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

//
// Copyright 2015 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.
//
// VaryingPacking:
//   Class which describes a mapping from varyings to registers, according
//   to the spec, or using custom packing algorithms. We also keep a register
//   allocation list for the D3D renderer.
//

#ifndef LIBANGLE_VARYINGPACKING_H_
#define LIBANGLE_VARYINGPACKING_H_

#include <GLSLANG/ShaderVars.h>

#include "angle_gl.h"
#include "common/angleutils.h"
#include "libANGLE/angletypes.h"

#include <map>

namespace gl
{
class InfoLog;
class ProgramExecutable;
struct Caps;
struct LinkingVariables;
struct ProgramVaryingRef;

ProgramMergedVaryings;

// A varying can have different names between stages if matched by the location layout qualifier.
// Additionally, same name varyings could still be of two identical struct types with different
// names.  This struct contains information on the varying in one of the two stages.  PackedVarying
// will thus contain two copies of this along with common information, such as interpolation or
// field index.
struct VaryingInShaderRef : angle::NonCopyable
{ … };

struct PackedVarying : angle::NonCopyable
{ … };

struct PackedVaryingRegister final
{ … };

// Supported packing modes:
enum class PackMode
{ … };

enum class PerVertexMember
{ … };
PerVertexMemberBitSet;

class VaryingPacking final : angle::NonCopyable
{ … };

class ProgramVaryingPacking final : angle::NonCopyable
{ … };

ProgramMergedVaryings GetMergedVaryingsFromLinkingVariables(
    const LinkingVariables &linkingVariables);
}  // namespace gl

#endif  // LIBANGLE_VARYINGPACKING_H_