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1901 | serge | 1 | /* |
2 | * Mesa 3-D graphics library |
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3 | * Version: 6.5 |
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4 | * |
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5 | * Copyright (C) 1999-2006 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 | |||
25 | |||
26 | |||
27 | #include "main/glheader.h" |
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28 | #include "main/colormac.h" |
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29 | #include "main/light.h" |
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30 | #include "main/macros.h" |
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31 | #include "main/imports.h" |
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32 | #include "main/simple_list.h" |
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33 | #include "main/mtypes.h" |
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34 | |||
35 | #include "math/m_translate.h" |
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36 | |||
37 | #include "t_context.h" |
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38 | #include "t_pipeline.h" |
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39 | |||
40 | #define LIGHT_TWOSIDE 0x1 |
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41 | #define LIGHT_MATERIAL 0x2 |
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42 | #define MAX_LIGHT_FUNC 0x4 |
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43 | |||
44 | typedef void (*light_func)( struct gl_context *ctx, |
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45 | struct vertex_buffer *VB, |
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46 | struct tnl_pipeline_stage *stage, |
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47 | GLvector4f *input ); |
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48 | |||
49 | /** |
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50 | * Information for updating current material attributes from vertex color, |
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51 | * for GL_COLOR_MATERIAL. |
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52 | */ |
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53 | struct material_cursor { |
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54 | const GLfloat *ptr; /* points to src vertex color (in VB array) */ |
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55 | GLuint stride; /* stride to next vertex color (bytes) */ |
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56 | GLfloat *current; /* points to material attribute to update */ |
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57 | GLuint size; /* vertex/color size: 1, 2, 3 or 4 */ |
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58 | }; |
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59 | |||
60 | /** |
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61 | * Data private to this pipeline stage. |
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62 | */ |
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63 | struct light_stage_data { |
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64 | GLvector4f Input; |
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65 | GLvector4f LitColor[2]; |
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66 | GLvector4f LitSecondary[2]; |
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67 | light_func *light_func_tab; |
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68 | |||
69 | struct material_cursor mat[MAT_ATTRIB_MAX]; |
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70 | GLuint mat_count; |
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71 | GLuint mat_bitmask; |
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72 | }; |
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73 | |||
74 | |||
75 | #define LIGHT_STAGE_DATA(stage) ((struct light_stage_data *)(stage->privatePtr)) |
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76 | |||
77 | |||
78 | |||
79 | /** |
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80 | * In the case of colormaterial, the effected material attributes |
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81 | * should already have been bound to point to the incoming color data, |
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82 | * prior to running the pipeline. |
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83 | * This function copies the vertex's color to the material attributes |
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84 | * which are tracking glColor. |
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85 | * It's called per-vertex in the lighting loop. |
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86 | */ |
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87 | static void |
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88 | update_materials(struct gl_context *ctx, struct light_stage_data *store) |
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89 | { |
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90 | GLuint i; |
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91 | |||
92 | for (i = 0 ; i < store->mat_count ; i++) { |
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93 | /* update the material */ |
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94 | COPY_CLEAN_4V(store->mat[i].current, store->mat[i].size, store->mat[i].ptr); |
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95 | /* increment src vertex color pointer */ |
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96 | STRIDE_F(store->mat[i].ptr, store->mat[i].stride); |
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97 | } |
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98 | |||
99 | /* recompute derived light/material values */ |
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100 | _mesa_update_material( ctx, store->mat_bitmask ); |
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101 | /* XXX we should only call this if we're tracking/changing the specular |
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102 | * exponent. |
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103 | */ |
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104 | _mesa_validate_all_lighting_tables( ctx ); |
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105 | } |
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106 | |||
107 | |||
108 | /** |
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109 | * Prepare things prior to running the lighting stage. |
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110 | * Return number of material attributes which will track vertex color. |
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111 | */ |
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112 | static GLuint |
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113 | prepare_materials(struct gl_context *ctx, |
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114 | struct vertex_buffer *VB, struct light_stage_data *store) |
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115 | { |
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116 | GLuint i; |
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117 | |||
118 | store->mat_count = 0; |
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119 | store->mat_bitmask = 0; |
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120 | |||
121 | /* Examine the ColorMaterialBitmask to determine which materials |
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122 | * track vertex color. Override the material attribute's pointer |
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123 | * with the color pointer for each one. |
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124 | */ |
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125 | if (ctx->Light.ColorMaterialEnabled) { |
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126 | const GLuint bitmask = ctx->Light.ColorMaterialBitmask; |
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127 | for (i = 0 ; i < MAT_ATTRIB_MAX ; i++) |
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128 | if (bitmask & (1< |
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129 | VB->AttribPtr[_TNL_ATTRIB_MAT_FRONT_AMBIENT + i] = VB->AttribPtr[_TNL_ATTRIB_COLOR0]; |
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130 | } |
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131 | |||
132 | /* Now, for each material attribute that's tracking vertex color, save |
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133 | * some values (ptr, stride, size, current) that we'll need in |
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134 | * update_materials(), above, that'll actually copy the vertex color to |
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135 | * the material attribute(s). |
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136 | */ |
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137 | for (i = _TNL_FIRST_MAT; i <= _TNL_LAST_MAT; i++) { |
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138 | if (VB->AttribPtr[i]->stride) { |
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139 | const GLuint j = store->mat_count++; |
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140 | const GLuint attr = i - _TNL_ATTRIB_MAT_FRONT_AMBIENT; |
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141 | store->mat[j].ptr = VB->AttribPtr[i]->start; |
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142 | store->mat[j].stride = VB->AttribPtr[i]->stride; |
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143 | store->mat[j].size = VB->AttribPtr[i]->size; |
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144 | store->mat[j].current = ctx->Light.Material.Attrib[attr]; |
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145 | store->mat_bitmask |= (1< |
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146 | } |
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147 | } |
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148 | |||
149 | /* FIXME: Is this already done? |
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150 | */ |
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151 | _mesa_update_material( ctx, ~0 ); |
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152 | _mesa_validate_all_lighting_tables( ctx ); |
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153 | |||
154 | return store->mat_count; |
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155 | } |
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156 | |||
157 | /* Tables for all the shading functions. |
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158 | */ |
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159 | static light_func _tnl_light_tab[MAX_LIGHT_FUNC]; |
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160 | static light_func _tnl_light_fast_tab[MAX_LIGHT_FUNC]; |
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161 | static light_func _tnl_light_fast_single_tab[MAX_LIGHT_FUNC]; |
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162 | static light_func _tnl_light_spec_tab[MAX_LIGHT_FUNC]; |
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163 | |||
164 | #define TAG(x) x |
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165 | #define IDX (0) |
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166 | #include "t_vb_lighttmp.h" |
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167 | |||
168 | #define TAG(x) x##_twoside |
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169 | #define IDX (LIGHT_TWOSIDE) |
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170 | #include "t_vb_lighttmp.h" |
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171 | |||
172 | #define TAG(x) x##_material |
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173 | #define IDX (LIGHT_MATERIAL) |
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174 | #include "t_vb_lighttmp.h" |
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175 | |||
176 | #define TAG(x) x##_twoside_material |
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177 | #define IDX (LIGHT_TWOSIDE|LIGHT_MATERIAL) |
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178 | #include "t_vb_lighttmp.h" |
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179 | |||
180 | |||
181 | static void init_lighting_tables( void ) |
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182 | { |
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183 | static int done; |
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184 | |||
185 | if (!done) { |
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186 | init_light_tab(); |
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187 | init_light_tab_twoside(); |
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188 | init_light_tab_material(); |
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189 | init_light_tab_twoside_material(); |
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190 | done = 1; |
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191 | } |
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192 | } |
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193 | |||
194 | |||
195 | static GLboolean run_lighting( struct gl_context *ctx, |
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196 | struct tnl_pipeline_stage *stage ) |
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197 | { |
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198 | struct light_stage_data *store = LIGHT_STAGE_DATA(stage); |
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199 | TNLcontext *tnl = TNL_CONTEXT(ctx); |
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200 | struct vertex_buffer *VB = &tnl->vb; |
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201 | GLvector4f *input = ctx->_NeedEyeCoords ? VB->EyePtr : VB->AttribPtr[_TNL_ATTRIB_POS]; |
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202 | GLuint idx; |
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203 | |||
204 | if (!ctx->Light.Enabled || ctx->VertexProgram._Current) |
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205 | return GL_TRUE; |
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206 | |||
207 | /* Make sure we can talk about position x,y and z: |
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208 | */ |
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209 | if (input->size <= 2 && input == VB->AttribPtr[_TNL_ATTRIB_POS]) { |
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210 | |||
211 | _math_trans_4f( store->Input.data, |
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212 | VB->AttribPtr[_TNL_ATTRIB_POS]->data, |
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213 | VB->AttribPtr[_TNL_ATTRIB_POS]->stride, |
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214 | GL_FLOAT, |
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215 | VB->AttribPtr[_TNL_ATTRIB_POS]->size, |
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216 | 0, |
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217 | VB->Count ); |
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218 | |||
219 | if (input->size <= 2) { |
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220 | /* Clean z. |
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221 | */ |
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222 | _mesa_vector4f_clean_elem(&store->Input, VB->Count, 2); |
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223 | } |
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224 | |||
225 | if (input->size <= 1) { |
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226 | /* Clean y. |
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227 | */ |
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228 | _mesa_vector4f_clean_elem(&store->Input, VB->Count, 1); |
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229 | } |
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230 | |||
231 | input = &store->Input; |
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232 | } |
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233 | |||
234 | idx = 0; |
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235 | |||
236 | if (prepare_materials( ctx, VB, store )) |
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237 | idx |= LIGHT_MATERIAL; |
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238 | |||
239 | if (ctx->Light.Model.TwoSide) |
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240 | idx |= LIGHT_TWOSIDE; |
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241 | |||
242 | /* The individual functions know about replaying side-effects |
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243 | * vs. full re-execution. |
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244 | */ |
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245 | store->light_func_tab[idx]( ctx, VB, stage, input ); |
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246 | |||
247 | return GL_TRUE; |
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248 | } |
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249 | |||
250 | |||
251 | /* Called in place of do_lighting when the light table may have changed. |
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252 | */ |
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253 | static void validate_lighting( struct gl_context *ctx, |
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254 | struct tnl_pipeline_stage *stage ) |
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255 | { |
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256 | light_func *tab; |
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257 | |||
258 | if (!ctx->Light.Enabled || ctx->VertexProgram._Current) |
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259 | return; |
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260 | |||
261 | if (ctx->Light._NeedVertices) { |
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262 | if (ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR) |
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263 | tab = _tnl_light_spec_tab; |
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264 | else |
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265 | tab = _tnl_light_tab; |
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266 | } |
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267 | else { |
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268 | if (ctx->Light.EnabledList.next == ctx->Light.EnabledList.prev) |
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269 | tab = _tnl_light_fast_single_tab; |
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270 | else |
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271 | tab = _tnl_light_fast_tab; |
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272 | } |
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273 | |||
274 | |||
275 | LIGHT_STAGE_DATA(stage)->light_func_tab = tab; |
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276 | |||
277 | /* This and the above should only be done on _NEW_LIGHT: |
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278 | */ |
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279 | TNL_CONTEXT(ctx)->Driver.NotifyMaterialChange( ctx ); |
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280 | } |
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281 | |||
282 | |||
283 | |||
284 | /* Called the first time stage->run is called. In effect, don't |
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285 | * allocate data until the first time the stage is run. |
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286 | */ |
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287 | static GLboolean init_lighting( struct gl_context *ctx, |
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288 | struct tnl_pipeline_stage *stage ) |
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289 | { |
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290 | TNLcontext *tnl = TNL_CONTEXT(ctx); |
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291 | struct light_stage_data *store; |
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292 | GLuint size = tnl->vb.Size; |
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293 | |||
294 | stage->privatePtr = MALLOC(sizeof(*store)); |
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295 | store = LIGHT_STAGE_DATA(stage); |
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296 | if (!store) |
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297 | return GL_FALSE; |
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298 | |||
299 | /* Do onetime init. |
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300 | */ |
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301 | init_lighting_tables(); |
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302 | |||
303 | _mesa_vector4f_alloc( &store->Input, 0, size, 32 ); |
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304 | _mesa_vector4f_alloc( &store->LitColor[0], 0, size, 32 ); |
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305 | _mesa_vector4f_alloc( &store->LitColor[1], 0, size, 32 ); |
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306 | _mesa_vector4f_alloc( &store->LitSecondary[0], 0, size, 32 ); |
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307 | _mesa_vector4f_alloc( &store->LitSecondary[1], 0, size, 32 ); |
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308 | |||
309 | store->LitColor[0].size = 4; |
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310 | store->LitColor[1].size = 4; |
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311 | store->LitSecondary[0].size = 3; |
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312 | store->LitSecondary[1].size = 3; |
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313 | |||
314 | return GL_TRUE; |
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315 | } |
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316 | |||
317 | |||
318 | |||
319 | |||
320 | static void dtr( struct tnl_pipeline_stage *stage ) |
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321 | { |
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322 | struct light_stage_data *store = LIGHT_STAGE_DATA(stage); |
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323 | |||
324 | if (store) { |
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325 | _mesa_vector4f_free( &store->Input ); |
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326 | _mesa_vector4f_free( &store->LitColor[0] ); |
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327 | _mesa_vector4f_free( &store->LitColor[1] ); |
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328 | _mesa_vector4f_free( &store->LitSecondary[0] ); |
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329 | _mesa_vector4f_free( &store->LitSecondary[1] ); |
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330 | FREE( store ); |
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331 | stage->privatePtr = NULL; |
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332 | } |
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333 | } |
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334 | |||
335 | const struct tnl_pipeline_stage _tnl_lighting_stage = |
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336 | { |
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337 | "lighting", /* name */ |
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338 | NULL, /* private_data */ |
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339 | init_lighting, |
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340 | dtr, /* destroy */ |
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341 | validate_lighting, |
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342 | run_lighting |
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343 | };=>=>=> |