2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
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26 * \file prog_parameter.c
27 * Program parameter lists and functions.
32 #include "main/glheader.h"
33 #include "main/imports.h"
34 #include "main/macros.h"
35 #include "prog_instruction.h"
36 #include "prog_parameter.h"
37 #include "prog_statevars.h"
40 struct gl_program_parameter_list
*
41 _mesa_new_parameter_list(void)
43 return CALLOC_STRUCT(gl_program_parameter_list
);
47 struct gl_program_parameter_list
*
48 _mesa_new_parameter_list_sized(unsigned size
)
50 struct gl_program_parameter_list
*p
= _mesa_new_parameter_list();
52 if ((p
!= NULL
) && (size
!= 0)) {
56 p
->Parameters
= (struct gl_program_parameter
*)
57 calloc(1, size
* sizeof(struct gl_program_parameter
));
59 p
->ParameterValues
= (gl_constant_value (*)[4])
60 _mesa_align_malloc(size
* 4 *sizeof(gl_constant_value
), 16);
63 if ((p
->Parameters
== NULL
) || (p
->ParameterValues
== NULL
)) {
65 _mesa_align_free(p
->ParameterValues
);
76 * Free a parameter list and all its parameters
79 _mesa_free_parameter_list(struct gl_program_parameter_list
*paramList
)
82 for (i
= 0; i
< paramList
->NumParameters
; i
++) {
83 free((void *)paramList
->Parameters
[i
].Name
);
85 free(paramList
->Parameters
);
86 if (paramList
->ParameterValues
)
87 _mesa_align_free(paramList
->ParameterValues
);
93 * Add a new parameter to a parameter list.
94 * Note that parameter values are usually 4-element GLfloat vectors.
95 * When size > 4 we'll allocate a sequential block of parameters to
96 * store all the values (in blocks of 4).
98 * \param paramList the list to add the parameter to
99 * \param type type of parameter, such as
100 * \param name the parameter name, will be duplicated/copied!
101 * \param size number of elements in 'values' vector (1..4, or more)
102 * \param datatype GL_FLOAT, GL_FLOAT_VECx, GL_INT, GL_INT_VECx or GL_NONE.
103 * \param values initial parameter value, up to 4 gl_constant_values, or NULL
104 * \param state state indexes, or NULL
105 * \return index of new parameter in the list, or -1 if error (out of mem)
108 _mesa_add_parameter(struct gl_program_parameter_list
*paramList
,
109 gl_register_file type
, const char *name
,
110 GLuint size
, GLenum datatype
,
111 const gl_constant_value
*values
,
112 const gl_state_index state
[STATE_LENGTH
])
114 const GLuint oldNum
= paramList
->NumParameters
;
115 const GLuint sz4
= (size
+ 3) / 4; /* no. of new param slots needed */
119 if (oldNum
+ sz4
> paramList
->Size
) {
120 /* Need to grow the parameter list array (alloc some extra) */
121 paramList
->Size
= paramList
->Size
+ 4 * sz4
;
124 paramList
->Parameters
= (struct gl_program_parameter
*)
125 _mesa_realloc(paramList
->Parameters
,
126 oldNum
* sizeof(struct gl_program_parameter
),
127 paramList
->Size
* sizeof(struct gl_program_parameter
));
129 paramList
->ParameterValues
= (gl_constant_value (*)[4])
130 _mesa_align_realloc(paramList
->ParameterValues
, /* old buf */
131 oldNum
* 4 * sizeof(gl_constant_value
),/* old sz */
132 paramList
->Size
*4*sizeof(gl_constant_value
),/*new*/
136 if (!paramList
->Parameters
||
137 !paramList
->ParameterValues
) {
139 paramList
->NumParameters
= 0;
146 paramList
->NumParameters
= oldNum
+ sz4
;
148 memset(¶mList
->Parameters
[oldNum
], 0,
149 sz4
* sizeof(struct gl_program_parameter
));
151 for (i
= 0; i
< sz4
; i
++) {
152 struct gl_program_parameter
*p
= paramList
->Parameters
+ oldNum
+ i
;
153 p
->Name
= name
? _mesa_strdup(name
) : NULL
;
156 p
->DataType
= datatype
;
158 COPY_4V(paramList
->ParameterValues
[oldNum
+ i
], values
);
160 p
->Initialized
= GL_TRUE
;
163 /* silence valgrind */
164 for (j
= 0; j
< 4; j
++)
165 paramList
->ParameterValues
[oldNum
+ i
][j
].f
= 0;
171 for (i
= 0; i
< STATE_LENGTH
; i
++)
172 paramList
->Parameters
[oldNum
].StateIndexes
[i
] = state
[i
];
175 return (GLint
) oldNum
;
181 * Add a new named constant to the parameter list.
182 * This will be used when the program contains something like this:
183 * PARAM myVals = { 0, 1, 2, 3 };
185 * \param paramList the parameter list
186 * \param name the name for the constant
187 * \param values four float values
188 * \return index/position of the new parameter in the parameter list
191 _mesa_add_named_constant(struct gl_program_parameter_list
*paramList
,
192 const char *name
, const gl_constant_value values
[4],
195 /* first check if this is a duplicate constant */
197 for (pos
= 0; pos
< (GLint
)paramList
->NumParameters
; pos
++) {
198 const gl_constant_value
*pvals
= paramList
->ParameterValues
[pos
];
199 if (pvals
[0].u
== values
[0].u
&&
200 pvals
[1].u
== values
[1].u
&&
201 pvals
[2].u
== values
[2].u
&&
202 pvals
[3].u
== values
[3].u
&&
203 strcmp(paramList
->Parameters
[pos
].Name
, name
) == 0) {
204 /* Same name and value is already in the param list - reuse it */
208 /* not found, add new parameter */
209 return _mesa_add_parameter(paramList
, PROGRAM_CONSTANT
, name
,
210 size
, GL_NONE
, values
, NULL
);
215 * Add a new unnamed constant to the parameter list. This will be used
216 * when a fragment/vertex program contains something like this:
217 * MOV r, { 0, 1, 2, 3 };
218 * If swizzleOut is non-null we'll search the parameter list for an
219 * existing instance of the constant which matches with a swizzle.
221 * \param paramList the parameter list
222 * \param values four float values
223 * \param swizzleOut returns swizzle mask for accessing the constant
224 * \return index/position of the new parameter in the parameter list.
227 _mesa_add_typed_unnamed_constant(struct gl_program_parameter_list
*paramList
,
228 const gl_constant_value values
[4], GLuint size
,
229 GLenum datatype
, GLuint
*swizzleOut
)
236 _mesa_lookup_parameter_constant(paramList
, values
,
237 size
, &pos
, swizzleOut
)) {
241 /* Look for empty space in an already unnamed constant parameter
242 * to add this constant. This will only work for single-element
243 * constants because we rely on smearing (i.e. .yyyy or .zzzz).
245 if (size
== 1 && swizzleOut
) {
246 for (pos
= 0; pos
< (GLint
) paramList
->NumParameters
; pos
++) {
247 struct gl_program_parameter
*p
= paramList
->Parameters
+ pos
;
248 if (p
->Type
== PROGRAM_CONSTANT
&& p
->Size
+ size
<= 4) {
250 gl_constant_value
*pVal
= paramList
->ParameterValues
[pos
];
251 GLuint swz
= p
->Size
; /* 1, 2 or 3 for Y, Z, W */
252 pVal
[p
->Size
] = values
[0];
254 *swizzleOut
= MAKE_SWIZZLE4(swz
, swz
, swz
, swz
);
260 /* add a new parameter to store this constant */
261 pos
= _mesa_add_parameter(paramList
, PROGRAM_CONSTANT
, NULL
,
262 size
, datatype
, values
, NULL
);
263 if (pos
>= 0 && swizzleOut
) {
265 *swizzleOut
= SWIZZLE_XXXX
;
267 *swizzleOut
= SWIZZLE_NOOP
;
273 * Add a new unnamed constant to the parameter list. This will be used
274 * when a fragment/vertex program contains something like this:
275 * MOV r, { 0, 1, 2, 3 };
276 * If swizzleOut is non-null we'll search the parameter list for an
277 * existing instance of the constant which matches with a swizzle.
279 * \param paramList the parameter list
280 * \param values four float values
281 * \param swizzleOut returns swizzle mask for accessing the constant
282 * \return index/position of the new parameter in the parameter list.
283 * \sa _mesa_add_typed_unnamed_constant
286 _mesa_add_unnamed_constant(struct gl_program_parameter_list
*paramList
,
287 const gl_constant_value values
[4], GLuint size
,
290 return _mesa_add_typed_unnamed_constant(paramList
, values
, size
, GL_NONE
,
294 #if 0 /* not used yet */
296 * Returns the number of 4-component registers needed to store a piece
297 * of GL state. For matrices this may be as many as 4 registers,
298 * everything else needs
302 sizeof_state_reference(const GLint
*stateTokens
)
304 if (stateTokens
[0] == STATE_MATRIX
) {
305 GLuint rows
= stateTokens
[4] - stateTokens
[3] + 1;
318 * Add a new state reference to the parameter list.
319 * This will be used when the program contains something like this:
320 * PARAM ambient = state.material.front.ambient;
322 * \param paramList the parameter list
323 * \param stateTokens an array of 5 (STATE_LENGTH) state tokens
324 * \return index of the new parameter.
327 _mesa_add_state_reference(struct gl_program_parameter_list
*paramList
,
328 const gl_state_index stateTokens
[STATE_LENGTH
])
330 const GLuint size
= 4; /* XXX fix */
334 /* Check if the state reference is already in the list */
335 for (index
= 0; index
< (GLint
) paramList
->NumParameters
; index
++) {
336 if (!memcmp(paramList
->Parameters
[index
].StateIndexes
,
337 stateTokens
, STATE_LENGTH
* sizeof(gl_state_index
))) {
342 name
= _mesa_program_state_string(stateTokens
);
343 index
= _mesa_add_parameter(paramList
, PROGRAM_STATE_VAR
, name
,
345 NULL
, (gl_state_index
*) stateTokens
);
346 paramList
->StateFlags
|= _mesa_program_state_flags(stateTokens
);
348 /* free name string here since we duplicated it in add_parameter() */
356 * Lookup a parameter value by name in the given parameter list.
357 * \return pointer to the float[4] values.
360 _mesa_lookup_parameter_value(const struct gl_program_parameter_list
*paramList
,
361 GLsizei nameLen
, const char *name
)
363 GLint i
= _mesa_lookup_parameter_index(paramList
, nameLen
, name
);
367 return paramList
->ParameterValues
[i
];
372 * Given a program parameter name, find its position in the list of parameters.
373 * \param paramList the parameter list to search
374 * \param nameLen length of name (in chars).
375 * If length is negative, assume that name is null-terminated.
376 * \param name the name to search for
377 * \return index of parameter in the list.
380 _mesa_lookup_parameter_index(const struct gl_program_parameter_list
*paramList
,
381 GLsizei nameLen
, const char *name
)
389 /* name is null-terminated */
390 for (i
= 0; i
< (GLint
) paramList
->NumParameters
; i
++) {
391 if (paramList
->Parameters
[i
].Name
&&
392 strcmp(paramList
->Parameters
[i
].Name
, name
) == 0)
397 /* name is not null-terminated, use nameLen */
398 for (i
= 0; i
< (GLint
) paramList
->NumParameters
; i
++) {
399 if (paramList
->Parameters
[i
].Name
&&
400 strncmp(paramList
->Parameters
[i
].Name
, name
, nameLen
) == 0
401 && strlen(paramList
->Parameters
[i
].Name
) == (size_t)nameLen
)
410 * Look for a float vector in the given parameter list. The float vector
411 * may be of length 1, 2, 3 or 4. If swizzleOut is non-null, we'll try
412 * swizzling to find a match.
413 * \param list the parameter list to search
414 * \param v the float vector to search for
415 * \param vSize number of element in v
416 * \param posOut returns the position of the constant, if found
417 * \param swizzleOut returns a swizzle mask describing location of the
418 * vector elements if found.
419 * \return GL_TRUE if found, GL_FALSE if not found
422 _mesa_lookup_parameter_constant(const struct gl_program_parameter_list
*list
,
423 const gl_constant_value v
[], GLuint vSize
,
424 GLint
*posOut
, GLuint
*swizzleOut
)
436 for (i
= 0; i
< list
->NumParameters
; i
++) {
437 if (list
->Parameters
[i
].Type
== PROGRAM_CONSTANT
) {
439 /* swizzle not allowed */
441 for (j
= 0; j
< vSize
; j
++) {
442 if (v
[j
].u
== list
->ParameterValues
[i
][j
].u
)
445 if (match
== vSize
) {
451 /* try matching w/ swizzle */
453 /* look for v[0] anywhere within float[4] value */
455 for (j
= 0; j
< list
->Parameters
[i
].Size
; j
++) {
456 if (list
->ParameterValues
[i
][j
].u
== v
[0].u
) {
459 *swizzleOut
= MAKE_SWIZZLE4(j
, j
, j
, j
);
464 else if (vSize
<= list
->Parameters
[i
].Size
) {
465 /* see if we can match this constant (with a swizzle) */
467 GLuint match
= 0, j
, k
;
468 for (j
= 0; j
< vSize
; j
++) {
469 if (v
[j
].u
== list
->ParameterValues
[i
][j
].u
) {
474 for (k
= 0; k
< list
->Parameters
[i
].Size
; k
++) {
475 if (v
[j
].u
== list
->ParameterValues
[i
][k
].u
) {
483 /* smear last value to remaining positions */
487 if (match
== vSize
) {
489 *swizzleOut
= MAKE_SWIZZLE4(swz
[0], swz
[1], swz
[2], swz
[3]);
502 struct gl_program_parameter_list
*
503 _mesa_clone_parameter_list(const struct gl_program_parameter_list
*list
)
505 struct gl_program_parameter_list
*clone
;
508 clone
= _mesa_new_parameter_list();
512 /** Not too efficient, but correct */
513 for (i
= 0; i
< list
->NumParameters
; i
++) {
514 struct gl_program_parameter
*p
= list
->Parameters
+ i
;
515 struct gl_program_parameter
*pCopy
;
516 GLuint size
= MIN2(p
->Size
, 4);
517 GLint j
= _mesa_add_parameter(clone
, p
->Type
, p
->Name
, size
, p
->DataType
,
518 list
->ParameterValues
[i
], NULL
);
520 pCopy
= clone
->Parameters
+ j
;
521 /* copy state indexes */
522 if (p
->Type
== PROGRAM_STATE_VAR
) {
524 for (k
= 0; k
< STATE_LENGTH
; k
++) {
525 pCopy
->StateIndexes
[k
] = p
->StateIndexes
[k
];
529 clone
->Parameters
[j
].Size
= p
->Size
;
534 clone
->StateFlags
= list
->StateFlags
;
541 * Return a new parameter list which is listA + listB.
543 struct gl_program_parameter_list
*
544 _mesa_combine_parameter_lists(const struct gl_program_parameter_list
*listA
,
545 const struct gl_program_parameter_list
*listB
)
547 struct gl_program_parameter_list
*list
;
550 list
= _mesa_clone_parameter_list(listA
);
553 for (i
= 0; i
< listB
->NumParameters
; i
++) {
554 struct gl_program_parameter
*param
= listB
->Parameters
+ i
;
555 _mesa_add_parameter(list
, param
->Type
, param
->Name
, param
->Size
,
557 listB
->ParameterValues
[i
],
558 param
->StateIndexes
);
563 list
= _mesa_clone_parameter_list(listB
);