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    struct st_vp_variant *vp_variant;
 131    const struct pipe_shader_state *vs;
 132    struct pipe_vertex_buffer vbuffers[PIPE_MAX_SHADER_INPUTS];
 133    unsigned num_vbuffers = 0;
 134    struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
 135    struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS] = {NULL};
 136    struct pipe_transfer *ib_transfer = NULL;
 137    GLuint i;
 138    const void *mapped_indices = NULL;
 139
 140    if (!draw)
 141       return;
 142
 143    st_flush_bitmap_cache(st);
 144    st_invalidate_readpix_cache(st);
 145
 146    st_validate_state(st, ST_PIPELINE_RENDER);
 147
 148    if (!index_bounds_valid)
 149       vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index, nr_prims);
 150
 151    /* must get these after state validation! */
 152    vp = st->vp;
 153    vp_variant = st->vp_variant;
 154    vs = &vp_variant->tgsi;
 155
 156    if (!vp_variant->draw_shader) {
 157       vp_variant->draw_shader = draw_create_vertex_shader(draw, vs);
 158    }
 159
 160    /*
 161     * Set up the draw module's state.
 162     *
 163     * We'd like to do this less frequently, but the normal state-update
 164     * code sends state updates to the pipe, not to our private draw module.
 165     */
 166    assert(draw);
 167    draw_set_viewport_states(draw, 0, 1, &st->state.viewport[0]);
 168    draw_set_clip_state(draw, &st->state.clip);
 169    draw_set_rasterizer_state(draw, &st->state.rasterizer, NULL);
 170    draw_bind_vertex_shader(draw, vp_variant->draw_shader);
 171    set_feedback_vertex_format(ctx);
 172
 173    /* Must setup these after state validation! */
 174    /* Setup arrays */
 175    st_setup_arrays(st, vp, vp_variant, velements, vbuffers, &num_vbuffers);
 176    /* Setup current values as userspace arrays */
 177    st_setup_current_user(st, vp, vp_variant, velements, vbuffers, &num_vbuffers);
 178
 179    /* Map all buffers and tell draw about their mapping */
 180    for (unsigned buf = 0; buf < num_vbuffers; ++buf) {
 181       struct pipe_vertex_buffer *vbuffer = &vbuffers[buf];
 182
 183       if (vbuffer->is_user_buffer) {
 184          draw_set_mapped_vertex_buffer(draw, buf, vbuffer->buffer.user, ~0);
 185       } else {
 186          void *map = pipe_buffer_map(pipe, vbuffer->buffer.resource,
 187                                      PIPE_TRANSFER_READ, &vb_transfer[buf]);
 188          draw_set_mapped_vertex_buffer(draw, buf, map,
 189                                        vbuffer->buffer.resource->width0);
 190       }
 191    }
 192
 193    draw_set_vertex_buffers(draw, 0, num_vbuffers, vbuffers);
 194    draw_set_vertex_elements(draw, vp->num_inputs, velements);
 195
 196    unsigned start = 0;
 197
 198    if (ib) {
 199       struct gl_buffer_object *bufobj = ib->obj;
 200       unsigned index_size = ib->index_size;
 201
 202       if (index_size == 0)
 203          goto out_unref_vertex;
 204
 205       if (bufobj && bufobj->Name) {
 206          struct st_buffer_object *stobj = st_buffer_object(bufobj);
 207
 208          start = pointer_to_offset(ib->ptr) / index_size;
 209          mapped_indices = pipe_buffer_map(pipe, stobj->buffer,
 210                                           PIPE_TRANSFER_READ, &ib_transfer);
 211       }
 212       else {
 213          mapped_indices = ib->ptr;
 214       }
 215
 216       draw_set_indexes(draw,
 217                        (ubyte *) mapped_indices,
 218                        index_size, ~0);
 219    }
 220
 221    /* set the constant buffer */
 222    draw_set_mapped_constant_buffer(st->draw, PIPE_SHADER_VERTEX, 0,
 223                                    st->state.constants[PIPE_SHADER_VERTEX].ptr,
 224                                    st->state.constants[PIPE_SHADER_VERTEX].size);
 225
 226
 227    /* draw here */
 228    for (i = 0; i < nr_prims; i++) {
 229       draw_arrays(draw, prims[i].mode, start + prims[i].start, prims[i].count);
 230    }
 231
 232
 233    /*
 234     * unmap vertex/index buffers
 235     */
 236    if (ib) {
 237       draw_set_indexes(draw, NULL, 0, 0);
 238       if (ib_transfer)
 239          pipe_buffer_unmap(pipe, ib_transfer);
 240    }
 241
 242  out_unref_vertex:
 243    for (unsigned buf = 0; buf < num_vbuffers; ++buf) {
 244       if (vb_transfer[buf])
 245          pipe_buffer_unmap(pipe, vb_transfer[buf]);
 246       draw_set_mapped_vertex_buffer(draw, buf, NULL, 0);
 247    }
 248    draw_set_vertex_buffers(draw, 0, num_vbuffers, NULL);
 249 }