chromium/third_party/dawn/src/tint/lang/hlsl/writer/ast_raise/pixel_local.h

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#ifndef SRC_TINT_LANG_HLSL_WRITER_AST_RAISE_PIXEL_LOCAL_H_
#define SRC_TINT_LANG_HLSL_WRITER_AST_RAISE_PIXEL_LOCAL_H_

#include <string>

#include "src/tint/lang/core/texel_format.h"
#include "src/tint/lang/wgsl/ast/internal_attribute.h"
#include "src/tint/lang/wgsl/ast/transform/transform.h"

namespace tint::hlsl::writer {

/// PixelLocal transforms module-scope `var<pixel_local>`s and fragment entry point functions that
/// use them:
/// * `var<pixel_local>` will be transformed to `var<private>`, a bunch of read-write storage
///   textures with a special `RasterizerOrderedView` attribute, a function to read the data from
///   thes read-write storage textures into the `var<private>` (ROV Reader), and a function to write
///   the data from the `var<private>` into the read-write storage textures (ROV Writer).
/// * The entry point function will be wrapped with another function ('outer') that calls the
///  'inner' function.
/// * The outer function will always have `@builtin(position)` in its input parameters.
/// * The outer function will call the ROV reader before the original entry point function, and call
///   the ROV writer after the original entry point function.
/// @note PixelLocal requires that the SingleEntryPoint transform has already been run
/// TODO(tint:2083): Optimize this in the future by inserting the load as late as possible and the
/// store as early as possible.
class PixelLocal final : public Castable<PixelLocal, ast::transform::Transform> { … };

}  // namespace tint::hlsl::writer

#endif  // SRC_TINT_LANG_HLSL_WRITER_AST_RAISE_PIXEL_LOCAL_H_