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@vmware.com>
26 */
27
28 #include "main/imports.h"
29 #include "main/mtypes.h"
30 #include "main/api_arrayelt.h"
31 #include "main/bufferobj.h"
32 #include "math/m_eval.h"
33 #include "vbo.h"
34 #include "vbo_context.h"
35
36
check_size(const GLfloat * attr)37 static GLuint check_size( const GLfloat *attr )
38 {
39 if (attr[3] != 1.0F) return 4;
40 if (attr[2] != 0.0F) return 3;
41 if (attr[1] != 0.0F) return 2;
42 return 1;
43 }
44
45
46 /**
47 * Helper for initializing a vertex array.
48 */
49 static void
init_array(struct gl_context * ctx,struct gl_vertex_array * cl,unsigned size,const void * pointer)50 init_array(struct gl_context *ctx, struct gl_vertex_array *cl,
51 unsigned size, const void *pointer)
52 {
53 memset(cl, 0, sizeof(*cl));
54
55 cl->Size = size;
56 cl->Type = GL_FLOAT;
57 cl->Format = GL_RGBA;
58 cl->StrideB = 0;
59 cl->_ElementSize = cl->Size * sizeof(GLfloat);
60 cl->Ptr = pointer;
61
62 _mesa_reference_buffer_object(ctx, &cl->BufferObj,
63 ctx->Shared->NullBufferObj);
64 }
65
66
67 /**
68 * Set up the vbo->currval arrays to point at the context's current
69 * vertex attributes (with strides = 0).
70 */
init_legacy_currval(struct gl_context * ctx)71 static void init_legacy_currval(struct gl_context *ctx)
72 {
73 struct vbo_context *vbo = vbo_context(ctx);
74 GLuint i;
75
76 /* Set up a constant (StrideB == 0) array for each current
77 * attribute:
78 */
79 for (i = 0; i < VERT_ATTRIB_FF_MAX; i++) {
80 struct gl_vertex_array *cl = &vbo->currval[VERT_ATTRIB_FF(i)];
81
82 init_array(ctx, cl,
83 check_size(ctx->Current.Attrib[i]),
84 ctx->Current.Attrib[i]);
85 }
86 }
87
88
init_generic_currval(struct gl_context * ctx)89 static void init_generic_currval(struct gl_context *ctx)
90 {
91 struct vbo_context *vbo = vbo_context(ctx);
92 GLuint i;
93
94 for (i = 0; i < VERT_ATTRIB_GENERIC_MAX; i++) {
95 struct gl_vertex_array *cl = &vbo->currval[VBO_ATTRIB_GENERIC0 + i];
96
97 init_array(ctx, cl, 1, ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + i]);
98 }
99 }
100
101
init_mat_currval(struct gl_context * ctx)102 static void init_mat_currval(struct gl_context *ctx)
103 {
104 struct vbo_context *vbo = vbo_context(ctx);
105 GLuint i;
106
107 /* Set up a constant (StrideB == 0) array for each current
108 * attribute:
109 */
110 for (i = 0; i < MAT_ATTRIB_MAX; i++) {
111 struct gl_vertex_array *cl =
112 &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT + i];
113 unsigned size;
114
115 /* Size is fixed for the material attributes, for others will
116 * be determined at runtime:
117 */
118 switch (i) {
119 case MAT_ATTRIB_FRONT_SHININESS:
120 case MAT_ATTRIB_BACK_SHININESS:
121 size = 1;
122 break;
123 case MAT_ATTRIB_FRONT_INDEXES:
124 case MAT_ATTRIB_BACK_INDEXES:
125 size = 3;
126 break;
127 default:
128 size = 4;
129 break;
130 }
131
132 init_array(ctx, cl, size, ctx->Light.Material.Attrib[i]);
133 }
134 }
135
136 static void
vbo_draw_indirect_prims(struct gl_context * ctx,GLuint mode,struct gl_buffer_object * indirect_data,GLsizeiptr indirect_offset,unsigned draw_count,unsigned stride,struct gl_buffer_object * indirect_params,GLsizeiptr indirect_params_offset,const struct _mesa_index_buffer * ib)137 vbo_draw_indirect_prims(struct gl_context *ctx,
138 GLuint mode,
139 struct gl_buffer_object *indirect_data,
140 GLsizeiptr indirect_offset,
141 unsigned draw_count,
142 unsigned stride,
143 struct gl_buffer_object *indirect_params,
144 GLsizeiptr indirect_params_offset,
145 const struct _mesa_index_buffer *ib)
146 {
147 struct vbo_context *vbo = vbo_context(ctx);
148 struct _mesa_prim *prim;
149 GLsizei i;
150
151 prim = calloc(draw_count, sizeof(*prim));
152 if (prim == NULL) {
153 _mesa_error(ctx, GL_OUT_OF_MEMORY, "gl%sDraw%sIndirect%s",
154 (draw_count > 1) ? "Multi" : "",
155 ib ? "Elements" : "Arrays",
156 indirect_params ? "CountARB" : "");
157 return;
158 }
159
160 prim[0].begin = 1;
161 prim[draw_count - 1].end = 1;
162 for (i = 0; i < draw_count; ++i, indirect_offset += stride) {
163 prim[i].mode = mode;
164 prim[i].indexed = !!ib;
165 prim[i].indirect_offset = indirect_offset;
166 prim[i].is_indirect = 1;
167 prim[i].draw_id = i;
168 }
169
170 vbo->draw_prims(ctx, prim, draw_count,
171 ib, false, ~0, ~0,
172 NULL, 0,
173 ctx->DrawIndirectBuffer);
174
175 free(prim);
176 }
177
178
_vbo_CreateContext(struct gl_context * ctx)179 GLboolean _vbo_CreateContext( struct gl_context *ctx )
180 {
181 struct vbo_context *vbo = CALLOC_STRUCT(vbo_context);
182
183 ctx->vbo_context = vbo;
184
185 /* Initialize the arrayelt helper
186 */
187 if (!ctx->aelt_context &&
188 !_ae_create_context( ctx )) {
189 return GL_FALSE;
190 }
191
192 init_legacy_currval( ctx );
193 init_generic_currval( ctx );
194 init_mat_currval( ctx );
195 vbo_set_indirect_draw_func(ctx, vbo_draw_indirect_prims);
196
197 /* Build mappings from VERT_ATTRIB -> VBO_ATTRIB depending on type
198 * of vertex program active.
199 */
200 {
201 GLuint i;
202
203 /* identity mapping */
204 for (i = 0; i < ARRAY_SIZE(vbo->map_vp_none); i++)
205 vbo->map_vp_none[i] = i;
206 /* map material attribs to generic slots */
207 for (i = 0; i < MAT_ATTRIB_MAX; i++)
208 vbo->map_vp_none[VERT_ATTRIB_GENERIC(i)]
209 = VBO_ATTRIB_MAT_FRONT_AMBIENT + i;
210
211 for (i = 0; i < ARRAY_SIZE(vbo->map_vp_arb); i++)
212 vbo->map_vp_arb[i] = i;
213 }
214
215
216 /* Hook our functions into exec and compile dispatch tables. These
217 * will pretty much be permanently installed, which means that the
218 * vtxfmt mechanism can be removed now.
219 */
220 vbo_exec_init( ctx );
221 if (ctx->API == API_OPENGL_COMPAT)
222 vbo_save_init( ctx );
223
224 _math_init_eval();
225
226 return GL_TRUE;
227 }
228
229
_vbo_InvalidateState(struct gl_context * ctx,GLbitfield new_state)230 void _vbo_InvalidateState( struct gl_context *ctx, GLbitfield new_state )
231 {
232 vbo_exec_invalidate_state(ctx, new_state);
233 }
234
235
_vbo_DestroyContext(struct gl_context * ctx)236 void _vbo_DestroyContext( struct gl_context *ctx )
237 {
238 struct vbo_context *vbo = vbo_context(ctx);
239
240 if (ctx->aelt_context) {
241 _ae_destroy_context( ctx );
242 ctx->aelt_context = NULL;
243 }
244
245 if (vbo) {
246 GLuint i;
247
248 for (i = 0; i < VBO_ATTRIB_MAX; i++) {
249 _mesa_reference_buffer_object(ctx, &vbo->currval[i].BufferObj, NULL);
250 }
251
252 vbo_exec_destroy(ctx);
253 if (ctx->API == API_OPENGL_COMPAT)
254 vbo_save_destroy(ctx);
255 free(vbo);
256 ctx->vbo_context = NULL;
257 }
258 }
259
260
vbo_set_draw_func(struct gl_context * ctx,vbo_draw_func func)261 void vbo_set_draw_func(struct gl_context *ctx, vbo_draw_func func)
262 {
263 struct vbo_context *vbo = vbo_context(ctx);
264 vbo->draw_prims = func;
265 }
266
267
vbo_set_indirect_draw_func(struct gl_context * ctx,vbo_indirect_draw_func func)268 void vbo_set_indirect_draw_func(struct gl_context *ctx,
269 vbo_indirect_draw_func func)
270 {
271 struct vbo_context *vbo = vbo_context(ctx);
272 vbo->draw_indirect_prims = func;
273 }
274