elements:3; /**< 1, 2, 3, or 4 vector elements. */
unsigned matrix_columns:3; /**< 1, 2, 3, or 4 matrix columns. */
/*@}*/
/**
* Name of the data type
*
* Will never be \c NULL.
*/
const char *name;
/**
* For \c GLSL_TYPE_ARRAY, this is the length of the array. For
* \c GLSL_TYPE_STRUCT or \c GLSL_TYPE_INTERFACE, it is the number of
* elements in the structure and the number of values pointed to by
* \c fields.structure (below).
*/
unsigned length;
/**
* Subtype of composite data types.
*/
union {
const struct glsl_type *array; /**< Type of array elements. */
const struct glsl_type *parameters; /**< Parameters to function. */
struct glsl_struct_field *structure; /**< List of struct fields. */
} fields;
/**
* \name Pointers to various public type singletons
*/
/*@{*/
#undef DECL_TYPE
#define DECL_TYPE(NAME, ...) \
static const glsl_type *const NAME##_type;
#undef STRUCT_TYPE
#define STRUCT_TYPE(NAME) \
static const glsl_type *const struct_##NAME##_type;
#include "builtin_type_macros.h"
/*@}*/
/**
* Convenience accessors for vector types (shorter than get_instance()).
* @{
*/
static const glsl_type *vec(unsigned components);
static const glsl_type *ivec(unsigned components);
static const glsl_type *uvec(unsigned components);
static const glsl_type *bvec(unsigned components);
/**@}*/
/**
* For numeric and boolean derrived types returns the basic scalar type
*
* If the type is a numeric or boolean scalar, vector, or matrix type,
* this function gets the scalar type of the individual components. For
* all other types, including arrays of numeric or boolean types, the
* error type is returned.
*/
const glsl_type *get_base_type() const;
/**
* Get the basic scalar type which this type aggregates.
*
* If the type is a numeric or boolean scalar, vector, or matrix, or an
* array of any of those, this function gets the scalar type of the
* individual components. For structs and arrays of structs, this function
* returns the struct type. For samplers and arrays of samplers, this
* function returns the sampler type.
*/
const glsl_type *get_scalar_type() const;
/**
* Query the type of elements in an array
*
* \return
* Pointer to the type of elements in the array for array types, or \c NULL
* for non-array types.
*/
const glsl_type *element_type() const
{
return is_array() ? fields.array : NULL;
}
/**
* Get the instance of a built-in scalar, vector, or matrix type
*/
static const glsl_type *get_instance(unsigned base_type, unsigned rows,
unsigned columns);
/**
* Get the instance of an array type
*/
static const glsl_type *get_array_instance(const glsl_type *base,
unsigned elements);
/**
* Get the instance of a record type
*/
static const glsl_type *get_record_instance(const glsl_struct_field *fields,
unsigned num_fields,
const char *name);
/**
* Get the instance of an interface block type
*/
static const glsl_type *get_interface_instance(const glsl_struct_field *fields,
unsigned num_fields,
enum glsl_interface_packing packing,
const char *name);
/**
* Query the total number of scalars that make up a scalar, vector or matrix
*/
unsigned components() const
{
return vector_elements * matrix_columns;
}
/**
* Calculate the number of components slots required to hold this type
*
* This is used to determine how many uniform or varying locations a type
* might occupy.
*/
unsigned component_slots() const;
/**
* Alignment in bytes of the start of this type in a std140 uniform
* block.
*/
unsigned std140_base_alignment(bool row_major) const;
/** Size in bytes of this type in a std140 uniform block.
*
* Note that this is not GL_UNIFORM_SIZE (which is the number of
* elements in the array)
*/
unsigned std140_size(bool row_major) const;
/**
* \brief Can this type be implicitly converted to another?
*
* \return True if the types are identical or if this type can be converted
* to \c desired according to Section 4.1.10 of the GLSL spec.
*
* \verbatim
* From page 25 (31 of the pdf) of the GLSL 1.50 spec, Section 4.1.10
* Implicit Conversions:
*
* In some situations, an expression and its type will be implicitly
* converted to a different type. The following table shows all allowed
* implicit conversions:
*
* Type of expression | Can be implicitly converted to
* --------------------------------------------------
* int float
* uint
*
* ivec2 vec2
* uvec2
*
* ivec3 vec3
* uvec3
*
* ivec4 vec4
* uvec4
*
* There are no implicit array or structure conversions. For example,
* an array of int cannot be implicitly converted to an array of float.
* There are no implicit conversions between signed and unsigned
* integers.
* \endverbatim
*/
bool can_implicitly_convert_to(const glsl_type *desired) const;
/**
* Query whether or not a type is a scalar (non-vector and non-matrix).
*/
bool is_scalar() const
{
return (vector_elements == 1)
&& (base_type >= GLSL_TYPE_UINT)
&& (base_type <= GLSL_TYPE_BOOL);
}
/**
* Query whether or not a type is a vector
*/
bool is_vector() const
{
return (vector_elements > 1)
&& (matrix_columns == 1)
&& (base_type >= GLSL_TYPE_UINT)
&& (base_type <= GLSL_TYPE_BOOL);
}
/**
* Query whether or not a type is a matrix
*/
bool is_matrix() const
{
/* GLSL only has float matrices. */
return (matrix_columns > 1) && (base_type == GLSL_TYPE_FLOAT);
}
/**
* Query whether or not a type is a non-array numeric type
*/
bool is_numeric() const
{
return (base_type >= GLSL_TYPE_UINT) && (base_type <= GLSL_TYPE_FLOAT);
}
/**
* Query whether or not a type is an integral type
*/
bool is_integer() const
{
return (base_type == GLSL_TYPE_UINT) || (base_type == GLSL_TYPE_INT);
}
/**
* Query whether or not type is an integral type, or for struct and array
* types, contains an integral type.
*/
bool contains_integer() const;
/**
* Query whether or not a type is a float type
*/
bool is_float() const
{
return base_type == GLSL_TYPE_FLOAT;
}
/**
* Query whether or not a type is a non-array boolean type
*/
bool is_boolean() const
{
return base_type == GLSL_TYPE_BOOL;
}
/**
* Query whether or not a type is a sampler
*/
bool is_sampler() const
{
return base_type == GLSL_TYPE_SAMPLER;
}
/**
* Query whether or not type is a sampler, or for struct and array
* types, contains a sampler.
*/
bool contains_sampler() const;
/**
* Get the Mesa texture target index for a sampler type.
*/
gl_texture_index sampler_index() const;
/**
* Query whether or not a type is an array
*/
bool is_array() const
{
return base_type == GLSL_TYPE_ARRAY;
}
/**
* Query whether or not a type is a record
*/
bool is_record() const
{
return base_type == GLSL_TYPE_STRUCT;
}
/**
* Query whether or not a type is an interface
*/
bool is_interface() const
{
return base_type == GLSL_TYPE_INTERFACE;
}
/**
* Query whether or not a type is the void type singleton.
*/
bool is_void() const
{
return base_type == GLSL_TYPE_VOID;
}
/**
* Query whether or not a type is the error type singleton.
*/
bool is_error() const
{
return base_type == GLSL_TYPE_ERROR;
}
/**
* Query the full type of a matrix row
*
* \return
* If the type is not a matrix, \c glsl_type::error_type is returned.
* Otherwise a type matching the rows of the matrix is returned.
*/
const glsl_type *row_type() const
{
return is_matrix()
? get_instance(base_type, matrix_columns, 1)
: error_type;
}
/**
* Query the full type of a matrix column
*
* \return
* If the type is not a matrix, \c glsl_type::error_type is returned.
* Otherwise a type matching the columns of the matrix is returned.
*/
const glsl_type *column_type() const
{
return is_matrix()
? get_instance(base_type, vector_elements, 1)
: error_type;
}
/**
* Get the type of a structure field
*
* \return
* Pointer to the type of the named field. If the type is not a structure
* or the named field does not exist, \c glsl_type::error_type is returned.
*/
const glsl_type *field_type(const char *name) const;
/**
* Get the location of a filed within a record type
*/
int field_index(const char *name) const;
/**
* Query the number of elements in an array type
*
* \return
* The number of elements in the array for array types or -1 for non-array
* types. If the number of elements in the array has not yet been declared,
* zero is returned.
*/
int array_size() const
{
return is_array() ? length : -1;
}
private:
/**
* ralloc context for all glsl_type allocations
*
* Set on the first call to \c glsl_type::new.
*/
static void *mem_ctx;
void init_ralloc_type_ctx(void);
/** Constructor for vector and matrix types */
glsl_type(GLenum gl_type,
glsl_base_type base_type, unsigned vector_elements,
unsigned matrix_columns, const char *name);
/** Constructor for sampler types */
glsl_type(GLenum gl_type,
enum glsl_sampler_dim dim, bool shadow, bool array,
unsigned type, const char *name);
/** Constructor for record types */
glsl_type(const glsl_struct_field *fields, unsigned num_fields,
const char *name);
/** Constructor for interface types */
glsl_type(const glsl_struct_field *fields, unsigned num_fields,
enum glsl_interface_packing packing, const char *name);
/** Constructor for array types */
glsl_type(const glsl_type *array, unsigned length);
/** Hash table containing the known array types. */
static struct hash_table *array_types;
/** Hash table containing the known record types. */
static struct hash_table *record_types;
/** Hash table containing the known interface types. */
static struct hash_table *interface_types;
static int record_key_compare(const void *a, const void *b);
static unsigned record_key_hash(const void *key);
/**
* \name Built-in type flyweights
*/
/*@{*/
#undef DECL_TYPE
#define DECL_TYPE(NAME, ...) static const glsl_type _##NAME##_type;
#undef STRUCT_TYPE
#define STRUCT_TYPE(NAME) static const glsl_type _struct_##NAME##_type;
#include "builtin_type_macros.h"
/*@}*/
/**
* \name Friend functions.
*
* These functions are friends because they must have C linkage and the
* need to call various private methods or access various private static
* data.
*/
/*@{*/
friend void _mesa_glsl_initialize_types(struct _mesa_glsl_parse_state *);
friend void _mesa_glsl_release_types(void);
/*@}*/
};
struct glsl_struct_field {
const struct glsl_type *type;
const char *name;
bool row_major;
};
static inline unsigned int
glsl_align(unsigned int a, unsigned int align)
{
return (a + align - 1) / align * align;
}
#undef DECL_TYPE
#undef STRUCT_TYPE
#endif /* __cplusplus */
#endif /* GLSL_TYPES_H */