/* * Mesa 3-D graphics library * Version: 6.5.2 * * Copyright (C) 1999-2006 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 "glheader.h" #include "imports.h" #include "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 (struct gl_program_parameter_list *) _mesa_calloc(sizeof(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 name the parameter name, will be duplicated/copied! * \param values initial parameter value, up to 4 GLfloats * \param size number of elements in 'values' vector (1..4, or more) * \param type type of parameter, such as * \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, const char *name, const GLfloat *values, GLuint size, enum register_file type) { const GLuint oldNum = paramList->NumParameters; const GLuint sz4 = (size + 3) / 4; /* no. of new param slots needed */ assert(size > 0); assert(size <= 16); /* XXX anything larger than a matrix??? */ 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(¶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 ? _mesa_strdup(name) : NULL; p->Type = type; p->Size = size; if (values) { COPY_4V(paramList->ParameterValues[oldNum + i], values); values += 4; } size -= 4; } 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, name, values, 4, PROGRAM_NAMED_PARAM); } /** * 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, name, values, size, PROGRAM_CONSTANT); } /** * Add a new unnamed constant to the parameter list. * This will be used when the program contains something like this: * MOV r, { 0, 1, 2, 3 }; * * \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; GLuint swizzle; ASSERT(size >= 1); ASSERT(size <= 4); size = 4; /* XXX temporary */ /* check if we already have this constant */ if (_mesa_lookup_parameter_constant(paramList, values, size, &pos, &swizzle)) { return pos; } return _mesa_add_parameter(paramList, NULL, values, size, PROGRAM_CONSTANT); } GLint _mesa_add_uniform(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_UNIFORM) { /* already in list */ return i; } else { i = _mesa_add_parameter(paramList, name, NULL, size, PROGRAM_UNIFORM); return i; } } GLint _mesa_add_sampler(struct gl_program_parameter_list *paramList, const char *name) { GLint i = _mesa_lookup_parameter_index(paramList, -1, name); if (i >= 0 && paramList->Parameters[i].Type == PROGRAM_SAMPLER) { /* already in list */ return i; } else { const GLint size = 1; i = _mesa_add_parameter(paramList, name, NULL, size, PROGRAM_SAMPLER); return i; } } /** * 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, name, NULL, size, PROGRAM_VARYING); return i; } } /** * Add parameter representing a vertex program attribute. */ GLint _mesa_add_attribute(struct gl_program_parameter_list *paramList, const char *name, GLint attrib) { GLint size = 4; /* XXX ok? */ GLint i = _mesa_lookup_parameter_index(paramList, -1, name); if (i >= 0) { /* replace */ ASSERT(paramList->Parameters[i].StateIndexes[0] == STATE_USER_ATTRIB); paramList->Parameters[i].StateIndexes[1] = attrib; } else { /* add */ i = _mesa_add_parameter(paramList, name, NULL, size, PROGRAM_INPUT); if (i >= 0) { paramList->Parameters[i].StateIndexes[0] = STATE_USER_ATTRIB; paramList->Parameters[i].StateIndexes[1] = attrib; } } 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 state an array of 6 state tokens * \return index of the new parameter. */ GLint _mesa_add_state_reference(struct gl_program_parameter_list *paramList, const GLint *stateTokens) { 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 < paramList->NumParameters; index++) { GLuint i, match = 0; for (i = 0; i < 6; i++) { if (paramList->Parameters[index].StateIndexes[i] == stateTokens[i]) { match++; } else { break; } } if (match == 6) { /* this state reference is already in the parameter list */ return index; } } name = _mesa_program_state_string(stateTokens); index = _mesa_add_parameter(paramList, name, NULL, size, PROGRAM_STATE_VAR); if (index >= 0) { GLuint i; for (i = 0; i < 6; i++) { paramList->Parameters[index].StateIndexes[i] = (gl_state_index) stateTokens[i]; } 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. * \param paramList 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 *paramList, const GLfloat v[], GLsizei vSize, GLint *posOut, GLuint *swizzleOut) { GLuint i; assert(vSize >= 1); assert(vSize <= 4); if (!paramList) return -1; for (i = 0; i < paramList->NumParameters; i++) { if (paramList->Parameters[i].Type == PROGRAM_CONSTANT) { const GLint maxShift = 4 - vSize; GLint shift, j; for (shift = 0; shift <= maxShift; shift++) { GLint matched = 0; GLuint swizzle[4]; swizzle[0] = swizzle[1] = swizzle[2] = swizzle[3] = 0; /* XXX we could do out-of-order swizzle matches too, someday */ for (j = 0; j < vSize; j++) { assert(shift + j < 4); if (paramList->ParameterValues[i][shift + j] == v[j]) { matched++; swizzle[j] = shift + j; ASSERT(swizzle[j] >= SWIZZLE_X); ASSERT(swizzle[j] <= SWIZZLE_W); } } if (matched == vSize) { /* found! */ *posOut = i; *swizzleOut = MAKE_SWIZZLE4(swizzle[0], swizzle[1], swizzle[2], swizzle[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->Name, list->ParameterValues[i], size, p->Type); 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 < 6; k++) { q->StateIndexes[k] = p->StateIndexes[k]; } } else { clone->Parameters[j].Size = p->Size; } } return clone; } /** * Find longest name of any parameter in list. */ GLuint _mesa_parameter_longest_name(const struct gl_program_parameter_list *list) { GLuint i, maxLen = 0; if (!list) return 0; for (i = 0; i < list->NumParameters; i++) { GLuint len = _mesa_strlen(list->Parameters[i].Name); if (len > maxLen) maxLen = len; } return maxLen; }