/************************************************************************** * * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. * 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, sub license, 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 (including the * next paragraph) 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 NON-INFRINGEMENT. * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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. * **************************************************************************/ #include "glheader.h" #include "macros.h" #include "enums.h" #include "texenvprogram.h" #include "shader/program.h" #include "shader/nvfragprog.h" #include "shader/arbfragparse.h" #define DISASSEM (MESA_VERBOSE & VERBOSE_DISASSEM) struct mode_opt { unsigned Source:4; unsigned Operand:3; }; struct state_key { GLuint enabled_units; unsigned separate_specular:1; unsigned fog_enabled:1; unsigned fog_mode:2; struct { unsigned enabled:1; unsigned source_index:3; unsigned ScaleShiftRGB:2; unsigned ScaleShiftA:2; unsigned NumArgsRGB:2; unsigned ModeRGB:4; struct mode_opt OptRGB[3]; unsigned NumArgsA:2; unsigned ModeA:4; struct mode_opt OptA[3]; } unit[8]; }; #define FOG_LINEAR 0 #define FOG_EXP 1 #define FOG_EXP2 2 #define FOG_UNKNOWN 3 static GLuint translate_fog_mode( GLenum mode ) { switch (mode) { case GL_LINEAR: return FOG_LINEAR; case GL_EXP: return FOG_EXP; case GL_EXP2: return FOG_EXP2; default: return FOG_UNKNOWN; } } #define OPR_SRC_COLOR 0 #define OPR_ONE_MINUS_SRC_COLOR 1 #define OPR_SRC_ALPHA 2 #define OPR_ONE_MINUS_SRC_ALPHA 3 #define OPR_ZERO 4 #define OPR_ONE 5 #define OPR_UNKNOWN 7 static GLuint translate_operand( GLenum operand ) { switch (operand) { case GL_SRC_COLOR: return OPR_SRC_COLOR; case GL_ONE_MINUS_SRC_COLOR: return OPR_ONE_MINUS_SRC_COLOR; case GL_SRC_ALPHA: return OPR_SRC_ALPHA; case GL_ONE_MINUS_SRC_ALPHA: return OPR_ONE_MINUS_SRC_ALPHA; case GL_ZERO: return OPR_ZERO; case GL_ONE: return OPR_ONE; default: return OPR_UNKNOWN; } } #define SRC_TEXTURE 0 #define SRC_TEXTURE0 1 #define SRC_TEXTURE1 2 #define SRC_TEXTURE2 3 #define SRC_TEXTURE3 4 #define SRC_TEXTURE4 5 #define SRC_TEXTURE5 6 #define SRC_TEXTURE6 7 #define SRC_TEXTURE7 8 #define SRC_CONSTANT 9 #define SRC_PRIMARY_COLOR 10 #define SRC_PREVIOUS 11 #define SRC_UNKNOWN 15 static GLuint translate_source( GLenum src ) { switch (src) { case GL_TEXTURE: return SRC_TEXTURE; case GL_TEXTURE0: case GL_TEXTURE1: case GL_TEXTURE2: case GL_TEXTURE3: case GL_TEXTURE4: case GL_TEXTURE5: case GL_TEXTURE6: case GL_TEXTURE7: return SRC_TEXTURE0 + (src - GL_TEXTURE0); case GL_CONSTANT: return SRC_CONSTANT; case GL_PRIMARY_COLOR: return SRC_PRIMARY_COLOR; case GL_PREVIOUS: return SRC_PREVIOUS; default: return SRC_UNKNOWN; } } #define MODE_REPLACE 0 #define MODE_MODULATE 1 #define MODE_ADD 2 #define MODE_ADD_SIGNED 3 #define MODE_INTERPOLATE 4 #define MODE_SUBTRACT 5 #define MODE_DOT3_RGB 6 #define MODE_DOT3_RGB_EXT 7 #define MODE_DOT3_RGBA 8 #define MODE_DOT3_RGBA_EXT 9 #define MODE_MODULATE_ADD_ATI 10 #define MODE_MODULATE_SIGNED_ADD_ATI 11 #define MODE_MODULATE_SUBTRACT_ATI 12 #define MODE_UNKNOWN 15 static GLuint translate_mode( GLenum mode ) { switch (mode) { case GL_REPLACE: return MODE_REPLACE; case GL_MODULATE: return MODE_MODULATE; case GL_ADD: return MODE_ADD; case GL_ADD_SIGNED: return MODE_ADD_SIGNED; case GL_INTERPOLATE: return MODE_INTERPOLATE; case GL_SUBTRACT: return MODE_SUBTRACT; case GL_DOT3_RGB: return MODE_DOT3_RGB; case GL_DOT3_RGB_EXT: return MODE_DOT3_RGB_EXT; case GL_DOT3_RGBA: return MODE_DOT3_RGBA; case GL_DOT3_RGBA_EXT: return MODE_DOT3_RGBA_EXT; case GL_MODULATE_ADD_ATI: return MODE_MODULATE_ADD_ATI; case GL_MODULATE_SIGNED_ADD_ATI: return MODE_MODULATE_SIGNED_ADD_ATI; case GL_MODULATE_SUBTRACT_ATI: return MODE_MODULATE_SUBTRACT_ATI; default: return MODE_UNKNOWN; } } #define TEXTURE_UNKNOWN_INDEX 7 static GLuint translate_tex_src_bit( GLuint bit ) { switch (bit) { case TEXTURE_1D_BIT: return TEXTURE_1D_INDEX; case TEXTURE_2D_BIT: return TEXTURE_2D_INDEX; case TEXTURE_RECT_BIT: return TEXTURE_RECT_INDEX; case TEXTURE_3D_BIT: return TEXTURE_3D_INDEX; case TEXTURE_CUBE_BIT: return TEXTURE_CUBE_INDEX; default: return TEXTURE_UNKNOWN_INDEX; } } static struct state_key *make_state_key( GLcontext *ctx ) { struct state_key *key = CALLOC_STRUCT(state_key); GLuint i, j; for (i=0;iTexture.Unit[i]; if (!texUnit->_ReallyEnabled) continue; key->unit[i].enabled = 1; key->enabled_units |= (1<unit[i].source_index = translate_tex_src_bit(texUnit->_ReallyEnabled); key->unit[i].NumArgsRGB = texUnit->_CurrentCombine->_NumArgsRGB; key->unit[i].NumArgsA = texUnit->_CurrentCombine->_NumArgsA; key->unit[i].ModeRGB = translate_mode(texUnit->_CurrentCombine->ModeRGB); key->unit[i].ModeA = translate_mode(texUnit->_CurrentCombine->ModeA); key->unit[i].ScaleShiftRGB = texUnit->_CurrentCombine->ScaleShiftRGB; key->unit[i].ScaleShiftA = texUnit->_CurrentCombine->ScaleShiftRGB; for (j=0;j<3;j++) { key->unit[i].OptRGB[j].Operand = translate_operand(texUnit->_CurrentCombine->OperandRGB[j]); key->unit[i].OptA[j].Operand = translate_operand(texUnit->_CurrentCombine->OperandA[j]); key->unit[i].OptRGB[j].Source = translate_source(texUnit->_CurrentCombine->SourceRGB[j]); key->unit[i].OptA[j].Source = translate_source(texUnit->_CurrentCombine->SourceA[j]); } } if (ctx->_TriangleCaps & DD_SEPARATE_SPECULAR) key->separate_specular = 1; if (ctx->Fog.Enabled) { key->fog_enabled = 1; key->fog_mode = translate_fog_mode(ctx->Fog.Mode); } return key; } /* Use uregs to represent registers internally, translate to Mesa's * expected formats on emit. * * NOTE: These are passed by value extensively in this file rather * than as usual by pointer reference. If this disturbs you, try * remembering they are just 32bits in size. * * GCC is smart enough to deal with these dword-sized structures in * much the same way as if I had defined them as dwords and was using * macros to access and set the fields. This is much nicer and easier * to evolve. */ struct ureg { GLuint file:4; GLuint idx:8; GLuint negatebase:1; GLuint abs:1; GLuint negateabs:1; GLuint swz:12; GLuint pad:5; }; const static struct ureg undef = { ~0, ~0, 0, 0, 0, 0, 0 }; #define X 0 #define Y 1 #define Z 2 #define W 3 /* State used to build the fragment program: */ struct texenv_fragment_program { struct fragment_program *program; GLcontext *ctx; struct state_key *state; GLuint alu_temps; /* Track texture indirections, see spec. */ GLuint temps_output; /* Track texture indirections, see spec. */ GLuint temp_in_use; /* Tracks temporary regs which are in * use. */ GLboolean error; struct ureg src_texture[MAX_TEXTURE_UNITS]; /* Reg containing each texture unit's sampled texture color, * else undef. */ struct ureg src_previous; /* Reg containing color from previous * stage. May need to be decl'd. */ GLuint last_tex_stage; /* Number of last enabled texture unit */ struct ureg half; struct ureg one; struct ureg zero; }; static struct ureg make_ureg(GLuint file, GLuint idx) { struct ureg reg; reg.file = file; reg.idx = idx; reg.negatebase = 0; reg.abs = 0; reg.negateabs = 0; reg.swz = SWIZZLE_NOOP; reg.pad = 0; return reg; } static struct ureg swizzle( struct ureg reg, int x, int y, int z, int w ) { reg.swz = MAKE_SWIZZLE4(GET_SWZ(reg.swz, x), GET_SWZ(reg.swz, y), GET_SWZ(reg.swz, z), GET_SWZ(reg.swz, w)); return reg; } static struct ureg swizzle1( struct ureg reg, int x ) { return swizzle(reg, x, x, x, x); } static struct ureg negate( struct ureg reg ) { reg.negatebase ^= 1; return reg; } static GLboolean is_undef( struct ureg reg ) { return reg.file == 0xf; } static struct ureg get_temp( struct texenv_fragment_program *p ) { int bit; /* First try and reuse temps which have been used already: */ bit = ffs( ~p->temp_in_use & p->alu_temps ); /* Then any unused temporary: */ if (!bit) bit = ffs( ~p->temp_in_use ); if (!bit) { _mesa_problem(NULL, "%s: out of temporaries\n", __FILE__); exit(1); } p->temp_in_use |= 1<<(bit-1); return make_ureg(PROGRAM_TEMPORARY, (bit-1)); } static struct ureg get_tex_temp( struct texenv_fragment_program *p ) { int bit; /* First try to find availble temp not previously used (to avoid * starting a new texture indirection). According to the spec, the * ~p->temps_output isn't necessary, but will keep it there for * now: */ bit = ffs( ~p->temp_in_use & ~p->alu_temps & ~p->temps_output ); /* Then any unused temporary: */ if (!bit) bit = ffs( ~p->temp_in_use ); if (!bit) { _mesa_problem(NULL, "%s: out of temporaries\n", __FILE__); exit(1); } p->temp_in_use |= 1<<(bit-1); return make_ureg(PROGRAM_TEMPORARY, (bit-1)); } static void release_temps( struct texenv_fragment_program *p ) { GLuint max_temp = p->ctx->Const.MaxFragmentProgramTemps; /* KW: To support tex_env_crossbar, don't release the registers in * temps_output. */ if (max_temp >= sizeof(int) * 8) p->temp_in_use = p->temps_output; else p->temp_in_use = ~((1<temps_output; } static struct ureg register_param6( struct texenv_fragment_program *p, GLint s0, GLint s1, GLint s2, GLint s3, GLint s4, GLint s5) { GLint tokens[6]; GLuint idx; tokens[0] = s0; tokens[1] = s1; tokens[2] = s2; tokens[3] = s3; tokens[4] = s4; tokens[5] = s5; idx = _mesa_add_state_reference( p->program->Parameters, tokens ); return make_ureg(PROGRAM_STATE_VAR, idx); } #define register_param1(p,s0) register_param6(p,s0,0,0,0,0,0) #define register_param2(p,s0,s1) register_param6(p,s0,s1,0,0,0,0) #define register_param3(p,s0,s1,s2) register_param6(p,s0,s1,s2,0,0,0) #define register_param4(p,s0,s1,s2,s3) register_param6(p,s0,s1,s2,s3,0,0) static struct ureg register_input( struct texenv_fragment_program *p, GLuint input ) { p->program->InputsRead |= (1<File = ureg.file; reg->Index = ureg.idx; reg->Swizzle = ureg.swz; reg->NegateBase = ureg.negatebase; reg->Abs = ureg.abs; reg->NegateAbs = ureg.negateabs; } static void emit_dst( struct fp_dst_register *dst, struct ureg ureg, GLuint mask ) { dst->File = ureg.file; dst->Index = ureg.idx; dst->WriteMask = mask; dst->CondMask = 0; dst->CondSwizzle = 0; } static struct fp_instruction * emit_op(struct texenv_fragment_program *p, GLuint op, struct ureg dest, GLuint mask, GLuint saturate, struct ureg src0, struct ureg src1, struct ureg src2 ) { GLuint nr = p->program->Base.NumInstructions++; struct fp_instruction *inst = &p->program->Instructions[nr]; memset(inst, 0, sizeof(*inst)); inst->Opcode = op; emit_arg( &inst->SrcReg[0], src0 ); emit_arg( &inst->SrcReg[1], src1 ); emit_arg( &inst->SrcReg[2], src2 ); inst->Saturate = saturate; emit_dst( &inst->DstReg, dest, mask ); /* Accounting for indirection tracking: */ if (dest.file == PROGRAM_TEMPORARY) p->temps_output |= 1 << dest.idx; return inst; } static struct ureg emit_arith( struct texenv_fragment_program *p, GLuint op, struct ureg dest, GLuint mask, GLuint saturate, struct ureg src0, struct ureg src1, struct ureg src2 ) { emit_op(p, op, dest, mask, saturate, src0, src1, src2); /* Accounting for indirection tracking: */ if (src0.file == PROGRAM_TEMPORARY) p->alu_temps |= 1 << src0.idx; if (!is_undef(src1) && src1.file == PROGRAM_TEMPORARY) p->alu_temps |= 1 << src1.idx; if (!is_undef(src2) && src2.file == PROGRAM_TEMPORARY) p->alu_temps |= 1 << src2.idx; if (dest.file == PROGRAM_TEMPORARY) p->alu_temps |= 1 << dest.idx; p->program->NumAluInstructions++; return dest; } static struct ureg emit_texld( struct texenv_fragment_program *p, GLuint op, struct ureg dest, GLuint destmask, GLuint tex_unit, GLuint tex_idx, struct ureg coord ) { struct fp_instruction *inst = emit_op( p, op, dest, destmask, 0, /* don't saturate? */ coord, /* arg 0? */ undef, undef); inst->TexSrcIdx = tex_idx; inst->TexSrcUnit = tex_unit; p->program->NumTexInstructions++; /* Is this a texture indirection? */ if ((coord.file == PROGRAM_TEMPORARY && (p->temps_output & (1<alu_temps & (1<program->NumTexIndirections++; p->temps_output = 1<alu_temps = 0; assert(0); /* KW: texture env crossbar */ } return dest; } static struct ureg register_const4f( struct texenv_fragment_program *p, GLfloat s0, GLfloat s1, GLfloat s2, GLfloat s3) { GLfloat values[4]; GLuint idx; values[0] = s0; values[1] = s1; values[2] = s2; values[3] = s3; idx = _mesa_add_unnamed_constant( p->program->Parameters, values ); return make_ureg(PROGRAM_STATE_VAR, idx); } #define register_scalar_const(p, s0) register_const4f(p, s0, s0, s0, s0) #define register_const1f(p, s0) register_const4f(p, s0, 0, 0, 1) #define register_const2f(p, s0, s1) register_const4f(p, s0, s1, 0, 1) #define register_const3f(p, s0, s1, s2) register_const4f(p, s0, s1, s2, 1) static struct ureg get_one( struct texenv_fragment_program *p ) { if (is_undef(p->one)) p->one = register_scalar_const(p, 1.0); return p->one; } static struct ureg get_half( struct texenv_fragment_program *p ) { if (is_undef(p->half)) p->one = register_scalar_const(p, 0.5); return p->half; } static struct ureg get_zero( struct texenv_fragment_program *p ) { if (is_undef(p->zero)) p->one = register_scalar_const(p, 0.0); return p->zero; } static void program_error( struct texenv_fragment_program *p, const char *msg ) { _mesa_problem(NULL, msg); p->error = 1; } static struct ureg get_source( struct texenv_fragment_program *p, GLuint src, GLuint unit ) { switch (src) { case SRC_TEXTURE: assert(!is_undef(p->src_texture[unit])); return p->src_texture[unit]; case SRC_TEXTURE0: case SRC_TEXTURE1: case SRC_TEXTURE2: case SRC_TEXTURE3: case SRC_TEXTURE4: case SRC_TEXTURE5: case SRC_TEXTURE6: case SRC_TEXTURE7: assert(!is_undef(p->src_texture[src - SRC_TEXTURE0])); return p->src_texture[src - SRC_TEXTURE0]; case SRC_CONSTANT: return register_param2(p, STATE_TEXENV_COLOR, unit); case SRC_PRIMARY_COLOR: return register_input(p, FRAG_ATTRIB_COL0); case SRC_PREVIOUS: default: if (is_undef(p->src_previous)) return register_input(p, FRAG_ATTRIB_COL0); else return p->src_previous; } } static struct ureg emit_combine_source( struct texenv_fragment_program *p, GLuint mask, GLuint unit, GLuint source, GLuint operand ) { struct ureg arg, src, one; src = get_source(p, source, unit); switch (operand) { case OPR_ONE_MINUS_SRC_COLOR: /* Get unused tmp, * Emit tmp = 1.0 - arg.xyzw */ arg = get_temp( p ); one = get_one( p ); return emit_arith( p, FP_OPCODE_SUB, arg, mask, 0, one, src, undef); case OPR_SRC_ALPHA: if (mask == WRITEMASK_W) return src; else return swizzle1( src, W ); case OPR_ONE_MINUS_SRC_ALPHA: /* Get unused tmp, * Emit tmp = 1.0 - arg.wwww */ arg = get_temp(p); one = get_one(p); return emit_arith(p, FP_OPCODE_SUB, arg, mask, 0, one, swizzle1(src, W), undef); case OPR_ZERO: return get_zero(p); case OPR_ONE: return get_one(p); case OPR_SRC_COLOR: default: return src; } } static GLboolean args_match( struct state_key *key, GLuint unit ) { int i, nr = key->unit[unit].NumArgsRGB; for (i = 0 ; i < nr ; i++) { if (key->unit[unit].OptA[i].Source != key->unit[unit].OptRGB[i].Source) return GL_FALSE; switch(key->unit[unit].OptA[i].Operand) { case OPR_SRC_ALPHA: switch(key->unit[unit].OptRGB[i].Operand) { case OPR_SRC_COLOR: case OPR_SRC_ALPHA: break; default: return GL_FALSE; } break; case OPR_ONE_MINUS_SRC_ALPHA: switch(key->unit[unit].OptRGB[i].Operand) { case OPR_ONE_MINUS_SRC_COLOR: case OPR_ONE_MINUS_SRC_ALPHA: break; default: return GL_FALSE; } break; default: return GL_FALSE; /* impossible */ } } return GL_TRUE; } static struct ureg emit_combine( struct texenv_fragment_program *p, struct ureg dest, GLuint mask, GLuint saturate, GLuint unit, GLuint nr, GLuint mode, struct mode_opt *opt) { struct ureg src[3]; struct ureg tmp, half; int i; for (i = 0; i < nr; i++) src[i] = emit_combine_source( p, mask, unit, opt[i].Source, opt[i].Operand ); switch (mode) { case MODE_REPLACE: if (mask == WRITEMASK_XYZW && !saturate) return src[0]; else return emit_arith( p, FP_OPCODE_MOV, dest, mask, saturate, src[0], undef, undef ); case MODE_MODULATE: return emit_arith( p, FP_OPCODE_MUL, dest, mask, saturate, src[0], src[1], undef ); case MODE_ADD: return emit_arith( p, FP_OPCODE_ADD, dest, mask, saturate, src[0], src[1], undef ); case MODE_ADD_SIGNED: /* tmp = arg0 + arg1 * result = tmp - .5 */ half = get_half(p); emit_arith( p, FP_OPCODE_ADD, tmp, mask, 0, src[0], src[1], undef ); emit_arith( p, FP_OPCODE_SUB, dest, mask, saturate, tmp, half, undef ); return dest; case MODE_INTERPOLATE: /* Arg0 * (Arg2) + Arg1 * (1-Arg2) -- note arguments are reordered: */ return emit_arith( p, FP_OPCODE_LRP, dest, mask, saturate, src[2], src[0], src[1] ); case MODE_SUBTRACT: return emit_arith( p, FP_OPCODE_SUB, dest, mask, saturate, src[0], src[1], undef ); case MODE_DOT3_RGBA: case MODE_DOT3_RGBA_EXT: case MODE_DOT3_RGB_EXT: case MODE_DOT3_RGB: { struct ureg tmp0 = get_temp( p ); struct ureg tmp1 = get_temp( p ); struct ureg neg1 = register_scalar_const(p, -1); struct ureg two = register_scalar_const(p, 2); /* tmp0 = 2*src0 - 1 * tmp1 = 2*src1 - 1 * * dst = tmp0 dot3 tmp1 */ emit_arith( p, FP_OPCODE_MAD, tmp0, WRITEMASK_XYZW, 0, two, src[0], neg1); if (memcmp(&src[0], &src[1], sizeof(struct ureg)) == 0) tmp1 = tmp0; else emit_arith( p, FP_OPCODE_MAD, tmp1, WRITEMASK_XYZW, 0, two, src[1], neg1); emit_arith( p, FP_OPCODE_DP3, dest, mask, saturate, tmp0, tmp1, undef); return dest; } case MODE_MODULATE_ADD_ATI: /* Arg0 * Arg2 + Arg1 */ return emit_arith( p, FP_OPCODE_MAD, dest, mask, saturate, src[0], src[2], src[1] ); case MODE_MODULATE_SIGNED_ADD_ATI: { /* Arg0 * Arg2 + Arg1 - 0.5 */ struct ureg tmp0 = get_temp(p); half = get_half(p); emit_arith( p, FP_OPCODE_MAD, tmp0, mask, 0, src[0], src[2], src[1] ); emit_arith( p, FP_OPCODE_SUB, dest, mask, saturate, tmp0, half, undef ); return dest; } case MODE_MODULATE_SUBTRACT_ATI: /* Arg0 * Arg2 - Arg1 */ emit_arith( p, FP_OPCODE_MAD, dest, mask, 0, src[0], src[2], negate(src[1]) ); return dest; default: return src[0]; } } static struct ureg emit_texenv( struct texenv_fragment_program *p, int unit ) { struct state_key *key = p->state; GLuint saturate = (unit < p->last_tex_stage); GLuint rgb_shift, alpha_shift; struct ureg out, shift; struct ureg dest; if (!key->unit[unit].enabled) { return get_source(p, SRC_PREVIOUS, 0); } switch (key->unit[unit].ModeRGB) { case MODE_DOT3_RGB_EXT: alpha_shift = key->unit[unit].ScaleShiftA; rgb_shift = 0; break; case MODE_DOT3_RGBA_EXT: alpha_shift = 0; rgb_shift = 0; break; default: rgb_shift = key->unit[unit].ScaleShiftRGB; alpha_shift = key->unit[unit].ScaleShiftA; break; } /* If this is the very last calculation, emit direct to output reg: */ if (key->separate_specular || unit != p->last_tex_stage || alpha_shift || rgb_shift) dest = get_temp( p ); else dest = make_ureg(PROGRAM_OUTPUT, FRAG_OUTPUT_COLR); /* Emit the RGB and A combine ops */ if (key->unit[unit].ModeRGB == key->unit[unit].ModeA && args_match(key, unit)) { out = emit_combine( p, dest, WRITEMASK_XYZW, saturate, unit, key->unit[unit].NumArgsRGB, key->unit[unit].ModeRGB, key->unit[unit].OptRGB); } else if (key->unit[unit].ModeRGB == MODE_DOT3_RGBA_EXT || key->unit[unit].ModeA == MODE_DOT3_RGBA) { out = emit_combine( p, dest, WRITEMASK_XYZW, saturate, unit, key->unit[unit].NumArgsRGB, key->unit[unit].ModeRGB, key->unit[unit].OptRGB); } else { /* Need to do something to stop from re-emitting identical * argument calculations here: */ out = emit_combine( p, dest, WRITEMASK_XYZ, saturate, unit, key->unit[unit].NumArgsRGB, key->unit[unit].ModeRGB, key->unit[unit].OptRGB); out = emit_combine( p, dest, WRITEMASK_W, saturate, unit, key->unit[unit].NumArgsA, key->unit[unit].ModeA, key->unit[unit].OptA); } /* Deal with the final shift: */ if (alpha_shift || rgb_shift) { if (rgb_shift == alpha_shift) { shift = register_scalar_const(p, 1<src_texture[unit])) { GLuint dim = p->state->unit[unit].source_index; struct ureg texcoord = register_input(p, FRAG_ATTRIB_TEX0+unit); struct ureg tmp = get_tex_temp( p ); if (dim == TEXTURE_UNKNOWN_INDEX) program_error(p, "TexSrcBit"); /* TODO: Use D0_MASK_XY where possible. */ p->src_texture[unit] = emit_texld( p, FP_OPCODE_TXP, tmp, WRITEMASK_XYZW, unit, dim, texcoord ); } } static GLboolean load_texenv_source( struct texenv_fragment_program *p, GLuint src, GLuint unit ) { switch (src) { case SRC_TEXTURE: load_texture(p, unit); break; case SRC_TEXTURE0: case SRC_TEXTURE1: case SRC_TEXTURE2: case SRC_TEXTURE3: case SRC_TEXTURE4: case SRC_TEXTURE5: case SRC_TEXTURE6: case SRC_TEXTURE7: if (!p->state->unit[src - SRC_TEXTURE0].enabled) return GL_FALSE; load_texture(p, src - SRC_TEXTURE0); break; default: break; } return GL_TRUE; } static GLboolean load_texunit_sources( struct texenv_fragment_program *p, int unit ) { struct state_key *key = p->state; int i, nr = key->unit[unit].NumArgsRGB; for (i = 0; i < nr; i++) { if (!load_texenv_source( p, key->unit[unit].OptRGB[i].Source, unit) || !load_texenv_source( p, key->unit[unit].OptA[i].Source, unit )) return GL_FALSE; } return GL_TRUE; } static void create_new_program(struct state_key *key, GLcontext *ctx, struct fragment_program *program) { struct texenv_fragment_program p; GLuint unit; struct ureg cf, out; _mesa_memset(&p, 0, sizeof(p)); p.ctx = ctx; p.state = key; p.program = program; p.program->Instructions = MALLOC(sizeof(struct fp_instruction) * 100); p.program->Base.NumInstructions = 0; p.program->Base.Target = GL_FRAGMENT_PROGRAM_ARB; p.program->NumTexIndirections = 1; /* correct? */ p.program->NumTexInstructions = 0; p.program->NumAluInstructions = 0; p.program->Base.String = 0; p.program->Base.NumInstructions = p.program->Base.NumTemporaries = p.program->Base.NumParameters = p.program->Base.NumAttributes = p.program->Base.NumAddressRegs = 0; p.program->Parameters = _mesa_new_parameter_list(); p.program->InputsRead = 0; p.program->OutputsWritten = 1 << FRAG_OUTPUT_COLR; for (unit = 0; unit < MAX_TEXTURE_UNITS; unit++) p.src_texture[unit] = undef; p.src_previous = undef; p.last_tex_stage = 0; release_temps(&p); if (key->enabled_units) { /* First pass - to support texture_env_crossbar, first identify * all referenced texture sources and emit texld instructions * for each: */ for (unit = 0 ; unit < ctx->Const.MaxTextureUnits ; unit++) if (key->unit[unit].enabled) { if (load_texunit_sources( &p, unit )) p.last_tex_stage = unit; } /* Second pass - emit combine instructions to build final color: */ for (unit = 0 ; unit < ctx->Const.MaxTextureUnits; unit++) if (key->enabled_units & (1<separate_specular) { /* Emit specular add. */ struct ureg s = register_input(&p, FRAG_ATTRIB_COL1); emit_arith( &p, FP_OPCODE_ADD, out, WRITEMASK_XYZ, 0, cf, s, undef ); } else if (memcmp(&cf, &out, sizeof(cf)) != 0) { /* Will wind up in here if no texture enabled or a couple of * other scenarios (GL_REPLACE for instance). */ emit_arith( &p, FP_OPCODE_MOV, out, WRITEMASK_XYZW, 0, cf, undef, undef ); } /* Finish up: */ emit_arith( &p, FP_OPCODE_END, undef, WRITEMASK_XYZW, 0, undef, undef, undef); if (key->fog_enabled) { /* Pull fog mode from GLcontext, the value in the state key is * a reduced value and not what is expected in FogOption */ p.program->FogOption = ctx->Fog.Mode; } else p.program->FogOption = GL_NONE; if (p.program->NumTexIndirections > ctx->Const.MaxFragmentProgramTexIndirections) program_error(&p, "Exceeded max nr indirect texture lookups"); if (p.program->NumTexInstructions > ctx->Const.MaxFragmentProgramTexInstructions) program_error(&p, "Exceeded max TEX instructions"); if (p.program->NumAluInstructions > ctx->Const.MaxFragmentProgramAluInstructions) program_error(&p, "Exceeded max ALU instructions"); /* Notify driver the fragment program has (actually) changed. */ if (ctx->Driver.ProgramStringNotify || DISASSEM) { if (ctx->Driver.ProgramStringNotify) ctx->Driver.ProgramStringNotify( ctx, GL_FRAGMENT_PROGRAM_ARB, &p.program->Base ); if (DISASSEM) { _mesa_debug_fp_inst(p.program->NumTexInstructions + p.program->NumAluInstructions, p.program->Instructions); _mesa_printf("\n"); } } } static void *search_cache( struct texenvprog_cache *cache, GLuint hash, const void *key, GLuint keysize) { struct texenvprog_cache *c; for (c = cache; c; c = c->next) { if (c->hash == hash && memcmp(c->key, key, keysize) == 0) return c->data; } return NULL; } static void cache_item( struct texenvprog_cache **cache, GLuint hash, void *key, void *data ) { struct texenvprog_cache *c = MALLOC(sizeof(*c)); c->hash = hash; c->key = key; c->data = data; c->next = *cache; *cache = c; } static GLuint hash_key( struct state_key *key ) { GLuint *ikey = (GLuint *)key; GLuint hash = 0, i; /* I'm sure this can be improved on, but speed is important: */ for (i = 0; i < sizeof(*key)/sizeof(GLuint); i++) hash ^= ikey[i]; return hash; } void _mesa_UpdateTexEnvProgram( GLcontext *ctx ) { struct state_key *key; GLuint hash; if (ctx->FragmentProgram._Enabled) return; key = make_state_key(ctx); hash = hash_key(key); ctx->FragmentProgram._Current = ctx->_TexEnvProgram = (struct fragment_program *) search_cache(ctx->Texture.env_fp_cache, hash, key, sizeof(*key)); if (!ctx->_TexEnvProgram) { if (0) _mesa_printf("Building new texenv proggy for key %x\n", hash); ctx->FragmentProgram._Current = ctx->_TexEnvProgram = (struct fragment_program *) ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0); create_new_program(key, ctx, ctx->_TexEnvProgram); cache_item(&ctx->Texture.env_fp_cache, hash, key, ctx->_TexEnvProgram); } else { FREE(key); if (0) _mesa_printf("Found existing texenv program for key %x\n", hash); } } void _mesa_TexEnvProgramCacheDestroy( GLcontext *ctx ) { struct texenvprog_cache *a, *tmp; for (a = ctx->Texture.env_fp_cache; a; a = tmp) { tmp = a->next; FREE(a->key); FREE(a->data); FREE(a); } }