2.1.1.25 PixelFormat Enumeration

The PixelFormat enumeration defines pixel formats that are supported in EMF+ bitmaps.

 typedef  enum 
 {
   PixelFormatUndefined = 0x00000000,
   PixelFormat1bppIndexed = 0x00030101,
   PixelFormat4bppIndexed = 0x00030402,
   PixelFormat8bppIndexed = 0x00030803,
   PixelFormat16bppGrayScale = 0x00101004,
   PixelFormat16bppRGB555 = 0x00021005,
   PixelFormat16bppRGB565 = 0x00021006,
   PixelFormat16bppARGB1555 = 0x00061007,
   PixelFormat24bppRGB = 0x00021808,
   PixelFormat32bppRGB = 0x00022009,
   PixelFormat32bppARGB = 0x0026200A,
   PixelFormat32bppPARGB = 0x000E200B,
   PixelFormat48bppRGB = 0x0010300C,
   PixelFormat64bppARGB = 0x0034400D,
   PixelFormat64bppPARGB = 0x001A400E
 } PixelFormat;

PixelFormatUndefined:  The format is not specified.

PixelFormat1bppIndexed:  The format is monochrome, and a color palette lookup table is used.

PixelFormat4bppIndexed:  The format is 16-color, and a color palette lookup table is used.

PixelFormat8bppIndexed:  The format is 256-color, and a color palette lookup table is used.

PixelFormat16bppGrayScale:  The format is 16 bits per pixel, grayscale.

PixelFormat16bppRGB555:  The format is 16 bits per pixel; 5 bits each are used for the red, green, and blue components. The remaining bit is not used.

PixelFormat16bppRGB565:  The format is 16 bits per pixel; 5 bits are used for the red component, 6 bits for the green component, and 5 bits for the blue component.

PixelFormat16bppARGB1555:  The format is 16 bits per pixel; 1 bit is used for the alpha component, and 5 bits each are used for the red, green, and blue components.

PixelFormat24bppRGB:  The format is 24 bits per pixel; 8 bits each are used for the red, green, and blue components.

PixelFormat32bppRGB:  The format is 32 bits per pixel; 8 bits each are used for the red, green, and blue components. The remaining 8 bits are not used.

PixelFormat32bppARGB:  The format is 32 bits per pixel; 8 bits each are used for the alpha, red, green, and blue components.

PixelFormat32bppPARGB:  The format is 32 bits per pixel; 8 bits each are used for the alpha, red, green, and blue components. The red, green, and blue components are premultiplied according to the alpha component.

PixelFormat48bppRGB:  The format is 48 bits per pixel; 16 bits each are used for the red, green, and blue components.

PixelFormat64bppARGB:  The format is 64 bits per pixel; 16 bits each are used for the alpha, red, green, and blue components.

PixelFormat64bppPARGB:  The format is 64 bits per pixel; 16 bits each are used for the alpha, red, green, and blue components. The red, green, and blue components are premultiplied according to the alpha component.

Pixel formats are specified by EmfPlusBitmap objects. They are encoded as follows:

  • Bits 0-7: Enumeration of the pixel format constants, starting at zero.

  • Bits 8-15: The total number of bits per pixel.

  • Bit 16: If set, the color value is indexed into a palette.

  • Bit 17: If set, the color value is in a GDI-supported format.

  • Bit 18: If set, the color value has an alpha component.

  • Bit 19: If set, the color value has a premultiplied alpha component.

  • Bit 20: If set, extended colors, 16-bits per channel, are supported.

  • Bits 21-31: Reserved.

See section 2.1.1 for the specification of additional enumerations.

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