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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 "draw/draw_context.h"
  27. #include "draw/draw_vbuf.h"
  28. #include "util/u_inlines.h"
  29. #include "pipe/p_state.h"
  30.  
  31. #include "svga_context.h"
  32. #include "svga_swtnl.h"
  33. #include "svga_state.h"
  34. #include "svga_tgsi.h"
  35. #include "svga_swtnl_private.h"
  36.  
  37.  
  38. #define SVGA_POINT_ADJ_X -0.375f
  39. #define SVGA_POINT_ADJ_Y -0.5f
  40.  
  41. #define SVGA_LINE_ADJ_X -0.5f
  42. #define SVGA_LINE_ADJ_Y -0.5f
  43.  
  44. #define SVGA_TRIANGLE_ADJ_X -0.375f
  45. #define SVGA_TRIANGLE_ADJ_Y -0.5f
  46.  
  47.  
  48. static void set_draw_viewport( struct svga_context *svga )
  49. {
  50.    struct pipe_viewport_state vp = svga->curr.viewport;
  51.    float adjx = 0.0f;
  52.    float adjy = 0.0f;
  53.  
  54.    switch (svga->curr.reduced_prim) {
  55.    case PIPE_PRIM_POINTS:
  56.       adjx = SVGA_POINT_ADJ_X;
  57.       adjy = SVGA_POINT_ADJ_Y;
  58.       break;
  59.    case PIPE_PRIM_LINES:
  60.       /* XXX: This is to compensate for the fact that wide lines are
  61.        * going to be drawn with triangles, but we're not catching all
  62.        * cases where that will happen.
  63.        */
  64.       if (svga->curr.rast->need_pipeline & SVGA_PIPELINE_FLAG_LINES)
  65.       {
  66.          adjx = SVGA_LINE_ADJ_X + 0.175f;
  67.          adjy = SVGA_LINE_ADJ_Y - 0.175f;
  68.       }
  69.       else {
  70.          adjx = SVGA_LINE_ADJ_X;
  71.          adjy = SVGA_LINE_ADJ_Y;
  72.       }
  73.       break;
  74.    case PIPE_PRIM_TRIANGLES:
  75.       adjx += SVGA_TRIANGLE_ADJ_X;
  76.       adjy += SVGA_TRIANGLE_ADJ_Y;
  77.       break;
  78.    }
  79.  
  80.    vp.translate[0] += adjx;
  81.    vp.translate[1] += adjy;
  82.  
  83.    draw_set_viewport_states(svga->swtnl.draw, 0, 1, &vp);
  84. }
  85.  
  86. static enum pipe_error
  87. update_swtnl_draw( struct svga_context *svga,
  88.                    unsigned dirty )
  89. {
  90.    draw_flush( svga->swtnl.draw );
  91.  
  92.    if (dirty & SVGA_NEW_VS)
  93.       draw_bind_vertex_shader(svga->swtnl.draw,
  94.                               svga->curr.vs->draw_shader);
  95.  
  96.    if (dirty & SVGA_NEW_FS)
  97.       draw_bind_fragment_shader(svga->swtnl.draw,
  98.                                 svga->curr.fs->draw_shader);
  99.  
  100.    if (dirty & SVGA_NEW_VBUFFER)
  101.       draw_set_vertex_buffers(svga->swtnl.draw, 0,
  102.                               svga->curr.num_vertex_buffers,
  103.                               svga->curr.vb);
  104.  
  105.    if (dirty & SVGA_NEW_VELEMENT)
  106.       draw_set_vertex_elements(svga->swtnl.draw,
  107.                                svga->curr.velems->count,
  108.                                svga->curr.velems->velem );
  109.  
  110.    if (dirty & SVGA_NEW_CLIP)
  111.       draw_set_clip_state(svga->swtnl.draw,
  112.                           &svga->curr.clip);
  113.  
  114.    if (dirty & (SVGA_NEW_VIEWPORT |
  115.                 SVGA_NEW_REDUCED_PRIMITIVE |
  116.                 SVGA_NEW_RAST))
  117.       set_draw_viewport( svga );
  118.  
  119.    if (dirty & SVGA_NEW_RAST)
  120.       draw_set_rasterizer_state(svga->swtnl.draw,
  121.                                 &svga->curr.rast->templ,
  122.                                 (void *) svga->curr.rast);
  123.  
  124.    if (dirty & SVGA_NEW_FRAME_BUFFER)
  125.       draw_set_mrd(svga->swtnl.draw,
  126.                    svga->curr.depthscale);
  127.  
  128.    return 0;
  129. }
  130.  
  131.  
  132. struct svga_tracked_state svga_update_swtnl_draw =
  133. {
  134.    "update draw module state",
  135.    (SVGA_NEW_VS |
  136.     SVGA_NEW_VBUFFER |
  137.     SVGA_NEW_VELEMENT |
  138.     SVGA_NEW_CLIP |
  139.     SVGA_NEW_VIEWPORT |
  140.     SVGA_NEW_RAST |
  141.     SVGA_NEW_FRAME_BUFFER |
  142.     SVGA_NEW_REDUCED_PRIMITIVE),
  143.    update_swtnl_draw
  144. };
  145.  
  146.  
  147. enum pipe_error
  148. svga_swtnl_update_vdecl( struct svga_context *svga )
  149. {
  150.    struct svga_vbuf_render *svga_render = svga_vbuf_render(svga->swtnl.backend);
  151.    struct draw_context *draw = svga->swtnl.draw;
  152.    struct vertex_info *vinfo = &svga_render->vertex_info;
  153.    SVGA3dVertexDecl vdecl[PIPE_MAX_ATTRIBS];
  154.    const enum interp_mode colorInterp =
  155.       svga->curr.rast->templ.flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
  156.    struct svga_fragment_shader *fs = svga->curr.fs;
  157.    int offset = 0;
  158.    int nr_decls = 0;
  159.    int src;
  160.    unsigned i;
  161.  
  162.    memset(vinfo, 0, sizeof(*vinfo));
  163.    memset(vdecl, 0, sizeof(vdecl));
  164.  
  165.    /* always add position */
  166.    src = draw_find_shader_output(draw, TGSI_SEMANTIC_POSITION, 0);
  167.    draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_LINEAR, src);
  168.    vinfo->attrib[0].emit = EMIT_4F;
  169.    vdecl[0].array.offset = offset;
  170.    vdecl[0].identity.type = SVGA3D_DECLTYPE_FLOAT4;
  171.    vdecl[0].identity.usage = SVGA3D_DECLUSAGE_POSITIONT;
  172.    vdecl[0].identity.usageIndex = 0;
  173.    offset += 16;
  174.    nr_decls++;
  175.  
  176.    for (i = 0; i < fs->base.info.num_inputs; i++) {
  177.       const unsigned sem_name = fs->base.info.input_semantic_name[i];
  178.       const unsigned sem_index = fs->base.info.input_semantic_index[i];
  179.  
  180.       src = draw_find_shader_output(draw, sem_name, sem_index);
  181.  
  182.       vdecl[nr_decls].array.offset = offset;
  183.       vdecl[nr_decls].identity.usageIndex = sem_index;
  184.  
  185.       switch (sem_name) {
  186.       case TGSI_SEMANTIC_COLOR:
  187.          draw_emit_vertex_attr(vinfo, EMIT_4F, colorInterp, src);
  188.          vdecl[nr_decls].identity.usage = SVGA3D_DECLUSAGE_COLOR;
  189.          vdecl[nr_decls].identity.type = SVGA3D_DECLTYPE_FLOAT4;
  190.          offset += 16;
  191.          nr_decls++;
  192.          break;
  193.       case TGSI_SEMANTIC_GENERIC:
  194.          draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, src);
  195.          vdecl[nr_decls].identity.usage = SVGA3D_DECLUSAGE_TEXCOORD;
  196.          vdecl[nr_decls].identity.type = SVGA3D_DECLTYPE_FLOAT4;
  197.          vdecl[nr_decls].identity.usageIndex =
  198.             svga_remap_generic_index(fs->generic_remap_table, sem_index);
  199.          offset += 16;
  200.          nr_decls++;
  201.          break;
  202.       case TGSI_SEMANTIC_FOG:
  203.          draw_emit_vertex_attr(vinfo, EMIT_1F, INTERP_PERSPECTIVE, src);
  204.          vdecl[nr_decls].identity.usage = SVGA3D_DECLUSAGE_TEXCOORD;
  205.          vdecl[nr_decls].identity.type = SVGA3D_DECLTYPE_FLOAT1;
  206.          assert(vdecl[nr_decls].identity.usageIndex == 0);
  207.          offset += 4;
  208.          nr_decls++;
  209.          break;
  210.       case TGSI_SEMANTIC_POSITION:
  211.          /* generated internally, not a vertex shader output */
  212.          break;
  213.       default:
  214.          assert(0);
  215.       }
  216.    }
  217.  
  218.    draw_compute_vertex_size(vinfo);
  219.  
  220.    svga_render->vdecl_count = nr_decls;
  221.    for (i = 0; i < svga_render->vdecl_count; i++)
  222.       vdecl[i].array.stride = offset;
  223.  
  224.    if (memcmp(svga_render->vdecl, vdecl, sizeof(vdecl)) == 0)
  225.       return 0;
  226.  
  227.    memcpy(svga_render->vdecl, vdecl, sizeof(vdecl));
  228.    svga->swtnl.new_vdecl = TRUE;
  229.  
  230.    return 0;
  231. }
  232.  
  233.  
  234. static enum pipe_error
  235. update_swtnl_vdecl( struct svga_context *svga,
  236.                     unsigned dirty )
  237. {
  238.    return svga_swtnl_update_vdecl( svga );
  239. }
  240.  
  241.  
  242. struct svga_tracked_state svga_update_swtnl_vdecl =
  243. {
  244.    "update draw module vdecl",
  245.    (SVGA_NEW_VS |
  246.     SVGA_NEW_FS),
  247.    update_swtnl_vdecl
  248. };
  249.