2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 * Keith Whitwell <keith@tungstengraphics.com>
28 #include "main/glheader.h"
29 #include "main/bufferobj.h"
30 #include "main/context.h"
31 #include "main/enums.h"
32 #include "main/state.h"
33 #include "main/macros.h"
35 #include "vbo_context.h"
38 static void vbo_exec_debug_verts( struct vbo_exec_context *exec )
40 GLuint count = exec->vtx.vert_count;
43 _mesa_printf("%s: %u vertices %d primitives, %d vertsize\n",
47 exec->vtx.vertex_size);
49 for (i = 0 ; i < exec->vtx.prim_count ; i++) {
50 struct _mesa_prim *prim = &exec->vtx.prim[i];
51 _mesa_printf(" prim %d: %s%s %d..%d %s %s\n",
53 _mesa_lookup_enum_by_nr(prim->mode),
54 prim->weak ? " (weak)" : "",
56 prim->start + prim->count,
57 prim->begin ? "BEGIN" : "(wrap)",
58 prim->end ? "END" : "(wrap)");
64 * NOTE: Need to have calculated primitives by this point -- do it on the fly.
65 * NOTE: Old 'parity' issue is gone.
67 static GLuint vbo_copy_vertices( struct vbo_exec_context *exec )
69 GLuint nr = exec->vtx.prim[exec->vtx.prim_count-1].count;
71 GLuint sz = exec->vtx.vertex_size;
72 GLfloat *dst = exec->vtx.copied.buffer;
73 GLfloat *src = ((GLfloat *)exec->vtx.buffer_map +
74 exec->vtx.prim[exec->vtx.prim_count-1].start *
75 exec->vtx.vertex_size);
78 switch( exec->ctx->Driver.CurrentExecPrimitive )
84 for (i = 0 ; i < ovf ; i++)
85 _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
89 for (i = 0 ; i < ovf ; i++)
90 _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
94 for (i = 0 ; i < ovf ; i++)
95 _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
101 _mesa_memcpy( dst, src+(nr-1)*sz, sz * sizeof(GLfloat) );
105 case GL_TRIANGLE_FAN:
110 _mesa_memcpy( dst, src+0, sz * sizeof(GLfloat) );
113 _mesa_memcpy( dst, src+0, sz * sizeof(GLfloat) );
114 _mesa_memcpy( dst+sz, src+(nr-1)*sz, sz * sizeof(GLfloat) );
117 case GL_TRIANGLE_STRIP:
118 /* no parity issue, but need to make sure the tri is not drawn twice */
120 exec->vtx.prim[exec->vtx.prim_count-1].count--;
125 case 0: ovf = 0; break;
126 case 1: ovf = 1; break;
127 default: ovf = 2 + (nr&1); break;
129 for (i = 0 ; i < ovf ; i++)
130 _mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
132 case PRIM_OUTSIDE_BEGIN_END:
142 /* TODO: populate these as the vertex is defined:
144 static void vbo_exec_bind_arrays( GLcontext *ctx )
146 struct vbo_context *vbo = vbo_context(ctx);
147 struct vbo_exec_context *exec = &vbo->exec;
148 struct gl_client_array *arrays = exec->vtx.arrays;
149 GLuint count = exec->vtx.vert_count;
150 GLubyte *data = exec->vtx.buffer_map;
153 GLbitfield varying_inputs = 0x0;
155 /* Install the default (ie Current) attributes first, then overlay
158 switch (get_program_mode(exec->ctx)) {
160 for (attr = 0; attr < 16; attr++) {
161 exec->vtx.inputs[attr] = &vbo->legacy_currval[attr];
163 for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
164 exec->vtx.inputs[attr + 16] = &vbo->mat_currval[attr];
166 map = vbo->map_vp_none;
170 /* The aliasing of attributes for NV vertex programs has already
171 * occurred. NV vertex programs cannot access material values,
172 * nor attributes greater than VERT_ATTRIB_TEX7.
174 for (attr = 0; attr < 16; attr++) {
175 exec->vtx.inputs[attr] = &vbo->legacy_currval[attr];
176 exec->vtx.inputs[attr + 16] = &vbo->generic_currval[attr];
178 map = vbo->map_vp_arb;
182 /* Make all active attributes (including edgeflag) available as
185 for (attr = 0; attr < VERT_ATTRIB_MAX ; attr++) {
186 const GLuint src = map[attr];
188 if (exec->vtx.attrsz[src]) {
189 /* override the default array set above */
190 exec->vtx.inputs[attr] = &arrays[attr];
192 if (exec->vtx.bufferobj->Name) {
193 /* a real buffer obj: Ptr is an offset, not a pointer*/
195 assert(exec->vtx.bufferobj->Pointer); /* buf should be mapped */
196 offset = (GLbyte *) data - (GLbyte *) exec->vtx.bufferobj->Pointer;
198 arrays[attr].Ptr = (void *) offset;
201 /* Ptr into ordinary app memory */
202 arrays[attr].Ptr = (void *) data;
204 arrays[attr].Size = exec->vtx.attrsz[src];
205 arrays[attr].StrideB = exec->vtx.vertex_size * sizeof(GLfloat);
206 arrays[attr].Stride = exec->vtx.vertex_size * sizeof(GLfloat);
207 arrays[attr].Type = GL_FLOAT;
208 arrays[attr].Enabled = 1;
209 _mesa_reference_buffer_object(ctx,
210 &arrays[attr].BufferObj,
211 exec->vtx.bufferobj);
212 arrays[attr]._MaxElement = count; /* ??? */
214 data += exec->vtx.attrsz[src] * sizeof(GLfloat);
215 varying_inputs |= 1<<attr;
219 _mesa_set_varying_vp_inputs( ctx, varying_inputs );
224 * Execute the buffer and save copied verts.
226 void vbo_exec_vtx_flush( struct vbo_exec_context *exec )
229 vbo_exec_debug_verts( exec );
232 if (exec->vtx.prim_count &&
233 exec->vtx.vert_count) {
235 exec->vtx.copied.nr = vbo_copy_vertices( exec );
237 if (exec->vtx.copied.nr != exec->vtx.vert_count) {
238 GLcontext *ctx = exec->ctx;
240 GLenum target = GL_ARRAY_BUFFER_ARB;
241 GLenum access = GL_READ_WRITE_ARB;
242 GLenum usage = GL_STREAM_DRAW_ARB;
243 GLsizei size = VBO_VERT_BUFFER_SIZE * sizeof(GLfloat);
245 /* Before the unmap (why?)
247 vbo_exec_bind_arrays( ctx );
250 _mesa_update_state( ctx );
252 /* if using a real VBO, unmap it before drawing */
253 if (exec->vtx.bufferobj->Name) {
254 ctx->Driver.UnmapBuffer(ctx, target, exec->vtx.bufferobj);
255 exec->vtx.buffer_map = NULL;
258 vbo_context(ctx)->draw_prims( ctx,
261 exec->vtx.prim_count,
264 exec->vtx.vert_count - 1);
266 /* If using a real VBO, get new storage */
267 if (exec->vtx.bufferobj->Name) {
268 ctx->Driver.BufferData(ctx, target, size, NULL, usage, exec->vtx.bufferobj);
269 exec->vtx.buffer_map =
270 ctx->Driver.MapBuffer(ctx, target, access, exec->vtx.bufferobj);
275 exec->vtx.prim_count = 0;
276 exec->vtx.vert_count = 0;
277 exec->vtx.vbptr = (GLfloat *)exec->vtx.buffer_map;