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| Rev | Author | Line No. | Line |
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| 1901 | serge | 1 | /* |
| 2 | * Mesa 3-D graphics library |
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| 3 | * Version: 5.1 |
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| 4 | * |
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| 5 | * Copyright (C) 1999-2003 Brian Paul All Rights Reserved. |
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| 6 | * |
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| 7 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 8 | * copy of this software and associated documentation files (the "Software"), |
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| 9 | * to deal in the Software without restriction, including without limitation |
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| 10 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 11 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 12 | * Software is furnished to do so, subject to the following conditions: |
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| 13 | * |
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| 14 | * The above copyright notice and this permission notice shall be included |
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| 15 | * in all copies or substantial portions of the Software. |
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| 16 | * |
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| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 18 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 20 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
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| 21 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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| 22 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 23 | * |
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| 24 | * |
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| 25 | * Authors: |
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| 26 | * Brian Paul |
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| 27 | * Keith Whitwell |
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| 28 | */ |
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| 29 | |||
| 30 | |||
| 31 | #if IDX & LIGHT_TWOSIDE |
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| 32 | # define NR_SIDES 2 |
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| 33 | #else |
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| 34 | # define NR_SIDES 1 |
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| 35 | #endif |
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| 36 | |||
| 37 | |||
| 38 | /* define TRACE to trace lighting code */ |
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| 39 | /* #define TRACE 1 */ |
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| 40 | |||
| 41 | /* |
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| 42 | * ctx is the current context |
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| 43 | * VB is the vertex buffer |
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| 44 | * stage is the lighting stage-private data |
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| 45 | * input is the vector of eye or object-space vertex coordinates |
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| 46 | */ |
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| 47 | static void TAG(light_rgba_spec)( struct gl_context *ctx, |
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| 48 | struct vertex_buffer *VB, |
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| 49 | struct tnl_pipeline_stage *stage, |
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| 50 | GLvector4f *input ) |
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| 51 | { |
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| 52 | struct light_stage_data *store = LIGHT_STAGE_DATA(stage); |
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| 53 | GLfloat (*base)[3] = ctx->Light._BaseColor; |
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| 54 | GLfloat sumA[2]; |
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| 55 | GLuint j; |
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| 56 | |||
| 57 | const GLuint vstride = input->stride; |
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| 58 | const GLfloat *vertex = (GLfloat *)input->data; |
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| 59 | const GLuint nstride = VB->AttribPtr[_TNL_ATTRIB_NORMAL]->stride; |
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| 60 | const GLfloat *normal = (GLfloat *)VB->AttribPtr[_TNL_ATTRIB_NORMAL]->data; |
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| 61 | |||
| 62 | GLfloat (*Fcolor)[4] = (GLfloat (*)[4]) store->LitColor[0].data; |
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| 63 | GLfloat (*Fspec)[4] = (GLfloat (*)[4]) store->LitSecondary[0].data; |
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| 64 | #if IDX & LIGHT_TWOSIDE |
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| 65 | GLfloat (*Bcolor)[4] = (GLfloat (*)[4]) store->LitColor[1].data; |
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| 66 | GLfloat (*Bspec)[4] = (GLfloat (*)[4]) store->LitSecondary[1].data; |
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| 67 | #endif |
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| 68 | |||
| 69 | const GLuint nr = VB->Count; |
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| 70 | |||
| 71 | #ifdef TRACE |
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| 72 | fprintf(stderr, "%s\n", __FUNCTION__ ); |
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| 73 | #endif |
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| 74 | |||
| 75 | VB->AttribPtr[_TNL_ATTRIB_COLOR0] = &store->LitColor[0]; |
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| 76 | VB->AttribPtr[_TNL_ATTRIB_COLOR1] = &store->LitSecondary[0]; |
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| 77 | sumA[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3]; |
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| 78 | |||
| 79 | #if IDX & LIGHT_TWOSIDE |
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| 80 | VB->BackfaceColorPtr = &store->LitColor[1]; |
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| 81 | VB->BackfaceSecondaryColorPtr = &store->LitSecondary[1]; |
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| 82 | sumA[1] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3]; |
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| 83 | #endif |
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| 84 | |||
| 85 | |||
| 86 | store->LitColor[0].stride = 16; |
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| 87 | store->LitColor[1].stride = 16; |
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| 88 | |||
| 89 | for (j = 0; j < nr; j++,STRIDE_F(vertex,vstride),STRIDE_F(normal,nstride)) { |
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| 90 | GLfloat sum[2][3], spec[2][3]; |
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| 91 | struct gl_light *light; |
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| 92 | |||
| 93 | #if IDX & LIGHT_MATERIAL |
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| 94 | update_materials( ctx, store ); |
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| 95 | sumA[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3]; |
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| 96 | #if IDX & LIGHT_TWOSIDE |
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| 97 | sumA[1] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3]; |
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| 98 | #endif |
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| 99 | #endif |
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| 100 | |||
| 101 | COPY_3V(sum[0], base[0]); |
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| 102 | ZERO_3V(spec[0]); |
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| 103 | |||
| 104 | #if IDX & LIGHT_TWOSIDE |
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| 105 | COPY_3V(sum[1], base[1]); |
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| 106 | ZERO_3V(spec[1]); |
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| 107 | #endif |
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| 108 | |||
| 109 | /* Add contribution from each enabled light source */ |
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| 110 | foreach (light, &ctx->Light.EnabledList) { |
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| 111 | GLfloat n_dot_h; |
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| 112 | GLfloat correction; |
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| 113 | GLint side; |
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| 114 | GLfloat contrib[3]; |
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| 115 | GLfloat attenuation; |
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| 116 | GLfloat VP[3]; /* unit vector from vertex to light */ |
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| 117 | GLfloat n_dot_VP; /* n dot VP */ |
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| 118 | GLfloat *h; |
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| 119 | |||
| 120 | /* compute VP and attenuation */ |
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| 121 | if (!(light->_Flags & LIGHT_POSITIONAL)) { |
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| 122 | /* directional light */ |
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| 123 | COPY_3V(VP, light->_VP_inf_norm); |
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| 124 | attenuation = light->_VP_inf_spot_attenuation; |
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| 125 | } |
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| 126 | else { |
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| 127 | GLfloat d; /* distance from vertex to light */ |
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| 128 | |||
| 129 | SUB_3V(VP, light->_Position, vertex); |
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| 130 | |||
| 131 | d = (GLfloat) LEN_3FV( VP ); |
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| 132 | |||
| 133 | if (d > 1e-6) { |
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| 134 | GLfloat invd = 1.0F / d; |
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| 135 | SELF_SCALE_SCALAR_3V(VP, invd); |
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| 136 | } |
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| 137 | |||
| 138 | attenuation = 1.0F / (light->ConstantAttenuation + d * |
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| 139 | (light->LinearAttenuation + d * |
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| 140 | light->QuadraticAttenuation)); |
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| 141 | |||
| 142 | /* spotlight attenuation */ |
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| 143 | if (light->_Flags & LIGHT_SPOT) { |
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| 144 | GLfloat PV_dot_dir = - DOT3(VP, light->_NormSpotDirection); |
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| 145 | |||
| 146 | if (PV_dot_dir |
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| 147 | continue; /* this light makes no contribution */ |
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| 148 | } |
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| 149 | else { |
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| 150 | GLdouble x = PV_dot_dir * (EXP_TABLE_SIZE-1); |
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| 151 | GLint k = (GLint) x; |
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| 152 | GLfloat spot = (GLfloat) (light->_SpotExpTable[k][0] |
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| 153 | + (x-k)*light->_SpotExpTable[k][1]); |
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| 154 | attenuation *= spot; |
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| 155 | } |
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| 156 | } |
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| 157 | } |
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| 158 | |||
| 159 | if (attenuation < 1e-3) |
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| 160 | continue; /* this light makes no contribution */ |
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| 161 | |||
| 162 | /* Compute dot product or normal and vector from V to light pos */ |
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| 163 | n_dot_VP = DOT3( normal, VP ); |
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| 164 | |||
| 165 | /* Which side gets the diffuse & specular terms? */ |
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| 166 | if (n_dot_VP < 0.0F) { |
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| 167 | ACC_SCALE_SCALAR_3V(sum[0], attenuation, light->_MatAmbient[0]); |
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| 168 | #if IDX & LIGHT_TWOSIDE |
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| 169 | side = 1; |
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| 170 | correction = -1; |
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| 171 | n_dot_VP = -n_dot_VP; |
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| 172 | #else |
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| 173 | continue; |
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| 174 | #endif |
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| 175 | } |
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| 176 | else { |
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| 177 | #if IDX & LIGHT_TWOSIDE |
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| 178 | ACC_SCALE_SCALAR_3V( sum[1], attenuation, light->_MatAmbient[1]); |
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| 179 | #endif |
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| 180 | side = 0; |
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| 181 | correction = 1; |
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| 182 | } |
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| 183 | |||
| 184 | /* diffuse term */ |
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| 185 | COPY_3V(contrib, light->_MatAmbient[side]); |
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| 186 | ACC_SCALE_SCALAR_3V(contrib, n_dot_VP, light->_MatDiffuse[side]); |
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| 187 | ACC_SCALE_SCALAR_3V(sum[side], attenuation, contrib ); |
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| 188 | |||
| 189 | /* specular term - cannibalize VP... */ |
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| 190 | if (ctx->Light.Model.LocalViewer) { |
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| 191 | GLfloat v[3]; |
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| 192 | COPY_3V(v, vertex); |
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| 193 | NORMALIZE_3FV(v); |
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| 194 | SUB_3V(VP, VP, v); /* h = VP + VPe */ |
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| 195 | h = VP; |
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| 196 | NORMALIZE_3FV(h); |
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| 197 | } |
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| 198 | else if (light->_Flags & LIGHT_POSITIONAL) { |
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| 199 | h = VP; |
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| 200 | ACC_3V(h, ctx->_EyeZDir); |
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| 201 | NORMALIZE_3FV(h); |
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| 202 | } |
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| 203 | else { |
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| 204 | h = light->_h_inf_norm; |
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| 205 | } |
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| 206 | |||
| 207 | n_dot_h = correction * DOT3(normal, h); |
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| 208 | |||
| 209 | if (n_dot_h > 0.0F) { |
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| 210 | GLfloat spec_coef; |
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| 211 | struct gl_shine_tab *tab = ctx->_ShineTable[side]; |
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| 212 | GET_SHINE_TAB_ENTRY( tab, n_dot_h, spec_coef ); |
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| 213 | |||
| 214 | if (spec_coef > 1.0e-10) { |
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| 215 | spec_coef *= attenuation; |
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| 216 | ACC_SCALE_SCALAR_3V( spec[side], spec_coef, |
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| 217 | light->_MatSpecular[side]); |
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| 218 | } |
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| 219 | } |
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| 220 | } /*loop over lights*/ |
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| 221 | |||
| 222 | COPY_3V( Fcolor[j], sum[0] ); |
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| 223 | COPY_3V( Fspec[j], spec[0] ); |
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| 224 | Fcolor[j][3] = sumA[0]; |
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| 225 | |||
| 226 | #if IDX & LIGHT_TWOSIDE |
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| 227 | COPY_3V( Bcolor[j], sum[1] ); |
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| 228 | COPY_3V( Bspec[j], spec[1] ); |
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| 229 | Bcolor[j][3] = sumA[1]; |
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| 230 | #endif |
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| 231 | } |
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| 232 | } |
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| 233 | |||
| 234 | |||
| 235 | static void TAG(light_rgba)( struct gl_context *ctx, |
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| 236 | struct vertex_buffer *VB, |
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| 237 | struct tnl_pipeline_stage *stage, |
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| 238 | GLvector4f *input ) |
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| 239 | { |
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| 240 | struct light_stage_data *store = LIGHT_STAGE_DATA(stage); |
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| 241 | GLuint j; |
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| 242 | |||
| 243 | GLfloat (*base)[3] = ctx->Light._BaseColor; |
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| 244 | GLfloat sumA[2]; |
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| 245 | |||
| 246 | const GLuint vstride = input->stride; |
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| 247 | const GLfloat *vertex = (GLfloat *) input->data; |
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| 248 | const GLuint nstride = VB->AttribPtr[_TNL_ATTRIB_NORMAL]->stride; |
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| 249 | const GLfloat *normal = (GLfloat *)VB->AttribPtr[_TNL_ATTRIB_NORMAL]->data; |
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| 250 | |||
| 251 | GLfloat (*Fcolor)[4] = (GLfloat (*)[4]) store->LitColor[0].data; |
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| 252 | #if IDX & LIGHT_TWOSIDE |
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| 253 | GLfloat (*Bcolor)[4] = (GLfloat (*)[4]) store->LitColor[1].data; |
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| 254 | #endif |
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| 255 | |||
| 256 | const GLuint nr = VB->Count; |
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| 257 | |||
| 258 | #ifdef TRACE |
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| 259 | fprintf(stderr, "%s\n", __FUNCTION__ ); |
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| 260 | #endif |
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| 261 | |||
| 262 | VB->AttribPtr[_TNL_ATTRIB_COLOR0] = &store->LitColor[0]; |
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| 263 | sumA[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3]; |
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| 264 | |||
| 265 | #if IDX & LIGHT_TWOSIDE |
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| 266 | VB->BackfaceColorPtr = &store->LitColor[1]; |
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| 267 | sumA[1] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3]; |
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| 268 | #endif |
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| 269 | |||
| 270 | store->LitColor[0].stride = 16; |
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| 271 | store->LitColor[1].stride = 16; |
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| 272 | |||
| 273 | for (j = 0; j < nr; j++,STRIDE_F(vertex,vstride),STRIDE_F(normal,nstride)) { |
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| 274 | GLfloat sum[2][3]; |
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| 275 | struct gl_light *light; |
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| 276 | |||
| 277 | #if IDX & LIGHT_MATERIAL |
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| 278 | update_materials( ctx, store ); |
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| 279 | sumA[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3]; |
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| 280 | #if IDX & LIGHT_TWOSIDE |
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| 281 | sumA[1] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3]; |
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| 282 | #endif |
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| 283 | #endif |
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| 284 | |||
| 285 | COPY_3V(sum[0], base[0]); |
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| 286 | |||
| 287 | #if IDX & LIGHT_TWOSIDE |
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| 288 | COPY_3V(sum[1], base[1]); |
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| 289 | #endif |
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| 290 | |||
| 291 | /* Add contribution from each enabled light source */ |
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| 292 | foreach (light, &ctx->Light.EnabledList) { |
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| 293 | |||
| 294 | GLfloat n_dot_h; |
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| 295 | GLfloat correction; |
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| 296 | GLint side; |
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| 297 | GLfloat contrib[3]; |
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| 298 | GLfloat attenuation = 1.0; |
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| 299 | GLfloat VP[3]; /* unit vector from vertex to light */ |
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| 300 | GLfloat n_dot_VP; /* n dot VP */ |
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| 301 | GLfloat *h; |
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| 302 | |||
| 303 | /* compute VP and attenuation */ |
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| 304 | if (!(light->_Flags & LIGHT_POSITIONAL)) { |
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| 305 | /* directional light */ |
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| 306 | COPY_3V(VP, light->_VP_inf_norm); |
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| 307 | attenuation = light->_VP_inf_spot_attenuation; |
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| 308 | } |
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| 309 | else { |
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| 310 | GLfloat d; /* distance from vertex to light */ |
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| 311 | |||
| 312 | |||
| 313 | SUB_3V(VP, light->_Position, vertex); |
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| 314 | |||
| 315 | d = (GLfloat) LEN_3FV( VP ); |
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| 316 | |||
| 317 | if ( d > 1e-6) { |
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| 318 | GLfloat invd = 1.0F / d; |
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| 319 | SELF_SCALE_SCALAR_3V(VP, invd); |
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| 320 | } |
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| 321 | |||
| 322 | attenuation = 1.0F / (light->ConstantAttenuation + d * |
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| 323 | (light->LinearAttenuation + d * |
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| 324 | light->QuadraticAttenuation)); |
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| 325 | |||
| 326 | /* spotlight attenuation */ |
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| 327 | if (light->_Flags & LIGHT_SPOT) { |
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| 328 | GLfloat PV_dot_dir = - DOT3(VP, light->_NormSpotDirection); |
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| 329 | |||
| 330 | if (PV_dot_dir |
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| 331 | continue; /* this light makes no contribution */ |
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| 332 | } |
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| 333 | else { |
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| 334 | GLdouble x = PV_dot_dir * (EXP_TABLE_SIZE-1); |
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| 335 | GLint k = (GLint) x; |
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| 336 | GLfloat spot = (GLfloat) (light->_SpotExpTable[k][0] |
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| 337 | + (x-k)*light->_SpotExpTable[k][1]); |
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| 338 | attenuation *= spot; |
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| 339 | } |
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| 340 | } |
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| 341 | } |
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| 342 | |||
| 343 | if (attenuation < 1e-3) |
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| 344 | continue; /* this light makes no contribution */ |
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| 345 | |||
| 346 | /* Compute dot product or normal and vector from V to light pos */ |
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| 347 | n_dot_VP = DOT3( normal, VP ); |
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| 348 | |||
| 349 | /* which side are we lighting? */ |
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| 350 | if (n_dot_VP < 0.0F) { |
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| 351 | ACC_SCALE_SCALAR_3V(sum[0], attenuation, light->_MatAmbient[0]); |
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| 352 | #if IDX & LIGHT_TWOSIDE |
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| 353 | side = 1; |
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| 354 | correction = -1; |
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| 355 | n_dot_VP = -n_dot_VP; |
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| 356 | #else |
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| 357 | continue; |
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| 358 | #endif |
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| 359 | } |
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| 360 | else { |
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| 361 | #if IDX & LIGHT_TWOSIDE |
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| 362 | ACC_SCALE_SCALAR_3V( sum[1], attenuation, light->_MatAmbient[1]); |
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| 363 | #endif |
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| 364 | side = 0; |
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| 365 | correction = 1; |
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| 366 | } |
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| 367 | |||
| 368 | COPY_3V(contrib, light->_MatAmbient[side]); |
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| 369 | |||
| 370 | /* diffuse term */ |
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| 371 | ACC_SCALE_SCALAR_3V(contrib, n_dot_VP, light->_MatDiffuse[side]); |
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| 372 | |||
| 373 | /* specular term - cannibalize VP... */ |
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| 374 | { |
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| 375 | if (ctx->Light.Model.LocalViewer) { |
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| 376 | GLfloat v[3]; |
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| 377 | COPY_3V(v, vertex); |
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| 378 | NORMALIZE_3FV(v); |
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| 379 | SUB_3V(VP, VP, v); /* h = VP + VPe */ |
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| 380 | h = VP; |
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| 381 | NORMALIZE_3FV(h); |
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| 382 | } |
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| 383 | else if (light->_Flags & LIGHT_POSITIONAL) { |
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| 384 | h = VP; |
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| 385 | ACC_3V(h, ctx->_EyeZDir); |
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| 386 | NORMALIZE_3FV(h); |
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| 387 | } |
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| 388 | else { |
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| 389 | h = light->_h_inf_norm; |
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| 390 | } |
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| 391 | |||
| 392 | n_dot_h = correction * DOT3(normal, h); |
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| 393 | |||
| 394 | if (n_dot_h > 0.0F) |
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| 395 | { |
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| 396 | GLfloat spec_coef; |
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| 397 | struct gl_shine_tab *tab = ctx->_ShineTable[side]; |
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| 398 | |||
| 399 | GET_SHINE_TAB_ENTRY( tab, n_dot_h, spec_coef ); |
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| 400 | |||
| 401 | ACC_SCALE_SCALAR_3V( contrib, spec_coef, |
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| 402 | light->_MatSpecular[side]); |
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| 403 | } |
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| 404 | } |
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| 405 | |||
| 406 | ACC_SCALE_SCALAR_3V( sum[side], attenuation, contrib ); |
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| 407 | } |
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| 408 | |||
| 409 | COPY_3V( Fcolor[j], sum[0] ); |
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| 410 | Fcolor[j][3] = sumA[0]; |
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| 411 | |||
| 412 | #if IDX & LIGHT_TWOSIDE |
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| 413 | COPY_3V( Bcolor[j], sum[1] ); |
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| 414 | Bcolor[j][3] = sumA[1]; |
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| 415 | #endif |
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| 416 | } |
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| 417 | } |
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| 418 | |||
| 419 | |||
| 420 | |||
| 421 | |||
| 422 | /* As below, but with just a single light. |
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| 423 | */ |
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| 424 | static void TAG(light_fast_rgba_single)( struct gl_context *ctx, |
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| 425 | struct vertex_buffer *VB, |
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| 426 | struct tnl_pipeline_stage *stage, |
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| 427 | GLvector4f *input ) |
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| 428 | |||
| 429 | { |
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| 430 | struct light_stage_data *store = LIGHT_STAGE_DATA(stage); |
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| 431 | const GLuint nstride = VB->AttribPtr[_TNL_ATTRIB_NORMAL]->stride; |
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| 432 | const GLfloat *normal = (GLfloat *)VB->AttribPtr[_TNL_ATTRIB_NORMAL]->data; |
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| 433 | GLfloat (*Fcolor)[4] = (GLfloat (*)[4]) store->LitColor[0].data; |
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| 434 | #if IDX & LIGHT_TWOSIDE |
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| 435 | GLfloat (*Bcolor)[4] = (GLfloat (*)[4]) store->LitColor[1].data; |
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| 436 | #endif |
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| 437 | const struct gl_light *light = ctx->Light.EnabledList.next; |
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| 438 | GLuint j = 0; |
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| 439 | GLfloat base[2][4]; |
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| 440 | #if IDX & LIGHT_MATERIAL |
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| 441 | const GLuint nr = VB->Count; |
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| 442 | #else |
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| 443 | const GLuint nr = VB->AttribPtr[_TNL_ATTRIB_NORMAL]->count; |
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| 444 | #endif |
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| 445 | |||
| 446 | #ifdef TRACE |
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| 447 | fprintf(stderr, "%s\n", __FUNCTION__ ); |
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| 448 | #endif |
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| 449 | |||
| 450 | (void) input; /* doesn't refer to Eye or Obj */ |
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| 451 | |||
| 452 | VB->AttribPtr[_TNL_ATTRIB_COLOR0] = &store->LitColor[0]; |
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| 453 | #if IDX & LIGHT_TWOSIDE |
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| 454 | VB->BackfaceColorPtr = &store->LitColor[1]; |
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| 455 | #endif |
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| 456 | |||
| 457 | if (nr > 1) { |
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| 458 | store->LitColor[0].stride = 16; |
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| 459 | store->LitColor[1].stride = 16; |
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| 460 | } |
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| 461 | else { |
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| 462 | store->LitColor[0].stride = 0; |
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| 463 | store->LitColor[1].stride = 0; |
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| 464 | } |
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| 465 | |||
| 466 | for (j = 0; j < nr; j++, STRIDE_F(normal,nstride)) { |
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| 467 | |||
| 468 | GLfloat n_dot_VP; |
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| 469 | |||
| 470 | #if IDX & LIGHT_MATERIAL |
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| 471 | update_materials( ctx, store ); |
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| 472 | #endif |
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| 473 | |||
| 474 | /* No attenuation, so incoporate _MatAmbient into base color. |
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| 475 | */ |
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| 476 | #if !(IDX & LIGHT_MATERIAL) |
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| 477 | if ( j == 0 ) |
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| 478 | #endif |
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| 479 | { |
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| 480 | COPY_3V(base[0], light->_MatAmbient[0]); |
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| 481 | ACC_3V(base[0], ctx->Light._BaseColor[0] ); |
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| 482 | base[0][3] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3]; |
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| 483 | |||
| 484 | #if IDX & LIGHT_TWOSIDE |
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| 485 | COPY_3V(base[1], light->_MatAmbient[1]); |
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| 486 | ACC_3V(base[1], ctx->Light._BaseColor[1]); |
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| 487 | base[1][3] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3]; |
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| 488 | #endif |
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| 489 | } |
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| 490 | |||
| 491 | n_dot_VP = DOT3(normal, light->_VP_inf_norm); |
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| 492 | |||
| 493 | if (n_dot_VP < 0.0F) { |
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| 494 | #if IDX & LIGHT_TWOSIDE |
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| 495 | GLfloat n_dot_h = -DOT3(normal, light->_h_inf_norm); |
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| 496 | GLfloat sum[3]; |
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| 497 | COPY_3V(sum, base[1]); |
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| 498 | ACC_SCALE_SCALAR_3V(sum, -n_dot_VP, light->_MatDiffuse[1]); |
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| 499 | if (n_dot_h > 0.0F) { |
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| 500 | GLfloat spec; |
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| 501 | GET_SHINE_TAB_ENTRY( ctx->_ShineTable[1], n_dot_h, spec ); |
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| 502 | ACC_SCALE_SCALAR_3V(sum, spec, light->_MatSpecular[1]); |
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| 503 | } |
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| 504 | COPY_3V(Bcolor[j], sum ); |
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| 505 | Bcolor[j][3] = base[1][3]; |
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| 506 | #endif |
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| 507 | COPY_4FV(Fcolor[j], base[0]); |
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| 508 | } |
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| 509 | else { |
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| 510 | GLfloat n_dot_h = DOT3(normal, light->_h_inf_norm); |
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| 511 | GLfloat sum[3]; |
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| 512 | COPY_3V(sum, base[0]); |
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| 513 | ACC_SCALE_SCALAR_3V(sum, n_dot_VP, light->_MatDiffuse[0]); |
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| 514 | if (n_dot_h > 0.0F) { |
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| 515 | GLfloat spec; |
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| 516 | GET_SHINE_TAB_ENTRY( ctx->_ShineTable[0], n_dot_h, spec ); |
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| 517 | ACC_SCALE_SCALAR_3V(sum, spec, light->_MatSpecular[0]); |
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| 518 | |||
| 519 | } |
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| 520 | COPY_3V(Fcolor[j], sum ); |
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| 521 | Fcolor[j][3] = base[0][3]; |
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| 522 | #if IDX & LIGHT_TWOSIDE |
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| 523 | COPY_4FV(Bcolor[j], base[1]); |
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| 524 | #endif |
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| 525 | } |
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| 526 | } |
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| 527 | } |
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| 528 | |||
| 529 | |||
| 530 | /* Light infinite lights |
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| 531 | */ |
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| 532 | static void TAG(light_fast_rgba)( struct gl_context *ctx, |
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| 533 | struct vertex_buffer *VB, |
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| 534 | struct tnl_pipeline_stage *stage, |
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| 535 | GLvector4f *input ) |
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| 536 | { |
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| 537 | struct light_stage_data *store = LIGHT_STAGE_DATA(stage); |
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| 538 | GLfloat sumA[2]; |
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| 539 | const GLuint nstride = VB->AttribPtr[_TNL_ATTRIB_NORMAL]->stride; |
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| 540 | const GLfloat *normal = (GLfloat *)VB->AttribPtr[_TNL_ATTRIB_NORMAL]->data; |
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| 541 | GLfloat (*Fcolor)[4] = (GLfloat (*)[4]) store->LitColor[0].data; |
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| 542 | #if IDX & LIGHT_TWOSIDE |
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| 543 | GLfloat (*Bcolor)[4] = (GLfloat (*)[4]) store->LitColor[1].data; |
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| 544 | #endif |
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| 545 | GLuint j = 0; |
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| 546 | #if IDX & LIGHT_MATERIAL |
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| 547 | const GLuint nr = VB->Count; |
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| 548 | #else |
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| 549 | const GLuint nr = VB->AttribPtr[_TNL_ATTRIB_NORMAL]->count; |
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| 550 | #endif |
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| 551 | const struct gl_light *light; |
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| 552 | |||
| 553 | #ifdef TRACE |
||
| 554 | fprintf(stderr, "%s %d\n", __FUNCTION__, nr ); |
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| 555 | #endif |
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| 556 | |||
| 557 | (void) input; |
||
| 558 | |||
| 559 | sumA[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3]; |
||
| 560 | sumA[1] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3]; |
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| 561 | |||
| 562 | VB->AttribPtr[_TNL_ATTRIB_COLOR0] = &store->LitColor[0]; |
||
| 563 | #if IDX & LIGHT_TWOSIDE |
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| 564 | VB->BackfaceColorPtr = &store->LitColor[1]; |
||
| 565 | #endif |
||
| 566 | |||
| 567 | if (nr > 1) { |
||
| 568 | store->LitColor[0].stride = 16; |
||
| 569 | store->LitColor[1].stride = 16; |
||
| 570 | } |
||
| 571 | else { |
||
| 572 | store->LitColor[0].stride = 0; |
||
| 573 | store->LitColor[1].stride = 0; |
||
| 574 | } |
||
| 575 | |||
| 576 | for (j = 0; j < nr; j++, STRIDE_F(normal,nstride)) { |
||
| 577 | |||
| 578 | GLfloat sum[2][3]; |
||
| 579 | |||
| 580 | #if IDX & LIGHT_MATERIAL |
||
| 581 | update_materials( ctx, store ); |
||
| 582 | |||
| 583 | sumA[0] = ctx->Light.Material.Attrib[MAT_ATTRIB_FRONT_DIFFUSE][3]; |
||
| 584 | #if IDX & LIGHT_TWOSIDE |
||
| 585 | sumA[1] = ctx->Light.Material.Attrib[MAT_ATTRIB_BACK_DIFFUSE][3]; |
||
| 586 | #endif |
||
| 587 | #endif |
||
| 588 | |||
| 589 | |||
| 590 | COPY_3V(sum[0], ctx->Light._BaseColor[0]); |
||
| 591 | #if IDX & LIGHT_TWOSIDE |
||
| 592 | COPY_3V(sum[1], ctx->Light._BaseColor[1]); |
||
| 593 | #endif |
||
| 594 | |||
| 595 | foreach (light, &ctx->Light.EnabledList) { |
||
| 596 | GLfloat n_dot_h, n_dot_VP, spec; |
||
| 597 | |||
| 598 | ACC_3V(sum[0], light->_MatAmbient[0]); |
||
| 599 | #if IDX & LIGHT_TWOSIDE |
||
| 600 | ACC_3V(sum[1], light->_MatAmbient[1]); |
||
| 601 | #endif |
||
| 602 | |||
| 603 | n_dot_VP = DOT3(normal, light->_VP_inf_norm); |
||
| 604 | |||
| 605 | if (n_dot_VP > 0.0F) { |
||
| 606 | ACC_SCALE_SCALAR_3V(sum[0], n_dot_VP, light->_MatDiffuse[0]); |
||
| 607 | n_dot_h = DOT3(normal, light->_h_inf_norm); |
||
| 608 | if (n_dot_h > 0.0F) { |
||
| 609 | struct gl_shine_tab *tab = ctx->_ShineTable[0]; |
||
| 610 | GET_SHINE_TAB_ENTRY( tab, n_dot_h, spec ); |
||
| 611 | ACC_SCALE_SCALAR_3V( sum[0], spec, light->_MatSpecular[0]); |
||
| 612 | } |
||
| 613 | } |
||
| 614 | #if IDX & LIGHT_TWOSIDE |
||
| 615 | else { |
||
| 616 | ACC_SCALE_SCALAR_3V(sum[1], -n_dot_VP, light->_MatDiffuse[1]); |
||
| 617 | n_dot_h = -DOT3(normal, light->_h_inf_norm); |
||
| 618 | if (n_dot_h > 0.0F) { |
||
| 619 | struct gl_shine_tab *tab = ctx->_ShineTable[1]; |
||
| 620 | GET_SHINE_TAB_ENTRY( tab, n_dot_h, spec ); |
||
| 621 | ACC_SCALE_SCALAR_3V( sum[1], spec, light->_MatSpecular[1]); |
||
| 622 | } |
||
| 623 | } |
||
| 624 | #endif |
||
| 625 | } |
||
| 626 | |||
| 627 | COPY_3V( Fcolor[j], sum[0] ); |
||
| 628 | Fcolor[j][3] = sumA[0]; |
||
| 629 | |||
| 630 | #if IDX & LIGHT_TWOSIDE |
||
| 631 | COPY_3V( Bcolor[j], sum[1] ); |
||
| 632 | Bcolor[j][3] = sumA[1]; |
||
| 633 | #endif |
||
| 634 | } |
||
| 635 | } |
||
| 636 | |||
| 637 | |||
| 638 | |||
| 639 | |||
| 640 | static void TAG(init_light_tab)( void ) |
||
| 641 | { |
||
| 642 | _tnl_light_tab[IDX] = TAG(light_rgba); |
||
| 643 | _tnl_light_fast_tab[IDX] = TAG(light_fast_rgba); |
||
| 644 | _tnl_light_fast_single_tab[IDX] = TAG(light_fast_rgba_single); |
||
| 645 | _tnl_light_spec_tab[IDX] = TAG(light_rgba_spec); |
||
| 646 | } |
||
| 647 | |||
| 648 | |||
| 649 | #undef TAG |
||
| 650 | #undef IDX |
||
| 651 | #undef NR_SIDES |