1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008 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
25 /* Author:
26 * Keith Whitwell <keithw@vmware.com>
27 */
28
29 #include "main/glheader.h"
30 #include "main/bufferobj.h"
31 #include "main/context.h"
32 #include "main/imports.h"
33 #include "main/mtypes.h"
34 #include "main/macros.h"
35 #include "main/light.h"
36 #include "main/state.h"
37 #include "util/bitscan.h"
38
39 #include "vbo_context.h"
40
41
42 /**
43 * After playback, copy everything but the position from the
44 * last vertex to the saved state
45 */
46 static void
playback_copy_to_current(struct gl_context * ctx,const struct vbo_save_vertex_list * node)47 playback_copy_to_current(struct gl_context *ctx,
48 const struct vbo_save_vertex_list *node)
49 {
50 struct vbo_context *vbo = vbo_context(ctx);
51 fi_type vertex[VBO_ATTRIB_MAX * 4];
52 fi_type *data;
53 GLbitfield64 mask;
54
55 if (node->current_size == 0)
56 return;
57
58 if (node->current_data) {
59 data = node->current_data;
60 }
61 else {
62 /* Position of last vertex */
63 const GLuint pos = node->vertex_count > 0 ? node->vertex_count - 1 : 0;
64 /* Offset to last vertex in the vertex buffer */
65 const GLuint offset = node->buffer_offset
66 + pos * node->vertex_size * sizeof(GLfloat);
67
68 data = vertex;
69
70 ctx->Driver.GetBufferSubData(ctx, offset,
71 node->vertex_size * sizeof(GLfloat),
72 data, node->vertex_store->bufferobj);
73
74 data += node->attrsz[0]; /* skip vertex position */
75 }
76
77 mask = node->enabled & (~BITFIELD64_BIT(VBO_ATTRIB_POS));
78 while (mask) {
79 const int i = u_bit_scan64(&mask);
80 fi_type *current = (fi_type *)vbo->currval[i].Ptr;
81 fi_type tmp[4];
82 assert(node->attrsz[i]);
83
84 COPY_CLEAN_4V_TYPE_AS_UNION(tmp,
85 node->attrsz[i],
86 data,
87 node->attrtype[i]);
88
89 if (node->attrtype[i] != vbo->currval[i].Type ||
90 memcmp(current, tmp, 4 * sizeof(GLfloat)) != 0) {
91 memcpy(current, tmp, 4 * sizeof(GLfloat));
92
93 vbo->currval[i].Size = node->attrsz[i];
94 vbo->currval[i]._ElementSize = vbo->currval[i].Size * sizeof(GLfloat);
95 vbo->currval[i].Type = node->attrtype[i];
96 vbo->currval[i].Integer =
97 vbo_attrtype_to_integer_flag(node->attrtype[i]);
98
99 if (i >= VBO_ATTRIB_FIRST_MATERIAL &&
100 i <= VBO_ATTRIB_LAST_MATERIAL)
101 ctx->NewState |= _NEW_LIGHT;
102
103 ctx->NewState |= _NEW_CURRENT_ATTRIB;
104 }
105
106 data += node->attrsz[i];
107 }
108
109 /* Colormaterial -- this kindof sucks.
110 */
111 if (ctx->Light.ColorMaterialEnabled) {
112 _mesa_update_color_material(ctx, ctx->Current.Attrib[VBO_ATTRIB_COLOR0]);
113 }
114
115 /* CurrentExecPrimitive
116 */
117 if (node->prim_count) {
118 const struct _mesa_prim *prim = &node->prims[node->prim_count - 1];
119 if (prim->end)
120 ctx->Driver.CurrentExecPrimitive = PRIM_OUTSIDE_BEGIN_END;
121 else
122 ctx->Driver.CurrentExecPrimitive = prim->mode;
123 }
124 }
125
126
127
128 /**
129 * Treat the vertex storage as a VBO, define vertex arrays pointing
130 * into it:
131 */
132 static void
bind_vertex_list(struct gl_context * ctx,const struct vbo_save_vertex_list * node)133 bind_vertex_list(struct gl_context *ctx,
134 const struct vbo_save_vertex_list *node)
135 {
136 struct vbo_context *vbo = vbo_context(ctx);
137 struct vbo_save_context *save = &vbo->save;
138 struct gl_vertex_array *arrays = save->arrays;
139 GLuint buffer_offset = node->buffer_offset;
140 const GLubyte *map;
141 GLuint attr;
142 GLubyte node_attrsz[VBO_ATTRIB_MAX]; /* copy of node->attrsz[] */
143 GLenum node_attrtype[VBO_ATTRIB_MAX]; /* copy of node->attrtype[] */
144 GLbitfield varying_inputs = 0x0;
145
146 memcpy(node_attrsz, node->attrsz, sizeof(node->attrsz));
147 memcpy(node_attrtype, node->attrtype, sizeof(node->attrtype));
148
149 if (aligned_vertex_buffer_offset(node)) {
150 /* The vertex size is an exact multiple of the buffer offset.
151 * This means that we can use zero-based vertex attribute pointers
152 * and specify the start of the primitive with the _mesa_prim::start
153 * field. This results in issuing several draw calls with identical
154 * vertex attribute information. This can result in fewer state
155 * changes in drivers. In particular, the Gallium CSO module will
156 * filter out redundant vertex buffer changes.
157 */
158 buffer_offset = 0;
159 }
160
161 /* Install the default (ie Current) attributes first */
162 for (attr = 0; attr < VERT_ATTRIB_FF_MAX; attr++) {
163 save->inputs[attr] = &vbo->currval[VBO_ATTRIB_POS + attr];
164 }
165
166 /* Overlay other active attributes */
167 switch (get_program_mode(ctx)) {
168 case VP_NONE:
169 for (attr = 0; attr < MAT_ATTRIB_MAX; attr++) {
170 save->inputs[VERT_ATTRIB_GENERIC(attr)] =
171 &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT+attr];
172 }
173 map = vbo->map_vp_none;
174 break;
175 case VP_ARB:
176 for (attr = 0; attr < VERT_ATTRIB_GENERIC_MAX; attr++) {
177 save->inputs[VERT_ATTRIB_GENERIC(attr)] =
178 &vbo->currval[VBO_ATTRIB_GENERIC0+attr];
179 }
180 map = vbo->map_vp_arb;
181
182 /* check if VERT_ATTRIB_POS is not read but VERT_BIT_GENERIC0 is read.
183 * In that case we effectively need to route the data from
184 * glVertexAttrib(0, val) calls to feed into the GENERIC0 input.
185 */
186 const GLbitfield64 inputs_read =
187 ctx->VertexProgram._Current->info.inputs_read;
188 if ((inputs_read & VERT_BIT_POS) == 0 &&
189 (inputs_read & VERT_BIT_GENERIC0)) {
190 save->inputs[VERT_ATTRIB_GENERIC0] = save->inputs[0];
191 node_attrsz[VERT_ATTRIB_GENERIC0] = node_attrsz[0];
192 node_attrtype[VERT_ATTRIB_GENERIC0] = node_attrtype[0];
193 node_attrsz[0] = 0;
194 }
195 break;
196 default:
197 assert(0);
198 }
199
200 for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
201 const GLuint src = map[attr];
202
203 if (node_attrsz[src]) {
204 struct gl_vertex_array *array = &arrays[attr];
205
206 /* override the default array set above */
207 save->inputs[attr] = array;
208
209 array->Ptr = (const GLubyte *) NULL + buffer_offset;
210 array->Size = node_attrsz[src];
211 array->StrideB = node->vertex_size * sizeof(GLfloat);
212 array->Type = node_attrtype[src];
213 array->Integer = vbo_attrtype_to_integer_flag(node_attrtype[src]);
214 array->Format = GL_RGBA;
215 array->_ElementSize = array->Size * sizeof(GLfloat);
216 _mesa_reference_buffer_object(ctx,
217 &array->BufferObj,
218 node->vertex_store->bufferobj);
219
220 assert(array->BufferObj->Name);
221
222 buffer_offset += node_attrsz[src] * sizeof(GLfloat);
223 varying_inputs |= VERT_BIT(attr);
224 }
225 }
226
227 _mesa_set_varying_vp_inputs(ctx, varying_inputs);
228 ctx->NewDriverState |= ctx->DriverFlags.NewArray;
229 }
230
231
232 static void
loopback_vertex_list(struct gl_context * ctx,const struct vbo_save_vertex_list * list)233 loopback_vertex_list(struct gl_context *ctx,
234 const struct vbo_save_vertex_list *list)
235 {
236 const char *buffer =
237 ctx->Driver.MapBufferRange(ctx, 0,
238 list->vertex_store->bufferobj->Size,
239 GL_MAP_READ_BIT, /* ? */
240 list->vertex_store->bufferobj,
241 MAP_INTERNAL);
242
243 unsigned buffer_offset =
244 aligned_vertex_buffer_offset(list) ? 0 : list->buffer_offset;
245
246 vbo_loopback_vertex_list(ctx,
247 (const GLfloat *) (buffer + buffer_offset),
248 list->attrsz,
249 list->prims,
250 list->prim_count,
251 list->wrap_count,
252 list->vertex_size);
253
254 ctx->Driver.UnmapBuffer(ctx, list->vertex_store->bufferobj,
255 MAP_INTERNAL);
256 }
257
258
259 /**
260 * Execute the buffer and save copied verts.
261 * This is called from the display list code when executing
262 * a drawing command.
263 */
264 void
vbo_save_playback_vertex_list(struct gl_context * ctx,void * data)265 vbo_save_playback_vertex_list(struct gl_context *ctx, void *data)
266 {
267 const struct vbo_save_vertex_list *node =
268 (const struct vbo_save_vertex_list *) data;
269 struct vbo_save_context *save = &vbo_context(ctx)->save;
270 GLboolean remap_vertex_store = GL_FALSE;
271
272 if (save->vertex_store && save->vertex_store->buffer_map) {
273 /* The vertex store is currently mapped but we're about to replay
274 * a display list. This can happen when a nested display list is
275 * being build with GL_COMPILE_AND_EXECUTE.
276 * We never want to have mapped vertex buffers when we're drawing.
277 * Unmap the vertex store, execute the list, then remap the vertex
278 * store.
279 */
280 vbo_save_unmap_vertex_store(ctx, save->vertex_store);
281 remap_vertex_store = GL_TRUE;
282 }
283
284 FLUSH_CURRENT(ctx, 0);
285
286 if (node->prim_count > 0) {
287
288 if (_mesa_inside_begin_end(ctx) && node->prims[0].begin) {
289 /* Error: we're about to begin a new primitive but we're already
290 * inside a glBegin/End pair.
291 */
292 _mesa_error(ctx, GL_INVALID_OPERATION,
293 "draw operation inside glBegin/End");
294 goto end;
295 }
296 else if (save->replay_flags) {
297 /* Various degenerate cases: translate into immediate mode
298 * calls rather than trying to execute in place.
299 */
300 loopback_vertex_list(ctx, node);
301
302 goto end;
303 }
304
305 if (ctx->NewState)
306 _mesa_update_state(ctx);
307
308 /* XXX also need to check if shader enabled, but invalid */
309 if ((ctx->VertexProgram.Enabled &&
310 !_mesa_arb_vertex_program_enabled(ctx)) ||
311 (ctx->FragmentProgram.Enabled &&
312 !_mesa_arb_fragment_program_enabled(ctx))) {
313 _mesa_error(ctx, GL_INVALID_OPERATION,
314 "glBegin (invalid vertex/fragment program)");
315 return;
316 }
317
318 bind_vertex_list(ctx, node);
319
320 vbo_draw_method(vbo_context(ctx), DRAW_DISPLAY_LIST);
321
322 /* Again...
323 */
324 if (ctx->NewState)
325 _mesa_update_state(ctx);
326
327 if (node->vertex_count > 0) {
328 GLuint min_index = node->start_vertex;
329 GLuint max_index = min_index + node->vertex_count - 1;
330 vbo_context(ctx)->draw_prims(ctx,
331 node->prims,
332 node->prim_count,
333 NULL,
334 GL_TRUE,
335 min_index, max_index,
336 NULL, 0, NULL);
337 }
338 }
339
340 /* Copy to current?
341 */
342 playback_copy_to_current(ctx, node);
343
344 end:
345 if (remap_vertex_store) {
346 save->buffer_ptr = vbo_save_map_vertex_store(ctx, save->vertex_store);
347 }
348 }
349