-static void build_lighting( struct tnl_program *p )
-{
- const GLboolean twoside = p->state->light_twoside;
- const GLboolean separate = p->state->separate_specular;
- GLuint nr_lights = 0, count = 0;
- struct ureg normal = get_eye_normal(p);
- struct ureg lit = get_temp(p);
- struct ureg dots = get_temp(p);
- struct ureg _col0 = undef, _col1 = undef;
- struct ureg _bfc0 = undef, _bfc1 = undef;
- GLuint i;
-
- for (i = 0; i < MAX_LIGHTS; i++)
- if (p->state->unit[i].light_enabled)
- nr_lights++;
-
- set_material_flags(p);
-
- {
- struct ureg shininess = get_material(p, 0, STATE_SHININESS);
- emit_op1(p, OPCODE_MOV, dots, WRITEMASK_W, swizzle1(shininess,X));
- release_temp(p, shininess);
-
- _col0 = make_temp(p, get_scenecolor(p, 0));
- if (separate)
- _col1 = make_temp(p, get_identity_param(p));
- else
- _col1 = _col0;
-
- }
-
- if (twoside) {
- struct ureg shininess = get_material(p, 1, STATE_SHININESS);
- emit_op1(p, OPCODE_MOV, dots, WRITEMASK_Z,
- negate(swizzle1(shininess,X)));
- release_temp(p, shininess);
-
- _bfc0 = make_temp(p, get_scenecolor(p, 1));
- if (separate)
- _bfc1 = make_temp(p, get_identity_param(p));
- else
- _bfc1 = _bfc0;
- }
-
-
- /* If no lights, still need to emit the scenecolor.
- */
- {
- struct ureg res0 = register_output( p, VERT_RESULT_COL0 );
- emit_op1(p, OPCODE_MOV, res0, 0, _col0);
- }
-
- if (separate) {
- struct ureg res1 = register_output( p, VERT_RESULT_COL1 );
- emit_op1(p, OPCODE_MOV, res1, 0, _col1);
- }
-
- if (twoside) {
- struct ureg res0 = register_output( p, VERT_RESULT_BFC0 );
- emit_op1(p, OPCODE_MOV, res0, 0, _bfc0);
- }
-
- if (twoside && separate) {
- struct ureg res1 = register_output( p, VERT_RESULT_BFC1 );
- emit_op1(p, OPCODE_MOV, res1, 0, _bfc1);
- }
-
- if (nr_lights == 0) {
- release_temps(p);
- return;
- }
-
-
- for (i = 0; i < MAX_LIGHTS; i++) {
- if (p->state->unit[i].light_enabled) {
- struct ureg half = undef;
- struct ureg att = undef, VPpli = undef;
-
- count++;
-
- if (p->state->unit[i].light_eyepos3_is_zero) {
- /* Can used precomputed constants in this case.
- * Attenuation never applies to infinite lights.
- */
- VPpli = register_param3(p, STATE_LIGHT, i,
- STATE_POSITION_NORMALIZED);
- if (p->state->light_local_viewer) {
- struct ureg eye_hat = get_eye_position_normalized(p);
- half = get_temp(p);
- emit_op2(p, OPCODE_SUB, half, 0, VPpli, eye_hat);
- emit_normalize_vec3(p, half, half);
- } else {
- half = register_param3(p, STATE_LIGHT, i, STATE_HALF_VECTOR);
- }
- }
- else {
- struct ureg Ppli = register_param3(p, STATE_LIGHT, i,
- STATE_POSITION);
- struct ureg V = get_eye_position(p);
- struct ureg dist = get_temp(p);
- struct ureg tmpPpli = get_temp(p);
-
- VPpli = get_temp(p);
- half = get_temp(p);
-
- /* In homogeneous object coordinates
- */
- emit_op1(p, OPCODE_RCP, dist, 0, swizzle1(Ppli, W));
- emit_op2(p, OPCODE_MUL, tmpPpli, 0, Ppli, dist);
-
- /* Calculate VPpli vector
- */
- emit_op2(p, OPCODE_SUB, VPpli, 0, tmpPpli, V);
-
- /* Normalize VPpli. The dist value also used in
- * attenuation below.
- */
- emit_op2(p, OPCODE_DP3, dist, 0, VPpli, VPpli);
- emit_op1(p, OPCODE_RSQ, dist, 0, dist);
- emit_op2(p, OPCODE_MUL, VPpli, 0, VPpli, dist);
-
-
- /* Calculate attenuation:
- */
- if (!p->state->unit[i].light_spotcutoff_is_180 ||
- p->state->unit[i].light_attenuated) {
- att = calculate_light_attenuation(p, i, VPpli, dist);
- }
-
-
- /* Calculate viewer direction, or use infinite viewer:
- */
- if (p->state->light_local_viewer) {
- struct ureg eye_hat = get_eye_position_normalized(p);
- emit_op2(p, OPCODE_SUB, half, 0, VPpli, eye_hat);
- }
- else {
- struct ureg z_dir = swizzle(get_identity_param(p),X,Y,W,Z);
- emit_op2(p, OPCODE_ADD, half, 0, VPpli, z_dir);
- }
-
- emit_normalize_vec3(p, half, half);
-
- release_temp(p, dist);
- release_temp(p, tmpPpli);
- }
-
- /* Calculate dot products:
- */
- emit_op2(p, OPCODE_DP3, dots, WRITEMASK_X, normal, VPpli);
- emit_op2(p, OPCODE_DP3, dots, WRITEMASK_Y, normal, half);
-
-
- /* Front face lighting:
- */
- {
- struct ureg ambient = get_lightprod(p, i, 0, STATE_AMBIENT);
- struct ureg diffuse = get_lightprod(p, i, 0, STATE_DIFFUSE);
- struct ureg specular = get_lightprod(p, i, 0, STATE_SPECULAR);
- struct ureg res0, res1;
- GLuint mask0, mask1;
-
- emit_op1(p, OPCODE_LIT, lit, 0, dots);
-
- if (!is_undef(att))
- emit_op2(p, OPCODE_MUL, lit, 0, lit, att);
-
-
- if (count == nr_lights) {
- if (separate) {
- mask0 = WRITEMASK_XYZ;
- mask1 = WRITEMASK_XYZ;
- res0 = register_output( p, VERT_RESULT_COL0 );
- res1 = register_output( p, VERT_RESULT_COL1 );
- }
- else {
- mask0 = 0;
- mask1 = WRITEMASK_XYZ;
- res0 = _col0;
- res1 = register_output( p, VERT_RESULT_COL0 );
- }
- } else {
- mask0 = 0;
- mask1 = 0;
- res0 = _col0;
- res1 = _col1;
- }
-
- emit_op3(p, OPCODE_MAD, _col0, 0, swizzle1(lit,X), ambient, _col0);
- emit_op3(p, OPCODE_MAD, res0, mask0, swizzle1(lit,Y), diffuse, _col0);
- emit_op3(p, OPCODE_MAD, res1, mask1, swizzle1(lit,Z), specular, _col1);
-
- release_temp(p, ambient);
- release_temp(p, diffuse);
- release_temp(p, specular);
- }
-
- /* Back face lighting:
- */
- if (twoside) {
- struct ureg ambient = get_lightprod(p, i, 1, STATE_AMBIENT);
- struct ureg diffuse = get_lightprod(p, i, 1, STATE_DIFFUSE);
- struct ureg specular = get_lightprod(p, i, 1, STATE_SPECULAR);
- struct ureg res0, res1;
- GLuint mask0, mask1;
-
- emit_op1(p, OPCODE_LIT, lit, 0, negate(swizzle(dots,X,Y,W,Z)));
-
- if (!is_undef(att))
- emit_op2(p, OPCODE_MUL, lit, 0, lit, att);
-
- if (count == nr_lights) {
- if (separate) {
- mask0 = WRITEMASK_XYZ;
- mask1 = WRITEMASK_XYZ;
- res0 = register_output( p, VERT_RESULT_BFC0 );
- res1 = register_output( p, VERT_RESULT_BFC1 );
- }
- else {
- mask0 = 0;
- mask1 = WRITEMASK_XYZ;
- res0 = _bfc0;
- res1 = register_output( p, VERT_RESULT_BFC0 );
- }
- } else {
- res0 = _bfc0;
- res1 = _bfc1;
- mask0 = 0;
- mask1 = 0;
- }
-
- emit_op3(p, OPCODE_MAD, _bfc0, 0, swizzle1(lit,X), ambient, _bfc0);
- emit_op3(p, OPCODE_MAD, res0, mask0, swizzle1(lit,Y), diffuse, _bfc0);
- emit_op3(p, OPCODE_MAD, res1, mask1, swizzle1(lit,Z), specular, _bfc1);
-
- release_temp(p, ambient);
- release_temp(p, diffuse);
- release_temp(p, specular);
- }
-
- release_temp(p, half);
- release_temp(p, VPpli);
- release_temp(p, att);
- }
- }
-
- release_temps( p );
-}
-
-
-static void build_fog( struct tnl_program *p )
-{
- struct ureg fog = register_output(p, VERT_RESULT_FOGC);
- struct ureg input;
-
- if (p->state->fog_source_is_depth) {
- input = swizzle1(get_eye_position(p), Z);
- }
- else {
- input = swizzle1(register_input(p, VERT_ATTRIB_FOG), X);
- }
-
- if (p->state->fog_mode && p->state->tnl_do_vertex_fog) {
- struct ureg params = register_param2(p, STATE_INTERNAL,
- STATE_FOG_PARAMS_OPTIMIZED);
- struct ureg tmp = get_temp(p);
- GLboolean useabs = (p->state->fog_mode != FOG_EXP2);
-
- if (useabs) {
- emit_op1(p, OPCODE_ABS, tmp, 0, input);
- }
-
- switch (p->state->fog_mode) {
- case FOG_LINEAR: {
- struct ureg id = get_identity_param(p);
- emit_op3(p, OPCODE_MAD, tmp, 0, useabs ? tmp : input,
- swizzle1(params,X), swizzle1(params,Y));
- emit_op2(p, OPCODE_MAX, tmp, 0, tmp, swizzle1(id,X)); /* saturate */
- emit_op2(p, OPCODE_MIN, fog, WRITEMASK_X, tmp, swizzle1(id,W));
- break;
- }
- case FOG_EXP:
- emit_op2(p, OPCODE_MUL, tmp, 0, useabs ? tmp : input,
- swizzle1(params,Z));
- emit_op1(p, OPCODE_EX2, fog, WRITEMASK_X, negate(tmp));
- break;
- case FOG_EXP2:
- emit_op2(p, OPCODE_MUL, tmp, 0, input, swizzle1(params,W));
- emit_op2(p, OPCODE_MUL, tmp, 0, tmp, tmp);
- emit_op1(p, OPCODE_EX2, fog, WRITEMASK_X, negate(tmp));
- break;
- }
-
- release_temp(p, tmp);
- }
- else {
- /* results = incoming fog coords (compute fog per-fragment later)
- *
- * KW: Is it really necessary to do anything in this case?
- * BP: Yes, we always need to compute the absolute value, unless
- * we want to push that down into the fragment program...
- */
- GLboolean useabs = GL_TRUE;
- emit_op1(p, useabs ? OPCODE_ABS : OPCODE_MOV, fog, WRITEMASK_X, input);
- }
-}
-
-static void build_reflect_texgen( struct tnl_program *p,
- struct ureg dest,
- GLuint writemask )
-{
- struct ureg normal = get_eye_normal(p);
- struct ureg eye_hat = get_eye_position_normalized(p);
- struct ureg tmp = get_temp(p);
-
- /* n.u */
- emit_op2(p, OPCODE_DP3, tmp, 0, normal, eye_hat);
- /* 2n.u */
- emit_op2(p, OPCODE_ADD, tmp, 0, tmp, tmp);
- /* (-2n.u)n + u */
- emit_op3(p, OPCODE_MAD, dest, writemask, negate(tmp), normal, eye_hat);
-
- release_temp(p, tmp);
-}
-
-static void build_sphere_texgen( struct tnl_program *p,
- struct ureg dest,
- GLuint writemask )
-{
- struct ureg normal = get_eye_normal(p);
- struct ureg eye_hat = get_eye_position_normalized(p);
- struct ureg tmp = get_temp(p);
- struct ureg half = register_scalar_const(p, .5);
- struct ureg r = get_temp(p);
- struct ureg inv_m = get_temp(p);
- struct ureg id = get_identity_param(p);
-
- /* Could share the above calculations, but it would be
- * a fairly odd state for someone to set (both sphere and
- * reflection active for different texture coordinate
- * components. Of course - if two texture units enable
- * reflect and/or sphere, things start to tilt in favour
- * of seperating this out:
- */
-
- /* n.u */
- emit_op2(p, OPCODE_DP3, tmp, 0, normal, eye_hat);
- /* 2n.u */
- emit_op2(p, OPCODE_ADD, tmp, 0, tmp, tmp);
- /* (-2n.u)n + u */
- emit_op3(p, OPCODE_MAD, r, 0, negate(tmp), normal, eye_hat);
- /* r + 0,0,1 */
- emit_op2(p, OPCODE_ADD, tmp, 0, r, swizzle(id,X,Y,W,Z));
- /* rx^2 + ry^2 + (rz+1)^2 */
- emit_op2(p, OPCODE_DP3, tmp, 0, tmp, tmp);
- /* 2/m */
- emit_op1(p, OPCODE_RSQ, tmp, 0, tmp);
- /* 1/m */
- emit_op2(p, OPCODE_MUL, inv_m, 0, tmp, half);
- /* r/m + 1/2 */
- emit_op3(p, OPCODE_MAD, dest, writemask, r, inv_m, half);
-
- release_temp(p, tmp);
- release_temp(p, r);
- release_temp(p, inv_m);
-}
-
-
-static void build_texture_transform( struct tnl_program *p )
-{
- GLuint i, j;
-
- for (i = 0; i < MAX_TEXTURE_UNITS; i++) {
-
- if (!(p->state->fragprog_inputs_read & FRAG_BIT_TEX(i)))
- continue;
-
- if (p->state->unit[i].texgen_enabled ||
- p->state->unit[i].texmat_enabled) {
-
- GLuint texmat_enabled = p->state->unit[i].texmat_enabled;
- struct ureg out = register_output(p, VERT_RESULT_TEX0 + i);
- struct ureg out_texgen = undef;
-
- if (p->state->unit[i].texgen_enabled) {
- GLuint copy_mask = 0;
- GLuint sphere_mask = 0;
- GLuint reflect_mask = 0;
- GLuint normal_mask = 0;
- GLuint modes[4];
-
- if (texmat_enabled)
- out_texgen = get_temp(p);
- else
- out_texgen = out;
-
- modes[0] = p->state->unit[i].texgen_mode0;
- modes[1] = p->state->unit[i].texgen_mode1;
- modes[2] = p->state->unit[i].texgen_mode2;
- modes[3] = p->state->unit[i].texgen_mode3;
-
- for (j = 0; j < 4; j++) {
- switch (modes[j]) {
- case TXG_OBJ_LINEAR: {
- struct ureg obj = register_input(p, VERT_ATTRIB_POS);
- struct ureg plane =
- register_param3(p, STATE_TEXGEN, i,
- STATE_TEXGEN_OBJECT_S + j);
-
- emit_op2(p, OPCODE_DP4, out_texgen, WRITEMASK_X << j,
- obj, plane );
- break;
- }
- case TXG_EYE_LINEAR: {
- struct ureg eye = get_eye_position(p);
- struct ureg plane =
- register_param3(p, STATE_TEXGEN, i,
- STATE_TEXGEN_EYE_S + j);
-
- emit_op2(p, OPCODE_DP4, out_texgen, WRITEMASK_X << j,
- eye, plane );
- break;
- }
- case TXG_SPHERE_MAP:
- sphere_mask |= WRITEMASK_X << j;
- break;
- case TXG_REFLECTION_MAP:
- reflect_mask |= WRITEMASK_X << j;
- break;
- case TXG_NORMAL_MAP:
- normal_mask |= WRITEMASK_X << j;
- break;
- case TXG_NONE:
- copy_mask |= WRITEMASK_X << j;
- }
-
- }
-
-
- if (sphere_mask) {
- build_sphere_texgen(p, out_texgen, sphere_mask);
- }
-
- if (reflect_mask) {
- build_reflect_texgen(p, out_texgen, reflect_mask);
- }
-
- if (normal_mask) {
- struct ureg normal = get_eye_normal(p);
- emit_op1(p, OPCODE_MOV, out_texgen, normal_mask, normal );
- }
-
- if (copy_mask) {
- struct ureg in = register_input(p, VERT_ATTRIB_TEX0+i);
- emit_op1(p, OPCODE_MOV, out_texgen, copy_mask, in );
- }
- }
-
- if (texmat_enabled) {
- struct ureg texmat[4];
- struct ureg in = (!is_undef(out_texgen) ?
- out_texgen :
- register_input(p, VERT_ATTRIB_TEX0+i));
- if (PREFER_DP4) {
- register_matrix_param5( p, STATE_TEXTURE_MATRIX, i, 0, 3,
- 0, texmat );
- emit_matrix_transform_vec4( p, out, texmat, in );
- }
- else {
- register_matrix_param5( p, STATE_TEXTURE_MATRIX, i, 0, 3,
- STATE_MATRIX_TRANSPOSE, texmat );
- emit_transpose_matrix_transform_vec4( p, out, texmat, in );
- }
- }
-
- release_temps(p);
- }
- else {
- emit_passthrough(p, VERT_ATTRIB_TEX0+i, VERT_RESULT_TEX0+i);
- }
- }
-}
-
-
-static void build_pointsize( struct tnl_program *p )
-{
- struct ureg eye = get_eye_position(p);
- struct ureg state_size = register_param1(p, STATE_POINT_SIZE);
- struct ureg state_attenuation = register_param1(p, STATE_POINT_ATTENUATION);
- struct ureg out = register_output(p, VERT_RESULT_PSIZ);
- struct ureg ut = get_temp(p);
-
- /* dist = |eyez| */
- emit_op1(p, OPCODE_ABS, ut, WRITEMASK_Y, swizzle1(eye, Z));
- /* p1 + dist * (p2 + dist * p3); */
- emit_op3(p, OPCODE_MAD, ut, WRITEMASK_X, swizzle1(ut, Y),
- swizzle1(state_attenuation, Z), swizzle1(state_attenuation, Y));
- emit_op3(p, OPCODE_MAD, ut, WRITEMASK_X, swizzle1(ut, Y),
- ut, swizzle1(state_attenuation, X));
-
- /* 1 / sqrt(factor) */
- emit_op1(p, OPCODE_RSQ, ut, WRITEMASK_X, ut );
-
-#if 1
- /* out = pointSize / sqrt(factor) */
- emit_op2(p, OPCODE_MUL, out, WRITEMASK_X, ut, state_size);
-#else
- /* not sure, might make sense to do clamping here,
- but it's not done in t_vb_points neither */
- emit_op2(p, OPCODE_MUL, ut, WRITEMASK_X, ut, state_size);
- emit_op2(p, OPCODE_MAX, ut, WRITEMASK_X, ut, swizzle1(state_size, Y));
- emit_op2(p, OPCODE_MIN, out, WRITEMASK_X, ut, swizzle1(state_size, Z));
-#endif
-
- release_temp(p, ut);
-}
-
-static void build_tnl_program( struct tnl_program *p )
-{ /* Emit the program, starting with modelviewproject:
- */
- build_hpos(p);
-
- /* Lighting calculations:
- */
- if (p->state->fragprog_inputs_read & (FRAG_BIT_COL0|FRAG_BIT_COL1)) {
- if (p->state->light_global_enabled)
- build_lighting(p);
- else {
- if (p->state->fragprog_inputs_read & FRAG_BIT_COL0)
- emit_passthrough(p, VERT_ATTRIB_COLOR0, VERT_RESULT_COL0);
-
- if (p->state->fragprog_inputs_read & FRAG_BIT_COL1)
- emit_passthrough(p, VERT_ATTRIB_COLOR1, VERT_RESULT_COL1);
- }
- }
-
- if ((p->state->fragprog_inputs_read & FRAG_BIT_FOGC) ||
- p->state->fog_mode != FOG_NONE)
- build_fog(p);
-
- if (p->state->fragprog_inputs_read & FRAG_BITS_TEX_ANY)
- build_texture_transform(p);
-
- if (p->state->point_attenuated)
- build_pointsize(p);
-
- /* Finish up:
- */
- emit_op1(p, OPCODE_END, undef, 0, undef);
-
- /* Disassemble:
- */
- if (DISASSEM) {
- _mesa_printf ("\n");
- }
-}
-
-
-static void
-create_new_program( const struct state_key *key,
- struct gl_vertex_program *program,
- GLuint max_temps)
-{
- struct tnl_program p;
-
- _mesa_memset(&p, 0, sizeof(p));
- p.state = key;
- p.program = program;
- p.eye_position = undef;
- p.eye_position_normalized = undef;
- p.eye_normal = undef;
- p.identity = undef;
- p.temp_in_use = 0;
-
- if (max_temps >= sizeof(int) * 8)
- p.temp_reserved = 0;
- else
- p.temp_reserved = ~((1<<max_temps)-1);
-
- p.program->Base.Instructions = _mesa_alloc_instructions(MAX_INSN);
- p.program->Base.String = NULL;
- p.program->Base.NumInstructions =
- p.program->Base.NumTemporaries =
- p.program->Base.NumParameters =
- p.program->Base.NumAttributes = p.program->Base.NumAddressRegs = 0;
- p.program->Base.Parameters = _mesa_new_parameter_list();
- p.program->Base.InputsRead = 0;
- p.program->Base.OutputsWritten = 0;
-
- build_tnl_program( &p );
-}
-
-static void *search_cache( struct tnl_cache *cache,
- GLuint hash,
- const void *key,
- GLuint keysize)
-{
- struct tnl_cache_item *c;
-
- for (c = cache->items[hash % cache->size]; c; c = c->next) {
- if (c->hash == hash && _mesa_memcmp(c->key, key, keysize) == 0)
- return c->data;
- }
-
- return NULL;
-}
-
-static void rehash( struct tnl_cache *cache )
-{
- struct tnl_cache_item **items;
- struct tnl_cache_item *c, *next;
- GLuint size, i;
-
- size = cache->size * 3;
- items = (struct tnl_cache_item**) _mesa_malloc(size * sizeof(*items));
- _mesa_memset(items, 0, size * sizeof(*items));
-
- for (i = 0; i < cache->size; i++)
- for (c = cache->items[i]; c; c = next) {
- next = c->next;
- c->next = items[c->hash % size];
- items[c->hash % size] = c;
- }
-
- FREE(cache->items);
- cache->items = items;
- cache->size = size;
-}
-
-static void cache_item( struct tnl_cache *cache,
- GLuint hash,
- void *key,
- void *data )
-{
- struct tnl_cache_item *c = (struct tnl_cache_item*) _mesa_malloc(sizeof(*c));
- c->hash = hash;
- c->key = key;
- c->data = data;
-
- if (++cache->n_items > cache->size * 1.5)
- rehash(cache);
-
- c->next = cache->items[hash % cache->size];
- cache->items[hash % cache->size] = c;
-}
-
-static GLuint hash_key( struct state_key *key )
-{
- GLuint *ikey = (GLuint *)key;
- GLuint hash = 0, i;
-
- /* I'm sure this can be improved on, but speed is important:
- */
- for (i = 0; i < sizeof(*key)/sizeof(GLuint); i++)
- hash ^= ikey[i];
-
- return hash;
-}
-