multiplanar_external_texture.cc | Explore in Territory

// Copyright 2021 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/wgsl/ast/transform/multiplanar_external_texture.h"

#include <string>
#include <vector>

#include "src/tint/lang/core/type/texture_dimension.h"
#include "src/tint/lang/wgsl/ast/function.h"
#include "src/tint/lang/wgsl/program/clone_context.h"
#include "src/tint/lang/wgsl/program/program_builder.h"
#include "src/tint/lang/wgsl/resolver/resolve.h"
#include "src/tint/lang/wgsl/sem/call.h"
#include "src/tint/lang/wgsl/sem/function.h"
#include "src/tint/lang/wgsl/sem/variable.h"

TINT_INSTANTIATE_TYPEINFO(…);
TINT_INSTANTIATE_TYPEINFO(…);

namespace tint::ast::transform {
namespace {

usingnamespacetint::core::fluent_types;     // NOLINT
usingnamespacetint::core::number_suffixes;  // NOLINT

bool ShouldRun(const Program& program) { … }

/// This struct stores symbols for new bindings created as a result of transforming a
/// texture_external instance.
struct NewBindingSymbols { … };
}  // namespace

/// PIMPL state for the transform
struct MultiplanarExternalTexture::State { … };

MultiplanarExternalTexture::NewBindingPoints::NewBindingPoints() = default;
MultiplanarExternalTexture::NewBindingPoints::NewBindingPoints(
    tint::transform::multiplanar::BindingsMap inputBindingsMap,
    bool may_collide)
    : … { … }

MultiplanarExternalTexture::NewBindingPoints::~NewBindingPoints() = default;

MultiplanarExternalTexture::MultiplanarExternalTexture() = default;
MultiplanarExternalTexture::~MultiplanarExternalTexture() = default;

// Within this transform, an instance of a texture_external binding is unpacked into two
// texture_2d<f32> bindings representing two possible planes of a single texture and a uniform
// buffer binding representing a struct of parameters. Calls to texture builtins that contain a
// texture_external parameter will be transformed into a newly generated version of the function,
// which can perform the desired operation on a single RGBA plane or on separate Y and UV planes.
Transform::ApplyResult MultiplanarExternalTexture::Apply(const Program& src,
                                                         const DataMap& inputs,
                                                         DataMap&) const { … }

}  // namespace tint::ast::transform
chromium/third_party/dawn/src/tint/lang/wgsl/ast/transform/multiplanar_external_texture.cc
