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// Copyright 2020 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef SRC_AST_STORAGE_TEXTURE_H_
#define SRC_AST_STORAGE_TEXTURE_H_
#include <string>
#include "src/ast/access.h"
#include "src/ast/texture.h"
namespace tint {
namespace ast {
/// The texel format in the storage texture
enum class TexelFormat {
kNone = -1,
kRgba8Unorm,
kRgba8Snorm,
kRgba8Uint,
kRgba8Sint,
kRgba16Uint,
kRgba16Sint,
kRgba16Float,
kR32Uint,
kR32Sint,
kR32Float,
kRg32Uint,
kRg32Sint,
kRg32Float,
kRgba32Uint,
kRgba32Sint,
kRgba32Float,
};
/// @param out the std::ostream to write to
/// @param format the TexelFormat
/// @return the std::ostream so calls can be chained
std::ostream& operator<<(std::ostream& out, TexelFormat format);
/// A storage texture type.
class StorageTexture : public Castable<StorageTexture, Texture> {
public:
/// Constructor
/// @param pid the identifier of the program that owns this node
/// @param src the source of this node
/// @param dim the dimensionality of the texture
/// @param format the image format of the texture
/// @param subtype the storage subtype. Use SubtypeFor() to calculate this.
/// @param access_control the access control for the texture.
StorageTexture(ProgramID pid,
const Source& src,
TextureDimension dim,
TexelFormat format,
const Type* subtype,
Access access_control);
/// Move constructor
StorageTexture(StorageTexture&&);
~StorageTexture() override;
/// @param symbols the program's symbol table
/// @returns the name for this type that closely resembles how it would be
/// declared in WGSL.
std::string FriendlyName(const SymbolTable& symbols) const override;
/// Clones this type and all transitive types using the `CloneContext` `ctx`.
/// @param ctx the clone context
/// @return the newly cloned type
const StorageTexture* Clone(CloneContext* ctx) const override;
/// @param format the storage texture image format
/// @param builder the ProgramBuilder used to build the returned type
/// @returns the storage texture subtype for the given TexelFormat
static Type* SubtypeFor(TexelFormat format, ProgramBuilder& builder);
/// The image format
const TexelFormat format;
/// The storage subtype
const Type* const type;
/// The access control
const Access access;
};
} // namespace ast
} // namespace tint
#endif // SRC_AST_STORAGE_TEXTURE_H_