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/**************************************************************************
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* Copyright 2007 VMware, Inc.
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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**************************************************************************/
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* \file ffvertex_prog.c
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* Create a vertex program to execute the current fixed function T&L pipeline.
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* \author Keith Whitwell
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#include "main/errors.h"
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#include "main/glheader.h"
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#include "main/mtypes.h"
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#include "main/macros.h"
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#include "main/enums.h"
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#include "main/ffvertex_prog.h"
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#include "program/program.h"
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#include "program/prog_cache.h"
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#include "program/prog_instruction.h"
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#include "program/prog_parameter.h"
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#include "program/prog_print.h"
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#include "program/prog_statevars.h"
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#include "util/bitscan.h"
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#include "state_tracker/st_program.h"
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/** Max of number of lights and texture coord units */
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#define NUM_UNITS MAX2(MAX_TEXTURE_COORD_UNITS, MAX_LIGHTS)
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GLbitfield varying_vp_inputs;
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unsigned fragprog_inputs_read:12;
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unsigned light_color_material_mask:12;
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unsigned light_global_enabled:1;
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unsigned light_local_viewer:1;
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unsigned light_twoside:1;
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unsigned material_shininess_is_zero:1;
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unsigned need_eye_coords:1;
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unsigned rescale_normals:1;
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unsigned fog_distance_mode:2;
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unsigned separate_specular:1;
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unsigned point_attenuated:1;
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unsigned char light_enabled:1;
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unsigned char light_eyepos3_is_zero:1;
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unsigned char light_spotcutoff_is_180:1;
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unsigned char light_attenuated:1;
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unsigned char texmat_enabled:1;
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unsigned char coord_replace:1;
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unsigned char texgen_enabled:1;
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unsigned char texgen_mode0:4;
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unsigned char texgen_mode1:4;
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unsigned char texgen_mode2:4;
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unsigned char texgen_mode3:4;
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#define TXG_OBJ_LINEAR 1
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#define TXG_EYE_LINEAR 2
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#define TXG_SPHERE_MAP 3
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#define TXG_REFLECTION_MAP 4
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#define TXG_NORMAL_MAP 5
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static GLuint translate_texgen( GLboolean enabled, GLenum mode )
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case GL_OBJECT_LINEAR: return TXG_OBJ_LINEAR;
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case GL_EYE_LINEAR: return TXG_EYE_LINEAR;
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case GL_SPHERE_MAP: return TXG_SPHERE_MAP;
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case GL_REFLECTION_MAP_NV: return TXG_REFLECTION_MAP;
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case GL_NORMAL_MAP_NV: return TXG_NORMAL_MAP;
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default: return TXG_NONE;
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#define FDM_EYE_RADIAL 0
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#define FDM_EYE_PLANE 1
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#define FDM_EYE_PLANE_ABS 2
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#define FDM_FROM_ARRAY 3
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static GLuint translate_fog_distance_mode(GLenum source, GLenum mode)
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if (source == GL_FRAGMENT_DEPTH_EXT) {
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case GL_EYE_RADIAL_NV:
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return FDM_EYE_RADIAL;
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return FDM_EYE_PLANE;
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default: /* shouldn't happen; fall through to a sensible default */
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case GL_EYE_PLANE_ABSOLUTE_NV:
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return FDM_EYE_PLANE_ABS;
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return FDM_FROM_ARRAY;
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static GLboolean check_active_shininess( struct gl_context *ctx,
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const struct state_key *key,
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GLuint attr = MAT_ATTRIB_FRONT_SHININESS + side;
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if ((key->varying_vp_inputs & VERT_BIT_COLOR0) &&
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(key->light_color_material_mask & (1 << attr)))
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if (key->varying_vp_inputs & VERT_BIT_MAT(attr))
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if (ctx->Light.Material.Attrib[attr][0] != 0.0F)
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static void make_state_key( struct gl_context *ctx, struct state_key *key )
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const struct gl_program *fp = ctx->FragmentProgram._Current;
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memset(key, 0, sizeof(struct state_key));
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/* This now relies on texenvprogram.c being active:
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key->need_eye_coords = ctx->_NeedEyeCoords;
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key->fragprog_inputs_read = fp->info.inputs_read;
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key->varying_vp_inputs = ctx->VertexProgram._VaryingInputs;
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if (ctx->RenderMode == GL_FEEDBACK) {
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/* make sure the vertprog emits color and tex0 */
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key->fragprog_inputs_read |= (VARYING_BIT_COL0 | VARYING_BIT_TEX0);
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if (ctx->Light.Enabled) {
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key->light_global_enabled = 1;
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if (ctx->Light.Model.LocalViewer)
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key->light_local_viewer = 1;
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if (ctx->Light.Model.TwoSide)
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key->light_twoside = 1;
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if (ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)
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key->separate_specular = 1;
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if (ctx->Light.ColorMaterialEnabled) {
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key->light_color_material_mask = ctx->Light._ColorMaterialBitmask;
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mask = ctx->Light._EnabledLights;
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const int i = u_bit_scan(&mask);
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struct gl_light_uniforms *lu = &ctx->Light.LightSource[i];
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key->unit[i].light_enabled = 1;
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if (lu->EyePosition[3] == 0.0F)
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key->unit[i].light_eyepos3_is_zero = 1;
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if (lu->SpotCutoff == 180.0F)
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key->unit[i].light_spotcutoff_is_180 = 1;
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if (lu->ConstantAttenuation != 1.0F ||
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lu->LinearAttenuation != 0.0F ||
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lu->QuadraticAttenuation != 0.0F)
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key->unit[i].light_attenuated = 1;
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if (check_active_shininess(ctx, key, 0)) {
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key->material_shininess_is_zero = 0;
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else if (key->light_twoside &&
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check_active_shininess(ctx, key, 1)) {
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key->material_shininess_is_zero = 0;
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key->material_shininess_is_zero = 1;
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if (ctx->Transform.Normalize)
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if (ctx->Transform.RescaleNormals)
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key->rescale_normals = 1;
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/* Only distinguish fog parameters if we actually need */
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if (key->fragprog_inputs_read & VARYING_BIT_FOGC)
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key->fog_distance_mode =
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translate_fog_distance_mode(ctx->Fog.FogCoordinateSource,
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ctx->Fog.FogDistanceMode);
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if (ctx->Point._Attenuated)
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key->point_attenuated = 1;
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mask = ctx->Texture._EnabledCoordUnits | ctx->Texture._TexGenEnabled
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| ctx->Texture._TexMatEnabled | ctx->Point.CoordReplace;
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const int i = u_bit_scan(&mask);
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struct gl_fixedfunc_texture_unit *texUnit =
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&ctx->Texture.FixedFuncUnit[i];
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if (ctx->Point.PointSprite)
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if (ctx->Point.CoordReplace & (1u << i))
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key->unit[i].coord_replace = 1;
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if (ctx->Texture._TexMatEnabled & ENABLE_TEXMAT(i))
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key->unit[i].texmat_enabled = 1;
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if (texUnit->TexGenEnabled) {
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key->unit[i].texgen_enabled = 1;
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key->unit[i].texgen_mode0 =
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translate_texgen( texUnit->TexGenEnabled & (1<<0),
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texUnit->GenS.Mode );
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key->unit[i].texgen_mode1 =
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translate_texgen( texUnit->TexGenEnabled & (1<<1),
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texUnit->GenT.Mode );
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key->unit[i].texgen_mode2 =
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translate_texgen( texUnit->TexGenEnabled & (1<<2),
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texUnit->GenR.Mode );
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key->unit[i].texgen_mode3 =
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translate_texgen( texUnit->TexGenEnabled & (1<<3),
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texUnit->GenQ.Mode );
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/* Very useful debugging tool - produces annotated listing of
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* generated program with line/function references for each
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* instruction back into this file:
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/* Use uregs to represent registers internally, translate to Mesa's
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* expected formats on emit.
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* NOTE: These are passed by value extensively in this file rather
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* than as usual by pointer reference. If this disturbs you, try
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* remembering they are just 32bits in size.
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* GCC is smart enough to deal with these dword-sized structures in
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* much the same way as if I had defined them as dwords and was using
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* macros to access and set the fields. This is much nicer and easier
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GLint idx:9; /* relative addressing may be negative */
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/* sizeof(idx) should == sizeof(prog_src_reg::Index) */
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const struct state_key *state;
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struct gl_program *program;
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struct gl_program_parameter_list *state_params;
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GLuint max_inst; /** number of instructions allocated for program */
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GLboolean mvp_with_dp4;
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GLuint temp_reserved;
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struct ureg eye_position;
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struct ureg eye_position_z;
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struct ureg eye_position_normalized;
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struct ureg transformed_normal;
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struct ureg identity;
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GLuint color_materials;
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static const struct ureg undef = {
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static struct ureg make_ureg(GLuint file, GLint idx)
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reg.swz = SWIZZLE_NOOP;
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static struct ureg negate( struct ureg reg )
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static struct ureg swizzle( struct ureg reg, int x, int y, int z, int w )
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reg.swz = MAKE_SWIZZLE4(GET_SWZ(reg.swz, x),
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GET_SWZ(reg.swz, w));
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static struct ureg swizzle1( struct ureg reg, int x )
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return swizzle(reg, x, x, x, x);
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static struct ureg get_temp( struct tnl_program *p )
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int bit = ffs( ~p->temp_in_use );
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_mesa_problem(NULL, "%s: out of temporaries\n", __FILE__);
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if ((GLuint) bit > p->program->arb.NumTemporaries)
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p->program->arb.NumTemporaries = bit;
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p->temp_in_use |= 1<<(bit-1);
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return make_ureg(PROGRAM_TEMPORARY, bit-1);
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static struct ureg reserve_temp( struct tnl_program *p )
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struct ureg temp = get_temp( p );
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p->temp_reserved |= 1<<temp.idx;
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static void release_temp( struct tnl_program *p, struct ureg reg )
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if (reg.file == PROGRAM_TEMPORARY) {
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p->temp_in_use &= ~(1<<reg.idx);
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p->temp_in_use |= p->temp_reserved; /* can't release reserved temps */
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static void release_temps( struct tnl_program *p )
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p->temp_in_use = p->temp_reserved;
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static struct ureg register_param4(struct tnl_program *p,
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gl_state_index16 tokens[STATE_LENGTH];
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idx = _mesa_add_state_reference(p->state_params, tokens);
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return make_ureg(PROGRAM_STATE_VAR, idx);
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#define register_param1(p,s0) register_param4(p,s0,0,0,0)
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#define register_param2(p,s0,s1) register_param4(p,s0,s1,0,0)
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#define register_param3(p,s0,s1,s2) register_param4(p,s0,s1,s2,0)
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* \param input one of VERT_ATTRIB_x tokens.
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static struct ureg register_input( struct tnl_program *p, GLuint input )
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assert(input < VERT_ATTRIB_MAX);
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if (p->state->varying_vp_inputs & VERT_BIT(input)) {
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p->program->info.inputs_read |= (uint64_t)VERT_BIT(input);
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return make_ureg(PROGRAM_INPUT, input);
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return register_param2(p, STATE_CURRENT_ATTRIB, input);
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* \param input one of VARYING_SLOT_x tokens.
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static struct ureg register_output( struct tnl_program *p, GLuint output )
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p->program->info.outputs_written |= BITFIELD64_BIT(output);
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return make_ureg(PROGRAM_OUTPUT, output);
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static struct ureg register_const4f( struct tnl_program *p,
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gl_constant_value values[4];
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idx = _mesa_add_unnamed_constant(p->program->Parameters, values, 4,
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assert(swizzle == SWIZZLE_NOOP);
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return make_ureg(PROGRAM_CONSTANT, idx);
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#define register_const1f(p, s0) register_const4f(p, s0, 0, 0, 1)
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#define register_scalar_const(p, s0) register_const4f(p, s0, s0, s0, s0)
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#define register_const2f(p, s0, s1) register_const4f(p, s0, s1, 0, 1)
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#define register_const3f(p, s0, s1, s2) register_const4f(p, s0, s1, s2, 1)
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static GLboolean is_undef( struct ureg reg )
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return reg.file == PROGRAM_UNDEFINED;
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static struct ureg get_identity_param( struct tnl_program *p )
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if (is_undef(p->identity))
495
p->identity = register_const4f(p, 0,0,0,1);
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static void register_matrix_param5( struct tnl_program *p,
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GLint s0, /* modelview, projection, etc */
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GLint s1, /* texture matrix number */
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GLint s2, /* first row */
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GLint s3, /* last row */
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struct ureg *matrix )
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/* This is a bit sad as the support is there to pull the whole
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* matrix out in one go:
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for (i = 0; i <= s3 - s2; i++)
513
matrix[i] = register_param4(p, s0, s1, i, i);
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static void emit_arg( struct prog_src_register *src,
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src->File = reg.file;
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src->Index = reg.idx;
522
src->Swizzle = reg.swz;
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src->Negate = reg.negate ? NEGATE_XYZW : NEGATE_NONE;
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/* Check that bitfield sizes aren't exceeded */
526
assert(src->Index == reg.idx);
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static void emit_dst( struct prog_dst_register *dst,
531
struct ureg reg, GLuint mask )
533
dst->File = reg.file;
534
dst->Index = reg.idx;
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/* allow zero as a shorthand for xyzw */
536
dst->WriteMask = mask ? mask : WRITEMASK_XYZW;
537
/* Check that bitfield sizes aren't exceeded */
538
assert(dst->Index == reg.idx);
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static void debug_insn( struct prog_instruction *inst, const char *fn,
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static const char *last_fn;
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printf("%d:\t", line);
554
_mesa_print_instruction(inst);
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static void emit_op3fn(struct tnl_program *p,
570
struct prog_instruction *inst;
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assert(p->program->arb.NumInstructions <= p->max_inst);
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if (p->program->arb.NumInstructions == p->max_inst) {
575
/* need to extend the program's instruction array */
576
struct prog_instruction *newInst;
578
/* double the size */
582
rzalloc_array(p->program, struct prog_instruction, p->max_inst);
584
_mesa_error(NULL, GL_OUT_OF_MEMORY, "vertex program build");
588
_mesa_copy_instructions(newInst, p->program->arb.Instructions,
589
p->program->arb.NumInstructions);
591
ralloc_free(p->program->arb.Instructions);
593
p->program->arb.Instructions = newInst;
596
nr = p->program->arb.NumInstructions++;
598
inst = &p->program->arb.Instructions[nr];
599
inst->Opcode = (enum prog_opcode) op;
601
emit_arg( &inst->SrcReg[0], src0 );
602
emit_arg( &inst->SrcReg[1], src1 );
603
emit_arg( &inst->SrcReg[2], src2 );
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emit_dst( &inst->DstReg, dest, mask );
607
debug_insn(inst, fn, line);
611
#define emit_op3(p, op, dst, mask, src0, src1, src2) \
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emit_op3fn(p, op, dst, mask, src0, src1, src2, __func__, __LINE__)
614
#define emit_op2(p, op, dst, mask, src0, src1) \
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emit_op3fn(p, op, dst, mask, src0, src1, undef, __func__, __LINE__)
617
#define emit_op1(p, op, dst, mask, src0) \
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emit_op3fn(p, op, dst, mask, src0, undef, undef, __func__, __LINE__)
621
static struct ureg make_temp( struct tnl_program *p, struct ureg reg )
623
if (reg.file == PROGRAM_TEMPORARY &&
624
!(p->temp_reserved & (1<<reg.idx)))
627
struct ureg temp = get_temp(p);
628
emit_op1(p, OPCODE_MOV, temp, 0, reg);
634
/* Currently no tracking performed of input/output/register size or
635
* active elements. Could be used to reduce these operations, as
636
* could the matrix type.
638
static void emit_matrix_transform_vec4( struct tnl_program *p,
640
const struct ureg *mat,
643
emit_op2(p, OPCODE_DP4, dest, WRITEMASK_X, src, mat[0]);
644
emit_op2(p, OPCODE_DP4, dest, WRITEMASK_Y, src, mat[1]);
645
emit_op2(p, OPCODE_DP4, dest, WRITEMASK_Z, src, mat[2]);
646
emit_op2(p, OPCODE_DP4, dest, WRITEMASK_W, src, mat[3]);
650
/* This version is much easier to implement if writemasks are not
651
* supported natively on the target or (like SSE), the target doesn't
652
* have a clean/obvious dotproduct implementation.
654
static void emit_transpose_matrix_transform_vec4( struct tnl_program *p,
656
const struct ureg *mat,
661
if (dest.file != PROGRAM_TEMPORARY)
666
emit_op2(p, OPCODE_MUL, tmp, 0, swizzle1(src,X), mat[0]);
667
emit_op3(p, OPCODE_MAD, tmp, 0, swizzle1(src,Y), mat[1], tmp);
668
emit_op3(p, OPCODE_MAD, tmp, 0, swizzle1(src,Z), mat[2], tmp);
669
emit_op3(p, OPCODE_MAD, dest, 0, swizzle1(src,W), mat[3], tmp);
671
if (dest.file != PROGRAM_TEMPORARY)
672
release_temp(p, tmp);
676
static void emit_matrix_transform_vec3( struct tnl_program *p,
678
const struct ureg *mat,
681
emit_op2(p, OPCODE_DP3, dest, WRITEMASK_X, src, mat[0]);
682
emit_op2(p, OPCODE_DP3, dest, WRITEMASK_Y, src, mat[1]);
683
emit_op2(p, OPCODE_DP3, dest, WRITEMASK_Z, src, mat[2]);
687
static void emit_normalize_vec3( struct tnl_program *p,
691
struct ureg tmp = get_temp(p);
692
emit_op2(p, OPCODE_DP3, tmp, WRITEMASK_X, src, src);
693
emit_op1(p, OPCODE_RSQ, tmp, WRITEMASK_X, tmp);
694
emit_op2(p, OPCODE_MUL, dest, 0, src, swizzle1(tmp, X));
695
release_temp(p, tmp);
699
static void emit_passthrough( struct tnl_program *p,
703
struct ureg out = register_output(p, output);
704
emit_op1(p, OPCODE_MOV, out, 0, register_input(p, input));
708
static struct ureg get_eye_position( struct tnl_program *p )
710
if (is_undef(p->eye_position)) {
711
struct ureg pos = register_input( p, VERT_ATTRIB_POS );
712
struct ureg modelview[4];
714
p->eye_position = reserve_temp(p);
716
if (p->mvp_with_dp4) {
717
register_matrix_param5( p, STATE_MODELVIEW_MATRIX, 0, 0, 3,
720
emit_matrix_transform_vec4(p, p->eye_position, modelview, pos);
723
register_matrix_param5( p, STATE_MODELVIEW_MATRIX_TRANSPOSE, 0, 0, 3,
726
emit_transpose_matrix_transform_vec4(p, p->eye_position, modelview, pos);
730
return p->eye_position;
734
static struct ureg get_eye_position_z( struct tnl_program *p )
736
if (!is_undef(p->eye_position))
737
return swizzle1(p->eye_position, Z);
739
if (is_undef(p->eye_position_z)) {
740
struct ureg pos = register_input( p, VERT_ATTRIB_POS );
741
struct ureg modelview[4];
743
p->eye_position_z = reserve_temp(p);
745
register_matrix_param5( p, STATE_MODELVIEW_MATRIX, 0, 0, 3,
748
emit_op2(p, OPCODE_DP4, p->eye_position_z, 0, pos, modelview[2]);
751
return p->eye_position_z;
755
static struct ureg get_eye_position_normalized( struct tnl_program *p )
757
if (is_undef(p->eye_position_normalized)) {
758
struct ureg eye = get_eye_position(p);
759
p->eye_position_normalized = reserve_temp(p);
760
emit_normalize_vec3(p, p->eye_position_normalized, eye);
763
return p->eye_position_normalized;
767
static struct ureg get_transformed_normal( struct tnl_program *p )
769
if (is_undef(p->transformed_normal) &&
770
!p->state->need_eye_coords &&
771
!p->state->normalize &&
772
!(p->state->need_eye_coords == p->state->rescale_normals))
774
p->transformed_normal = register_input(p, VERT_ATTRIB_NORMAL );
776
else if (is_undef(p->transformed_normal))
778
struct ureg normal = register_input(p, VERT_ATTRIB_NORMAL );
779
struct ureg mvinv[3];
780
struct ureg transformed_normal = reserve_temp(p);
782
if (p->state->need_eye_coords) {
783
register_matrix_param5( p, STATE_MODELVIEW_MATRIX_INVTRANS, 0, 0, 2,
786
/* Transform to eye space:
788
emit_matrix_transform_vec3( p, transformed_normal, mvinv, normal );
789
normal = transformed_normal;
792
/* Normalize/Rescale:
794
if (p->state->normalize) {
795
emit_normalize_vec3( p, transformed_normal, normal );
796
normal = transformed_normal;
798
else if (p->state->need_eye_coords == p->state->rescale_normals) {
799
/* This is already adjusted for eye/non-eye rendering:
801
struct ureg rescale = register_param1(p, STATE_NORMAL_SCALE);
803
emit_op2( p, OPCODE_MUL, transformed_normal, 0, normal, rescale );
804
normal = transformed_normal;
807
assert(normal.file == PROGRAM_TEMPORARY);
808
p->transformed_normal = normal;
811
return p->transformed_normal;
815
static void build_hpos( struct tnl_program *p )
817
struct ureg pos = register_input( p, VERT_ATTRIB_POS );
818
struct ureg hpos = register_output( p, VARYING_SLOT_POS );
821
if (p->mvp_with_dp4) {
822
register_matrix_param5( p, STATE_MVP_MATRIX, 0, 0, 3,
824
emit_matrix_transform_vec4( p, hpos, mvp, pos );
827
register_matrix_param5( p, STATE_MVP_MATRIX_TRANSPOSE, 0, 0, 3,
829
emit_transpose_matrix_transform_vec4( p, hpos, mvp, pos );
834
static GLuint material_attrib( GLuint side, GLuint property )
838
return MAT_ATTRIB_FRONT_AMBIENT + side;
840
return MAT_ATTRIB_FRONT_DIFFUSE + side;
842
return MAT_ATTRIB_FRONT_SPECULAR + side;
844
return MAT_ATTRIB_FRONT_EMISSION + side;
845
case STATE_SHININESS:
846
return MAT_ATTRIB_FRONT_SHININESS + side;
848
unreachable("invalid value");
854
* Get a bitmask of which material values vary on a per-vertex basis.
856
static void set_material_flags( struct tnl_program *p )
858
p->color_materials = 0;
861
if (p->state->varying_vp_inputs & VERT_BIT_COLOR0) {
863
p->color_materials = p->state->light_color_material_mask;
866
p->materials |= ((p->state->varying_vp_inputs & VERT_BIT_MAT_ALL)
867
>> VERT_ATTRIB_MAT(0));
871
static struct ureg get_material( struct tnl_program *p, GLuint side,
874
GLuint attrib = material_attrib(side, property);
876
if (p->color_materials & (1<<attrib))
877
return register_input(p, VERT_ATTRIB_COLOR0);
878
else if (p->materials & (1<<attrib)) {
879
/* Put material values in the GENERIC slots -- they are not used
880
* for anything in fixed function mode.
882
return register_input( p, VERT_ATTRIB_MAT(attrib) );
885
return register_param2(p, STATE_MATERIAL, attrib);
888
#define SCENE_COLOR_BITS(side) (( MAT_BIT_FRONT_EMISSION | \
889
MAT_BIT_FRONT_AMBIENT | \
890
MAT_BIT_FRONT_DIFFUSE) << (side))
894
* Either return a precalculated constant value or emit code to
895
* calculate these values dynamically in the case where material calls
896
* are present between begin/end pairs.
898
* Probably want to shift this to the program compilation phase - if
899
* we always emitted the calculation here, a smart compiler could
900
* detect that it was constant (given a certain set of inputs), and
901
* lift it out of the main loop. That way the programs created here
902
* would be independent of the vertex_buffer details.
904
static struct ureg get_scenecolor( struct tnl_program *p, GLuint side )
906
if (p->materials & SCENE_COLOR_BITS(side)) {
907
struct ureg lm_ambient = register_param1(p, STATE_LIGHTMODEL_AMBIENT);
908
struct ureg material_emission = get_material(p, side, STATE_EMISSION);
909
struct ureg material_ambient = get_material(p, side, STATE_AMBIENT);
910
struct ureg material_diffuse = get_material(p, side, STATE_DIFFUSE);
911
struct ureg tmp = make_temp(p, material_diffuse);
912
emit_op3(p, OPCODE_MAD, tmp, WRITEMASK_XYZ, lm_ambient,
913
material_ambient, material_emission);
917
return register_param2( p, STATE_LIGHTMODEL_SCENECOLOR, side );
921
static struct ureg get_lightprod( struct tnl_program *p, GLuint light,
922
GLuint side, GLuint property, bool *is_state_light )
924
GLuint attrib = material_attrib(side, property);
925
if (p->materials & (1<<attrib)) {
926
struct ureg light_value =
927
register_param3(p, STATE_LIGHT, light, property);
928
*is_state_light = true;
932
*is_state_light = false;
933
return register_param3(p, STATE_LIGHTPROD, light, attrib);
938
static struct ureg calculate_light_attenuation( struct tnl_program *p,
943
struct ureg attenuation = undef;
944
struct ureg att = undef;
946
/* Calculate spot attenuation:
948
if (!p->state->unit[i].light_spotcutoff_is_180) {
949
struct ureg spot_dir_norm = register_param2(p, STATE_LIGHT_SPOT_DIR_NORMALIZED, i);
950
struct ureg spot = get_temp(p);
951
struct ureg slt = get_temp(p);
953
attenuation = register_param3(p, STATE_LIGHT, i, STATE_ATTENUATION);
956
emit_op2(p, OPCODE_DP3, spot, 0, negate(VPpli), spot_dir_norm);
957
emit_op2(p, OPCODE_SLT, slt, 0, swizzle1(spot_dir_norm,W), spot);
958
emit_op1(p, OPCODE_ABS, spot, 0, spot);
959
emit_op2(p, OPCODE_POW, spot, 0, spot, swizzle1(attenuation, W));
960
emit_op2(p, OPCODE_MUL, att, 0, slt, spot);
962
release_temp(p, spot);
963
release_temp(p, slt);
966
/* Calculate distance attenuation(See formula (2.4) at glspec 2.1 page 62):
968
* Skip the calucation when _dist_ is undefined(light_eyepos3_is_zero)
970
if (p->state->unit[i].light_attenuated && !is_undef(dist)) {
974
if (is_undef(attenuation))
975
attenuation = register_param3(p, STATE_LIGHT, i, STATE_ATTENUATION);
978
emit_op1(p, OPCODE_RCP, dist, WRITEMASK_YZ, dist);
980
emit_op2(p, OPCODE_MUL, dist, WRITEMASK_XZ, dist, swizzle1(dist,Y));
982
emit_op2(p, OPCODE_DP3, dist, 0, attenuation, dist);
984
if (!p->state->unit[i].light_spotcutoff_is_180) {
986
emit_op1(p, OPCODE_RCP, dist, 0, dist);
987
/* spot-atten * dist-atten */
988
emit_op2(p, OPCODE_MUL, att, 0, dist, att);
992
emit_op1(p, OPCODE_RCP, att, 0, dist);
1002
* lit.y = MAX(0, dots.x)
1003
* lit.z = SLT(0, dots.x)
1005
static void emit_degenerate_lit( struct tnl_program *p,
1009
struct ureg id = get_identity_param(p); /* id = {0,0,0,1} */
1011
/* Note that lit.x & lit.w will not be examined. Note also that
1012
* dots.xyzw == dots.xxxx.
1015
/* MAX lit, id, dots;
1017
emit_op2(p, OPCODE_MAX, lit, WRITEMASK_XYZW, id, dots);
1019
/* result[2] = (in > 0 ? 1 : 0)
1020
* SLT lit.z, id.z, dots; # lit.z = (0 < dots.z) ? 1 : 0
1022
emit_op2(p, OPCODE_SLT, lit, WRITEMASK_Z, swizzle1(id,Z), dots);
1026
/* Need to add some addtional parameters to allow lighting in object
1027
* space - STATE_SPOT_DIRECTION and STATE_HALF_VECTOR implicitly assume eye
1030
static void build_lighting( struct tnl_program *p )
1032
const GLboolean twoside = p->state->light_twoside;
1033
const GLboolean separate = p->state->separate_specular;
1034
GLuint nr_lights = 0, count = 0;
1035
struct ureg normal = get_transformed_normal(p);
1036
struct ureg lit = get_temp(p);
1037
struct ureg dots = get_temp(p);
1038
struct ureg _col0 = undef, _col1 = undef;
1039
struct ureg _bfc0 = undef, _bfc1 = undef;
1044
* dots.x = dot(normal, VPpli)
1045
* dots.y = dot(normal, halfAngle)
1046
* dots.z = back.shininess
1047
* dots.w = front.shininess
1050
for (i = 0; i < MAX_LIGHTS; i++)
1051
if (p->state->unit[i].light_enabled)
1054
set_material_flags(p);
1057
if (!p->state->material_shininess_is_zero) {
1058
struct ureg shininess = get_material(p, 0, STATE_SHININESS);
1059
emit_op1(p, OPCODE_MOV, dots, WRITEMASK_W, swizzle1(shininess,X));
1060
release_temp(p, shininess);
1063
_col0 = make_temp(p, get_scenecolor(p, 0));
1065
_col1 = make_temp(p, get_identity_param(p));
1071
if (!p->state->material_shininess_is_zero) {
1072
/* Note that we negate the back-face specular exponent here.
1073
* The negation will be un-done later in the back-face code below.
1075
struct ureg shininess = get_material(p, 1, STATE_SHININESS);
1076
emit_op1(p, OPCODE_MOV, dots, WRITEMASK_Z,
1077
negate(swizzle1(shininess,X)));
1078
release_temp(p, shininess);
1081
_bfc0 = make_temp(p, get_scenecolor(p, 1));
1083
_bfc1 = make_temp(p, get_identity_param(p));
1088
/* If no lights, still need to emit the scenecolor.
1091
struct ureg res0 = register_output( p, VARYING_SLOT_COL0 );
1092
emit_op1(p, OPCODE_MOV, res0, 0, _col0);
1096
struct ureg res1 = register_output( p, VARYING_SLOT_COL1 );
1097
emit_op1(p, OPCODE_MOV, res1, 0, _col1);
1101
struct ureg res0 = register_output( p, VARYING_SLOT_BFC0 );
1102
emit_op1(p, OPCODE_MOV, res0, 0, _bfc0);
1105
if (twoside && separate) {
1106
struct ureg res1 = register_output( p, VARYING_SLOT_BFC1 );
1107
emit_op1(p, OPCODE_MOV, res1, 0, _bfc1);
1110
if (nr_lights == 0) {
1115
/* Declare light products first to place them sequentially next to each
1116
* other for optimal constant uploads.
1118
struct ureg lightprod_front[MAX_LIGHTS][3];
1119
struct ureg lightprod_back[MAX_LIGHTS][3];
1120
bool lightprod_front_is_state_light[MAX_LIGHTS][3];
1121
bool lightprod_back_is_state_light[MAX_LIGHTS][3];
1123
for (i = 0; i < MAX_LIGHTS; i++) {
1124
if (p->state->unit[i].light_enabled) {
1125
lightprod_front[i][0] = get_lightprod(p, i, 0, STATE_AMBIENT,
1126
&lightprod_front_is_state_light[i][0]);
1128
lightprod_back[i][0] = get_lightprod(p, i, 1, STATE_AMBIENT,
1129
&lightprod_back_is_state_light[i][0]);
1131
lightprod_front[i][1] = get_lightprod(p, i, 0, STATE_DIFFUSE,
1132
&lightprod_front_is_state_light[i][1]);
1134
lightprod_back[i][1] = get_lightprod(p, i, 1, STATE_DIFFUSE,
1135
&lightprod_back_is_state_light[i][1]);
1137
lightprod_front[i][2] = get_lightprod(p, i, 0, STATE_SPECULAR,
1138
&lightprod_front_is_state_light[i][2]);
1140
lightprod_back[i][2] = get_lightprod(p, i, 1, STATE_SPECULAR,
1141
&lightprod_back_is_state_light[i][2]);
1145
/* Add more variables now that we'll use later, so that they are nicely
1146
* sorted in the parameter list.
1148
for (i = 0; i < MAX_LIGHTS; i++) {
1149
if (p->state->unit[i].light_enabled) {
1150
if (p->state->unit[i].light_eyepos3_is_zero)
1151
register_param2(p, STATE_LIGHT_POSITION_NORMALIZED, i);
1153
register_param2(p, STATE_LIGHT_POSITION, i);
1156
for (i = 0; i < MAX_LIGHTS; i++) {
1157
if (p->state->unit[i].light_enabled &&
1158
(!p->state->unit[i].light_spotcutoff_is_180 ||
1159
(p->state->unit[i].light_attenuated &&
1160
!p->state->unit[i].light_eyepos3_is_zero)))
1161
register_param3(p, STATE_LIGHT, i, STATE_ATTENUATION);
1164
for (i = 0; i < MAX_LIGHTS; i++) {
1165
if (p->state->unit[i].light_enabled) {
1166
struct ureg half = undef;
1167
struct ureg att = undef, VPpli = undef;
1168
struct ureg dist = undef;
1171
if (p->state->unit[i].light_eyepos3_is_zero) {
1172
VPpli = register_param2(p, STATE_LIGHT_POSITION_NORMALIZED, i);
1174
struct ureg Ppli = register_param2(p, STATE_LIGHT_POSITION, i);
1175
struct ureg V = get_eye_position(p);
1177
VPpli = get_temp(p);
1180
/* Calculate VPpli vector
1182
emit_op2(p, OPCODE_SUB, VPpli, 0, Ppli, V);
1184
/* Normalize VPpli. The dist value also used in
1185
* attenuation below.
1187
emit_op2(p, OPCODE_DP3, dist, 0, VPpli, VPpli);
1188
emit_op1(p, OPCODE_RSQ, dist, 0, dist);
1189
emit_op2(p, OPCODE_MUL, VPpli, 0, VPpli, dist);
1192
/* Calculate attenuation:
1194
att = calculate_light_attenuation(p, i, VPpli, dist);
1195
release_temp(p, dist);
1197
/* Calculate viewer direction, or use infinite viewer:
1199
if (!p->state->material_shininess_is_zero) {
1200
if (p->state->light_local_viewer) {
1201
struct ureg eye_hat = get_eye_position_normalized(p);
1203
emit_op2(p, OPCODE_SUB, half, 0, VPpli, eye_hat);
1204
emit_normalize_vec3(p, half, half);
1205
} else if (p->state->unit[i].light_eyepos3_is_zero) {
1206
half = register_param2(p, STATE_LIGHT_HALF_VECTOR, i);
1208
struct ureg z_dir = swizzle(get_identity_param(p),X,Y,W,Z);
1210
emit_op2(p, OPCODE_ADD, half, 0, VPpli, z_dir);
1211
emit_normalize_vec3(p, half, half);
1215
/* Calculate dot products:
1217
if (p->state->material_shininess_is_zero) {
1218
emit_op2(p, OPCODE_DP3, dots, 0, normal, VPpli);
1221
emit_op2(p, OPCODE_DP3, dots, WRITEMASK_X, normal, VPpli);
1222
emit_op2(p, OPCODE_DP3, dots, WRITEMASK_Y, normal, half);
1225
/* Front face lighting:
1228
/* Transform STATE_LIGHT into STATE_LIGHTPROD if needed. This isn't done in
1229
* get_lightprod to avoid using too many temps.
1231
for (int j = 0; j < 3; j++) {
1232
if (lightprod_front_is_state_light[i][j]) {
1233
struct ureg material_value = get_material(p, 0, STATE_AMBIENT + j);
1234
struct ureg tmp = get_temp(p);
1235
emit_op2(p, OPCODE_MUL, tmp, 0, lightprod_front[i][j], material_value);
1236
lightprod_front[i][j] = tmp;
1240
struct ureg ambient = lightprod_front[i][0];
1241
struct ureg diffuse = lightprod_front[i][1];
1242
struct ureg specular = lightprod_front[i][2];
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, VARYING_SLOT_COL0 );
1251
res1 = register_output( p, VARYING_SLOT_COL1 );
1255
mask1 = WRITEMASK_XYZ;
1257
res1 = register_output( p, VARYING_SLOT_COL0 );
1267
if (!is_undef(att)) {
1268
/* light is attenuated by distance */
1269
emit_op1(p, OPCODE_LIT, lit, 0, dots);
1270
emit_op2(p, OPCODE_MUL, lit, 0, lit, att);
1271
emit_op3(p, OPCODE_MAD, _col0, 0, swizzle1(lit,X), ambient, _col0);
1273
else if (!p->state->material_shininess_is_zero) {
1274
/* there's a non-zero specular term */
1275
emit_op1(p, OPCODE_LIT, lit, 0, dots);
1276
emit_op2(p, OPCODE_ADD, _col0, 0, ambient, _col0);
1279
/* no attenutation, no specular */
1280
emit_degenerate_lit(p, lit, dots);
1281
emit_op2(p, OPCODE_ADD, _col0, 0, ambient, _col0);
1284
emit_op3(p, OPCODE_MAD, res0, mask0, swizzle1(lit,Y), diffuse, _col0);
1285
emit_op3(p, OPCODE_MAD, res1, mask1, swizzle1(lit,Z), specular, _col1);
1287
release_temp(p, ambient);
1288
release_temp(p, diffuse);
1289
release_temp(p, specular);
1292
/* Back face lighting:
1295
/* Transform STATE_LIGHT into STATE_LIGHTPROD if needed. This isn't done in
1296
* get_lightprod to avoid using too many temps.
1298
for (int j = 0; j < 3; j++) {
1299
if (lightprod_back_is_state_light[i][j]) {
1300
struct ureg material_value = get_material(p, 1, STATE_AMBIENT + j);
1301
struct ureg tmp = get_temp(p);
1302
emit_op2(p, OPCODE_MUL, tmp, 1, lightprod_back[i][j], material_value);
1303
lightprod_back[i][j] = tmp;
1307
struct ureg ambient = lightprod_back[i][0];
1308
struct ureg diffuse = lightprod_back[i][1];
1309
struct ureg specular = lightprod_back[i][2];
1310
struct ureg res0, res1;
1311
GLuint mask0, mask1;
1313
if (count == nr_lights) {
1315
mask0 = WRITEMASK_XYZ;
1316
mask1 = WRITEMASK_XYZ;
1317
res0 = register_output( p, VARYING_SLOT_BFC0 );
1318
res1 = register_output( p, VARYING_SLOT_BFC1 );
1322
mask1 = WRITEMASK_XYZ;
1324
res1 = register_output( p, VARYING_SLOT_BFC0 );
1334
/* For the back face we need to negate the X and Y component
1335
* dot products. dots.Z has the negated back-face specular
1336
* exponent. We swizzle that into the W position. This
1337
* negation makes the back-face specular term positive again.
1339
dots = negate(swizzle(dots,X,Y,W,Z));
1341
if (!is_undef(att)) {
1342
emit_op1(p, OPCODE_LIT, lit, 0, dots);
1343
emit_op2(p, OPCODE_MUL, lit, 0, lit, att);
1344
emit_op3(p, OPCODE_MAD, _bfc0, 0, swizzle1(lit,X), ambient, _bfc0);
1346
else if (!p->state->material_shininess_is_zero) {
1347
emit_op1(p, OPCODE_LIT, lit, 0, dots);
1348
emit_op2(p, OPCODE_ADD, _bfc0, 0, ambient, _bfc0); /**/
1351
emit_degenerate_lit(p, lit, dots);
1352
emit_op2(p, OPCODE_ADD, _bfc0, 0, ambient, _bfc0);
1355
emit_op3(p, OPCODE_MAD, res0, mask0, swizzle1(lit,Y), diffuse, _bfc0);
1356
emit_op3(p, OPCODE_MAD, res1, mask1, swizzle1(lit,Z), specular, _bfc1);
1357
/* restore dots to its original state for subsequent lights
1358
* by negating and swizzling again.
1360
dots = negate(swizzle(dots,X,Y,W,Z));
1362
release_temp(p, ambient);
1363
release_temp(p, diffuse);
1364
release_temp(p, specular);
1367
release_temp(p, half);
1368
release_temp(p, VPpli);
1369
release_temp(p, att);
1377
static void build_fog( struct tnl_program *p )
1379
struct ureg fog = register_output(p, VARYING_SLOT_FOGC);
1382
switch (p->state->fog_distance_mode) {
1383
case FDM_EYE_RADIAL: { /* Z = sqrt(Xe*Xe + Ye*Ye + Ze*Ze) */
1384
struct ureg tmp = get_temp(p);
1385
input = get_eye_position(p);
1386
emit_op2(p, OPCODE_DP3, tmp, WRITEMASK_X, input, input);
1387
emit_op1(p, OPCODE_RSQ, tmp, WRITEMASK_X, tmp);
1388
emit_op1(p, OPCODE_RCP, fog, WRITEMASK_X, tmp);
1391
case FDM_EYE_PLANE: /* Z = Ze */
1392
input = get_eye_position_z(p);
1393
emit_op1(p, OPCODE_MOV, fog, WRITEMASK_X, input);
1395
case FDM_EYE_PLANE_ABS: /* Z = abs(Ze) */
1396
input = get_eye_position_z(p);
1397
emit_op1(p, OPCODE_ABS, fog, WRITEMASK_X, input);
1399
case FDM_FROM_ARRAY:
1400
input = swizzle1(register_input(p, VERT_ATTRIB_FOG), X);
1401
emit_op1(p, OPCODE_ABS, fog, WRITEMASK_X, input);
1404
assert(!"Bad fog mode in build_fog()");
1408
emit_op1(p, OPCODE_MOV, fog, WRITEMASK_YZW, get_identity_param(p));
1412
static void build_reflect_texgen( struct tnl_program *p,
1416
struct ureg normal = get_transformed_normal(p);
1417
struct ureg eye_hat = get_eye_position_normalized(p);
1418
struct ureg tmp = get_temp(p);
1421
emit_op2(p, OPCODE_DP3, tmp, 0, normal, eye_hat);
1423
emit_op2(p, OPCODE_ADD, tmp, 0, tmp, tmp);
1425
emit_op3(p, OPCODE_MAD, dest, writemask, negate(tmp), normal, eye_hat);
1427
release_temp(p, tmp);
1431
static void build_sphere_texgen( struct tnl_program *p,
1435
struct ureg normal = get_transformed_normal(p);
1436
struct ureg eye_hat = get_eye_position_normalized(p);
1437
struct ureg tmp = get_temp(p);
1438
struct ureg half = register_scalar_const(p, .5);
1439
struct ureg r = get_temp(p);
1440
struct ureg inv_m = get_temp(p);
1441
struct ureg id = get_identity_param(p);
1443
/* Could share the above calculations, but it would be
1444
* a fairly odd state for someone to set (both sphere and
1445
* reflection active for different texture coordinate
1446
* components. Of course - if two texture units enable
1447
* reflect and/or sphere, things start to tilt in favour
1448
* of seperating this out:
1452
emit_op2(p, OPCODE_DP3, tmp, 0, normal, eye_hat);
1454
emit_op2(p, OPCODE_ADD, tmp, 0, tmp, tmp);
1456
emit_op3(p, OPCODE_MAD, r, 0, negate(tmp), normal, eye_hat);
1458
emit_op2(p, OPCODE_ADD, tmp, 0, r, swizzle(id,X,Y,W,Z));
1459
/* rx^2 + ry^2 + (rz+1)^2 */
1460
emit_op2(p, OPCODE_DP3, tmp, 0, tmp, tmp);
1462
emit_op1(p, OPCODE_RSQ, tmp, 0, tmp);
1464
emit_op2(p, OPCODE_MUL, inv_m, 0, tmp, half);
1466
emit_op3(p, OPCODE_MAD, dest, writemask, r, inv_m, half);
1468
release_temp(p, tmp);
1470
release_temp(p, inv_m);
1474
static void build_texture_transform( struct tnl_program *p )
1478
for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++) {
1480
if (!(p->state->fragprog_inputs_read & VARYING_BIT_TEX(i)))
1483
if (p->state->unit[i].coord_replace)
1486
if (p->state->unit[i].texgen_enabled ||
1487
p->state->unit[i].texmat_enabled) {
1489
GLuint texmat_enabled = p->state->unit[i].texmat_enabled;
1490
struct ureg out = register_output(p, VARYING_SLOT_TEX0 + i);
1491
struct ureg out_texgen = undef;
1493
if (p->state->unit[i].texgen_enabled) {
1494
GLuint copy_mask = 0;
1495
GLuint sphere_mask = 0;
1496
GLuint reflect_mask = 0;
1497
GLuint normal_mask = 0;
1501
out_texgen = get_temp(p);
1505
modes[0] = p->state->unit[i].texgen_mode0;
1506
modes[1] = p->state->unit[i].texgen_mode1;
1507
modes[2] = p->state->unit[i].texgen_mode2;
1508
modes[3] = p->state->unit[i].texgen_mode3;
1510
for (j = 0; j < 4; j++) {
1512
case TXG_OBJ_LINEAR: {
1513
struct ureg obj = register_input(p, VERT_ATTRIB_POS);
1515
register_param3(p, STATE_TEXGEN, i,
1516
STATE_TEXGEN_OBJECT_S + j);
1518
emit_op2(p, OPCODE_DP4, out_texgen, WRITEMASK_X << j,
1522
case TXG_EYE_LINEAR: {
1523
struct ureg eye = get_eye_position(p);
1525
register_param3(p, STATE_TEXGEN, i,
1526
STATE_TEXGEN_EYE_S + j);
1528
emit_op2(p, OPCODE_DP4, out_texgen, WRITEMASK_X << j,
1532
case TXG_SPHERE_MAP:
1533
sphere_mask |= WRITEMASK_X << j;
1535
case TXG_REFLECTION_MAP:
1536
reflect_mask |= WRITEMASK_X << j;
1538
case TXG_NORMAL_MAP:
1539
normal_mask |= WRITEMASK_X << j;
1542
copy_mask |= WRITEMASK_X << j;
1547
build_sphere_texgen(p, out_texgen, sphere_mask);
1551
build_reflect_texgen(p, out_texgen, reflect_mask);
1555
struct ureg normal = get_transformed_normal(p);
1556
emit_op1(p, OPCODE_MOV, out_texgen, normal_mask, normal );
1560
struct ureg in = register_input(p, VERT_ATTRIB_TEX0+i);
1561
emit_op1(p, OPCODE_MOV, out_texgen, copy_mask, in );
1565
if (texmat_enabled) {
1566
struct ureg texmat[4];
1567
struct ureg in = (!is_undef(out_texgen) ?
1569
register_input(p, VERT_ATTRIB_TEX0+i));
1570
if (p->mvp_with_dp4) {
1571
register_matrix_param5( p, STATE_TEXTURE_MATRIX, i, 0, 3,
1573
emit_matrix_transform_vec4( p, out, texmat, in );
1576
register_matrix_param5( p, STATE_TEXTURE_MATRIX_TRANSPOSE, i, 0, 3,
1578
emit_transpose_matrix_transform_vec4( p, out, texmat, in );
1585
emit_passthrough(p, VERT_ATTRIB_TEX0+i, VARYING_SLOT_TEX0+i);
1592
* Point size attenuation computation.
1594
static void build_atten_pointsize( struct tnl_program *p )
1596
struct ureg eye = get_eye_position_z(p);
1597
struct ureg state_size = register_param1(p, STATE_POINT_SIZE_CLAMPED);
1598
struct ureg state_attenuation = register_param1(p, STATE_POINT_ATTENUATION);
1599
struct ureg out = register_output(p, VARYING_SLOT_PSIZ);
1600
struct ureg ut = get_temp(p);
1603
emit_op1(p, OPCODE_ABS, ut, WRITEMASK_Y, swizzle1(eye, Z));
1604
/* p1 + dist * (p2 + dist * p3); */
1605
emit_op3(p, OPCODE_MAD, ut, WRITEMASK_X, swizzle1(ut, Y),
1606
swizzle1(state_attenuation, Z), swizzle1(state_attenuation, Y));
1607
emit_op3(p, OPCODE_MAD, ut, WRITEMASK_X, swizzle1(ut, Y),
1608
ut, swizzle1(state_attenuation, X));
1610
/* 1 / sqrt(factor) */
1611
emit_op1(p, OPCODE_RSQ, ut, WRITEMASK_X, ut );
1614
/* out = pointSize / sqrt(factor) */
1615
emit_op2(p, OPCODE_MUL, out, WRITEMASK_X, ut, state_size);
1617
/* this is a good place to clamp the point size since there's likely
1618
* no hardware registers to clamp point size at rasterization time.
1620
emit_op2(p, OPCODE_MUL, ut, WRITEMASK_X, ut, state_size);
1621
emit_op2(p, OPCODE_MAX, ut, WRITEMASK_X, ut, swizzle1(state_size, Y));
1622
emit_op2(p, OPCODE_MIN, out, WRITEMASK_X, ut, swizzle1(state_size, Z));
1625
release_temp(p, ut);
1630
* Pass-though per-vertex point size, from user's point size array.
1632
static void build_array_pointsize( struct tnl_program *p )
1634
struct ureg in = register_input(p, VERT_ATTRIB_POINT_SIZE);
1635
struct ureg out = register_output(p, VARYING_SLOT_PSIZ);
1636
emit_op1(p, OPCODE_MOV, out, WRITEMASK_X, in);
1640
static void build_tnl_program( struct tnl_program *p )
1642
/* Emit the program, starting with the modelview, projection transforms:
1646
/* Lighting calculations:
1648
if (p->state->fragprog_inputs_read & (VARYING_BIT_COL0|VARYING_BIT_COL1)) {
1649
if (p->state->light_global_enabled)
1652
if (p->state->fragprog_inputs_read & VARYING_BIT_COL0)
1653
emit_passthrough(p, VERT_ATTRIB_COLOR0, VARYING_SLOT_COL0);
1655
if (p->state->fragprog_inputs_read & VARYING_BIT_COL1)
1656
emit_passthrough(p, VERT_ATTRIB_COLOR1, VARYING_SLOT_COL1);
1660
if (p->state->fragprog_inputs_read & VARYING_BIT_FOGC)
1663
if (p->state->fragprog_inputs_read & VARYING_BITS_TEX_ANY)
1664
build_texture_transform(p);
1666
if (p->state->point_attenuated)
1667
build_atten_pointsize(p);
1668
else if (p->state->varying_vp_inputs & VERT_BIT_POINT_SIZE)
1669
build_array_pointsize(p);
1673
emit_op1(p, OPCODE_END, undef, 0, undef);
1684
create_new_program( const struct state_key *key,
1685
struct gl_program *program,
1686
GLboolean mvp_with_dp4,
1689
struct tnl_program p;
1691
memset(&p, 0, sizeof(p));
1693
p.program = program;
1694
p.eye_position = undef;
1695
p.eye_position_z = undef;
1696
p.eye_position_normalized = undef;
1697
p.transformed_normal = undef;
1700
p.mvp_with_dp4 = mvp_with_dp4;
1702
if (max_temps >= sizeof(int) * 8)
1703
p.temp_reserved = 0;
1705
p.temp_reserved = ~((1<<max_temps)-1);
1707
/* Start by allocating 32 instructions.
1708
* If we need more, we'll grow the instruction array as needed.
1711
p.program->arb.Instructions =
1712
rzalloc_array(program, struct prog_instruction, p.max_inst);
1713
p.program->String = NULL;
1714
p.program->arb.NumInstructions =
1715
p.program->arb.NumTemporaries =
1716
p.program->arb.NumParameters =
1717
p.program->arb.NumAttributes = p.program->arb.NumAddressRegs = 0;
1718
p.program->Parameters = _mesa_new_parameter_list();
1719
p.program->info.inputs_read = 0;
1720
p.program->info.outputs_written = 0;
1721
p.state_params = _mesa_new_parameter_list();
1723
build_tnl_program( &p );
1725
_mesa_add_separate_state_parameters(p.program, p.state_params);
1726
_mesa_free_parameter_list(p.state_params);
1731
* Return a vertex program which implements the current fixed-function
1732
* transform/lighting/texgen operations.
1735
_mesa_get_fixed_func_vertex_program(struct gl_context *ctx)
1737
struct gl_program *prog;
1738
struct state_key key;
1740
/* We only update ctx->VertexProgram._VaryingInputs when in VP_MODE_FF _VPMode */
1741
assert(VP_MODE_FF == ctx->VertexProgram._VPMode);
1743
/* Grab all the relevant state and put it in a single structure:
1745
make_state_key(ctx, &key);
1747
/* Look for an already-prepared program for this state:
1749
prog = _mesa_search_program_cache(ctx->VertexProgram.Cache, &key,
1753
/* OK, we'll have to build a new one */
1755
printf("Build new TNL program\n");
1757
prog = ctx->Driver.NewProgram(ctx, MESA_SHADER_VERTEX, 0, true);
1761
create_new_program( &key, prog,
1762
ctx->Const.ShaderCompilerOptions[MESA_SHADER_VERTEX].OptimizeForAOS,
1763
ctx->Const.Program[MESA_SHADER_VERTEX].MaxTemps );
1765
st_program_string_notify(ctx, GL_VERTEX_PROGRAM_ARB, prog);
1767
_mesa_program_cache_insert(ctx, ctx->VertexProgram.Cache, &key,
added
removed
src/mesa/main/ffvertex_prog.c
