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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. #include "svga_hw_reg.h"
  38.  
  39.  
  40.  
  41. static enum pipe_error
  42. emit_hw_vs_vdecl(struct svga_context *svga, unsigned dirty)
  43. {
  44.    const struct pipe_vertex_element *ve = svga->curr.velems->velem;
  45.    unsigned i;
  46.    unsigned neg_bias = 0;
  47.  
  48.    assert(svga->curr.velems->count >=
  49.           svga->curr.vs->base.info.file_count[TGSI_FILE_INPUT]);
  50.  
  51.    /* specify number of vertex element declarations to come */
  52.    svga_hwtnl_reset_vdecl( svga->hwtnl,
  53.                            svga->curr.velems->count );
  54.  
  55.    /**
  56.     * We can't set the VDECL offset to something negative, so we
  57.     * must calculate a common negative additional index bias, and modify
  58.     * the VDECL offsets accordingly so they *all* end up positive.
  59.     *
  60.     * Note that the exact value of the negative index bias is not that
  61.     * important, since we compensate for it when we calculate the vertex
  62.     * buffer offset below. The important thing is that all vertex buffer
  63.     * offsets remain positive.
  64.     *
  65.     * Note that we use a negative bias variable in order to make the
  66.     * rounding maths more easy to follow, and to avoid int / unsigned
  67.     * confusion.
  68.     */
  69.  
  70.    for (i = 0; i < svga->curr.velems->count; i++) {
  71.       const struct pipe_vertex_buffer *vb =
  72.          &svga->curr.vb[ve[i].vertex_buffer_index];
  73.       const struct svga_buffer *buffer;
  74.       unsigned int offset = vb->buffer_offset + ve[i].src_offset;
  75.  
  76.       if (!vb->buffer)
  77.          continue;
  78.  
  79.       buffer = svga_buffer(vb->buffer);
  80.       if (buffer->uploaded.start > offset) {
  81.          unsigned tmp_neg_bias = buffer->uploaded.start - offset;
  82.          if (vb->stride)
  83.             tmp_neg_bias = (tmp_neg_bias + vb->stride - 1) / vb->stride;
  84.          neg_bias = MAX2(neg_bias, tmp_neg_bias);
  85.       }
  86.    }
  87.  
  88.    for (i = 0; i < svga->curr.velems->count; i++) {
  89.       const struct pipe_vertex_buffer *vb =
  90.          &svga->curr.vb[ve[i].vertex_buffer_index];
  91.       unsigned usage, index;
  92.       const struct svga_buffer *buffer;
  93.       SVGA3dVertexDecl decl;
  94.  
  95.       if (!vb->buffer)
  96.          continue;
  97.  
  98.       buffer = svga_buffer(vb->buffer);
  99.       svga_generate_vdecl_semantics( i, &usage, &index );
  100.  
  101.       /* SVGA_NEW_VELEMENT
  102.        */
  103.       decl.identity.type = svga->curr.velems->decl_type[i];
  104.       decl.identity.method = SVGA3D_DECLMETHOD_DEFAULT;
  105.       decl.identity.usage = usage;
  106.       decl.identity.usageIndex = index;
  107.       decl.array.stride = vb->stride;
  108.  
  109.       /* Compensate for partially uploaded vbo, and
  110.        * for the negative index bias.
  111.        */
  112.       decl.array.offset = (vb->buffer_offset
  113.                            + ve[i].src_offset
  114.                            + neg_bias * vb->stride
  115.                            - buffer->uploaded.start);
  116.  
  117.       assert(decl.array.offset >= 0);
  118.  
  119.       svga_hwtnl_vdecl( svga->hwtnl,
  120.                         i,
  121.                         &decl,
  122.                         buffer->uploaded.buffer ? buffer->uploaded.buffer :
  123.                         vb->buffer );
  124.    }
  125.  
  126.    svga_hwtnl_set_index_bias( svga->hwtnl, -(int) neg_bias );
  127.    return PIPE_OK;
  128. }
  129.  
  130.  
  131. static enum pipe_error
  132. emit_hw_vdecl(struct svga_context *svga, unsigned dirty)
  133. {
  134.    /* SVGA_NEW_NEED_SWTNL
  135.     */
  136.    if (svga->state.sw.need_swtnl)
  137.       return PIPE_OK; /* Do not emit during swtnl */
  138.  
  139.    return emit_hw_vs_vdecl( svga, dirty );
  140. }
  141.  
  142.  
  143. struct svga_tracked_state svga_hw_vdecl =
  144. {
  145.    "hw vertex decl state (hwtnl version)",
  146.    ( SVGA_NEW_NEED_SWTNL |
  147.      SVGA_NEW_VELEMENT |
  148.      SVGA_NEW_VBUFFER |
  149.      SVGA_NEW_RAST |
  150.      SVGA_NEW_FS |
  151.      SVGA_NEW_VS ),
  152.    emit_hw_vdecl
  153. };
  154.