GeoImage¶
Namespace: ThinkGeo.Core
public class GeoImage : System.IDisposable
Inheritance object → GeoImage
Implements IDisposable
Properties¶
PathFilename¶
Gets the path filename.
public string PathFilename { get; }
Property Value¶
The path filename.
Opacity¶
Gets or sets the opacity.
public float Opacity { get; set; }
Property Value¶
The opacity.
Width¶
Gets the width.
public int Width { get; }
Property Value¶
The width.
Height¶
Gets the height.
public int Height { get; }
Property Value¶
The height.
NativeImage¶
Gets or sets the NativeImage.
public SKBitmap NativeImage { get; }
Property Value¶
SKBitmap
Constructors¶
GeoImage()¶
Initializes a new instance of the GeoImage class.
public GeoImage()
GeoImage(int, int)¶
Initializes a new instance of the GeoImage class.
public GeoImage(int width, int height)
Parameters¶
width int
The width.
height int
The height.
GeoImage(Stream)¶
Initializes a new instance of the GeoImage class.
public GeoImage(Stream stream)
Parameters¶
stream Stream
The stream.
GeoImage(string)¶
Initializes a new instance of the GeoImage class.
public GeoImage(string pathFilename)
Parameters¶
pathFilename string
The path filename.
GeoImage(Byte[])¶
Initializes a new instance of the GeoImage class.
public GeoImage(Byte[] bytes)
Parameters¶
bytes Byte[]
The bytes.
GeoImage(SKBitmap)¶
Initializes a new instance of the GeoImage class.
public GeoImage(SKBitmap skBitmap)
Parameters¶
skBitmap SKBitmap
A SKBitmap object, it's an cross-platform bitmap object from SKIA-Sharp
Methods¶
CreateCustomizedImage(int, int, GeoColorType, GeoAlphaType)¶
Creates the customized image.
public static GeoImage CreateCustomizedImage(int width, int height, GeoColorType colorType, GeoAlphaType alphaType)
Parameters¶
width int
The width.
height int
The height.
colorType GeoColorType
Type of the color.
alphaType GeoAlphaType
Type of the alpha.
Returns¶
GetImageBytes(GeoImageFormat, int)¶
Gets the image bytes.
public Byte[] GetImageBytes(GeoImageFormat imageFormat, int imageQuality)
Parameters¶
imageFormat GeoImageFormat
The image format.
imageQuality int
The image quality.
Returns¶
ToBytesArray()¶
Converts this instance to a byte array.
public Byte[] ToBytesArray()
Returns¶
Byte[]
A byte array containing the requested data.
GetImageStream(GeoImageFormat, int)¶
Gets the image stream.
public Stream GetImageStream(GeoImageFormat imageFormat, int imageQuality)
Parameters¶
imageFormat GeoImageFormat
The image format.
imageQuality int
The image quality.
Returns¶
Save(Stream, GeoImageFormat, int)¶
Saves the specified stream.
public void Save(Stream stream, GeoImageFormat imageFormat, int quality)
Parameters¶
stream Stream
The stream.
imageFormat GeoImageFormat
The image format.
quality int
The quality.
Returns¶
Save(string, GeoImageFormat, int)¶
Saves the specified file path.
public void Save(string filePath, GeoImageFormat imageFormat, int quality)
Parameters¶
filePath string
The file path.
imageFormat GeoImageFormat
The image format.
quality int
The quality.
Returns¶
Dispose()¶
This method implements the IDispose method. This method is the concrete wrapper for the abstract method DisposeCore.
public void Dispose()
Returns¶
Finalize()¶
Finalizer of this tile object.
protected void Finalize()
Returns¶
Dispose(bool)¶
This method disposes all the unmanaged resource in the tile.
protected void Dispose(bool disposing)
Parameters¶
disposing bool
Returns¶
Remarks:
When implementing this method, consider the stop the background threading when drawing asynchronously.
Clear(GeoColor)¶
Clears the specified color.
public void Clear(GeoColor color)
Parameters¶
color GeoColor
The color.
Returns¶
SetPixels(GeoColor[])¶
Sets the pixels.
public void SetPixels(GeoColor[] pixels)
Parameters¶
pixels GeoColor[]
The pixels.
Returns¶
GetIntPtr()¶
Gets the pixels.
public IntPtr GetIntPtr()
Returns¶
TryGetBgra32Pixels(Byte[]&, Int32&, Int32&, Int32&)¶
Attempts to copy the current image pixels into a BGRA32 byte snapshot.
public bool TryGetBgra32Pixels(Byte[]& pixels, Int32& width, Int32& height, Int32& stride)
Parameters¶
pixels Byte[]&
When this method returns true, contains a BGRA32 pixel snapshot.
width Int32&
The bitmap width.
height Int32&
The bitmap height.
stride Int32&
The destination stride (bytes per row).
Returns¶
bool
True if pixel data could be copied; otherwise, false.
Scale(int, int)¶
Scales the specified width.
public GeoImage Scale(int targetWidth, int targetHeight)
Parameters¶
targetWidth int
The width.
targetHeight int
The height.
Returns¶
TxU=(int, int, SKSamplingOptions)¶
internal GeoImage TxU=(int targetWidth, int targetHeight, SKSamplingOptions samplingOptions)
Parameters¶
targetWidth int
targetHeight int
samplingOptions SKSamplingOptions
Returns¶
Crop(DrawingRectangle)¶
Cuts the specified source rect.
public GeoImage Crop(DrawingRectangle srcRect)
Parameters¶
srcRect DrawingRectangle
The source rect.
Returns¶
Clip(DrawingRectangle, int, int)¶
Performs clip.
public GeoImage Clip(DrawingRectangle clippingRectangle, int clippingWidth, int clippingHeight)
Parameters¶
clippingRectangle DrawingRectangle
The rectangle that defines the area of interest.
clippingWidth int
The clipping width.
clippingHeight int
The clipping height.
Returns¶
GeoImage
The result of the operation.
DrawImage(GeoImage, float, float)¶
Combines the images.
public void DrawImage(GeoImage geoImage, float pointX, float pointY)
Parameters¶
geoImage GeoImage
pointX float
pointY float
Returns¶
DrawText(string, GeoFont, GeoBrush, ScreenPointF[], float)¶
Appends the text.
public void DrawText(string text, GeoFont font, GeoBrush fillBrush, ScreenPointF[] points, float scaleFactor)
Parameters¶
text string
The text.
font GeoFont
The font.
fillBrush GeoBrush
The fill brush.
points ScreenPointF[]
The points.
scaleFactor float
Specifies the scaleFactor.
Returns¶
HasCpuPixelData()¶
Determines whether the underlying SKBitmap has its pixel data laid out in a contiguous CPU‐accessible buffer in RGBA or BGRA format.
public bool HasCpuPixelData()
Returns¶
UBU=(bool, bool, float, float, float, float)¶
internal GeoImage UBU=(bool isGrayscale, bool isNegative, float transparency, float redTranslation, float greenTranslation, float blueTranslation)
Parameters¶
isGrayscale bool
isNegative bool
transparency float
redTranslation float
greenTranslation float
blueTranslation float
Returns¶
URU=(Dictionary<GeoColor, GeoColor>)¶
internal GeoImage URU=(Dictionary<GeoColor, GeoColor> colorMappings)
Parameters¶
colorMappings Dictionary<GeoColor, GeoColor>
Returns¶
VRU=(SKBitmap&)¶
internal bool VRU=(SKBitmap& leasedBitmap)
Parameters¶
leasedBitmap SKBitmap&
Returns¶
VhU=()¶
internal void VhU=()
Returns¶
UseNativeBitmap(Action<SKBitmap>)¶
Executes while safely leasing the underlying bitmap within the callback scope.
public void UseNativeBitmap(Action<SKBitmap> action)
Parameters¶
action Action<SKBitmap>
The callback that receives the leased . The callback must not cache or dispose the bitmap.
Returns¶
UseNativeBitmap<T>(Func<SKBitmap, T>)¶
Executes while safely leasing the underlying bitmap within the callback scope.
public T UseNativeBitmap<T>(Func<SKBitmap, T> func)
Type Parameters¶
T
The result type returned by .
Parameters¶
func Func<SKBitmap, T>
The callback that receives the leased and returns a value. The callback must not cache or dispose the bitmap.
Returns¶
T
The value returned by , or default when the bitmap is unavailable.