Packages

com.aspose.imaging.fileformats.gif

Interfaces

Classes

java.lang.Object
- com.aspose.imaging.DisposableObject
- - com.aspose.imaging.DataStreamSupporter
  - - com.aspose.imaging.Image
    - - com.aspose.imaging.RasterImage
      - com.aspose.imaging.RasterCachedImage
        
        com.aspose.imaging.RasterCachedMultipageImage
        
        com.aspose.imaging.fileformats.gif.GifImage

All Implemented Interfaces:: IMultipageImage, IObjectWithBounds, IRasterImageArgb32PixelLoader, IRasterImageRawDataLoader, com.aspose.imaging_internal.IPixelsSaver, com.aspose.imaging_internal.progressmanagement.IProgressEventHandler, com.aspose.imaging_internal.progressmanagement.IProgressInformer, com.aspose.ms.System.IDisposable, Closeable, AutoCloseable

public final class GifImage
extends RasterCachedMultipageImage

A gif image.

Code example:

This example shows how to create a GIF image and save it to a file.

String dir = "c:\\temp\\";

// Create a GIF Frame block of 100x100 px.
com.aspose.imaging.fileformats.gif.blocks.GifFrameBlock firstBlock = new com.aspose.imaging.fileformats.gif.blocks.GifFrameBlock(100, 100);
try {
    // Fill the entire block in red.
    com.aspose.imaging.Graphics gr = new com.aspose.imaging.Graphics(firstBlock);
    com.aspose.imaging.brushes.SolidBrush brush = new com.aspose.imaging.brushes.SolidBrush(com.aspose.imaging.Color.getRed());
    gr.fillRectangle(brush, firstBlock.getBounds());

    com.aspose.imaging.fileformats.gif.GifImage gifImage = new com.aspose.imaging.fileformats.gif.GifImage(firstBlock);
    try {
        gifImage.save(dir + "output.gif");
    } finally {
        gifImage.dispose();
    }
} finally {
    firstBlock.dispose();
}

Constructor Summary

Constructors
Constructor and Description
`GifImage(GifFrameBlock firstFrame)` Initializes a new instance of the `GifImage` class.
`GifImage(GifFrameBlock firstFrame, IColorPalette globalPalette)` Initializes a new instance of the `GifImage` class.
`GifImage(GifFrameBlock firstFrame, IColorPalette globalPalette, boolean isPaletteSorted, byte paletteColorResolution, byte paletteBackgroundColorIndex, byte aspectRatio, boolean hasTrailer)` Initializes a new instance of the `GifImage` class.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`addBlock(IGifBlock block)` Adds a new GIF block.
`void`	`adjustBrightness(int brightness)` Adjust of a `brightness` for image.
`void`	`adjustContrast(float contrast)` Adjusts the contrast.
`void`	`adjustGamma(float gamma)` Gamma-correction of an image.
`void`	`adjustGamma(float gammaRed, float gammaGreen, float gammaBlue)` Gamma-correction of an image.
`void`	`binarizeBradley(double brightnessDifference)` Binarization of an image using Bradley's adaptive thresholding algorithm using the integral image thresholding
`void`	`binarizeFixed(byte threshold)` Binarization of an image with predefined threshold
`void`	`binarizeOtsu()` Binarization of an image with Otsu thresholding
`void`	`clearBlocks()` Clears all the GIF blocks.
`void`	`crop(Rectangle rectangle)` Cropping the image.
`void`	`dither(int ditheringMethod, int bitsCount, IColorPalette customPalette)` Performs dithering on the current image.
`void`	`filter(Rectangle rectangle, FilterOptionsBase options)` Filters the specified rectangle.
`GifFrameBlock`	`getActiveFrame()` Gets the active frame.
`Color`	`getBackgroundColor()` Gets the background color.
`byte`	`getBackgroundColorIndex()` Gets the background color index.
`IGifBlock[]`	`getBlocks()` Gets the GIF blocks.
`Image`	`getDefaultPage()` Gets the default page.
`long`	`getFileFormat()` Gets a value of file format
`float`	`getImageOpacity()` Gets opacity of this image (active frame).
`int`	`getPageCount()` Gets the page count.
`PageExportingAction`	`getPageExportingAction()` Gets the page exporting action.
`Image[]`	`getPages()` Gets the pages.
`byte`	`getPaletteColorResolutionBits()` Gets or sets the palette color resolution bits.
`byte`	`getPixelAspectRatio()` Gets the pixel aspect ratio.
`Color`	`getTransparentColor()` Gets active frame transparent color.
`XmpPacketWrapper`	`getXmpData()` Gets the XMP metadata.
`void`	`grayscale()` Transformation of an image to its grayscale representation
`boolean`	`hasBackgroundColor()` Gets a value indicating whether image has background color.
`boolean`	`hasTrailer()` Gets or sets a value indicating whether GIF has trailer.
`boolean`	`hasTransparentColor()` Gets a value indicating whether active frame has transparent color.
`void`	`insertBlock(int index, IGifBlock block)` Adds a new GIF block.
`boolean`	`isPaletteSorted()` Gets or sets a value indicating whether palette is sorted.
`void`	`orderBlocks()` Orders the GIF blocks according to the GIF specification.
`void`	`removeBlock(IGifBlock block)` Removes the GIF block.
`void`	`resize(int newWidth, int newHeight, ImageResizeSettings settings)` Resizes the image.
`void`	`resize(int newWidth, int newHeight, int resizeType)` Resizes the image.
`void`	`resizeProportional(int newWidth, int newHeight, int resizeType)` Performs proportional resize on the image.
`void`	`rotate(float angle, boolean resizeProportionally, Color backgroundColor)` `!:RasterCahcedMultipageImage.Rotate` image around the center.
`void`	`rotateFlip(int rotateFlipType)` Rotates, flips, or rotates and flips the Active frame only.
`void`	`setActiveFrame(GifFrameBlock value)` Sets the active frame.
`void`	`setBackgroundColor(Color value)` Sets the background color.
`void`	`setBackgroundColorIndex(byte value)` Sets the background color index.
`void`	`setPageExportingAction(PageExportingAction value)` Sets the page exporting action.
`void`	`setPaletteColorResolutionBits(byte value)` Sets the palette color resolution bits.
`void`	`setPaletteSorted(boolean value)` Gets or sets a value indicating whether palette is sorted.
`void`	`setPixelAspectRatio(byte value)` Sets the pixel aspect ratio.
`void`	`setTrailer(boolean value)` Gets or sets a value indicating whether GIF has trailer.
`void`	`setTransparentColor(boolean value)` A value indicating whether active frame has transparent color.
`void`	`setXmpData(XmpPacketWrapper value)` Sets the XMP metadata.

Methods inherited from class com.aspose.imaging.RasterCachedMultipageImage
binarizeBradley, cacheData, crop, getBitsPerPixel, getHeight, getWidth, hasAlpha, isCached, normalizeAngle, replaceColor, replaceNonTransparentColors, resizeHeightProportionally, resizeWidthProportionally, rotateFlipAll

Methods inherited from class com.aspose.imaging.RasterImage
dither, getArgb32Pixel, getDefaultArgb32Pixels, getDefaultPixels, getDefaultRawData, getDefaultRawData, getHorizontalResolution, getModifyDate, getPixel, getPremultiplyComponents, getRawCustomColorConverter, getRawDataFormat, getRawDataSettings, getRawFallbackIndex, getRawIndexedColorConverter, getRawLineSize, getSkewAngle, getUpdateXmpData, getUseRawData, getVerticalResolution, isRawDataAvailable, loadArgb32Pixels, loadArgb64Pixels, loadCmyk32Pixels, loadCmykPixels, loadPartialArgb32Pixels, loadPartialPixels, loadPixels, loadRawData, loadRawData, normalizeAngle, readArgb32ScanLine, readScanLine, replaceColor, replaceNonTransparentColors, rotate, saveArgb32Pixels, saveCmyk32Pixels, saveCmykPixels, savePixels, saveRawData, setArgb32Pixel, setHorizontalResolution, setPalette, setPixel, setPremultiplyComponents, setRawCustomColorConverter, setRawFallbackIndex, setRawIndexedColorConverter, setResolution, setTransparentColor, setUpdateXmpData, setUseRawData, setVerticalResolution, toBitmap, writeArgb32ScanLine, writeScanLine

Methods inherited from class com.aspose.imaging.DataStreamSupporter
getDataStreamContainer, save, save, save, save

Methods inherited from class com.aspose.imaging.DisposableObject
close, dispose, getDisposed

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

GifImage

public GifImage(GifFrameBlock firstFrame,
                IColorPalette globalPalette)

Initializes a new instance of the GifImage class.

Parameters:

firstFrame - The first frame to initialize gif image with.

globalPalette - The global palette to use. Note if both firstFrame and globalPalette are null then default global palette is used.

Throws:

com.aspose.ms.System.ArgumentNullException - The frame cannot be null;firstFrame

com.aspose.ms.System.ArgumentException - The first frame already belongs to some other image. Check the Container property.;firstFrame

GifImageException - The palette specified should contain entries count equal to power of 2. Minimal palette size is 2, maximal is 256.

Code example:

This example shows how to create a GIF image with a custom palette and save it to a file.

String dir = "c:\\temp\\";

// Create a GIF Frame block of 100x100 px.
com.aspose.imaging.fileformats.gif.blocks.GifFrameBlock firstBlock = new com.aspose.imaging.fileformats.gif.blocks.GifFrameBlock(100, 100);
try {
    // Fill the entire block in red.
    com.aspose.imaging.Graphics gr = new com.aspose.imaging.Graphics(firstBlock);
    com.aspose.imaging.brushes.SolidBrush brush = new com.aspose.imaging.brushes.SolidBrush(com.aspose.imaging.Color.getRed());
    gr.fillRectangle(brush, firstBlock.getBounds());

    // Use 4-bit palette to reduce the image size. The quality can get worse.
    com.aspose.imaging.IColorPalette palette = com.aspose.imaging.ColorPaletteHelper.create4Bit();

    com.aspose.imaging.fileformats.gif.GifImage gifImage = new com.aspose.imaging.fileformats.gif.GifImage(firstBlock, palette);
    try {
        gifImage.save(dir + "output.gif");
    } finally {
        gifImage.dispose();
    }
} finally {
    firstBlock.dispose();
}

GifImage

public GifImage(GifFrameBlock firstFrame)

Initializes a new instance of the GifImage class.

Parameters:

firstFrame - The first frame to initialize gif image with.

Throws:

com.aspose.ms.System.ArgumentNullException - The frame cannot be null;firstFrame

com.aspose.ms.System.ArgumentException - The first frame already belongs to some other image. Check the Container property.;firstFrame

GifImageException - The palette specified should contain entries count equal to power of 2. Minimal palette size is 2, maximal is 256.

Code example:

The following example shows how to compose an animated GIF image from individual GIF blocks.

String dir = "c:\\temp\\";

// Create a GIF image 100 x 100 px.
// The first block is fully black by default.
com.aspose.imaging.fileformats.gif.blocks.GifFrameBlock firstBlock = new com.aspose.imaging.fileformats.gif.blocks.GifFrameBlock(100, 100);
com.aspose.imaging.fileformats.gif.GifImage gifImage = new com.aspose.imaging.fileformats.gif.GifImage(firstBlock);
try {
    // The first circle is red
    com.aspose.imaging.brushes.SolidBrush brush1 = new com.aspose.imaging.brushes.SolidBrush(com.aspose.imaging.Color.getRed());

    // The second circle is black
    com.aspose.imaging.brushes.SolidBrush brush2 = new com.aspose.imaging.brushes.SolidBrush(com.aspose.imaging.Color.getBlack());

    // Gradually increase the angle of the red arc shape.
    for (int angle = 10; angle <= 360; angle += 10) {
        com.aspose.imaging.fileformats.gif.blocks.GifFrameBlock block = new com.aspose.imaging.fileformats.gif.blocks.GifFrameBlock(100, 100);

        com.aspose.imaging.Graphics gr = new com.aspose.imaging.Graphics(block);
        gr.fillPie(brush1, block.getBounds(), 0, angle);

        gifImage.addBlock(block);
    }

    // Gradually increase the angle of the black arc and wipe out the red arc.
    for (int angle = 10; angle <= 360; angle += 10) {
        com.aspose.imaging.fileformats.gif.blocks.GifFrameBlock block = new com.aspose.imaging.fileformats.gif.blocks.GifFrameBlock(100, 100);

        com.aspose.imaging.Graphics gr = new com.aspose.imaging.Graphics(block);
        gr.fillPie(brush2, block.getBounds(), 0, angle);
        gr.fillPie(brush1, block.getBounds(), angle, 360 - angle);

        gifImage.addBlock(block);
    }

    gifImage.save(dir + "animated_radar.gif");
} finally {
    firstBlock.dispose();
    gifImage.dispose();
}

GifImage
```
public GifImage(GifFrameBlock firstFrame,
                IColorPalette globalPalette,
                boolean isPaletteSorted,
                byte paletteColorResolution,
                byte paletteBackgroundColorIndex,
                byte aspectRatio,
                boolean hasTrailer)
```
Initializes a new instance of the GifImage class.

Parameters:

firstFrame - The first frame to initialize gif image with.

globalPalette - The global palette to use. Note if both firstFrame and globalPalette are null then default global palette is used.

isPaletteSorted - if set to true the palette is sorted. Note the parameter is used when globalPalette is not null.

paletteColorResolution - The palette color resolution. Note the parameter is used when globalPalette is not null.

paletteBackgroundColorIndex - The palette background color index.

aspectRatio - The aspect ratio.

hasTrailer - if set to true the gif image has trailer otherwise no trailer written at the end of the stream.

Throws:

com.aspose.ms.System.ArgumentNullException - The frame cannot be null;firstFrame

com.aspose.ms.System.ArgumentException - The first frame already belongs to some other image. Check the Container property.;firstFrame

GifImageException - The palette specified should contain entries count equal to power of 2. Minimal palette size is 2, maximal is 256.

Method Detail

getFileFormat
```
public long getFileFormat()
```
Gets a value of file format

Overrides:

getFileFormat in class Image

getXmpData
```
public XmpPacketWrapper getXmpData()
```
Gets the XMP metadata.

Overrides:

getXmpData in class RasterCachedMultipageImage

Returns:

The XMP metadata.

setXmpData
```
public void setXmpData(XmpPacketWrapper value)
```
Sets the XMP metadata.

Overrides:

setXmpData in class RasterCachedMultipageImage

Parameters:

value - The XMP metadata.

hasTrailer
```
public boolean hasTrailer()
```
Gets or sets a value indicating whether GIF has trailer.

Returns:

true if GIF has trailer; otherwise, false.

setTrailer
```
public void setTrailer(boolean value)
```
Gets or sets a value indicating whether GIF has trailer.

Parameters:

value - true if GIF has trailer; otherwise, false.

isPaletteSorted
```
public boolean isPaletteSorted()
```
Gets or sets a value indicating whether palette is sorted.

Returns:

true if palette is sorted; otherwise, false.

setPaletteSorted
```
public void setPaletteSorted(boolean value)
```
Gets or sets a value indicating whether palette is sorted.

Parameters:

value - true if palette is sorted; otherwise, false.

getPaletteColorResolutionBits
```
public byte getPaletteColorResolutionBits()
```
Gets or sets the palette color resolution bits.

Returns:

The palette color resolution bits.

setPaletteColorResolutionBits
```
public void setPaletteColorResolutionBits(byte value)
```
Sets the palette color resolution bits.

Parameters:

value - The palette color resolution bits.

getPageCount
```
public int getPageCount()
```
Gets the page count.
Value: The page count. <autogeneratedoc></autogeneratedoc>

Specified by:

getPageCount in interface IMultipageImage

Specified by:

getPageCount in class RasterCachedMultipageImage

Returns:

the page count.

getPages
```
public Image[] getPages()
```
Gets the pages.
Value: The pages. <autogeneratedoc></autogeneratedoc>

Specified by:

getPages in interface IMultipageImage

Specified by:

getPages in class RasterCachedMultipageImage

Returns:

the pages.

getDefaultPage
```
public Image getDefaultPage()
```
Gets the default page.
Value: The default page. <autogeneratedoc></autogeneratedoc>

Specified by:

getDefaultPage in interface IMultipageImage

Specified by:

getDefaultPage in class RasterCachedMultipageImage

Returns:

the default page.

getBlocks
```
public final IGifBlock[] getBlocks()
```
Gets the GIF blocks.

Returns:

the GIF blocks.

getActiveFrame

public final GifFrameBlock getActiveFrame()

Gets the active frame.

Value: The active frame.

Returns:

the active frame.

Code example:

The following example shows how to remove all blocks from a GIF image.

com.aspose.imaging.fileformats.gif.blocks.GifFrameBlock firstBlock = new com.aspose.imaging.fileformats.gif.blocks.GifFrameBlock(100, 100);
com.aspose.imaging.fileformats.gif.GifImage gifImage = new com.aspose.imaging.fileformats.gif.GifImage(firstBlock);
try {
    if (gifImage.getActiveFrame() != null) {
        System.out.println("Active frame size: " + gifImage.getActiveFrame().getSize());
    } else {
        System.out.println("Active frame is not set");
    }

    System.out.println("Clear all the blocks");
    gifImage.clearBlocks();

    if (gifImage.getActiveFrame() != null) {
        System.out.println("Active frame size: " + gifImage.getActiveFrame().getSize());
    } else {
        System.out.println("Active frame is not set");
    }
} finally {
    firstBlock.dispose();
    gifImage.dispose();
}

// The output looks like this:
// Active frame size: { Width = 100, Height = 100}
// Clear all the blocks
// Active frame is not set

setActiveFrame
```
public final void setActiveFrame(GifFrameBlock value)
```
Sets the active frame.
Value: The active frame.

Parameters:

value - the active frame.

getBackgroundColor
```
public Color getBackgroundColor()
```
Gets the background color.
Value: The background color.

Overrides:

getBackgroundColor in class RasterCachedMultipageImage

Returns:

the background color.

setBackgroundColor
```
public void setBackgroundColor(Color value)
```
Sets the background color.
Value: The background color.

Overrides:

setBackgroundColor in class RasterCachedMultipageImage

Parameters:

value - the background color.

getBackgroundColorIndex
```
public final byte getBackgroundColorIndex()
```
Gets the background color index.
Value: The background color index.

Returns:

the background color index.

setBackgroundColorIndex
```
public final void setBackgroundColorIndex(byte value)
```
Sets the background color index.
Value: The background color index.

Parameters:

value - the background color index.

getPixelAspectRatio
```
public final byte getPixelAspectRatio()
```
Gets the pixel aspect ratio.
Value: The pixel aspect ratio.

Returns:

the pixel aspect ratio.

setPixelAspectRatio
```
public final void setPixelAspectRatio(byte value)
```
Sets the pixel aspect ratio.
Value: The pixel aspect ratio.

Parameters:

value - the pixel aspect ratio.

hasTransparentColor
```
public boolean hasTransparentColor()
```
Gets a value indicating whether active frame has transparent color.

Overrides:

hasTransparentColor in class RasterCachedMultipageImage

Returns:

a value indicating whether active frame has transparent color.

setTransparentColor
```
public void setTransparentColor(boolean value)
```
A value indicating whether active frame has transparent color.

Overrides:

setTransparentColor in class RasterImage

Parameters:

value - a value indicating whether active frame has transparent color.

getTransparentColor
```
public Color getTransparentColor()
```
Gets active frame transparent color.

Overrides:

getTransparentColor in class RasterImage

Returns:

active frame transparent color.

hasBackgroundColor
```
public boolean hasBackgroundColor()
```
Gets a value indicating whether image has background color.

Overrides:

hasBackgroundColor in class Image

Returns:

a value indicating whether image has background color.

getImageOpacity
```
public float getImageOpacity()
```
Gets opacity of this image (active frame).
Value: The opacity value between 0.0 (fully transparent) and 1.0 (fully opaque).

Overrides:

getImageOpacity in class RasterCachedMultipageImage

Returns:

opacity of this image (active frame).

getPageExportingAction
```
public PageExportingAction getPageExportingAction()
```
Gets the page exporting action. Please note that setting this method will automatically release page resources after it is executed. It will be executed just before each page is saved.
Value: The page exporting action.

Specified by:

getPageExportingAction in interface IMultipageImage

Overrides:

getPageExportingAction in class RasterCachedMultipageImage

Returns:

the page exporting action.

setPageExportingAction
```
public void setPageExportingAction(PageExportingAction value)
```
Sets the page exporting action. Please note that setting this method will automatically release page resources after it is executed. It will be executed just before each page is saved.
Value: The page exporting action.

Specified by:

setPageExportingAction in interface IMultipageImage

Overrides:

setPageExportingAction in class RasterCachedMultipageImage

Parameters:

value - the page exporting action.

resize

public void resize(int newWidth,
                   int newHeight,
                   int resizeType)

Resizes the image.

Overrides:

resize in class RasterCachedMultipageImage

Parameters:

newWidth - The new width.

newHeight - The new height.

resizeType - The resize type.

Code example:

This example loads a GIF image and resizes it using various resizing methods.

String dir = "c:\\temp\\";

com.aspose.imaging.fileformats.gif.GifImage image = (com.aspose.imaging.fileformats.gif.GifImage) com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    // Scale up by 2 times using Nearest Neighbour resampling.
    image.resize(image.getWidth() * 2, image.getHeight() * 2, com.aspose.imaging.ResizeType.NearestNeighbourResample);
    image.save(dir + "upsample.nearestneighbour.gif");
} finally {
    image.dispose();
}

image = (com.aspose.imaging.fileformats.gif.GifImage) com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    // Scale down by 2 times using Nearest Neighbour resampling.
    image.resize(image.getWidth() / 2, image.getHeight() / 2, com.aspose.imaging.ResizeType.NearestNeighbourResample);
    image.save(dir + "downsample.nearestneighbour.gif");
} finally {
    image.dispose();
}

image = (com.aspose.imaging.fileformats.gif.GifImage) com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    // Scale up by 2 times using Bilinear resampling.
    image.resize(image.getWidth() * 2, image.getHeight() * 2, com.aspose.imaging.ResizeType.BilinearResample);
    image.save(dir + "upsample.bilinear.gif");
} finally {
    image.dispose();
}

image = (com.aspose.imaging.fileformats.gif.GifImage) com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    // Scale down by 2 times using Bilinear resampling.
    image.resize(image.getWidth() / 2, image.getHeight() / 2, com.aspose.imaging.ResizeType.BilinearResample);
    image.save(dir + "downsample.bilinear.gif");
} finally {
    image.dispose();
}

rotateFlip

public void rotateFlip(int rotateFlipType)

Rotates, flips, or rotates and flips the Active frame only.

Overrides:

rotateFlip in class RasterCachedMultipageImage

Parameters:

rotateFlipType - The rotate flip type.

See Also:

RotateFlipType

Code example:

This example loads a GIF image, rotates it by 90 degrees clockwise and optionally flips the image horizontally and(or) vertically.


// The helper class used in the main example below.
class Utils {
    // The helper method to get a string representation of the file format.
    public String getRotateFlipTypeString(int rotateFlipType) {
        if (rotateFlipType == com.aspose.imaging.RotateFlipType.RotateNoneFlipNone) {
            return "RotateNoneFlipNone";
        } else if (rotateFlipType == com.aspose.imaging.RotateFlipType.Rotate90FlipNone) {
            return "Rotate90FlipNone";
        } else if (rotateFlipType == com.aspose.imaging.RotateFlipType.Rotate180FlipNone) {
            return "Rotate180FlipNone";
        } else if (rotateFlipType == com.aspose.imaging.RotateFlipType.Rotate270FlipNone) {
            return "Rotate270FlipNone";
        } else if (rotateFlipType == com.aspose.imaging.RotateFlipType.RotateNoneFlipX) {
            return "RotateNoneFlipX";
        } else if (rotateFlipType == com.aspose.imaging.RotateFlipType.Rotate90FlipX) {
            return "Rotate90FlipX";
        } else if (rotateFlipType == com.aspose.imaging.RotateFlipType.Rotate180FlipX) {
            return "Rotate180FlipX";
        } else if (rotateFlipType == com.aspose.imaging.RotateFlipType.Rotate270FlipX) {
            return "Rotate270FlipX";
        } else if (rotateFlipType == com.aspose.imaging.RotateFlipType.RotateNoneFlipY) {
            return "RotateNoneFlipY";
        } else if (rotateFlipType == com.aspose.imaging.RotateFlipType.Rotate90FlipY) {
            return "Rotate90FlipY";
        } else if (rotateFlipType == com.aspose.imaging.RotateFlipType.Rotate180FlipY) {
            return "Rotate180FlipY";
        } else if (rotateFlipType == com.aspose.imaging.RotateFlipType.Rotate270FlipY) {
            return "Rotate270FlipY";
        } else if (rotateFlipType == com.aspose.imaging.RotateFlipType.RotateNoneFlipXY) {
            return "RotateNoneFlipXY";
        } else if (rotateFlipType == com.aspose.imaging.RotateFlipType.Rotate90FlipXY) {
            return "Rotate90FlipXY";
        } else if (rotateFlipType == com.aspose.imaging.RotateFlipType.Rotate180FlipXY) {
            return "Rotate180FlipXY";
        } else if (rotateFlipType == com.aspose.imaging.RotateFlipType.Rotate270FlipXY) {
            return "Rotate270FlipXY";
        } else {
            return "UNDEFINED";
        }
    }
}

// Here is the main example
Utils utils = new Utils();

String dir = "c:\\temp\\";

int[] rotateFlipTypes = new int[]
        {
                com.aspose.imaging.RotateFlipType.Rotate90FlipNone,
                com.aspose.imaging.RotateFlipType.Rotate90FlipX,
                com.aspose.imaging.RotateFlipType.Rotate90FlipXY,
                com.aspose.imaging.RotateFlipType.Rotate90FlipY,
        };

for (int rotateFlipType : rotateFlipTypes) {
    // Rotate, flip and save to the output file.
    com.aspose.imaging.fileformats.gif.GifImage image = (com.aspose.imaging.fileformats.gif.GifImage) com.aspose.imaging.Image.load(dir + "sample.gif");
    try {
        image.rotateFlip(rotateFlipType);
        image.save(dir + "sample." + utils.getRotateFlipTypeString(rotateFlipType) + ".png", new com.aspose.imaging.imageoptions.PngOptions());
    } finally {
        image.dispose();
    }
}

dither

public void dither(int ditheringMethod,
                   int bitsCount,
                   IColorPalette customPalette)

Performs dithering on the current image.

Overrides:

dither in class RasterCachedMultipageImage

Parameters:

ditheringMethod - The dithering method.

bitsCount - The final bits count for dithering.

customPalette - The custom palette for dithering.

Code example:

The following example loads a GIF image and performs threshold and floyd dithering using different palette depth.

String dir = "c:\\temp\\";

com.aspose.imaging.Image image = com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    com.aspose.imaging.fileformats.gif.GifImage gifImage = (com.aspose.imaging.fileformats.gif.GifImage) image;

    // Perform threshold dithering using 4-bit color palette which contains 16 colors.
    // The more bits specified the higher quality and the bigger size of the output image.
    // Note that only 1-bit, 4-bit and 8-bit palettes are supported at the moment.
    gifImage.dither(com.aspose.imaging.DitheringMethod.ThresholdDithering, 4, null);

    gifImage.save(dir + "sample.ThresholdDithering4.png", new com.aspose.imaging.imageoptions.PngOptions());
} finally {
    image.dispose();
}

image = com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    com.aspose.imaging.fileformats.gif.GifImage gifImage = (com.aspose.imaging.fileformats.gif.GifImage) image;

    // Perform floyd dithering using 1-bit color palette which contains only 2 colors - black and white.
    // The more bits specified the higher quality and the bigger size of the output image.
    // Note that only 1-bit, 4-bit and 8-bit palettes are supported at the moment.
    gifImage.dither(com.aspose.imaging.DitheringMethod.FloydSteinbergDithering, 1, null);

    gifImage.save(dir + "sample.FloydSteinbergDithering1.png", new com.aspose.imaging.imageoptions.PngOptions());
} finally {
    image.dispose();
}

crop

public void crop(Rectangle rectangle)

Cropping the image.

Overrides:

crop in class RasterCachedMultipageImage

Parameters:

rectangle - The rectangle.

Code example:

The following example crops a GIF image. The cropping area is be specified via Aspose.Imaging.Rectangle.

String dir = "c:\\temp\\";

com.aspose.imaging.Image image = com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    com.aspose.imaging.fileformats.gif.GifImage gifImage = (com.aspose.imaging.fileformats.gif.GifImage) image;

    // Crop the image. The cropping area is the rectangular central area of the image.
    com.aspose.imaging.Rectangle area = new com.aspose.imaging.Rectangle(
            gifImage.getWidth() / 4,
            gifImage.getHeight() / 4,
            gifImage.getWidth() / 2,
            gifImage.getHeight() / 2);
    gifImage.crop(area);

    // Save the cropped image to PNG
    gifImage.save(dir + "sample.Crop.png", new com.aspose.imaging.imageoptions.PngOptions());
} finally {
    image.dispose();
}

adjustGamma

public void adjustGamma(float gamma)

Gamma-correction of an image.

Overrides:

adjustGamma in class RasterCachedMultipageImage

Parameters:

gamma - Gamma for red, green and blue channels coefficient

Code example:

The following example performs gamma-correction of a GIF image.

String dir = "c:\\temp\\";

com.aspose.imaging.Image image = com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    com.aspose.imaging.fileformats.gif.GifImage gifImage = (com.aspose.imaging.fileformats.gif.GifImage) image;

    // Set gamma coefficient for red, green and blue channels.
    gifImage.adjustGamma(2.5f);
    gifImage.save(dir + "sample.AdjustGamma.png", new com.aspose.imaging.imageoptions.PngOptions());
} finally {
    image.dispose();
}

filter

public void filter(Rectangle rectangle,
                   FilterOptionsBase options)

Filters the specified rectangle.

Overrides:

filter in class RasterCachedMultipageImage

Parameters:

rectangle - The rectangle.

options - The options.

Code example:

The following example applies various types of filters to a GIF image.

String dir = "c:\\temp\\";

com.aspose.imaging.Image image = com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    com.aspose.imaging.fileformats.gif.GifImage gifImage = (com.aspose.imaging.fileformats.gif.GifImage) image;

    // Apply a median filter with a rectangle size of 5 to the entire image.
    gifImage.filter(gifImage.getBounds(), new com.aspose.imaging.imagefilters.filteroptions.MedianFilterOptions(5));
    gifImage.save(dir + "sample.MedianFilter.png", new com.aspose.imaging.imageoptions.PngOptions());
} finally {
    image.dispose();
}

image = com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    com.aspose.imaging.fileformats.gif.GifImage gifImage = (com.aspose.imaging.fileformats.gif.GifImage) image;

    // Apply a bilateral smoothing filter with a kernel size of 5 to the entire image.
    gifImage.filter(gifImage.getBounds(), new com.aspose.imaging.imagefilters.filteroptions.BilateralSmoothingFilterOptions(5));
    gifImage.save(dir + "sample.BilateralSmoothingFilter.png", new com.aspose.imaging.imageoptions.PngOptions());
} finally {
    image.dispose();
}

image = com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    com.aspose.imaging.fileformats.gif.GifImage gifImage = (com.aspose.imaging.fileformats.gif.GifImage) image;

    // Apply a Gaussian blur filter with a radius of 5 and a sigma value of 4.0 to the entire image.
    gifImage.filter(gifImage.getBounds(), new com.aspose.imaging.imagefilters.filteroptions.GaussianBlurFilterOptions(5, 4.0));
    gifImage.save(dir + "sample.GaussianBlurFilter.png", new com.aspose.imaging.imageoptions.PngOptions());
} finally {
    image.dispose();
}

image = com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    com.aspose.imaging.fileformats.gif.GifImage gifImage = (com.aspose.imaging.fileformats.gif.GifImage) image;

    // Apply a Gauss-Wiener filter with a radius of 5 and a smooth value of 4.0 to the entire image.
    gifImage.filter(gifImage.getBounds(), new com.aspose.imaging.imagefilters.filteroptions.GaussWienerFilterOptions(5, 4.0));
    gifImage.save(dir + "sample.GaussWienerFilter.png", new com.aspose.imaging.imageoptions.PngOptions());
} finally {
    image.dispose();
}

image = com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    com.aspose.imaging.fileformats.gif.GifImage gifImage = (com.aspose.imaging.fileformats.gif.GifImage) image;

    // Apply a motion wiener filter with a length of 5, a smooth value of 4.0 and an angle of 90.0 degrees to the entire image.
    gifImage.filter(gifImage.getBounds(), new com.aspose.imaging.imagefilters.filteroptions.MotionWienerFilterOptions(10, 1.0, 90.0));
    gifImage.save(dir + "sample.MotionWienerFilter.png", new com.aspose.imaging.imageoptions.PngOptions());
} finally {
    image.dispose();
}

image = com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    com.aspose.imaging.fileformats.gif.GifImage gifImage = (com.aspose.imaging.fileformats.gif.GifImage) image;

    // Apply a sharpen filter with a kernel size of 5 and a sigma value of 4.0 to the entire image.
    gifImage.filter(gifImage.getBounds(), new com.aspose.imaging.imagefilters.filteroptions.SharpenFilterOptions(5, 4.0));
    gifImage.save(dir + "sample.SharpenFilter.png", new com.aspose.imaging.imageoptions.PngOptions());
} finally {
    image.dispose();
}

resize

public void resize(int newWidth,
                   int newHeight,
                   ImageResizeSettings settings)

Resizes the image.

Overrides:

resize in class RasterCachedMultipageImage

Parameters:

newWidth - The new width.

newHeight - The new height.

settings - The resize settings.

Code example:

This example loads a GIF image and resizes it using various resizing settings.

String dir = "c:\\temp\\";

com.aspose.imaging.ImageResizeSettings resizeSettings = new com.aspose.imaging.ImageResizeSettings();

// The adaptive algorithm based on weighted and blended rational function and lanczos3 interpolation.
resizeSettings.setMode(com.aspose.imaging.ResizeType.AdaptiveResample);

// The small rectangular filter
resizeSettings.setFilterType(com.aspose.imaging.ImageFilterType.SmallRectangular);

// The number of colors in the palette.
resizeSettings.setEntriesCount(256);

// The color quantization is not used
resizeSettings.setColorQuantizationMethod(com.aspose.imaging.ColorQuantizationMethod.None);

// The Euclidian method
resizeSettings.setColorCompareMethod(com.aspose.imaging.ColorCompareMethod.Euclidian);

com.aspose.imaging.Image image = com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    com.aspose.imaging.fileformats.gif.GifImage gifImage = (com.aspose.imaging.fileformats.gif.GifImage) image;

    // Scale down by 2 times using adaptive resampling.
    gifImage.resize(image.getWidth() / 2, image.getHeight() / 2, resizeSettings);

    // Save to PNG
    gifImage.save(dir + "downsample.adaptive.png", new com.aspose.imaging.imageoptions.PngOptions());
} finally {
    image.dispose();
}

adjustBrightness

public void adjustBrightness(int brightness)

Adjust of a brightness for image.

Overrides:

adjustBrightness in class RasterCachedMultipageImage

Parameters:

brightness - Brightness value.

Code example:

The following example performs brightness correction of a GIF image.

String dir = "c:\\temp\\";

com.aspose.imaging.Image image = com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    com.aspose.imaging.fileformats.gif.GifImage gifImage = (com.aspose.imaging.fileformats.gif.GifImage) image;

    // Set the brightness value. The accepted values of brightness are in the range [-255, 255].
    gifImage.adjustBrightness(50);
    gifImage.save(dir + "sample.AdjustBrightness.png", new com.aspose.imaging.imageoptions.PngOptions());
} finally {
    image.dispose();
}

adjustContrast

public void adjustContrast(float contrast)

Adjusts the contrast.

Overrides:

adjustContrast in class RasterCachedMultipageImage

Parameters:

contrast - Contrast value (in range [-100; 100])

Throws:

ImageException - Can't change contrast. Frame index: " + frameIndex

Code example:

The following example performs contrast correction of a GIF image.

String dir = "c:\\temp\\";

com.aspose.imaging.Image image = com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    com.aspose.imaging.fileformats.gif.GifImage gifImage = (com.aspose.imaging.fileformats.gif.GifImage) image;

    // Set the contrast value. The accepted values of contrast are in the range [-100f, 100f].
    gifImage.adjustContrast(50f);
    gifImage.save(dir + "sample.AdjustContrast.png", new com.aspose.imaging.imageoptions.PngOptions());
} finally {
    image.dispose();
}

adjustGamma

public void adjustGamma(float gammaRed,
                        float gammaGreen,
                        float gammaBlue)

Gamma-correction of an image.

Overrides:

adjustGamma in class RasterCachedMultipageImage

Parameters:

gammaRed - Gamma for red channel coefficient

gammaGreen - Gamma for green channel coefficient

gammaBlue - Gamma for blue channel coefficient

Code example:

The following example performs gamma-correction of a GIF image applying different coefficients for color components.

String dir = "c:\\temp\\";

com.aspose.imaging.Image image = com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    com.aspose.imaging.fileformats.gif.GifImage gifImage = (com.aspose.imaging.fileformats.gif.GifImage) image;

    // Set individual gamma coefficients for red, green and blue channels.
    gifImage.adjustGamma(1.5f, 2.5f, 3.5f);
    gifImage.save(dir + "sample.AdjustGamma.png", new com.aspose.imaging.imageoptions.PngOptions());
} finally {
    image.dispose();
}

grayscale

public void grayscale()

Transformation of an image to its grayscale representation

Overrides:

grayscale in class RasterCachedMultipageImage

Code example:

The following example transforms a colored GIF image to its grayscale representation. Grayscale images are composed exclusively of shades of gray and carry only intensity information.

String dir = "c:\\temp\\";

com.aspose.imaging.Image image = com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    com.aspose.imaging.fileformats.gif.GifImage gifImage = (com.aspose.imaging.fileformats.gif.GifImage) image;

    gifImage.grayscale();
    gifImage.save(dir + "sample.Grayscale.png", new com.aspose.imaging.imageoptions.PngOptions());
} finally {
    image.dispose();
}

binarizeFixed

public void binarizeFixed(byte threshold)

Binarization of an image with predefined threshold

Overrides:

binarizeFixed in class RasterCachedMultipageImage

Parameters:

threshold - Threshold value. If corresponding gray value of a pixel is greater than threshold, a value of 255 will be assigned to it, 0 otherwise.

Code example:

The following example binarizes a GIF image with the predefined threshold. Binarized images contain only 2 colors - black and white.

String dir = "c:\\temp\\";

com.aspose.imaging.Image image = com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    com.aspose.imaging.fileformats.gif.GifImage djvuImage = (com.aspose.imaging.fileformats.gif.GifImage) image;

    // Binarize the image with a threshold value of 127.
    // If a corresponding gray value of a pixel is greater than 127, a value of 255 will be assigned to it, 0 otherwise.
    djvuImage.binarizeFixed((byte) 127);
    djvuImage.save(dir + "sample.BinarizeFixed.png", new com.aspose.imaging.imageoptions.PngOptions());
} finally {
    image.dispose();
}

binarizeOtsu

public void binarizeOtsu()

Binarization of an image with Otsu thresholding

Overrides:

binarizeOtsu in class RasterCachedMultipageImage

Code example:

The following example binarizes a GIF image with Otsu thresholding. Binarized images contain only 2 colors - black and white.

String dir = "c:\\temp\\";

com.aspose.imaging.Image image = com.aspose.imaging.Image.load(dir + "sample.gif");
try {
    com.aspose.imaging.fileformats.gif.GifImage gifImage = (com.aspose.imaging.fileformats.gif.GifImage) image;

    // Binarize the image with Otsu thresholding.
    gifImage.binarizeOtsu();
    gifImage.save(dir + "sample.BinarizeOtsu.png", new com.aspose.imaging.imageoptions.PngOptions());
} finally {
    image.dispose();
}

binarizeBradley
```
public void binarizeBradley(double brightnessDifference)
```
Binarization of an image using Bradley's adaptive thresholding algorithm using the integral image thresholding

Overrides:

binarizeBradley in class RasterCachedMultipageImage

Parameters:

brightnessDifference - The brightness difference between pixel and the average of an s x s window of pixels centered around this pixel.

orderBlocks
```
public final void orderBlocks()
```
Orders the GIF blocks according to the GIF specification. Some GifGraphicsControlBlock may be removed for proper GIF layout.

clearBlocks

public final void clearBlocks()

Clears all the GIF blocks.

Code example:

The following example shows how to remove all blocks from a GIF image.

com.aspose.imaging.fileformats.gif.blocks.GifFrameBlock firstBlock = new com.aspose.imaging.fileformats.gif.blocks.GifFrameBlock(100, 100);
com.aspose.imaging.fileformats.gif.GifImage gifImage = new com.aspose.imaging.fileformats.gif.GifImage(firstBlock);
try {
    if (gifImage.getActiveFrame() != null) {
        System.out.println("Active frame size: " + gifImage.getActiveFrame().getSize());
    } else {
        System.out.println("Active frame is not set");
    }

    System.out.println("Clear all the blocks");
    gifImage.clearBlocks();

    if (gifImage.getActiveFrame() != null) {
        System.out.println("Active frame size: " + gifImage.getActiveFrame().getSize());
    } else {
        System.out.println("Active frame is not set");
    }
} finally {
    firstBlock.dispose();
    gifImage.dispose();
}

// The output looks like this:
// Active frame size: { Width = 100, Height = 100}
// Clear all the blocks
// Active frame is not set

insertBlock
```
public final void insertBlock(int index,
                              IGifBlock block)
```
Adds a new GIF block.

Parameters:

index - The zero-based element, at which block will be inserted.

block - The GIF block to add.

addBlock

public final void addBlock(IGifBlock block)

Adds a new GIF block.

Parameters:

block - The GIF block to add.

Code example:

The following example shows how to compose an animated GIF image from individual GIF blocks.

String dir = "c:\\temp\\";

// Create a GIF image 100 x 100 px.
// The first block is fully black by default.
com.aspose.imaging.fileformats.gif.blocks.GifFrameBlock firstBlock = new com.aspose.imaging.fileformats.gif.blocks.GifFrameBlock(100, 100);
com.aspose.imaging.fileformats.gif.GifImage gifImage = new com.aspose.imaging.fileformats.gif.GifImage(firstBlock);
try {
    // The first circle is red
    com.aspose.imaging.brushes.SolidBrush brush1 = new com.aspose.imaging.brushes.SolidBrush(com.aspose.imaging.Color.getRed());

    // The second circle is black
    com.aspose.imaging.brushes.SolidBrush brush2 = new com.aspose.imaging.brushes.SolidBrush(com.aspose.imaging.Color.getBlack());

    // Gradually increase the angle of the red arc shape.
    for (int angle = 10; angle <= 360; angle += 10) {
        com.aspose.imaging.fileformats.gif.blocks.GifFrameBlock block = new com.aspose.imaging.fileformats.gif.blocks.GifFrameBlock(100, 100);

        com.aspose.imaging.Graphics gr = new com.aspose.imaging.Graphics(block);
        gr.fillPie(brush1, block.getBounds(), 0, angle);

        gifImage.addBlock(block);
    }

    // Gradually increase the angle of the black arc and wipe out the red arc.
    for (int angle = 10; angle <= 360; angle += 10) {
        com.aspose.imaging.fileformats.gif.blocks.GifFrameBlock block = new com.aspose.imaging.fileformats.gif.blocks.GifFrameBlock(100, 100);

        com.aspose.imaging.Graphics gr = new com.aspose.imaging.Graphics(block);
        gr.fillPie(brush2, block.getBounds(), 0, angle);
        gr.fillPie(brush1, block.getBounds(), angle, 360 - angle);

        gifImage.addBlock(block);
    }

    gifImage.save(dir + "animated_radar.gif");
} finally {
    firstBlock.dispose();
    gifImage.dispose();
}

removeBlock
```
public final void removeBlock(IGifBlock block)
```
Removes the GIF block.

Parameters:

block - The block to remove.
Note: do not forget to Dispose the block if you will not add it to some other GifImage.

resizeProportional
```
public final void resizeProportional(int newWidth,
                                     int newHeight,
                                     int resizeType)
```
Performs proportional resize on the image. The proportional resize will resize each frame according to the ratio of newWidth/width and newHeight/height.

Parameters:

newWidth - The new width.

newHeight - The new height.

resizeType - The resize type.

rotate
```
public void rotate(float angle,
                   boolean resizeProportionally,
                   Color backgroundColor)
```
!:RasterCahcedMultipageImage.Rotate image around the center.

Overrides:

rotate in class RasterCachedMultipageImage

Parameters:

angle - The rotate angle in degrees. Positive values will rotate clockwise.

resizeProportionally - if set to true you will have your image size changed according to rotated rectangle (corner points) projections in other case that leaves dimensions untouched and only image contents are rotated.

backgroundColor - Color of the background.

Packages

com.aspose.imaging.fileformats.gif

Interfaces

Classes

Class GifImage

Constructor Summary

Method Summary

Methods inherited from class com.aspose.imaging.RasterCachedMultipageImage

Methods inherited from class com.aspose.imaging.RasterImage

Methods inherited from class com.aspose.imaging.Image

Methods inherited from class com.aspose.imaging.DataStreamSupporter

Methods inherited from class com.aspose.imaging.DisposableObject

Methods inherited from class java.lang.Object

Constructor Detail

GifImage

GifImage

GifImage

Method Detail

getFileFormat

getXmpData

setXmpData

hasTrailer

setTrailer

isPaletteSorted

setPaletteSorted

getPaletteColorResolutionBits

setPaletteColorResolutionBits

getPageCount

getPages

getDefaultPage

getBlocks

getActiveFrame

setActiveFrame

getBackgroundColor

setBackgroundColor

getBackgroundColorIndex

setBackgroundColorIndex

getPixelAspectRatio

setPixelAspectRatio

hasTransparentColor

setTransparentColor

getTransparentColor

hasBackgroundColor

getImageOpacity

getPageExportingAction

setPageExportingAction

resize

rotateFlip

dither

crop

adjustGamma

filter

resize

adjustBrightness

adjustContrast

adjustGamma

grayscale

binarizeFixed

binarizeOtsu

binarizeBradley

orderBlocks

clearBlocks

insertBlock

addBlock

removeBlock

resizeProportional

rotate