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/*
* Mesa 3-D graphics library
* Version: 6.5.3
*
* Copyright (C) 1999-2007 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.
*/
/**
* \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);
}
/**
* 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++) {
if (paramList->Parameters[i].Name)
_mesa_free((void *) paramList->Parameters[i].Name);
}
_mesa_free(paramList->Parameters);
if (paramList->ParameterValues)
_mesa_align_free(paramList->ParameterValues);
_mesa_free(paramList);
}
/**
* 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 values initial parameter value, up to 4 GLfloats, 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,
enum register_file type, const char *name,
GLuint size, GLenum datatype, const GLfloat *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 */
assert(size > 0);
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 = (struct gl_program_parameter *)
_mesa_realloc(paramList->Parameters,
oldNum * sizeof(struct gl_program_parameter),
paramList->Size * sizeof(struct gl_program_parameter));
paramList->ParameterValues = (GLfloat (*)[4])
_mesa_align_realloc(paramList->ParameterValues, /* old buf */
oldNum * 4 * sizeof(GLfloat), /* old size */
paramList->Size * 4 *sizeof(GLfloat), /* new sz */
16);
}
if (!paramList->Parameters ||
!paramList->ParameterValues) {
/* out of memory */
paramList->NumParameters = 0;
paramList->Size = 0;
return -1;
}
else {
GLuint i;
paramList->NumParameters = oldNum + sz4;
_mesa_memset(&paramList->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 ? _mesa_strdup(name) : NULL;
p->Type = type;
p->Size = size;
p->DataType = datatype;
if (values) {
COPY_4V(paramList->ParameterValues[oldNum + i], values);
values += 4;
}
else {
/* silence valgrind */
ASSIGN_4V(paramList->ParameterValues[oldNum + i], 0, 0, 0, 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 named program parameter (Ex: NV_fragment_program DEFINE statement)
* \return index of the new entry in the parameter list
*/
GLint
_mesa_add_named_parameter(struct gl_program_parameter_list *paramList,
const char *name, const GLfloat values[4])
{
return _mesa_add_parameter(paramList, PROGRAM_NAMED_PARAM, name,
4, GL_NONE, values, NULL);
}
/**
* Add a new named constant to the parameter list.
* This will be used when the program contains something like this:
* PARAM myVals = { 0, 1, 2, 3 };
*
* \param paramList the parameter list
* \param name the name for the constant
* \param values four float values
* \return index/position of the new parameter in the parameter list
*/
GLint
_mesa_add_named_constant(struct gl_program_parameter_list *paramList,
const char *name, const GLfloat values[4],
GLuint size)
{
#if 0 /* disable this for now -- we need to save the name! */
GLint pos;
GLuint swizzle;
ASSERT(size == 4); /* XXX future feature */
/* check if we already have this constant */
if (_mesa_lookup_parameter_constant(paramList, values, 4, &pos, &swizzle)) {
return pos;
}
#endif
size = 4; /** XXX fix */
return _mesa_add_parameter(paramList, PROGRAM_CONSTANT, name,
size, GL_NONE, values, NULL);
}
/**
* 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 };
* We'll search the parameter list for an existing instance of the
* constant. If swizzleOut is non-null, we'll try swizzling when
* looking for a match.
*
* \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_unnamed_constant(struct gl_program_parameter_list *paramList,
const GLfloat values[4], GLuint size,
GLuint *swizzleOut)
{
GLint pos;
ASSERT(size >= 1);
ASSERT(size <= 4);
if (_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 */
GLfloat *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, GL_NONE, values, NULL);
if (pos >= 0 && swizzleOut) {
if (size == 1)
*swizzleOut = SWIZZLE_XXXX;
else
*swizzleOut = SWIZZLE_NOOP;
}
return pos;
}
/**
* Add a uniform to the parameter list.
* Note that if the uniform is an array, size may be greater than
* what's implied by the datatype.
* \param name uniform's name
* \param size number of floats to allocate
* \param datatype GL_FLOAT_VEC3, GL_FLOAT_MAT4, etc.
*/
GLint
_mesa_add_uniform(struct gl_program_parameter_list *paramList,
const char *name, GLuint size, GLenum datatype)
{
GLint i = _mesa_lookup_parameter_index(paramList, -1, name);
ASSERT(datatype != GL_NONE);
if (i >= 0 && paramList->Parameters[i].Type == PROGRAM_UNIFORM) {
ASSERT(paramList->Parameters[i].Size == size);
ASSERT(paramList->Parameters[i].DataType == datatype);
/* already in list */
return i;
}
else {
i = _mesa_add_parameter(paramList, PROGRAM_UNIFORM, name,
size, datatype, NULL, NULL);
return i;
}
}
/**
* Add a sampler to the parameter list.
* \param name uniform's name
* \param datatype GL_SAMPLER_2D, GL_SAMPLER_2D_RECT_ARB, etc.
* \param index the sampler number (as seen in TEX instructions)
* \return sampler index (starting at zero) or -1 if error
*/
GLint
_mesa_add_sampler(struct gl_program_parameter_list *paramList,
const char *name, GLenum datatype)
{
GLint i = _mesa_lookup_parameter_index(paramList, -1, name);
if (i >= 0 && paramList->Parameters[i].Type == PROGRAM_SAMPLER) {
ASSERT(paramList->Parameters[i].Size == 1);
ASSERT(paramList->Parameters[i].DataType == datatype);
/* already in list */
return (GLint) paramList->ParameterValues[i][0];
}
else {
GLuint i;
const GLint size = 1; /* a sampler is basically a texture unit number */
GLfloat value;
GLint numSamplers = 0;
for (i = 0; i < paramList->NumParameters; i++) {
if (paramList->Parameters[i].Type == PROGRAM_SAMPLER)
numSamplers++;
}
value = (GLfloat) numSamplers;
(void) _mesa_add_parameter(paramList, PROGRAM_SAMPLER, name,
size, datatype, &value, NULL);
return numSamplers;
}
}
/**
* Add parameter representing a varying variable.
*/
GLint
_mesa_add_varying(struct gl_program_parameter_list *paramList,
const char *name, GLuint size)
{
GLint i = _mesa_lookup_parameter_index(paramList, -1, name);
if (i >= 0 && paramList->Parameters[i].Type == PROGRAM_VARYING) {
/* already in list */
return i;
}
else {
/*assert(size == 4);*/
i = _mesa_add_parameter(paramList, PROGRAM_VARYING, name,
size, GL_NONE, NULL, NULL);
return i;
}
}
/**
* Add parameter representing a vertex program attribute.
* \param size size of attribute (in floats), may be -1 if unknown
* \param attrib the attribute index, or -1 if unknown
*/
GLint
_mesa_add_attribute(struct gl_program_parameter_list *paramList,
const char *name, GLint size, GLenum datatype, GLint attrib)
{
GLint i = _mesa_lookup_parameter_index(paramList, -1, name);
if (i >= 0) {
/* replace */
if (attrib < 0)
attrib = i;
paramList->Parameters[i].StateIndexes[0] = attrib;
}
else {
/* add */
gl_state_index state[STATE_LENGTH];
state[0] = (gl_state_index) attrib;
if (size < 0)
size = 4;
i = _mesa_add_parameter(paramList, PROGRAM_INPUT, name,
size, datatype, NULL, state);
}
return i;
}
#if 0 /* not used yet */
/**
* Returns the number of 4-component registers needed to store a piece
* of GL state. For matrices this may be as many as 4 registers,
* everything else needs
* just 1 register.
*/
static GLuint
sizeof_state_reference(const GLint *stateTokens)
{
if (stateTokens[0] == STATE_MATRIX) {
GLuint rows = stateTokens[4] - stateTokens[3] + 1;
assert(rows >= 1);
assert(rows <= 4);
return rows;
}
else {
return 1;
}
}
#endif
/**
* 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 */
const char *name;
GLint index;
/* Check if the state reference is already in the list */
for (index = 0; index < (GLint) paramList->NumParameters; index++) {
GLuint i, match = 0;
for (i = 0; i < STATE_LENGTH; i++) {
if (paramList->Parameters[index].StateIndexes[i] == stateTokens[i]) {
match++;
}
else {
break;
}
}
if (match == STATE_LENGTH) {
/* this state reference is already in the parameter list */
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() */
_mesa_free((void *) name);
return index;
}
/**
* Lookup a parameter value by name in the given parameter list.
* \return pointer to the float[4] values.
*/
GLfloat *
_mesa_lookup_parameter_value(const struct gl_program_parameter_list *paramList,
GLsizei nameLen, const char *name)
{
GLuint i = _mesa_lookup_parameter_index(paramList, nameLen, name);
if (i < 0)
return NULL;
else
return paramList->ParameterValues[i];
}
/**
* 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 &&
_mesa_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 &&
_mesa_strncmp(paramList->Parameters[i].Name, name, nameLen) == 0
&& _mesa_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 size 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 GLfloat v[], GLuint vSize,
GLint *posOut, GLuint *swizzleOut)
{
GLuint i;
assert(vSize >= 1);
assert(vSize <= 4);
if (!list)
return -1;
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] == list->ParameterValues[i][j])
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 < 4; j++) {
if (list->ParameterValues[i][j] == v[0]) {
/* 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] == list->ParameterValues[i][j]) {
swz[j] = j;
match++;
}
else {
for (k = 0; k < list->Parameters[i].Size; k++) {
if (v[j] == list->ParameterValues[i][k]) {
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;
GLuint size = MIN2(p->Size, 4);
GLint j = _mesa_add_parameter(clone, p->Type, p->Name, size, p->DataType,
list->ParameterValues[i], NULL);
ASSERT(j >= 0);
/* copy state indexes */
if (p->Type == PROGRAM_STATE_VAR) {
GLint k;
struct gl_program_parameter *q = clone->Parameters + j;
for (k = 0; k < STATE_LENGTH; k++) {
q->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;
}
/**
* Find longest name of all uniform parameters in list.
*/
GLuint
_mesa_longest_parameter_name(const struct gl_program_parameter_list *list,
enum register_file type)
{
GLuint i, maxLen = 0;
if (!list)
return 0;
for (i = 0; i < list->NumParameters; i++) {
if (list->Parameters[i].Type == type) {
GLuint len = _mesa_strlen(list->Parameters[i].Name);
if (len > maxLen)
maxLen = len;
}
}
return maxLen;
}
/**
* Count the number of parameters in the last that match the given type.
*/
GLuint
_mesa_num_parameters_of_type(const struct gl_program_parameter_list *list,
enum register_file type)
{
GLuint i, count = 0;
if (list) {
for (i = 0; i < list->NumParameters; i++) {
if (list->Parameters[i].Type == type)
count++;
}
}
return count;
}