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 /* Make sure fp->Base.InputsRead fits in a 12-bit field */
164 assert(fp
->Base
.InputsRead
< (1 << 12));
165 key
->fragprog_inputs_read
= fp
->Base
.InputsRead
;
166 key
->varying_vp_inputs
= ctx
->varying_vp_inputs
;
168 if (ctx
->RenderMode
== GL_FEEDBACK
) {
169 /* make sure the vertprog emits color and tex0 */
170 key
->fragprog_inputs_read
|= (FRAG_BIT_COL0
| FRAG_BIT_TEX0
);
173 key
->separate_specular
= (ctx
->Light
.Model
.ColorControl
==
174 GL_SEPARATE_SPECULAR_COLOR
);
176 if (ctx
->Light
.Enabled
) {
177 key
->light_global_enabled
= 1;
179 if (ctx
->Light
.Model
.LocalViewer
)
180 key
->light_local_viewer
= 1;
182 if (ctx
->Light
.Model
.TwoSide
)
183 key
->light_twoside
= 1;
185 if (ctx
->Light
.ColorMaterialEnabled
) {
186 key
->light_color_material_mask
= ctx
->Light
._ColorMaterialBitmask
;
189 for (i
= 0; i
< MAX_LIGHTS
; i
++) {
190 struct gl_light
*light
= &ctx
->Light
.Light
[i
];
192 if (light
->Enabled
) {
193 key
->unit
[i
].light_enabled
= 1;
195 if (light
->EyePosition
[3] == 0.0)
196 key
->unit
[i
].light_eyepos3_is_zero
= 1;
198 if (light
->SpotCutoff
== 180.0)
199 key
->unit
[i
].light_spotcutoff_is_180
= 1;
201 if (light
->ConstantAttenuation
!= 1.0 ||
202 light
->LinearAttenuation
!= 0.0 ||
203 light
->QuadraticAttenuation
!= 0.0)
204 key
->unit
[i
].light_attenuated
= 1;
208 if (check_active_shininess(ctx
, key
, 0)) {
209 key
->material_shininess_is_zero
= 0;
211 else if (key
->light_twoside
&&
212 check_active_shininess(ctx
, key
, 1)) {
213 key
->material_shininess_is_zero
= 0;
216 key
->material_shininess_is_zero
= 1;
220 if (ctx
->Transform
.Normalize
)
223 if (ctx
->Transform
.RescaleNormals
)
224 key
->rescale_normals
= 1;
226 if (ctx
->Fog
.FogCoordinateSource
== GL_FRAGMENT_DEPTH_EXT
) {
227 key
->fog_source_is_depth
= 1;
228 key
->fog_distance_mode
= translate_fog_distance_mode(ctx
->Fog
.FogDistanceMode
);
231 if (ctx
->Point
._Attenuated
)
232 key
->point_attenuated
= 1;
234 if (ctx
->Array
.ArrayObj
->VertexAttrib
[VERT_ATTRIB_POINT_SIZE
].Enabled
)
235 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
;
549 /* Check that bitfield sizes aren't exceeded */
550 ASSERT(dst
->Index
== reg
.idx
);
554 static void debug_insn( struct prog_instruction
*inst
, const char *fn
,
558 static const char *last_fn
;
565 printf("%d:\t", line
);
566 _mesa_print_instruction(inst
);
571 static void emit_op3fn(struct tnl_program
*p
,
582 struct prog_instruction
*inst
;
584 assert((GLint
) p
->program
->Base
.NumInstructions
<= p
->max_inst
);
586 if (p
->program
->Base
.NumInstructions
== p
->max_inst
) {
587 /* need to extend the program's instruction array */
588 struct prog_instruction
*newInst
;
590 /* double the size */
593 newInst
= _mesa_alloc_instructions(p
->max_inst
);
595 _mesa_error(NULL
, GL_OUT_OF_MEMORY
, "vertex program build");
599 _mesa_copy_instructions(newInst
,
600 p
->program
->Base
.Instructions
,
601 p
->program
->Base
.NumInstructions
);
603 _mesa_free_instructions(p
->program
->Base
.Instructions
,
604 p
->program
->Base
.NumInstructions
);
606 p
->program
->Base
.Instructions
= newInst
;
609 nr
= p
->program
->Base
.NumInstructions
++;
611 inst
= &p
->program
->Base
.Instructions
[nr
];
612 inst
->Opcode
= (enum prog_opcode
) op
;
615 emit_arg( &inst
->SrcReg
[0], src0
);
616 emit_arg( &inst
->SrcReg
[1], src1
);
617 emit_arg( &inst
->SrcReg
[2], src2
);
619 emit_dst( &inst
->DstReg
, dest
, mask
);
621 debug_insn(inst
, fn
, line
);
625 #define emit_op3(p, op, dst, mask, src0, src1, src2) \
626 emit_op3fn(p, op, dst, mask, src0, src1, src2, __FUNCTION__, __LINE__)
628 #define emit_op2(p, op, dst, mask, src0, src1) \
629 emit_op3fn(p, op, dst, mask, src0, src1, undef, __FUNCTION__, __LINE__)
631 #define emit_op1(p, op, dst, mask, src0) \
632 emit_op3fn(p, op, dst, mask, src0, undef, undef, __FUNCTION__, __LINE__)
635 static struct ureg
make_temp( struct tnl_program
*p
, struct ureg reg
)
637 if (reg
.file
== PROGRAM_TEMPORARY
&&
638 !(p
->temp_reserved
& (1<<reg
.idx
)))
641 struct ureg temp
= get_temp(p
);
642 emit_op1(p
, OPCODE_MOV
, temp
, 0, reg
);
648 /* Currently no tracking performed of input/output/register size or
649 * active elements. Could be used to reduce these operations, as
650 * could the matrix type.
652 static void emit_matrix_transform_vec4( struct tnl_program
*p
,
654 const struct ureg
*mat
,
657 emit_op2(p
, OPCODE_DP4
, dest
, WRITEMASK_X
, src
, mat
[0]);
658 emit_op2(p
, OPCODE_DP4
, dest
, WRITEMASK_Y
, src
, mat
[1]);
659 emit_op2(p
, OPCODE_DP4
, dest
, WRITEMASK_Z
, src
, mat
[2]);
660 emit_op2(p
, OPCODE_DP4
, dest
, WRITEMASK_W
, src
, mat
[3]);
664 /* This version is much easier to implement if writemasks are not
665 * supported natively on the target or (like SSE), the target doesn't
666 * have a clean/obvious dotproduct implementation.
668 static void emit_transpose_matrix_transform_vec4( struct tnl_program
*p
,
670 const struct ureg
*mat
,
675 if (dest
.file
!= PROGRAM_TEMPORARY
)
680 emit_op2(p
, OPCODE_MUL
, tmp
, 0, swizzle1(src
,X
), mat
[0]);
681 emit_op3(p
, OPCODE_MAD
, tmp
, 0, swizzle1(src
,Y
), mat
[1], tmp
);
682 emit_op3(p
, OPCODE_MAD
, tmp
, 0, swizzle1(src
,Z
), mat
[2], tmp
);
683 emit_op3(p
, OPCODE_MAD
, dest
, 0, swizzle1(src
,W
), mat
[3], tmp
);
685 if (dest
.file
!= PROGRAM_TEMPORARY
)
686 release_temp(p
, tmp
);
690 static void emit_matrix_transform_vec3( struct tnl_program
*p
,
692 const struct ureg
*mat
,
695 emit_op2(p
, OPCODE_DP3
, dest
, WRITEMASK_X
, src
, mat
[0]);
696 emit_op2(p
, OPCODE_DP3
, dest
, WRITEMASK_Y
, src
, mat
[1]);
697 emit_op2(p
, OPCODE_DP3
, dest
, WRITEMASK_Z
, src
, mat
[2]);
701 static void emit_normalize_vec3( struct tnl_program
*p
,
706 /* XXX use this when drivers are ready for NRM3 */
707 emit_op1(p
, OPCODE_NRM3
, dest
, WRITEMASK_XYZ
, src
);
709 struct ureg tmp
= get_temp(p
);
710 emit_op2(p
, OPCODE_DP3
, tmp
, WRITEMASK_X
, src
, src
);
711 emit_op1(p
, OPCODE_RSQ
, tmp
, WRITEMASK_X
, tmp
);
712 emit_op2(p
, OPCODE_MUL
, dest
, 0, src
, swizzle1(tmp
, X
));
713 release_temp(p
, tmp
);
718 static void emit_passthrough( struct tnl_program
*p
,
722 struct ureg out
= register_output(p
, output
);
723 emit_op1(p
, OPCODE_MOV
, out
, 0, register_input(p
, input
));
727 static struct ureg
get_eye_position( struct tnl_program
*p
)
729 if (is_undef(p
->eye_position
)) {
730 struct ureg pos
= register_input( p
, VERT_ATTRIB_POS
);
731 struct ureg modelview
[4];
733 p
->eye_position
= reserve_temp(p
);
735 if (p
->mvp_with_dp4
) {
736 register_matrix_param5( p
, STATE_MODELVIEW_MATRIX
, 0, 0, 3,
739 emit_matrix_transform_vec4(p
, p
->eye_position
, modelview
, pos
);
742 register_matrix_param5( p
, STATE_MODELVIEW_MATRIX
, 0, 0, 3,
743 STATE_MATRIX_TRANSPOSE
, modelview
);
745 emit_transpose_matrix_transform_vec4(p
, p
->eye_position
, modelview
, pos
);
749 return p
->eye_position
;
753 static struct ureg
get_eye_position_z( struct tnl_program
*p
)
755 if (!is_undef(p
->eye_position
))
756 return swizzle1(p
->eye_position
, Z
);
758 if (is_undef(p
->eye_position_z
)) {
759 struct ureg pos
= register_input( p
, VERT_ATTRIB_POS
);
760 struct ureg modelview
[4];
762 p
->eye_position_z
= reserve_temp(p
);
764 register_matrix_param5( p
, STATE_MODELVIEW_MATRIX
, 0, 0, 3,
767 emit_op2(p
, OPCODE_DP4
, p
->eye_position_z
, 0, pos
, modelview
[2]);
770 return p
->eye_position_z
;
774 static struct ureg
get_eye_position_normalized( struct tnl_program
*p
)
776 if (is_undef(p
->eye_position_normalized
)) {
777 struct ureg eye
= get_eye_position(p
);
778 p
->eye_position_normalized
= reserve_temp(p
);
779 emit_normalize_vec3(p
, p
->eye_position_normalized
, eye
);
782 return p
->eye_position_normalized
;
786 static struct ureg
get_transformed_normal( struct tnl_program
*p
)
788 if (is_undef(p
->transformed_normal
) &&
789 !p
->state
->need_eye_coords
&&
790 !p
->state
->normalize
&&
791 !(p
->state
->need_eye_coords
== p
->state
->rescale_normals
))
793 p
->transformed_normal
= register_input(p
, VERT_ATTRIB_NORMAL
);
795 else if (is_undef(p
->transformed_normal
))
797 struct ureg normal
= register_input(p
, VERT_ATTRIB_NORMAL
);
798 struct ureg mvinv
[3];
799 struct ureg transformed_normal
= reserve_temp(p
);
801 if (p
->state
->need_eye_coords
) {
802 register_matrix_param5( p
, STATE_MODELVIEW_MATRIX
, 0, 0, 2,
803 STATE_MATRIX_INVTRANS
, mvinv
);
805 /* Transform to eye space:
807 emit_matrix_transform_vec3( p
, transformed_normal
, mvinv
, normal
);
808 normal
= transformed_normal
;
811 /* Normalize/Rescale:
813 if (p
->state
->normalize
) {
814 emit_normalize_vec3( p
, transformed_normal
, normal
);
815 normal
= transformed_normal
;
817 else if (p
->state
->need_eye_coords
== p
->state
->rescale_normals
) {
818 /* This is already adjusted for eye/non-eye rendering:
820 struct ureg rescale
= register_param2(p
, STATE_INTERNAL
,
823 emit_op2( p
, OPCODE_MUL
, transformed_normal
, 0, normal
, rescale
);
824 normal
= transformed_normal
;
827 assert(normal
.file
== PROGRAM_TEMPORARY
);
828 p
->transformed_normal
= normal
;
831 return p
->transformed_normal
;
835 static void build_hpos( struct tnl_program
*p
)
837 struct ureg pos
= register_input( p
, VERT_ATTRIB_POS
);
838 struct ureg hpos
= register_output( p
, VERT_RESULT_HPOS
);
841 if (p
->mvp_with_dp4
) {
842 register_matrix_param5( p
, STATE_MVP_MATRIX
, 0, 0, 3,
844 emit_matrix_transform_vec4( p
, hpos
, mvp
, pos
);
847 register_matrix_param5( p
, STATE_MVP_MATRIX
, 0, 0, 3,
848 STATE_MATRIX_TRANSPOSE
, mvp
);
849 emit_transpose_matrix_transform_vec4( p
, hpos
, mvp
, pos
);
854 static GLuint
material_attrib( GLuint side
, GLuint property
)
856 return (property
- STATE_AMBIENT
) * 2 + side
;
861 * Get a bitmask of which material values vary on a per-vertex basis.
863 static void set_material_flags( struct tnl_program
*p
)
865 p
->color_materials
= 0;
868 if (p
->state
->varying_vp_inputs
& VERT_BIT_COLOR0
) {
870 p
->color_materials
= p
->state
->light_color_material_mask
;
873 p
->materials
|= (p
->state
->varying_vp_inputs
>> VERT_ATTRIB_GENERIC0
);
877 static struct ureg
get_material( struct tnl_program
*p
, GLuint side
,
880 GLuint attrib
= material_attrib(side
, property
);
882 if (p
->color_materials
& (1<<attrib
))
883 return register_input(p
, VERT_ATTRIB_COLOR0
);
884 else if (p
->materials
& (1<<attrib
)) {
885 /* Put material values in the GENERIC slots -- they are not used
886 * for anything in fixed function mode.
888 return register_input( p
, attrib
+ VERT_ATTRIB_GENERIC0
);
891 return register_param3( p
, STATE_MATERIAL
, side
, property
);
894 #define SCENE_COLOR_BITS(side) (( MAT_BIT_FRONT_EMISSION | \
895 MAT_BIT_FRONT_AMBIENT | \
896 MAT_BIT_FRONT_DIFFUSE) << (side))
900 * Either return a precalculated constant value or emit code to
901 * calculate these values dynamically in the case where material calls
902 * are present between begin/end pairs.
904 * Probably want to shift this to the program compilation phase - if
905 * we always emitted the calculation here, a smart compiler could
906 * detect that it was constant (given a certain set of inputs), and
907 * lift it out of the main loop. That way the programs created here
908 * would be independent of the vertex_buffer details.
910 static struct ureg
get_scenecolor( struct tnl_program
*p
, GLuint side
)
912 if (p
->materials
& SCENE_COLOR_BITS(side
)) {
913 struct ureg lm_ambient
= register_param1(p
, STATE_LIGHTMODEL_AMBIENT
);
914 struct ureg material_emission
= get_material(p
, side
, STATE_EMISSION
);
915 struct ureg material_ambient
= get_material(p
, side
, STATE_AMBIENT
);
916 struct ureg material_diffuse
= get_material(p
, side
, STATE_DIFFUSE
);
917 struct ureg tmp
= make_temp(p
, material_diffuse
);
918 emit_op3(p
, OPCODE_MAD
, tmp
, WRITEMASK_XYZ
, lm_ambient
,
919 material_ambient
, material_emission
);
923 return register_param2( p
, STATE_LIGHTMODEL_SCENECOLOR
, side
);
927 static struct ureg
get_lightprod( struct tnl_program
*p
, GLuint light
,
928 GLuint side
, GLuint property
)
930 GLuint attrib
= material_attrib(side
, property
);
931 if (p
->materials
& (1<<attrib
)) {
932 struct ureg light_value
=
933 register_param3(p
, STATE_LIGHT
, light
, property
);
934 struct ureg material_value
= get_material(p
, side
, property
);
935 struct ureg tmp
= get_temp(p
);
936 emit_op2(p
, OPCODE_MUL
, tmp
, 0, light_value
, material_value
);
940 return register_param4(p
, STATE_LIGHTPROD
, light
, side
, property
);
944 static struct ureg
calculate_light_attenuation( struct tnl_program
*p
,
949 struct ureg attenuation
= register_param3(p
, STATE_LIGHT
, i
,
951 struct ureg att
= undef
;
953 /* Calculate spot attenuation:
955 if (!p
->state
->unit
[i
].light_spotcutoff_is_180
) {
956 struct ureg spot_dir_norm
= register_param3(p
, STATE_INTERNAL
,
957 STATE_LIGHT_SPOT_DIR_NORMALIZED
, i
);
958 struct ureg spot
= get_temp(p
);
959 struct ureg slt
= get_temp(p
);
963 emit_op2(p
, OPCODE_DP3
, spot
, 0, negate(VPpli
), spot_dir_norm
);
964 emit_op2(p
, OPCODE_SLT
, slt
, 0, swizzle1(spot_dir_norm
,W
), spot
);
965 emit_op2(p
, OPCODE_POW
, spot
, 0, spot
, swizzle1(attenuation
, W
));
966 emit_op2(p
, OPCODE_MUL
, att
, 0, slt
, spot
);
968 release_temp(p
, spot
);
969 release_temp(p
, slt
);
972 /* Calculate distance attenuation(See formula (2.4) at glspec 2.1 page 62):
974 * Skip the calucation when _dist_ is undefined(light_eyepos3_is_zero)
976 if (p
->state
->unit
[i
].light_attenuated
&& !is_undef(dist
)) {
980 emit_op1(p
, OPCODE_RCP
, dist
, WRITEMASK_YZ
, dist
);
982 emit_op2(p
, OPCODE_MUL
, dist
, WRITEMASK_XZ
, dist
, swizzle1(dist
,Y
));
984 emit_op2(p
, OPCODE_DP3
, dist
, 0, attenuation
, dist
);
986 if (!p
->state
->unit
[i
].light_spotcutoff_is_180
) {
988 emit_op1(p
, OPCODE_RCP
, dist
, 0, dist
);
989 /* spot-atten * dist-atten */
990 emit_op2(p
, OPCODE_MUL
, att
, 0, dist
, att
);
994 emit_op1(p
, OPCODE_RCP
, att
, 0, dist
);
1004 * lit.y = MAX(0, dots.x)
1005 * lit.z = SLT(0, dots.x)
1007 static void emit_degenerate_lit( struct tnl_program
*p
,
1011 struct ureg id
= get_identity_param(p
); /* id = {0,0,0,1} */
1013 /* Note that lit.x & lit.w will not be examined. Note also that
1014 * dots.xyzw == dots.xxxx.
1017 /* MAX lit, id, dots;
1019 emit_op2(p
, OPCODE_MAX
, lit
, WRITEMASK_XYZW
, id
, dots
);
1021 /* result[2] = (in > 0 ? 1 : 0)
1022 * SLT lit.z, id.z, dots; # lit.z = (0 < dots.z) ? 1 : 0
1024 emit_op2(p
, OPCODE_SLT
, lit
, WRITEMASK_Z
, swizzle1(id
,Z
), dots
);
1028 /* Need to add some addtional parameters to allow lighting in object
1029 * space - STATE_SPOT_DIRECTION and STATE_HALF_VECTOR implicitly assume eye
1032 static void build_lighting( struct tnl_program
*p
)
1034 const GLboolean twoside
= p
->state
->light_twoside
;
1035 const GLboolean separate
= p
->state
->separate_specular
;
1036 GLuint nr_lights
= 0, count
= 0;
1037 struct ureg normal
= get_transformed_normal(p
);
1038 struct ureg lit
= get_temp(p
);
1039 struct ureg dots
= get_temp(p
);
1040 struct ureg _col0
= undef
, _col1
= undef
;
1041 struct ureg _bfc0
= undef
, _bfc1
= undef
;
1046 * dots.x = dot(normal, VPpli)
1047 * dots.y = dot(normal, halfAngle)
1048 * dots.z = back.shininess
1049 * dots.w = front.shininess
1052 for (i
= 0; i
< MAX_LIGHTS
; i
++)
1053 if (p
->state
->unit
[i
].light_enabled
)
1056 set_material_flags(p
);
1059 if (!p
->state
->material_shininess_is_zero
) {
1060 struct ureg shininess
= get_material(p
, 0, STATE_SHININESS
);
1061 emit_op1(p
, OPCODE_MOV
, dots
, WRITEMASK_W
, swizzle1(shininess
,X
));
1062 release_temp(p
, shininess
);
1065 _col0
= make_temp(p
, get_scenecolor(p
, 0));
1067 _col1
= make_temp(p
, get_identity_param(p
));
1073 if (!p
->state
->material_shininess_is_zero
) {
1074 /* Note that we negate the back-face specular exponent here.
1075 * The negation will be un-done later in the back-face code below.
1077 struct ureg shininess
= get_material(p
, 1, STATE_SHININESS
);
1078 emit_op1(p
, OPCODE_MOV
, dots
, WRITEMASK_Z
,
1079 negate(swizzle1(shininess
,X
)));
1080 release_temp(p
, shininess
);
1083 _bfc0
= make_temp(p
, get_scenecolor(p
, 1));
1085 _bfc1
= make_temp(p
, get_identity_param(p
));
1090 /* If no lights, still need to emit the scenecolor.
1093 struct ureg res0
= register_output( p
, VERT_RESULT_COL0
);
1094 emit_op1(p
, OPCODE_MOV
, res0
, 0, _col0
);
1098 struct ureg res1
= register_output( p
, VERT_RESULT_COL1
);
1099 emit_op1(p
, OPCODE_MOV
, res1
, 0, _col1
);
1103 struct ureg res0
= register_output( p
, VERT_RESULT_BFC0
);
1104 emit_op1(p
, OPCODE_MOV
, res0
, 0, _bfc0
);
1107 if (twoside
&& separate
) {
1108 struct ureg res1
= register_output( p
, VERT_RESULT_BFC1
);
1109 emit_op1(p
, OPCODE_MOV
, res1
, 0, _bfc1
);
1112 if (nr_lights
== 0) {
1117 for (i
= 0; i
< MAX_LIGHTS
; i
++) {
1118 if (p
->state
->unit
[i
].light_enabled
) {
1119 struct ureg half
= undef
;
1120 struct ureg att
= undef
, VPpli
= undef
;
1121 struct ureg dist
= undef
;
1124 if (p
->state
->unit
[i
].light_eyepos3_is_zero
) {
1125 VPpli
= register_param3(p
, STATE_INTERNAL
,
1126 STATE_LIGHT_POSITION_NORMALIZED
, i
);
1128 struct ureg Ppli
= register_param3(p
, STATE_INTERNAL
,
1129 STATE_LIGHT_POSITION
, i
);
1130 struct ureg V
= get_eye_position(p
);
1132 VPpli
= get_temp(p
);
1135 /* Calculate VPpli vector
1137 emit_op2(p
, OPCODE_SUB
, VPpli
, 0, Ppli
, V
);
1139 /* Normalize VPpli. The dist value also used in
1140 * attenuation below.
1142 emit_op2(p
, OPCODE_DP3
, dist
, 0, VPpli
, VPpli
);
1143 emit_op1(p
, OPCODE_RSQ
, dist
, 0, dist
);
1144 emit_op2(p
, OPCODE_MUL
, VPpli
, 0, VPpli
, dist
);
1147 /* Calculate attenuation:
1149 att
= calculate_light_attenuation(p
, i
, VPpli
, dist
);
1150 release_temp(p
, dist
);
1152 /* Calculate viewer direction, or use infinite viewer:
1154 if (!p
->state
->material_shininess_is_zero
) {
1155 if (p
->state
->light_local_viewer
) {
1156 struct ureg eye_hat
= get_eye_position_normalized(p
);
1158 emit_op2(p
, OPCODE_SUB
, half
, 0, VPpli
, eye_hat
);
1159 emit_normalize_vec3(p
, half
, half
);
1160 } else if (p
->state
->unit
[i
].light_eyepos3_is_zero
) {
1161 half
= register_param3(p
, STATE_INTERNAL
,
1162 STATE_LIGHT_HALF_VECTOR
, i
);
1164 struct ureg z_dir
= swizzle(get_identity_param(p
),X
,Y
,W
,Z
);
1166 emit_op2(p
, OPCODE_ADD
, half
, 0, VPpli
, z_dir
);
1167 emit_normalize_vec3(p
, half
, half
);
1171 /* Calculate dot products:
1173 if (p
->state
->material_shininess_is_zero
) {
1174 emit_op2(p
, OPCODE_DP3
, dots
, 0, normal
, VPpli
);
1177 emit_op2(p
, OPCODE_DP3
, dots
, WRITEMASK_X
, normal
, VPpli
);
1178 emit_op2(p
, OPCODE_DP3
, dots
, WRITEMASK_Y
, normal
, half
);
1181 /* Front face lighting:
1184 struct ureg ambient
= get_lightprod(p
, i
, 0, STATE_AMBIENT
);
1185 struct ureg diffuse
= get_lightprod(p
, i
, 0, STATE_DIFFUSE
);
1186 struct ureg specular
= get_lightprod(p
, i
, 0, STATE_SPECULAR
);
1187 struct ureg res0
, res1
;
1188 GLuint mask0
, mask1
;
1190 if (count
== nr_lights
) {
1192 mask0
= WRITEMASK_XYZ
;
1193 mask1
= WRITEMASK_XYZ
;
1194 res0
= register_output( p
, VERT_RESULT_COL0
);
1195 res1
= register_output( p
, VERT_RESULT_COL1
);
1199 mask1
= WRITEMASK_XYZ
;
1201 res1
= register_output( p
, VERT_RESULT_COL0
);
1211 if (!is_undef(att
)) {
1212 /* light is attenuated by distance */
1213 emit_op1(p
, OPCODE_LIT
, lit
, 0, dots
);
1214 emit_op2(p
, OPCODE_MUL
, lit
, 0, lit
, att
);
1215 emit_op3(p
, OPCODE_MAD
, _col0
, 0, swizzle1(lit
,X
), ambient
, _col0
);
1217 else if (!p
->state
->material_shininess_is_zero
) {
1218 /* there's a non-zero specular term */
1219 emit_op1(p
, OPCODE_LIT
, lit
, 0, dots
);
1220 emit_op2(p
, OPCODE_ADD
, _col0
, 0, ambient
, _col0
);
1223 /* no attenutation, no specular */
1224 emit_degenerate_lit(p
, lit
, dots
);
1225 emit_op2(p
, OPCODE_ADD
, _col0
, 0, ambient
, _col0
);
1228 emit_op3(p
, OPCODE_MAD
, res0
, mask0
, swizzle1(lit
,Y
), diffuse
, _col0
);
1229 emit_op3(p
, OPCODE_MAD
, res1
, mask1
, swizzle1(lit
,Z
), specular
, _col1
);
1231 release_temp(p
, ambient
);
1232 release_temp(p
, diffuse
);
1233 release_temp(p
, specular
);
1236 /* Back face lighting:
1239 struct ureg ambient
= get_lightprod(p
, i
, 1, STATE_AMBIENT
);
1240 struct ureg diffuse
= get_lightprod(p
, i
, 1, STATE_DIFFUSE
);
1241 struct ureg specular
= get_lightprod(p
, i
, 1, STATE_SPECULAR
);
1242 struct ureg res0
, res1
;
1243 GLuint mask0
, mask1
;
1245 if (count
== nr_lights
) {
1247 mask0
= WRITEMASK_XYZ
;
1248 mask1
= WRITEMASK_XYZ
;
1249 res0
= register_output( p
, VERT_RESULT_BFC0
);
1250 res1
= register_output( p
, VERT_RESULT_BFC1
);
1254 mask1
= WRITEMASK_XYZ
;
1256 res1
= register_output( p
, VERT_RESULT_BFC0
);
1266 /* For the back face we need to negate the X and Y component
1267 * dot products. dots.Z has the negated back-face specular
1268 * exponent. We swizzle that into the W position. This
1269 * negation makes the back-face specular term positive again.
1271 dots
= negate(swizzle(dots
,X
,Y
,W
,Z
));
1273 if (!is_undef(att
)) {
1274 emit_op1(p
, OPCODE_LIT
, lit
, 0, dots
);
1275 emit_op2(p
, OPCODE_MUL
, lit
, 0, lit
, att
);
1276 emit_op3(p
, OPCODE_MAD
, _bfc0
, 0, swizzle1(lit
,X
), ambient
, _bfc0
);
1278 else if (!p
->state
->material_shininess_is_zero
) {
1279 emit_op1(p
, OPCODE_LIT
, lit
, 0, dots
);
1280 emit_op2(p
, OPCODE_ADD
, _bfc0
, 0, ambient
, _bfc0
); /**/
1283 emit_degenerate_lit(p
, lit
, dots
);
1284 emit_op2(p
, OPCODE_ADD
, _bfc0
, 0, ambient
, _bfc0
);
1287 emit_op3(p
, OPCODE_MAD
, res0
, mask0
, swizzle1(lit
,Y
), diffuse
, _bfc0
);
1288 emit_op3(p
, OPCODE_MAD
, res1
, mask1
, swizzle1(lit
,Z
), specular
, _bfc1
);
1289 /* restore dots to its original state for subsequent lights
1290 * by negating and swizzling again.
1292 dots
= negate(swizzle(dots
,X
,Y
,W
,Z
));
1294 release_temp(p
, ambient
);
1295 release_temp(p
, diffuse
);
1296 release_temp(p
, specular
);
1299 release_temp(p
, half
);
1300 release_temp(p
, VPpli
);
1301 release_temp(p
, att
);
1309 static void build_fog( struct tnl_program
*p
)
1311 struct ureg fog
= register_output(p
, VERT_RESULT_FOGC
);
1314 if (p
->state
->fog_source_is_depth
) {
1316 switch (p
->state
->fog_distance_mode
) {
1317 case FDM_EYE_RADIAL
: /* Z = sqrt(Xe*Xe + Ye*Ye + Ze*Ze) */
1318 input
= get_eye_position(p
);
1319 emit_op2(p
, OPCODE_DP3
, fog
, WRITEMASK_X
, input
, input
);
1320 emit_op1(p
, OPCODE_RSQ
, fog
, WRITEMASK_X
, fog
);
1321 emit_op1(p
, OPCODE_RCP
, fog
, WRITEMASK_X
, fog
);
1323 case FDM_EYE_PLANE
: /* Z = Ze */
1324 input
= get_eye_position_z(p
);
1325 emit_op1(p
, OPCODE_MOV
, fog
, WRITEMASK_X
, input
);
1327 case FDM_EYE_PLANE_ABS
: /* Z = abs(Ze) */
1328 input
= get_eye_position_z(p
);
1329 emit_op1(p
, OPCODE_ABS
, fog
, WRITEMASK_X
, input
);
1331 default: assert(0); break; /* can't happen */
1336 input
= swizzle1(register_input(p
, VERT_ATTRIB_FOG
), X
);
1337 emit_op1(p
, OPCODE_ABS
, fog
, WRITEMASK_X
, input
);
1340 emit_op1(p
, OPCODE_MOV
, fog
, WRITEMASK_YZW
, get_identity_param(p
));
1344 static void build_reflect_texgen( struct tnl_program
*p
,
1348 struct ureg normal
= get_transformed_normal(p
);
1349 struct ureg eye_hat
= get_eye_position_normalized(p
);
1350 struct ureg tmp
= get_temp(p
);
1353 emit_op2(p
, OPCODE_DP3
, tmp
, 0, normal
, eye_hat
);
1355 emit_op2(p
, OPCODE_ADD
, tmp
, 0, tmp
, tmp
);
1357 emit_op3(p
, OPCODE_MAD
, dest
, writemask
, negate(tmp
), normal
, eye_hat
);
1359 release_temp(p
, tmp
);
1363 static void build_sphere_texgen( struct tnl_program
*p
,
1367 struct ureg normal
= get_transformed_normal(p
);
1368 struct ureg eye_hat
= get_eye_position_normalized(p
);
1369 struct ureg tmp
= get_temp(p
);
1370 struct ureg half
= register_scalar_const(p
, .5);
1371 struct ureg r
= get_temp(p
);
1372 struct ureg inv_m
= get_temp(p
);
1373 struct ureg id
= get_identity_param(p
);
1375 /* Could share the above calculations, but it would be
1376 * a fairly odd state for someone to set (both sphere and
1377 * reflection active for different texture coordinate
1378 * components. Of course - if two texture units enable
1379 * reflect and/or sphere, things start to tilt in favour
1380 * of seperating this out:
1384 emit_op2(p
, OPCODE_DP3
, tmp
, 0, normal
, eye_hat
);
1386 emit_op2(p
, OPCODE_ADD
, tmp
, 0, tmp
, tmp
);
1388 emit_op3(p
, OPCODE_MAD
, r
, 0, negate(tmp
), normal
, eye_hat
);
1390 emit_op2(p
, OPCODE_ADD
, tmp
, 0, r
, swizzle(id
,X
,Y
,W
,Z
));
1391 /* rx^2 + ry^2 + (rz+1)^2 */
1392 emit_op2(p
, OPCODE_DP3
, tmp
, 0, tmp
, tmp
);
1394 emit_op1(p
, OPCODE_RSQ
, tmp
, 0, tmp
);
1396 emit_op2(p
, OPCODE_MUL
, inv_m
, 0, tmp
, half
);
1398 emit_op3(p
, OPCODE_MAD
, dest
, writemask
, r
, inv_m
, half
);
1400 release_temp(p
, tmp
);
1402 release_temp(p
, inv_m
);
1406 static void build_texture_transform( struct tnl_program
*p
)
1410 for (i
= 0; i
< MAX_TEXTURE_COORD_UNITS
; i
++) {
1412 if (!(p
->state
->fragprog_inputs_read
& FRAG_BIT_TEX(i
)))
1415 if (p
->state
->unit
[i
].coord_replace
)
1418 if (p
->state
->unit
[i
].texgen_enabled
||
1419 p
->state
->unit
[i
].texmat_enabled
) {
1421 GLuint texmat_enabled
= p
->state
->unit
[i
].texmat_enabled
;
1422 struct ureg out
= register_output(p
, VERT_RESULT_TEX0
+ i
);
1423 struct ureg out_texgen
= undef
;
1425 if (p
->state
->unit
[i
].texgen_enabled
) {
1426 GLuint copy_mask
= 0;
1427 GLuint sphere_mask
= 0;
1428 GLuint reflect_mask
= 0;
1429 GLuint normal_mask
= 0;
1433 out_texgen
= get_temp(p
);
1437 modes
[0] = p
->state
->unit
[i
].texgen_mode0
;
1438 modes
[1] = p
->state
->unit
[i
].texgen_mode1
;
1439 modes
[2] = p
->state
->unit
[i
].texgen_mode2
;
1440 modes
[3] = p
->state
->unit
[i
].texgen_mode3
;
1442 for (j
= 0; j
< 4; j
++) {
1444 case TXG_OBJ_LINEAR
: {
1445 struct ureg obj
= register_input(p
, VERT_ATTRIB_POS
);
1447 register_param3(p
, STATE_TEXGEN
, i
,
1448 STATE_TEXGEN_OBJECT_S
+ j
);
1450 emit_op2(p
, OPCODE_DP4
, out_texgen
, WRITEMASK_X
<< j
,
1454 case TXG_EYE_LINEAR
: {
1455 struct ureg eye
= get_eye_position(p
);
1457 register_param3(p
, STATE_TEXGEN
, i
,
1458 STATE_TEXGEN_EYE_S
+ j
);
1460 emit_op2(p
, OPCODE_DP4
, out_texgen
, WRITEMASK_X
<< j
,
1464 case TXG_SPHERE_MAP
:
1465 sphere_mask
|= WRITEMASK_X
<< j
;
1467 case TXG_REFLECTION_MAP
:
1468 reflect_mask
|= WRITEMASK_X
<< j
;
1470 case TXG_NORMAL_MAP
:
1471 normal_mask
|= WRITEMASK_X
<< j
;
1474 copy_mask
|= WRITEMASK_X
<< j
;
1479 build_sphere_texgen(p
, out_texgen
, sphere_mask
);
1483 build_reflect_texgen(p
, out_texgen
, reflect_mask
);
1487 struct ureg normal
= get_transformed_normal(p
);
1488 emit_op1(p
, OPCODE_MOV
, out_texgen
, normal_mask
, normal
);
1492 struct ureg in
= register_input(p
, VERT_ATTRIB_TEX0
+i
);
1493 emit_op1(p
, OPCODE_MOV
, out_texgen
, copy_mask
, in
);
1497 if (texmat_enabled
) {
1498 struct ureg texmat
[4];
1499 struct ureg in
= (!is_undef(out_texgen
) ?
1501 register_input(p
, VERT_ATTRIB_TEX0
+i
));
1502 if (p
->mvp_with_dp4
) {
1503 register_matrix_param5( p
, STATE_TEXTURE_MATRIX
, i
, 0, 3,
1505 emit_matrix_transform_vec4( p
, out
, texmat
, in
);
1508 register_matrix_param5( p
, STATE_TEXTURE_MATRIX
, i
, 0, 3,
1509 STATE_MATRIX_TRANSPOSE
, texmat
);
1510 emit_transpose_matrix_transform_vec4( p
, out
, texmat
, in
);
1517 emit_passthrough(p
, VERT_ATTRIB_TEX0
+i
, VERT_RESULT_TEX0
+i
);
1524 * Point size attenuation computation.
1526 static void build_atten_pointsize( struct tnl_program
*p
)
1528 struct ureg eye
= get_eye_position_z(p
);
1529 struct ureg state_size
= register_param2(p
, STATE_INTERNAL
, STATE_POINT_SIZE_CLAMPED
);
1530 struct ureg state_attenuation
= register_param1(p
, STATE_POINT_ATTENUATION
);
1531 struct ureg out
= register_output(p
, VERT_RESULT_PSIZ
);
1532 struct ureg ut
= get_temp(p
);
1535 emit_op1(p
, OPCODE_ABS
, ut
, WRITEMASK_Y
, swizzle1(eye
, Z
));
1536 /* p1 + dist * (p2 + dist * p3); */
1537 emit_op3(p
, OPCODE_MAD
, ut
, WRITEMASK_X
, swizzle1(ut
, Y
),
1538 swizzle1(state_attenuation
, Z
), swizzle1(state_attenuation
, Y
));
1539 emit_op3(p
, OPCODE_MAD
, ut
, WRITEMASK_X
, swizzle1(ut
, Y
),
1540 ut
, swizzle1(state_attenuation
, X
));
1542 /* 1 / sqrt(factor) */
1543 emit_op1(p
, OPCODE_RSQ
, ut
, WRITEMASK_X
, ut
);
1546 /* out = pointSize / sqrt(factor) */
1547 emit_op2(p
, OPCODE_MUL
, out
, WRITEMASK_X
, ut
, state_size
);
1549 /* this is a good place to clamp the point size since there's likely
1550 * no hardware registers to clamp point size at rasterization time.
1552 emit_op2(p
, OPCODE_MUL
, ut
, WRITEMASK_X
, ut
, state_size
);
1553 emit_op2(p
, OPCODE_MAX
, ut
, WRITEMASK_X
, ut
, swizzle1(state_size
, Y
));
1554 emit_op2(p
, OPCODE_MIN
, out
, WRITEMASK_X
, ut
, swizzle1(state_size
, Z
));
1557 release_temp(p
, ut
);
1562 * Pass-though per-vertex point size, from user's point size array.
1564 static void build_array_pointsize( struct tnl_program
*p
)
1566 struct ureg in
= register_input(p
, VERT_ATTRIB_POINT_SIZE
);
1567 struct ureg out
= register_output(p
, VERT_RESULT_PSIZ
);
1568 emit_op1(p
, OPCODE_MOV
, out
, WRITEMASK_X
, in
);
1572 static void build_tnl_program( struct tnl_program
*p
)
1574 /* Emit the program, starting with the modelview, projection transforms:
1578 /* Lighting calculations:
1580 if (p
->state
->fragprog_inputs_read
& (FRAG_BIT_COL0
|FRAG_BIT_COL1
)) {
1581 if (p
->state
->light_global_enabled
)
1584 if (p
->state
->fragprog_inputs_read
& FRAG_BIT_COL0
)
1585 emit_passthrough(p
, VERT_ATTRIB_COLOR0
, VERT_RESULT_COL0
);
1587 if (p
->state
->fragprog_inputs_read
& FRAG_BIT_COL1
)
1588 emit_passthrough(p
, VERT_ATTRIB_COLOR1
, VERT_RESULT_COL1
);
1592 if (p
->state
->fragprog_inputs_read
& FRAG_BIT_FOGC
)
1595 if (p
->state
->fragprog_inputs_read
& FRAG_BITS_TEX_ANY
)
1596 build_texture_transform(p
);
1598 if (p
->state
->point_attenuated
)
1599 build_atten_pointsize(p
);
1600 else if (p
->state
->point_array
)
1601 build_array_pointsize(p
);
1605 emit_op1(p
, OPCODE_END
, undef
, 0, undef
);
1616 create_new_program( const struct state_key
*key
,
1617 struct gl_vertex_program
*program
,
1618 GLboolean mvp_with_dp4
,
1621 struct tnl_program p
;
1623 memset(&p
, 0, sizeof(p
));
1625 p
.program
= program
;
1626 p
.eye_position
= undef
;
1627 p
.eye_position_z
= undef
;
1628 p
.eye_position_normalized
= undef
;
1629 p
.transformed_normal
= undef
;
1632 p
.mvp_with_dp4
= mvp_with_dp4
;
1634 if (max_temps
>= sizeof(int) * 8)
1635 p
.temp_reserved
= 0;
1637 p
.temp_reserved
= ~((1<<max_temps
)-1);
1639 /* Start by allocating 32 instructions.
1640 * If we need more, we'll grow the instruction array as needed.
1643 p
.program
->Base
.Instructions
= _mesa_alloc_instructions(p
.max_inst
);
1644 p
.program
->Base
.String
= NULL
;
1645 p
.program
->Base
.NumInstructions
=
1646 p
.program
->Base
.NumTemporaries
=
1647 p
.program
->Base
.NumParameters
=
1648 p
.program
->Base
.NumAttributes
= p
.program
->Base
.NumAddressRegs
= 0;
1649 p
.program
->Base
.Parameters
= _mesa_new_parameter_list();
1650 p
.program
->Base
.InputsRead
= 0;
1651 p
.program
->Base
.OutputsWritten
= 0;
1653 build_tnl_program( &p
);
1658 * Return a vertex program which implements the current fixed-function
1659 * transform/lighting/texgen operations.
1661 struct gl_vertex_program
*
1662 _mesa_get_fixed_func_vertex_program(struct gl_context
*ctx
)
1664 struct gl_vertex_program
*prog
;
1665 struct state_key key
;
1667 /* Grab all the relevent state and put it in a single structure:
1669 make_state_key(ctx
, &key
);
1671 /* Look for an already-prepared program for this state:
1673 prog
= gl_vertex_program(
1674 _mesa_search_program_cache(ctx
->VertexProgram
.Cache
, &key
, sizeof(key
)));
1677 /* OK, we'll have to build a new one */
1679 printf("Build new TNL program\n");
1681 prog
= gl_vertex_program(ctx
->Driver
.NewProgram(ctx
, GL_VERTEX_PROGRAM_ARB
, 0));
1685 create_new_program( &key
, prog
,
1687 ctx
->Const
.VertexProgram
.MaxTemps
);
1690 if (ctx
->Driver
.ProgramStringNotify
)
1691 ctx
->Driver
.ProgramStringNotify( ctx
, GL_VERTEX_PROGRAM_ARB
,
1694 _mesa_program_cache_insert(ctx
, ctx
->VertexProgram
.Cache
,
1695 &key
, sizeof(key
), &prog
->Base
);