| // Copyright 2024 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/glsl/writer/helpers/generate_bindings.h" |
| |
| #include <algorithm> |
| #include <unordered_set> |
| |
| #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/lang/glsl/writer/common/options.h" |
| #include "src/tint/lang/wgsl/ast/module.h" |
| #include "src/tint/lang/wgsl/program/program.h" |
| #include "src/tint/lang/wgsl/sem/variable.h" |
| #include "src/tint/utils/rtti/switch.h" |
| |
| namespace tint::glsl::writer { |
| |
| Bindings GenerateBindings(const core::ir::Module& module) { |
| Bindings bindings{}; |
| |
| std::unordered_set<tint::BindingPoint> seen_binding_points; |
| |
| // 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) { |
| 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_type = var->Result(0)->Type()->As<core::type::Pointer>(); |
| |
| // Store up the external textures, we'll add them in the next step |
| if (ptr_type->StoreType()->Is<core::type::ExternalTexture>()) { |
| ext_tex_bps.Push(*bp); |
| continue; |
| } |
| |
| binding::BindingInfo info{bp->binding}; |
| switch (ptr_type->AddressSpace()) { |
| case core::AddressSpace::kHandle: |
| Switch( |
| ptr_type->StoreType(), // |
| [&](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.binding}; |
| binding::BindingInfo plane1{next_num++}; |
| binding::BindingInfo metadata{next_num++}; |
| |
| group_to_next_binding_number.Replace(g, next_num); |
| |
| bindings.external_texture.emplace(bp, binding::ExternalTexture{metadata, plane0, plane1}); |
| } |
| |
| return bindings; |
| } |
| |
| Bindings GenerateBindings(const Program& program) { |
| // TODO(tint:1491): Use Inspector once we can get binding info for all |
| // variables, not just those referenced by entry points. |
| |
| Bindings bindings{}; |
| |
| std::unordered_set<tint::BindingPoint> seen_binding_points; |
| |
| // 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* var : program.AST().GlobalVariables()) { |
| if (auto* sem_var = program.Sem().Get(var)->As<sem::GlobalVariable>()) { |
| if (auto bp = sem_var->Attributes().binding_point) { |
| 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); |
| } |
| |
| // Store up the external textures, we'll add them in the next step |
| if (sem_var->Type()->UnwrapRef()->Is<core::type::ExternalTexture>()) { |
| ext_tex_bps.Push(*bp); |
| continue; |
| } |
| |
| binding::BindingInfo info{bp->binding}; |
| switch (sem_var->AddressSpace()) { |
| case core::AddressSpace::kHandle: |
| Switch( |
| sem_var->Type()->UnwrapRef(), // |
| [&](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.binding}; |
| binding::BindingInfo plane1{next_num++}; |
| binding::BindingInfo metadata{next_num++}; |
| |
| group_to_next_binding_number.Replace(g, next_num); |
| |
| bindings.external_texture.emplace(bp, binding::ExternalTexture{metadata, plane0, plane1}); |
| } |
| |
| return bindings; |
| } |
| |
| } // namespace tint::glsl::writer |
