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/*
* Copyright 2010 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrTypes_DEFINED
#define GrTypes_DEFINED
#include "SkMath.h"
#include "SkTypes.h"
#include "GrConfig.h"
////////////////////////////////////////////////////////////////////////////////
/**
* Defines overloaded bitwise operators to make it easier to use an enum as a
* bitfield.
*/
#define GR_MAKE_BITFIELD_OPS(X) \
inline X operator |(X a, X b) { \
return (X) (+a | +b); \
} \
inline X& operator |=(X& a, X b) { \
return (a = a | b); \
} \
inline X operator &(X a, X b) { \
return (X) (+a & +b); \
} \
inline X& operator &=(X& a, X b) { \
return (a = a & b); \
} \
template <typename T> \
inline X operator &(T a, X b) { \
return (X) (+a & +b); \
} \
template <typename T> \
inline X operator &(X a, T b) { \
return (X) (+a & +b); \
} \
#define GR_DECL_BITFIELD_OPS_FRIENDS(X) \
friend X operator |(X a, X b); \
friend X& operator |=(X& a, X b); \
\
friend X operator &(X a, X b); \
friend X& operator &=(X& a, X b); \
\
template <typename T> \
friend X operator &(T a, X b); \
\
template <typename T> \
friend X operator &(X a, T b); \
/**
* Wraps a C++11 enum that we use as a bitfield, and enables a limited amount of
* masking with type safety. Instantiated with the ~ operator.
*/
template<typename TFlags> class GrTFlagsMask {
public:
constexpr explicit GrTFlagsMask(TFlags value) : GrTFlagsMask(static_cast<int>(value)) {}
constexpr explicit GrTFlagsMask(int value) : fValue(value) {}
constexpr int value() const { return fValue; }
private:
const int fValue;
};
// Or-ing a mask always returns another mask.
template<typename TFlags> constexpr GrTFlagsMask<TFlags> operator|(GrTFlagsMask<TFlags> a,
GrTFlagsMask<TFlags> b) {
return GrTFlagsMask<TFlags>(a.value() | b.value());
}
template<typename TFlags> constexpr GrTFlagsMask<TFlags> operator|(GrTFlagsMask<TFlags> a,
TFlags b) {
return GrTFlagsMask<TFlags>(a.value() | static_cast<int>(b));
}
template<typename TFlags> constexpr GrTFlagsMask<TFlags> operator|(TFlags a,
GrTFlagsMask<TFlags> b) {
return GrTFlagsMask<TFlags>(static_cast<int>(a) | b.value());
}
template<typename TFlags> inline GrTFlagsMask<TFlags>& operator|=(GrTFlagsMask<TFlags>& a,
GrTFlagsMask<TFlags> b) {
return (a = a | b);
}
// And-ing two masks returns another mask; and-ing one with regular flags returns flags.
template<typename TFlags> constexpr GrTFlagsMask<TFlags> operator&(GrTFlagsMask<TFlags> a,
GrTFlagsMask<TFlags> b) {
return GrTFlagsMask<TFlags>(a.value() & b.value());
}
template<typename TFlags> constexpr TFlags operator&(GrTFlagsMask<TFlags> a, TFlags b) {
return static_cast<TFlags>(a.value() & static_cast<int>(b));
}
template<typename TFlags> constexpr TFlags operator&(TFlags a, GrTFlagsMask<TFlags> b) {
return static_cast<TFlags>(static_cast<int>(a) & b.value());
}
template<typename TFlags> inline TFlags& operator&=(TFlags& a, GrTFlagsMask<TFlags> b) {
return (a = a & b);
}
/**
* Defines bitwise operators that make it possible to use an enum class as a
* basic bitfield.
*/
#define GR_MAKE_BITFIELD_CLASS_OPS(X) \
constexpr GrTFlagsMask<X> operator~(X a) { \
return GrTFlagsMask<X>(~static_cast<int>(a)); \
} \
constexpr X operator|(X a, X b) { \
return static_cast<X>(static_cast<int>(a) | static_cast<int>(b)); \
} \
inline X& operator|=(X& a, X b) { \
return (a = a | b); \
} \
constexpr bool operator&(X a, X b) { \
return SkToBool(static_cast<int>(a) & static_cast<int>(b)); \
} \
#define GR_DECL_BITFIELD_CLASS_OPS_FRIENDS(X) \
friend constexpr GrTFlagsMask<X> operator ~(X); \
friend constexpr X operator |(X, X); \
friend X& operator |=(X&, X); \
friend constexpr bool operator &(X, X);
////////////////////////////////////////////////////////////////////////////////
// compile time versions of min/max
#define GR_CT_MAX(a, b) (((b) < (a)) ? (a) : (b))
#define GR_CT_MIN(a, b) (((b) < (a)) ? (b) : (a))
/**
* divide, rounding up
*/
static inline int32_t GrIDivRoundUp(int x, int y) {
SkASSERT(y > 0);
return (x + (y-1)) / y;
}
static inline uint32_t GrUIDivRoundUp(uint32_t x, uint32_t y) {
return (x + (y-1)) / y;
}
static inline size_t GrSizeDivRoundUp(size_t x, size_t y) {
return (x + (y-1)) / y;
}
// compile time, evaluates Y multiple times
#define GR_CT_DIV_ROUND_UP(X, Y) (((X) + ((Y)-1)) / (Y))
/**
* align up
*/
static inline uint32_t GrUIAlignUp(uint32_t x, uint32_t alignment) {
return GrUIDivRoundUp(x, alignment) * alignment;
}
static inline size_t GrSizeAlignUp(size_t x, size_t alignment) {
return GrSizeDivRoundUp(x, alignment) * alignment;
}
// compile time, evaluates A multiple times
#define GR_CT_ALIGN_UP(X, A) (GR_CT_DIV_ROUND_UP((X),(A)) * (A))
/**
* amount of pad needed to align up
*/
static inline uint32_t GrUIAlignUpPad(uint32_t x, uint32_t alignment) {
return (alignment - x % alignment) % alignment;
}
static inline size_t GrSizeAlignUpPad(size_t x, size_t alignment) {
return (alignment - x % alignment) % alignment;
}
/**
* align down
*/
static inline uint32_t GrUIAlignDown(uint32_t x, uint32_t alignment) {
return (x / alignment) * alignment;
}
static inline size_t GrSizeAlignDown(size_t x, uint32_t alignment) {
return (x / alignment) * alignment;
}
///////////////////////////////////////////////////////////////////////////////
/**
* Possible 3D APIs that may be used by Ganesh.
*/
enum GrBackend {
kMetal_GrBackend,
kOpenGL_GrBackend,
kVulkan_GrBackend,
/**
* Mock is a backend that does not draw anything. It is used for unit tests
* and to measure CPU overhead.
*/
kMock_GrBackend,
};
///////////////////////////////////////////////////////////////////////////////
/**
* Used to say whether a texture has mip levels allocated or not.
*/
enum class GrMipMapped : bool {
kNo = false,
kYes = true
};
///////////////////////////////////////////////////////////////////////////////
/**
* GPU SkImage and SkSurfaces can be stored such that (0, 0) in texture space may correspond to
* either the top-left or bottom-left content pixel.
*/
enum GrSurfaceOrigin {
kTopLeft_GrSurfaceOrigin,
kBottomLeft_GrSurfaceOrigin,
};
/**
* A GrContext's cache of backend context state can be partially invalidated.
* These enums are specific to the GL backend and we'd add a new set for an alternative backend.
*/
enum GrGLBackendState {
kRenderTarget_GrGLBackendState = 1 << 0,
kTextureBinding_GrGLBackendState = 1 << 1,
// View state stands for scissor and viewport
kView_GrGLBackendState = 1 << 2,
kBlend_GrGLBackendState = 1 << 3,
kMSAAEnable_GrGLBackendState = 1 << 4,
kVertex_GrGLBackendState = 1 << 5,
kStencil_GrGLBackendState = 1 << 6,
kPixelStore_GrGLBackendState = 1 << 7,
kProgram_GrGLBackendState = 1 << 8,
kFixedFunction_GrGLBackendState = 1 << 9,
kMisc_GrGLBackendState = 1 << 10,
kPathRendering_GrGLBackendState = 1 << 11,
kALL_GrGLBackendState = 0xffff
};
/**
* This value translates to reseting all the context state for any backend.
*/
static const uint32_t kAll_GrBackendState = 0xffffffff;
/**
* Enum used as return value when flush with semaphores so the client knows whether the semaphores
* were submitted to GPU or not.
*/
enum class GrSemaphoresSubmitted : bool {
kNo = false,
kYes = true
};
#endif
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