blob: ad386311561508c25f63443b3e49ea6669923717 [file] [log] [blame]
// Copyright 2023 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "src/tint/lang/spirv/writer/helpers/generate_bindings.h"
#include <algorithm>
#include "src/tint/api/common/binding_point.h"
#include "src/tint/lang/core/ir/module.h"
#include "src/tint/lang/core/ir/var.h"
#include "src/tint/lang/core/type/external_texture.h"
#include "src/tint/lang/core/type/pointer.h"
#include "src/tint/lang/core/type/storage_texture.h"
#include "src/tint/utils/containers/hashmap.h"
#include "src/tint/utils/containers/vector.h"
#include "src/tint/utils/rtti/switch.h"
namespace tint::spirv::writer {
Bindings GenerateBindings(const core::ir::Module& module) {
Bindings bindings{};
if (!module.root_block) {
return bindings;
}
// Collect next valid binding number per group
Hashmap<uint32_t, uint32_t, 4> group_to_next_binding_number;
Vector<tint::BindingPoint, 4> ext_tex_bps;
for (auto* inst : *module.root_block) {
if (!inst->Alive()) {
continue;
}
auto* var = inst->As<core::ir::Var>();
if (auto bp = var->BindingPoint()) {
if (auto val = group_to_next_binding_number.Get(bp->group)) {
*val = std::max(*val, bp->binding + 1);
} else {
group_to_next_binding_number.Add(bp->group, bp->binding + 1);
}
auto* ptr = var->Result(0)->Type()->As<core::type::Pointer>();
auto* ty = ptr->UnwrapPtr();
// Store up the external textures, we'll add them in the next step
if (ty->Is<core::type::ExternalTexture>()) {
ext_tex_bps.Push(*bp);
continue;
}
binding::BindingInfo info{bp->group, bp->binding};
switch (ptr->AddressSpace()) {
case core::AddressSpace::kHandle:
Switch(
ptr->UnwrapPtr(), //
[&](const core::type::Sampler*) { bindings.sampler.emplace(*bp, info); },
[&](const core::type::StorageTexture*) {
bindings.storage_texture.emplace(*bp, info);
},
[&](const core::type::Texture*) { bindings.texture.emplace(*bp, info); });
break;
case core::AddressSpace::kStorage:
bindings.storage.emplace(*bp, info);
break;
case core::AddressSpace::kUniform:
bindings.uniform.emplace(*bp, info);
break;
case core::AddressSpace::kUndefined:
case core::AddressSpace::kPixelLocal:
case core::AddressSpace::kPrivate:
case core::AddressSpace::kPushConstant:
case core::AddressSpace::kIn:
case core::AddressSpace::kOut:
case core::AddressSpace::kFunction:
case core::AddressSpace::kWorkgroup:
break;
}
}
}
for (auto bp : ext_tex_bps) {
uint32_t g = bp.group;
uint32_t& next_num = group_to_next_binding_number.GetOrAddZero(g);
binding::BindingInfo plane0{bp.group, bp.binding};
binding::BindingInfo plane1{g, next_num++};
binding::BindingInfo metadata{g, next_num++};
bindings.external_texture.emplace(bp, binding::ExternalTexture{metadata, plane0, plane1});
}
return bindings;
}
} // namespace tint::spirv::writer