/* * Mesa 3-D graphics library * Version: 6.5 * * Copyright (C) 1999-2005 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 nvfragparse.c * NVIDIA fragment program parser. * \author Brian Paul */ /* * Regarding GL_NV_fragment_program: * * Portions of this software may use or implement intellectual * property owned and licensed by NVIDIA Corporation. NVIDIA disclaims * any and all warranties with respect to such intellectual property, * including any use thereof or modifications thereto. */ #include "main/glheader.h" #include "main/context.h" #include "main/imports.h" #include "main/macros.h" #include "program.h" #include "prog_parameter.h" #include "prog_print.h" #include "prog_instruction.h" #include "nvfragparse.h" #define INPUT_1V 1 #define INPUT_2V 2 #define INPUT_3V 3 #define INPUT_1S 4 #define INPUT_2S 5 #define INPUT_CC 6 #define INPUT_1V_T 7 /* one source vector, plus textureId */ #define INPUT_3V_T 8 /* one source vector, plus textureId */ #define INPUT_NONE 9 #define INPUT_1V_S 10 /* a string and a vector register */ #define OUTPUT_V 20 #define OUTPUT_S 21 #define OUTPUT_NONE 22 /* IRIX defines some of these */ #undef _R #undef _H #undef _X #undef _C #undef _S /* Optional suffixes */ #define _R FLOAT32 /* float */ #define _H FLOAT16 /* half-float */ #define _X FIXED12 /* fixed */ #define _C 0x08 /* set cond codes */ #define _S 0x10 /* saturate, clamp result to [0,1] */ struct instruction_pattern { const char *name; enum prog_opcode opcode; GLuint inputs; GLuint outputs; GLuint suffixes; }; static const struct instruction_pattern Instructions[] = { { "ADD", OPCODE_ADD, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S }, { "COS", OPCODE_COS, INPUT_1S, OUTPUT_S, _R | _H | _C | _S }, { "DDX", OPCODE_DDX, INPUT_1V, OUTPUT_V, _R | _H | _C | _S }, { "DDY", OPCODE_DDY, INPUT_1V, OUTPUT_V, _R | _H | _C | _S }, { "DP3", OPCODE_DP3, INPUT_2V, OUTPUT_S, _R | _H | _X | _C | _S }, { "DP4", OPCODE_DP4, INPUT_2V, OUTPUT_S, _R | _H | _X | _C | _S }, { "DST", OPCODE_DP4, INPUT_2V, OUTPUT_V, _R | _H | _C | _S }, { "EX2", OPCODE_DP4, INPUT_1S, OUTPUT_S, _R | _H | _C | _S }, { "FLR", OPCODE_FLR, INPUT_1V, OUTPUT_V, _R | _H | _X | _C | _S }, { "FRC", OPCODE_FRC, INPUT_1V, OUTPUT_V, _R | _H | _X | _C | _S }, { "KIL", OPCODE_KIL_NV, INPUT_CC, OUTPUT_NONE, 0 }, { "LG2", OPCODE_LG2, INPUT_1S, OUTPUT_S, _R | _H | _C | _S }, { "LIT", OPCODE_LIT, INPUT_1V, OUTPUT_V, _R | _H | _C | _S }, { "LRP", OPCODE_LRP, INPUT_3V, OUTPUT_V, _R | _H | _X | _C | _S }, { "MAD", OPCODE_MAD, INPUT_3V, OUTPUT_V, _R | _H | _X | _C | _S }, { "MAX", OPCODE_MAX, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S }, { "MIN", OPCODE_MIN, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S }, { "MOV", OPCODE_MOV, INPUT_1V, OUTPUT_V, _R | _H | _X | _C | _S }, { "MUL", OPCODE_MUL, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S }, { "PK2H", OPCODE_PK2H, INPUT_1V, OUTPUT_S, 0 }, { "PK2US", OPCODE_PK2US, INPUT_1V, OUTPUT_S, 0 }, { "PK4B", OPCODE_PK4B, INPUT_1V, OUTPUT_S, 0 }, { "PK4UB", OPCODE_PK4UB, INPUT_1V, OUTPUT_S, 0 }, { "POW", OPCODE_POW, INPUT_2S, OUTPUT_S, _R | _H | _C | _S }, { "RCP", OPCODE_RCP, INPUT_1S, OUTPUT_S, _R | _H | _C | _S }, { "RFL", OPCODE_RFL, INPUT_2V, OUTPUT_V, _R | _H | _C | _S }, { "RSQ", OPCODE_RSQ, INPUT_1S, OUTPUT_S, _R | _H | _C | _S }, { "SEQ", OPCODE_SEQ, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S }, { "SFL", OPCODE_SFL, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S }, { "SGE", OPCODE_SGE, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S }, { "SGT", OPCODE_SGT, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S }, { "SIN", OPCODE_SIN, INPUT_1S, OUTPUT_S, _R | _H | _C | _S }, { "SLE", OPCODE_SLE, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S }, { "SLT", OPCODE_SLT, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S }, { "SNE", OPCODE_SNE, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S }, { "STR", OPCODE_STR, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S }, { "SUB", OPCODE_SUB, INPUT_2V, OUTPUT_V, _R | _H | _X | _C | _S }, { "TEX", OPCODE_TEX, INPUT_1V_T, OUTPUT_V, _C | _S }, { "TXD", OPCODE_TXD, INPUT_3V_T, OUTPUT_V, _C | _S }, { "TXP", OPCODE_TXP_NV, INPUT_1V_T, OUTPUT_V, _C | _S }, { "UP2H", OPCODE_UP2H, INPUT_1S, OUTPUT_V, _C | _S }, { "UP2US", OPCODE_UP2US, INPUT_1S, OUTPUT_V, _C | _S }, { "UP4B", OPCODE_UP4B, INPUT_1S, OUTPUT_V, _C | _S }, { "UP4UB", OPCODE_UP4UB, INPUT_1S, OUTPUT_V, _C | _S }, { "X2D", OPCODE_X2D, INPUT_3V, OUTPUT_V, _R | _H | _C | _S }, { "PRINT", OPCODE_PRINT, INPUT_1V_S, OUTPUT_NONE, 0 }, { NULL, (enum prog_opcode) -1, 0, 0, 0 } }; /* * Information needed or computed during parsing. * Remember, we can't modify the target program object until we've * _successfully_ parsed the program text. */ struct parse_state { struct gl_context *ctx; const GLubyte *start; /* start of program string */ const GLubyte *pos; /* current position */ const GLubyte *curLine; struct gl_fragment_program *program; /* current program */ struct gl_program_parameter_list *parameters; GLuint numInst; /* number of instructions parsed */ GLuint inputsRead; /* bitmask of input registers used */ GLuint outputsWritten; /* bitmask of 1 << FRAG_OUTPUT_* bits */ GLuint texturesUsed[MAX_TEXTURE_IMAGE_UNITS]; }; /* * Called whenever we find an error during parsing. */ static void record_error(struct parse_state *parseState, const char *msg, int lineNo) { #ifdef DEBUG GLint line, column; const GLubyte *lineStr; lineStr = _mesa_find_line_column(parseState->start, parseState->pos, &line, &column); _mesa_debug(parseState->ctx, "nvfragparse.c(%d): line %d, column %d:%s (%s)\n", lineNo, line, column, (char *) lineStr, msg); free((void *) lineStr); #else (void) lineNo; #endif /* Check that no error was already recorded. Only record the first one. */ if (parseState->ctx->Program.ErrorString[0] == 0) { _mesa_set_program_error(parseState->ctx, parseState->pos - parseState->start, msg); } } #define RETURN_ERROR \ do { \ record_error(parseState, "Unexpected end of input.", __LINE__); \ return GL_FALSE; \ } while(0) #define RETURN_ERROR1(msg) \ do { \ record_error(parseState, msg, __LINE__); \ return GL_FALSE; \ } while(0) #define RETURN_ERROR2(msg1, msg2) \ do { \ char err[1000]; \ sprintf(err, "%s %s", msg1, msg2); \ record_error(parseState, err, __LINE__); \ return GL_FALSE; \ } while(0) /* * Search a list of instruction structures for a match. */ static struct instruction_pattern MatchInstruction(const GLubyte *token) { const struct instruction_pattern *inst; struct instruction_pattern result; result.name = NULL; result.opcode = MAX_OPCODE; /* i.e. invalid instruction */ result.inputs = 0; result.outputs = 0; result.suffixes = 0; for (inst = Instructions; inst->name; inst++) { if (strncmp((const char *) token, inst->name, 3) == 0) { /* matched! */ int i = 3; result = *inst; result.suffixes = 0; /* look at suffix */ if (token[i] == 'R') { result.suffixes |= _R; i++; } else if (token[i] == 'H') { result.suffixes |= _H; i++; } else if (token[i] == 'X') { result.suffixes |= _X; i++; } if (token[i] == 'C') { result.suffixes |= _C; i++; } if (token[i] == '_' && token[i+1] == 'S' && token[i+2] == 'A' && token[i+3] == 'T') { result.suffixes |= _S; } return result; } } return result; } /**********************************************************************/ static GLboolean IsLetter(GLubyte b) { return (b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z') || (b == '_') || (b == '$'); } static GLboolean IsDigit(GLubyte b) { return b >= '0' && b <= '9'; } static GLboolean IsWhitespace(GLubyte b) { return b == ' ' || b == '\t' || b == '\n' || b == '\r'; } /** * Starting at 'str' find the next token. A token can be an integer, * an identifier or punctuation symbol. * \return <= 0 we found an error, else, return number of characters parsed. */ static GLint GetToken(struct parse_state *parseState, GLubyte *token) { const GLubyte *str = parseState->pos; GLint i = 0, j = 0; token[0] = 0; /* skip whitespace and comments */ while (str[i] && (IsWhitespace(str[i]) || str[i] == '#')) { if (str[i] == '#') { /* skip comment */ while (str[i] && (str[i] != '\n' && str[i] != '\r')) { i++; } if (str[i] == '\n' || str[i] == '\r') parseState->curLine = str + i + 1; } else { /* skip whitespace */ if (str[i] == '\n' || str[i] == '\r') parseState->curLine = str + i + 1; i++; } } if (str[i] == 0) return -i; /* try matching an integer */ while (str[i] && IsDigit(str[i])) { token[j++] = str[i++]; } if (j > 0 || !str[i]) { token[j] = 0; return i; } /* try matching an identifier */ if (IsLetter(str[i])) { while (str[i] && (IsLetter(str[i]) || IsDigit(str[i]))) { token[j++] = str[i++]; } token[j] = 0; return i; } /* punctuation character */ if (str[i]) { token[0] = str[i++]; token[1] = 0; return i; } /* end of input */ token[0] = 0; return i; } /** * Get next token from input stream and increment stream pointer past token. */ static GLboolean Parse_Token(struct parse_state *parseState, GLubyte *token) { GLint i; i = GetToken(parseState, token); if (i <= 0) { parseState->pos += (-i); return GL_FALSE; } parseState->pos += i; return GL_TRUE; } /** * Get next token from input stream but don't increment stream pointer. */ static GLboolean Peek_Token(struct parse_state *parseState, GLubyte *token) { GLint i, len; i = GetToken(parseState, token); if (i <= 0) { parseState->pos += (-i); return GL_FALSE; } len = (GLint) strlen((const char *) token); parseState->pos += (i - len); return GL_TRUE; } /**********************************************************************/ static const char *InputRegisters[MAX_NV_FRAGMENT_PROGRAM_INPUTS + 1] = { "WPOS", "COL0", "COL1", "FOGC", "TEX0", "TEX1", "TEX2", "TEX3", "TEX4", "TEX5", "TEX6", "TEX7", NULL }; /**********************************************************************/ /** * Try to match 'pattern' as the next token after any whitespace/comments. */ static GLboolean Parse_String(struct parse_state *parseState, const char *pattern) { const GLubyte *m; GLint i; /* skip whitespace and comments */ while (IsWhitespace(*parseState->pos) || *parseState->pos == '#') { if (*parseState->pos == '#') { while (*parseState->pos && (*parseState->pos != '\n' && *parseState->pos != '\r')) { parseState->pos += 1; } if (*parseState->pos == '\n' || *parseState->pos == '\r') parseState->curLine = parseState->pos + 1; } else { /* skip whitespace */ if (*parseState->pos == '\n' || *parseState->pos == '\r') parseState->curLine = parseState->pos + 1; parseState->pos += 1; } } /* Try to match the pattern */ m = parseState->pos; for (i = 0; pattern[i]; i++) { if (*m != (GLubyte) pattern[i]) return GL_FALSE; m += 1; } parseState->pos = m; return GL_TRUE; /* success */ } static GLboolean Parse_Identifier(struct parse_state *parseState, GLubyte *ident) { if (!Parse_Token(parseState, ident)) RETURN_ERROR; if (IsLetter(ident[0])) return GL_TRUE; else RETURN_ERROR1("Expected an identfier"); } /** * Parse a floating point constant, or a defined symbol name. * [+/-]N[.N[eN]] * Output: number[0 .. 3] will get the value. */ static GLboolean Parse_ScalarConstant(struct parse_state *parseState, GLfloat *number) { char *end = NULL; *number = (GLfloat) _mesa_strtof((const char *) parseState->pos, &end); if (end && end > (char *) parseState->pos) { /* got a number */ parseState->pos = (GLubyte *) end; number[1] = *number; number[2] = *number; number[3] = *number; return GL_TRUE; } else { /* should be an identifier */ GLubyte ident[100]; const GLfloat *constant; if (!Parse_Identifier(parseState, ident)) RETURN_ERROR1("Expected an identifier"); constant = (GLfloat *)_mesa_lookup_parameter_value(parseState->parameters, -1, (const char *) ident); /* XXX Check that it's a constant and not a parameter */ if (!constant) { RETURN_ERROR1("Undefined symbol"); } else { COPY_4V(number, constant); return GL_TRUE; } } } /** * Parse a vector constant, one of: * { float } * { float, float } * { float, float, float } * { float, float, float, float } */ static GLboolean Parse_VectorConstant(struct parse_state *parseState, GLfloat *vec) { /* "{" was already consumed */ ASSIGN_4V(vec, 0.0, 0.0, 0.0, 1.0); if (!Parse_ScalarConstant(parseState, vec+0)) /* X */ return GL_FALSE; if (Parse_String(parseState, "}")) { return GL_TRUE; } if (!Parse_String(parseState, ",")) RETURN_ERROR1("Expected comma in vector constant"); if (!Parse_ScalarConstant(parseState, vec+1)) /* Y */ return GL_FALSE; if (Parse_String(parseState, "}")) { return GL_TRUE; } if (!Parse_String(parseState, ",")) RETURN_ERROR1("Expected comma in vector constant"); if (!Parse_ScalarConstant(parseState, vec+2)) /* Z */ return GL_FALSE; if (Parse_String(parseState, "}")) { return GL_TRUE; } if (!Parse_String(parseState, ",")) RETURN_ERROR1("Expected comma in vector constant"); if (!Parse_ScalarConstant(parseState, vec+3)) /* W */ return GL_FALSE; if (!Parse_String(parseState, "}")) RETURN_ERROR1("Expected closing brace in vector constant"); return GL_TRUE; } /** * Parse <number>, <varname> or {a, b, c, d}. * Return number of values in the vector or scalar, or zero if parse error. */ static GLuint Parse_VectorOrScalarConstant(struct parse_state *parseState, GLfloat *vec) { if (Parse_String(parseState, "{")) { return Parse_VectorConstant(parseState, vec); } else { GLboolean b = Parse_ScalarConstant(parseState, vec); if (b) { vec[1] = vec[2] = vec[3] = vec[0]; } return b; } } /** * Parse a texture image source: * [TEX0 | TEX1 | .. | TEX15] , [1D | 2D | 3D | CUBE | RECT] */ static GLboolean Parse_TextureImageId(struct parse_state *parseState, GLubyte *texUnit, GLubyte *texTarget) { GLubyte imageSrc[100]; GLint unit; if (!Parse_Token(parseState, imageSrc)) RETURN_ERROR; if (imageSrc[0] != 'T' || imageSrc[1] != 'E' || imageSrc[2] != 'X') { RETURN_ERROR1("Expected TEX# source"); } unit = atoi((const char *) imageSrc + 3); if ((unit < 0 || unit > MAX_TEXTURE_IMAGE_UNITS) || (unit == 0 && (imageSrc[3] != '0' || imageSrc[4] != 0))) { RETURN_ERROR1("Invalied TEX# source index"); } *texUnit = unit; if (!Parse_String(parseState, ",")) RETURN_ERROR1("Expected ,"); if (Parse_String(parseState, "1D")) { *texTarget = TEXTURE_1D_INDEX; } else if (Parse_String(parseState, "2D")) { *texTarget = TEXTURE_2D_INDEX; } else if (Parse_String(parseState, "3D")) { *texTarget = TEXTURE_3D_INDEX; } else if (Parse_String(parseState, "CUBE")) { *texTarget = TEXTURE_CUBE_INDEX; } else if (Parse_String(parseState, "RECT")) { *texTarget = TEXTURE_RECT_INDEX; } else { RETURN_ERROR1("Invalid texture target token"); } /* update record of referenced texture units */ parseState->texturesUsed[*texUnit] |= (1 << *texTarget); if (_mesa_bitcount(parseState->texturesUsed[*texUnit]) > 1) { RETURN_ERROR1("Only one texture target can be used per texture unit."); } return GL_TRUE; } /** * Parse a scalar suffix like .x, .y, .z or .w or parse a swizzle suffix * like .wxyz, .xxyy, etc and return the swizzle indexes. */ static GLboolean Parse_SwizzleSuffix(const GLubyte *token, GLuint swizzle[4]) { if (token[1] == 0) { /* single letter swizzle (scalar) */ if (token[0] == 'x') ASSIGN_4V(swizzle, 0, 0, 0, 0); else if (token[0] == 'y') ASSIGN_4V(swizzle, 1, 1, 1, 1); else if (token[0] == 'z') ASSIGN_4V(swizzle, 2, 2, 2, 2); else if (token[0] == 'w') ASSIGN_4V(swizzle, 3, 3, 3, 3); else return GL_FALSE; } else { /* 4-component swizzle (vector) */ GLint k; for (k = 0; k < 4 && token[k]; k++) { if (token[k] == 'x') swizzle[k] = 0; else if (token[k] == 'y') swizzle[k] = 1; else if (token[k] == 'z') swizzle[k] = 2; else if (token[k] == 'w') swizzle[k] = 3; else return GL_FALSE; } if (k != 4) return GL_FALSE; } return GL_TRUE; } static GLboolean Parse_CondCodeMask(struct parse_state *parseState, struct prog_dst_register *dstReg) { if (Parse_String(parseState, "EQ")) dstReg->CondMask = COND_EQ; else if (Parse_String(parseState, "GE")) dstReg->CondMask = COND_GE; else if (Parse_String(parseState, "GT")) dstReg->CondMask = COND_GT; else if (Parse_String(parseState, "LE")) dstReg->CondMask = COND_LE; else if (Parse_String(parseState, "LT")) dstReg->CondMask = COND_LT; else if (Parse_String(parseState, "NE")) dstReg->CondMask = COND_NE; else if (Parse_String(parseState, "TR")) dstReg->CondMask = COND_TR; else if (Parse_String(parseState, "FL")) dstReg->CondMask = COND_FL; else RETURN_ERROR1("Invalid condition code mask"); /* look for optional .xyzw swizzle */ if (Parse_String(parseState, ".")) { GLubyte token[100]; GLuint swz[4]; if (!Parse_Token(parseState, token)) /* get xyzw suffix */ RETURN_ERROR; if (!Parse_SwizzleSuffix(token, swz)) RETURN_ERROR1("Invalid swizzle suffix"); dstReg->CondSwizzle = MAKE_SWIZZLE4(swz[0], swz[1], swz[2], swz[3]); } return GL_TRUE; } /** * Parse a temporary register: Rnn or Hnn */ static GLboolean Parse_TempReg(struct parse_state *parseState, GLint *tempRegNum) { GLubyte token[100]; /* Should be 'R##' or 'H##' */ if (!Parse_Token(parseState, token)) RETURN_ERROR; if (token[0] != 'R' && token[0] != 'H') RETURN_ERROR1("Expected R## or H##"); if (IsDigit(token[1])) { GLint reg = atoi((const char *) (token + 1)); if (token[0] == 'H') reg += 32; if (reg >= MAX_NV_FRAGMENT_PROGRAM_TEMPS) RETURN_ERROR1("Invalid temporary register name"); *tempRegNum = reg; } else { RETURN_ERROR1("Invalid temporary register name"); } return GL_TRUE; } /** * Parse a write-only dummy register: RC or HC. */ static GLboolean Parse_DummyReg(struct parse_state *parseState, GLint *regNum) { if (Parse_String(parseState, "RC")) { *regNum = 0; } else if (Parse_String(parseState, "HC")) { *regNum = 1; } else { RETURN_ERROR1("Invalid write-only register name"); } return GL_TRUE; } /** * Parse a program local parameter register "p[##]" */ static GLboolean Parse_ProgramParamReg(struct parse_state *parseState, GLint *regNum) { GLubyte token[100]; if (!Parse_String(parseState, "p[")) RETURN_ERROR1("Expected p["); if (!Parse_Token(parseState, token)) RETURN_ERROR; if (IsDigit(token[0])) { /* a numbered program parameter register */ GLint reg = atoi((const char *) token); if (reg >= MAX_NV_FRAGMENT_PROGRAM_PARAMS) RETURN_ERROR1("Invalid constant program number"); *regNum = reg; } else { RETURN_ERROR; } if (!Parse_String(parseState, "]")) RETURN_ERROR1("Expected ]"); return GL_TRUE; } /** * Parse f[name] - fragment input register */ static GLboolean Parse_FragReg(struct parse_state *parseState, GLint *tempRegNum) { GLubyte token[100]; GLint j; /* Match 'f[' */ if (!Parse_String(parseState, "f[")) RETURN_ERROR1("Expected f["); /* get <name> and look for match */ if (!Parse_Token(parseState, token)) { RETURN_ERROR; } for (j = 0; InputRegisters[j]; j++) { if (strcmp((const char *) token, InputRegisters[j]) == 0) { *tempRegNum = j; parseState->inputsRead |= (1 << j); break; } } if (!InputRegisters[j]) { /* unknown input register label */ RETURN_ERROR2("Invalid register name", token); } /* Match '[' */ if (!Parse_String(parseState, "]")) RETURN_ERROR1("Expected ]"); return GL_TRUE; } static GLboolean Parse_OutputReg(struct parse_state *parseState, GLint *outputRegNum) { GLubyte token[100]; /* Match "o[" */ if (!Parse_String(parseState, "o[")) RETURN_ERROR1("Expected o["); /* Get output reg name */ if (!Parse_Token(parseState, token)) RETURN_ERROR; /* try to match an output register name */ if (strcmp((char *) token, "COLR") == 0 || strcmp((char *) token, "COLH") == 0) { /* note that we don't distinguish between COLR and COLH */ *outputRegNum = FRAG_RESULT_COLOR; parseState->outputsWritten |= (1 << FRAG_RESULT_COLOR); } else if (strcmp((char *) token, "DEPR") == 0) { *outputRegNum = FRAG_RESULT_DEPTH; parseState->outputsWritten |= (1 << FRAG_RESULT_DEPTH); } else { RETURN_ERROR1("Invalid output register name"); } /* Match ']' */ if (!Parse_String(parseState, "]")) RETURN_ERROR1("Expected ]"); return GL_TRUE; } static GLboolean Parse_MaskedDstReg(struct parse_state *parseState, struct prog_dst_register *dstReg) { GLubyte token[100]; GLint idx; /* Dst reg can be R<n>, H<n>, o[n], RC or HC */ if (!Peek_Token(parseState, token)) RETURN_ERROR; if (strcmp((const char *) token, "RC") == 0 || strcmp((const char *) token, "HC") == 0) { /* a write-only register */ dstReg->File = PROGRAM_WRITE_ONLY; if (!Parse_DummyReg(parseState, &idx)) RETURN_ERROR; dstReg->Index = idx; } else if (token[0] == 'R' || token[0] == 'H') { /* a temporary register */ dstReg->File = PROGRAM_TEMPORARY; if (!Parse_TempReg(parseState, &idx)) RETURN_ERROR; dstReg->Index = idx; } else if (token[0] == 'o') { /* an output register */ dstReg->File = PROGRAM_OUTPUT; if (!Parse_OutputReg(parseState, &idx)) RETURN_ERROR; dstReg->Index = idx; } else { RETURN_ERROR1("Invalid destination register name"); } /* Parse optional write mask */ if (Parse_String(parseState, ".")) { /* got a mask */ GLint k = 0; if (!Parse_Token(parseState, token)) /* get xyzw writemask */ RETURN_ERROR; dstReg->WriteMask = 0; if (token[k] == 'x') { dstReg->WriteMask |= WRITEMASK_X; k++; } if (token[k] == 'y') { dstReg->WriteMask |= WRITEMASK_Y; k++; } if (token[k] == 'z') { dstReg->WriteMask |= WRITEMASK_Z; k++; } if (token[k] == 'w') { dstReg->WriteMask |= WRITEMASK_W; k++; } if (k == 0) { RETURN_ERROR1("Invalid writemask character"); } } else { dstReg->WriteMask = WRITEMASK_XYZW; } /* optional condition code mask */ if (Parse_String(parseState, "(")) { /* ("EQ" | "GE" | "GT" | "LE" | "LT" | "NE" | "TR" | "FL".x|y|z|w) */ /* ("EQ" | "GE" | "GT" | "LE" | "LT" | "NE" | "TR" | "FL".[xyzw]) */ if (!Parse_CondCodeMask(parseState, dstReg)) RETURN_ERROR; if (!Parse_String(parseState, ")")) /* consume ")" */ RETURN_ERROR1("Expected )"); return GL_TRUE; } else { /* no cond code mask */ dstReg->CondMask = COND_TR; dstReg->CondSwizzle = SWIZZLE_NOOP; return GL_TRUE; } } /** * Parse a vector source (register, constant, etc): * <vectorSrc> ::= <absVectorSrc> * | <baseVectorSrc> * <absVectorSrc> ::= <negate> "|" <baseVectorSrc> "|" */ static GLboolean Parse_VectorSrc(struct parse_state *parseState, struct prog_src_register *srcReg) { GLfloat sign = 1.0F; GLubyte token[100]; GLint idx; GLuint negateBase, negateAbs; /* * First, take care of +/- and absolute value stuff. */ if (Parse_String(parseState, "-")) sign = -1.0F; else if (Parse_String(parseState, "+")) sign = +1.0F; if (Parse_String(parseState, "|")) { srcReg->Abs = GL_TRUE; negateAbs = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE; if (Parse_String(parseState, "-")) negateBase = NEGATE_XYZW; else if (Parse_String(parseState, "+")) negateBase = NEGATE_NONE; else negateBase = NEGATE_NONE; } else { srcReg->Abs = GL_FALSE; negateAbs = NEGATE_NONE; negateBase = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE; } srcReg->Negate = srcReg->Abs ? negateAbs : negateBase; /* This should be the real src vector/register name */ if (!Peek_Token(parseState, token)) RETURN_ERROR; /* Src reg can be Rn, Hn, f[n], p[n], a named parameter, a scalar * literal or vector literal. */ if (token[0] == 'R' || token[0] == 'H') { srcReg->File = PROGRAM_TEMPORARY; if (!Parse_TempReg(parseState, &idx)) RETURN_ERROR; srcReg->Index = idx; } else if (token[0] == 'f') { /* XXX this might be an identifier! */ srcReg->File = PROGRAM_INPUT; if (!Parse_FragReg(parseState, &idx)) RETURN_ERROR; srcReg->Index = idx; } else if (token[0] == 'p') { /* XXX this might be an identifier! */ srcReg->File = PROGRAM_LOCAL_PARAM; if (!Parse_ProgramParamReg(parseState, &idx)) RETURN_ERROR; srcReg->Index = idx; } else if (IsLetter(token[0])){ GLubyte ident[100]; GLint paramIndex; if (!Parse_Identifier(parseState, ident)) RETURN_ERROR; paramIndex = _mesa_lookup_parameter_index(parseState->parameters, -1, (const char *) ident); if (paramIndex < 0) { RETURN_ERROR2("Undefined constant or parameter: ", ident); } srcReg->File = PROGRAM_NAMED_PARAM; srcReg->Index = paramIndex; } else if (IsDigit(token[0]) || token[0] == '-' || token[0] == '+' || token[0] == '.'){ /* literal scalar constant */ GLfloat values[4]; GLuint paramIndex; if (!Parse_ScalarConstant(parseState, values)) RETURN_ERROR; paramIndex = _mesa_add_unnamed_constant(parseState->parameters, (gl_constant_value *) values, 4, NULL); srcReg->File = PROGRAM_NAMED_PARAM; srcReg->Index = paramIndex; } else if (token[0] == '{'){ /* literal vector constant */ GLfloat values[4]; GLuint paramIndex; (void) Parse_String(parseState, "{"); if (!Parse_VectorConstant(parseState, values)) RETURN_ERROR; paramIndex = _mesa_add_unnamed_constant(parseState->parameters, (gl_constant_value *) values, 4, NULL); srcReg->File = PROGRAM_NAMED_PARAM; srcReg->Index = paramIndex; } else { RETURN_ERROR2("Invalid source register name", token); } /* init swizzle fields */ srcReg->Swizzle = SWIZZLE_NOOP; /* Look for optional swizzle suffix */ if (Parse_String(parseState, ".")) { GLuint swz[4]; if (!Parse_Token(parseState, token)) RETURN_ERROR; if (!Parse_SwizzleSuffix(token, swz)) RETURN_ERROR1("Invalid swizzle suffix"); srcReg->Swizzle = MAKE_SWIZZLE4(swz[0], swz[1], swz[2], swz[3]); } /* Finish absolute value */ if (srcReg->Abs && !Parse_String(parseState, "|")) { RETURN_ERROR1("Expected |"); } return GL_TRUE; } static GLboolean Parse_ScalarSrcReg(struct parse_state *parseState, struct prog_src_register *srcReg) { GLubyte token[100]; GLfloat sign = 1.0F; GLboolean needSuffix = GL_TRUE; GLint idx; GLuint negateBase, negateAbs; /* * First, take care of +/- and absolute value stuff. */ if (Parse_String(parseState, "-")) sign = -1.0F; else if (Parse_String(parseState, "+")) sign = +1.0F; if (Parse_String(parseState, "|")) { srcReg->Abs = GL_TRUE; negateAbs = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE; if (Parse_String(parseState, "-")) negateBase = NEGATE_XYZW; else if (Parse_String(parseState, "+")) negateBase = NEGATE_NONE; else negateBase = NEGATE_NONE; } else { srcReg->Abs = GL_FALSE; negateAbs = NEGATE_NONE; negateBase = (sign < 0.0F) ? NEGATE_XYZW : NEGATE_NONE; } srcReg->Negate = srcReg->Abs ? negateAbs : negateBase; if (!Peek_Token(parseState, token)) RETURN_ERROR; /* Src reg can be R<n>, H<n> or a named fragment attrib */ if (token[0] == 'R' || token[0] == 'H') { srcReg->File = PROGRAM_TEMPORARY; if (!Parse_TempReg(parseState, &idx)) RETURN_ERROR; srcReg->Index = idx; } else if (token[0] == 'f') { srcReg->File = PROGRAM_INPUT; if (!Parse_FragReg(parseState, &idx)) RETURN_ERROR; srcReg->Index = idx; } else if (token[0] == '{') { /* vector literal */ GLfloat values[4]; GLuint paramIndex; (void) Parse_String(parseState, "{"); if (!Parse_VectorConstant(parseState, values)) RETURN_ERROR; paramIndex = _mesa_add_unnamed_constant(parseState->parameters, (gl_constant_value *) values, 4, NULL); srcReg->File = PROGRAM_NAMED_PARAM; srcReg->Index = paramIndex; } else if (IsLetter(token[0])){ /* named param/constant */ GLubyte ident[100]; GLint paramIndex; if (!Parse_Identifier(parseState, ident)) RETURN_ERROR; paramIndex = _mesa_lookup_parameter_index(parseState->parameters, -1, (const char *) ident); if (paramIndex < 0) { RETURN_ERROR2("Undefined constant or parameter: ", ident); } srcReg->File = PROGRAM_NAMED_PARAM; srcReg->Index = paramIndex; } else if (IsDigit(token[0])) { /* scalar literal */ GLfloat values[4]; GLuint paramIndex; if (!Parse_ScalarConstant(parseState, values)) RETURN_ERROR; paramIndex = _mesa_add_unnamed_constant(parseState->parameters, (gl_constant_value *) values, 4, NULL); srcReg->Index = paramIndex; srcReg->File = PROGRAM_NAMED_PARAM; needSuffix = GL_FALSE; } else { RETURN_ERROR2("Invalid scalar source argument", token); } srcReg->Swizzle = 0; if (needSuffix) { /* parse .[xyzw] suffix */ if (!Parse_String(parseState, ".")) RETURN_ERROR1("Expected ."); if (!Parse_Token(parseState, token)) RETURN_ERROR; if (token[0] == 'x' && token[1] == 0) { srcReg->Swizzle = 0; } else if (token[0] == 'y' && token[1] == 0) { srcReg->Swizzle = 1; } else if (token[0] == 'z' && token[1] == 0) { srcReg->Swizzle = 2; } else if (token[0] == 'w' && token[1] == 0) { srcReg->Swizzle = 3; } else { RETURN_ERROR1("Invalid scalar source suffix"); } } /* Finish absolute value */ if (srcReg->Abs && !Parse_String(parseState, "|")) { RETURN_ERROR1("Expected |"); } return GL_TRUE; } static GLboolean Parse_PrintInstruction(struct parse_state *parseState, struct prog_instruction *inst) { const GLubyte *str; GLubyte *msg; GLuint len; GLint idx; /* The first argument is a literal string 'just like this' */ if (!Parse_String(parseState, "'")) RETURN_ERROR1("Expected '"); str = parseState->pos; for (len = 0; str[len] != '\''; len++) /* find closing quote */ ; parseState->pos += len + 1; msg = (GLubyte*) malloc(len + 1); memcpy(msg, str, len); msg[len] = 0; inst->Data = msg; if (Parse_String(parseState, ",")) { /* got an optional register to print */ GLubyte token[100]; GetToken(parseState, token); if (token[0] == 'o') { /* dst reg */ if (!Parse_OutputReg(parseState, &idx)) RETURN_ERROR; inst->SrcReg[0].Index = idx; inst->SrcReg[0].File = PROGRAM_OUTPUT; } else { /* src reg */ if (!Parse_VectorSrc(parseState, &inst->SrcReg[0])) RETURN_ERROR; } } else { inst->SrcReg[0].File = PROGRAM_UNDEFINED; } inst->SrcReg[0].Swizzle = SWIZZLE_NOOP; inst->SrcReg[0].Abs = GL_FALSE; inst->SrcReg[0].Negate = NEGATE_NONE; return GL_TRUE; } static GLboolean Parse_InstructionSequence(struct parse_state *parseState, struct prog_instruction program[]) { while (1) { struct prog_instruction *inst = program + parseState->numInst; struct instruction_pattern instMatch; GLubyte token[100]; /* Initialize the instruction */ _mesa_init_instructions(inst, 1); /* special instructions */ if (Parse_String(parseState, "DEFINE")) { GLubyte id[100]; GLfloat value[7]; /* yes, 7 to be safe */ if (!Parse_Identifier(parseState, id)) RETURN_ERROR; /* XXX make sure id is not a reserved identifer, like R9 */ if (!Parse_String(parseState, "=")) RETURN_ERROR1("Expected ="); if (!Parse_VectorOrScalarConstant(parseState, value)) RETURN_ERROR; if (!Parse_String(parseState, ";")) RETURN_ERROR1("Expected ;"); if (_mesa_lookup_parameter_index(parseState->parameters, -1, (const char *) id) >= 0) { RETURN_ERROR2(id, "already defined"); } _mesa_add_named_parameter(parseState->parameters, (const char *) id, (gl_constant_value *) value); } else if (Parse_String(parseState, "DECLARE")) { GLubyte id[100]; GLfloat value[7] = {0, 0, 0, 0, 0, 0, 0}; /* yes, to be safe */ if (!Parse_Identifier(parseState, id)) RETURN_ERROR; /* XXX make sure id is not a reserved identifer, like R9 */ if (Parse_String(parseState, "=")) { if (!Parse_VectorOrScalarConstant(parseState, value)) RETURN_ERROR; } if (!Parse_String(parseState, ";")) RETURN_ERROR1("Expected ;"); if (_mesa_lookup_parameter_index(parseState->parameters, -1, (const char *) id) >= 0) { RETURN_ERROR2(id, "already declared"); } _mesa_add_named_parameter(parseState->parameters, (const char *) id, (gl_constant_value *) value); } else if (Parse_String(parseState, "END")) { inst->Opcode = OPCODE_END; parseState->numInst++; if (Parse_Token(parseState, token)) { RETURN_ERROR1("Code after END opcode."); } break; } else { /* general/arithmetic instruction */ /* get token */ if (!Parse_Token(parseState, token)) { RETURN_ERROR1("Missing END instruction."); } /* try to find matching instuction */ instMatch = MatchInstruction(token); if (instMatch.opcode >= MAX_OPCODE) { /* bad instruction name */ RETURN_ERROR2("Unexpected token: ", token); } inst->Opcode = instMatch.opcode; inst->Precision = instMatch.suffixes & (_R | _H | _X); inst->SaturateMode = (instMatch.suffixes & (_S)) ? SATURATE_ZERO_ONE : SATURATE_OFF; inst->CondUpdate = (instMatch.suffixes & (_C)) ? GL_TRUE : GL_FALSE; /* * parse the input and output operands */ if (instMatch.outputs == OUTPUT_S || instMatch.outputs == OUTPUT_V) { if (!Parse_MaskedDstReg(parseState, &inst->DstReg)) RETURN_ERROR; if (!Parse_String(parseState, ",")) RETURN_ERROR1("Expected ,"); } else if (instMatch.outputs == OUTPUT_NONE) { if (instMatch.opcode == OPCODE_KIL_NV) { /* This is a little weird, the cond code info is in * the dest register. */ if (!Parse_CondCodeMask(parseState, &inst->DstReg)) RETURN_ERROR; } else { ASSERT(instMatch.opcode == OPCODE_PRINT); } } if (instMatch.inputs == INPUT_1V) { if (!Parse_VectorSrc(parseState, &inst->SrcReg[0])) RETURN_ERROR; } else if (instMatch.inputs == INPUT_2V) { if (!Parse_VectorSrc(parseState, &inst->SrcReg[0])) RETURN_ERROR; if (!Parse_String(parseState, ",")) RETURN_ERROR1("Expected ,"); if (!Parse_VectorSrc(parseState, &inst->SrcReg[1])) RETURN_ERROR; } else if (instMatch.inputs == INPUT_3V) { if (!Parse_VectorSrc(parseState, &inst->SrcReg[0])) RETURN_ERROR; if (!Parse_String(parseState, ",")) RETURN_ERROR1("Expected ,"); if (!Parse_VectorSrc(parseState, &inst->SrcReg[1])) RETURN_ERROR; if (!Parse_String(parseState, ",")) RETURN_ERROR1("Expected ,"); if (!Parse_VectorSrc(parseState, &inst->SrcReg[2])) RETURN_ERROR; } else if (instMatch.inputs == INPUT_1S) { if (!Parse_ScalarSrcReg(parseState, &inst->SrcReg[0])) RETURN_ERROR; } else if (instMatch.inputs == INPUT_2S) { if (!Parse_ScalarSrcReg(parseState, &inst->SrcReg[0])) RETURN_ERROR; if (!Parse_String(parseState, ",")) RETURN_ERROR1("Expected ,"); if (!Parse_ScalarSrcReg(parseState, &inst->SrcReg[1])) RETURN_ERROR; } else if (instMatch.inputs == INPUT_CC) { /* XXX to-do */ } else if (instMatch.inputs == INPUT_1V_T) { GLubyte unit, idx; if (!Parse_VectorSrc(parseState, &inst->SrcReg[0])) RETURN_ERROR; if (!Parse_String(parseState, ",")) RETURN_ERROR1("Expected ,"); if (!Parse_TextureImageId(parseState, &unit, &idx)) RETURN_ERROR; inst->TexSrcUnit = unit; inst->TexSrcTarget = idx; } else if (instMatch.inputs == INPUT_3V_T) { GLubyte unit, idx; if (!Parse_VectorSrc(parseState, &inst->SrcReg[0])) RETURN_ERROR; if (!Parse_String(parseState, ",")) RETURN_ERROR1("Expected ,"); if (!Parse_VectorSrc(parseState, &inst->SrcReg[1])) RETURN_ERROR; if (!Parse_String(parseState, ",")) RETURN_ERROR1("Expected ,"); if (!Parse_VectorSrc(parseState, &inst->SrcReg[2])) RETURN_ERROR; if (!Parse_String(parseState, ",")) RETURN_ERROR1("Expected ,"); if (!Parse_TextureImageId(parseState, &unit, &idx)) RETURN_ERROR; inst->TexSrcUnit = unit; inst->TexSrcTarget = idx; } else if (instMatch.inputs == INPUT_1V_S) { if (!Parse_PrintInstruction(parseState, inst)) RETURN_ERROR; } /* end of statement semicolon */ if (!Parse_String(parseState, ";")) RETURN_ERROR1("Expected ;"); parseState->numInst++; if (parseState->numInst >= MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS) RETURN_ERROR1("Program too long"); } } return GL_TRUE; } /** * Parse/compile the 'str' returning the compiled 'program'. * ctx->Program.ErrorPos will be -1 if successful. Otherwise, ErrorPos * indicates the position of the error in 'str'. */ void _mesa_parse_nv_fragment_program(struct gl_context *ctx, GLenum dstTarget, const GLubyte *str, GLsizei len, struct gl_fragment_program *program) { struct parse_state parseState; struct prog_instruction instBuffer[MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS]; struct prog_instruction *newInst; GLenum target; GLubyte *programString; /* Make a null-terminated copy of the program string */ programString = (GLubyte *) MALLOC(len + 1); if (!programString) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glLoadProgramNV"); return; } memcpy(programString, str, len); programString[len] = 0; /* Get ready to parse */ memset(&parseState, 0, sizeof(struct parse_state)); parseState.ctx = ctx; parseState.start = programString; parseState.program = program; parseState.numInst = 0; parseState.curLine = programString; parseState.parameters = _mesa_new_parameter_list(); /* Reset error state */ _mesa_set_program_error(ctx, -1, NULL); /* check the program header */ if (strncmp((const char *) programString, "!!FP1.0", 7) == 0) { target = GL_FRAGMENT_PROGRAM_NV; parseState.pos = programString + 7; } else if (strncmp((const char *) programString, "!!FCP1.0", 8) == 0) { /* fragment / register combiner program - not supported */ _mesa_set_program_error(ctx, 0, "Invalid fragment program header"); _mesa_error(ctx, GL_INVALID_OPERATION, "glLoadProgramNV(bad header)"); return; } else { /* invalid header */ _mesa_set_program_error(ctx, 0, "Invalid fragment program header"); _mesa_error(ctx, GL_INVALID_OPERATION, "glLoadProgramNV(bad header)"); return; } /* make sure target and header match */ if (target != dstTarget) { _mesa_error(ctx, GL_INVALID_OPERATION, "glLoadProgramNV(target mismatch 0x%x != 0x%x)", target, dstTarget); return; } if (Parse_InstructionSequence(&parseState, instBuffer)) { GLuint u; /* successful parse! */ if (parseState.outputsWritten == 0) { /* must write at least one output! */ _mesa_error(ctx, GL_INVALID_OPERATION, "Invalid fragment program - no outputs written."); return; } /* copy the compiled instructions */ assert(parseState.numInst <= MAX_NV_FRAGMENT_PROGRAM_INSTRUCTIONS); newInst = _mesa_alloc_instructions(parseState.numInst); if (!newInst) { _mesa_error(ctx, GL_OUT_OF_MEMORY, "glLoadProgramNV"); return; /* out of memory */ } _mesa_copy_instructions(newInst, instBuffer, parseState.numInst); /* install the program */ program->Base.Target = target; if (program->Base.String) { FREE(program->Base.String); } program->Base.String = programString; program->Base.Format = GL_PROGRAM_FORMAT_ASCII_ARB; if (program->Base.Instructions) { free(program->Base.Instructions); } program->Base.Instructions = newInst; program->Base.NumInstructions = parseState.numInst; program->Base.InputsRead = parseState.inputsRead; program->Base.OutputsWritten = parseState.outputsWritten; for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) program->Base.TexturesUsed[u] = parseState.texturesUsed[u]; /* save program parameters */ program->Base.Parameters = parseState.parameters; /* allocate registers for declared program parameters */ #if 00 _mesa_assign_program_registers(&(program->SymbolTable)); #endif #ifdef DEBUG_foo printf("--- glLoadProgramNV(%d) result ---\n", program->Base.Id); _mesa_fprint_program_opt(stdout, &program->Base, PROG_PRINT_NV, 0); printf("----------------------------------\n"); #endif } else { /* Error! */ _mesa_error(ctx, GL_INVALID_OPERATION, "glLoadProgramNV"); /* NOTE: _mesa_set_program_error would have been called already */ } } const char * _mesa_nv_fragment_input_register_name(GLuint i) { ASSERT(i < MAX_NV_FRAGMENT_PROGRAM_INPUTS); return InputRegisters[i]; }