multiplanar_external_texture.h | Explore in Territory

// Copyright 2021 The Dawn & Tint Authors
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#ifndef SRC_TINT_LANG_WGSL_AST_TRANSFORM_MULTIPLANAR_EXTERNAL_TEXTURE_H_
#define SRC_TINT_LANG_WGSL_AST_TRANSFORM_MULTIPLANAR_EXTERNAL_TEXTURE_H_

#include <unordered_map>
#include <utility>

#include "src/tint/api/common/binding_point.h"
#include "src/tint/lang/core/builtin_fn.h"
#include "src/tint/lang/core/common/multiplanar_options.h"
#include "src/tint/lang/wgsl/ast/struct_member.h"
#include "src/tint/lang/wgsl/ast/transform/transform.h"

namespace tint::ast::transform {

/// Within the MultiplanarExternalTexture transform, each instance of a
/// texture_external binding is unpacked into two texture_2d<f32> bindings
/// representing two possible planes of a texture and a uniform buffer binding
/// representing a struct of parameters. Calls to textureLoad or
/// textureSampleLevel 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, and do colorspace conversions including yuv->rgb conversion, gamma
/// decoding, gamut conversion, and gamma encoding steps. Specifically
// for BT.709 to SRGB conversion, it takes the fast path only doing the yuv->rgb
// step and skipping all other steps.
class MultiplanarExternalTexture final : public Castable<MultiplanarExternalTexture, Transform> { … };

}  // namespace tint::ast::transform

#endif  // SRC_TINT_LANG_WGSL_AST_TRANSFORM_MULTIPLANAR_EXTERNAL_TEXTURE_H_
chromium/third_party/dawn/src/tint/lang/wgsl/ast/transform/multiplanar_external_texture.h
