diff options
Diffstat (limited to 'src/mesa/main/texenvprogram.c')
| -rw-r--r-- | src/mesa/main/texenvprogram.c | 1281 |
1 files changed, 1281 insertions, 0 deletions
diff --git a/src/mesa/main/texenvprogram.c b/src/mesa/main/texenvprogram.c new file mode 100644 index 0000000000..5329719cbb --- /dev/null +++ b/src/mesa/main/texenvprogram.c @@ -0,0 +1,1281 @@ +/************************************************************************** + * + * 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/program_instruction.h" + +/** + * According to Glean's texCombine test, no more than 21 instructions + * are needed. Allow a few extra just in case. + */ +#define MAX_INSTRUCTIONS 24 + +#define DISASSEM (MESA_VERBOSE & VERBOSE_DISASSEM) + +struct mode_opt { + GLuint Source:4; + GLuint Operand:3; +}; + +struct state_key { + GLbitfield enabled_units; + GLuint separate_specular:1; + GLuint fog_enabled:1; + GLuint fog_mode:2; + + struct { + GLuint enabled:1; + GLuint source_index:3; /* one of TEXTURE_1D/2D/3D/CUBE/RECT_INDEX */ + GLuint ScaleShiftRGB:2; + GLuint ScaleShiftA:2; + + GLuint NumArgsRGB:2; + GLuint ModeRGB:4; + struct mode_opt OptRGB[3]; + + GLuint NumArgsA:2; + GLuint 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( GLbitfield 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; + } +} + +/** + * Examine current texture environment state and generate a unique + * key to identify it. + */ +static void make_state_key( GLcontext *ctx, struct state_key *key ) +{ + GLuint i, j; + + memset(key, 0, sizeof(*key)); + + for (i=0;i<MAX_TEXTURE_UNITS;i++) { + const struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i]; + + if (!texUnit->_ReallyEnabled) + continue; + + key->unit[i].enabled = 1; + key->enabled_units |= (1<<i); + + key->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->ScaleShiftA; + + 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); + } +} + +/* 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; +}; + +static const struct ureg undef = { + PROGRAM_UNDEFINED, + ~0, + 0, + 0, + 0, + 0, + 0 +}; + + +/* State used to build the fragment program: + */ +struct texenv_fragment_program { + struct gl_fragment_program *program; + GLcontext *ctx; + struct state_key *state; + + GLbitfield alu_temps; /* Track texture indirections, see spec. */ + GLbitfield temps_output; /* Track texture indirections, see spec. */ + GLbitfield 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 == PROGRAM_UNDEFINED; +} + + +static struct ureg get_temp( struct texenv_fragment_program *p ) +{ + GLint bit; + + /* First try and reuse temps which have been used already: + */ + bit = _mesa_ffs( ~p->temp_in_use & p->alu_temps ); + + /* Then any unused temporary: + */ + if (!bit) + bit = _mesa_ffs( ~p->temp_in_use ); + + if (!bit) { + _mesa_problem(NULL, "%s: out of temporaries\n", __FILE__); + _mesa_exit(1); + } + + if ((GLuint) bit > p->program->Base.NumTemporaries) + p->program->Base.NumTemporaries = bit; + + 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 = _mesa_ffs( ~p->temp_in_use & ~p->alu_temps & ~p->temps_output ); + + /* Then any unused temporary: + */ + if (!bit) + bit = _mesa_ffs( ~p->temp_in_use ); + + if (!bit) { + _mesa_problem(NULL, "%s: out of temporaries\n", __FILE__); + _mesa_exit(1); + } + + if ((GLuint) bit > p->program->Base.NumTemporaries) + p->program->Base.NumTemporaries = bit; + + 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.FragmentProgram.MaxTemps; + + /* 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<<max_temp)-1) | p->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->Base.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->Base.InputsRead |= (1 << input); + return make_ureg(PROGRAM_INPUT, input); +} + + +static void emit_arg( struct prog_src_register *reg, + struct ureg ureg ) +{ + reg->File = ureg.file; + reg->Index = ureg.idx; + reg->Swizzle = ureg.swz; + reg->NegateBase = ureg.negatebase ? 0xf : 0x0; + reg->Abs = ureg.abs; + reg->NegateAbs = ureg.negateabs; +} + +static void emit_dst( struct prog_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 prog_instruction * +emit_op(struct texenv_fragment_program *p, + enum prog_opcode op, + struct ureg dest, + GLuint mask, + GLboolean saturate, + struct ureg src0, + struct ureg src1, + struct ureg src2 ) +{ + GLuint nr = p->program->Base.NumInstructions++; + struct prog_instruction *inst = &p->program->Base.Instructions[nr]; + + _mesa_init_instructions(inst, 1); + inst->Opcode = op; + + emit_arg( &inst->SrcReg[0], src0 ); + emit_arg( &inst->SrcReg[1], src1 ); + emit_arg( &inst->SrcReg[2], src2 ); + + inst->SaturateMode = saturate ? SATURATE_ZERO_ONE : SATURATE_OFF; + + 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, + enum prog_opcode op, + struct ureg dest, + GLuint mask, + GLboolean 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, + enum prog_opcode op, + struct ureg dest, + GLuint destmask, + GLuint tex_unit, + GLuint tex_idx, + struct ureg coord ) +{ + struct prog_instruction *inst = emit_op( p, op, + dest, destmask, + GL_FALSE, /* don't saturate? */ + coord, /* arg 0? */ + undef, + undef); + + inst->TexSrcTarget = tex_idx; + inst->TexSrcUnit = tex_unit; + + p->program->NumTexInstructions++; + + /* Is this a texture indirection? + */ + if ((coord.file == PROGRAM_TEMPORARY && + (p->temps_output & (1<<coord.idx))) || + (dest.file == PROGRAM_TEMPORARY && + (p->alu_temps & (1<<dest.idx)))) { + p->program->NumTexIndirections++; + p->temps_output = 1<<coord.idx; + p->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->Base.Parameters, values, 4 ); + 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->half = 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->zero = 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, OPCODE_SUB, arg, mask, 0, one, src, undef); + + case OPR_SRC_ALPHA: + if (mask == WRITEMASK_W) + return src; + else + return swizzle1( src, SWIZZLE_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, OPCODE_SUB, arg, mask, 0, + one, swizzle1(src, SWIZZLE_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 ) +{ + GLuint 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, + GLboolean saturate, + GLuint unit, + GLuint nr, + GLuint mode, + const struct mode_opt *opt) +{ + struct ureg src[3]; + struct ureg tmp, half; + GLuint i; + + tmp = undef; /* silence warning (bug 5318) */ + + 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, OPCODE_MOV, dest, mask, saturate, src[0], undef, undef ); + case MODE_MODULATE: + return emit_arith( p, OPCODE_MUL, dest, mask, saturate, + src[0], src[1], undef ); + case MODE_ADD: + return emit_arith( p, OPCODE_ADD, dest, mask, saturate, + src[0], src[1], undef ); + case MODE_ADD_SIGNED: + /* tmp = arg0 + arg1 + * result = tmp - .5 + */ + half = get_half(p); + tmp = get_temp( p ); + emit_arith( p, OPCODE_ADD, tmp, mask, 0, src[0], src[1], undef ); + emit_arith( p, 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, OPCODE_LRP, dest, mask, saturate, src[2], src[0], src[1] ); + + case MODE_SUBTRACT: + return emit_arith( p, 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, OPCODE_MAD, tmp0, WRITEMASK_XYZW, 0, + two, src[0], neg1); + + if (_mesa_memcmp(&src[0], &src[1], sizeof(struct ureg)) == 0) + tmp1 = tmp0; + else + emit_arith( p, OPCODE_MAD, tmp1, WRITEMASK_XYZW, 0, + two, src[1], neg1); + emit_arith( p, OPCODE_DP3, dest, mask, saturate, tmp0, tmp1, undef); + return dest; + } + case MODE_MODULATE_ADD_ATI: + /* Arg0 * Arg2 + Arg1 */ + return emit_arith( p, 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, OPCODE_MAD, tmp0, mask, 0, src[0], src[2], src[1] ); + emit_arith( p, OPCODE_SUB, dest, mask, saturate, tmp0, half, undef ); + return dest; + } + case MODE_MODULATE_SUBTRACT_ATI: + /* Arg0 * Arg2 - Arg1 */ + emit_arith( p, OPCODE_MAD, dest, mask, 0, src[0], src[2], negate(src[1]) ); + return dest; + default: + return src[0]; + } +} + + +/** + * Generate instructions for one texture unit's env/combiner mode. + */ +static struct ureg +emit_texenv(struct texenv_fragment_program *p, GLuint unit) +{ + struct state_key *key = p->state; + GLboolean 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_RESULT_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<<rgb_shift); + } + else { + shift = register_const4f(p, + 1<<rgb_shift, + 1<<rgb_shift, + 1<<rgb_shift, + 1<<alpha_shift); + } + return emit_arith( p, OPCODE_MUL, dest, WRITEMASK_XYZW, + saturate, out, shift, undef ); + } + else + return out; +} + + +/** + * Generate instruction for getting a texture source term. + */ +static void load_texture( struct texenv_fragment_program *p, GLuint unit ) +{ + if (is_undef(p->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. + */ + if (p->state->unit[unit].enabled) + p->src_texture[unit] = emit_texld( p, OPCODE_TXP, + tmp, WRITEMASK_XYZW, + unit, dim, texcoord ); + else + p->src_texture[unit] = get_zero(p); + } +} + +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: + load_texture(p, src - SRC_TEXTURE0); + break; + + default: + break; + } + + return GL_TRUE; +} + + +/** + * Generate instructions for loading all texture source terms. + */ +static GLboolean +load_texunit_sources( struct texenv_fragment_program *p, int unit ) +{ + struct state_key *key = p->state; + GLuint i; + + for (i = 0; i < key->unit[unit].NumArgsRGB; i++) { + load_texenv_source( p, key->unit[unit].OptRGB[i].Source, unit); + } + + for (i = 0; i < key->unit[unit].NumArgsA; i++) { + load_texenv_source( p, key->unit[unit].OptA[i].Source, unit ); + } + + return GL_TRUE; +} + + +/** + * Generate a new fragment program which implements the context's + * current texture env/combine mode. + */ +static void +create_new_program(GLcontext *ctx, struct state_key *key, + struct gl_fragment_program *program) +{ + struct prog_instruction instBuffer[MAX_INSTRUCTIONS]; + 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; + + /* During code generation, use locally-allocated instruction buffer, + * then alloc dynamic storage below. + */ + p.program->Base.Instructions = instBuffer; + 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->Base.Parameters = _mesa_new_parameter_list(); + + p.program->Base.InputsRead = 0; + p.program->Base.OutputsWritten = 1 << FRAG_RESULT_COLR; + + for (unit = 0; unit < MAX_TEXTURE_UNITS; unit++) + p.src_texture[unit] = undef; + + p.src_previous = undef; + p.half = undef; + p.zero = undef; + p.one = 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) { + 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<<unit)) { + p.src_previous = emit_texenv( &p, unit ); + release_temps(&p); /* release all temps */ + } + } + + cf = get_source( &p, SRC_PREVIOUS, 0 ); + out = make_ureg( PROGRAM_OUTPUT, FRAG_RESULT_COLR ); + + if (key->separate_specular) { + /* Emit specular add. + */ + struct ureg s = register_input(&p, FRAG_ATTRIB_COL1); + emit_arith( &p, OPCODE_ADD, out, WRITEMASK_XYZ, 0, cf, s, undef ); + emit_arith( &p, OPCODE_MOV, out, WRITEMASK_W, 0, cf, undef, undef ); + } + else if (_mesa_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, OPCODE_MOV, out, WRITEMASK_XYZW, 0, cf, undef, undef ); + } + + /* Finish up: + */ + emit_arith( &p, 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.FragmentProgram.MaxTexIndirections) + program_error(&p, "Exceeded max nr indirect texture lookups"); + + if (p.program->NumTexInstructions > ctx->Const.FragmentProgram.MaxTexInstructions) + program_error(&p, "Exceeded max TEX instructions"); + + if (p.program->NumAluInstructions > ctx->Const.FragmentProgram.MaxAluInstructions) + program_error(&p, "Exceeded max ALU instructions"); + + ASSERT(p.program->Base.NumInstructions <= MAX_INSTRUCTIONS); + + /* Allocate final instruction array */ + program->Base.Instructions + = _mesa_alloc_instructions(program->Base.NumInstructions); + if (!program->Base.Instructions) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, + "generating tex env program"); + return; + } + _mesa_memcpy(program->Base.Instructions, instBuffer, + sizeof(struct prog_instruction) + * program->Base.NumInstructions); + + /* Notify driver the fragment program has (actually) changed. + */ + if (ctx->Driver.ProgramStringNotify) { + ctx->Driver.ProgramStringNotify( ctx, GL_FRAGMENT_PROGRAM_ARB, + &p.program->Base ); + } + + if (DISASSEM) { + _mesa_print_program(&p.program->Base); + _mesa_printf("\n"); + } +} + + +static struct gl_fragment_program * +search_cache(const struct texenvprog_cache *cache, + GLuint hash, + const void *key, + GLuint keysize) +{ + struct texenvprog_cache_item *c; + + for (c = cache->items[hash % cache->size]; c; c = c->next) { + if (c->hash == hash && memcmp(c->key, key, keysize) == 0) + return (struct gl_fragment_program *) c->data; + } + + return NULL; +} + +static void rehash( struct texenvprog_cache *cache ) +{ + struct texenvprog_cache_item **items; + struct texenvprog_cache_item *c, *next; + GLuint size, i; + + size = cache->size * 3; + items = (struct texenvprog_cache_item**) _mesa_malloc(size * sizeof(*items)); + _mesa_memset(items, 0, size * sizeof(*items)); + + for (i = 0; i < cache->size; i++) + for (c = cache->items[i]; c; c = next) { + next = c->next; + c->next = items[c->hash % size]; + items[c->hash % size] = c; + } + + _mesa_free(cache->items); + cache->items = items; + cache->size = size; +} + +static void clear_cache( struct texenvprog_cache *cache ) +{ + struct texenvprog_cache_item *c, *next; + GLuint i; + + for (i = 0; i < cache->size; i++) { + for (c = cache->items[i]; c; c = next) { + next = c->next; + _mesa_free(c->key); + cache->ctx->Driver.DeleteProgram(cache->ctx, + (struct gl_program *) c->data); + _mesa_free(c); + } + cache->items[i] = NULL; + } + + + cache->n_items = 0; +} + + +static void cache_item( struct texenvprog_cache *cache, + GLuint hash, + const struct state_key *key, + void *data ) +{ + struct texenvprog_cache_item *c = MALLOC(sizeof(*c)); + c->hash = hash; + + c->key = _mesa_malloc(sizeof(*key)); + memcpy(c->key, key, sizeof(*key)); + + c->data = data; + + if (cache->n_items > cache->size * 1.5) { + if (cache->size < 1000) + rehash(cache); + else + clear_cache(cache); + } + + cache->n_items++; + c->next = cache->items[hash % cache->size]; + cache->items[hash % cache->size] = c; +} + +static GLuint hash_key( const struct state_key *key ) +{ + GLuint *ikey = (GLuint *)key; + GLuint hash = 0, i; + + /* Make a slightly better attempt at a hash function: + */ + for (i = 0; i < sizeof(*key)/sizeof(*ikey); i++) + { + hash += ikey[i]; + hash += (hash << 10); + hash ^= (hash >> 6); + } + + return hash; +} + +void _mesa_UpdateTexEnvProgram( GLcontext *ctx ) +{ + struct state_key key; + GLuint hash; + const struct gl_fragment_program *prev = ctx->FragmentProgram._Current; + + if (!ctx->FragmentProgram._Enabled) { + make_state_key(ctx, &key); + hash = hash_key(&key); + + ctx->FragmentProgram._Current = + ctx->_TexEnvProgram = + 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 gl_fragment_program *) + ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0); + + create_new_program(ctx, &key, ctx->_TexEnvProgram); + + cache_item(&ctx->Texture.env_fp_cache, hash, &key, ctx->_TexEnvProgram); + } else { + if (0) _mesa_printf("Found existing texenv program for key %x\n", hash); + } + } + else { + ctx->FragmentProgram._Current = ctx->FragmentProgram.Current; + } + + /* Tell the driver about the change. Could define a new target for + * this? + */ + if (ctx->FragmentProgram._Current != prev && ctx->Driver.BindProgram) { + ctx->Driver.BindProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, + (struct gl_program *) ctx->FragmentProgram._Current); + } +} + + +void _mesa_TexEnvProgramCacheInit( GLcontext *ctx ) +{ + ctx->Texture.env_fp_cache.ctx = ctx; + ctx->Texture.env_fp_cache.size = 17; + ctx->Texture.env_fp_cache.n_items = 0; + ctx->Texture.env_fp_cache.items = (struct texenvprog_cache_item **) + _mesa_calloc(ctx->Texture.env_fp_cache.size * + sizeof(struct texenvprog_cache_item)); +} + + +void _mesa_TexEnvProgramCacheDestroy( GLcontext *ctx ) +{ + clear_cache(&ctx->Texture.env_fp_cache); + _mesa_free(ctx->Texture.env_fp_cache.items); +} |