Package icyllis.arc3d.core

Class ImageInfo

java.lang.Object
icyllis.arc3d.core.ImageInfo
public final class ImageInfo extends Object
Describes pixel dimensions and encoding.

ImageInfo contains dimensions, the pixel integral width and height. It encodes how pixel bits describe alpha, transparency; color components red, blue, and green.

  • Constructor Summary

    Constructors
    Constructor
    Description
    ImageInfo()
    Creates an empty ImageInfo with ColorInfo.CT_UNKNOWN, ColorInfo.AT_UNKNOWN, and a width and height of zero.
    ImageInfo(int width, int height)
    Creates ImageInfo from integral dimensions width and height, ColorInfo.CT_UNKNOWN and ColorInfo.AT_UNKNOWN.
    ImageInfo(int width, int height, int colorType, int alphaType)
    Creates ImageInfo from integral dimensions width and height, colorType and alphaType.
    ImageInfo(int w, int h, int ct, int at, ColorSpace cs)
    Creates ImageInfo from integral dimensions and ColorInfo,

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    alphaType()
    Returns alpha type.
    int
    bytesPerPixel()
    Returns number of bytes per pixel required by ColorType.
    ColorSpace
    colorSpace()
    Returns ColorSpace, the range of colors.
    int
    colorType()
    Returns color type.
    long
    computeByteSize(int rowBytes)
    Returns storage required by pixel array, given ImageInfo dimensions, ColorType, and rowBytes.
    long
    computeMinByteSize()
     
    boolean
    equals(Object o)
     
    int
    hashCode()
     
    int
    height()
    Returns pixel row count.
    boolean
    isEmpty()
    Returns if ImageInfo describes an empty area of pixels by checking if either width or height is zero or smaller.
    boolean
    isOpaque()
    Returns true if AlphaType is set to hint that all pixels are opaque; their alpha value is implicitly or explicitly 1.0.
    boolean
    isValid()
    Returns if ImageInfo describes an empty area of pixels by checking if width and height is greater than zero, and ColorInfo is valid.
    static ImageInfo
    make(int width, int height, int ct, int at, ColorSpace cs)
    Creates ImageInfo from integral dimensions width and height, ColorType ct, AlphaType at, and optionally ColorSpace cs.
    ImageInfo
    makeAlphaType(int newAlphaType)
    Creates ImageInfo with same ColorSpace, ColorType, width, and height, with AlphaType set to newAlphaType.
    ImageInfo
    makeColorSpace(ColorSpace newColorSpace)
    Creates ImageInfo with same ColorType, AlphaType, width, and height, with ColorSpace set to newColorSpace.
    ImageInfo
    makeColorType(int newColorType)
    Creates ImageInfo with same ColorSpace, AlphaType, width, and height, with ColorType set to newColorType.
    static ImageInfo
    makeUnknown(int width, int height)
    Creates ImageInfo from integral dimensions width and height, ColorInfo.CT_UNKNOWN, ColorInfo.AT_UNKNOWN, with ColorSpace set to null.
    ImageInfo
    makeWH(int newWidth, int newHeight)
    Creates ImageInfo with the same ColorType and AlphaType, with dimensions set to width and height.
    int
    minRowBytes()
    Returns minimum bytes per row, computed from pixel width() and ColorType, which specifies bytesPerPixel().
    void
    resize(int width, int height)
    Internal resize for optimization purposes.
    String
    toString()
     
    int
    width()
    Returns pixel count in each row.

    Methods inherited from class java.lang.Object

    clone, finalize, getClass, notify, notifyAll, wait, wait, wait

  • Constructor Details

    • ImageInfo

      public ImageInfo()
      Creates an empty ImageInfo with ColorInfo.CT_UNKNOWN, ColorInfo.AT_UNKNOWN, and a width and height of zero.

    • ImageInfo

      public ImageInfo(@Size(min=0L) int width, @Size(min=0L) int height)
      Creates ImageInfo from integral dimensions width and height, ColorInfo.CT_UNKNOWN and ColorInfo.AT_UNKNOWN.

      Returned ImageInfo as part of source does not draw, and as part of destination can not be drawn to.

      Parameters:
      width - pixel column count; must be zero or greater
      height - pixel row count; must be zero or greater

    • ImageInfo

      public ImageInfo(@Size(min=0L) int width, @Size(min=0L) int height, int colorType, int alphaType)
      Creates ImageInfo from integral dimensions width and height, colorType and alphaType.

      Parameters are not validated to see if their values are legal, or that the combination is supported.

      Parameters:
      width - pixel column count; must be zero or greater
      height - pixel row count; must be zero or greater

    • ImageInfo

      @Internal public ImageInfo(@Size(min=0L) int w, @Size(min=0L) int h, int ct, int at, @Nullable ColorSpace cs)
      Creates ImageInfo from integral dimensions and ColorInfo,

      Parameters are not validated to see if their values are legal, or that the combination is supported.

      Parameters:
      w - pixel column count; must be zero or greater
      h - pixel row count; must be zero or greater

  • Method Details

    • make

      @Nonnull public static ImageInfo make(@Size(min=0L) int width, @Size(min=0L) int height, int ct, int at, @Nullable ColorSpace cs)
      Creates ImageInfo from integral dimensions width and height, ColorType ct, AlphaType at, and optionally ColorSpace cs.

      If ColorSpace cs is null and ImageInfo is part of drawing source: ColorSpace defaults to sRGB, mapping into Surface ColorSpace.

      Parameters are not validated to see if their values are legal, or that the combination is supported.

      Parameters:
      width - pixel column count; must be zero or greater
      height - pixel row count; must be zero or greater
      cs - range of colors; may be null

    • makeUnknown

      @Nonnull public static ImageInfo makeUnknown(@Size(min=0L) int width, @Size(min=0L) int height)
      Creates ImageInfo from integral dimensions width and height, ColorInfo.CT_UNKNOWN, ColorInfo.AT_UNKNOWN, with ColorSpace set to null.

      Returned ImageInfo as part of source does not draw, and as part of destination can not be drawn to.

      Parameters:
      width - pixel column count; must be zero or greater
      height - pixel row count; must be zero or greater

    • resize

      @Internal public void resize(int width, int height)
      Internal resize for optimization purposes. ImageInfo should be created immutable.

    • width

      public int width()
      Returns pixel count in each row.
      Returns:
      pixel width

    • height

      public int height()
      Returns pixel row count.
      Returns:
      pixel height

    • colorType

      public int colorType()
      Returns color type.
      Returns:
      color type

    • alphaType

      public int alphaType()
      Returns alpha type.
      Returns:
      alpha type

    • colorSpace

      @Nullable public ColorSpace colorSpace()
      Returns ColorSpace, the range of colors.
      Returns:
      ColorSpace, or null

    • bytesPerPixel

      public int bytesPerPixel()
      Returns number of bytes per pixel required by ColorType. Returns zero if colorType is ColorInfo.CT_UNKNOWN.
      Returns:
      bytes in pixel, bpp

    • minRowBytes

      public int minRowBytes()
      Returns minimum bytes per row, computed from pixel width() and ColorType, which specifies bytesPerPixel(). If rowBytes is greater than IntMax then return 0.
      Returns:
      width() times bytesPerPixel() as integer

    • isEmpty

      public boolean isEmpty()
      Returns if ImageInfo describes an empty area of pixels by checking if either width or height is zero or smaller.
      Returns:
      true if either dimension is zero or smaller

    • isOpaque

      public boolean isOpaque()
      Returns true if AlphaType is set to hint that all pixels are opaque; their alpha value is implicitly or explicitly 1.0.

      Does not check if ColorType allows alpha, or if any pixel value has transparency.

      Returns:
      true if AlphaType is Opaque

    • isValid

      public boolean isValid()
      Returns if ImageInfo describes an empty area of pixels by checking if width and height is greater than zero, and ColorInfo is valid.
      Returns:
      true if both dimension and ColorInfo is valid

    • computeByteSize

      public long computeByteSize(int rowBytes)
      Returns storage required by pixel array, given ImageInfo dimensions, ColorType, and rowBytes. rowBytes is assumed to be at least as large as minRowBytes().

      Returns zero if height is zero. Returns LongMax if minRowBytes() is greater than IntMax.

      Parameters:
      rowBytes - size of pixel row or larger
      Returns:
      memory required by pixel buffer

    • computeMinByteSize

      public long computeMinByteSize()

    • makeWH

      @Nonnull public ImageInfo makeWH(int newWidth, int newHeight)
      Creates ImageInfo with the same ColorType and AlphaType, with dimensions set to width and height.
      Parameters:
      newWidth - pixel column count; must be zero or greater
      newHeight - pixel row count; must be zero or greater
      Returns:
      created ImageInfo

    • makeAlphaType

      @Nonnull public ImageInfo makeAlphaType(int newAlphaType)
      Creates ImageInfo with same ColorSpace, ColorType, width, and height, with AlphaType set to newAlphaType.
      Returns:
      created ImageInfo

    • makeColorType

      @Nonnull public ImageInfo makeColorType(int newColorType)
      Creates ImageInfo with same ColorSpace, AlphaType, width, and height, with ColorType set to newColorType.
      Returns:
      created ImageInfo

    • makeColorSpace

      @Nonnull public ImageInfo makeColorSpace(@Nullable ColorSpace newColorSpace)
      Creates ImageInfo with same ColorType, AlphaType, width, and height, with ColorSpace set to newColorSpace.
      Returns:
      created ImageInfo

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • equals

      public boolean equals(Object o)
      Overrides:
      equals in class Object

    • toString

      public String toString()
      Overrides:
      toString in class Object