diff options
Diffstat (limited to 'src/mesa/main/texenvprogram.c')
-rw-r--r-- | src/mesa/main/texenvprogram.c | 165 |
1 files changed, 142 insertions, 23 deletions
diff --git a/src/mesa/main/texenvprogram.c b/src/mesa/main/texenvprogram.c index dcd7f90567..2c7df7b8d9 100644 --- a/src/mesa/main/texenvprogram.c +++ b/src/mesa/main/texenvprogram.c @@ -48,24 +48,24 @@ struct texenvprog_cache_item /** - * This MAX is probably a bit generous, but that's OK. There can be - * up to four instructions per texture unit (TEX + 3 for combine), - * then there's fog and specular add. + * Up to nine instructions per tex unit, plus fog, specular color. */ -#define MAX_INSTRUCTIONS ((MAX_TEXTURE_UNITS * 4) + 12) +#define MAX_INSTRUCTIONS ((MAX_TEXTURE_UNITS * 9) + 12) #define DISASSEM (MESA_VERBOSE & VERBOSE_DISASSEM) struct mode_opt { - GLuint Source:4; - GLuint Operand:3; + GLubyte Source:4; + GLubyte Operand:3; }; struct state_key { - GLbitfield enabled_units; + GLuint nr_enabled_units:8; + GLuint enabled_units:8; GLuint separate_specular:1; GLuint fog_enabled:1; GLuint fog_mode:2; + GLuint inputs_available:12; struct { GLuint enabled:1; @@ -76,10 +76,10 @@ struct state_key { GLuint NumArgsRGB:2; GLuint ModeRGB:4; - struct mode_opt OptRGB[3]; - GLuint NumArgsA:2; GLuint ModeA:4; + + struct mode_opt OptRGB[3]; struct mode_opt OptA[3]; } unit[8]; }; @@ -201,6 +201,76 @@ static GLuint translate_tex_src_bit( GLbitfield bit ) } } +#define VERT_BIT_TEX_ANY (0xff << VERT_ATTRIB_TEX0) +#define VERT_RESULT_TEX_ANY (0xff << VERT_RESULT_TEX0) + +/** + * Identify all possible varying inputs. The fragment program will + * never reference non-varying inputs, but will track them via state + * constants instead. + * + * This function figures out all the inputs that the fragment program + * has access to. The bitmask is later reduced to just those which + * are actually referenced. + */ +static GLbitfield get_fp_input_mask( GLcontext *ctx ) +{ + GLbitfield fp_inputs = 0x0; + + if (ctx->VertexProgram._Overriden) { + /* Somebody's messing with the vertex program and we don't have + * a clue what's happening. Assume that it could be producing + * all possible outputs. + */ + fp_inputs = ~0; + } + else if (ctx->RenderMode == GL_FEEDBACK) { + fp_inputs = (FRAG_BIT_COL0 | FRAG_BIT_TEX0); + } + else if (!ctx->VertexProgram._Enabled || + !ctx->VertexProgram._Current) { + + /* Fixed function logic */ + GLbitfield varying_inputs = ctx->varying_vp_inputs; + + /* First look at what values may be computed by the generated + * vertex program: + */ + if (ctx->Light.Enabled) { + fp_inputs |= FRAG_BIT_COL0; + + if (ctx->_TriangleCaps & DD_SEPARATE_SPECULAR) + fp_inputs |= FRAG_BIT_COL1; + } + + fp_inputs |= (ctx->Texture._TexGenEnabled | + ctx->Texture._TexMatEnabled) << FRAG_ATTRIB_TEX0; + + /* Then look at what might be varying as a result of enabled + * arrays, etc: + */ + if (varying_inputs & VERT_BIT_COLOR0) fp_inputs |= FRAG_BIT_COL0; + if (varying_inputs & VERT_BIT_COLOR1) fp_inputs |= FRAG_BIT_COL1; + + fp_inputs |= (((varying_inputs & VERT_BIT_TEX_ANY) >> VERT_ATTRIB_TEX0) + << FRAG_ATTRIB_TEX0); + + } + else { + /* calculate from vp->outputs */ + GLbitfield vp_outputs = ctx->VertexProgram._Current->Base.OutputsWritten; + + if (vp_outputs & (1 << VERT_RESULT_COL0)) fp_inputs |= FRAG_BIT_COL0; + if (vp_outputs & (1 << VERT_RESULT_COL1)) fp_inputs |= FRAG_BIT_COL1; + + fp_inputs |= (((vp_outputs & VERT_RESULT_TEX_ANY) >> VERT_RESULT_TEX0) + << FRAG_ATTRIB_TEX0); + } + + return fp_inputs; +} + + /** * Examine current texture environment state and generate a unique * key to identify it. @@ -208,7 +278,9 @@ static GLuint translate_tex_src_bit( GLbitfield bit ) static void make_state_key( GLcontext *ctx, struct state_key *key ) { GLuint i, j; - + GLbitfield inputs_referenced = FRAG_BIT_COL0; + GLbitfield inputs_available = get_fp_input_mask( ctx ); + memset(key, 0, sizeof(*key)); for (i=0;i<MAX_TEXTURE_UNITS;i++) { @@ -219,6 +291,8 @@ static void make_state_key( GLcontext *ctx, struct state_key *key ) key->unit[i].enabled = 1; key->enabled_units |= (1<<i); + key->nr_enabled_units = i+1; + inputs_referenced |= FRAG_BIT_TEX(i); key->unit[i].source_index = translate_tex_src_bit(texUnit->_ReallyEnabled); @@ -247,16 +321,22 @@ static void make_state_key( GLcontext *ctx, struct state_key *key ) } } - if (ctx->_TriangleCaps & DD_SEPARATE_SPECULAR) + if (ctx->_TriangleCaps & DD_SEPARATE_SPECULAR) { key->separate_specular = 1; + inputs_referenced |= FRAG_BIT_COL1; + } if (ctx->Fog.Enabled) { key->fog_enabled = 1; key->fog_mode = translate_fog_mode(ctx->Fog.Mode); + inputs_referenced |= FRAG_BIT_FOGC; /* maybe */ } + + key->inputs_available = (inputs_available & inputs_referenced); } -/* Use uregs to represent registers internally, translate to Mesa's +/** + * 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 @@ -289,16 +369,16 @@ static const struct ureg undef = { }; -/* State used to build the fragment program: +/** 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. */ + 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]; @@ -306,11 +386,11 @@ struct texenv_fragment_program { * else undef. */ - struct ureg src_previous; /* Reg containing color from previous + 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 */ + GLuint last_tex_stage; /**< Number of last enabled texture unit */ struct ureg half; struct ureg one; @@ -388,7 +468,7 @@ static struct ureg get_tex_temp( struct texenv_fragment_program *p ) { int bit; - /* First try to find availble temp not previously used (to avoid + /* First try to find available 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: @@ -413,6 +493,14 @@ static struct ureg get_tex_temp( struct texenv_fragment_program *p ) } +/** Mark a temp reg as being no longer allocatable. */ +static void reserve_temp( struct texenv_fragment_program *p, struct ureg r ) +{ + if (r.file == PROGRAM_TEMPORARY) + p->temps_output |= (1 << r.idx); +} + + static void release_temps(GLcontext *ctx, struct texenv_fragment_program *p ) { GLuint max_temp = ctx->Const.FragmentProgram.MaxTemps; @@ -451,11 +539,29 @@ static struct ureg register_param5( struct texenv_fragment_program *p, #define register_param3(p,s0,s1,s2) register_param5(p,s0,s1,s2,0,0) #define register_param4(p,s0,s1,s2,s3) register_param5(p,s0,s1,s2,s3,0) +static GLuint frag_to_vert_attrib( GLuint attrib ) +{ + switch (attrib) { + case FRAG_ATTRIB_COL0: return VERT_ATTRIB_COLOR0; + case FRAG_ATTRIB_COL1: return VERT_ATTRIB_COLOR1; + default: + assert(attrib >= FRAG_ATTRIB_TEX0); + assert(attrib <= FRAG_ATTRIB_TEX7); + return attrib - FRAG_ATTRIB_TEX0 + VERT_ATTRIB_TEX0; + } +} + static struct ureg register_input( struct texenv_fragment_program *p, GLuint input ) { - p->program->Base.InputsRead |= (1 << input); - return make_ureg(PROGRAM_INPUT, input); + if (p->state->inputs_available & (1<<input)) { + p->program->Base.InputsRead |= (1 << input); + return make_ureg(PROGRAM_INPUT, input); + } + else { + GLuint idx = frag_to_vert_attrib( input ); + return register_param3( p, STATE_INTERNAL, STATE_CURRENT_ATTRIB, idx ); + } } @@ -506,10 +612,12 @@ emit_op(struct texenv_fragment_program *p, emit_dst( &inst->DstReg, dest, mask ); +#if 0 /* Accounting for indirection tracking: */ if (dest.file == PROGRAM_TEMPORARY) p->temps_output |= 1 << dest.idx; +#endif return inst; } @@ -564,6 +672,10 @@ static struct ureg emit_texld( struct texenv_fragment_program *p, p->program->Base.NumTexInstructions++; + /* Accounting for indirection tracking: + */ + reserve_temp(p, dest); + /* Is this a texture indirection? */ if ((coord.file == PROGRAM_TEMPORARY && @@ -588,14 +700,16 @@ static struct ureg register_const4f( struct texenv_fragment_program *p, { GLfloat values[4]; GLuint idx, swizzle; + struct ureg r; values[0] = s0; values[1] = s1; values[2] = s2; values[3] = s3; idx = _mesa_add_unnamed_constant( p->program->Base.Parameters, values, 4, &swizzle ); - ASSERT(swizzle == SWIZZLE_NOOP); - return make_ureg(PROGRAM_CONSTANT, idx); + r = make_ureg(PROGRAM_CONSTANT, idx); + r.swz = swizzle; + return r; } #define register_scalar_const(p, s0) register_const4f(p, s0, s0, s0, s0) @@ -953,6 +1067,7 @@ static void load_texture( struct texenv_fragment_program *p, GLuint unit ) p->src_texture[unit] = emit_texld( p, OPCODE_TXP, tmp, WRITEMASK_XYZW, unit, dim, texcoord ); + if (p->state->unit[unit].shadow) p->program->Base.ShadowSamplers |= 1 << unit; @@ -1078,6 +1193,7 @@ create_new_program(GLcontext *ctx, struct state_key *key, for (unit = 0 ; unit < ctx->Const.MaxTextureUnits; unit++) if (key->enabled_units & (1<<unit)) { p.src_previous = emit_texenv( &p, unit ); + reserve_temp(&p, p.src_previous); /* don't re-use this temp reg */ release_temps(ctx, &p); /* release all temps */ } } @@ -1189,6 +1305,9 @@ _mesa_get_fixed_func_fragment_program(GLcontext *ctx) * If _MaintainTexEnvProgram is set we'll generate a fragment program that * implements the current texture env/combine mode. * This function generates that program and puts it into effect. + * + * XXX: remove this function. currently only called by some drivers, + * not by mesa core. We now handle this properly from inside mesa. */ void _mesa_UpdateTexEnvProgram( GLcontext *ctx ) |