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 #include "st_util.h"
  43
  44 #include "pipe/p_context.h"
  45 #include "pipe/p_defines.h"
  46 #include "util/u_inlines.h"
  47 #include "util/u_draw.h"
  48
  49 #include "draw/draw_private.h"
  50 #include "draw/draw_context.h"
  51
  52
  53 /**
  54  * Set the (private) draw module's post-transformed vertex format when in
  55  * GL_SELECT or GL_FEEDBACK mode or for glRasterPos.
  56  */
  57 static void
  58 set_feedback_vertex_format(struct gl_context *ctx)
  59 {
  60 #if 0
  61    struct st_context *st = st_context(ctx);
  62    struct vertex_info vinfo;
  63    GLuint i;
  64
  65    memset(&vinfo, 0, sizeof(vinfo));
  66
  67    if (ctx->RenderMode == GL_SELECT) {
  68       assert(ctx->RenderMode == GL_SELECT);
  69       vinfo.num_attribs = 1;
  70       vinfo.format[0] = FORMAT_4F;
  71       vinfo.interp_mode[0] = INTERP_LINEAR;
  72    }
  73    else {
  74       /* GL_FEEDBACK, or glRasterPos */
  75       /* emit all attribs (pos, color, texcoord) as GLfloat[4] */
  76       vinfo.num_attribs = st->state.vs->cso->state.num_outputs;
  77       for (i = 0; i < vinfo.num_attribs; i++) {
  78          vinfo.format[i] = FORMAT_4F;
  79          vinfo.interp_mode[i] = INTERP_LINEAR;
  80       }
  81    }
  82
  83    draw_set_vertex_info(st->draw, &vinfo);
  84 #endif
  85 }
  86
  87
  88 /**
  89  * Called by VBO to draw arrays when in selection or feedback mode and
  90  * to implement glRasterPos.
  91  * This function mirrors the normal st_draw_vbo().
  92  * Look at code refactoring some day.
  93  */
  94 void
  95 st_feedback_draw_vbo(struct gl_context *ctx,
  96                      const struct _mesa_prim *prims,
  97                      GLuint nr_prims,
  98                      const struct _mesa_index_buffer *ib,
  99                      GLboolean index_bounds_valid,
 100                      GLuint min_index,
 101                      GLuint max_index,
 102                      struct gl_transform_feedback_object *tfb_vertcount,
 103                      unsigned stream,
 104                      struct gl_buffer_object *indirect)
 105 {
 106    struct st_context *st = st_context(ctx);
 107    struct pipe_context *pipe = st->pipe;
 108    struct draw_context *draw = st_get_draw_context(st);
 109    const struct st_vertex_program *vp;
 110    struct st_vp_variant *vp_variant;
 111    const struct pipe_shader_state *vs;
 112    struct pipe_vertex_buffer vbuffers[PIPE_MAX_SHADER_INPUTS];
 113    unsigned num_vbuffers = 0;
 114    struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
 115    struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS] = {NULL};
 116    struct pipe_transfer *ib_transfer = NULL;
 117    GLuint i;
 118    const void *mapped_indices = NULL;
 119    struct pipe_draw_info info;
 120
 121    if (!draw)
 122       return;
 123
 124    /* Initialize pipe_draw_info. */
 125    info.primitive_restart = false;
 126    info.vertices_per_patch = ctx->TessCtrlProgram.patch_vertices;
 127    info.indirect = NULL;
 128    info.count_from_stream_output = NULL;
 129    info.restart_index = 0;
 130
 131    st_flush_bitmap_cache(st);
 132    st_invalidate_readpix_cache(st);
 133
 134    st_validate_state(st, ST_PIPELINE_RENDER);
 135
 136    if (!index_bounds_valid)
 137       vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index, nr_prims);
 138
 139    /* must get these after state validation! */
 140    vp = st->vp;
 141    vp_variant = st->vp_variant;
 142    vs = &vp_variant->tgsi;
 143
 144    if (!vp_variant->draw_shader) {
 145       vp_variant->draw_shader = draw_create_vertex_shader(draw, vs);
 146    }
 147
 148    /*
 149     * Set up the draw module's state.
 150     *
 151     * We'd like to do this less frequently, but the normal state-update
 152     * code sends state updates to the pipe, not to our private draw module.
 153     */
 154    assert(draw);
 155    draw_set_viewport_states(draw, 0, 1, &st->state.viewport[0]);
 156    draw_set_clip_state(draw, &st->state.clip);
 157    draw_set_rasterizer_state(draw, &st->state.rasterizer, NULL);
 158    draw_bind_vertex_shader(draw, vp_variant->draw_shader);
 159    set_feedback_vertex_format(ctx);
 160
 161    /* Must setup these after state validation! */
 162    /* Setup arrays */
 163    st_setup_arrays(st, vp, vp_variant, velements, vbuffers, &num_vbuffers);
 164    /* Setup current values as userspace arrays */
 165    st_setup_current_user(st, vp, vp_variant, velements, vbuffers, &num_vbuffers);
 166
 167    /* Map all buffers and tell draw about their mapping */
 168    for (unsigned buf = 0; buf < num_vbuffers; ++buf) {
 169       struct pipe_vertex_buffer *vbuffer = &vbuffers[buf];
 170
 171       if (vbuffer->is_user_buffer) {
 172          draw_set_mapped_vertex_buffer(draw, buf, vbuffer->buffer.user, ~0);
 173       } else {
 174          void *map = pipe_buffer_map(pipe, vbuffer->buffer.resource,
 175                                      PIPE_TRANSFER_READ, &vb_transfer[buf]);
 176          draw_set_mapped_vertex_buffer(draw, buf, map,
 177                                        vbuffer->buffer.resource->width0);
 178       }
 179    }
 180
 181    draw_set_vertex_buffers(draw, 0, num_vbuffers, vbuffers);
 182    draw_set_vertex_elements(draw, vp->num_inputs, velements);
 183
 184    unsigned start = 0;
 185
 186    if (ib) {
 187       struct gl_buffer_object *bufobj = ib->obj;
 188       unsigned index_size = ib->index_size;
 189
 190       if (index_size == 0)
 191          goto out_unref_vertex;
 192
 193       if (bufobj && bufobj->Name) {
 194          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 195
 196          start = pointer_to_offset(ib->ptr) / index_size;
 197          mapped_indices = pipe_buffer_map(pipe, stobj->buffer,
 198                                           PIPE_TRANSFER_READ, &ib_transfer);
 199       }
 200       else {
 201          mapped_indices = ib->ptr;
 202       }
 203
 204       info.index_size = ib->index_size;
 205       info.min_index = min_index;
 206       info.max_index = max_index;
 207       info.has_user_indices = true;
 208       info.index.user = mapped_indices;
 209
 210       draw_set_indexes(draw,
 211                        (ubyte *) mapped_indices,
 212                        index_size, ~0);
 213
 214       if (ctx->Array._PrimitiveRestart) {
 215          info.primitive_restart = true;
 216          info.restart_index = _mesa_primitive_restart_index(ctx, info.index_size);
 217       }
 218    } else {
 219       info.index_size = 0;
 220       info.has_user_indices = false;
 221    }
 222
 223    /* set the constant buffer */
 224    draw_set_mapped_constant_buffer(st->draw, PIPE_SHADER_VERTEX, 0,
 225                                    st->state.constants[PIPE_SHADER_VERTEX].ptr,
 226                                    st->state.constants[PIPE_SHADER_VERTEX].size);
 227
 228
 229    /* draw here */
 230    for (i = 0; i < nr_prims; i++) {
 231       info.count = prims[i].count;
 232
 233       if (!info.count)
 234          continue;
 235
 236       info.mode = prims[i].mode;
 237       info.start = start + prims[i].start;
 238       info.start_instance = prims[i].base_instance;
 239       info.instance_count = prims[i].num_instances;
 240       info.index_bias = prims[i].basevertex;
 241       info.drawid = prims[i].draw_id;
 242       if (!ib) {
 243          info.min_index = info.start;
 244          info.max_index = info.start + info.count - 1;
 245       }
 246
 247       draw_vbo(draw, &info);
 248    }
 249
 250
 251    /*
 252     * unmap vertex/index buffers
 253     */
 254    if (ib) {
 255       draw_set_indexes(draw, NULL, 0, 0);
 256       if (ib_transfer)
 257          pipe_buffer_unmap(pipe, ib_transfer);
 258    }
 259
 260  out_unref_vertex:
 261    for (unsigned buf = 0; buf < num_vbuffers; ++buf) {
 262       if (vb_transfer[buf])
 263          pipe_buffer_unmap(pipe, vb_transfer[buf]);
 264       draw_set_mapped_vertex_buffer(draw, buf, NULL, 0);
 265    }
 266    draw_set_vertex_buffers(draw, 0, num_vbuffers, NULL);
 267 }