SkImageInfo Reference === # Image Info ## Overview ## Subtopics | name | description | | --- | --- | | Constructors | functions that construct SkImageInfo | | Member Functions | static functions and member methods | | Operators | operator overloading methods | ## Constants | name | description | | --- | --- | ## Alpha Type ## Enum SkAlphaType

enum SkAlphaType {
kUnknown SkAlphaType,
kOpaque SkAlphaType,
kPremul SkAlphaType,
kUnpremul SkAlphaType,
kLastEnum_SkAlphaType = kUnpremul SkAlphaType,
};

Describes how to interpret the alpha component of a pixel. ### Constants

`kUnknown_SkAlphaType`	0
`kOpaque_SkAlphaType`	1	All pixels are stored as opaque.
`kPremul_SkAlphaType`	2	All pixels have their alpha premultiplied in their color components. This is the natural format for the rendering target pixels.
`kUnpremul_SkAlphaType`	3	All pixels have their color components stored without any regard to the alpha. e.g. this is the default configuration for PNG images. kUnpremul SkAlphaType is supported only for input images. Rendering cannot generate this on output.

### Example

### See Also incomplete ## Color Type ## Enum SkColorType

enum SkColorType {
kUnknown SkColorType,
kAlpha 8 SkColorType,
kRGB 565 SkColorType,
kARGB 4444 SkColorType,
kRGBA 8888 SkColorType,
kBGRA 8888 SkColorType,
kGray 8 SkColorType,
kRGBA F16 SkColorType,
kLastEnum_SkColorType = kRGBA F16 SkColorType,
kN32 SkColorType = kBGRA 8888 SkColorType,
kN32 SkColorType = kRGBA 8888 SkColorType,
};

Describes how to interpret the components of a pixel. kN32 SkColorType is an alias for whichever 32 bit Color ARGB format is the "" form for skia's blitters. Use this if you don't have a swizzle preference for 32 bit pixels. ### Constants

`kUnknown_SkColorType`	0
`kAlpha_8_SkColorType`	1
`kRGB_565_SkColorType`	2
`kARGB_4444_SkColorType`	3
`kRGBA_8888_SkColorType`	4
`kRGB_888x_SkColorType`	5
`kBGRA_8888_SkColorType`	6
`kRGBA_1010102_SkColorType`	7
`kRGB_101010x_SkColorType`	8
`kGray_8_SkColorType`	9
`kRGBA_F16_SkColorType`	10

### Constants

kN32_SkColorType 4

### Example

### See Also incomplete ## Enum SkYUVColorSpace

enum SkYUVColorSpace {
kJPEG SkYUVColorSpace,
kRec601 SkYUVColorSpace,
kRec709 SkYUVColorSpace,
kLastEnum_SkYUVColorSpace = kRec709 SkYUVColorSpace,
};

Describes the color space a YUV pixel. ### Constants

`kJPEG_SkYUVColorSpace`	0	Standard JPEG color space.
`kRec601_SkYUVColorSpace`	1	SDTV standard Rec. 601 color space. Uses "studio swing" [16, 235] color range. See http://en.wikipedia.org/wiki/Rec._601 for details.
`kRec709_SkYUVColorSpace`	2	HDTV standard Rec. 709 color space. Uses "studio swing" [16, 235] color range. See http://en.wikipedia.org/wiki/Rec._709 for details.

### Example

### See Also incomplete ## Enum SkDestinationSurfaceColorMode

enum class SkDestinationSurfaceColorMode {
kLegacy,
kGammaAndColorSpaceAware,
};

### Constants

`SkDestinationSurfaceColorMode::kLegacy`	0
`SkDestinationSurfaceColorMode::kGammaAndColorSpaceAware`	1

### Example

### See Also incomplete # Struct SkImageInfo Describe an image's dimensions and pixel type. Used for both src images and render-targets (surfaces). ## Operators | name | description | | --- | --- | | operator!=(const SkImageInfo& other) const | incomplete | | operator==(const SkImageInfo& other) const | incomplete | ## Member Functions | name | description | | --- | --- | | ByteSizeOverflowed | incomplete | | Make | creates Image Info from dimensions, Color Type, Alpha Type, Color Space | | MakeA8 | creates Image Info with kAlpha 8 SkColorType, kPremul SkAlphaType | | MakeN32 | creates Image Info with Native Color Type | | MakeN32Premul | creates Image Info with Native Color Type, kPremul SkAlphaType | | MakeS32 | creates Image Info with Native Color Type, sRGB Color Space | | MakeUnknown | creates Image Info with kUnknown SkColorType, kUnknown SkAlphaType | | alphaType | incomplete | | bounds | incomplete | | bytesPerPixel | incomplete | | colorSpace | incomplete | | colorType | incomplete | | computeByteSize | incomplete | | computeMinByteSize | incomplete | | computeOffset | incomplete | | dimensions | incomplete | | flatten | incomplete | | gammaCloseToSRGB | incomplete | | height | incomplete | | isEmpty | incomplete | | isOpaque | incomplete | | makeAlphaType | creates Image Info with changed Alpha Type | | makeColorSpace | creates Image Info with changed Color Space | | makeColorType | creates Image Info with changed Color Type | | makeWH | creates Image Info with changed dimensions | | minRowBytes | incomplete | | minRowBytes64 | incomplete | | refColorSpace | incomplete | | reset | incomplete | | shiftPerPixel | incomplete | | unflatten | incomplete | | validRowBytes | incomplete | | validate | incomplete | | width | incomplete | ## Constructors | name | description | | --- | --- | | Make | creates Image Info from dimensions, Color Type, Alpha Type, Color Space | | MakeA8 | creates Image Info with kAlpha 8 SkColorType, kPremul SkAlphaType | | MakeN32 | creates Image Info with Native Color Type | | MakeN32Premul | creates Image Info with Native Color Type, kPremul SkAlphaType | | MakeS32 | creates Image Info with Native Color Type, sRGB Color Space | | MakeUnknown | creates Image Info with kUnknown SkColorType, kUnknown SkAlphaType | | SkImageInfo() | creates with zero dimensions, kUnknown SkColorType, kUnknown SkAlphaType | | makeAlphaType | creates Image Info with changed Alpha Type | | makeColorSpace | creates Image Info with changed Color Space | | makeColorType | creates Image Info with changed Color Type | | makeWH | creates Image Info with changed dimensions | ## SkImageInfo

SkImageInfo()

### Return Value incomplete ### Example

### See Also incomplete --- ## Make

static SkImageInfo Make(int width, int height, SkColorType ct, SkAlphaType at,
                        sk_sp<SkColorSpace> cs = nullptr)

### Parameters

`width`	incomplete
`height`	incomplete
`ct`	incomplete
`at`	incomplete
`cs`	incomplete

### Return Value incomplete ### Example

### See Also incomplete --- ## MakeN32

static SkImageInfo MakeN32(int width, int height, SkAlphaType at, sk_sp<SkColorSpace> cs = nullptr)

Sets colortype to kN32 SkColorType. ### Parameters

`width`	incomplete
`height`	incomplete
`at`	incomplete
`cs`	incomplete

### Return Value incomplete ### Example

### See Also incomplete --- ## MakeS32

static SkImageInfo MakeS32(int width, int height, SkAlphaType at)

Creates Image Info marked as sRGB with kN32 SkColorType swizzle. ### Parameters

`width`	incomplete
`height`	incomplete
`at`	incomplete

### Return Value incomplete ### Example

### See Also incomplete --- ## MakeN32Premul

static SkImageInfo MakeN32Premul(int width, int height, sk_sp<SkColorSpace> cs = nullptr)

Sets colortype to kN32 SkColorType, and the alphatype to premul. ### Parameters

`width`	incomplete
`height`	incomplete
`cs`	incomplete

### Return Value incomplete ### Example

### See Also incomplete ---

static SkImageInfo MakeN32Premul(const SkISize& size)

### Parameters

size incomplete

### Return Value incomplete ### Example

### See Also incomplete --- ## MakeA8

static SkImageInfo MakeA8(int width, int height)

### Parameters

`width`	incomplete
`height`	incomplete

### Return Value incomplete ### Example

### See Also incomplete --- ## MakeUnknown

static SkImageInfo MakeUnknown(int width, int height)

### Parameters

`width`	incomplete
`height`	incomplete

### Return Value incomplete ### Example

### See Also incomplete ---

static SkImageInfo MakeUnknown()

### Return Value incomplete ### Example

### See Also incomplete --- ## width

int width() const

### Return Value incomplete ### Example

### See Also incomplete --- ## height

int height() const

### Return Value incomplete ### Example

### See Also incomplete --- ## colorType

SkColorType colorType() const

### Return Value incomplete ### Example

### See Also incomplete --- ## alphaType

SkAlphaType alphaType() const

### Return Value incomplete ### Example

### See Also incomplete --- ## colorSpace

SkColorSpace* colorSpace() const

### Return Value incomplete ### Example

### See Also incomplete --- ## refColorSpace

sk_sp<SkColorSpace> refColorSpace() const

### Return Value incomplete ### Example

### See Also incomplete --- ## isEmpty

bool isEmpty() const

### Return Value incomplete ### Example

### See Also incomplete --- ## isOpaque

bool isOpaque() const

### Return Value incomplete ### Example

### See Also incomplete --- ## dimensions

SkISize dimensions() const

### Return Value incomplete ### Example

### See Also incomplete --- ## bounds

SkIRect bounds() const

### Return Value incomplete ### Example

### See Also incomplete --- ## gammaCloseToSRGB

bool gammaCloseToSRGB() const

### Return Value incomplete ### Example

### See Also incomplete --- ## makeWH

SkImageInfo makeWH(int newWidth, int newHeight) const

Creates Image Info with the same colortype and alphatype as this info, but with the specified width and height. ### Parameters

`newWidth`	incomplete
`newHeight`	incomplete

### Return Value incomplete ### Example

### See Also incomplete --- ## makeAlphaType

SkImageInfo makeAlphaType(SkAlphaType newAlphaType) const

### Parameters

newAlphaType incomplete

### Return Value incomplete ### Example

### See Also incomplete --- ## makeColorType

SkImageInfo makeColorType(SkColorType newColorType) const

### Parameters

newColorType incomplete

### Return Value incomplete ### Example

### See Also incomplete --- ## makeColorSpace

SkImageInfo makeColorSpace(sk_sp<SkColorSpace> cs) const

### Parameters

`cs`	incomplete

### Return Value incomplete ### Example

### See Also incomplete --- ## bytesPerPixel

int bytesPerPixel() const

### Return Value incomplete ### Example

### See Also incomplete --- ## shiftPerPixel

int shiftPerPixel() const

### Return Value incomplete ### Example

### See Also incomplete --- ## minRowBytes64

uint64_t minRowBytes64() const

### Return Value incomplete ### Example

### See Also incomplete --- ## minRowBytes

size_t minRowBytes() const

### Return Value incomplete ### Example

### See Also incomplete --- ## computeOffset

size_t computeOffset(int x, int y, size_t rowBytes) const

### Parameters

`x`	incomplete
`y`	incomplete
`rowBytes`	incomplete

### Return Value incomplete ### Example

### See Also incomplete --- ## operator==

bool operator==(const SkImageInfo& other) _const

### Parameters

other incomplete

### Return Value incomplete ### Example

### See Also incomplete --- ## operator!=

bool operator!=(const SkImageInfo& other) _const

### Parameters

other incomplete

### Return Value incomplete ### Example

### See Also incomplete --- ## unflatten

void unflatten(SkReadBuffer& buffer)

### Parameters

buffer incomplete

### Example

### See Also incomplete --- ## flatten

void flatten(SkWriteBuffer& buffer) const

### Parameters

buffer incomplete

### Example

### See Also incomplete --- ## computeByteSize

size_t computeByteSize(size_t rowBytes) const

Returns the size (in bytes) of the image buffer that this info needs, given the specified rowBytes. The rowBytes must be >= this->minRowBytes. if (height == 0) { return 0; } else { return (height - 1) * rowBytes + width * bytes_per_pixel. If the calculation overflows this returns SK MaxSizeT. ### Parameters

rowBytes incomplete

### Return Value incomplete ### Example

### See Also incomplete --- ## computeMinByteSize

size_t computeMinByteSize() const

Returns the minimum size (in bytes) of the image buffer that this info needs. If the calculation overflows, or if the height is 0, this returns 0. ### Return Value incomplete ### Example

### See Also incomplete --- ## ByteSizeOverflowed

static bool ByteSizeOverflowed(size_t byteSize)

Returns true if the result of computeByteSize (or computeMinByteSize) overflowed ### Parameters

byteSize incomplete

### Return Value incomplete ### Example

### See Also incomplete --- ## validRowBytes

bool validRowBytes(size_t rowBytes) const

### Parameters

rowBytes incomplete

### Return Value incomplete ### Example

### See Also incomplete --- ## reset

void reset()

### Example

### See Also incomplete --- ## validate

void validate() const

### Example

### See Also incomplete ---