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gallivm: use sampler index 0 for texel fetches
texel fetches don't use any samplers. Previously we just set the same number for both texture and sampler unit (as per "ordinary" gl style sampling where the numbers are always the same) however this would trigger some assertions checking that the sampler index isn't over PIPE_MAX_SAMPLERS limit elsewhere with d3d10, so just set to 0. (Fixing the assertion instead isn't really an option, the sampler isn't really used but might still pass an out-of-bound pointer around and even copy some things from it.) Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
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@ -2608,7 +2608,12 @@ emit_fetch_texels( struct lp_build_tgsi_soa_context *bld,
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params.type = bld->bld_base.base.type;
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params.sample_key = sample_key;
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params.texture_index = unit;
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params.sampler_index = unit;
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/*
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* sampler not actually used, set to 0 so it won't exceed PIPE_MAX_SAMPLERS
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* and trigger some assertions with d3d10 where the sampler view number
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* can exceed this.
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*/
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params.sampler_index = 0;
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params.context_ptr = bld->context_ptr;
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params.thread_data_ptr = bld->thread_data_ptr;
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params.coords = coords;
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