1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
31 #include "shader/prog_parameter.h"
32 #include "shader/prog_cache.h"
33 #include "shader/prog_instruction.h"
34 #include "shader/prog_print.h"
35 #include "shader/prog_statevars.h"
36 #include "shader/programopt.h"
37 #include "texenvprogram.h"
40 * Up to nine instructions per tex unit, plus fog, specular color.
42 #define MAX_INSTRUCTIONS ((MAX_TEXTURE_UNITS * 9) + 12)
44 #define DISASSEM (MESA_VERBOSE & VERBOSE_DISASSEM)
52 GLuint nr_enabled_units
:8;
53 GLuint enabled_units
:8;
54 GLuint separate_specular
:1;
57 GLuint inputs_available
:12;
61 GLuint source_index
:3; /* one of TEXTURE_1D/2D/3D/CUBE/RECT_INDEX */
62 GLuint ScaleShiftRGB
:2;
70 struct mode_opt OptRGB
[3];
71 struct mode_opt OptA
[3];
80 static GLuint
translate_fog_mode( GLenum mode
)
83 case GL_LINEAR
: return FOG_LINEAR
;
84 case GL_EXP
: return FOG_EXP
;
85 case GL_EXP2
: return FOG_EXP2
;
86 default: return FOG_UNKNOWN
;
90 #define OPR_SRC_COLOR 0
91 #define OPR_ONE_MINUS_SRC_COLOR 1
92 #define OPR_SRC_ALPHA 2
93 #define OPR_ONE_MINUS_SRC_ALPHA 3
98 static GLuint
translate_operand( GLenum operand
)
101 case GL_SRC_COLOR
: return OPR_SRC_COLOR
;
102 case GL_ONE_MINUS_SRC_COLOR
: return OPR_ONE_MINUS_SRC_COLOR
;
103 case GL_SRC_ALPHA
: return OPR_SRC_ALPHA
;
104 case GL_ONE_MINUS_SRC_ALPHA
: return OPR_ONE_MINUS_SRC_ALPHA
;
105 case GL_ZERO
: return OPR_ZERO
;
106 case GL_ONE
: return OPR_ONE
;
107 default: return OPR_UNKNOWN
;
111 #define SRC_TEXTURE 0
112 #define SRC_TEXTURE0 1
113 #define SRC_TEXTURE1 2
114 #define SRC_TEXTURE2 3
115 #define SRC_TEXTURE3 4
116 #define SRC_TEXTURE4 5
117 #define SRC_TEXTURE5 6
118 #define SRC_TEXTURE6 7
119 #define SRC_TEXTURE7 8
120 #define SRC_CONSTANT 9
121 #define SRC_PRIMARY_COLOR 10
122 #define SRC_PREVIOUS 11
123 #define SRC_UNKNOWN 15
125 static GLuint
translate_source( GLenum src
)
128 case GL_TEXTURE
: return SRC_TEXTURE
;
136 case GL_TEXTURE7
: return SRC_TEXTURE0
+ (src
- GL_TEXTURE0
);
137 case GL_CONSTANT
: return SRC_CONSTANT
;
138 case GL_PRIMARY_COLOR
: return SRC_PRIMARY_COLOR
;
139 case GL_PREVIOUS
: return SRC_PREVIOUS
;
140 default: return SRC_UNKNOWN
;
144 #define MODE_REPLACE 0
145 #define MODE_MODULATE 1
147 #define MODE_ADD_SIGNED 3
148 #define MODE_INTERPOLATE 4
149 #define MODE_SUBTRACT 5
150 #define MODE_DOT3_RGB 6
151 #define MODE_DOT3_RGB_EXT 7
152 #define MODE_DOT3_RGBA 8
153 #define MODE_DOT3_RGBA_EXT 9
154 #define MODE_MODULATE_ADD_ATI 10
155 #define MODE_MODULATE_SIGNED_ADD_ATI 11
156 #define MODE_MODULATE_SUBTRACT_ATI 12
157 #define MODE_UNKNOWN 15
159 static GLuint
translate_mode( GLenum mode
)
162 case GL_REPLACE
: return MODE_REPLACE
;
163 case GL_MODULATE
: return MODE_MODULATE
;
164 case GL_ADD
: return MODE_ADD
;
165 case GL_ADD_SIGNED
: return MODE_ADD_SIGNED
;
166 case GL_INTERPOLATE
: return MODE_INTERPOLATE
;
167 case GL_SUBTRACT
: return MODE_SUBTRACT
;
168 case GL_DOT3_RGB
: return MODE_DOT3_RGB
;
169 case GL_DOT3_RGB_EXT
: return MODE_DOT3_RGB_EXT
;
170 case GL_DOT3_RGBA
: return MODE_DOT3_RGBA
;
171 case GL_DOT3_RGBA_EXT
: return MODE_DOT3_RGBA_EXT
;
172 case GL_MODULATE_ADD_ATI
: return MODE_MODULATE_ADD_ATI
;
173 case GL_MODULATE_SIGNED_ADD_ATI
: return MODE_MODULATE_SIGNED_ADD_ATI
;
174 case GL_MODULATE_SUBTRACT_ATI
: return MODE_MODULATE_SUBTRACT_ATI
;
175 default: return MODE_UNKNOWN
;
179 #define TEXTURE_UNKNOWN_INDEX 7
180 static GLuint
translate_tex_src_bit( GLbitfield bit
)
183 case TEXTURE_1D_BIT
: return TEXTURE_1D_INDEX
;
184 case TEXTURE_2D_BIT
: return TEXTURE_2D_INDEX
;
185 case TEXTURE_RECT_BIT
: return TEXTURE_RECT_INDEX
;
186 case TEXTURE_3D_BIT
: return TEXTURE_3D_INDEX
;
187 case TEXTURE_CUBE_BIT
: return TEXTURE_CUBE_INDEX
;
188 default: return TEXTURE_UNKNOWN_INDEX
;
192 #define VERT_BIT_TEX_ANY (0xff << VERT_ATTRIB_TEX0)
193 #define VERT_RESULT_TEX_ANY (0xff << VERT_RESULT_TEX0)
195 /* Identify all possible varying inputs. The fragment program will
196 * never reference non-varying inputs, but will track them via state
199 * This function figures out all the inputs that the fragment program
200 * has access to. The bitmask is later reduced to just those which
201 * are actually referenced.
203 static GLuint
get_fp_input_mask( GLcontext
*ctx
)
205 GLuint fp_inputs
= 0;
208 GLuint varying_inputs
= ctx
->varying_vp_inputs
;
210 /* First look at what values may be computed by the generated
213 if (ctx
->Light
.Enabled
) {
214 fp_inputs
|= FRAG_BIT_COL0
;
216 if (ctx
->_TriangleCaps
& DD_SEPARATE_SPECULAR
)
217 fp_inputs
|= FRAG_BIT_COL1
;
220 fp_inputs
|= (ctx
->Texture
._TexGenEnabled
|
221 ctx
->Texture
._TexMatEnabled
) << FRAG_ATTRIB_TEX0
;
223 /* Then look at what might be varying as a result of enabled
226 if (varying_inputs
& VERT_BIT_COLOR0
) fp_inputs
|= FRAG_BIT_COL0
;
227 if (varying_inputs
& VERT_BIT_COLOR1
) fp_inputs
|= FRAG_BIT_COL1
;
229 fp_inputs
|= (((varying_inputs
& VERT_BIT_TEX_ANY
) >> VERT_ATTRIB_TEX0
)
230 << FRAG_ATTRIB_TEX0
);
234 /* calculate from vp->outputs */
235 GLuint vp_outputs
= 0;
237 if (vp_outputs
& (1 << VERT_RESULT_COL0
)) fp_inputs
|= FRAG_BIT_COL0
;
238 if (vp_outputs
& (1 << VERT_RESULT_COL1
)) fp_inputs
|= FRAG_BIT_COL1
;
240 fp_inputs
|= (((vp_outputs
& VERT_RESULT_TEX_ANY
)
242 >> FRAG_ATTRIB_TEX0
);
250 * Examine current texture environment state and generate a unique
251 * key to identify it.
253 static void make_state_key( GLcontext
*ctx
, struct state_key
*key
)
256 GLuint inputs_referenced
= FRAG_BIT_COL0
;
257 GLuint inputs_available
= get_fp_input_mask( ctx
);
259 memset(key
, 0, sizeof(*key
));
261 for (i
=0;i
<MAX_TEXTURE_UNITS
;i
++) {
262 const struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[i
];
264 if (!texUnit
->_ReallyEnabled
)
267 key
->unit
[i
].enabled
= 1;
268 key
->enabled_units
|= (1<<i
);
269 key
->nr_enabled_units
= i
+1;
270 inputs_referenced
|= FRAG_BIT_TEX(i
);
272 key
->unit
[i
].source_index
=
273 translate_tex_src_bit(texUnit
->_ReallyEnabled
);
275 key
->unit
[i
].NumArgsRGB
= texUnit
->_CurrentCombine
->_NumArgsRGB
;
276 key
->unit
[i
].NumArgsA
= texUnit
->_CurrentCombine
->_NumArgsA
;
278 key
->unit
[i
].ModeRGB
=
279 translate_mode(texUnit
->_CurrentCombine
->ModeRGB
);
281 translate_mode(texUnit
->_CurrentCombine
->ModeA
);
283 key
->unit
[i
].ScaleShiftRGB
= texUnit
->_CurrentCombine
->ScaleShiftRGB
;
284 key
->unit
[i
].ScaleShiftA
= texUnit
->_CurrentCombine
->ScaleShiftA
;
287 key
->unit
[i
].OptRGB
[j
].Operand
=
288 translate_operand(texUnit
->_CurrentCombine
->OperandRGB
[j
]);
289 key
->unit
[i
].OptA
[j
].Operand
=
290 translate_operand(texUnit
->_CurrentCombine
->OperandA
[j
]);
291 key
->unit
[i
].OptRGB
[j
].Source
=
292 translate_source(texUnit
->_CurrentCombine
->SourceRGB
[j
]);
293 key
->unit
[i
].OptA
[j
].Source
=
294 translate_source(texUnit
->_CurrentCombine
->SourceA
[j
]);
298 if (ctx
->_TriangleCaps
& DD_SEPARATE_SPECULAR
) {
299 key
->separate_specular
= 1;
300 inputs_referenced
|= FRAG_BIT_COL1
;
303 if (ctx
->Fog
.Enabled
) {
304 key
->fog_enabled
= 1;
305 key
->fog_mode
= translate_fog_mode(ctx
->Fog
.Mode
);
306 inputs_referenced
|= FRAG_BIT_FOGC
; /* maybe */
309 key
->inputs_available
= (inputs_available
& inputs_referenced
);
312 /* Use uregs to represent registers internally, translate to Mesa's
313 * expected formats on emit.
315 * NOTE: These are passed by value extensively in this file rather
316 * than as usual by pointer reference. If this disturbs you, try
317 * remembering they are just 32bits in size.
319 * GCC is smart enough to deal with these dword-sized structures in
320 * much the same way as if I had defined them as dwords and was using
321 * macros to access and set the fields. This is much nicer and easier
334 static const struct ureg undef
= {
345 /* State used to build the fragment program:
347 struct texenv_fragment_program
{
348 struct gl_fragment_program
*program
;
350 struct state_key
*state
;
352 GLbitfield alu_temps
; /* Track texture indirections, see spec. */
353 GLbitfield temps_output
; /* Track texture indirections, see spec. */
354 GLbitfield temp_in_use
; /* Tracks temporary regs which are in use. */
357 struct ureg src_texture
[MAX_TEXTURE_UNITS
];
358 /* Reg containing each texture unit's sampled texture color,
362 struct ureg src_previous
; /* Reg containing color from previous
363 * stage. May need to be decl'd.
366 GLuint last_tex_stage
; /* Number of last enabled texture unit */
375 static struct ureg
make_ureg(GLuint file
, GLuint idx
)
383 reg
.swz
= SWIZZLE_NOOP
;
388 static struct ureg
swizzle( struct ureg reg
, int x
, int y
, int z
, int w
)
390 reg
.swz
= MAKE_SWIZZLE4(GET_SWZ(reg
.swz
, x
),
393 GET_SWZ(reg
.swz
, w
));
398 static struct ureg
swizzle1( struct ureg reg
, int x
)
400 return swizzle(reg
, x
, x
, x
, x
);
403 static struct ureg
negate( struct ureg reg
)
409 static GLboolean
is_undef( struct ureg reg
)
411 return reg
.file
== PROGRAM_UNDEFINED
;
415 static struct ureg
get_temp( struct texenv_fragment_program
*p
)
419 /* First try and reuse temps which have been used already:
421 bit
= _mesa_ffs( ~p
->temp_in_use
& p
->alu_temps
);
423 /* Then any unused temporary:
426 bit
= _mesa_ffs( ~p
->temp_in_use
);
429 _mesa_problem(NULL
, "%s: out of temporaries\n", __FILE__
);
433 if ((GLuint
) bit
> p
->program
->Base
.NumTemporaries
)
434 p
->program
->Base
.NumTemporaries
= bit
;
436 p
->temp_in_use
|= 1<<(bit
-1);
437 return make_ureg(PROGRAM_TEMPORARY
, (bit
-1));
440 static struct ureg
get_tex_temp( struct texenv_fragment_program
*p
)
444 /* First try to find available temp not previously used (to avoid
445 * starting a new texture indirection). According to the spec, the
446 * ~p->temps_output isn't necessary, but will keep it there for
449 bit
= _mesa_ffs( ~p
->temp_in_use
& ~p
->alu_temps
& ~p
->temps_output
);
451 /* Then any unused temporary:
454 bit
= _mesa_ffs( ~p
->temp_in_use
);
457 _mesa_problem(NULL
, "%s: out of temporaries\n", __FILE__
);
461 if ((GLuint
) bit
> p
->program
->Base
.NumTemporaries
)
462 p
->program
->Base
.NumTemporaries
= bit
;
464 p
->temp_in_use
|= 1<<(bit
-1);
465 return make_ureg(PROGRAM_TEMPORARY
, (bit
-1));
469 /** Mark a temp reg as being no longer allocatable. */
470 static void reserve_temp( struct texenv_fragment_program
*p
, struct ureg r
)
472 if (r
.file
== PROGRAM_TEMPORARY
)
473 p
->temps_output
|= (1 << r
.idx
);
477 static void release_temps(GLcontext
*ctx
, struct texenv_fragment_program
*p
)
479 GLuint max_temp
= ctx
->Const
.FragmentProgram
.MaxTemps
;
481 /* KW: To support tex_env_crossbar, don't release the registers in
484 if (max_temp
>= sizeof(int) * 8)
485 p
->temp_in_use
= p
->temps_output
;
487 p
->temp_in_use
= ~((1<<max_temp
)-1) | p
->temps_output
;
491 static struct ureg
register_param5( struct texenv_fragment_program
*p
,
498 gl_state_index tokens
[STATE_LENGTH
];
505 idx
= _mesa_add_state_reference( p
->program
->Base
.Parameters
, tokens
);
506 return make_ureg(PROGRAM_STATE_VAR
, idx
);
510 #define register_param1(p,s0) register_param5(p,s0,0,0,0,0)
511 #define register_param2(p,s0,s1) register_param5(p,s0,s1,0,0,0)
512 #define register_param3(p,s0,s1,s2) register_param5(p,s0,s1,s2,0,0)
513 #define register_param4(p,s0,s1,s2,s3) register_param5(p,s0,s1,s2,s3,0)
515 static GLuint
frag_to_vert_attrib( GLuint attrib
)
518 case FRAG_ATTRIB_COL0
: return VERT_ATTRIB_COLOR0
;
519 case FRAG_ATTRIB_COL1
: return VERT_ATTRIB_COLOR1
;
521 assert(attrib
>= FRAG_ATTRIB_TEX0
);
522 assert(attrib
<= FRAG_ATTRIB_TEX7
);
523 return attrib
- FRAG_ATTRIB_TEX0
+ VERT_ATTRIB_TEX0
;
528 static struct ureg
register_input( struct texenv_fragment_program
*p
, GLuint input
)
530 if (p
->state
->inputs_available
& (1<<input
)) {
531 p
->program
->Base
.InputsRead
|= (1 << input
);
532 return make_ureg(PROGRAM_INPUT
, input
);
535 GLuint idx
= frag_to_vert_attrib( input
);
536 return register_param3( p
, STATE_INTERNAL
, STATE_CURRENT_ATTRIB
, idx
);
541 static void emit_arg( struct prog_src_register
*reg
,
544 reg
->File
= ureg
.file
;
545 reg
->Index
= ureg
.idx
;
546 reg
->Swizzle
= ureg
.swz
;
547 reg
->NegateBase
= ureg
.negatebase
? 0xf : 0x0;
549 reg
->NegateAbs
= ureg
.negateabs
;
552 static void emit_dst( struct prog_dst_register
*dst
,
553 struct ureg ureg
, GLuint mask
)
555 dst
->File
= ureg
.file
;
556 dst
->Index
= ureg
.idx
;
557 dst
->WriteMask
= mask
;
558 dst
->CondMask
= COND_TR
; /* always pass cond test */
559 dst
->CondSwizzle
= SWIZZLE_NOOP
;
562 static struct prog_instruction
*
563 emit_op(struct texenv_fragment_program
*p
,
572 GLuint nr
= p
->program
->Base
.NumInstructions
++;
573 struct prog_instruction
*inst
= &p
->program
->Base
.Instructions
[nr
];
575 assert(nr
< MAX_INSTRUCTIONS
);
577 _mesa_init_instructions(inst
, 1);
580 emit_arg( &inst
->SrcReg
[0], src0
);
581 emit_arg( &inst
->SrcReg
[1], src1
);
582 emit_arg( &inst
->SrcReg
[2], src2
);
584 inst
->SaturateMode
= saturate
? SATURATE_ZERO_ONE
: SATURATE_OFF
;
586 emit_dst( &inst
->DstReg
, dest
, mask
);
589 /* Accounting for indirection tracking:
591 if (dest
.file
== PROGRAM_TEMPORARY
)
592 p
->temps_output
|= 1 << dest
.idx
;
599 static struct ureg
emit_arith( struct texenv_fragment_program
*p
,
608 emit_op(p
, op
, dest
, mask
, saturate
, src0
, src1
, src2
);
610 /* Accounting for indirection tracking:
612 if (src0
.file
== PROGRAM_TEMPORARY
)
613 p
->alu_temps
|= 1 << src0
.idx
;
615 if (!is_undef(src1
) && src1
.file
== PROGRAM_TEMPORARY
)
616 p
->alu_temps
|= 1 << src1
.idx
;
618 if (!is_undef(src2
) && src2
.file
== PROGRAM_TEMPORARY
)
619 p
->alu_temps
|= 1 << src2
.idx
;
621 if (dest
.file
== PROGRAM_TEMPORARY
)
622 p
->alu_temps
|= 1 << dest
.idx
;
624 p
->program
->Base
.NumAluInstructions
++;
628 static struct ureg
emit_texld( struct texenv_fragment_program
*p
,
636 struct prog_instruction
*inst
= emit_op( p
, op
,
638 GL_FALSE
, /* don't saturate? */
643 inst
->TexSrcTarget
= tex_idx
;
644 inst
->TexSrcUnit
= tex_unit
;
646 p
->program
->Base
.NumTexInstructions
++;
648 /* Accounting for indirection tracking:
650 reserve_temp(p
, dest
);
652 /* Is this a texture indirection?
654 if ((coord
.file
== PROGRAM_TEMPORARY
&&
655 (p
->temps_output
& (1<<coord
.idx
))) ||
656 (dest
.file
== PROGRAM_TEMPORARY
&&
657 (p
->alu_temps
& (1<<dest
.idx
)))) {
658 p
->program
->Base
.NumTexIndirections
++;
659 p
->temps_output
= 1<<coord
.idx
;
661 assert(0); /* KW: texture env crossbar */
668 static struct ureg
register_const4f( struct texenv_fragment_program
*p
,
681 idx
= _mesa_add_unnamed_constant( p
->program
->Base
.Parameters
, values
, 4,
683 r
= make_ureg(PROGRAM_CONSTANT
, idx
);
688 #define register_scalar_const(p, s0) register_const4f(p, s0, s0, s0, s0)
689 #define register_const1f(p, s0) register_const4f(p, s0, 0, 0, 1)
690 #define register_const2f(p, s0, s1) register_const4f(p, s0, s1, 0, 1)
691 #define register_const3f(p, s0, s1, s2) register_const4f(p, s0, s1, s2, 1)
694 static struct ureg
get_one( struct texenv_fragment_program
*p
)
696 if (is_undef(p
->one
))
697 p
->one
= register_scalar_const(p
, 1.0);
701 static struct ureg
get_half( struct texenv_fragment_program
*p
)
703 if (is_undef(p
->half
))
704 p
->half
= register_scalar_const(p
, 0.5);
708 static struct ureg
get_zero( struct texenv_fragment_program
*p
)
710 if (is_undef(p
->zero
))
711 p
->zero
= register_scalar_const(p
, 0.0);
716 static void program_error( struct texenv_fragment_program
*p
, const char *msg
)
718 _mesa_problem(NULL
, msg
);
722 static struct ureg
get_source( struct texenv_fragment_program
*p
,
723 GLuint src
, GLuint unit
)
727 assert(!is_undef(p
->src_texture
[unit
]));
728 return p
->src_texture
[unit
];
738 assert(!is_undef(p
->src_texture
[src
- SRC_TEXTURE0
]));
739 return p
->src_texture
[src
- SRC_TEXTURE0
];
742 return register_param2(p
, STATE_TEXENV_COLOR
, unit
);
744 case SRC_PRIMARY_COLOR
:
745 return register_input(p
, FRAG_ATTRIB_COL0
);
749 if (is_undef(p
->src_previous
))
750 return register_input(p
, FRAG_ATTRIB_COL0
);
752 return p
->src_previous
;
756 static struct ureg
emit_combine_source( struct texenv_fragment_program
*p
,
762 struct ureg arg
, src
, one
;
764 src
= get_source(p
, source
, unit
);
767 case OPR_ONE_MINUS_SRC_COLOR
:
769 * Emit tmp = 1.0 - arg.xyzw
773 return emit_arith( p
, OPCODE_SUB
, arg
, mask
, 0, one
, src
, undef
);
776 if (mask
== WRITEMASK_W
)
779 return swizzle1( src
, SWIZZLE_W
);
780 case OPR_ONE_MINUS_SRC_ALPHA
:
782 * Emit tmp = 1.0 - arg.wwww
786 return emit_arith(p
, OPCODE_SUB
, arg
, mask
, 0,
787 one
, swizzle1(src
, SWIZZLE_W
), undef
);
798 static GLboolean
args_match( struct state_key
*key
, GLuint unit
)
800 GLuint i
, nr
= key
->unit
[unit
].NumArgsRGB
;
802 for (i
= 0 ; i
< nr
; i
++) {
803 if (key
->unit
[unit
].OptA
[i
].Source
!= key
->unit
[unit
].OptRGB
[i
].Source
)
806 switch(key
->unit
[unit
].OptA
[i
].Operand
) {
808 switch(key
->unit
[unit
].OptRGB
[i
].Operand
) {
816 case OPR_ONE_MINUS_SRC_ALPHA
:
817 switch(key
->unit
[unit
].OptRGB
[i
].Operand
) {
818 case OPR_ONE_MINUS_SRC_COLOR
:
819 case OPR_ONE_MINUS_SRC_ALPHA
:
826 return GL_FALSE
; /* impossible */
833 static struct ureg
emit_combine( struct texenv_fragment_program
*p
,
840 const struct mode_opt
*opt
)
843 struct ureg tmp
, half
;
846 tmp
= undef
; /* silence warning (bug 5318) */
848 for (i
= 0; i
< nr
; i
++)
849 src
[i
] = emit_combine_source( p
, mask
, unit
, opt
[i
].Source
, opt
[i
].Operand
);
853 if (mask
== WRITEMASK_XYZW
&& !saturate
)
856 return emit_arith( p
, OPCODE_MOV
, dest
, mask
, saturate
, src
[0], undef
, undef
);
858 return emit_arith( p
, OPCODE_MUL
, dest
, mask
, saturate
,
859 src
[0], src
[1], undef
);
861 return emit_arith( p
, OPCODE_ADD
, dest
, mask
, saturate
,
862 src
[0], src
[1], undef
);
863 case MODE_ADD_SIGNED
:
869 emit_arith( p
, OPCODE_ADD
, tmp
, mask
, 0, src
[0], src
[1], undef
);
870 emit_arith( p
, OPCODE_SUB
, dest
, mask
, saturate
, tmp
, half
, undef
);
872 case MODE_INTERPOLATE
:
873 /* Arg0 * (Arg2) + Arg1 * (1-Arg2) -- note arguments are reordered:
875 return emit_arith( p
, OPCODE_LRP
, dest
, mask
, saturate
, src
[2], src
[0], src
[1] );
878 return emit_arith( p
, OPCODE_SUB
, dest
, mask
, saturate
, src
[0], src
[1], undef
);
881 case MODE_DOT3_RGBA_EXT
:
882 case MODE_DOT3_RGB_EXT
:
883 case MODE_DOT3_RGB
: {
884 struct ureg tmp0
= get_temp( p
);
885 struct ureg tmp1
= get_temp( p
);
886 struct ureg neg1
= register_scalar_const(p
, -1);
887 struct ureg two
= register_scalar_const(p
, 2);
892 * dst = tmp0 dot3 tmp1
894 emit_arith( p
, OPCODE_MAD
, tmp0
, WRITEMASK_XYZW
, 0,
897 if (_mesa_memcmp(&src
[0], &src
[1], sizeof(struct ureg
)) == 0)
900 emit_arith( p
, OPCODE_MAD
, tmp1
, WRITEMASK_XYZW
, 0,
902 emit_arith( p
, OPCODE_DP3
, dest
, mask
, saturate
, tmp0
, tmp1
, undef
);
905 case MODE_MODULATE_ADD_ATI
:
906 /* Arg0 * Arg2 + Arg1 */
907 return emit_arith( p
, OPCODE_MAD
, dest
, mask
, saturate
,
908 src
[0], src
[2], src
[1] );
909 case MODE_MODULATE_SIGNED_ADD_ATI
: {
910 /* Arg0 * Arg2 + Arg1 - 0.5 */
911 struct ureg tmp0
= get_temp(p
);
913 emit_arith( p
, OPCODE_MAD
, tmp0
, mask
, 0, src
[0], src
[2], src
[1] );
914 emit_arith( p
, OPCODE_SUB
, dest
, mask
, saturate
, tmp0
, half
, undef
);
917 case MODE_MODULATE_SUBTRACT_ATI
:
918 /* Arg0 * Arg2 - Arg1 */
919 emit_arith( p
, OPCODE_MAD
, dest
, mask
, 0, src
[0], src
[2], negate(src
[1]) );
928 * Generate instructions for one texture unit's env/combiner mode.
931 emit_texenv(struct texenv_fragment_program
*p
, GLuint unit
)
933 struct state_key
*key
= p
->state
;
934 GLboolean saturate
= (unit
< p
->last_tex_stage
);
935 GLuint rgb_shift
, alpha_shift
;
936 struct ureg out
, shift
;
939 if (!key
->unit
[unit
].enabled
) {
940 return get_source(p
, SRC_PREVIOUS
, 0);
943 switch (key
->unit
[unit
].ModeRGB
) {
944 case MODE_DOT3_RGB_EXT
:
945 alpha_shift
= key
->unit
[unit
].ScaleShiftA
;
948 case MODE_DOT3_RGBA_EXT
:
953 rgb_shift
= key
->unit
[unit
].ScaleShiftRGB
;
954 alpha_shift
= key
->unit
[unit
].ScaleShiftA
;
958 /* If this is the very last calculation, emit direct to output reg:
960 if (key
->separate_specular
||
961 unit
!= p
->last_tex_stage
||
964 dest
= get_temp( p
);
966 dest
= make_ureg(PROGRAM_OUTPUT
, FRAG_RESULT_COLR
);
968 /* Emit the RGB and A combine ops
970 if (key
->unit
[unit
].ModeRGB
== key
->unit
[unit
].ModeA
&&
971 args_match(key
, unit
)) {
972 out
= emit_combine( p
, dest
, WRITEMASK_XYZW
, saturate
,
974 key
->unit
[unit
].NumArgsRGB
,
975 key
->unit
[unit
].ModeRGB
,
976 key
->unit
[unit
].OptRGB
);
978 else if (key
->unit
[unit
].ModeRGB
== MODE_DOT3_RGBA_EXT
||
979 key
->unit
[unit
].ModeRGB
== MODE_DOT3_RGBA
) {
981 out
= emit_combine( p
, dest
, WRITEMASK_XYZW
, saturate
,
983 key
->unit
[unit
].NumArgsRGB
,
984 key
->unit
[unit
].ModeRGB
,
985 key
->unit
[unit
].OptRGB
);
988 /* Need to do something to stop from re-emitting identical
989 * argument calculations here:
991 out
= emit_combine( p
, dest
, WRITEMASK_XYZ
, saturate
,
993 key
->unit
[unit
].NumArgsRGB
,
994 key
->unit
[unit
].ModeRGB
,
995 key
->unit
[unit
].OptRGB
);
996 out
= emit_combine( p
, dest
, WRITEMASK_W
, saturate
,
998 key
->unit
[unit
].NumArgsA
,
999 key
->unit
[unit
].ModeA
,
1000 key
->unit
[unit
].OptA
);
1003 /* Deal with the final shift:
1005 if (alpha_shift
|| rgb_shift
) {
1006 if (rgb_shift
== alpha_shift
) {
1007 shift
= register_scalar_const(p
, (GLfloat
)(1<<rgb_shift
));
1010 shift
= register_const4f(p
,
1011 (GLfloat
)(1<<rgb_shift
),
1012 (GLfloat
)(1<<rgb_shift
),
1013 (GLfloat
)(1<<rgb_shift
),
1014 (GLfloat
)(1<<alpha_shift
));
1016 return emit_arith( p
, OPCODE_MUL
, dest
, WRITEMASK_XYZW
,
1017 saturate
, out
, shift
, undef
);
1025 * Generate instruction for getting a texture source term.
1027 static void load_texture( struct texenv_fragment_program
*p
, GLuint unit
)
1029 if (is_undef(p
->src_texture
[unit
])) {
1030 GLuint dim
= p
->state
->unit
[unit
].source_index
;
1031 struct ureg texcoord
= register_input(p
, FRAG_ATTRIB_TEX0
+unit
);
1032 struct ureg tmp
= get_tex_temp( p
);
1034 if (dim
== TEXTURE_UNKNOWN_INDEX
)
1035 program_error(p
, "TexSrcBit");
1037 /* TODO: Use D0_MASK_XY where possible.
1039 if (p
->state
->unit
[unit
].enabled
) {
1040 p
->src_texture
[unit
] = emit_texld( p
, OPCODE_TXP
,
1041 tmp
, WRITEMASK_XYZW
,
1042 unit
, dim
, texcoord
);
1043 p
->program
->Base
.SamplersUsed
|= (1 << unit
);
1044 /* This identity mapping should already be in place
1045 * (see _mesa_init_program_struct()) but let's be safe.
1047 p
->program
->Base
.SamplerUnits
[unit
] = unit
;
1050 p
->src_texture
[unit
] = get_zero(p
);
1054 static GLboolean
load_texenv_source( struct texenv_fragment_program
*p
,
1055 GLuint src
, GLuint unit
)
1059 load_texture(p
, unit
);
1070 load_texture(p
, src
- SRC_TEXTURE0
);
1082 * Generate instructions for loading all texture source terms.
1085 load_texunit_sources( struct texenv_fragment_program
*p
, int unit
)
1087 struct state_key
*key
= p
->state
;
1090 for (i
= 0; i
< key
->unit
[unit
].NumArgsRGB
; i
++) {
1091 load_texenv_source( p
, key
->unit
[unit
].OptRGB
[i
].Source
, unit
);
1094 for (i
= 0; i
< key
->unit
[unit
].NumArgsA
; i
++) {
1095 load_texenv_source( p
, key
->unit
[unit
].OptA
[i
].Source
, unit
);
1103 * Generate a new fragment program which implements the context's
1104 * current texture env/combine mode.
1107 create_new_program(GLcontext
*ctx
, struct state_key
*key
,
1108 struct gl_fragment_program
*program
)
1110 struct prog_instruction instBuffer
[MAX_INSTRUCTIONS
];
1111 struct texenv_fragment_program p
;
1113 struct ureg cf
, out
;
1115 _mesa_memset(&p
, 0, sizeof(p
));
1118 p
.program
= program
;
1120 /* During code generation, use locally-allocated instruction buffer,
1121 * then alloc dynamic storage below.
1123 p
.program
->Base
.Instructions
= instBuffer
;
1124 p
.program
->Base
.Target
= GL_FRAGMENT_PROGRAM_ARB
;
1125 p
.program
->Base
.NumTexIndirections
= 1; /* correct? */
1126 p
.program
->Base
.NumTexInstructions
= 0;
1127 p
.program
->Base
.NumAluInstructions
= 0;
1128 p
.program
->Base
.String
= NULL
;
1129 p
.program
->Base
.NumInstructions
=
1130 p
.program
->Base
.NumTemporaries
=
1131 p
.program
->Base
.NumParameters
=
1132 p
.program
->Base
.NumAttributes
= p
.program
->Base
.NumAddressRegs
= 0;
1133 p
.program
->Base
.Parameters
= _mesa_new_parameter_list();
1135 p
.program
->Base
.InputsRead
= 0;
1136 p
.program
->Base
.OutputsWritten
= 1 << FRAG_RESULT_COLR
;
1138 for (unit
= 0; unit
< MAX_TEXTURE_UNITS
; unit
++)
1139 p
.src_texture
[unit
] = undef
;
1141 p
.src_previous
= undef
;
1146 p
.last_tex_stage
= 0;
1147 release_temps(ctx
, &p
);
1149 if (key
->enabled_units
) {
1150 /* First pass - to support texture_env_crossbar, first identify
1151 * all referenced texture sources and emit texld instructions
1154 for (unit
= 0 ; unit
< ctx
->Const
.MaxTextureUnits
; unit
++)
1155 if (key
->unit
[unit
].enabled
) {
1156 load_texunit_sources( &p
, unit
);
1157 p
.last_tex_stage
= unit
;
1160 /* Second pass - emit combine instructions to build final color:
1162 for (unit
= 0 ; unit
< ctx
->Const
.MaxTextureUnits
; unit
++)
1163 if (key
->enabled_units
& (1<<unit
)) {
1164 p
.src_previous
= emit_texenv( &p
, unit
);
1165 reserve_temp(&p
, p
.src_previous
); /* don't re-use this temp reg */
1166 release_temps(ctx
, &p
); /* release all temps */
1170 cf
= get_source( &p
, SRC_PREVIOUS
, 0 );
1171 out
= make_ureg( PROGRAM_OUTPUT
, FRAG_RESULT_COLR
);
1173 if (key
->separate_specular
) {
1174 /* Emit specular add.
1176 struct ureg s
= register_input(&p
, FRAG_ATTRIB_COL1
);
1177 emit_arith( &p
, OPCODE_ADD
, out
, WRITEMASK_XYZ
, 0, cf
, s
, undef
);
1178 emit_arith( &p
, OPCODE_MOV
, out
, WRITEMASK_W
, 0, cf
, undef
, undef
);
1180 else if (_mesa_memcmp(&cf
, &out
, sizeof(cf
)) != 0) {
1181 /* Will wind up in here if no texture enabled or a couple of
1182 * other scenarios (GL_REPLACE for instance).
1184 emit_arith( &p
, OPCODE_MOV
, out
, WRITEMASK_XYZW
, 0, cf
, undef
, undef
);
1189 emit_arith( &p
, OPCODE_END
, undef
, WRITEMASK_XYZW
, 0, undef
, undef
, undef
);
1191 if (key
->fog_enabled
) {
1192 /* Pull fog mode from GLcontext, the value in the state key is
1193 * a reduced value and not what is expected in FogOption
1195 p
.program
->FogOption
= ctx
->Fog
.Mode
;
1196 p
.program
->Base
.InputsRead
|= FRAG_BIT_FOGC
; /* XXX new */
1198 p
.program
->FogOption
= GL_NONE
;
1200 if (p
.program
->Base
.NumTexIndirections
> ctx
->Const
.FragmentProgram
.MaxTexIndirections
)
1201 program_error(&p
, "Exceeded max nr indirect texture lookups");
1203 if (p
.program
->Base
.NumTexInstructions
> ctx
->Const
.FragmentProgram
.MaxTexInstructions
)
1204 program_error(&p
, "Exceeded max TEX instructions");
1206 if (p
.program
->Base
.NumAluInstructions
> ctx
->Const
.FragmentProgram
.MaxAluInstructions
)
1207 program_error(&p
, "Exceeded max ALU instructions");
1209 ASSERT(p
.program
->Base
.NumInstructions
<= MAX_INSTRUCTIONS
);
1211 /* Allocate final instruction array */
1212 p
.program
->Base
.Instructions
1213 = _mesa_alloc_instructions(p
.program
->Base
.NumInstructions
);
1214 if (!p
.program
->Base
.Instructions
) {
1215 _mesa_error(ctx
, GL_OUT_OF_MEMORY
,
1216 "generating tex env program");
1219 _mesa_copy_instructions(p
.program
->Base
.Instructions
, instBuffer
,
1220 p
.program
->Base
.NumInstructions
);
1222 if (p
.program
->FogOption
) {
1223 _mesa_append_fog_code(ctx
, p
.program
);
1224 p
.program
->FogOption
= GL_NONE
;
1228 /* Notify driver the fragment program has (actually) changed.
1230 if (ctx
->Driver
.ProgramStringNotify
) {
1231 ctx
->Driver
.ProgramStringNotify( ctx
, GL_FRAGMENT_PROGRAM_ARB
,
1236 _mesa_print_program(&p
.program
->Base
);
1243 * Return a fragment program which implements the current
1244 * fixed-function texture, fog and color-sum operations.
1246 struct gl_fragment_program
*
1247 _mesa_get_fixed_func_fragment_program(GLcontext
*ctx
)
1249 struct gl_fragment_program
*prog
;
1250 struct state_key key
;
1252 make_state_key(ctx
, &key
);
1254 prog
= (struct gl_fragment_program
*)
1255 _mesa_search_program_cache(ctx
->FragmentProgram
.Cache
,
1259 prog
= (struct gl_fragment_program
*)
1260 ctx
->Driver
.NewProgram(ctx
, GL_FRAGMENT_PROGRAM_ARB
, 0);
1262 create_new_program(ctx
, &key
, prog
);
1264 _mesa_program_cache_insert(ctx
, ctx
->FragmentProgram
.Cache
,
1265 &key
, sizeof(key
), &prog
->Base
);
1274 * If _MaintainTexEnvProgram is set we'll generate a fragment program that
1275 * implements the current texture env/combine mode.
1276 * This function generates that program and puts it into effect.
1279 _mesa_UpdateTexEnvProgram( GLcontext
*ctx
)
1281 const struct gl_fragment_program
*prev
= ctx
->FragmentProgram
._Current
;
1283 ASSERT(ctx
->FragmentProgram
._MaintainTexEnvProgram
);
1285 /* If a conventional fragment program/shader isn't in effect... */
1286 if (!ctx
->FragmentProgram
._Enabled
&&
1287 (!ctx
->Shader
.CurrentProgram
||
1288 !ctx
->Shader
.CurrentProgram
->FragmentProgram
) ) {
1290 ctx
->FragmentProgram
._Current
1291 = ctx
->FragmentProgram
._TexEnvProgram
1292 = _mesa_get_fixed_func_fragment_program(ctx
);
1295 /* Tell the driver about the change. Could define a new target for
1298 if (ctx
->FragmentProgram
._Current
!= prev
&& ctx
->Driver
.BindProgram
) {
1299 ctx
->Driver
.BindProgram(ctx
, GL_FRAGMENT_PROGRAM_ARB
,
1300 (struct gl_program
*) ctx
->FragmentProgram
._Current
);