src/gallium/drivers/svga/svga_pipe_vertex.c

   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