2 * Mesa 3-D graphics library
4 * 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(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 _mesa_align_free(paramList
->ParameterValues
);
92 * Add a new parameter to a parameter list.
93 * Note that parameter values are usually 4-element GLfloat vectors.
94 * When size > 4 we'll allocate a sequential block of parameters to
95 * store all the values (in blocks of 4).
97 * \param paramList the list to add the parameter to
98 * \param type type of parameter, such as
99 * \param name the parameter name, will be duplicated/copied!
100 * \param size number of elements in 'values' vector (1..4, or more)
101 * \param datatype GL_FLOAT, GL_FLOAT_VECx, GL_INT, GL_INT_VECx or GL_NONE.
102 * \param values initial parameter value, up to 4 gl_constant_values, or NULL
103 * \param state state indexes, or NULL
104 * \return index of new parameter in the list, or -1 if error (out of mem)
107 _mesa_add_parameter(struct gl_program_parameter_list
*paramList
,
108 gl_register_file type
, const char *name
,
109 GLuint size
, GLenum datatype
,
110 const gl_constant_value
*values
,
111 const gl_state_index state
[STATE_LENGTH
])
113 const GLuint oldNum
= paramList
->NumParameters
;
114 const GLuint sz4
= (size
+ 3) / 4; /* no. of new param slots needed */
118 if (oldNum
+ sz4
> paramList
->Size
) {
119 /* Need to grow the parameter list array (alloc some extra) */
120 paramList
->Size
= paramList
->Size
+ 4 * sz4
;
123 paramList
->Parameters
= (struct gl_program_parameter
*)
124 realloc(paramList
->Parameters
,
125 paramList
->Size
* sizeof(struct gl_program_parameter
));
127 paramList
->ParameterValues
= (gl_constant_value (*)[4])
128 _mesa_align_realloc(paramList
->ParameterValues
, /* old buf */
129 oldNum
* 4 * sizeof(gl_constant_value
),/* old sz */
130 paramList
->Size
*4*sizeof(gl_constant_value
),/*new*/
134 if (!paramList
->Parameters
||
135 !paramList
->ParameterValues
) {
137 paramList
->NumParameters
= 0;
144 paramList
->NumParameters
= oldNum
+ sz4
;
146 memset(¶mList
->Parameters
[oldNum
], 0,
147 sz4
* sizeof(struct gl_program_parameter
));
149 for (i
= 0; i
< sz4
; i
++) {
150 struct gl_program_parameter
*p
= paramList
->Parameters
+ oldNum
+ i
;
151 p
->Name
= name
? _mesa_strdup(name
) : NULL
;
154 p
->DataType
= datatype
;
157 COPY_4V(paramList
->ParameterValues
[oldNum
+ i
], values
);
160 /* copy 1, 2 or 3 values */
161 GLuint remaining
= size
% 4;
162 assert(remaining
< 4);
163 for (j
= 0; j
< remaining
; j
++) {
164 paramList
->ParameterValues
[oldNum
+ i
][j
].f
= values
[j
].f
;
166 /* fill in remaining positions with zeros */
168 paramList
->ParameterValues
[oldNum
+ i
][j
].f
= 0.0f
;
172 p
->Initialized
= GL_TRUE
;
175 /* silence valgrind */
176 for (j
= 0; j
< 4; j
++)
177 paramList
->ParameterValues
[oldNum
+ i
][j
].f
= 0;
183 for (i
= 0; i
< STATE_LENGTH
; i
++)
184 paramList
->Parameters
[oldNum
].StateIndexes
[i
] = state
[i
];
187 return (GLint
) oldNum
;
193 * Add a new named constant to the parameter list.
194 * This will be used when the program contains something like this:
195 * PARAM myVals = { 0, 1, 2, 3 };
197 * \param paramList the parameter list
198 * \param name the name for the constant
199 * \param values four float values
200 * \return index/position of the new parameter in the parameter list
203 _mesa_add_named_constant(struct gl_program_parameter_list
*paramList
,
204 const char *name
, const gl_constant_value values
[4],
207 /* first check if this is a duplicate constant */
209 for (pos
= 0; pos
< (GLint
)paramList
->NumParameters
; pos
++) {
210 const gl_constant_value
*pvals
= paramList
->ParameterValues
[pos
];
211 if (pvals
[0].u
== values
[0].u
&&
212 pvals
[1].u
== values
[1].u
&&
213 pvals
[2].u
== values
[2].u
&&
214 pvals
[3].u
== values
[3].u
&&
215 strcmp(paramList
->Parameters
[pos
].Name
, name
) == 0) {
216 /* Same name and value is already in the param list - reuse it */
220 /* not found, add new parameter */
221 return _mesa_add_parameter(paramList
, PROGRAM_CONSTANT
, name
,
222 size
, GL_NONE
, values
, NULL
);
227 * Add a new unnamed constant to the parameter list. This will be used
228 * when a fragment/vertex program contains something like this:
229 * MOV r, { 0, 1, 2, 3 };
230 * If swizzleOut is non-null we'll search the parameter list for an
231 * existing instance of the constant which matches with a swizzle.
233 * \param paramList the parameter list
234 * \param values four float values
235 * \param swizzleOut returns swizzle mask for accessing the constant
236 * \return index/position of the new parameter in the parameter list.
239 _mesa_add_typed_unnamed_constant(struct gl_program_parameter_list
*paramList
,
240 const gl_constant_value values
[4], GLuint size
,
241 GLenum datatype
, GLuint
*swizzleOut
)
248 _mesa_lookup_parameter_constant(paramList
, values
,
249 size
, &pos
, swizzleOut
)) {
253 /* Look for empty space in an already unnamed constant parameter
254 * to add this constant. This will only work for single-element
255 * constants because we rely on smearing (i.e. .yyyy or .zzzz).
257 if (size
== 1 && swizzleOut
) {
258 for (pos
= 0; pos
< (GLint
) paramList
->NumParameters
; pos
++) {
259 struct gl_program_parameter
*p
= paramList
->Parameters
+ pos
;
260 if (p
->Type
== PROGRAM_CONSTANT
&& p
->Size
+ size
<= 4) {
262 gl_constant_value
*pVal
= paramList
->ParameterValues
[pos
];
263 GLuint swz
= p
->Size
; /* 1, 2 or 3 for Y, Z, W */
264 pVal
[p
->Size
] = values
[0];
266 *swizzleOut
= MAKE_SWIZZLE4(swz
, swz
, swz
, swz
);
272 /* add a new parameter to store this constant */
273 pos
= _mesa_add_parameter(paramList
, PROGRAM_CONSTANT
, NULL
,
274 size
, datatype
, values
, NULL
);
275 if (pos
>= 0 && swizzleOut
) {
277 *swizzleOut
= SWIZZLE_XXXX
;
279 *swizzleOut
= SWIZZLE_NOOP
;
285 * Add a new unnamed constant to the parameter list. This will be used
286 * when a fragment/vertex program contains something like this:
287 * MOV r, { 0, 1, 2, 3 };
288 * If swizzleOut is non-null we'll search the parameter list for an
289 * existing instance of the constant which matches with a swizzle.
291 * \param paramList the parameter list
292 * \param values four float values
293 * \param swizzleOut returns swizzle mask for accessing the constant
294 * \return index/position of the new parameter in the parameter list.
295 * \sa _mesa_add_typed_unnamed_constant
298 _mesa_add_unnamed_constant(struct gl_program_parameter_list
*paramList
,
299 const gl_constant_value values
[4], GLuint size
,
302 return _mesa_add_typed_unnamed_constant(paramList
, values
, size
, GL_NONE
,
306 #if 0 /* not used yet */
308 * Returns the number of 4-component registers needed to store a piece
309 * of GL state. For matrices this may be as many as 4 registers,
310 * everything else needs
314 sizeof_state_reference(const GLint
*stateTokens
)
316 if (stateTokens
[0] == STATE_MATRIX
) {
317 GLuint rows
= stateTokens
[4] - stateTokens
[3] + 1;
330 * Add a new state reference to the parameter list.
331 * This will be used when the program contains something like this:
332 * PARAM ambient = state.material.front.ambient;
334 * \param paramList the parameter list
335 * \param stateTokens an array of 5 (STATE_LENGTH) state tokens
336 * \return index of the new parameter.
339 _mesa_add_state_reference(struct gl_program_parameter_list
*paramList
,
340 const gl_state_index stateTokens
[STATE_LENGTH
])
342 const GLuint size
= 4; /* XXX fix */
346 /* Check if the state reference is already in the list */
347 for (index
= 0; index
< (GLint
) paramList
->NumParameters
; index
++) {
348 if (!memcmp(paramList
->Parameters
[index
].StateIndexes
,
349 stateTokens
, STATE_LENGTH
* sizeof(gl_state_index
))) {
354 name
= _mesa_program_state_string(stateTokens
);
355 index
= _mesa_add_parameter(paramList
, PROGRAM_STATE_VAR
, name
,
357 NULL
, (gl_state_index
*) stateTokens
);
358 paramList
->StateFlags
|= _mesa_program_state_flags(stateTokens
);
360 /* free name string here since we duplicated it in add_parameter() */
368 * Lookup a parameter value by name in the given parameter list.
369 * \return pointer to the float[4] values.
372 _mesa_lookup_parameter_value(const struct gl_program_parameter_list
*paramList
,
373 GLsizei nameLen
, const char *name
)
375 GLint i
= _mesa_lookup_parameter_index(paramList
, nameLen
, name
);
379 return paramList
->ParameterValues
[i
];
384 * Given a program parameter name, find its position in the list of parameters.
385 * \param paramList the parameter list to search
386 * \param nameLen length of name (in chars).
387 * If length is negative, assume that name is null-terminated.
388 * \param name the name to search for
389 * \return index of parameter in the list.
392 _mesa_lookup_parameter_index(const struct gl_program_parameter_list
*paramList
,
393 GLsizei nameLen
, const char *name
)
401 /* name is null-terminated */
402 for (i
= 0; i
< (GLint
) paramList
->NumParameters
; i
++) {
403 if (paramList
->Parameters
[i
].Name
&&
404 strcmp(paramList
->Parameters
[i
].Name
, name
) == 0)
409 /* name is not null-terminated, use nameLen */
410 for (i
= 0; i
< (GLint
) paramList
->NumParameters
; i
++) {
411 if (paramList
->Parameters
[i
].Name
&&
412 strncmp(paramList
->Parameters
[i
].Name
, name
, nameLen
) == 0
413 && strlen(paramList
->Parameters
[i
].Name
) == (size_t)nameLen
)
422 * Look for a float vector in the given parameter list. The float vector
423 * may be of length 1, 2, 3 or 4. If swizzleOut is non-null, we'll try
424 * swizzling to find a match.
425 * \param list the parameter list to search
426 * \param v the float vector to search for
427 * \param vSize number of element in v
428 * \param posOut returns the position of the constant, if found
429 * \param swizzleOut returns a swizzle mask describing location of the
430 * vector elements if found.
431 * \return GL_TRUE if found, GL_FALSE if not found
434 _mesa_lookup_parameter_constant(const struct gl_program_parameter_list
*list
,
435 const gl_constant_value v
[], GLuint vSize
,
436 GLint
*posOut
, GLuint
*swizzleOut
)
448 for (i
= 0; i
< list
->NumParameters
; i
++) {
449 if (list
->Parameters
[i
].Type
== PROGRAM_CONSTANT
) {
451 /* swizzle not allowed */
453 for (j
= 0; j
< vSize
; j
++) {
454 if (v
[j
].u
== list
->ParameterValues
[i
][j
].u
)
457 if (match
== vSize
) {
463 /* try matching w/ swizzle */
465 /* look for v[0] anywhere within float[4] value */
467 for (j
= 0; j
< list
->Parameters
[i
].Size
; j
++) {
468 if (list
->ParameterValues
[i
][j
].u
== v
[0].u
) {
471 *swizzleOut
= MAKE_SWIZZLE4(j
, j
, j
, j
);
476 else if (vSize
<= list
->Parameters
[i
].Size
) {
477 /* see if we can match this constant (with a swizzle) */
479 GLuint match
= 0, j
, k
;
480 for (j
= 0; j
< vSize
; j
++) {
481 if (v
[j
].u
== list
->ParameterValues
[i
][j
].u
) {
486 for (k
= 0; k
< list
->Parameters
[i
].Size
; k
++) {
487 if (v
[j
].u
== list
->ParameterValues
[i
][k
].u
) {
495 /* smear last value to remaining positions */
499 if (match
== vSize
) {
501 *swizzleOut
= MAKE_SWIZZLE4(swz
[0], swz
[1], swz
[2], swz
[3]);
514 struct gl_program_parameter_list
*
515 _mesa_clone_parameter_list(const struct gl_program_parameter_list
*list
)
517 struct gl_program_parameter_list
*clone
;
520 clone
= _mesa_new_parameter_list();
524 /** Not too efficient, but correct */
525 for (i
= 0; i
< list
->NumParameters
; i
++) {
526 struct gl_program_parameter
*p
= list
->Parameters
+ i
;
527 struct gl_program_parameter
*pCopy
;
528 GLuint size
= MIN2(p
->Size
, 4);
529 GLint j
= _mesa_add_parameter(clone
, p
->Type
, p
->Name
, size
, p
->DataType
,
530 list
->ParameterValues
[i
], NULL
);
532 pCopy
= clone
->Parameters
+ j
;
533 /* copy state indexes */
534 if (p
->Type
== PROGRAM_STATE_VAR
) {
536 for (k
= 0; k
< STATE_LENGTH
; k
++) {
537 pCopy
->StateIndexes
[k
] = p
->StateIndexes
[k
];
541 clone
->Parameters
[j
].Size
= p
->Size
;
546 clone
->StateFlags
= list
->StateFlags
;
553 * Return a new parameter list which is listA + listB.
555 struct gl_program_parameter_list
*
556 _mesa_combine_parameter_lists(const struct gl_program_parameter_list
*listA
,
557 const struct gl_program_parameter_list
*listB
)
559 struct gl_program_parameter_list
*list
;
562 list
= _mesa_clone_parameter_list(listA
);
565 for (i
= 0; i
< listB
->NumParameters
; i
++) {
566 struct gl_program_parameter
*param
= listB
->Parameters
+ i
;
567 _mesa_add_parameter(list
, param
->Type
, param
->Name
, param
->Size
,
569 listB
->ParameterValues
[i
],
570 param
->StateIndexes
);
575 list
= _mesa_clone_parameter_list(listB
);