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//
// Copyright (c) 2013 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.
//
// formatutils.h: Queries for GL image formats.
#ifndef LIBANGLE_FORMATUTILS_H_
#define LIBANGLE_FORMATUTILS_H_
#include <cstddef>
#include <stdint.h>
#include "angle_gl.h"
#include "libANGLE/Caps.h"
#include "libANGLE/Error.h"
#include "libANGLE/angletypes.h"
namespace gl
{
struct FormatType final
{
FormatType();
FormatType(GLenum format_, GLenum type_);
FormatType(const FormatType &other) = default;
FormatType &operator=(const FormatType &other) = default;
bool operator<(const FormatType &other) const;
GLenum format;
GLenum type;
};
struct Type
{
Type();
GLuint bytes;
GLuint bytesShift; // Bit shift by this value to effectively divide/multiply by "bytes" in a more optimal way
bool specialInterpretation;
};
const Type &GetTypeInfo(GLenum type);
struct InternalFormat
{
InternalFormat();
gl::ErrorOrResult<GLuint> computeRowPitch(GLenum formatType,
GLsizei width,
GLint alignment,
GLint rowLength) const;
gl::ErrorOrResult<GLuint> computeDepthPitch(GLenum formatType,
GLsizei width,
GLsizei height,
GLint alignment,
GLint rowLength,
GLint imageHeight) const;
gl::ErrorOrResult<GLuint> computeCompressedImageSize(GLenum formatType,
const gl::Extents &size) const;
gl::ErrorOrResult<GLuint> computeSkipBytes(GLuint rowPitch,
GLuint depthPitch,
GLint skipImages,
GLint skipRows,
GLint skipPixels,
bool applySkipImages) const;
gl::ErrorOrResult<GLuint> computeUnpackSize(GLenum formatType,
const gl::Extents &size,
const gl::PixelUnpackState &unpack) const;
bool isLUMA() const;
bool operator==(const InternalFormat &other) const;
bool operator!=(const InternalFormat &other) const;
GLenum internalFormat;
GLuint redBits;
GLuint greenBits;
GLuint blueBits;
GLuint luminanceBits;
GLuint alphaBits;
GLuint sharedBits;
GLuint depthBits;
GLuint stencilBits;
GLuint pixelBytes;
GLuint componentCount;
bool compressed;
GLuint compressedBlockWidth;
GLuint compressedBlockHeight;
GLenum format;
GLenum type;
GLenum componentType;
GLenum colorEncoding;
typedef bool (*SupportCheckFunction)(GLuint, const Extensions &);
SupportCheckFunction textureSupport;
SupportCheckFunction renderSupport;
SupportCheckFunction filterSupport;
};
// A "Format" is either a sized format, or an {unsized format, type} combination.
struct Format
{
// Sized types only.
explicit Format(GLenum internalFormat);
explicit Format(const InternalFormat &internalFormat);
// Sized or unsized types.
Format(GLenum internalFormat, GLenum format, GLenum type);
Format(const Format &other);
Format &operator=(const Format &other);
GLenum asSized() const;
bool valid() const;
static Format Invalid();
static bool SameSized(const Format &a, const Format &b);
// This is the sized info.
const InternalFormat *info;
GLenum format;
GLenum type;
bool sized;
};
const InternalFormat &GetInternalFormatInfo(GLenum internalFormat);
GLenum GetSizedInternalFormat(GLenum internalFormat, GLenum type);
typedef std::set<GLenum> FormatSet;
const FormatSet &GetAllSizedInternalFormats();
// From the ESSL 3.00.4 spec:
// Vertex shader inputs can only be float, floating-point vectors, matrices, signed and unsigned
// integers and integer vectors. Vertex shader inputs cannot be arrays or structures.
enum AttributeType
{
ATTRIBUTE_FLOAT,
ATTRIBUTE_VEC2,
ATTRIBUTE_VEC3,
ATTRIBUTE_VEC4,
ATTRIBUTE_INT,
ATTRIBUTE_IVEC2,
ATTRIBUTE_IVEC3,
ATTRIBUTE_IVEC4,
ATTRIBUTE_UINT,
ATTRIBUTE_UVEC2,
ATTRIBUTE_UVEC3,
ATTRIBUTE_UVEC4,
ATTRIBUTE_MAT2,
ATTRIBUTE_MAT3,
ATTRIBUTE_MAT4,
ATTRIBUTE_MAT2x3,
ATTRIBUTE_MAT2x4,
ATTRIBUTE_MAT3x2,
ATTRIBUTE_MAT3x4,
ATTRIBUTE_MAT4x2,
ATTRIBUTE_MAT4x3,
};
AttributeType GetAttributeType(GLenum enumValue);
enum VertexFormatType
{
VERTEX_FORMAT_INVALID,
VERTEX_FORMAT_SBYTE1,
VERTEX_FORMAT_SBYTE1_NORM,
VERTEX_FORMAT_SBYTE2,
VERTEX_FORMAT_SBYTE2_NORM,
VERTEX_FORMAT_SBYTE3,
VERTEX_FORMAT_SBYTE3_NORM,
VERTEX_FORMAT_SBYTE4,
VERTEX_FORMAT_SBYTE4_NORM,
VERTEX_FORMAT_UBYTE1,
VERTEX_FORMAT_UBYTE1_NORM,
VERTEX_FORMAT_UBYTE2,
VERTEX_FORMAT_UBYTE2_NORM,
VERTEX_FORMAT_UBYTE3,
VERTEX_FORMAT_UBYTE3_NORM,
VERTEX_FORMAT_UBYTE4,
VERTEX_FORMAT_UBYTE4_NORM,
VERTEX_FORMAT_SSHORT1,
VERTEX_FORMAT_SSHORT1_NORM,
VERTEX_FORMAT_SSHORT2,
VERTEX_FORMAT_SSHORT2_NORM,
VERTEX_FORMAT_SSHORT3,
VERTEX_FORMAT_SSHORT3_NORM,
VERTEX_FORMAT_SSHORT4,
VERTEX_FORMAT_SSHORT4_NORM,
VERTEX_FORMAT_USHORT1,
VERTEX_FORMAT_USHORT1_NORM,
VERTEX_FORMAT_USHORT2,
VERTEX_FORMAT_USHORT2_NORM,
VERTEX_FORMAT_USHORT3,
VERTEX_FORMAT_USHORT3_NORM,
VERTEX_FORMAT_USHORT4,
VERTEX_FORMAT_USHORT4_NORM,
VERTEX_FORMAT_SINT1,
VERTEX_FORMAT_SINT1_NORM,
VERTEX_FORMAT_SINT2,
VERTEX_FORMAT_SINT2_NORM,
VERTEX_FORMAT_SINT3,
VERTEX_FORMAT_SINT3_NORM,
VERTEX_FORMAT_SINT4,
VERTEX_FORMAT_SINT4_NORM,
VERTEX_FORMAT_UINT1,
VERTEX_FORMAT_UINT1_NORM,
VERTEX_FORMAT_UINT2,
VERTEX_FORMAT_UINT2_NORM,
VERTEX_FORMAT_UINT3,
VERTEX_FORMAT_UINT3_NORM,
VERTEX_FORMAT_UINT4,
VERTEX_FORMAT_UINT4_NORM,
VERTEX_FORMAT_SBYTE1_INT,
VERTEX_FORMAT_SBYTE2_INT,
VERTEX_FORMAT_SBYTE3_INT,
VERTEX_FORMAT_SBYTE4_INT,
VERTEX_FORMAT_UBYTE1_INT,
VERTEX_FORMAT_UBYTE2_INT,
VERTEX_FORMAT_UBYTE3_INT,
VERTEX_FORMAT_UBYTE4_INT,
VERTEX_FORMAT_SSHORT1_INT,
VERTEX_FORMAT_SSHORT2_INT,
VERTEX_FORMAT_SSHORT3_INT,
VERTEX_FORMAT_SSHORT4_INT,
VERTEX_FORMAT_USHORT1_INT,
VERTEX_FORMAT_USHORT2_INT,
VERTEX_FORMAT_USHORT3_INT,
VERTEX_FORMAT_USHORT4_INT,
VERTEX_FORMAT_SINT1_INT,
VERTEX_FORMAT_SINT2_INT,
VERTEX_FORMAT_SINT3_INT,
VERTEX_FORMAT_SINT4_INT,
VERTEX_FORMAT_UINT1_INT,
VERTEX_FORMAT_UINT2_INT,
VERTEX_FORMAT_UINT3_INT,
VERTEX_FORMAT_UINT4_INT,
VERTEX_FORMAT_FIXED1,
VERTEX_FORMAT_FIXED2,
VERTEX_FORMAT_FIXED3,
VERTEX_FORMAT_FIXED4,
VERTEX_FORMAT_HALF1,
VERTEX_FORMAT_HALF2,
VERTEX_FORMAT_HALF3,
VERTEX_FORMAT_HALF4,
VERTEX_FORMAT_FLOAT1,
VERTEX_FORMAT_FLOAT2,
VERTEX_FORMAT_FLOAT3,
VERTEX_FORMAT_FLOAT4,
VERTEX_FORMAT_SINT210,
VERTEX_FORMAT_UINT210,
VERTEX_FORMAT_SINT210_NORM,
VERTEX_FORMAT_UINT210_NORM,
VERTEX_FORMAT_SINT210_INT,
VERTEX_FORMAT_UINT210_INT,
};
typedef std::vector<gl::VertexFormatType> InputLayout;
struct VertexFormat : angle::NonCopyable
{
VertexFormat(GLenum typeIn, GLboolean normalizedIn, GLuint componentsIn, bool pureIntegerIn);
GLenum type;
GLboolean normalized;
GLuint components;
bool pureInteger;
};
VertexFormatType GetVertexFormatType(GLenum type, GLboolean normalized, GLuint components, bool pureInteger);
VertexFormatType GetVertexFormatType(const VertexAttribute &attrib);
VertexFormatType GetVertexFormatType(const VertexAttribute &attrib, GLenum currentValueType);
const VertexFormat &GetVertexFormatFromType(VertexFormatType vertexFormatType);
} // namespace gl
#endif // LIBANGLE_FORMATUTILS_H_
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