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      1 /**********************************************************
      2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
      3  *
      4  * Permission is hereby granted, free of charge, to any person
      5  * obtaining a copy of this software and associated documentation
      6  * files (the "Software"), to deal in the Software without
      7  * restriction, including without limitation the rights to use, copy,
      8  * modify, merge, publish, distribute, sublicense, and/or sell copies
      9  * of the Software, and to permit persons to whom the Software is
     10  * furnished to do so, subject to the following conditions:
     11  *
     12  * The above copyright notice and this permission notice shall be
     13  * included in all copies or substantial portions of the Software.
     14  *
     15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
     19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
     20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     22  * SOFTWARE.
     23  *
     24  **********************************************************/
     25 
     26 #include "util/u_inlines.h"
     27 #include "pipe/p_defines.h"
     28 #include "util/u_math.h"
     29 #include "util/u_upload_mgr.h"
     30 
     31 #include "svga_context.h"
     32 #include "svga_state.h"
     33 #include "svga_draw.h"
     34 #include "svga_tgsi.h"
     35 #include "svga_screen.h"
     36 #include "svga_resource_buffer.h"
     37 
     38 #include "svga_hw_reg.h"
     39 
     40 
     41 /***********************************************************************
     42  */
     43 
     44 
     45 static enum pipe_error
     46 emit_hw_vs_vdecl(struct svga_context *svga, unsigned dirty)
     47 {
     48    const struct pipe_vertex_element *ve = svga->curr.velems->velem;
     49    SVGA3dVertexDecl decl;
     50    unsigned i;
     51    unsigned neg_bias = 0;
     52 
     53    assert(svga->curr.velems->count >=
     54           svga->curr.vs->base.info.file_count[TGSI_FILE_INPUT]);
     55 
     56    svga_hwtnl_reset_vdecl( svga->hwtnl,
     57                            svga->curr.velems->count );
     58 
     59    /**
     60     * We can't set the VDECL offset to something negative, so we
     61     * must calculate a common negative additional index bias, and modify
     62     * the VDECL offsets accordingly so they *all* end up positive.
     63     *
     64     * Note that the exact value of the negative index bias is not that
     65     * important, since we compensate for it when we calculate the vertex
     66     * buffer offset below. The important thing is that all vertex buffer
     67     * offsets remain positive.
     68     *
     69     * Note that we use a negative bias variable in order to make the
     70     * rounding maths more easy to follow, and to avoid int / unsigned
     71     * confusion.
     72     */
     73 
     74    for (i = 0; i < svga->curr.velems->count; i++) {
     75       const struct pipe_vertex_buffer *vb =
     76          &svga->curr.vb[ve[i].vertex_buffer_index];
     77       struct svga_buffer *buffer;
     78       unsigned int offset = vb->buffer_offset + ve[i].src_offset;
     79       unsigned tmp_neg_bias = 0;
     80 
     81       if (!vb->buffer)
     82          continue;
     83 
     84       buffer = svga_buffer(vb->buffer);
     85       if (buffer->uploaded.start > offset) {
     86          tmp_neg_bias = buffer->uploaded.start - offset;
     87          if (vb->stride)
     88             tmp_neg_bias = (tmp_neg_bias + vb->stride - 1) / vb->stride;
     89          neg_bias = MAX2(neg_bias, tmp_neg_bias);
     90       }
     91    }
     92 
     93    for (i = 0; i < svga->curr.velems->count; i++) {
     94       const struct pipe_vertex_buffer *vb =
     95          &svga->curr.vb[ve[i].vertex_buffer_index];
     96       unsigned usage, index;
     97       struct svga_buffer *buffer;
     98 
     99       if (!vb->buffer)
    100          continue;
    101 
    102       buffer= svga_buffer(vb->buffer);
    103       svga_generate_vdecl_semantics( i, &usage, &index );
    104 
    105       /* SVGA_NEW_VELEMENT
    106        */
    107       decl.identity.type = svga->state.sw.ve_format[i];
    108       decl.identity.method = SVGA3D_DECLMETHOD_DEFAULT;
    109       decl.identity.usage = usage;
    110       decl.identity.usageIndex = index;
    111       decl.array.stride = vb->stride;
    112 
    113       /* Compensate for partially uploaded vbo, and
    114        * for the negative index bias.
    115        */
    116       decl.array.offset = (vb->buffer_offset
    117                            + ve[i].src_offset
    118 			   + neg_bias * vb->stride
    119 			   - buffer->uploaded.start);
    120 
    121       assert(decl.array.offset >= 0);
    122 
    123       svga_hwtnl_vdecl( svga->hwtnl,
    124                         i,
    125                         &decl,
    126                         buffer->uploaded.buffer ? buffer->uploaded.buffer :
    127                         vb->buffer );
    128    }
    129 
    130    svga_hwtnl_set_index_bias( svga->hwtnl, -neg_bias );
    131    return PIPE_OK;
    132 }
    133 
    134 
    135 static enum pipe_error
    136 emit_hw_vdecl(struct svga_context *svga, unsigned dirty)
    137 {
    138    /* SVGA_NEW_NEED_SWTNL
    139     */
    140    if (svga->state.sw.need_swtnl)
    141       return PIPE_OK; /* Do not emit during swtnl */
    142 
    143    return emit_hw_vs_vdecl( svga, dirty );
    144 }
    145 
    146 
    147 struct svga_tracked_state svga_hw_vdecl =
    148 {
    149    "hw vertex decl state (hwtnl version)",
    150    ( SVGA_NEW_NEED_SWTNL |
    151      SVGA_NEW_VELEMENT |
    152      SVGA_NEW_VBUFFER |
    153      SVGA_NEW_RAST |
    154      SVGA_NEW_FS |
    155      SVGA_NEW_VS ),
    156    emit_hw_vdecl
    157 };
    158 
    159 
    160 
    161 
    162 
    163 
    164