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//
// Copyright 2002 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.
//
// utilities.h: Conversion functions and other utility routines.
#ifndef COMMON_UTILITIES_H_
#define COMMON_UTILITIES_H_
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLSLANG/ShaderLang.h>
#include <math.h>
#include <string>
#include <vector>
#include "angle_gl.h"
#include "common/PackedEnums.h"
#include "common/mathutil.h"
#include "common/platform.h"
namespace sh
{
struct ShaderVariable;
}
constexpr bool ShPixelLocalStorageTypeUsesImages(ShPixelLocalStorageType type)
{
return type == ShPixelLocalStorageType::ImageStoreR32PackedFormats ||
type == ShPixelLocalStorageType::ImageStoreNativeFormats;
}
namespace gl
{
int VariableComponentCount(GLenum type);
GLenum VariableComponentType(GLenum type);
size_t VariableComponentSize(GLenum type);
size_t VariableInternalSize(GLenum type);
size_t VariableExternalSize(GLenum type);
int VariableRowCount(GLenum type);
int VariableColumnCount(GLenum type);
bool IsSamplerType(GLenum type);
bool IsSamplerCubeType(GLenum type);
bool IsSamplerYUVType(GLenum type);
bool IsImageType(GLenum type);
bool IsImage2DType(GLenum type);
bool IsAtomicCounterType(GLenum type);
bool IsOpaqueType(GLenum type);
bool IsMatrixType(GLenum type);
GLenum TransposeMatrixType(GLenum type);
int VariableRegisterCount(GLenum type);
int MatrixRegisterCount(GLenum type, bool isRowMajorMatrix);
int MatrixComponentCount(GLenum type, bool isRowMajorMatrix);
int VariableSortOrder(GLenum type);
GLenum VariableBoolVectorType(GLenum type);
std::string GetGLSLTypeString(GLenum type);
int AllocateFirstFreeBits(unsigned int *bits, unsigned int allocationSize, unsigned int bitsSize);
// Parse the base resource name and array indices. Returns the base name of the resource.
// If the provided name doesn't index an array, the outSubscripts vector will be empty.
// If the provided name indexes an array, the outSubscripts vector will contain indices with
// outermost array indices in the back. If an array index is invalid, GL_INVALID_INDEX is added to
// outSubscripts.
std::string ParseResourceName(const std::string &name, std::vector<unsigned int> *outSubscripts);
bool IsBuiltInName(const char *name);
ANGLE_INLINE bool IsBuiltInName(const std::string &name)
{
return IsBuiltInName(name.c_str());
}
// Strips only the last array index from a resource name.
std::string StripLastArrayIndex(const std::string &name);
bool SamplerNameContainsNonZeroArrayElement(const std::string &name);
// Find the range of index values in the provided indices pointer. Primitive restart indices are
// only counted in the range if primitive restart is disabled.
IndexRange ComputeIndexRange(DrawElementsType indexType,
const GLvoid *indices,
size_t count,
bool primitiveRestartEnabled);
// Get the primitive restart index value for the given index type.
GLuint GetPrimitiveRestartIndex(DrawElementsType indexType);
// Get the primitive restart index value with the given C++ type.
template <typename T>
constexpr T GetPrimitiveRestartIndexFromType()
{
return std::numeric_limits<T>::max();
}
static_assert(GetPrimitiveRestartIndexFromType<uint8_t>() == 0xFF,
"verify restart index for uint8_t values");
static_assert(GetPrimitiveRestartIndexFromType<uint16_t>() == 0xFFFF,
"verify restart index for uint8_t values");
static_assert(GetPrimitiveRestartIndexFromType<uint32_t>() == 0xFFFFFFFF,
"verify restart index for uint8_t values");
bool IsTriangleMode(PrimitiveMode drawMode);
bool IsPolygonMode(PrimitiveMode mode);
namespace priv
{
extern const angle::PackedEnumMap<PrimitiveMode, bool> gLineModes;
} // namespace priv
ANGLE_INLINE bool IsLineMode(PrimitiveMode primitiveMode)
{
return priv::gLineModes[primitiveMode];
}
bool IsIntegerFormat(GLenum unsizedFormat);
// Returns the product of the sizes in the vector, or 1 if the vector is empty. Doesn't currently
// perform overflow checks.
unsigned int ArraySizeProduct(const std::vector<unsigned int> &arraySizes);
// Returns the product of the sizes in the vector except for the outermost dimension, or 1 if the
// vector is empty.
unsigned int InnerArraySizeProduct(const std::vector<unsigned int> &arraySizes);
// Returns the outermost array dimension, or 1 if the vector is empty.
unsigned int OutermostArraySize(const std::vector<unsigned int> &arraySizes);
// Return the array index at the end of name, and write the length of name before the final array
// index into nameLengthWithoutArrayIndexOut. In case name doesn't include an array index, return
// GL_INVALID_INDEX and write the length of the original string.
unsigned int ParseArrayIndex(const std::string &name, size_t *nameLengthWithoutArrayIndexOut);
enum class SamplerFormat : uint8_t
{
Float = 0,
Unsigned = 1,
Signed = 2,
Shadow = 3,
InvalidEnum = 4,
EnumCount = 4,
};
struct UniformTypeInfo final : angle::NonCopyable
{
inline constexpr UniformTypeInfo(GLenum type,
GLenum componentType,
GLenum textureType,
GLenum transposedMatrixType,
GLenum boolVectorType,
SamplerFormat samplerFormat,
int rowCount,
int columnCount,
int componentCount,
size_t componentSize,
size_t internalSize,
size_t externalSize,
bool isSampler,
bool isMatrixType,
bool isImageType);
GLenum type;
GLenum componentType;
GLenum textureType;
GLenum transposedMatrixType;
GLenum boolVectorType;
SamplerFormat samplerFormat;
int rowCount;
int columnCount;
int componentCount;
size_t componentSize;
size_t internalSize;
size_t externalSize;
bool isSampler;
bool isMatrixType;
bool isImageType;
};
inline constexpr UniformTypeInfo::UniformTypeInfo(GLenum type,
GLenum componentType,
GLenum textureType,
GLenum transposedMatrixType,
GLenum boolVectorType,
SamplerFormat samplerFormat,
int rowCount,
int columnCount,
int componentCount,
size_t componentSize,
size_t internalSize,
size_t externalSize,
bool isSampler,
bool isMatrixType,
bool isImageType)
: type(type),
componentType(componentType),
textureType(textureType),
transposedMatrixType(transposedMatrixType),
boolVectorType(boolVectorType),
samplerFormat(samplerFormat),
rowCount(rowCount),
columnCount(columnCount),
componentCount(componentCount),
componentSize(componentSize),
internalSize(internalSize),
externalSize(externalSize),
isSampler(isSampler),
isMatrixType(isMatrixType),
isImageType(isImageType)
{}
const UniformTypeInfo &GetUniformTypeInfo(GLenum uniformType);
const char *GetGenericErrorMessage(GLenum error);
unsigned int ElementTypeSize(GLenum elementType);
bool IsMipmapFiltered(GLenum minFilterMode);
template <typename T>
T GetClampedVertexCount(size_t vertexCount)
{
static constexpr size_t kMax = static_cast<size_t>(std::numeric_limits<T>::max());
return static_cast<T>(vertexCount > kMax ? kMax : vertexCount);
}
enum class PipelineType
{
GraphicsPipeline = 0,
ComputePipeline = 1,
};
PipelineType GetPipelineType(ShaderType shaderType);
// For use with KHR_debug.
const char *GetDebugMessageSourceString(GLenum source);
const char *GetDebugMessageTypeString(GLenum type);
const char *GetDebugMessageSeverityString(GLenum severity);
// For use with EXT_texture_format_sRGB_override and EXT_texture_sRGB_decode
// A texture may be forced to decode to a nonlinear colorspace, to a linear colorspace, or to the
// default colorspace of its current format.
//
// Default corresponds to "the texture should use the imageview that corresponds to its format"
// Linear corresponds to "the texture has sRGB decoding disabled by extension, and should use a
// linear imageview even if it is in a nonlinear format" NonLinear corresponds to "the texture has
// sRGB override enabled by extension, and should use a nonlinear imageview even if it is in a
// linear format"
enum class SrgbOverride
{
Default = 0,
SRGB,
Linear
};
// For use with EXT_sRGB_write_control
// A render target may be forced to convert to a linear colorspace, or may be allowed to do whatever
// colorspace conversion is appropriate for its format. There is no option to force linear->sRGB, it
// can only convert from sRGB->linear
enum class SrgbWriteControlMode
{
Default = 0,
Linear = 1
};
// For use with EXT_YUV_target
// A sampler of external YUV textures may either implicitly perform RGB conversion (regular
// samplerExternalOES) or skip the conversion and sample raw YUV values (__samplerExternal2DY2Y).
enum class YuvSamplingMode
{
Default = 0,
Y2Y = 1
};
ShaderType GetShaderTypeFromBitfield(size_t singleShaderType);
GLbitfield GetBitfieldFromShaderType(ShaderType shaderType);
bool ShaderTypeSupportsTransformFeedback(ShaderType shaderType);
// Given a set of shader stages, returns the last vertex processing stage. This is the stage that
// interfaces the fragment shader.
ShaderType GetLastPreFragmentStage(ShaderBitSet shaderTypes);
} // namespace gl
namespace egl
{
static const EGLenum FirstCubeMapTextureTarget = EGL_GL_TEXTURE_CUBE_MAP_POSITIVE_X_KHR;
static const EGLenum LastCubeMapTextureTarget = EGL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_KHR;
bool IsCubeMapTextureTarget(EGLenum target);
size_t CubeMapTextureTargetToLayerIndex(EGLenum target);
EGLenum LayerIndexToCubeMapTextureTarget(size_t index);
bool IsTextureTarget(EGLenum target);
bool IsRenderbufferTarget(EGLenum target);
bool IsExternalImageTarget(EGLenum target);
const char *GetGenericErrorMessage(EGLint error);
} // namespace egl
namespace egl_gl
{
GLuint EGLClientBufferToGLObjectHandle(EGLClientBuffer buffer);
}
namespace gl_egl
{
EGLenum GLComponentTypeToEGLColorComponentType(GLenum glComponentType);
EGLClientBuffer GLObjectHandleToEGLClientBuffer(GLuint handle);
} // namespace gl_egl
namespace angle
{
bool IsDrawEntryPoint(EntryPoint entryPoint);
bool IsDispatchEntryPoint(EntryPoint entryPoint);
bool IsClearEntryPoint(EntryPoint entryPoint);
bool IsQueryEntryPoint(EntryPoint entryPoint);
} // namespace angle
#if !defined(ANGLE_ENABLE_WINDOWS_UWP)
void writeFile(const char *path, const void *data, size_t size);
#endif
#if defined(ANGLE_PLATFORM_WINDOWS)
void ScheduleYield();
#endif
// Get the underlying type. Useful for indexing into arrays with enum values by avoiding the clutter
// of the extraneous static_cast<>() calls.
template <typename E>
constexpr typename std::underlying_type<E>::type ToUnderlying(E e) noexcept
{
return static_cast<typename std::underlying_type<E>::type>(e);
}
#endif // COMMON_UTILITIES_H_