src/mesa/state_tracker/st_draw_feedback.c

   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
  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
  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
 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->draw;
 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_client_array **arrays = ctx->Array._DrawArrays;
 135    GLuint attr, i;
 136    const GLubyte *low_addr = NULL;
 137    const void *mapped_indices = NULL;
 138
 139    assert(draw);
 140
 141    st_flush_bitmap_cache(st);
 142
 143    st_validate_state(st, ST_PIPELINE_RENDER);
 144
 145    if (!index_bounds_valid)
 146       vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index, nr_prims);
 147
 148    /* must get these after state validation! */
 149    vp = st->vp;
 150    vs = &st->vp_variant->tgsi;
 151
 152    if (!st->vp_variant->draw_shader) {
 153       st->vp_variant->draw_shader = draw_create_vertex_shader(draw, vs);
 154    }
 155
 156    /*
 157     * Set up the draw module's state.
 158     *
 159     * We'd like to do this less frequently, but the normal state-update
 160     * code sends state updates to the pipe, not to our private draw module.
 161     */
 162    assert(draw);
 163    draw_set_viewport_states(draw, 0, 1, &st->state.viewport[0]);
 164    draw_set_clip_state(draw, &st->state.clip);
 165    draw_set_rasterizer_state(draw, &st->state.rasterizer, NULL);
 166    draw_bind_vertex_shader(draw, st->vp_variant->draw_shader);
 167    set_feedback_vertex_format(ctx);
 168
 169    /* Find the lowest address of the arrays we're drawing */
 170    if (vp->num_inputs) {
 171       low_addr = arrays[vp->index_to_input[0]]->Ptr;
 172
 173       for (attr = 1; attr < vp->num_inputs; attr++) {
 174          const GLubyte *start = arrays[vp->index_to_input[attr]]->Ptr;
 175          low_addr = MIN2(low_addr, start);
 176       }
 177    }
 178
 179    /* loop over TGSI shader inputs to determine vertex buffer
 180     * and attribute info
 181     */
 182    for (attr = 0; attr < vp->num_inputs; attr++) {
 183       const GLuint mesaAttr = vp->index_to_input[attr];
 184       struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
 185       void *map;
 186
 187       if (bufobj && bufobj->Name) {
 188          /* Attribute data is in a VBO.
 189           * Recall that for VBOs, the gl_client_array->Ptr field is
 190           * really an offset from the start of the VBO, not a pointer.
 191           */
 192          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 193          assert(stobj->buffer);
 194
 195          vbuffers[attr].buffer = NULL;
 196          vbuffers[attr].user_buffer = NULL;
 197          pipe_resource_reference(&vbuffers[attr].buffer, stobj->buffer);
 198          vbuffers[attr].buffer_offset = pointer_to_offset(low_addr);
 199          velements[attr].src_offset = arrays[mesaAttr]->Ptr - low_addr;
 200
 201          /* map the attrib buffer */
 202          map = pipe_buffer_map(pipe, vbuffers[attr].buffer,
 203                                PIPE_TRANSFER_READ,
 204                                &vb_transfer[attr]);
 205          draw_set_mapped_vertex_buffer(draw, attr, map,
 206                                        vbuffers[attr].buffer->width0);
 207       }
 208       else {
 209          vbuffers[attr].buffer = NULL;
 210          vbuffers[attr].user_buffer = arrays[mesaAttr]->Ptr;
 211          vbuffers[attr].buffer_offset = 0;
 212          velements[attr].src_offset = 0;
 213
 214          draw_set_mapped_vertex_buffer(draw, attr, vbuffers[attr].user_buffer,
 215                                        ~0);
 216       }
 217
 218       /* common-case setup */
 219       vbuffers[attr].stride = arrays[mesaAttr]->StrideB; /* in bytes */
 220       velements[attr].instance_divisor = 0;
 221       velements[attr].vertex_buffer_index = attr;
 222       velements[attr].src_format =
 223          st_pipe_vertex_format(arrays[mesaAttr]->Type,
 224                                arrays[mesaAttr]->Size,
 225                                arrays[mesaAttr]->Format,
 226                                arrays[mesaAttr]->Normalized,
 227                                arrays[mesaAttr]->Integer);
 228       assert(velements[attr].src_format);
 229
 230       /* tell draw about this attribute */
 231 #if 0
 232       draw_set_vertex_buffer(draw, attr, &vbuffer[attr]);
 233 #endif
 234    }
 235
 236    draw_set_vertex_buffers(draw, 0, vp->num_inputs, vbuffers);
 237    draw_set_vertex_elements(draw, vp->num_inputs, velements);
 238
 239    memset(&ibuffer, 0, sizeof(ibuffer));
 240    if (ib) {
 241       struct gl_buffer_object *bufobj = ib->obj;
 242
 243       ibuffer.index_size = vbo_sizeof_ib_type(ib->type);
 244       if (ibuffer.index_size == 0)
 245          goto out_unref_vertex;
 246
 247       if (bufobj && bufobj->Name) {
 248          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 249
 250          pipe_resource_reference(&ibuffer.buffer, stobj->buffer);
 251          ibuffer.offset = pointer_to_offset(ib->ptr);
 252
 253          mapped_indices = pipe_buffer_map(pipe, stobj->buffer,
 254                                           PIPE_TRANSFER_READ, &ib_transfer);
 255       }
 256       else {
 257          /* skip setting ibuffer.buffer as the draw module does not use it */
 258          mapped_indices = ib->ptr;
 259       }
 260
 261       draw_set_indexes(draw,
 262                        (ubyte *) mapped_indices + ibuffer.offset,
 263                        ibuffer.index_size, ~0);
 264    }
 265
 266    /* set the constant buffer */
 267    draw_set_mapped_constant_buffer(st->draw, PIPE_SHADER_VERTEX, 0,
 268                                    st->state.constants[PIPE_SHADER_VERTEX].ptr,
 269                                    st->state.constants[PIPE_SHADER_VERTEX].size);
 270
 271
 272    /* draw here */
 273    for (i = 0; i < nr_prims; i++) {
 274       draw_arrays(draw, prims[i].mode, prims[i].start, prims[i].count);
 275    }
 276
 277
 278    /*
 279     * unmap vertex/index buffers
 280     */
 281    if (ib) {
 282       draw_set_indexes(draw, NULL, 0, 0);
 283       if (ib_transfer)
 284          pipe_buffer_unmap(pipe, ib_transfer);
 285       pipe_resource_reference(&ibuffer.buffer, NULL);
 286    }
 287
 288  out_unref_vertex:
 289    for (attr = 0; attr < vp->num_inputs; attr++) {
 290       if (vb_transfer[attr])
 291          pipe_buffer_unmap(pipe, vb_transfer[attr]);
 292       draw_set_mapped_vertex_buffer(draw, attr, NULL, 0);
 293       pipe_resource_reference(&vbuffers[attr].buffer, NULL);
 294    }
 295    draw_set_vertex_buffers(draw, 0, vp->num_inputs, NULL);
 296 }