chromium/third_party/angle/src/libANGLE/PixelLocalStorage.h

//
// Copyright 2022 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

// PixelLocalStorage.h: Defines the renderer-agnostic container classes
// gl::PixelLocalStorage and gl::PixelLocalStoragePlane for
// ANGLE_shader_pixel_local_storage.

#ifndef LIBANGLE_PIXEL_LOCAL_STORAGE_H_
#define LIBANGLE_PIXEL_LOCAL_STORAGE_H_

#include "GLSLANG/ShaderLang.h"
#include "angle_gl.h"
#include "libANGLE/ImageIndex.h"
#include "libANGLE/angletypes.h"

namespace gl
{

struct Caps;
class Context;
class Texture;

// Holds the configuration of an ANGLE_shader_pixel_local_storage plane.
//
// Unlike normal framebuffer attachments, pixel local storage planes don't take effect until the
// application calls glBeginPixelLocalStorageANGLE, and the manner in which they take effect is
// highly dependent on the backend implementation. A PixelLocalStoragePlane is just a plain data
// description what to set up later once PLS is enabled.
class PixelLocalStoragePlane : angle::NonCopyable, public angle::ObserverInterface
{ … };

// Manages a collection of PixelLocalStoragePlanes and applies them to ANGLE's GL state.
//
// The main magic of ANGLE_shader_pixel_local_storage happens inside shaders, so we just emulate the
// client API on top of ANGLE's OpenGL ES API for simplicity.
class PixelLocalStorage
{ … };

}  // namespace gl

#endif  // LIBANGLE_PIXEL_LOCAL_STORAGE_H_