1 /* 2 * Mesa 3-D graphics library 3 * 4 * Copyright (C) 1999-2005 Brian Paul All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included 14 * in all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: 25 * Keith Whitwell <keithw (at) vmware.com> 26 */ 27 28 #include "main/mtypes.h" 29 #include "main/bufferobj.h" 30 #include "math/m_eval.h" 31 #include "vbo.h" 32 #include "vbo_context.h" 33 34 35 static GLuint 36 check_size(const GLfloat *attr) 37 { 38 if (attr[3] != 1.0F) 39 return 4; 40 if (attr[2] != 0.0F) 41 return 3; 42 if (attr[1] != 0.0F) 43 return 2; 44 return 1; 45 } 46 47 48 /** 49 * Helper for initializing a vertex array. 50 */ 51 static void 52 init_array(struct gl_context *ctx, struct gl_vertex_array *cl, 53 unsigned size, const void *pointer) 54 { 55 memset(cl, 0, sizeof(*cl)); 56 57 cl->Size = size; 58 cl->Type = GL_FLOAT; 59 cl->Format = GL_RGBA; 60 cl->StrideB = 0; 61 cl->_ElementSize = cl->Size * sizeof(GLfloat); 62 cl->Ptr = pointer; 63 64 _mesa_reference_buffer_object(ctx, &cl->BufferObj, 65 ctx->Shared->NullBufferObj); 66 } 67 68 69 /** 70 * Set up the vbo->currval arrays to point at the context's current 71 * vertex attributes (with strides = 0). 72 */ 73 static void 74 init_legacy_currval(struct gl_context *ctx) 75 { 76 struct vbo_context *vbo = vbo_context(ctx); 77 GLuint i; 78 79 /* Set up a constant (StrideB == 0) array for each current 80 * attribute: 81 */ 82 for (i = 0; i < VERT_ATTRIB_FF_MAX; i++) { 83 struct gl_vertex_array *cl = &vbo->currval[VERT_ATTRIB_FF(i)]; 84 85 init_array(ctx, cl, 86 check_size(ctx->Current.Attrib[i]), 87 ctx->Current.Attrib[i]); 88 } 89 } 90 91 92 static void 93 init_generic_currval(struct gl_context *ctx) 94 { 95 struct vbo_context *vbo = vbo_context(ctx); 96 GLuint i; 97 98 for (i = 0; i < VERT_ATTRIB_GENERIC_MAX; i++) { 99 struct gl_vertex_array *cl = &vbo->currval[VBO_ATTRIB_GENERIC0 + i]; 100 101 init_array(ctx, cl, 1, ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + i]); 102 } 103 } 104 105 106 static void 107 init_mat_currval(struct gl_context *ctx) 108 { 109 struct vbo_context *vbo = vbo_context(ctx); 110 GLuint i; 111 112 /* Set up a constant (StrideB == 0) array for each current 113 * attribute: 114 */ 115 for (i = 0; i < MAT_ATTRIB_MAX; i++) { 116 struct gl_vertex_array *cl = 117 &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT + i]; 118 unsigned size; 119 120 /* Size is fixed for the material attributes, for others will 121 * be determined at runtime: 122 */ 123 switch (i) { 124 case MAT_ATTRIB_FRONT_SHININESS: 125 case MAT_ATTRIB_BACK_SHININESS: 126 size = 1; 127 break; 128 case MAT_ATTRIB_FRONT_INDEXES: 129 case MAT_ATTRIB_BACK_INDEXES: 130 size = 3; 131 break; 132 default: 133 size = 4; 134 break; 135 } 136 137 init_array(ctx, cl, size, ctx->Light.Material.Attrib[i]); 138 } 139 } 140 141 static void 142 vbo_draw_indirect_prims(struct gl_context *ctx, 143 GLuint mode, 144 struct gl_buffer_object *indirect_data, 145 GLsizeiptr indirect_offset, 146 unsigned draw_count, 147 unsigned stride, 148 struct gl_buffer_object *indirect_params, 149 GLsizeiptr indirect_params_offset, 150 const struct _mesa_index_buffer *ib) 151 { 152 struct vbo_context *vbo = vbo_context(ctx); 153 struct _mesa_prim *prim; 154 GLsizei i; 155 156 prim = calloc(draw_count, sizeof(*prim)); 157 if (prim == NULL) { 158 _mesa_error(ctx, GL_OUT_OF_MEMORY, "gl%sDraw%sIndirect%s", 159 (draw_count > 1) ? "Multi" : "", 160 ib ? "Elements" : "Arrays", 161 indirect_params ? "CountARB" : ""); 162 return; 163 } 164 165 prim[0].begin = 1; 166 prim[draw_count - 1].end = 1; 167 for (i = 0; i < draw_count; ++i, indirect_offset += stride) { 168 prim[i].mode = mode; 169 prim[i].indexed = !!ib; 170 prim[i].indirect_offset = indirect_offset; 171 prim[i].is_indirect = 1; 172 prim[i].draw_id = i; 173 } 174 175 vbo->draw_prims(ctx, prim, draw_count, 176 ib, false, 0, ~0, 177 NULL, 0, 178 ctx->DrawIndirectBuffer); 179 180 free(prim); 181 } 182 183 184 GLboolean 185 _vbo_CreateContext(struct gl_context *ctx) 186 { 187 struct vbo_context *vbo = CALLOC_STRUCT(vbo_context); 188 189 ctx->vbo_context = vbo; 190 191 /* Initialize the arrayelt helper 192 */ 193 if (!ctx->aelt_context && 194 !_ae_create_context(ctx)) { 195 return GL_FALSE; 196 } 197 198 init_legacy_currval(ctx); 199 init_generic_currval(ctx); 200 init_mat_currval(ctx); 201 vbo_set_indirect_draw_func(ctx, vbo_draw_indirect_prims); 202 203 /* Build mappings from VERT_ATTRIB -> VBO_ATTRIB depending on type 204 * of vertex program active. 205 */ 206 { 207 GLuint i; 208 209 /* make sure all VBO_ATTRIB_ values can fit in an unsigned byte */ 210 STATIC_ASSERT(VBO_ATTRIB_MAX <= 255); 211 212 /* identity mapping */ 213 for (i = 0; i < ARRAY_SIZE(vbo->map_vp_none); i++) 214 vbo->map_vp_none[i] = i; 215 /* map material attribs to generic slots */ 216 for (i = 0; i < MAT_ATTRIB_MAX; i++) 217 vbo->map_vp_none[VERT_ATTRIB_GENERIC(i)] 218 = VBO_ATTRIB_MAT_FRONT_AMBIENT + i; 219 220 for (i = 0; i < ARRAY_SIZE(vbo->map_vp_arb); i++) 221 vbo->map_vp_arb[i] = i; 222 } 223 224 225 /* Hook our functions into exec and compile dispatch tables. These 226 * will pretty much be permanently installed, which means that the 227 * vtxfmt mechanism can be removed now. 228 */ 229 vbo_exec_init(ctx); 230 if (ctx->API == API_OPENGL_COMPAT) 231 vbo_save_init(ctx); 232 233 _math_init_eval(); 234 235 return GL_TRUE; 236 } 237 238 239 void 240 _vbo_DestroyContext(struct gl_context *ctx) 241 { 242 struct vbo_context *vbo = vbo_context(ctx); 243 244 if (ctx->aelt_context) { 245 _ae_destroy_context(ctx); 246 ctx->aelt_context = NULL; 247 } 248 249 if (vbo) { 250 GLuint i; 251 252 for (i = 0; i < VBO_ATTRIB_MAX; i++) { 253 _mesa_reference_buffer_object(ctx, &vbo->currval[i].BufferObj, NULL); 254 } 255 256 vbo_exec_destroy(ctx); 257 if (ctx->API == API_OPENGL_COMPAT) 258 vbo_save_destroy(ctx); 259 free(vbo); 260 ctx->vbo_context = NULL; 261 } 262 } 263 264 265 void 266 vbo_set_draw_func(struct gl_context *ctx, vbo_draw_func func) 267 { 268 struct vbo_context *vbo = vbo_context(ctx); 269 vbo->draw_prims = func; 270 } 271 272 273 void 274 vbo_set_indirect_draw_func(struct gl_context *ctx, 275 vbo_indirect_draw_func func) 276 { 277 struct vbo_context *vbo = vbo_context(ctx); 278 vbo->draw_indirect_prims = func; 279 } 280
