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/arrayobj.h"
  30 #include "main/image.h"
  31 #include "main/macros.h"
  32 #include "main/varray.h"
  33
  34 #include "vbo/vbo.h"
  35
  36 #include "st_context.h"
  37 #include "st_atom.h"
  38 #include "st_cb_bitmap.h"
  39 #include "st_cb_bufferobjects.h"
  40 #include "st_draw.h"
  41 #include "st_program.h"
  42
  43 #include "pipe/p_context.h"
  44 #include "pipe/p_defines.h"
  45 #include "util/u_inlines.h"
  46 #include "util/u_draw.h"
  47
  48 #include "draw/draw_private.h"
  49 #include "draw/draw_context.h"
  50
  51
  52 /**
  53  * Set the (private) draw module's post-transformed vertex format when in
  54  * GL_SELECT or GL_FEEDBACK mode or for glRasterPos.
  55  */
  56 static void
  57 set_feedback_vertex_format(struct gl_context *ctx)
  58 {
  59 #if 0
  60    struct st_context *st = st_context(ctx);
  61    struct vertex_info vinfo;
  62    GLuint i;
  63
  64    memset(&vinfo, 0, sizeof(vinfo));
  65
  66    if (ctx->RenderMode == GL_SELECT) {
  67       assert(ctx->RenderMode == GL_SELECT);
  68       vinfo.num_attribs = 1;
  69       vinfo.format[0] = FORMAT_4F;
  70       vinfo.interp_mode[0] = INTERP_LINEAR;
  71    }
  72    else {
  73       /* GL_FEEDBACK, or glRasterPos */
  74       /* emit all attribs (pos, color, texcoord) as GLfloat[4] */
  75       vinfo.num_attribs = st->state.vs->cso->state.num_outputs;
  76       for (i = 0; i < vinfo.num_attribs; i++) {
  77          vinfo.format[i] = FORMAT_4F;
  78          vinfo.interp_mode[i] = INTERP_LINEAR;
  79       }
  80    }
  81
  82    draw_set_vertex_info(st->draw, &vinfo);
  83 #endif
  84 }
  85
  86
  87 /**
  88  * Helper for drawing current vertex arrays.
  89  */
  90 static void
  91 draw_arrays(struct draw_context *draw, unsigned mode,
  92             unsigned start, unsigned count)
  93 {
  94    struct pipe_draw_info info;
  95
  96    util_draw_init_info(&info);
  97
  98    info.mode = mode;
  99    info.start = start;
 100    info.count = count;
 101    info.min_index = start;
 102    info.max_index = start + count - 1;
 103
 104    draw_vbo(draw, &info);
 105 }
 106
 107
 108 /**
 109  * Called by VBO to draw arrays when in selection or feedback mode and
 110  * to implement glRasterPos.
 111  * This is very much like the normal draw_vbo() function above.
 112  * Look at code refactoring some day.
 113  */
 114 void
 115 st_feedback_draw_vbo(struct gl_context *ctx,
 116                      const struct _mesa_prim *prims,
 117                      GLuint nr_prims,
 118                      const struct _mesa_index_buffer *ib,
 119                      GLboolean index_bounds_valid,
 120                      GLuint min_index,
 121                      GLuint max_index,
 122                      struct gl_transform_feedback_object *tfb_vertcount,
 123                      unsigned stream,
 124                      struct gl_buffer_object *indirect)
 125 {
 126    struct st_context *st = st_context(ctx);
 127    struct pipe_context *pipe = st->pipe;
 128    struct draw_context *draw = st_get_draw_context(st);
 129    const struct st_vertex_program *vp;
 130    const struct pipe_shader_state *vs;
 131    struct pipe_vertex_buffer vbuffers[PIPE_MAX_SHADER_INPUTS];
 132    struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
 133    struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS] = {NULL};
 134    struct pipe_transfer *ib_transfer = NULL;
 135    GLuint attr, i;
 136    const void *mapped_indices = NULL;
 137
 138    if (!draw)
 139       return;
 140
 141    st_flush_bitmap_cache(st);
 142    st_invalidate_readpix_cache(st);
 143
 144    st_validate_state(st, ST_PIPELINE_RENDER);
 145
 146    if (!index_bounds_valid)
 147       vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index, nr_prims);
 148
 149    /* must get these after state validation! */
 150    vp = st->vp;
 151    vs = &st->vp_variant->tgsi;
 152
 153    if (!st->vp_variant->draw_shader) {
 154       st->vp_variant->draw_shader = draw_create_vertex_shader(draw, vs);
 155    }
 156
 157    /*
 158     * Set up the draw module's state.
 159     *
 160     * We'd like to do this less frequently, but the normal state-update
 161     * code sends state updates to the pipe, not to our private draw module.
 162     */
 163    assert(draw);
 164    draw_set_viewport_states(draw, 0, 1, &st->state.viewport[0]);
 165    draw_set_clip_state(draw, &st->state.clip);
 166    draw_set_rasterizer_state(draw, &st->state.rasterizer, NULL);
 167    draw_bind_vertex_shader(draw, st->vp_variant->draw_shader);
 168    set_feedback_vertex_format(ctx);
 169
 170    /* loop over TGSI shader inputs to determine vertex buffer
 171     * and attribute info
 172     */
 173    for (attr = 0; attr < vp->num_inputs; attr++) {
 174       const GLuint mesaAttr = vp->index_to_input[attr];
 175       const struct gl_vertex_buffer_binding *binding;
 176       const struct gl_array_attributes *attrib;
 177       void *map;
 178
 179       _mesa_draw_attrib_and_binding(ctx, mesaAttr, &attrib, &binding);
 180
 181       if (_mesa_is_bufferobj(binding->BufferObj)) {
 182          /* Attribute data is in a VBO. */
 183          struct st_buffer_object *stobj = st_buffer_object(binding->BufferObj);
 184          assert(stobj->buffer);
 185
 186          vbuffers[attr].buffer.resource = NULL;
 187          vbuffers[attr].is_user_buffer = false;
 188          vbuffers[attr].buffer.resource = stobj->buffer;
 189          vbuffers[attr].buffer_offset = _mesa_draw_binding_offset(binding);
 190          velements[attr].src_offset =
 191             _mesa_draw_attributes_relative_offset(attrib);
 192
 193          /* map the attrib buffer */
 194          map = pipe_buffer_map(pipe, vbuffers[attr].buffer.resource,
 195                                PIPE_TRANSFER_READ,
 196                                &vb_transfer[attr]);
 197          draw_set_mapped_vertex_buffer(draw, attr, map,
 198                                        vbuffers[attr].buffer.resource->width0);
 199       }
 200       else {
 201          /* Attribute data is in a user space array. */
 202          vbuffers[attr].buffer.user = attrib->Ptr;
 203          vbuffers[attr].is_user_buffer = true;
 204          vbuffers[attr].buffer_offset = 0;
 205          velements[attr].src_offset = 0;
 206
 207          draw_set_mapped_vertex_buffer(draw, attr,
 208                                        vbuffers[attr].buffer.user, ~0);
 209       }
 210
 211       /* common-case setup */
 212       vbuffers[attr].stride = binding->Stride; /* in bytes */
 213       velements[attr].instance_divisor = 0;
 214       velements[attr].vertex_buffer_index = attr;
 215       velements[attr].src_format = st_pipe_vertex_format(&attrib->Format);
 216       assert(velements[attr].src_format);
 217
 218       /* tell draw about this attribute */
 219 #if 0
 220       draw_set_vertex_buffer(draw, attr, &vbuffer[attr]);
 221 #endif
 222    }
 223
 224    draw_set_vertex_buffers(draw, 0, vp->num_inputs, vbuffers);
 225    draw_set_vertex_elements(draw, vp->num_inputs, velements);
 226
 227    unsigned start = 0;
 228
 229    if (ib) {
 230       struct gl_buffer_object *bufobj = ib->obj;
 231       unsigned index_size = ib->index_size;
 232
 233       if (index_size == 0)
 234          goto out_unref_vertex;
 235
 236       if (bufobj && bufobj->Name) {
 237          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 238
 239          start = pointer_to_offset(ib->ptr) / index_size;
 240          mapped_indices = pipe_buffer_map(pipe, stobj->buffer,
 241                                           PIPE_TRANSFER_READ, &ib_transfer);
 242       }
 243       else {
 244          mapped_indices = ib->ptr;
 245       }
 246
 247       draw_set_indexes(draw,
 248                        (ubyte *) mapped_indices,
 249                        index_size, ~0);
 250    }
 251
 252    /* set the constant buffer */
 253    draw_set_mapped_constant_buffer(st->draw, PIPE_SHADER_VERTEX, 0,
 254                                    st->state.constants[PIPE_SHADER_VERTEX].ptr,
 255                                    st->state.constants[PIPE_SHADER_VERTEX].size);
 256
 257
 258    /* draw here */
 259    for (i = 0; i < nr_prims; i++) {
 260       draw_arrays(draw, prims[i].mode, start + prims[i].start, prims[i].count);
 261    }
 262
 263
 264    /*
 265     * unmap vertex/index buffers
 266     */
 267    if (ib) {
 268       draw_set_indexes(draw, NULL, 0, 0);
 269       if (ib_transfer)
 270          pipe_buffer_unmap(pipe, ib_transfer);
 271    }
 272
 273  out_unref_vertex:
 274    for (attr = 0; attr < vp->num_inputs; attr++) {
 275       if (vb_transfer[attr])
 276          pipe_buffer_unmap(pipe, vb_transfer[attr]);
 277       draw_set_mapped_vertex_buffer(draw, attr, NULL, 0);
 278    }
 279    draw_set_vertex_buffers(draw, 0, vp->num_inputs, NULL);
 280 }