io.scanbot.sdk.util.bitmap

Class BitmapUtils

io.scanbot.sdk.util.bitmap.BitmapUtils

public class BitmapUtils

Contains convenient methods for Bitmaps

Field Detail

INSTANCE

public static BitmapUtils INSTANCE

Contains convenient methods for Bitmaps

Method Detail

getBitmapBounds

@JvmStatic
 @NotNull
public static android.graphics.Rect getBitmapBounds(@Nullable
                                                                         java.lang.String path)

Returns:

bounds of Bitmap from file.

isBitmapValid

@JvmStatic
public static boolean isBitmapValid(@Nullable
                                               android.graphics.Bitmap bitmap)

Returns:

true if Bitmap valid (and can be drawed). false otherwise.

getContentBounds

@JvmStatic
 @NotNull
public static android.graphics.Rect getContentBounds(@Nullable
                                                                          android.graphics.Bitmap bitmap)

Returns:

Rect with minimum bounds in which all content of Bitmap might be fit. Assuming that transparent pixels are "empty", therefore not counting them as a content. Method performs in linear time (relatively to amount of pixels), so it's not recommended to invoke it from the main thread for large images.

Throws:

NullPointerException - if Bitmap is null

compress

@JvmStatic
public static void compress(@NotNull
                                       android.graphics.Bitmap bitmap,
                                       @Nullable
                                       android.graphics.Bitmap.CompressFormat format,
                                       int quality,
                                       @Nullable
                                       java.io.File file)

Compresses Bitmap to File

createPreview

@JvmStatic
 @Nullable
public static android.graphics.Bitmap createPreview(@Nullable
                                                                          android.content.res.Resources res,
                                                                          int imageRes,
                                                                          int targetWidth,
                                                                          int targetHeight)

Create preview from large (nodpi) resource image

Parameters:

res - Resources

imageRes - image resource id

targetWidth - target width

targetHeight - target height

Returns:

Bitmap with size close to target height and width

createPreview

@JvmStatic
 @Nullable
public static android.graphics.Bitmap createPreview(@Nullable
                                                                          kotlin.Array[] image,
                                                                          int targetWidth,
                                                                          int targetHeight)

Create preview from image byte array

Parameters:

image - image byte array

targetWidth - target width

targetHeight - target height

Returns:

Bitmap with size close to target height and width

createPreview

@JvmStatic
 @Nullable
public static android.graphics.Bitmap createPreview(@Nullable
                                                                          android.graphics.Bitmap image,
                                                                          int targetWidth,
                                                                          int targetHeight)

Create preview from image byte array

Parameters:

image - image Bitmap

targetWidth - target width

targetHeight - target height

Returns:

Bitmap with size close to target height and width

calculateInSampleSize

@JvmStatic
public static int calculateInSampleSize(@NotNull
                                                   android.graphics.BitmapFactory.Options options,
                                                   int reqWidth,
                                                   int reqHeight)

Calculates best inSampleSize to fit reqWidth and reqHeight or a bit more

Parameters:

options -

reqWidth -

reqHeight -

Returns:

decodeQuietly

@JvmStatic
 @Nullable
public static android.graphics.Bitmap decodeQuietly(@Nullable
                                                                          java.lang.String path,
                                                                          @Nullable
                                                                          android.graphics.BitmapFactory.Options options)

Decodes Bitmap with minimal log output. Accepts null arguments.

Returns:

Bitmap or null if load failed.

drawableToBitmap

@JvmStatic
 @Nullable
public static android.graphics.Bitmap drawableToBitmap(@NotNull
                                                                             android.graphics.drawable.Drawable drawable)

Converts image drawable to bitmap

Parameters:

drawable -

Returns:

Bitmap image bitmap

scaleIfNeeded

@JvmStatic
 @NotNull
public static android.graphics.Bitmap scaleIfNeeded(@NotNull
                                                                         android.graphics.Bitmap image,
                                                                         int maxHeight,
                                                                         int maxWidth)

Scales bitmap with saved aspectRatio

Returns:

Bitmap scaled image bitmap