spirv: Use explicit lods outside of fragment shaders

This commit is contained in:
ReinUsesLisp 2021-04-17 03:07:31 -03:00 committed by ameerj
parent dbbd4b5496
commit 7cfa403683

View file

@ -310,11 +310,22 @@ Id EmitBoundImageWrite(EmitContext&) {
Id EmitImageSampleImplicitLod(EmitContext& ctx, IR::Inst* inst, const IR::Value& index, Id coords,
Id bias_lc, const IR::Value& offset) {
const auto info{inst->Flags<IR::TextureInstInfo>()};
const ImageOperands operands(ctx, info.has_bias != 0, false, info.has_lod_clamp != 0, bias_lc,
offset);
return Emit(&EmitContext::OpImageSparseSampleImplicitLod,
&EmitContext::OpImageSampleImplicitLod, ctx, inst, ctx.F32[4], Texture(ctx, index),
coords, operands.Mask(), operands.Span());
if (ctx.stage == Stage::Fragment) {
const ImageOperands operands(ctx, info.has_bias != 0, false, info.has_lod_clamp != 0,
bias_lc, offset);
return Emit(&EmitContext::OpImageSparseSampleImplicitLod,
&EmitContext::OpImageSampleImplicitLod, ctx, inst, ctx.F32[4],
Texture(ctx, index), coords, operands.Mask(), operands.Span());
} else {
// We can't use implicit lods on non-fragment stages on SPIR-V. Maxwell hardware behaves as
// if the lod was explicitly zero. This may change on Turing with implicit compute
// derivatives
const Id lod{ctx.Const(0)};
const ImageOperands operands(ctx, false, true, info.has_lod_clamp != 0, lod, offset);
return Emit(&EmitContext::OpImageSparseSampleExplicitLod,
&EmitContext::OpImageSampleExplicitLod, ctx, inst, ctx.F32[4],
Texture(ctx, index), coords, operands.Mask(), operands.Span());
}
}
Id EmitImageSampleExplicitLod(EmitContext& ctx, IR::Inst* inst, const IR::Value& index, Id coords,