st_draw.c revision aa249190a5df098c8a22d0e4649c58007d416c8a 
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/*
29 * This file implements the st_draw_vbo() function which is called from
30 * Mesa's VBO module.  All point/line/triangle rendering is done through
31 * this function whether the user called glBegin/End, glDrawArrays,
32 * glDrawElements, glEvalMesh, or glCalList, etc.
33 *
34 * Authors:
35 *   Keith Whitwell <keithw@vmware.com>
36 */
37
38
39#include "main/imports.h"
40#include "main/image.h"
41#include "main/bufferobj.h"
42#include "main/macros.h"
43#include "main/varray.h"
44
45#include "glsl/ir_uniform.h"
46
47#include "vbo/vbo.h"
48
49#include "st_context.h"
50#include "st_atom.h"
51#include "st_cb_bufferobjects.h"
52#include "st_cb_xformfb.h"
53#include "st_debug.h"
54#include "st_draw.h"
55#include "st_program.h"
56
57#include "pipe/p_context.h"
58#include "pipe/p_defines.h"
59#include "util/u_inlines.h"
60#include "util/u_format.h"
61#include "util/u_prim.h"
62#include "util/u_draw_quad.h"
63#include "util/u_upload_mgr.h"
64#include "draw/draw_context.h"
65#include "cso_cache/cso_context.h"
66
67
68/**
69 * This is very similar to vbo_all_varyings_in_vbos() but we are
70 * only interested in per-vertex data.  See bug 38626.
71 */
72static GLboolean
73all_varyings_in_vbos(const struct gl_client_array *arrays[])
74{
75   GLuint i;
76
77   for (i = 0; i < VERT_ATTRIB_MAX; i++)
78      if (arrays[i]->StrideB &&
79          !arrays[i]->InstanceDivisor &&
80          !_mesa_is_bufferobj(arrays[i]->BufferObj))
81	 return GL_FALSE;
82
83   return GL_TRUE;
84}
85
86
87/**
88 * Basically, translate Mesa's index buffer information into
89 * a pipe_index_buffer object.
90 * \return TRUE or FALSE for success/failure
91 */
92static boolean
93setup_index_buffer(struct st_context *st,
94                   const struct _mesa_index_buffer *ib,
95                   struct pipe_index_buffer *ibuffer)
96{
97   struct gl_buffer_object *bufobj = ib->obj;
98
99   ibuffer->index_size = vbo_sizeof_ib_type(ib->type);
100
101   /* get/create the index buffer object */
102   if (_mesa_is_bufferobj(bufobj)) {
103      /* indices are in a real VBO */
104      ibuffer->buffer = st_buffer_object(bufobj)->buffer;
105      ibuffer->offset = pointer_to_offset(ib->ptr);
106   }
107   else if (st->indexbuf_uploader) {
108      /* upload indexes from user memory into a real buffer */
109      u_upload_data(st->indexbuf_uploader, 0,
110                    ib->count * ibuffer->index_size, ib->ptr,
111                    &ibuffer->offset, &ibuffer->buffer);
112      if (!ibuffer->buffer) {
113         /* out of memory */
114         return FALSE;
115      }
116      u_upload_unmap(st->indexbuf_uploader);
117   }
118   else {
119      /* indices are in user space memory */
120      ibuffer->user_buffer = ib->ptr;
121   }
122
123   cso_set_index_buffer(st->cso_context, ibuffer);
124   return TRUE;
125}
126
127
128/**
129 * Prior to drawing, check that any uniforms referenced by the
130 * current shader have been set.  If a uniform has not been set,
131 * issue a warning.
132 */
133static void
134check_uniforms(struct gl_context *ctx)
135{
136   struct gl_shader_program **shProg = ctx->_Shader->CurrentProgram;
137   unsigned j;
138
139   for (j = 0; j < 3; j++) {
140      unsigned i;
141
142      if (shProg[j] == NULL || !shProg[j]->LinkStatus)
143	 continue;
144
145      for (i = 0; i < shProg[j]->NumUniformStorage; i++) {
146         const struct gl_uniform_storage *u = &shProg[j]->UniformStorage[i];
147         if (!u->initialized) {
148            _mesa_warning(ctx,
149                          "Using shader with uninitialized uniform: %s",
150                          u->name);
151         }
152      }
153   }
154}
155
156
157/**
158 * Translate OpenGL primtive type (GL_POINTS, GL_TRIANGLE_STRIP, etc) to
159 * the corresponding Gallium type.
160 */
161static unsigned
162translate_prim(const struct gl_context *ctx, unsigned prim)
163{
164   /* GL prims should match Gallium prims, spot-check a few */
165   STATIC_ASSERT(GL_POINTS == PIPE_PRIM_POINTS);
166   STATIC_ASSERT(GL_QUADS == PIPE_PRIM_QUADS);
167   STATIC_ASSERT(GL_TRIANGLE_STRIP_ADJACENCY == PIPE_PRIM_TRIANGLE_STRIP_ADJACENCY);
168   STATIC_ASSERT(GL_PATCHES == PIPE_PRIM_PATCHES);
169
170   return prim;
171}
172
173
174/**
175 * This function gets plugged into the VBO module and is called when
176 * we have something to render.
177 * Basically, translate the information into the format expected by gallium.
178 */
179void
180st_draw_vbo(struct gl_context *ctx,
181            const struct _mesa_prim *prims,
182            GLuint nr_prims,
183            const struct _mesa_index_buffer *ib,
184	    GLboolean index_bounds_valid,
185            GLuint min_index,
186            GLuint max_index,
187            struct gl_transform_feedback_object *tfb_vertcount,
188            unsigned stream,
189            struct gl_buffer_object *indirect)
190{
191   struct st_context *st = st_context(ctx);
192   struct pipe_index_buffer ibuffer = {0};
193   struct pipe_draw_info info;
194   const struct gl_client_array **arrays = ctx->Array._DrawArrays;
195   unsigned i;
196
197   /* Mesa core state should have been validated already */
198   assert(ctx->NewState == 0x0);
199
200   /* Validate state. */
201   if (st->dirty.st || ctx->NewDriverState) {
202      st_validate_state(st);
203
204#if 0
205      if (MESA_VERBOSE & VERBOSE_GLSL) {
206         check_uniforms(ctx);
207      }
208#else
209      (void) check_uniforms;
210#endif
211   }
212
213   if (st->vertex_array_out_of_memory) {
214      return;
215   }
216
217   util_draw_init_info(&info);
218
219   if (ib) {
220      /* Get index bounds for user buffers. */
221      if (!index_bounds_valid)
222         if (!all_varyings_in_vbos(arrays))
223            vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index,
224                                   nr_prims);
225
226      if (!setup_index_buffer(st, ib, &ibuffer)) {
227         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glBegin/DrawElements/DrawArray");
228         return;
229      }
230
231      info.indexed = TRUE;
232      if (min_index != ~0U && max_index != ~0U) {
233         info.min_index = min_index;
234         info.max_index = max_index;
235      }
236
237      /* The VBO module handles restart for the non-indexed GLDrawArrays
238       * so we only set these fields for indexed drawing:
239       */
240      info.primitive_restart = ctx->Array._PrimitiveRestart;
241      info.restart_index = _mesa_primitive_restart_index(ctx, ib->type);
242   }
243   else {
244      /* Transform feedback drawing is always non-indexed. */
245      /* Set info.count_from_stream_output. */
246      if (tfb_vertcount) {
247         if (!st_transform_feedback_draw_init(tfb_vertcount, stream, &info))
248            return;
249      }
250   }
251
252   if (indirect) {
253      info.indirect = st_buffer_object(indirect)->buffer;
254
255      /* Primitive restart is not handled by the VBO module in this case. */
256      info.primitive_restart = ctx->Array._PrimitiveRestart;
257      info.restart_index = ctx->Array.RestartIndex;
258   }
259
260   /* do actual drawing */
261   for (i = 0; i < nr_prims; i++) {
262      info.mode = translate_prim(ctx, prims[i].mode);
263      info.start = prims[i].start;
264      info.count = prims[i].count;
265      info.start_instance = prims[i].base_instance;
266      info.instance_count = prims[i].num_instances;
267      info.vertices_per_patch = ctx->TessCtrlProgram.patch_vertices;
268      info.index_bias = prims[i].basevertex;
269      if (!ib) {
270         info.min_index = info.start;
271         info.max_index = info.start + info.count - 1;
272      }
273      info.indirect_offset = prims[i].indirect_offset;
274
275      if (ST_DEBUG & DEBUG_DRAW) {
276         debug_printf("st/draw: mode %s  start %u  count %u  indexed %d\n",
277                      u_prim_name(info.mode),
278                      info.start,
279                      info.count,
280                      info.indexed);
281      }
282
283      if (info.count_from_stream_output || info.indirect) {
284         cso_draw_vbo(st->cso_context, &info);
285      }
286      else if (info.primitive_restart) {
287         /* don't trim, restarts might be inside index list */
288         cso_draw_vbo(st->cso_context, &info);
289      }
290      else if (u_trim_pipe_prim(prims[i].mode, &info.count)) {
291         cso_draw_vbo(st->cso_context, &info);
292      }
293   }
294
295   if (ib && st->indexbuf_uploader && !_mesa_is_bufferobj(ib->obj)) {
296      pipe_resource_reference(&ibuffer.buffer, NULL);
297   }
298}
299
300
301void
302st_init_draw(struct st_context *st)
303{
304   struct gl_context *ctx = st->ctx;
305
306   vbo_set_draw_func(ctx, st_draw_vbo);
307
308   st->draw = draw_create(st->pipe); /* for selection/feedback */
309
310   /* Disable draw options that might convert points/lines to tris, etc.
311    * as that would foul-up feedback/selection mode.
312    */
313   draw_wide_line_threshold(st->draw, 1000.0f);
314   draw_wide_point_threshold(st->draw, 1000.0f);
315   draw_enable_line_stipple(st->draw, FALSE);
316   draw_enable_point_sprites(st->draw, FALSE);
317}
318
319
320void
321st_destroy_draw(struct st_context *st)
322{
323   draw_destroy(st->draw);
324}
325