-struct state_key {
- unsigned light_global_enabled:1;
- unsigned light_local_viewer:1;
- unsigned light_twoside:1;
- unsigned light_color_material:1;
- unsigned light_color_material_mask:12;
- unsigned light_material_mask:12;
-
- unsigned normalize:1;
- unsigned rescale_normals:1;
- unsigned fog_source_is_depth:1;
- unsigned tnl_do_vertex_fog:1;
- unsigned separate_specular:1;
- unsigned fog_mode:2;
- unsigned point_attenuated:1;
- unsigned texture_enabled_global:1;
- unsigned fragprog_inputs_read:12;
-
- struct {
- unsigned light_enabled:1;
- unsigned light_eyepos3_is_zero:1;
- unsigned light_spotcutoff_is_180:1;
- unsigned light_attenuated:1;
- unsigned texunit_really_enabled:1;
- unsigned texmat_enabled:1;
- unsigned texgen_enabled:4;
- unsigned texgen_mode0:4;
- unsigned texgen_mode1:4;
- unsigned texgen_mode2:4;
- unsigned texgen_mode3:4;
- } unit[8];
-};
-
-
-
-#define FOG_NONE 0
-#define FOG_LINEAR 1
-#define FOG_EXP 2
-#define FOG_EXP2 3
-
-static GLuint translate_fog_mode( GLenum mode )
-{
- switch (mode) {
- case GL_LINEAR: return FOG_LINEAR;
- case GL_EXP: return FOG_EXP;
- case GL_EXP2: return FOG_EXP2;
- default: return FOG_NONE;
- }
-}
-
-#define TXG_NONE 0
-#define TXG_OBJ_LINEAR 1
-#define TXG_EYE_LINEAR 2
-#define TXG_SPHERE_MAP 3
-#define TXG_REFLECTION_MAP 4
-#define TXG_NORMAL_MAP 5
-
-static GLuint translate_texgen( GLboolean enabled, GLenum mode )
-{
- if (!enabled)
- return TXG_NONE;
-
- switch (mode) {
- case GL_OBJECT_LINEAR: return TXG_OBJ_LINEAR;
- case GL_EYE_LINEAR: return TXG_EYE_LINEAR;
- case GL_SPHERE_MAP: return TXG_SPHERE_MAP;
- case GL_REFLECTION_MAP_NV: return TXG_REFLECTION_MAP;
- case GL_NORMAL_MAP_NV: return TXG_NORMAL_MAP;
- default: return TXG_NONE;
- }
-}
-
-static struct state_key *make_state_key( GLcontext *ctx )
-{
- TNLcontext *tnl = TNL_CONTEXT(ctx);
- struct vertex_buffer *VB = &tnl->vb;
- const struct gl_fragment_program *fp = ctx->FragmentProgram._Current;
- struct state_key *key = CALLOC_STRUCT(state_key);
- GLuint i;
-
- /* This now relies on texenvprogram.c being active:
- */
- assert(fp);
-
- key->fragprog_inputs_read = fp->Base.InputsRead;
-
- key->separate_specular = (ctx->Light.Model.ColorControl ==
- GL_SEPARATE_SPECULAR_COLOR);
-
- if (ctx->Light.Enabled) {
- key->light_global_enabled = 1;
-
- if (ctx->Light.Model.LocalViewer)
- key->light_local_viewer = 1;
-
- if (ctx->Light.Model.TwoSide)
- key->light_twoside = 1;
-
- if (ctx->Light.ColorMaterialEnabled) {
- key->light_color_material = 1;
- key->light_color_material_mask = ctx->Light.ColorMaterialBitmask;
- }
-
- for (i = _TNL_FIRST_MAT; i <= _TNL_LAST_MAT; i++)
- if (VB->AttribPtr[i]->stride)
- key->light_material_mask |= 1<<(i-_TNL_ATTRIB_MAT_FRONT_AMBIENT);
-
- for (i = 0; i < MAX_LIGHTS; i++) {
- struct gl_light *light = &ctx->Light.Light[i];
-
- if (light->Enabled) {
- key->unit[i].light_enabled = 1;
-
- if (light->EyePosition[3] == 0.0)
- key->unit[i].light_eyepos3_is_zero = 1;
-
- if (light->SpotCutoff == 180.0)
- key->unit[i].light_spotcutoff_is_180 = 1;
-
- if (light->ConstantAttenuation != 1.0 ||
- light->LinearAttenuation != 0.0 ||
- light->QuadraticAttenuation != 0.0)
- key->unit[i].light_attenuated = 1;
- }
- }
- }
-
- if (ctx->Transform.Normalize)
- key->normalize = 1;
-
- if (ctx->Transform.RescaleNormals)
- key->rescale_normals = 1;
-
- key->fog_mode = translate_fog_mode(fp->FogOption);
-
- if (ctx->Fog.FogCoordinateSource == GL_FRAGMENT_DEPTH_EXT)
- key->fog_source_is_depth = 1;
-
- if (tnl->_DoVertexFog)
- key->tnl_do_vertex_fog = 1;
-
- if (ctx->Point._Attenuated)
- key->point_attenuated = 1;
-
- if (ctx->Texture._TexGenEnabled ||
- ctx->Texture._TexMatEnabled ||
- ctx->Texture._EnabledUnits)
- key->texture_enabled_global = 1;
-
- for (i = 0; i < MAX_TEXTURE_UNITS; i++) {
- struct gl_texture_unit *texUnit = &ctx->Texture.Unit[i];
-
- if (texUnit->_ReallyEnabled)
- key->unit[i].texunit_really_enabled = 1;
-
- if (ctx->Texture._TexMatEnabled & ENABLE_TEXMAT(i))
- key->unit[i].texmat_enabled = 1;
-
- if (texUnit->TexGenEnabled) {
- key->unit[i].texgen_enabled = 1;
-
- key->unit[i].texgen_mode0 =
- translate_texgen( texUnit->TexGenEnabled & (1<<0),
- texUnit->GenModeS );
- key->unit[i].texgen_mode1 =
- translate_texgen( texUnit->TexGenEnabled & (1<<1),
- texUnit->GenModeT );
- key->unit[i].texgen_mode2 =
- translate_texgen( texUnit->TexGenEnabled & (1<<2),
- texUnit->GenModeR );
- key->unit[i].texgen_mode3 =
- translate_texgen( texUnit->TexGenEnabled & (1<<3),
- texUnit->GenModeQ );
- }
- }
-
- return key;
-}
-
-
-
-/* Very useful debugging tool - produces annotated listing of
- * generated program with line/function references for each
- * instruction back into this file:
- */
-#define DISASSEM (MESA_VERBOSE&VERBOSE_DISASSEM)
-
-/* Should be tunable by the driver - do we want to do matrix
- * multiplications with DP4's or with MUL/MAD's? SSE works better
- * with the latter, drivers may differ.
- */
-#define PREFER_DP4 0
-
-#define MAX_INSN 256
-
-/* Use uregs to represent registers internally, translate to Mesa's
- * expected formats on emit.
- *
- * NOTE: These are passed by value extensively in this file rather
- * than as usual by pointer reference. If this disturbs you, try
- * remembering they are just 32bits in size.
- *
- * GCC is smart enough to deal with these dword-sized structures in
- * much the same way as if I had defined them as dwords and was using
- * macros to access and set the fields. This is much nicer and easier
- * to evolve.
- */
-struct ureg {
- GLuint file:4;
- GLint idx:8; /* relative addressing may be negative */
- GLuint negate:1;
- GLuint swz:12;
- GLuint pad:7;
-};
-
-
-struct tnl_program {
- const struct state_key *state;
- struct gl_vertex_program *program;
-
- GLuint temp_in_use;
- GLuint temp_reserved;
-
- struct ureg eye_position;
- struct ureg eye_position_normalized;
- struct ureg eye_normal;
- struct ureg identity;
-
- GLuint materials;
- GLuint color_materials;
-};
-
-
-static const struct ureg undef = {
- PROGRAM_UNDEFINED,
- ~0,
- 0,
- 0,
- 0
-};
-
-/* Local shorthand:
- */
-#define X SWIZZLE_X
-#define Y SWIZZLE_Y
-#define Z SWIZZLE_Z
-#define W SWIZZLE_W
-
-
-/* Construct a ureg:
- */
-static struct ureg make_ureg(GLuint file, GLint idx)
-{
- struct ureg reg;
- reg.file = file;
- reg.idx = idx;
- reg.negate = 0;
- reg.swz = SWIZZLE_NOOP;
- reg.pad = 0;
- return reg;
-}
-
-
-
-static struct ureg negate( struct ureg reg )
-{
- reg.negate ^= 1;
- return reg;
-}
-
-
-static struct ureg swizzle( struct ureg reg, int x, int y, int z, int w )
-{
- reg.swz = MAKE_SWIZZLE4(GET_SWZ(reg.swz, x),
- GET_SWZ(reg.swz, y),
- GET_SWZ(reg.swz, z),
- GET_SWZ(reg.swz, w));
-
- return reg;
-}
-
-static struct ureg swizzle1( struct ureg reg, int x )
-{
- return swizzle(reg, x, x, x, x);
-}
-
-static struct ureg get_temp( struct tnl_program *p )
-{
- int bit = _mesa_ffs( ~p->temp_in_use );
- if (!bit) {
- _mesa_problem(NULL, "%s: out of temporaries\n", __FILE__);
- _mesa_exit(1);
- }
-
- if ((GLuint) bit > p->program->Base.NumTemporaries)
- p->program->Base.NumTemporaries = bit;
-
- p->temp_in_use |= 1<<(bit-1);
- return make_ureg(PROGRAM_TEMPORARY, bit-1);
-}
-
-static struct ureg reserve_temp( struct tnl_program *p )
-{
- struct ureg temp = get_temp( p );
- p->temp_reserved |= 1<<temp.idx;
- return temp;
-}
-
-static void release_temp( struct tnl_program *p, struct ureg reg )
-{
- if (reg.file == PROGRAM_TEMPORARY) {
- p->temp_in_use &= ~(1<<reg.idx);
- p->temp_in_use |= p->temp_reserved; /* can't release reserved temps */
- }
-}
-
-static void release_temps( struct tnl_program *p )
-{
- p->temp_in_use = p->temp_reserved;
-}
-
-
-
-static struct ureg register_input( struct tnl_program *p, GLuint input )
-{
- p->program->Base.InputsRead |= (1<<input);
- return make_ureg(PROGRAM_INPUT, input);
-}
-
-static struct ureg register_output( struct tnl_program *p, GLuint output )
-{
- p->program->Base.OutputsWritten |= (1<<output);
- return make_ureg(PROGRAM_OUTPUT, output);
-}
-
-static struct ureg register_const4f( struct tnl_program *p,
- GLfloat s0,
- GLfloat s1,
- GLfloat s2,
- GLfloat s3)
-{
- GLfloat values[4];
- GLint idx;
- GLuint swizzle;
- values[0] = s0;
- values[1] = s1;
- values[2] = s2;
- values[3] = s3;
- idx = _mesa_add_unnamed_constant( p->program->Base.Parameters, values, 4,
- &swizzle );
- ASSERT(swizzle == SWIZZLE_NOOP);
- return make_ureg(PROGRAM_STATE_VAR, idx);
-}
-
-#define register_const1f(p, s0) register_const4f(p, s0, 0, 0, 1)
-#define register_scalar_const(p, s0) register_const4f(p, s0, s0, s0, s0)
-#define register_const2f(p, s0, s1) register_const4f(p, s0, s1, 0, 1)
-#define register_const3f(p, s0, s1, s2) register_const4f(p, s0, s1, s2, 1)
-
-static GLboolean is_undef( struct ureg reg )
-{
- return reg.file == PROGRAM_UNDEFINED;
-}
-
-static struct ureg get_identity_param( struct tnl_program *p )
-{
- if (is_undef(p->identity))
- p->identity = register_const4f(p, 0,0,0,1);
-
- return p->identity;
-}
-
-static struct ureg register_param5(struct tnl_program *p,
- GLint s0,
- GLint s1,
- GLint s2,
- GLint s3,
- GLint s4)
-{
- gl_state_index tokens[STATE_LENGTH];
- GLint idx;
- tokens[0] = s0;
- tokens[1] = s1;
- tokens[2] = s2;
- tokens[3] = s3;
- tokens[4] = s4;
- idx = _mesa_add_state_reference( p->program->Base.Parameters, tokens );
- return make_ureg(PROGRAM_STATE_VAR, idx);
-}
-
-
-#define register_param1(p,s0) register_param5(p,s0,0,0,0,0)
-#define register_param2(p,s0,s1) register_param5(p,s0,s1,0,0,0)
-#define register_param3(p,s0,s1,s2) register_param5(p,s0,s1,s2,0,0)
-#define register_param4(p,s0,s1,s2,s3) register_param5(p,s0,s1,s2,s3,0)
-
-
-static void register_matrix_param5( struct tnl_program *p,
- GLint s0, /* modelview, projection, etc */
- GLint s1, /* texture matrix number */
- GLint s2, /* first row */
- GLint s3, /* last row */
- GLint s4, /* inverse, transpose, etc */
- struct ureg *matrix )
-{
- GLint i;
-
- /* This is a bit sad as the support is there to pull the whole
- * matrix out in one go:
- */
- for (i = 0; i <= s3 - s2; i++)
- matrix[i] = register_param5( p, s0, s1, i, i, s4 );
-}
-
-
-static void emit_arg( struct prog_src_register *src,
- struct ureg reg )
-{
- src->File = reg.file;
- src->Index = reg.idx;
- src->Swizzle = reg.swz;
- src->NegateBase = reg.negate ? NEGATE_XYZW : 0;
- src->Abs = 0;
- src->NegateAbs = 0;
- src->RelAddr = 0;
-}
-
-static void emit_dst( struct prog_dst_register *dst,
- struct ureg reg, GLuint mask )
-{
- dst->File = reg.file;
- dst->Index = reg.idx;
- /* allow zero as a shorthand for xyzw */
- dst->WriteMask = mask ? mask : WRITEMASK_XYZW;
- dst->CondMask = COND_TR;
- dst->CondSwizzle = 0;
- dst->CondSrc = 0;
- dst->pad = 0;
-}
-
-static void debug_insn( struct prog_instruction *inst, const char *fn,
- GLuint line )
-{
- if (DISASSEM) {
- static const char *last_fn;
-
- if (fn != last_fn) {
- last_fn = fn;
- _mesa_printf("%s:\n", fn);
- }
-
- _mesa_printf("%d:\t", line);
- _mesa_print_instruction(inst);
- }
-}
-
-
-static void emit_op3fn(struct tnl_program *p,
- GLuint op,
- struct ureg dest,
- GLuint mask,
- struct ureg src0,
- struct ureg src1,
- struct ureg src2,
- const char *fn,
- GLuint line)
-{
- GLuint nr = p->program->Base.NumInstructions++;
- struct prog_instruction *inst = &p->program->Base.Instructions[nr];
-
- if (p->program->Base.NumInstructions > MAX_INSN) {
- _mesa_problem(0, "Out of instructions in emit_op3fn\n");
- return;
- }
-
- inst->Opcode = (enum prog_opcode) op;
- inst->StringPos = 0;
- inst->Data = 0;
-
- emit_arg( &inst->SrcReg[0], src0 );
- emit_arg( &inst->SrcReg[1], src1 );
- emit_arg( &inst->SrcReg[2], src2 );
-
- emit_dst( &inst->DstReg, dest, mask );
-
- debug_insn(inst, fn, line);
-}
-
-
-#define emit_op3(p, op, dst, mask, src0, src1, src2) \
- emit_op3fn(p, op, dst, mask, src0, src1, src2, __FUNCTION__, __LINE__)
-
-#define emit_op2(p, op, dst, mask, src0, src1) \
- emit_op3fn(p, op, dst, mask, src0, src1, undef, __FUNCTION__, __LINE__)
-
-#define emit_op1(p, op, dst, mask, src0) \
- emit_op3fn(p, op, dst, mask, src0, undef, undef, __FUNCTION__, __LINE__)
-
-
-static struct ureg make_temp( struct tnl_program *p, struct ureg reg )
-{
- if (reg.file == PROGRAM_TEMPORARY &&
- !(p->temp_reserved & (1<<reg.idx)))
- return reg;
- else {
- struct ureg temp = get_temp(p);
- emit_op1(p, OPCODE_MOV, temp, 0, reg);
- return temp;
- }
-}
-
-
-/* Currently no tracking performed of input/output/register size or
- * active elements. Could be used to reduce these operations, as
- * could the matrix type.
- */
-static void emit_matrix_transform_vec4( struct tnl_program *p,
- struct ureg dest,
- const struct ureg *mat,
- struct ureg src)
-{
- emit_op2(p, OPCODE_DP4, dest, WRITEMASK_X, src, mat[0]);
- emit_op2(p, OPCODE_DP4, dest, WRITEMASK_Y, src, mat[1]);
- emit_op2(p, OPCODE_DP4, dest, WRITEMASK_Z, src, mat[2]);
- emit_op2(p, OPCODE_DP4, dest, WRITEMASK_W, src, mat[3]);
-}
-
-/* This version is much easier to implement if writemasks are not
- * supported natively on the target or (like SSE), the target doesn't
- * have a clean/obvious dotproduct implementation.
- */
-static void emit_transpose_matrix_transform_vec4( struct tnl_program *p,
- struct ureg dest,
- const struct ureg *mat,
- struct ureg src)
-{
- struct ureg tmp;
-
- if (dest.file != PROGRAM_TEMPORARY)
- tmp = get_temp(p);
- else
- tmp = dest;
-
- emit_op2(p, OPCODE_MUL, tmp, 0, swizzle1(src,X), mat[0]);
- emit_op3(p, OPCODE_MAD, tmp, 0, swizzle1(src,Y), mat[1], tmp);
- emit_op3(p, OPCODE_MAD, tmp, 0, swizzle1(src,Z), mat[2], tmp);
- emit_op3(p, OPCODE_MAD, dest, 0, swizzle1(src,W), mat[3], tmp);
-
- if (dest.file != PROGRAM_TEMPORARY)
- release_temp(p, tmp);
-}
-
-static void emit_matrix_transform_vec3( struct tnl_program *p,
- struct ureg dest,
- const struct ureg *mat,
- struct ureg src)
-{
- emit_op2(p, OPCODE_DP3, dest, WRITEMASK_X, src, mat[0]);
- emit_op2(p, OPCODE_DP3, dest, WRITEMASK_Y, src, mat[1]);
- emit_op2(p, OPCODE_DP3, dest, WRITEMASK_Z, src, mat[2]);
-}
-
-
-static void emit_normalize_vec3( struct tnl_program *p,
- struct ureg dest,
- struct ureg src )
-{
- struct ureg tmp = get_temp(p);
- emit_op2(p, OPCODE_DP3, tmp, 0, src, src);
- emit_op1(p, OPCODE_RSQ, tmp, 0, tmp);
- emit_op2(p, OPCODE_MUL, dest, 0, src, tmp);
- release_temp(p, tmp);
-}
-
-static void emit_passthrough( struct tnl_program *p,
- GLuint input,
- GLuint output )
-{
- struct ureg out = register_output(p, output);
- emit_op1(p, OPCODE_MOV, out, 0, register_input(p, input));
-}
-
-static struct ureg get_eye_position( struct tnl_program *p )
-{
- if (is_undef(p->eye_position)) {
- struct ureg pos = register_input( p, VERT_ATTRIB_POS );
- struct ureg modelview[4];
-
- p->eye_position = reserve_temp(p);
-
- if (PREFER_DP4) {
- register_matrix_param5( p, STATE_MODELVIEW_MATRIX, 0, 0, 3,
- 0, modelview );
-
- emit_matrix_transform_vec4(p, p->eye_position, modelview, pos);
- }
- else {
- register_matrix_param5( p, STATE_MODELVIEW_MATRIX, 0, 0, 3,
- STATE_MATRIX_TRANSPOSE, modelview );
-
- emit_transpose_matrix_transform_vec4(p, p->eye_position, modelview, pos);
- }
- }
-
- return p->eye_position;
-}
-
-
-static struct ureg get_eye_position_normalized( struct tnl_program *p )
-{
- if (is_undef(p->eye_position_normalized)) {
- struct ureg eye = get_eye_position(p);
- p->eye_position_normalized = reserve_temp(p);
- emit_normalize_vec3(p, p->eye_position_normalized, eye);
- }
-
- return p->eye_position_normalized;
-}
-
-
-static struct ureg get_eye_normal( struct tnl_program *p )
-{
- if (is_undef(p->eye_normal)) {
- struct ureg normal = register_input(p, VERT_ATTRIB_NORMAL );
- struct ureg mvinv[3];
-
- register_matrix_param5( p, STATE_MODELVIEW_MATRIX, 0, 0, 2,
- STATE_MATRIX_INVTRANS, mvinv );
-
- p->eye_normal = reserve_temp(p);
-
- /* Transform to eye space:
- */
- emit_matrix_transform_vec3( p, p->eye_normal, mvinv, normal );
-
- /* Normalize/Rescale:
- */
- if (p->state->normalize) {
- emit_normalize_vec3( p, p->eye_normal, p->eye_normal );
- }
- else if (p->state->rescale_normals) {
- struct ureg rescale = register_param2(p, STATE_INTERNAL,
- STATE_NORMAL_SCALE);
-
- emit_op2( p, OPCODE_MUL, p->eye_normal, 0, normal,
- swizzle1(rescale, X));
- }
- }
-
- return p->eye_normal;
-}
-
-
-
-static void build_hpos( struct tnl_program *p )
-{
- struct ureg pos = register_input( p, VERT_ATTRIB_POS );
- struct ureg hpos = register_output( p, VERT_RESULT_HPOS );
- struct ureg mvp[4];
-
- if (PREFER_DP4) {
- register_matrix_param5( p, STATE_MVP_MATRIX, 0, 0, 3,
- 0, mvp );
- emit_matrix_transform_vec4( p, hpos, mvp, pos );
- }
- else {
- register_matrix_param5( p, STATE_MVP_MATRIX, 0, 0, 3,
- STATE_MATRIX_TRANSPOSE, mvp );
- emit_transpose_matrix_transform_vec4( p, hpos, mvp, pos );
- }
-}
-
-
-static GLuint material_attrib( GLuint side, GLuint property )
-{
- return ((property - STATE_AMBIENT) * 2 +
- side);
-}
-
-/* Get a bitmask of which material values vary on a per-vertex basis.
- */
-static void set_material_flags( struct tnl_program *p )
-{
- p->color_materials = 0;
- p->materials = 0;
-
- if (p->state->light_color_material) {
- p->materials =
- p->color_materials = p->state->light_color_material_mask;
- }
-
- p->materials |= p->state->light_material_mask;
-}
-
-
-static struct ureg get_material( struct tnl_program *p, GLuint side,
- GLuint property )
-{
- GLuint attrib = material_attrib(side, property);
-
- if (p->color_materials & (1<<attrib))
- return register_input(p, VERT_ATTRIB_COLOR0);
- else if (p->materials & (1<<attrib))
- return register_input( p, attrib + _TNL_ATTRIB_MAT_FRONT_AMBIENT );
- else
- return register_param3( p, STATE_MATERIAL, side, property );
-}
-
-#define SCENE_COLOR_BITS(side) (( MAT_BIT_FRONT_EMISSION | \
- MAT_BIT_FRONT_AMBIENT | \
- MAT_BIT_FRONT_DIFFUSE) << (side))
-
-/* Either return a precalculated constant value or emit code to
- * calculate these values dynamically in the case where material calls
- * are present between begin/end pairs.
- *
- * Probably want to shift this to the program compilation phase - if
- * we always emitted the calculation here, a smart compiler could
- * detect that it was constant (given a certain set of inputs), and
- * lift it out of the main loop. That way the programs created here
- * would be independent of the vertex_buffer details.
- */
-static struct ureg get_scenecolor( struct tnl_program *p, GLuint side )
-{
- if (p->materials & SCENE_COLOR_BITS(side)) {
- struct ureg lm_ambient = register_param1(p, STATE_LIGHTMODEL_AMBIENT);
- struct ureg material_emission = get_material(p, side, STATE_EMISSION);
- struct ureg material_ambient = get_material(p, side, STATE_AMBIENT);
- struct ureg material_diffuse = get_material(p, side, STATE_DIFFUSE);
- struct ureg tmp = make_temp(p, material_diffuse);
- emit_op3(p, OPCODE_MAD, tmp, WRITEMASK_XYZ, lm_ambient,
- material_ambient, material_emission);
- return tmp;
- }
- else
- return register_param2( p, STATE_LIGHTMODEL_SCENECOLOR, side );
-}
-
-
-static struct ureg get_lightprod( struct tnl_program *p, GLuint light,
- GLuint side, GLuint property )
-{
- GLuint attrib = material_attrib(side, property);
- if (p->materials & (1<<attrib)) {
- struct ureg light_value =
- register_param3(p, STATE_LIGHT, light, property);
- struct ureg material_value = get_material(p, side, property);
- struct ureg tmp = get_temp(p);
- emit_op2(p, OPCODE_MUL, tmp, 0, light_value, material_value);
- return tmp;
- }
- else
- return register_param4(p, STATE_LIGHTPROD, light, side, property);
-}
-
-static struct ureg calculate_light_attenuation( struct tnl_program *p,
- GLuint i,
- struct ureg VPpli,
- struct ureg dist )
-{
- struct ureg attenuation = register_param3(p, STATE_LIGHT, i,
- STATE_ATTENUATION);
- struct ureg att = get_temp(p);
-
- /* Calculate spot attenuation:
- */
- if (!p->state->unit[i].light_spotcutoff_is_180) {
- struct ureg spot_dir_norm = register_param3(p, STATE_INTERNAL,
- STATE_SPOT_DIR_NORMALIZED, i);
- struct ureg spot = get_temp(p);
- struct ureg slt = get_temp(p);
-
- emit_op2(p, OPCODE_DP3, spot, 0, negate(VPpli), spot_dir_norm);
- emit_op2(p, OPCODE_SLT, slt, 0, swizzle1(spot_dir_norm,W), spot);
- emit_op2(p, OPCODE_POW, spot, 0, spot, swizzle1(attenuation, W));
- emit_op2(p, OPCODE_MUL, att, 0, slt, spot);
-
- release_temp(p, spot);
- release_temp(p, slt);
- }
-
- /* Calculate distance attenuation:
- */
- if (p->state->unit[i].light_attenuated) {
-
- /* 1/d,d,d,1/d */
- emit_op1(p, OPCODE_RCP, dist, WRITEMASK_YZ, dist);
- /* 1,d,d*d,1/d */
- emit_op2(p, OPCODE_MUL, dist, WRITEMASK_XZ, dist, swizzle1(dist,Y));
- /* 1/dist-atten */
- emit_op2(p, OPCODE_DP3, dist, 0, attenuation, dist);
-
- if (!p->state->unit[i].light_spotcutoff_is_180) {
- /* dist-atten */
- emit_op1(p, OPCODE_RCP, dist, 0, dist);
- /* spot-atten * dist-atten */
- emit_op2(p, OPCODE_MUL, att, 0, dist, att);
- } else {
- /* dist-atten */
- emit_op1(p, OPCODE_RCP, att, 0, dist);
- }
- }
-
- return att;
-}
-
-
-
-
-
-/* Need to add some addtional parameters to allow lighting in object
- * space - STATE_SPOT_DIRECTION and STATE_HALF_VECTOR implicitly assume eye
- * space lighting.