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r600g: allow vs to write to gl_ViewportIndex

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Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Tested-by: Tobias Droste <tdroste@gmx.de>
This commit is contained in:
Ilia Mirkin 2014-07-02 12:16:01 -04:00
parent 556a415033
commit 313acb3ffa
1 changed files with 17 additions and 0 deletions
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17
src/gallium/drivers/r600/r600_shader.c
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@ -2042,6 +2042,23 @@ static int r600_shader_from_tgsi(struct r600_context *rctx,
output[j].type = V_SQ_CF_ALLOC_EXPORT_WORD0_SQ_EXPORT_POS;
pos_emitted = true;
break;
case TGSI_SEMANTIC_VIEWPORT_INDEX:
/* spi_sid is 0 for outputs that are
* not consumed by PS */
if (shader->output[i].spi_sid) {
output[j].array_base = next_param_base++;
output[j].type = V_SQ_CF_ALLOC_EXPORT_WORD0_SQ_EXPORT_PARAM;
j++;
memcpy(&output[j], &output[j-1], sizeof(struct r600_bytecode_output));
}
output[j].array_base = 61;
output[j].swizzle_x = 7;
output[j].swizzle_y = 7;
output[j].swizzle_z = 7;
output[j].swizzle_w = 0;
output[j].type = V_SQ_CF_ALLOC_EXPORT_WORD0_SQ_EXPORT_POS;
pos_emitted = true;
break;
case TGSI_SEMANTIC_CLIPVERTEX:
j--;
break;