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 **************************************************************************/
29 * \file ffvertex_prog.c
31 * Create a vertex program to execute the current fixed function T&L pipeline.
32 * \author Keith Whitwell
36 #include "main/glheader.h"
37 #include "main/mtypes.h"
38 #include "main/macros.h"
39 #include "main/mfeatures.h"
40 #include "main/enums.h"
41 #include "main/ffvertex_prog.h"
42 #include "program/program.h"
43 #include "program/prog_cache.h"
44 #include "program/prog_instruction.h"
45 #include "program/prog_parameter.h"
46 #include "program/prog_print.h"
47 #include "program/prog_statevars.h"
50 /** Max of number of lights and texture coord units */
51 #define NUM_UNITS MAX2(MAX_TEXTURE_COORD_UNITS, MAX_LIGHTS)
54 unsigned light_color_material_mask
:12;
55 unsigned light_global_enabled
:1;
56 unsigned light_local_viewer
:1;
57 unsigned light_twoside
:1;
58 unsigned material_shininess_is_zero
:1;
59 unsigned need_eye_coords
:1;
61 unsigned rescale_normals
:1;
63 unsigned fog_source_is_depth
:1;
64 unsigned fog_distance_mode
:2;
65 unsigned separate_specular
:1;
66 unsigned point_attenuated
:1;
67 unsigned point_array
:1;
68 unsigned texture_enabled_global
:1;
69 unsigned fragprog_inputs_read
:12;
71 GLbitfield64 varying_vp_inputs
;
74 unsigned light_enabled
:1;
75 unsigned light_eyepos3_is_zero
:1;
76 unsigned light_spotcutoff_is_180
:1;
77 unsigned light_attenuated
:1;
78 unsigned texunit_really_enabled
:1;
79 unsigned texmat_enabled
:1;
80 unsigned coord_replace
:1;
81 unsigned texgen_enabled
:4;
82 unsigned texgen_mode0
:4;
83 unsigned texgen_mode1
:4;
84 unsigned texgen_mode2
:4;
85 unsigned texgen_mode3
:4;
91 #define TXG_OBJ_LINEAR 1
92 #define TXG_EYE_LINEAR 2
93 #define TXG_SPHERE_MAP 3
94 #define TXG_REFLECTION_MAP 4
95 #define TXG_NORMAL_MAP 5
97 static GLuint
translate_texgen( GLboolean enabled
, GLenum mode
)
103 case GL_OBJECT_LINEAR
: return TXG_OBJ_LINEAR
;
104 case GL_EYE_LINEAR
: return TXG_EYE_LINEAR
;
105 case GL_SPHERE_MAP
: return TXG_SPHERE_MAP
;
106 case GL_REFLECTION_MAP_NV
: return TXG_REFLECTION_MAP
;
107 case GL_NORMAL_MAP_NV
: return TXG_NORMAL_MAP
;
108 default: return TXG_NONE
;
112 #define FDM_EYE_RADIAL 0
113 #define FDM_EYE_PLANE 1
114 #define FDM_EYE_PLANE_ABS 2
116 static GLuint
translate_fog_distance_mode( GLenum mode
)
119 case GL_EYE_RADIAL_NV
:
120 return FDM_EYE_RADIAL
;
122 return FDM_EYE_PLANE
;
123 default: /* shouldn't happen; fall through to a sensible default */
124 case GL_EYE_PLANE_ABSOLUTE_NV
:
125 return FDM_EYE_PLANE_ABS
;
129 static GLboolean
check_active_shininess( struct gl_context
*ctx
,
130 const struct state_key
*key
,
133 GLuint attr
= MAT_ATTRIB_FRONT_SHININESS
+ side
;
135 if ((key
->varying_vp_inputs
& VERT_BIT_COLOR0
) &&
136 (key
->light_color_material_mask
& (1 << attr
)))
139 if (key
->varying_vp_inputs
& VERT_ATTRIB_GENERIC(attr
))
142 if (ctx
->Light
.Material
.Attrib
[attr
][0] != 0.0F
)
149 static void make_state_key( struct gl_context
*ctx
, struct state_key
*key
)
151 const struct gl_fragment_program
*fp
;
154 memset(key
, 0, sizeof(struct state_key
));
155 fp
= ctx
->FragmentProgram
._Current
;
157 /* This now relies on texenvprogram.c being active:
161 key
->need_eye_coords
= ctx
->_NeedEyeCoords
;
163 key
->fragprog_inputs_read
= fp
->Base
.InputsRead
;
164 key
->varying_vp_inputs
= ctx
->varying_vp_inputs
;
166 if (ctx
->RenderMode
== GL_FEEDBACK
) {
167 /* make sure the vertprog emits color and tex0 */
168 key
->fragprog_inputs_read
|= (FRAG_BIT_COL0
| FRAG_BIT_TEX0
);
171 key
->separate_specular
= (ctx
->Light
.Model
.ColorControl
==
172 GL_SEPARATE_SPECULAR_COLOR
);
174 if (ctx
->Light
.Enabled
) {
175 key
->light_global_enabled
= 1;
177 if (ctx
->Light
.Model
.LocalViewer
)
178 key
->light_local_viewer
= 1;
180 if (ctx
->Light
.Model
.TwoSide
)
181 key
->light_twoside
= 1;
183 if (ctx
->Light
.ColorMaterialEnabled
) {
184 key
->light_color_material_mask
= ctx
->Light
.ColorMaterialBitmask
;
187 for (i
= 0; i
< MAX_LIGHTS
; i
++) {
188 struct gl_light
*light
= &ctx
->Light
.Light
[i
];
190 if (light
->Enabled
) {
191 key
->unit
[i
].light_enabled
= 1;
193 if (light
->EyePosition
[3] == 0.0)
194 key
->unit
[i
].light_eyepos3_is_zero
= 1;
196 if (light
->SpotCutoff
== 180.0)
197 key
->unit
[i
].light_spotcutoff_is_180
= 1;
199 if (light
->ConstantAttenuation
!= 1.0 ||
200 light
->LinearAttenuation
!= 0.0 ||
201 light
->QuadraticAttenuation
!= 0.0)
202 key
->unit
[i
].light_attenuated
= 1;
206 if (check_active_shininess(ctx
, key
, 0)) {
207 key
->material_shininess_is_zero
= 0;
209 else if (key
->light_twoside
&&
210 check_active_shininess(ctx
, key
, 1)) {
211 key
->material_shininess_is_zero
= 0;
214 key
->material_shininess_is_zero
= 1;
218 if (ctx
->Transform
.Normalize
)
221 if (ctx
->Transform
.RescaleNormals
)
222 key
->rescale_normals
= 1;
224 if (ctx
->Fog
.FogCoordinateSource
== GL_FRAGMENT_DEPTH_EXT
) {
225 key
->fog_source_is_depth
= 1;
226 key
->fog_distance_mode
= translate_fog_distance_mode(ctx
->Fog
.FogDistanceMode
);
229 if (ctx
->Point
._Attenuated
)
230 key
->point_attenuated
= 1;
232 #if FEATURE_point_size_array
233 if (ctx
->Array
.ArrayObj
->VertexAttrib
[VERT_ATTRIB_POINT_SIZE
].Enabled
)
234 key
->point_array
= 1;
237 if (ctx
->Texture
._TexGenEnabled
||
238 ctx
->Texture
._TexMatEnabled
||
239 ctx
->Texture
._EnabledUnits
)
240 key
->texture_enabled_global
= 1;
242 for (i
= 0; i
< MAX_TEXTURE_COORD_UNITS
; i
++) {
243 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[i
];
245 if (texUnit
->_ReallyEnabled
)
246 key
->unit
[i
].texunit_really_enabled
= 1;
248 if (ctx
->Point
.PointSprite
)
249 if (ctx
->Point
.CoordReplace
[i
])
250 key
->unit
[i
].coord_replace
= 1;
252 if (ctx
->Texture
._TexMatEnabled
& ENABLE_TEXMAT(i
))
253 key
->unit
[i
].texmat_enabled
= 1;
255 if (texUnit
->TexGenEnabled
) {
256 key
->unit
[i
].texgen_enabled
= 1;
258 key
->unit
[i
].texgen_mode0
=
259 translate_texgen( texUnit
->TexGenEnabled
& (1<<0),
260 texUnit
->GenS
.Mode
);
261 key
->unit
[i
].texgen_mode1
=
262 translate_texgen( texUnit
->TexGenEnabled
& (1<<1),
263 texUnit
->GenT
.Mode
);
264 key
->unit
[i
].texgen_mode2
=
265 translate_texgen( texUnit
->TexGenEnabled
& (1<<2),
266 texUnit
->GenR
.Mode
);
267 key
->unit
[i
].texgen_mode3
=
268 translate_texgen( texUnit
->TexGenEnabled
& (1<<3),
269 texUnit
->GenQ
.Mode
);
276 /* Very useful debugging tool - produces annotated listing of
277 * generated program with line/function references for each
278 * instruction back into this file:
283 /* Use uregs to represent registers internally, translate to Mesa's
284 * expected formats on emit.
286 * NOTE: These are passed by value extensively in this file rather
287 * than as usual by pointer reference. If this disturbs you, try
288 * remembering they are just 32bits in size.
290 * GCC is smart enough to deal with these dword-sized structures in
291 * much the same way as if I had defined them as dwords and was using
292 * macros to access and set the fields. This is much nicer and easier
297 GLint idx
:9; /* relative addressing may be negative */
298 /* sizeof(idx) should == sizeof(prog_src_reg::Index) */
306 const struct state_key
*state
;
307 struct gl_vertex_program
*program
;
308 GLint max_inst
; /** number of instructions allocated for program */
309 GLboolean mvp_with_dp4
;
312 GLuint temp_reserved
;
314 struct ureg eye_position
;
315 struct ureg eye_position_z
;
316 struct ureg eye_position_normalized
;
317 struct ureg transformed_normal
;
318 struct ureg identity
;
321 GLuint color_materials
;
325 static const struct ureg undef
= {
343 static struct ureg
make_ureg(GLuint file
, GLint idx
)
349 reg
.swz
= SWIZZLE_NOOP
;
356 static struct ureg
negate( struct ureg reg
)
363 static struct ureg
swizzle( struct ureg reg
, int x
, int y
, int z
, int w
)
365 reg
.swz
= MAKE_SWIZZLE4(GET_SWZ(reg
.swz
, x
),
368 GET_SWZ(reg
.swz
, w
));
373 static struct ureg
swizzle1( struct ureg reg
, int x
)
375 return swizzle(reg
, x
, x
, x
, x
);
379 static struct ureg
get_temp( struct tnl_program
*p
)
381 int bit
= ffs( ~p
->temp_in_use
);
383 _mesa_problem(NULL
, "%s: out of temporaries\n", __FILE__
);
387 if ((GLuint
) bit
> p
->program
->Base
.NumTemporaries
)
388 p
->program
->Base
.NumTemporaries
= bit
;
390 p
->temp_in_use
|= 1<<(bit
-1);
391 return make_ureg(PROGRAM_TEMPORARY
, bit
-1);
395 static struct ureg
reserve_temp( struct tnl_program
*p
)
397 struct ureg temp
= get_temp( p
);
398 p
->temp_reserved
|= 1<<temp
.idx
;
403 static void release_temp( struct tnl_program
*p
, struct ureg reg
)
405 if (reg
.file
== PROGRAM_TEMPORARY
) {
406 p
->temp_in_use
&= ~(1<<reg
.idx
);
407 p
->temp_in_use
|= p
->temp_reserved
; /* can't release reserved temps */
411 static void release_temps( struct tnl_program
*p
)
413 p
->temp_in_use
= p
->temp_reserved
;
417 static struct ureg
register_param5(struct tnl_program
*p
,
424 gl_state_index tokens
[STATE_LENGTH
];
431 idx
= _mesa_add_state_reference( p
->program
->Base
.Parameters
, tokens
);
432 return make_ureg(PROGRAM_STATE_VAR
, idx
);
436 #define register_param1(p,s0) register_param5(p,s0,0,0,0,0)
437 #define register_param2(p,s0,s1) register_param5(p,s0,s1,0,0,0)
438 #define register_param3(p,s0,s1,s2) register_param5(p,s0,s1,s2,0,0)
439 #define register_param4(p,s0,s1,s2,s3) register_param5(p,s0,s1,s2,s3,0)
444 * \param input one of VERT_ATTRIB_x tokens.
446 static struct ureg
register_input( struct tnl_program
*p
, GLuint input
)
448 assert(input
< VERT_ATTRIB_MAX
);
450 if (p
->state
->varying_vp_inputs
& VERT_BIT(input
)) {
451 p
->program
->Base
.InputsRead
|= VERT_BIT(input
);
452 return make_ureg(PROGRAM_INPUT
, input
);
455 return register_param3( p
, STATE_INTERNAL
, STATE_CURRENT_ATTRIB
, input
);
461 * \param input one of VERT_RESULT_x tokens.
463 static struct ureg
register_output( struct tnl_program
*p
, GLuint output
)
465 p
->program
->Base
.OutputsWritten
|= BITFIELD64_BIT(output
);
466 return make_ureg(PROGRAM_OUTPUT
, output
);
470 static struct ureg
register_const4f( struct tnl_program
*p
,
476 gl_constant_value values
[4];
483 idx
= _mesa_add_unnamed_constant( p
->program
->Base
.Parameters
, values
, 4,
485 ASSERT(swizzle
== SWIZZLE_NOOP
);
486 return make_ureg(PROGRAM_CONSTANT
, idx
);
489 #define register_const1f(p, s0) register_const4f(p, s0, 0, 0, 1)
490 #define register_scalar_const(p, s0) register_const4f(p, s0, s0, s0, s0)
491 #define register_const2f(p, s0, s1) register_const4f(p, s0, s1, 0, 1)
492 #define register_const3f(p, s0, s1, s2) register_const4f(p, s0, s1, s2, 1)
494 static GLboolean
is_undef( struct ureg reg
)
496 return reg
.file
== PROGRAM_UNDEFINED
;
500 static struct ureg
get_identity_param( struct tnl_program
*p
)
502 if (is_undef(p
->identity
))
503 p
->identity
= register_const4f(p
, 0,0,0,1);
508 static void register_matrix_param5( struct tnl_program
*p
,
509 GLint s0
, /* modelview, projection, etc */
510 GLint s1
, /* texture matrix number */
511 GLint s2
, /* first row */
512 GLint s3
, /* last row */
513 GLint s4
, /* inverse, transpose, etc */
514 struct ureg
*matrix
)
518 /* This is a bit sad as the support is there to pull the whole
519 * matrix out in one go:
521 for (i
= 0; i
<= s3
- s2
; i
++)
522 matrix
[i
] = register_param5( p
, s0
, s1
, i
, i
, s4
);
526 static void emit_arg( struct prog_src_register
*src
,
529 src
->File
= reg
.file
;
530 src
->Index
= reg
.idx
;
531 src
->Swizzle
= reg
.swz
;
532 src
->Negate
= reg
.negate
? NEGATE_XYZW
: NEGATE_NONE
;
535 /* Check that bitfield sizes aren't exceeded */
536 ASSERT(src
->Index
== reg
.idx
);
540 static void emit_dst( struct prog_dst_register
*dst
,
541 struct ureg reg
, GLuint mask
)
543 dst
->File
= reg
.file
;
544 dst
->Index
= reg
.idx
;
545 /* allow zero as a shorthand for xyzw */
546 dst
->WriteMask
= mask
? mask
: WRITEMASK_XYZW
;
547 dst
->CondMask
= COND_TR
; /* always pass cond test */
548 dst
->CondSwizzle
= SWIZZLE_NOOP
;
550 /* Check that bitfield sizes aren't exceeded */
551 ASSERT(dst
->Index
== reg
.idx
);
555 static void debug_insn( struct prog_instruction
*inst
, const char *fn
,
559 static const char *last_fn
;
566 printf("%d:\t", line
);
567 _mesa_print_instruction(inst
);
572 static void emit_op3fn(struct tnl_program
*p
,
583 struct prog_instruction
*inst
;
585 assert((GLint
) p
->program
->Base
.NumInstructions
<= p
->max_inst
);
587 if (p
->program
->Base
.NumInstructions
== p
->max_inst
) {
588 /* need to extend the program's instruction array */
589 struct prog_instruction
*newInst
;
591 /* double the size */
594 newInst
= _mesa_alloc_instructions(p
->max_inst
);
596 _mesa_error(NULL
, GL_OUT_OF_MEMORY
, "vertex program build");
600 _mesa_copy_instructions(newInst
,
601 p
->program
->Base
.Instructions
,
602 p
->program
->Base
.NumInstructions
);
604 _mesa_free_instructions(p
->program
->Base
.Instructions
,
605 p
->program
->Base
.NumInstructions
);
607 p
->program
->Base
.Instructions
= newInst
;
610 nr
= p
->program
->Base
.NumInstructions
++;
612 inst
= &p
->program
->Base
.Instructions
[nr
];
613 inst
->Opcode
= (enum prog_opcode
) op
;
616 emit_arg( &inst
->SrcReg
[0], src0
);
617 emit_arg( &inst
->SrcReg
[1], src1
);
618 emit_arg( &inst
->SrcReg
[2], src2
);
620 emit_dst( &inst
->DstReg
, dest
, mask
);
622 debug_insn(inst
, fn
, line
);
626 #define emit_op3(p, op, dst, mask, src0, src1, src2) \
627 emit_op3fn(p, op, dst, mask, src0, src1, src2, __FUNCTION__, __LINE__)
629 #define emit_op2(p, op, dst, mask, src0, src1) \
630 emit_op3fn(p, op, dst, mask, src0, src1, undef, __FUNCTION__, __LINE__)
632 #define emit_op1(p, op, dst, mask, src0) \
633 emit_op3fn(p, op, dst, mask, src0, undef, undef, __FUNCTION__, __LINE__)
636 static struct ureg
make_temp( struct tnl_program
*p
, struct ureg reg
)
638 if (reg
.file
== PROGRAM_TEMPORARY
&&
639 !(p
->temp_reserved
& (1<<reg
.idx
)))
642 struct ureg temp
= get_temp(p
);
643 emit_op1(p
, OPCODE_MOV
, temp
, 0, reg
);
649 /* Currently no tracking performed of input/output/register size or
650 * active elements. Could be used to reduce these operations, as
651 * could the matrix type.
653 static void emit_matrix_transform_vec4( struct tnl_program
*p
,
655 const struct ureg
*mat
,
658 emit_op2(p
, OPCODE_DP4
, dest
, WRITEMASK_X
, src
, mat
[0]);
659 emit_op2(p
, OPCODE_DP4
, dest
, WRITEMASK_Y
, src
, mat
[1]);
660 emit_op2(p
, OPCODE_DP4
, dest
, WRITEMASK_Z
, src
, mat
[2]);
661 emit_op2(p
, OPCODE_DP4
, dest
, WRITEMASK_W
, src
, mat
[3]);
665 /* This version is much easier to implement if writemasks are not
666 * supported natively on the target or (like SSE), the target doesn't
667 * have a clean/obvious dotproduct implementation.
669 static void emit_transpose_matrix_transform_vec4( struct tnl_program
*p
,
671 const struct ureg
*mat
,
676 if (dest
.file
!= PROGRAM_TEMPORARY
)
681 emit_op2(p
, OPCODE_MUL
, tmp
, 0, swizzle1(src
,X
), mat
[0]);
682 emit_op3(p
, OPCODE_MAD
, tmp
, 0, swizzle1(src
,Y
), mat
[1], tmp
);
683 emit_op3(p
, OPCODE_MAD
, tmp
, 0, swizzle1(src
,Z
), mat
[2], tmp
);
684 emit_op3(p
, OPCODE_MAD
, dest
, 0, swizzle1(src
,W
), mat
[3], tmp
);
686 if (dest
.file
!= PROGRAM_TEMPORARY
)
687 release_temp(p
, tmp
);
691 static void emit_matrix_transform_vec3( struct tnl_program
*p
,
693 const struct ureg
*mat
,
696 emit_op2(p
, OPCODE_DP3
, dest
, WRITEMASK_X
, src
, mat
[0]);
697 emit_op2(p
, OPCODE_DP3
, dest
, WRITEMASK_Y
, src
, mat
[1]);
698 emit_op2(p
, OPCODE_DP3
, dest
, WRITEMASK_Z
, src
, mat
[2]);
702 static void emit_normalize_vec3( struct tnl_program
*p
,
707 /* XXX use this when drivers are ready for NRM3 */
708 emit_op1(p
, OPCODE_NRM3
, dest
, WRITEMASK_XYZ
, src
);
710 struct ureg tmp
= get_temp(p
);
711 emit_op2(p
, OPCODE_DP3
, tmp
, WRITEMASK_X
, src
, src
);
712 emit_op1(p
, OPCODE_RSQ
, tmp
, WRITEMASK_X
, tmp
);
713 emit_op2(p
, OPCODE_MUL
, dest
, 0, src
, swizzle1(tmp
, X
));
714 release_temp(p
, tmp
);
719 static void emit_passthrough( struct tnl_program
*p
,
723 struct ureg out
= register_output(p
, output
);
724 emit_op1(p
, OPCODE_MOV
, out
, 0, register_input(p
, input
));
728 static struct ureg
get_eye_position( struct tnl_program
*p
)
730 if (is_undef(p
->eye_position
)) {
731 struct ureg pos
= register_input( p
, VERT_ATTRIB_POS
);
732 struct ureg modelview
[4];
734 p
->eye_position
= reserve_temp(p
);
736 if (p
->mvp_with_dp4
) {
737 register_matrix_param5( p
, STATE_MODELVIEW_MATRIX
, 0, 0, 3,
740 emit_matrix_transform_vec4(p
, p
->eye_position
, modelview
, pos
);
743 register_matrix_param5( p
, STATE_MODELVIEW_MATRIX
, 0, 0, 3,
744 STATE_MATRIX_TRANSPOSE
, modelview
);
746 emit_transpose_matrix_transform_vec4(p
, p
->eye_position
, modelview
, pos
);
750 return p
->eye_position
;
754 static struct ureg
get_eye_position_z( struct tnl_program
*p
)
756 if (!is_undef(p
->eye_position
))
757 return swizzle1(p
->eye_position
, Z
);
759 if (is_undef(p
->eye_position_z
)) {
760 struct ureg pos
= register_input( p
, VERT_ATTRIB_POS
);
761 struct ureg modelview
[4];
763 p
->eye_position_z
= reserve_temp(p
);
765 register_matrix_param5( p
, STATE_MODELVIEW_MATRIX
, 0, 0, 3,
768 emit_op2(p
, OPCODE_DP4
, p
->eye_position_z
, 0, pos
, modelview
[2]);
771 return p
->eye_position_z
;
775 static struct ureg
get_eye_position_normalized( struct tnl_program
*p
)
777 if (is_undef(p
->eye_position_normalized
)) {
778 struct ureg eye
= get_eye_position(p
);
779 p
->eye_position_normalized
= reserve_temp(p
);
780 emit_normalize_vec3(p
, p
->eye_position_normalized
, eye
);
783 return p
->eye_position_normalized
;
787 static struct ureg
get_transformed_normal( struct tnl_program
*p
)
789 if (is_undef(p
->transformed_normal
) &&
790 !p
->state
->need_eye_coords
&&
791 !p
->state
->normalize
&&
792 !(p
->state
->need_eye_coords
== p
->state
->rescale_normals
))
794 p
->transformed_normal
= register_input(p
, VERT_ATTRIB_NORMAL
);
796 else if (is_undef(p
->transformed_normal
))
798 struct ureg normal
= register_input(p
, VERT_ATTRIB_NORMAL
);
799 struct ureg mvinv
[3];
800 struct ureg transformed_normal
= reserve_temp(p
);
802 if (p
->state
->need_eye_coords
) {
803 register_matrix_param5( p
, STATE_MODELVIEW_MATRIX
, 0, 0, 2,
804 STATE_MATRIX_INVTRANS
, mvinv
);
806 /* Transform to eye space:
808 emit_matrix_transform_vec3( p
, transformed_normal
, mvinv
, normal
);
809 normal
= transformed_normal
;
812 /* Normalize/Rescale:
814 if (p
->state
->normalize
) {
815 emit_normalize_vec3( p
, transformed_normal
, normal
);
816 normal
= transformed_normal
;
818 else if (p
->state
->need_eye_coords
== p
->state
->rescale_normals
) {
819 /* This is already adjusted for eye/non-eye rendering:
821 struct ureg rescale
= register_param2(p
, STATE_INTERNAL
,
824 emit_op2( p
, OPCODE_MUL
, transformed_normal
, 0, normal
, rescale
);
825 normal
= transformed_normal
;
828 assert(normal
.file
== PROGRAM_TEMPORARY
);
829 p
->transformed_normal
= normal
;
832 return p
->transformed_normal
;
836 static void build_hpos( struct tnl_program
*p
)
838 struct ureg pos
= register_input( p
, VERT_ATTRIB_POS
);
839 struct ureg hpos
= register_output( p
, VERT_RESULT_HPOS
);
842 if (p
->mvp_with_dp4
) {
843 register_matrix_param5( p
, STATE_MVP_MATRIX
, 0, 0, 3,
845 emit_matrix_transform_vec4( p
, hpos
, mvp
, pos
);
848 register_matrix_param5( p
, STATE_MVP_MATRIX
, 0, 0, 3,
849 STATE_MATRIX_TRANSPOSE
, mvp
);
850 emit_transpose_matrix_transform_vec4( p
, hpos
, mvp
, pos
);
855 static GLuint
material_attrib( GLuint side
, GLuint property
)
857 return (property
- STATE_AMBIENT
) * 2 + side
;
862 * Get a bitmask of which material values vary on a per-vertex basis.
864 static void set_material_flags( struct tnl_program
*p
)
866 p
->color_materials
= 0;
869 if (p
->state
->varying_vp_inputs
& VERT_BIT_COLOR0
) {
871 p
->color_materials
= p
->state
->light_color_material_mask
;
874 p
->materials
|= (p
->state
->varying_vp_inputs
>> VERT_ATTRIB_GENERIC0
);
878 static struct ureg
get_material( struct tnl_program
*p
, GLuint side
,
881 GLuint attrib
= material_attrib(side
, property
);
883 if (p
->color_materials
& (1<<attrib
))
884 return register_input(p
, VERT_ATTRIB_COLOR0
);
885 else if (p
->materials
& (1<<attrib
)) {
886 /* Put material values in the GENERIC slots -- they are not used
887 * for anything in fixed function mode.
889 return register_input( p
, attrib
+ VERT_ATTRIB_GENERIC0
);
892 return register_param3( p
, STATE_MATERIAL
, side
, property
);
895 #define SCENE_COLOR_BITS(side) (( MAT_BIT_FRONT_EMISSION | \
896 MAT_BIT_FRONT_AMBIENT | \
897 MAT_BIT_FRONT_DIFFUSE) << (side))
901 * Either return a precalculated constant value or emit code to
902 * calculate these values dynamically in the case where material calls
903 * are present between begin/end pairs.
905 * Probably want to shift this to the program compilation phase - if
906 * we always emitted the calculation here, a smart compiler could
907 * detect that it was constant (given a certain set of inputs), and
908 * lift it out of the main loop. That way the programs created here
909 * would be independent of the vertex_buffer details.
911 static struct ureg
get_scenecolor( struct tnl_program
*p
, GLuint side
)
913 if (p
->materials
& SCENE_COLOR_BITS(side
)) {
914 struct ureg lm_ambient
= register_param1(p
, STATE_LIGHTMODEL_AMBIENT
);
915 struct ureg material_emission
= get_material(p
, side
, STATE_EMISSION
);
916 struct ureg material_ambient
= get_material(p
, side
, STATE_AMBIENT
);
917 struct ureg material_diffuse
= get_material(p
, side
, STATE_DIFFUSE
);
918 struct ureg tmp
= make_temp(p
, material_diffuse
);
919 emit_op3(p
, OPCODE_MAD
, tmp
, WRITEMASK_XYZ
, lm_ambient
,
920 material_ambient
, material_emission
);
924 return register_param2( p
, STATE_LIGHTMODEL_SCENECOLOR
, side
);
928 static struct ureg
get_lightprod( struct tnl_program
*p
, GLuint light
,
929 GLuint side
, GLuint property
)
931 GLuint attrib
= material_attrib(side
, property
);
932 if (p
->materials
& (1<<attrib
)) {
933 struct ureg light_value
=
934 register_param3(p
, STATE_LIGHT
, light
, property
);
935 struct ureg material_value
= get_material(p
, side
, property
);
936 struct ureg tmp
= get_temp(p
);
937 emit_op2(p
, OPCODE_MUL
, tmp
, 0, light_value
, material_value
);
941 return register_param4(p
, STATE_LIGHTPROD
, light
, side
, property
);
945 static struct ureg
calculate_light_attenuation( struct tnl_program
*p
,
950 struct ureg attenuation
= register_param3(p
, STATE_LIGHT
, i
,
952 struct ureg att
= undef
;
954 /* Calculate spot attenuation:
956 if (!p
->state
->unit
[i
].light_spotcutoff_is_180
) {
957 struct ureg spot_dir_norm
= register_param3(p
, STATE_INTERNAL
,
958 STATE_LIGHT_SPOT_DIR_NORMALIZED
, i
);
959 struct ureg spot
= get_temp(p
);
960 struct ureg slt
= get_temp(p
);
964 emit_op2(p
, OPCODE_DP3
, spot
, 0, negate(VPpli
), spot_dir_norm
);
965 emit_op2(p
, OPCODE_SLT
, slt
, 0, swizzle1(spot_dir_norm
,W
), spot
);
966 emit_op2(p
, OPCODE_POW
, spot
, 0, spot
, swizzle1(attenuation
, W
));
967 emit_op2(p
, OPCODE_MUL
, att
, 0, slt
, spot
);
969 release_temp(p
, spot
);
970 release_temp(p
, slt
);
973 /* Calculate distance attenuation(See formula (2.4) at glspec 2.1 page 62):
975 * Skip the calucation when _dist_ is undefined(light_eyepos3_is_zero)
977 if (p
->state
->unit
[i
].light_attenuated
&& !is_undef(dist
)) {
981 emit_op1(p
, OPCODE_RCP
, dist
, WRITEMASK_YZ
, dist
);
983 emit_op2(p
, OPCODE_MUL
, dist
, WRITEMASK_XZ
, dist
, swizzle1(dist
,Y
));
985 emit_op2(p
, OPCODE_DP3
, dist
, 0, attenuation
, dist
);
987 if (!p
->state
->unit
[i
].light_spotcutoff_is_180
) {
989 emit_op1(p
, OPCODE_RCP
, dist
, 0, dist
);
990 /* spot-atten * dist-atten */
991 emit_op2(p
, OPCODE_MUL
, att
, 0, dist
, att
);
995 emit_op1(p
, OPCODE_RCP
, att
, 0, dist
);
1005 * lit.y = MAX(0, dots.x)
1006 * lit.z = SLT(0, dots.x)
1008 static void emit_degenerate_lit( struct tnl_program
*p
,
1012 struct ureg id
= get_identity_param(p
); /* id = {0,0,0,1} */
1014 /* Note that lit.x & lit.w will not be examined. Note also that
1015 * dots.xyzw == dots.xxxx.
1018 /* MAX lit, id, dots;
1020 emit_op2(p
, OPCODE_MAX
, lit
, WRITEMASK_XYZW
, id
, dots
);
1022 /* result[2] = (in > 0 ? 1 : 0)
1023 * SLT lit.z, id.z, dots; # lit.z = (0 < dots.z) ? 1 : 0
1025 emit_op2(p
, OPCODE_SLT
, lit
, WRITEMASK_Z
, swizzle1(id
,Z
), dots
);
1029 /* Need to add some addtional parameters to allow lighting in object
1030 * space - STATE_SPOT_DIRECTION and STATE_HALF_VECTOR implicitly assume eye
1033 static void build_lighting( struct tnl_program
*p
)
1035 const GLboolean twoside
= p
->state
->light_twoside
;
1036 const GLboolean separate
= p
->state
->separate_specular
;
1037 GLuint nr_lights
= 0, count
= 0;
1038 struct ureg normal
= get_transformed_normal(p
);
1039 struct ureg lit
= get_temp(p
);
1040 struct ureg dots
= get_temp(p
);
1041 struct ureg _col0
= undef
, _col1
= undef
;
1042 struct ureg _bfc0
= undef
, _bfc1
= undef
;
1047 * dots.x = dot(normal, VPpli)
1048 * dots.y = dot(normal, halfAngle)
1049 * dots.z = back.shininess
1050 * dots.w = front.shininess
1053 for (i
= 0; i
< MAX_LIGHTS
; i
++)
1054 if (p
->state
->unit
[i
].light_enabled
)
1057 set_material_flags(p
);
1060 if (!p
->state
->material_shininess_is_zero
) {
1061 struct ureg shininess
= get_material(p
, 0, STATE_SHININESS
);
1062 emit_op1(p
, OPCODE_MOV
, dots
, WRITEMASK_W
, swizzle1(shininess
,X
));
1063 release_temp(p
, shininess
);
1066 _col0
= make_temp(p
, get_scenecolor(p
, 0));
1068 _col1
= make_temp(p
, get_identity_param(p
));
1074 if (!p
->state
->material_shininess_is_zero
) {
1075 /* Note that we negate the back-face specular exponent here.
1076 * The negation will be un-done later in the back-face code below.
1078 struct ureg shininess
= get_material(p
, 1, STATE_SHININESS
);
1079 emit_op1(p
, OPCODE_MOV
, dots
, WRITEMASK_Z
,
1080 negate(swizzle1(shininess
,X
)));
1081 release_temp(p
, shininess
);
1084 _bfc0
= make_temp(p
, get_scenecolor(p
, 1));
1086 _bfc1
= make_temp(p
, get_identity_param(p
));
1091 /* If no lights, still need to emit the scenecolor.
1094 struct ureg res0
= register_output( p
, VERT_RESULT_COL0
);
1095 emit_op1(p
, OPCODE_MOV
, res0
, 0, _col0
);
1099 struct ureg res1
= register_output( p
, VERT_RESULT_COL1
);
1100 emit_op1(p
, OPCODE_MOV
, res1
, 0, _col1
);
1104 struct ureg res0
= register_output( p
, VERT_RESULT_BFC0
);
1105 emit_op1(p
, OPCODE_MOV
, res0
, 0, _bfc0
);
1108 if (twoside
&& separate
) {
1109 struct ureg res1
= register_output( p
, VERT_RESULT_BFC1
);
1110 emit_op1(p
, OPCODE_MOV
, res1
, 0, _bfc1
);
1113 if (nr_lights
== 0) {
1118 for (i
= 0; i
< MAX_LIGHTS
; i
++) {
1119 if (p
->state
->unit
[i
].light_enabled
) {
1120 struct ureg half
= undef
;
1121 struct ureg att
= undef
, VPpli
= undef
;
1122 struct ureg dist
= undef
;
1125 if (p
->state
->unit
[i
].light_eyepos3_is_zero
) {
1126 VPpli
= register_param3(p
, STATE_INTERNAL
,
1127 STATE_LIGHT_POSITION_NORMALIZED
, i
);
1129 struct ureg Ppli
= register_param3(p
, STATE_INTERNAL
,
1130 STATE_LIGHT_POSITION
, i
);
1131 struct ureg V
= get_eye_position(p
);
1133 VPpli
= get_temp(p
);
1136 /* Calculate VPpli vector
1138 emit_op2(p
, OPCODE_SUB
, VPpli
, 0, Ppli
, V
);
1140 /* Normalize VPpli. The dist value also used in
1141 * attenuation below.
1143 emit_op2(p
, OPCODE_DP3
, dist
, 0, VPpli
, VPpli
);
1144 emit_op1(p
, OPCODE_RSQ
, dist
, 0, dist
);
1145 emit_op2(p
, OPCODE_MUL
, VPpli
, 0, VPpli
, dist
);
1148 /* Calculate attenuation:
1150 att
= calculate_light_attenuation(p
, i
, VPpli
, dist
);
1151 release_temp(p
, dist
);
1153 /* Calculate viewer direction, or use infinite viewer:
1155 if (!p
->state
->material_shininess_is_zero
) {
1156 if (p
->state
->light_local_viewer
) {
1157 struct ureg eye_hat
= get_eye_position_normalized(p
);
1159 emit_op2(p
, OPCODE_SUB
, half
, 0, VPpli
, eye_hat
);
1160 emit_normalize_vec3(p
, half
, half
);
1161 } else if (p
->state
->unit
[i
].light_eyepos3_is_zero
) {
1162 half
= register_param3(p
, STATE_INTERNAL
,
1163 STATE_LIGHT_HALF_VECTOR
, i
);
1165 struct ureg z_dir
= swizzle(get_identity_param(p
),X
,Y
,W
,Z
);
1167 emit_op2(p
, OPCODE_ADD
, half
, 0, VPpli
, z_dir
);
1168 emit_normalize_vec3(p
, half
, half
);
1172 /* Calculate dot products:
1174 if (p
->state
->material_shininess_is_zero
) {
1175 emit_op2(p
, OPCODE_DP3
, dots
, 0, normal
, VPpli
);
1178 emit_op2(p
, OPCODE_DP3
, dots
, WRITEMASK_X
, normal
, VPpli
);
1179 emit_op2(p
, OPCODE_DP3
, dots
, WRITEMASK_Y
, normal
, half
);
1182 /* Front face lighting:
1185 struct ureg ambient
= get_lightprod(p
, i
, 0, STATE_AMBIENT
);
1186 struct ureg diffuse
= get_lightprod(p
, i
, 0, STATE_DIFFUSE
);
1187 struct ureg specular
= get_lightprod(p
, i
, 0, STATE_SPECULAR
);
1188 struct ureg res0
, res1
;
1189 GLuint mask0
, mask1
;
1191 if (count
== nr_lights
) {
1193 mask0
= WRITEMASK_XYZ
;
1194 mask1
= WRITEMASK_XYZ
;
1195 res0
= register_output( p
, VERT_RESULT_COL0
);
1196 res1
= register_output( p
, VERT_RESULT_COL1
);
1200 mask1
= WRITEMASK_XYZ
;
1202 res1
= register_output( p
, VERT_RESULT_COL0
);
1212 if (!is_undef(att
)) {
1213 /* light is attenuated by distance */
1214 emit_op1(p
, OPCODE_LIT
, lit
, 0, dots
);
1215 emit_op2(p
, OPCODE_MUL
, lit
, 0, lit
, att
);
1216 emit_op3(p
, OPCODE_MAD
, _col0
, 0, swizzle1(lit
,X
), ambient
, _col0
);
1218 else if (!p
->state
->material_shininess_is_zero
) {
1219 /* there's a non-zero specular term */
1220 emit_op1(p
, OPCODE_LIT
, lit
, 0, dots
);
1221 emit_op2(p
, OPCODE_ADD
, _col0
, 0, ambient
, _col0
);
1224 /* no attenutation, no specular */
1225 emit_degenerate_lit(p
, lit
, dots
);
1226 emit_op2(p
, OPCODE_ADD
, _col0
, 0, ambient
, _col0
);
1229 emit_op3(p
, OPCODE_MAD
, res0
, mask0
, swizzle1(lit
,Y
), diffuse
, _col0
);
1230 emit_op3(p
, OPCODE_MAD
, res1
, mask1
, swizzle1(lit
,Z
), specular
, _col1
);
1232 release_temp(p
, ambient
);
1233 release_temp(p
, diffuse
);
1234 release_temp(p
, specular
);
1237 /* Back face lighting:
1240 struct ureg ambient
= get_lightprod(p
, i
, 1, STATE_AMBIENT
);
1241 struct ureg diffuse
= get_lightprod(p
, i
, 1, STATE_DIFFUSE
);
1242 struct ureg specular
= get_lightprod(p
, i
, 1, STATE_SPECULAR
);
1243 struct ureg res0
, res1
;
1244 GLuint mask0
, mask1
;
1246 if (count
== nr_lights
) {
1248 mask0
= WRITEMASK_XYZ
;
1249 mask1
= WRITEMASK_XYZ
;
1250 res0
= register_output( p
, VERT_RESULT_BFC0
);
1251 res1
= register_output( p
, VERT_RESULT_BFC1
);
1255 mask1
= WRITEMASK_XYZ
;
1257 res1
= register_output( p
, VERT_RESULT_BFC0
);
1267 /* For the back face we need to negate the X and Y component
1268 * dot products. dots.Z has the negated back-face specular
1269 * exponent. We swizzle that into the W position. This
1270 * negation makes the back-face specular term positive again.
1272 dots
= negate(swizzle(dots
,X
,Y
,W
,Z
));
1274 if (!is_undef(att
)) {
1275 emit_op1(p
, OPCODE_LIT
, lit
, 0, dots
);
1276 emit_op2(p
, OPCODE_MUL
, lit
, 0, lit
, att
);
1277 emit_op3(p
, OPCODE_MAD
, _bfc0
, 0, swizzle1(lit
,X
), ambient
, _bfc0
);
1279 else if (!p
->state
->material_shininess_is_zero
) {
1280 emit_op1(p
, OPCODE_LIT
, lit
, 0, dots
);
1281 emit_op2(p
, OPCODE_ADD
, _bfc0
, 0, ambient
, _bfc0
); /**/
1284 emit_degenerate_lit(p
, lit
, dots
);
1285 emit_op2(p
, OPCODE_ADD
, _bfc0
, 0, ambient
, _bfc0
);
1288 emit_op3(p
, OPCODE_MAD
, res0
, mask0
, swizzle1(lit
,Y
), diffuse
, _bfc0
);
1289 emit_op3(p
, OPCODE_MAD
, res1
, mask1
, swizzle1(lit
,Z
), specular
, _bfc1
);
1290 /* restore dots to its original state for subsequent lights
1291 * by negating and swizzling again.
1293 dots
= negate(swizzle(dots
,X
,Y
,W
,Z
));
1295 release_temp(p
, ambient
);
1296 release_temp(p
, diffuse
);
1297 release_temp(p
, specular
);
1300 release_temp(p
, half
);
1301 release_temp(p
, VPpli
);
1302 release_temp(p
, att
);
1310 static void build_fog( struct tnl_program
*p
)
1312 struct ureg fog
= register_output(p
, VERT_RESULT_FOGC
);
1315 if (p
->state
->fog_source_is_depth
) {
1317 switch (p
->state
->fog_distance_mode
) {
1318 case FDM_EYE_RADIAL
: /* Z = sqrt(Xe*Xe + Ye*Ye + Ze*Ze) */
1319 input
= get_eye_position(p
);
1320 emit_op2(p
, OPCODE_DP3
, fog
, WRITEMASK_X
, input
, input
);
1321 emit_op1(p
, OPCODE_RSQ
, fog
, WRITEMASK_X
, fog
);
1322 emit_op1(p
, OPCODE_RCP
, fog
, WRITEMASK_X
, fog
);
1324 case FDM_EYE_PLANE
: /* Z = Ze */
1325 input
= get_eye_position_z(p
);
1326 emit_op1(p
, OPCODE_MOV
, fog
, WRITEMASK_X
, input
);
1328 case FDM_EYE_PLANE_ABS
: /* Z = abs(Ze) */
1329 input
= get_eye_position_z(p
);
1330 emit_op1(p
, OPCODE_ABS
, fog
, WRITEMASK_X
, input
);
1332 default: assert(0); break; /* can't happen */
1337 input
= swizzle1(register_input(p
, VERT_ATTRIB_FOG
), X
);
1338 emit_op1(p
, OPCODE_ABS
, fog
, WRITEMASK_X
, input
);
1341 emit_op1(p
, OPCODE_MOV
, fog
, WRITEMASK_YZW
, get_identity_param(p
));
1345 static void build_reflect_texgen( struct tnl_program
*p
,
1349 struct ureg normal
= get_transformed_normal(p
);
1350 struct ureg eye_hat
= get_eye_position_normalized(p
);
1351 struct ureg tmp
= get_temp(p
);
1354 emit_op2(p
, OPCODE_DP3
, tmp
, 0, normal
, eye_hat
);
1356 emit_op2(p
, OPCODE_ADD
, tmp
, 0, tmp
, tmp
);
1358 emit_op3(p
, OPCODE_MAD
, dest
, writemask
, negate(tmp
), normal
, eye_hat
);
1360 release_temp(p
, tmp
);
1364 static void build_sphere_texgen( struct tnl_program
*p
,
1368 struct ureg normal
= get_transformed_normal(p
);
1369 struct ureg eye_hat
= get_eye_position_normalized(p
);
1370 struct ureg tmp
= get_temp(p
);
1371 struct ureg half
= register_scalar_const(p
, .5);
1372 struct ureg r
= get_temp(p
);
1373 struct ureg inv_m
= get_temp(p
);
1374 struct ureg id
= get_identity_param(p
);
1376 /* Could share the above calculations, but it would be
1377 * a fairly odd state for someone to set (both sphere and
1378 * reflection active for different texture coordinate
1379 * components. Of course - if two texture units enable
1380 * reflect and/or sphere, things start to tilt in favour
1381 * of seperating this out:
1385 emit_op2(p
, OPCODE_DP3
, tmp
, 0, normal
, eye_hat
);
1387 emit_op2(p
, OPCODE_ADD
, tmp
, 0, tmp
, tmp
);
1389 emit_op3(p
, OPCODE_MAD
, r
, 0, negate(tmp
), normal
, eye_hat
);
1391 emit_op2(p
, OPCODE_ADD
, tmp
, 0, r
, swizzle(id
,X
,Y
,W
,Z
));
1392 /* rx^2 + ry^2 + (rz+1)^2 */
1393 emit_op2(p
, OPCODE_DP3
, tmp
, 0, tmp
, tmp
);
1395 emit_op1(p
, OPCODE_RSQ
, tmp
, 0, tmp
);
1397 emit_op2(p
, OPCODE_MUL
, inv_m
, 0, tmp
, half
);
1399 emit_op3(p
, OPCODE_MAD
, dest
, writemask
, r
, inv_m
, half
);
1401 release_temp(p
, tmp
);
1403 release_temp(p
, inv_m
);
1407 static void build_texture_transform( struct tnl_program
*p
)
1411 for (i
= 0; i
< MAX_TEXTURE_COORD_UNITS
; i
++) {
1413 if (!(p
->state
->fragprog_inputs_read
& FRAG_BIT_TEX(i
)))
1416 if (p
->state
->unit
[i
].coord_replace
)
1419 if (p
->state
->unit
[i
].texgen_enabled
||
1420 p
->state
->unit
[i
].texmat_enabled
) {
1422 GLuint texmat_enabled
= p
->state
->unit
[i
].texmat_enabled
;
1423 struct ureg out
= register_output(p
, VERT_RESULT_TEX0
+ i
);
1424 struct ureg out_texgen
= undef
;
1426 if (p
->state
->unit
[i
].texgen_enabled
) {
1427 GLuint copy_mask
= 0;
1428 GLuint sphere_mask
= 0;
1429 GLuint reflect_mask
= 0;
1430 GLuint normal_mask
= 0;
1434 out_texgen
= get_temp(p
);
1438 modes
[0] = p
->state
->unit
[i
].texgen_mode0
;
1439 modes
[1] = p
->state
->unit
[i
].texgen_mode1
;
1440 modes
[2] = p
->state
->unit
[i
].texgen_mode2
;
1441 modes
[3] = p
->state
->unit
[i
].texgen_mode3
;
1443 for (j
= 0; j
< 4; j
++) {
1445 case TXG_OBJ_LINEAR
: {
1446 struct ureg obj
= register_input(p
, VERT_ATTRIB_POS
);
1448 register_param3(p
, STATE_TEXGEN
, i
,
1449 STATE_TEXGEN_OBJECT_S
+ j
);
1451 emit_op2(p
, OPCODE_DP4
, out_texgen
, WRITEMASK_X
<< j
,
1455 case TXG_EYE_LINEAR
: {
1456 struct ureg eye
= get_eye_position(p
);
1458 register_param3(p
, STATE_TEXGEN
, i
,
1459 STATE_TEXGEN_EYE_S
+ j
);
1461 emit_op2(p
, OPCODE_DP4
, out_texgen
, WRITEMASK_X
<< j
,
1465 case TXG_SPHERE_MAP
:
1466 sphere_mask
|= WRITEMASK_X
<< j
;
1468 case TXG_REFLECTION_MAP
:
1469 reflect_mask
|= WRITEMASK_X
<< j
;
1471 case TXG_NORMAL_MAP
:
1472 normal_mask
|= WRITEMASK_X
<< j
;
1475 copy_mask
|= WRITEMASK_X
<< j
;
1480 build_sphere_texgen(p
, out_texgen
, sphere_mask
);
1484 build_reflect_texgen(p
, out_texgen
, reflect_mask
);
1488 struct ureg normal
= get_transformed_normal(p
);
1489 emit_op1(p
, OPCODE_MOV
, out_texgen
, normal_mask
, normal
);
1493 struct ureg in
= register_input(p
, VERT_ATTRIB_TEX0
+i
);
1494 emit_op1(p
, OPCODE_MOV
, out_texgen
, copy_mask
, in
);
1498 if (texmat_enabled
) {
1499 struct ureg texmat
[4];
1500 struct ureg in
= (!is_undef(out_texgen
) ?
1502 register_input(p
, VERT_ATTRIB_TEX0
+i
));
1503 if (p
->mvp_with_dp4
) {
1504 register_matrix_param5( p
, STATE_TEXTURE_MATRIX
, i
, 0, 3,
1506 emit_matrix_transform_vec4( p
, out
, texmat
, in
);
1509 register_matrix_param5( p
, STATE_TEXTURE_MATRIX
, i
, 0, 3,
1510 STATE_MATRIX_TRANSPOSE
, texmat
);
1511 emit_transpose_matrix_transform_vec4( p
, out
, texmat
, in
);
1518 emit_passthrough(p
, VERT_ATTRIB_TEX0
+i
, VERT_RESULT_TEX0
+i
);
1525 * Point size attenuation computation.
1527 static void build_atten_pointsize( struct tnl_program
*p
)
1529 struct ureg eye
= get_eye_position_z(p
);
1530 struct ureg state_size
= register_param2(p
, STATE_INTERNAL
, STATE_POINT_SIZE_CLAMPED
);
1531 struct ureg state_attenuation
= register_param1(p
, STATE_POINT_ATTENUATION
);
1532 struct ureg out
= register_output(p
, VERT_RESULT_PSIZ
);
1533 struct ureg ut
= get_temp(p
);
1536 emit_op1(p
, OPCODE_ABS
, ut
, WRITEMASK_Y
, swizzle1(eye
, Z
));
1537 /* p1 + dist * (p2 + dist * p3); */
1538 emit_op3(p
, OPCODE_MAD
, ut
, WRITEMASK_X
, swizzle1(ut
, Y
),
1539 swizzle1(state_attenuation
, Z
), swizzle1(state_attenuation
, Y
));
1540 emit_op3(p
, OPCODE_MAD
, ut
, WRITEMASK_X
, swizzle1(ut
, Y
),
1541 ut
, swizzle1(state_attenuation
, X
));
1543 /* 1 / sqrt(factor) */
1544 emit_op1(p
, OPCODE_RSQ
, ut
, WRITEMASK_X
, ut
);
1547 /* out = pointSize / sqrt(factor) */
1548 emit_op2(p
, OPCODE_MUL
, out
, WRITEMASK_X
, ut
, state_size
);
1550 /* this is a good place to clamp the point size since there's likely
1551 * no hardware registers to clamp point size at rasterization time.
1553 emit_op2(p
, OPCODE_MUL
, ut
, WRITEMASK_X
, ut
, state_size
);
1554 emit_op2(p
, OPCODE_MAX
, ut
, WRITEMASK_X
, ut
, swizzle1(state_size
, Y
));
1555 emit_op2(p
, OPCODE_MIN
, out
, WRITEMASK_X
, ut
, swizzle1(state_size
, Z
));
1558 release_temp(p
, ut
);
1563 * Pass-though per-vertex point size, from user's point size array.
1565 static void build_array_pointsize( struct tnl_program
*p
)
1567 struct ureg in
= register_input(p
, VERT_ATTRIB_POINT_SIZE
);
1568 struct ureg out
= register_output(p
, VERT_RESULT_PSIZ
);
1569 emit_op1(p
, OPCODE_MOV
, out
, WRITEMASK_X
, in
);
1573 static void build_tnl_program( struct tnl_program
*p
)
1575 /* Emit the program, starting with modelviewproject:
1579 /* Lighting calculations:
1581 if (p
->state
->fragprog_inputs_read
& (FRAG_BIT_COL0
|FRAG_BIT_COL1
)) {
1582 if (p
->state
->light_global_enabled
)
1585 if (p
->state
->fragprog_inputs_read
& FRAG_BIT_COL0
)
1586 emit_passthrough(p
, VERT_ATTRIB_COLOR0
, VERT_RESULT_COL0
);
1588 if (p
->state
->fragprog_inputs_read
& FRAG_BIT_COL1
)
1589 emit_passthrough(p
, VERT_ATTRIB_COLOR1
, VERT_RESULT_COL1
);
1593 if (p
->state
->fragprog_inputs_read
& FRAG_BIT_FOGC
)
1596 if (p
->state
->fragprog_inputs_read
& FRAG_BITS_TEX_ANY
)
1597 build_texture_transform(p
);
1599 if (p
->state
->point_attenuated
)
1600 build_atten_pointsize(p
);
1601 else if (p
->state
->point_array
)
1602 build_array_pointsize(p
);
1606 emit_op1(p
, OPCODE_END
, undef
, 0, undef
);
1617 create_new_program( const struct state_key
*key
,
1618 struct gl_vertex_program
*program
,
1619 GLboolean mvp_with_dp4
,
1622 struct tnl_program p
;
1624 memset(&p
, 0, sizeof(p
));
1626 p
.program
= program
;
1627 p
.eye_position
= undef
;
1628 p
.eye_position_z
= undef
;
1629 p
.eye_position_normalized
= undef
;
1630 p
.transformed_normal
= undef
;
1633 p
.mvp_with_dp4
= mvp_with_dp4
;
1635 if (max_temps
>= sizeof(int) * 8)
1636 p
.temp_reserved
= 0;
1638 p
.temp_reserved
= ~((1<<max_temps
)-1);
1640 /* Start by allocating 32 instructions.
1641 * If we need more, we'll grow the instruction array as needed.
1644 p
.program
->Base
.Instructions
= _mesa_alloc_instructions(p
.max_inst
);
1645 p
.program
->Base
.String
= NULL
;
1646 p
.program
->Base
.NumInstructions
=
1647 p
.program
->Base
.NumTemporaries
=
1648 p
.program
->Base
.NumParameters
=
1649 p
.program
->Base
.NumAttributes
= p
.program
->Base
.NumAddressRegs
= 0;
1650 p
.program
->Base
.Parameters
= _mesa_new_parameter_list();
1651 p
.program
->Base
.InputsRead
= 0;
1652 p
.program
->Base
.OutputsWritten
= 0;
1654 build_tnl_program( &p
);
1659 * Return a vertex program which implements the current fixed-function
1660 * transform/lighting/texgen operations.
1661 * XXX move this into core mesa (main/)
1663 struct gl_vertex_program
*
1664 _mesa_get_fixed_func_vertex_program(struct gl_context
*ctx
)
1666 struct gl_vertex_program
*prog
;
1667 struct state_key key
;
1669 /* Grab all the relevent state and put it in a single structure:
1671 make_state_key(ctx
, &key
);
1673 /* Look for an already-prepared program for this state:
1675 prog
= (struct gl_vertex_program
*)
1676 _mesa_search_program_cache(ctx
->VertexProgram
.Cache
, &key
, sizeof(key
));
1679 /* OK, we'll have to build a new one */
1681 printf("Build new TNL program\n");
1683 prog
= (struct gl_vertex_program
*)
1684 ctx
->Driver
.NewProgram(ctx
, GL_VERTEX_PROGRAM_ARB
, 0);
1688 create_new_program( &key
, prog
,
1690 ctx
->Const
.VertexProgram
.MaxTemps
);
1693 if (ctx
->Driver
.ProgramStringNotify
)
1694 ctx
->Driver
.ProgramStringNotify( ctx
, GL_VERTEX_PROGRAM_ARB
,
1697 _mesa_program_cache_insert(ctx
, ctx
->VertexProgram
.Cache
,
1698 &key
, sizeof(key
), &prog
->Base
);