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