/*
* Mesa 3-D graphics library
*
* Copyright (C) 1999-2008 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
* 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.
*/
/**
* \file prog_parameter.c
* Program parameter lists and functions.
* \author Brian Paul
*/
#include "main/glheader.h"
#include "main/imports.h"
#include "main/macros.h"
#include "prog_instruction.h"
#include "prog_parameter.h"
#include "prog_statevars.h"
struct gl_program_parameter_list *
_mesa_new_parameter_list(void)
{
return CALLOC_STRUCT(gl_program_parameter_list);
}
struct gl_program_parameter_list *
_mesa_new_parameter_list_sized(unsigned size)
{
struct gl_program_parameter_list *p = _mesa_new_parameter_list();
if ((p != NULL) && (size != 0)) {
p->Size = size;
/* alloc arrays */
p->Parameters = (struct gl_program_parameter *)
calloc(size
, sizeof(struct gl_program_parameter
));
p->ParameterValues = (gl_constant_value (*)[4])
_mesa_align_malloc(size * 4 *sizeof(gl_constant_value), 16);
if ((p->Parameters == NULL) || (p->ParameterValues == NULL)) {
_mesa_align_free(p->ParameterValues);
p = NULL;
}
}
return p;
}
/**
* Free a parameter list and all its parameters
*/
void
_mesa_free_parameter_list(struct gl_program_parameter_list *paramList)
{
GLuint i;
for (i = 0; i < paramList->NumParameters; i++) {
free((void *)paramList
->Parameters
[i
].
Name); }
free(paramList
->Parameters
); _mesa_align_free(paramList->ParameterValues);
}
/**
* Add a new parameter to a parameter list.
* Note that parameter values are usually 4-element GLfloat vectors.
* When size > 4 we'll allocate a sequential block of parameters to
* store all the values (in blocks of 4).
*
* \param paramList the list to add the parameter to
* \param type type of parameter, such as
* \param name the parameter name, will be duplicated/copied!
* \param size number of elements in 'values' vector (1..4, or more)
* \param datatype GL_FLOAT, GL_FLOAT_VECx, GL_INT, GL_INT_VECx or GL_NONE.
* \param values initial parameter value, up to 4 gl_constant_values, or NULL
* \param state state indexes, or NULL
* \return index of new parameter in the list, or -1 if error (out of mem)
*/
GLint
_mesa_add_parameter(struct gl_program_parameter_list *paramList,
gl_register_file type, const char *name,
GLuint size, GLenum datatype,
const gl_constant_value *values,
const gl_state_index state[STATE_LENGTH])
{
const GLuint oldNum = paramList->NumParameters;
const GLuint sz4 = (size + 3) / 4; /* no. of new param slots needed */
if (oldNum + sz4 > paramList->Size) {
/* Need to grow the parameter list array (alloc some extra) */
paramList->Size = paramList->Size + 4 * sz4;
/* realloc arrays */
paramList->Parameters =
paramList->Size * sizeof(struct gl_program_parameter));
paramList->ParameterValues = (gl_constant_value (*)[4])
_mesa_align_realloc(paramList->ParameterValues, /* old buf */
oldNum * 4 * sizeof(gl_constant_value),/* old sz */
paramList->Size*4*sizeof(gl_constant_value),/*new*/
16);
}
if (!paramList->Parameters ||
!paramList->ParameterValues) {
/* out of memory */
paramList->NumParameters = 0;
paramList->Size = 0;
return -1;
}
else {
GLuint i, j;
paramList->NumParameters = oldNum + sz4;
memset(¶mList
->Parameters
[oldNum
], 0, sz4 * sizeof(struct gl_program_parameter));
for (i = 0; i < sz4; i++) {
struct gl_program_parameter *p = paramList->Parameters + oldNum + i;
p->Name = name ? strdup(name) : NULL;
p->Type = type;
p->Size = size;
p->DataType = datatype;
if (values) {
if (size >= 4) {
COPY_4V(paramList->ParameterValues[oldNum + i], values);
}
else {
/* copy 1, 2 or 3 values */
GLuint remaining = size % 4;
for (j = 0; j < remaining; j++) {
paramList->ParameterValues[oldNum + i][j].f = values[j].f;
}
/* fill in remaining positions with zeros */
for (; j < 4; j++) {
paramList->ParameterValues[oldNum + i][j].f = 0.0f;
}
}
values += 4;
p->Initialized = GL_TRUE;
}
else {
/* silence valgrind */
for (j = 0; j < 4; j++)
paramList->ParameterValues[oldNum + i][j].f = 0;
}
size -= 4;
}
if (state) {
for (i = 0; i < STATE_LENGTH; i++)
paramList->Parameters[oldNum].StateIndexes[i] = state[i];
}
return (GLint) oldNum;
}
}
/**
* Add a new unnamed constant to the parameter list. This will be used
* when a fragment/vertex program contains something like this:
* MOV r, { 0, 1, 2, 3 };
* If swizzleOut is non-null we'll search the parameter list for an
* existing instance of the constant which matches with a swizzle.
*
* \param paramList the parameter list
* \param values four float values
* \param swizzleOut returns swizzle mask for accessing the constant
* \return index/position of the new parameter in the parameter list.
*/
GLint
_mesa_add_typed_unnamed_constant(struct gl_program_parameter_list *paramList,
const gl_constant_value values[4], GLuint size,
GLenum datatype, GLuint *swizzleOut)
{
GLint pos;
if (swizzleOut &&
_mesa_lookup_parameter_constant(paramList, values,
size, &pos, swizzleOut)) {
return pos;
}
/* Look for empty space in an already unnamed constant parameter
* to add this constant. This will only work for single-element
* constants because we rely on smearing (i.e. .yyyy or .zzzz).
*/
if (size == 1 && swizzleOut) {
for (pos = 0; pos < (GLint) paramList->NumParameters; pos++) {
struct gl_program_parameter *p = paramList->Parameters + pos;
if (p->Type == PROGRAM_CONSTANT && p->Size + size <= 4) {
/* ok, found room */
gl_constant_value *pVal = paramList->ParameterValues[pos];
GLuint swz = p->Size; /* 1, 2 or 3 for Y, Z, W */
pVal[p->Size] = values[0];
p->Size++;
*swizzleOut = MAKE_SWIZZLE4(swz, swz, swz, swz);
return pos;
}
}
}
/* add a new parameter to store this constant */
pos = _mesa_add_parameter(paramList, PROGRAM_CONSTANT, NULL,
size, datatype, values, NULL);
if (pos >= 0 && swizzleOut) {
if (size == 1)
*swizzleOut = SWIZZLE_XXXX;
else
*swizzleOut = SWIZZLE_NOOP;
}
return pos;
}
/**
* Add a new unnamed constant to the parameter list. This will be used
* when a fragment/vertex program contains something like this:
* MOV r, { 0, 1, 2, 3 };
* If swizzleOut is non-null we'll search the parameter list for an
* existing instance of the constant which matches with a swizzle.
*
* \param paramList the parameter list
* \param values four float values
* \param swizzleOut returns swizzle mask for accessing the constant
* \return index/position of the new parameter in the parameter list.
* \sa _mesa_add_typed_unnamed_constant
*/
GLint
_mesa_add_unnamed_constant(struct gl_program_parameter_list *paramList,
const gl_constant_value values[4], GLuint size,
GLuint *swizzleOut)
{
return _mesa_add_typed_unnamed_constant(paramList, values, size, GL_NONE,
swizzleOut);
}
/**
* Add a new state reference to the parameter list.
* This will be used when the program contains something like this:
* PARAM ambient = state.material.front.ambient;
*
* \param paramList the parameter list
* \param stateTokens an array of 5 (STATE_LENGTH) state tokens
* \return index of the new parameter.
*/
GLint
_mesa_add_state_reference(struct gl_program_parameter_list *paramList,
const gl_state_index stateTokens[STATE_LENGTH])
{
const GLuint size = 4; /* XXX fix */
char *name;
GLint index;
/* Check if the state reference is already in the list */
for (index = 0; index < (GLint) paramList->NumParameters; index++) {
if (!memcmp(paramList
->Parameters
[index
].
StateIndexes, stateTokens, STATE_LENGTH * sizeof(gl_state_index))) {
return index;
}
}
name = _mesa_program_state_string(stateTokens);
index = _mesa_add_parameter(paramList, PROGRAM_STATE_VAR, name,
size, GL_NONE,
NULL, (gl_state_index *) stateTokens);
paramList->StateFlags |= _mesa_program_state_flags(stateTokens);
/* free name string here since we duplicated it in add_parameter() */
return index;
}
/**
* Given a program parameter name, find its position in the list of parameters.
* \param paramList the parameter list to search
* \param nameLen length of name (in chars).
* If length is negative, assume that name is null-terminated.
* \param name the name to search for
* \return index of parameter in the list.
*/
GLint
_mesa_lookup_parameter_index(const struct gl_program_parameter_list *paramList,
GLsizei nameLen, const char *name)
{
GLint i;
if (!paramList)
return -1;
if (nameLen == -1) {
/* name is null-terminated */
for (i = 0; i < (GLint) paramList->NumParameters; i++) {
if (paramList->Parameters[i].Name &&
strcmp(paramList
->Parameters
[i
].
Name, name
) == 0) return i;
}
}
else {
/* name is not null-terminated, use nameLen */
for (i = 0; i < (GLint) paramList->NumParameters; i++) {
if (paramList->Parameters[i].Name &&
strncmp(paramList
->Parameters
[i
].
Name, name
, nameLen
) == 0 && strlen(paramList
->Parameters
[i
].
Name) == (size_t)nameLen
) return i;
}
}
return -1;
}
/**
* Look for a float vector in the given parameter list. The float vector
* may be of length 1, 2, 3 or 4. If swizzleOut is non-null, we'll try
* swizzling to find a match.
* \param list the parameter list to search
* \param v the float vector to search for
* \param vSize number of element in v
* \param posOut returns the position of the constant, if found
* \param swizzleOut returns a swizzle mask describing location of the
* vector elements if found.
* \return GL_TRUE if found, GL_FALSE if not found
*/
GLboolean
_mesa_lookup_parameter_constant(const struct gl_program_parameter_list *list,
const gl_constant_value v[], GLuint vSize,
GLint *posOut, GLuint *swizzleOut)
{
GLuint i;
if (!list) {
*posOut = -1;
return GL_FALSE;
}
for (i = 0; i < list->NumParameters; i++) {
if (list->Parameters[i].Type == PROGRAM_CONSTANT) {
if (!swizzleOut) {
/* swizzle not allowed */
GLuint j, match = 0;
for (j = 0; j < vSize; j++) {
if (v[j].u == list->ParameterValues[i][j].u)
match++;
}
if (match == vSize) {
*posOut = i;
return GL_TRUE;
}
}
else {
/* try matching w/ swizzle */
if (vSize == 1) {
/* look for v[0] anywhere within float[4] value */
GLuint j;
for (j = 0; j < list->Parameters[i].Size; j++) {
if (list->ParameterValues[i][j].u == v[0].u) {
/* found it */
*posOut = i;
*swizzleOut = MAKE_SWIZZLE4(j, j, j, j);
return GL_TRUE;
}
}
}
else if (vSize <= list->Parameters[i].Size) {
/* see if we can match this constant (with a swizzle) */
GLuint swz[4];
GLuint match = 0, j, k;
for (j = 0; j < vSize; j++) {
if (v[j].u == list->ParameterValues[i][j].u) {
swz[j] = j;
match++;
}
else {
for (k = 0; k < list->Parameters[i].Size; k++) {
if (v[j].u == list->ParameterValues[i][k].u) {
swz[j] = k;
match++;
break;
}
}
}
}
/* smear last value to remaining positions */
for (; j < 4; j++)
swz[j] = swz[j-1];
if (match == vSize) {
*posOut = i;
*swizzleOut = MAKE_SWIZZLE4(swz[0], swz[1], swz[2], swz[3]);
return GL_TRUE;
}
}
}
}
}
*posOut = -1;
return GL_FALSE;
}
struct gl_program_parameter_list *
_mesa_clone_parameter_list(const struct gl_program_parameter_list *list)
{
struct gl_program_parameter_list *clone;
GLuint i;
clone = _mesa_new_parameter_list();
if (!clone)
return NULL;
/** Not too efficient, but correct */
for (i = 0; i < list->NumParameters; i++) {
struct gl_program_parameter *p = list->Parameters + i;
struct gl_program_parameter *pCopy;
GLuint size = MIN2(p->Size, 4);
GLint j = _mesa_add_parameter(clone, p->Type, p->Name, size, p->DataType,
list->ParameterValues[i], NULL);
pCopy = clone->Parameters + j;
/* copy state indexes */
if (p->Type == PROGRAM_STATE_VAR) {
GLint k;
for (k = 0; k < STATE_LENGTH; k++) {
pCopy->StateIndexes[k] = p->StateIndexes[k];
}
}
else {
clone->Parameters[j].Size = p->Size;
}
}
clone->StateFlags = list->StateFlags;
return clone;
}
/**
* Return a new parameter list which is listA + listB.
*/
struct gl_program_parameter_list *
_mesa_combine_parameter_lists(const struct gl_program_parameter_list *listA,
const struct gl_program_parameter_list *listB)
{
struct gl_program_parameter_list *list;
if (listA) {
list = _mesa_clone_parameter_list(listA);
if (list && listB) {
GLuint i;
for (i = 0; i < listB->NumParameters; i++) {
struct gl_program_parameter *param = listB->Parameters + i;
_mesa_add_parameter(list, param->Type, param->Name, param->Size,
param->DataType,
listB->ParameterValues[i],
param->StateIndexes);
}
}
}
else if (listB) {
list = _mesa_clone_parameter_list(listB);
}
else {
list = NULL;
}
return list;
}