diff options
author | Brian Paul <brianp@vmware.com> | 2010-06-10 22:48:16 -0600 |
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committer | Brian Paul <brianp@vmware.com> | 2010-06-10 22:48:16 -0600 |
commit | f1c5043f94261fecd8a6e54fe37d786554affcdd (patch) | |
tree | 681dcd7ddafb3535629df2b3ccdaf693d1cfd5df /src/mesa/slang/slang_storage.h | |
parent | 7936e06657bc43de80ae4f56ee9db956e193d880 (diff) |
mesa: move shader/slang/* sources to main/slang/*
Reduce the source tree depth a bit.
Diffstat (limited to 'src/mesa/slang/slang_storage.h')
-rw-r--r-- | src/mesa/slang/slang_storage.h | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/src/mesa/slang/slang_storage.h b/src/mesa/slang/slang_storage.h new file mode 100644 index 0000000000..1876a36dd6 --- /dev/null +++ b/src/mesa/slang/slang_storage.h @@ -0,0 +1,139 @@ +/* + * Mesa 3-D graphics library + * Version: 6.5 + * + * Copyright (C) 2005-2006 Brian Paul All Rights Reserved. + * + * 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 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 + * BRIAN PAUL 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. + */ + +#ifndef SLANG_STORAGE_H +#define SLANG_STORAGE_H + +#include "slang_compile.h" + + +/* + * Program variable data storage is kept completely transparent to the + * front-end compiler. It is up to the back-end how the data is + * actually allocated. The slang_storage_type enum provides the basic + * information about how the memory is interpreted. This abstract + * piece of memory is called a data slot. A data slot of a particular + * type has a fixed size. + * + * For now, only the three basic types are supported, that is bool, + * int and float. Other built-in types like vector or matrix can + * easily be decomposed into a series of basic types. + * + * If the vec4 module is enabled, 4-component vectors of floats are + * used when possible. 4x4 matrices are constructed of 4 vec4 slots. + */ +typedef enum slang_storage_type_ +{ + /* core */ + SLANG_STORE_AGGREGATE, + SLANG_STORE_BOOL, + SLANG_STORE_INT, + SLANG_STORE_FLOAT, + /* vec4 */ + SLANG_STORE_VEC4 +} slang_storage_type; + + +/** + * The slang_storage_array structure groups data slots of the same + * type into an array. This array has a fixed length. Arrays are + * required to have a size equal to the sum of sizes of its + * elements. They are also required to support indirect + * addressing. That is, if B references first data slot in the array, + * S is the size of the data slot and I is the integral index that is + * not known at compile time, B+I*S references I-th data slot. + * + * This structure is also used to break down built-in data types that + * are not supported directly. Vectors, like vec3, are constructed + * from arrays of their basic types. Matrices are formed of an array + * of column vectors, which are in turn processed as other vectors. + */ +typedef struct slang_storage_array_ +{ + slang_storage_type type; + struct slang_storage_aggregate_ *aggregate; + GLuint length; +} slang_storage_array; + +GLboolean slang_storage_array_construct (slang_storage_array *); +GLvoid slang_storage_array_destruct (slang_storage_array *); + + +/** + * The slang_storage_aggregate structure relaxes the indirect + * addressing requirement for slang_storage_array + * structure. Aggregates are always accessed statically - its member + * addresses are well-known at compile time. For example, user-defined + * types are implemented as aggregates. Aggregates can collect data of + * a different type. + */ +typedef struct slang_storage_aggregate_ +{ + slang_storage_array *arrays; + GLuint count; +} slang_storage_aggregate; + +GLboolean slang_storage_aggregate_construct (slang_storage_aggregate *); +GLvoid slang_storage_aggregate_destruct (slang_storage_aggregate *); + + +extern GLboolean +_slang_aggregate_variable(slang_storage_aggregate *agg, + slang_type_specifier *spec, + GLuint array_len, + slang_function_scope *funcs, + slang_struct_scope *structs, + slang_variable_scope *vars, + slang_atom_pool *atoms); + +/* + * Returns the size (in machine units) of the given storage type. + * It is an error to pass-in SLANG_STORE_AGGREGATE. + * Returns 0 on error. + */ +extern GLuint +_slang_sizeof_type (slang_storage_type); + + +/** + * Returns total size (in machine units) of the given aggregate. + * Returns 0 on error. + */ +extern GLuint +_slang_sizeof_aggregate (const slang_storage_aggregate *); + + +#if 0 +/** + * Converts structured aggregate to a flat one, with arrays of generic + * type being one-element long. Returns GL_TRUE on success. Returns + * GL_FALSE otherwise. + */ +extern GLboolean +_slang_flatten_aggregate (slang_storage_aggregate *, + const slang_storage_aggregate *); + +#endif + +#endif /* SLANG_STORAGE_H */ |