1 /**************************************************************************
2 *
3 * Copyright 2007 VMware, Inc.
4 * 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
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28 #include "main/imports.h"
29 #include "main/image.h"
30 #include "main/macros.h"
31
32 #include "vbo/vbo.h"
33
34 #include "st_context.h"
35 #include "st_atom.h"
36 #include "st_cb_bitmap.h"
37 #include "st_cb_bufferobjects.h"
38 #include "st_draw.h"
39 #include "st_program.h"
40
41 #include "pipe/p_context.h"
42 #include "pipe/p_defines.h"
43 #include "util/u_inlines.h"
44 #include "util/u_draw.h"
45
46 #include "draw/draw_private.h"
47 #include "draw/draw_context.h"
48
49
50 /**
51 * Set the (private) draw module's post-transformed vertex format when in
52 * GL_SELECT or GL_FEEDBACK mode or for glRasterPos.
53 */
54 static void
set_feedback_vertex_format(struct gl_context * ctx)55 set_feedback_vertex_format(struct gl_context *ctx)
56 {
57 #if 0
58 struct st_context *st = st_context(ctx);
59 struct vertex_info vinfo;
60 GLuint i;
61
62 memset(&vinfo, 0, sizeof(vinfo));
63
64 if (ctx->RenderMode == GL_SELECT) {
65 assert(ctx->RenderMode == GL_SELECT);
66 vinfo.num_attribs = 1;
67 vinfo.format[0] = FORMAT_4F;
68 vinfo.interp_mode[0] = INTERP_LINEAR;
69 }
70 else {
71 /* GL_FEEDBACK, or glRasterPos */
72 /* emit all attribs (pos, color, texcoord) as GLfloat[4] */
73 vinfo.num_attribs = st->state.vs->cso->state.num_outputs;
74 for (i = 0; i < vinfo.num_attribs; i++) {
75 vinfo.format[i] = FORMAT_4F;
76 vinfo.interp_mode[i] = INTERP_LINEAR;
77 }
78 }
79
80 draw_set_vertex_info(st->draw, &vinfo);
81 #endif
82 }
83
84
85 /**
86 * Helper for drawing current vertex arrays.
87 */
88 static void
draw_arrays(struct draw_context * draw,unsigned mode,unsigned start,unsigned count)89 draw_arrays(struct draw_context *draw, unsigned mode,
90 unsigned start, unsigned count)
91 {
92 struct pipe_draw_info info;
93
94 util_draw_init_info(&info);
95
96 info.mode = mode;
97 info.start = start;
98 info.count = count;
99 info.min_index = start;
100 info.max_index = start + count - 1;
101
102 draw_vbo(draw, &info);
103 }
104
105
106 /**
107 * Called by VBO to draw arrays when in selection or feedback mode and
108 * to implement glRasterPos.
109 * This is very much like the normal draw_vbo() function above.
110 * Look at code refactoring some day.
111 */
112 void
st_feedback_draw_vbo(struct gl_context * ctx,const struct _mesa_prim * prims,GLuint nr_prims,const struct _mesa_index_buffer * ib,GLboolean index_bounds_valid,GLuint min_index,GLuint max_index,struct gl_transform_feedback_object * tfb_vertcount,unsigned stream,struct gl_buffer_object * indirect)113 st_feedback_draw_vbo(struct gl_context *ctx,
114 const struct _mesa_prim *prims,
115 GLuint nr_prims,
116 const struct _mesa_index_buffer *ib,
117 GLboolean index_bounds_valid,
118 GLuint min_index,
119 GLuint max_index,
120 struct gl_transform_feedback_object *tfb_vertcount,
121 unsigned stream,
122 struct gl_buffer_object *indirect)
123 {
124 struct st_context *st = st_context(ctx);
125 struct pipe_context *pipe = st->pipe;
126 struct draw_context *draw = st_get_draw_context(st);
127 const struct st_vertex_program *vp;
128 const struct pipe_shader_state *vs;
129 struct pipe_vertex_buffer vbuffers[PIPE_MAX_SHADER_INPUTS];
130 struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
131 struct pipe_index_buffer ibuffer;
132 struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS] = {NULL};
133 struct pipe_transfer *ib_transfer = NULL;
134 const struct gl_vertex_array **arrays = ctx->Array._DrawArrays;
135 GLuint attr, i;
136 const GLubyte *low_addr = NULL;
137 const void *mapped_indices = NULL;
138
139 if (!draw)
140 return;
141
142 st_flush_bitmap_cache(st);
143 st_invalidate_readpix_cache(st);
144
145 st_validate_state(st, ST_PIPELINE_RENDER);
146
147 if (!index_bounds_valid)
148 vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index, nr_prims);
149
150 /* must get these after state validation! */
151 vp = st->vp;
152 vs = &st->vp_variant->tgsi;
153
154 if (!st->vp_variant->draw_shader) {
155 st->vp_variant->draw_shader = draw_create_vertex_shader(draw, vs);
156 }
157
158 /*
159 * Set up the draw module's state.
160 *
161 * We'd like to do this less frequently, but the normal state-update
162 * code sends state updates to the pipe, not to our private draw module.
163 */
164 assert(draw);
165 draw_set_viewport_states(draw, 0, 1, &st->state.viewport[0]);
166 draw_set_clip_state(draw, &st->state.clip);
167 draw_set_rasterizer_state(draw, &st->state.rasterizer, NULL);
168 draw_bind_vertex_shader(draw, st->vp_variant->draw_shader);
169 set_feedback_vertex_format(ctx);
170
171 /* Find the lowest address of the arrays we're drawing */
172 if (vp->num_inputs) {
173 low_addr = arrays[vp->index_to_input[0]]->Ptr;
174
175 for (attr = 1; attr < vp->num_inputs; attr++) {
176 const GLubyte *start = arrays[vp->index_to_input[attr]]->Ptr;
177 low_addr = MIN2(low_addr, start);
178 }
179 }
180
181 /* loop over TGSI shader inputs to determine vertex buffer
182 * and attribute info
183 */
184 for (attr = 0; attr < vp->num_inputs; attr++) {
185 const GLuint mesaAttr = vp->index_to_input[attr];
186 struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
187 void *map;
188
189 if (bufobj && bufobj->Name) {
190 /* Attribute data is in a VBO.
191 * Recall that for VBOs, the gl_vertex_array->Ptr field is
192 * really an offset from the start of the VBO, not a pointer.
193 */
194 struct st_buffer_object *stobj = st_buffer_object(bufobj);
195 assert(stobj->buffer);
196
197 vbuffers[attr].buffer = NULL;
198 vbuffers[attr].user_buffer = NULL;
199 pipe_resource_reference(&vbuffers[attr].buffer, stobj->buffer);
200 vbuffers[attr].buffer_offset = pointer_to_offset(low_addr);
201 velements[attr].src_offset = arrays[mesaAttr]->Ptr - low_addr;
202
203 /* map the attrib buffer */
204 map = pipe_buffer_map(pipe, vbuffers[attr].buffer,
205 PIPE_TRANSFER_READ,
206 &vb_transfer[attr]);
207 draw_set_mapped_vertex_buffer(draw, attr, map,
208 vbuffers[attr].buffer->width0);
209 }
210 else {
211 vbuffers[attr].buffer = NULL;
212 vbuffers[attr].user_buffer = arrays[mesaAttr]->Ptr;
213 vbuffers[attr].buffer_offset = 0;
214 velements[attr].src_offset = 0;
215
216 draw_set_mapped_vertex_buffer(draw, attr, vbuffers[attr].user_buffer,
217 ~0);
218 }
219
220 /* common-case setup */
221 vbuffers[attr].stride = arrays[mesaAttr]->StrideB; /* in bytes */
222 velements[attr].instance_divisor = 0;
223 velements[attr].vertex_buffer_index = attr;
224 velements[attr].src_format =
225 st_pipe_vertex_format(arrays[mesaAttr]->Type,
226 arrays[mesaAttr]->Size,
227 arrays[mesaAttr]->Format,
228 arrays[mesaAttr]->Normalized,
229 arrays[mesaAttr]->Integer);
230 assert(velements[attr].src_format);
231
232 /* tell draw about this attribute */
233 #if 0
234 draw_set_vertex_buffer(draw, attr, &vbuffer[attr]);
235 #endif
236 }
237
238 draw_set_vertex_buffers(draw, 0, vp->num_inputs, vbuffers);
239 draw_set_vertex_elements(draw, vp->num_inputs, velements);
240
241 memset(&ibuffer, 0, sizeof(ibuffer));
242 if (ib) {
243 struct gl_buffer_object *bufobj = ib->obj;
244
245 ibuffer.index_size = vbo_sizeof_ib_type(ib->type);
246 if (ibuffer.index_size == 0)
247 goto out_unref_vertex;
248
249 if (bufobj && bufobj->Name) {
250 struct st_buffer_object *stobj = st_buffer_object(bufobj);
251
252 pipe_resource_reference(&ibuffer.buffer, stobj->buffer);
253 ibuffer.offset = pointer_to_offset(ib->ptr);
254
255 mapped_indices = pipe_buffer_map(pipe, stobj->buffer,
256 PIPE_TRANSFER_READ, &ib_transfer);
257 }
258 else {
259 /* skip setting ibuffer.buffer as the draw module does not use it */
260 mapped_indices = ib->ptr;
261 }
262
263 draw_set_indexes(draw,
264 (ubyte *) mapped_indices + ibuffer.offset,
265 ibuffer.index_size, ~0);
266 }
267
268 /* set the constant buffer */
269 draw_set_mapped_constant_buffer(st->draw, PIPE_SHADER_VERTEX, 0,
270 st->state.constants[PIPE_SHADER_VERTEX].ptr,
271 st->state.constants[PIPE_SHADER_VERTEX].size);
272
273
274 /* draw here */
275 for (i = 0; i < nr_prims; i++) {
276 draw_arrays(draw, prims[i].mode, prims[i].start, prims[i].count);
277 }
278
279
280 /*
281 * unmap vertex/index buffers
282 */
283 if (ib) {
284 draw_set_indexes(draw, NULL, 0, 0);
285 if (ib_transfer)
286 pipe_buffer_unmap(pipe, ib_transfer);
287 pipe_resource_reference(&ibuffer.buffer, NULL);
288 }
289
290 out_unref_vertex:
291 for (attr = 0; attr < vp->num_inputs; attr++) {
292 if (vb_transfer[attr])
293 pipe_buffer_unmap(pipe, vb_transfer[attr]);
294 draw_set_mapped_vertex_buffer(draw, attr, NULL, 0);
295 pipe_resource_reference(&vbuffers[attr].buffer, NULL);
296 }
297 draw_set_vertex_buffers(draw, 0, vp->num_inputs, NULL);
298 }
299