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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_helpers.h"
  27. #include "util/u_inlines.h"
  28. #include "pipe/p_defines.h"
  29. #include "util/u_math.h"
  30. #include "util/u_memory.h"
  31. #include "util/u_transfer.h"
  32. #include "tgsi/tgsi_parse.h"
  33.  
  34. #include "svga_screen.h"
  35. #include "svga_resource_buffer.h"
  36. #include "svga_context.h"
  37.  
  38.  
  39. static void svga_set_vertex_buffers(struct pipe_context *pipe,
  40.                                     unsigned start_slot, unsigned count,
  41.                                     const struct pipe_vertex_buffer *buffers)
  42. {
  43.    struct svga_context *svga = svga_context(pipe);
  44.  
  45.    util_set_vertex_buffers_count(svga->curr.vb,
  46.                                  &svga->curr.num_vertex_buffers,
  47.                                  buffers, start_slot, count);
  48.  
  49.    svga->dirty |= SVGA_NEW_VBUFFER;
  50. }
  51.  
  52.  
  53. static void svga_set_index_buffer(struct pipe_context *pipe,
  54.                                   const struct pipe_index_buffer *ib)
  55. {
  56.    struct svga_context *svga = svga_context(pipe);
  57.  
  58.    if (ib) {
  59.       pipe_resource_reference(&svga->curr.ib.buffer, ib->buffer);
  60.       memcpy(&svga->curr.ib, ib, sizeof(svga->curr.ib));
  61.    }
  62.    else {
  63.       pipe_resource_reference(&svga->curr.ib.buffer, NULL);
  64.       memset(&svga->curr.ib, 0, sizeof(svga->curr.ib));
  65.    }
  66.  
  67.    /* TODO make this more like a state */
  68. }
  69.  
  70.  
  71. /**
  72.  * Given a gallium vertex element format, return the corresponding SVGA3D
  73.  * format.  Return SVGA3D_DECLTYPE_MAX for unsupported gallium formats.
  74.  */
  75. static SVGA3dDeclType
  76. translate_vertex_format(enum pipe_format format)
  77. {
  78.    switch (format) {
  79.    case PIPE_FORMAT_R32_FLOAT:            return SVGA3D_DECLTYPE_FLOAT1;
  80.    case PIPE_FORMAT_R32G32_FLOAT:         return SVGA3D_DECLTYPE_FLOAT2;
  81.    case PIPE_FORMAT_R32G32B32_FLOAT:      return SVGA3D_DECLTYPE_FLOAT3;
  82.    case PIPE_FORMAT_R32G32B32A32_FLOAT:   return SVGA3D_DECLTYPE_FLOAT4;
  83.    case PIPE_FORMAT_B8G8R8A8_UNORM:       return SVGA3D_DECLTYPE_D3DCOLOR;
  84.    case PIPE_FORMAT_R8G8B8A8_USCALED:     return SVGA3D_DECLTYPE_UBYTE4;
  85.    case PIPE_FORMAT_R16G16_SSCALED:       return SVGA3D_DECLTYPE_SHORT2;
  86.    case PIPE_FORMAT_R16G16B16A16_SSCALED: return SVGA3D_DECLTYPE_SHORT4;
  87.    case PIPE_FORMAT_R8G8B8A8_UNORM:       return SVGA3D_DECLTYPE_UBYTE4N;
  88.    case PIPE_FORMAT_R16G16_SNORM:         return SVGA3D_DECLTYPE_SHORT2N;
  89.    case PIPE_FORMAT_R16G16B16A16_SNORM:   return SVGA3D_DECLTYPE_SHORT4N;
  90.    case PIPE_FORMAT_R16G16_UNORM:         return SVGA3D_DECLTYPE_USHORT2N;
  91.    case PIPE_FORMAT_R16G16B16A16_UNORM:   return SVGA3D_DECLTYPE_USHORT4N;
  92.    case PIPE_FORMAT_R10G10B10X2_USCALED:  return SVGA3D_DECLTYPE_UDEC3;
  93.    case PIPE_FORMAT_R10G10B10X2_SNORM:    return SVGA3D_DECLTYPE_DEC3N;
  94.    case PIPE_FORMAT_R16G16_FLOAT:         return SVGA3D_DECLTYPE_FLOAT16_2;
  95.    case PIPE_FORMAT_R16G16B16A16_FLOAT:   return SVGA3D_DECLTYPE_FLOAT16_4;
  96.  
  97.    /* See attrib_needs_adjustment() and attrib_needs_w_to_1() below */
  98.    case PIPE_FORMAT_R8G8B8_SNORM:         return SVGA3D_DECLTYPE_UBYTE4N;
  99.  
  100.    /* See attrib_needs_w_to_1() below */
  101.    case PIPE_FORMAT_R16G16B16_SNORM:      return SVGA3D_DECLTYPE_SHORT4N;
  102.    case PIPE_FORMAT_R16G16B16_UNORM:      return SVGA3D_DECLTYPE_USHORT4N;
  103.    case PIPE_FORMAT_R8G8B8_UNORM:         return SVGA3D_DECLTYPE_UBYTE4N;
  104.  
  105.    default:
  106.       /* There are many formats without hardware support.  This case
  107.        * will be hit regularly, meaning we'll need swvfetch.
  108.        */
  109.       return SVGA3D_DECLTYPE_MAX;
  110.    }
  111. }
  112.  
  113.  
  114. /**
  115.  * Does the given vertex attrib format need range adjustment in the VS?
  116.  * Range adjustment scales and biases values from [0,1] to [-1,1].
  117.  * This lets us avoid the swtnl path.
  118.  */
  119. static boolean
  120. attrib_needs_range_adjustment(enum pipe_format format)
  121. {
  122.    switch (format) {
  123.    case PIPE_FORMAT_R8G8B8_SNORM:
  124.       return TRUE;
  125.    default:
  126.       return FALSE;
  127.    }
  128. }
  129.  
  130.  
  131. /**
  132.  * Does the given vertex attrib format need to have the W component set
  133.  * to one in the VS?
  134.  */
  135. static boolean
  136. attrib_needs_w_to_1(enum pipe_format format)
  137. {
  138.    switch (format) {
  139.    case PIPE_FORMAT_R8G8B8_SNORM:
  140.    case PIPE_FORMAT_R8G8B8_UNORM:
  141.    case PIPE_FORMAT_R16G16B16_SNORM:
  142.    case PIPE_FORMAT_R16G16B16_UNORM:
  143.       return TRUE;
  144.    default:
  145.       return FALSE;
  146.    }
  147. }
  148.  
  149.  
  150. static void *
  151. svga_create_vertex_elements_state(struct pipe_context *pipe,
  152.                                   unsigned count,
  153.                                   const struct pipe_vertex_element *attribs)
  154. {
  155.    struct svga_velems_state *velems;
  156.    assert(count <= PIPE_MAX_ATTRIBS);
  157.    velems = (struct svga_velems_state *) MALLOC(sizeof(struct svga_velems_state));
  158.    if (velems) {
  159.       unsigned i;
  160.  
  161.       velems->count = count;
  162.       memcpy(velems->velem, attribs, sizeof(*attribs) * count);
  163.  
  164.       velems->need_swvfetch = FALSE;
  165.       velems->adjust_attrib_range = 0x0;
  166.       velems->adjust_attrib_w_1 = 0x0;
  167.  
  168.       /* Translate Gallium vertex format to SVGA3dDeclType */
  169.       for (i = 0; i < count; i++) {
  170.          enum pipe_format f = attribs[i].src_format;
  171.          velems->decl_type[i] = translate_vertex_format(f);
  172.          if (velems->decl_type[i] == SVGA3D_DECLTYPE_MAX) {
  173.             /* Unsupported format - use software fetch */
  174.             velems->need_swvfetch = TRUE;
  175.             break;
  176.          }
  177.  
  178.          if (attrib_needs_range_adjustment(f)) {
  179.             velems->adjust_attrib_range |= (1 << i);
  180.          }
  181.          if (attrib_needs_w_to_1(f)) {
  182.             velems->adjust_attrib_w_1 |= (1 << i);
  183.          }
  184.       }
  185.    }
  186.    return velems;
  187. }
  188.  
  189. static void svga_bind_vertex_elements_state(struct pipe_context *pipe,
  190.                                             void *velems)
  191. {
  192.    struct svga_context *svga = svga_context(pipe);
  193.    struct svga_velems_state *svga_velems = (struct svga_velems_state *) velems;
  194.  
  195.    svga->curr.velems = svga_velems;
  196.    svga->dirty |= SVGA_NEW_VELEMENT;
  197. }
  198.  
  199. static void svga_delete_vertex_elements_state(struct pipe_context *pipe,
  200.                                               void *velems)
  201. {
  202.    FREE(velems);
  203. }
  204.  
  205. void svga_cleanup_vertex_state( struct svga_context *svga )
  206. {
  207.    unsigned i;
  208.    
  209.    for (i = 0 ; i < svga->curr.num_vertex_buffers; i++)
  210.       pipe_resource_reference(&svga->curr.vb[i].buffer, NULL);
  211. }
  212.  
  213.  
  214. void svga_init_vertex_functions( struct svga_context *svga )
  215. {
  216.    svga->pipe.set_vertex_buffers = svga_set_vertex_buffers;
  217.    svga->pipe.set_index_buffer = svga_set_index_buffer;
  218.    svga->pipe.create_vertex_elements_state = svga_create_vertex_elements_state;
  219.    svga->pipe.bind_vertex_elements_state = svga_bind_vertex_elements_state;
  220.    svga->pipe.delete_vertex_elements_state = svga_delete_vertex_elements_state;
  221. }
  222.  
  223.  
  224.