2 * Mesa 3-D graphics library
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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"
41 * Look for a float vector in the given parameter list. The float vector
42 * may be of length 1, 2, 3 or 4. If swizzleOut is non-null, we'll try
43 * swizzling to find a match.
44 * \param list the parameter list to search
45 * \param v the float vector to search for
46 * \param vSize number of element in v
47 * \param posOut returns the position of the constant, if found
48 * \param swizzleOut returns a swizzle mask describing location of the
49 * vector elements if found.
50 * \return GL_TRUE if found, GL_FALSE if not found
53 lookup_parameter_constant(const struct gl_program_parameter_list
*list
,
54 const gl_constant_value v
[], GLuint vSize
,
55 GLint
*posOut
, GLuint
*swizzleOut
)
67 for (i
= 0; i
< list
->NumParameters
; i
++) {
68 if (list
->Parameters
[i
].Type
== PROGRAM_CONSTANT
) {
70 /* swizzle not allowed */
72 for (j
= 0; j
< vSize
; j
++) {
73 if (v
[j
].u
== list
->ParameterValues
[i
][j
].u
)
82 /* try matching w/ swizzle */
84 /* look for v[0] anywhere within float[4] value */
86 for (j
= 0; j
< list
->Parameters
[i
].Size
; j
++) {
87 if (list
->ParameterValues
[i
][j
].u
== v
[0].u
) {
90 *swizzleOut
= MAKE_SWIZZLE4(j
, j
, j
, j
);
95 else if (vSize
<= list
->Parameters
[i
].Size
) {
96 /* see if we can match this constant (with a swizzle) */
98 GLuint match
= 0, j
, k
;
99 for (j
= 0; j
< vSize
; j
++) {
100 if (v
[j
].u
== list
->ParameterValues
[i
][j
].u
) {
105 for (k
= 0; k
< list
->Parameters
[i
].Size
; k
++) {
106 if (v
[j
].u
== list
->ParameterValues
[i
][k
].u
) {
114 /* smear last value to remaining positions */
118 if (match
== vSize
) {
120 *swizzleOut
= MAKE_SWIZZLE4(swz
[0], swz
[1], swz
[2], swz
[3]);
133 struct gl_program_parameter_list
*
134 _mesa_new_parameter_list(void)
136 return CALLOC_STRUCT(gl_program_parameter_list
);
140 struct gl_program_parameter_list
*
141 _mesa_new_parameter_list_sized(unsigned size
)
143 struct gl_program_parameter_list
*p
= _mesa_new_parameter_list();
145 if ((p
!= NULL
) && (size
!= 0)) {
149 p
->Parameters
= (struct gl_program_parameter
*)
150 calloc(size
, sizeof(struct gl_program_parameter
));
152 p
->ParameterValues
= (gl_constant_value (*)[4])
153 _mesa_align_malloc(size
* 4 *sizeof(gl_constant_value
), 16);
156 if ((p
->Parameters
== NULL
) || (p
->ParameterValues
== NULL
)) {
158 _mesa_align_free(p
->ParameterValues
);
169 * Free a parameter list and all its parameters
172 _mesa_free_parameter_list(struct gl_program_parameter_list
*paramList
)
175 for (i
= 0; i
< paramList
->NumParameters
; i
++) {
176 free((void *)paramList
->Parameters
[i
].Name
);
178 free(paramList
->Parameters
);
179 _mesa_align_free(paramList
->ParameterValues
);
185 * Make sure there are enough unused parameter slots. Reallocate the list
188 * \param paramList where to reserve parameter slots
189 * \param reserve_slots number of slots to reserve
192 _mesa_reserve_parameter_storage(struct gl_program_parameter_list
*paramList
,
193 unsigned reserve_slots
)
195 const GLuint oldNum
= paramList
->NumParameters
;
197 if (oldNum
+ reserve_slots
> paramList
->Size
) {
198 /* Need to grow the parameter list array (alloc some extra) */
199 paramList
->Size
= paramList
->Size
+ 4 * reserve_slots
;
202 paramList
->Parameters
=
203 realloc(paramList
->Parameters
,
204 paramList
->Size
* sizeof(struct gl_program_parameter
));
206 paramList
->ParameterValues
= (gl_constant_value (*)[4])
207 _mesa_align_realloc(paramList
->ParameterValues
, /* old buf */
208 oldNum
* 4 * sizeof(gl_constant_value
),/* old sz */
209 paramList
->Size
*4*sizeof(gl_constant_value
),/*new*/
216 * Add a new parameter to a parameter list.
217 * Note that parameter values are usually 4-element GLfloat vectors.
218 * When size > 4 we'll allocate a sequential block of parameters to
219 * store all the values (in blocks of 4).
221 * \param paramList the list to add the parameter to
222 * \param type type of parameter, such as
223 * \param name the parameter name, will be duplicated/copied!
224 * \param size number of elements in 'values' vector (1..4, or more)
225 * \param datatype GL_FLOAT, GL_FLOAT_VECx, GL_INT, GL_INT_VECx or GL_NONE.
226 * \param values initial parameter value, up to 4 gl_constant_values, or NULL
227 * \param state state indexes, or NULL
228 * \return index of new parameter in the list, or -1 if error (out of mem)
231 _mesa_add_parameter(struct gl_program_parameter_list
*paramList
,
232 gl_register_file type
, const char *name
,
233 GLuint size
, GLenum datatype
,
234 const gl_constant_value
*values
,
235 const gl_state_index state
[STATE_LENGTH
])
237 const GLuint oldNum
= paramList
->NumParameters
;
238 const GLuint sz4
= (size
+ 3) / 4; /* no. of new param slots needed */
242 _mesa_reserve_parameter_storage(paramList
, sz4
);
244 if (!paramList
->Parameters
||
245 !paramList
->ParameterValues
) {
247 paramList
->NumParameters
= 0;
254 paramList
->NumParameters
= oldNum
+ sz4
;
256 memset(¶mList
->Parameters
[oldNum
], 0,
257 sz4
* sizeof(struct gl_program_parameter
));
259 for (i
= 0; i
< sz4
; i
++) {
260 struct gl_program_parameter
*p
= paramList
->Parameters
+ oldNum
+ i
;
261 p
->Name
= name
? strdup(name
) : NULL
;
264 p
->DataType
= datatype
;
267 COPY_4V(paramList
->ParameterValues
[oldNum
+ i
], values
);
270 /* copy 1, 2 or 3 values */
271 GLuint remaining
= size
% 4;
272 assert(remaining
< 4);
273 for (j
= 0; j
< remaining
; j
++) {
274 paramList
->ParameterValues
[oldNum
+ i
][j
].f
= values
[j
].f
;
276 /* fill in remaining positions with zeros */
278 paramList
->ParameterValues
[oldNum
+ i
][j
].f
= 0.0f
;
282 p
->Initialized
= GL_TRUE
;
285 /* silence valgrind */
286 for (j
= 0; j
< 4; j
++)
287 paramList
->ParameterValues
[oldNum
+ i
][j
].f
= 0;
293 for (i
= 0; i
< STATE_LENGTH
; i
++)
294 paramList
->Parameters
[oldNum
].StateIndexes
[i
] = state
[i
];
297 return (GLint
) oldNum
;
303 * Add a new unnamed constant to the parameter list. This will be used
304 * when a fragment/vertex program contains something like this:
305 * MOV r, { 0, 1, 2, 3 };
306 * If swizzleOut is non-null we'll search the parameter list for an
307 * existing instance of the constant which matches with a swizzle.
309 * \param paramList the parameter list
310 * \param values four float values
311 * \param swizzleOut returns swizzle mask for accessing the constant
312 * \return index/position of the new parameter in the parameter list.
315 _mesa_add_typed_unnamed_constant(struct gl_program_parameter_list
*paramList
,
316 const gl_constant_value values
[4], GLuint size
,
317 GLenum datatype
, GLuint
*swizzleOut
)
324 lookup_parameter_constant(paramList
, values
, size
, &pos
, swizzleOut
)) {
328 /* Look for empty space in an already unnamed constant parameter
329 * to add this constant. This will only work for single-element
330 * constants because we rely on smearing (i.e. .yyyy or .zzzz).
332 if (size
== 1 && swizzleOut
) {
333 for (pos
= 0; pos
< (GLint
) paramList
->NumParameters
; pos
++) {
334 struct gl_program_parameter
*p
= paramList
->Parameters
+ pos
;
335 if (p
->Type
== PROGRAM_CONSTANT
&& p
->Size
+ size
<= 4) {
337 gl_constant_value
*pVal
= paramList
->ParameterValues
[pos
];
338 GLuint swz
= p
->Size
; /* 1, 2 or 3 for Y, Z, W */
339 pVal
[p
->Size
] = values
[0];
341 *swizzleOut
= MAKE_SWIZZLE4(swz
, swz
, swz
, swz
);
347 /* add a new parameter to store this constant */
348 pos
= _mesa_add_parameter(paramList
, PROGRAM_CONSTANT
, NULL
,
349 size
, datatype
, values
, NULL
);
350 if (pos
>= 0 && swizzleOut
) {
352 *swizzleOut
= SWIZZLE_XXXX
;
354 *swizzleOut
= SWIZZLE_NOOP
;
361 * Add a new state reference to the parameter list.
362 * This will be used when the program contains something like this:
363 * PARAM ambient = state.material.front.ambient;
365 * \param paramList the parameter list
366 * \param stateTokens an array of 5 (STATE_LENGTH) state tokens
367 * \return index of the new parameter.
370 _mesa_add_state_reference(struct gl_program_parameter_list
*paramList
,
371 const gl_state_index stateTokens
[STATE_LENGTH
])
373 const GLuint size
= 4; /* XXX fix */
377 /* Check if the state reference is already in the list */
378 for (index
= 0; index
< (GLint
) paramList
->NumParameters
; index
++) {
379 if (!memcmp(paramList
->Parameters
[index
].StateIndexes
,
380 stateTokens
, STATE_LENGTH
* sizeof(gl_state_index
))) {
385 name
= _mesa_program_state_string(stateTokens
);
386 index
= _mesa_add_parameter(paramList
, PROGRAM_STATE_VAR
, name
,
388 NULL
, (gl_state_index
*) stateTokens
);
389 paramList
->StateFlags
|= _mesa_program_state_flags(stateTokens
);
391 /* free name string here since we duplicated it in add_parameter() */