/**
* Translate TGSI semantic info into SVGA3d semantic info.
* This is called for VS outputs and PS inputs only.
*/
static boolean
translate_vs_ps_semantic(struct svga_shader_emitter *emit,
struct tgsi_declaration_semantic semantic,
unsigned *usage,
unsigned *idx)
{
switch (semantic.Name) {
case TGSI_SEMANTIC_POSITION:
*idx = semantic.Index;
*usage = SVGA3D_DECLUSAGE_POSITION;
break;
case TGSI_SEMANTIC_COLOR:
*idx = semantic.Index;
*usage = SVGA3D_DECLUSAGE_COLOR;
break;
case TGSI_SEMANTIC_BCOLOR:
*idx = semantic.Index + 2; /* sharing with COLOR */
*usage = SVGA3D_DECLUSAGE_COLOR;
break;
case TGSI_SEMANTIC_FOG:
*idx = 0;
assert(semantic.Index == 0);
*usage = SVGA3D_DECLUSAGE_TEXCOORD;
break;
case TGSI_SEMANTIC_PSIZE:
*idx = semantic.Index;
*usage = SVGA3D_DECLUSAGE_PSIZE;
break;
case TGSI_SEMANTIC_GENERIC:
*idx = svga_remap_generic_index(emit->key.generic_remap_table,
semantic.Index);
*usage = SVGA3D_DECLUSAGE_TEXCOORD;
break;
case TGSI_SEMANTIC_NORMAL:
*idx = semantic.Index;
*usage = SVGA3D_DECLUSAGE_NORMAL;
break;
case TGSI_SEMANTIC_CLIPDIST:
case TGSI_SEMANTIC_CLIPVERTEX:
/* XXX at this time we don't support clip distance or clip vertices */
debug_warn_once("unsupported clip distance/vertex attribute\n");
*usage = SVGA3D_DECLUSAGE_TEXCOORD;
*idx = 0;
return TRUE;
default:
assert(0);
*usage = SVGA3D_DECLUSAGE_TEXCOORD;
*idx = 0;
return FALSE;
}
return TRUE;
}
enum pipe_error
svga_swtnl_update_vdecl( struct svga_context *svga )
{
struct svga_vbuf_render *svga_render = svga_vbuf_render(svga->swtnl.backend);
struct draw_context *draw = svga->swtnl.draw;
struct vertex_info *vinfo = &svga_render->vertex_info;
SVGA3dVertexDecl vdecl[PIPE_MAX_ATTRIBS];
const enum interp_mode colorInterp =
svga->curr.rast->templ.flatshade ? INTERP_CONSTANT : INTERP_LINEAR;
struct svga_fragment_shader *fs = svga->curr.fs;
int offset = 0;
int nr_decls = 0;
int src;
unsigned i;
memset(vinfo, 0, sizeof(*vinfo));
memset(vdecl, 0, sizeof(vdecl));
/* always add position */
src = draw_find_shader_output(draw, TGSI_SEMANTIC_POSITION, 0);
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_LINEAR, src);
vinfo->attrib[0].emit = EMIT_4F;
vdecl[0].array.offset = offset;
vdecl[0].identity.type = SVGA3D_DECLTYPE_FLOAT4;
vdecl[0].identity.usage = SVGA3D_DECLUSAGE_POSITIONT;
vdecl[0].identity.usageIndex = 0;
offset += 16;
nr_decls++;
for (i = 0; i < fs->base.info.num_inputs; i++) {
const unsigned sem_name = fs->base.info.input_semantic_name[i];
const unsigned sem_index = fs->base.info.input_semantic_index[i];
src = draw_find_shader_output(draw, sem_name, sem_index);
vdecl[nr_decls].array.offset = offset;
vdecl[nr_decls].identity.usageIndex = sem_index;
switch (sem_name) {
case TGSI_SEMANTIC_COLOR:
draw_emit_vertex_attr(vinfo, EMIT_4F, colorInterp, src);
vdecl[nr_decls].identity.usage = SVGA3D_DECLUSAGE_COLOR;
vdecl[nr_decls].identity.type = SVGA3D_DECLTYPE_FLOAT4;
offset += 16;
nr_decls++;
break;
case TGSI_SEMANTIC_GENERIC:
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, src);
vdecl[nr_decls].identity.usage = SVGA3D_DECLUSAGE_TEXCOORD;
vdecl[nr_decls].identity.type = SVGA3D_DECLTYPE_FLOAT4;
vdecl[nr_decls].identity.usageIndex =
svga_remap_generic_index(fs->generic_remap_table, sem_index);
offset += 16;
nr_decls++;
break;
case TGSI_SEMANTIC_FOG:
draw_emit_vertex_attr(vinfo, EMIT_1F, INTERP_PERSPECTIVE, src);
vdecl[nr_decls].identity.usage = SVGA3D_DECLUSAGE_TEXCOORD;
vdecl[nr_decls].identity.type = SVGA3D_DECLTYPE_FLOAT1;
assert(vdecl[nr_decls].identity.usageIndex == 0);
offset += 4;
nr_decls++;
break;
case TGSI_SEMANTIC_POSITION:
/* generated internally, not a vertex shader output */
break;
default:
assert(0);
}
}
draw_compute_vertex_size(vinfo);
svga_render->vdecl_count = nr_decls;
for (i = 0; i < svga_render->vdecl_count; i++)
vdecl[i].array.stride = offset;
if (memcmp(svga_render->vdecl, vdecl, sizeof(vdecl)) == 0)
return 0;
memcpy(svga_render->vdecl, vdecl, sizeof(vdecl));
svga->swtnl.new_vdecl = TRUE;
return 0;
}
