Property: ColorDepth

(TSave2D_Png)

Specifies the color depth of a Portable Network Graphics (PNG) format file for TSave2D_Png component.

Syntax:

type

{ Defined in the pSave2D_Png unit }

TPngColorDepth = (pcdIndex_1, pcdIndex_2, pcdIndex_4, pcdIndex_8, pcdRGB_8, pcdRGBA_8);

property ColorType: TPngColorType;

Description:

Color depth, also known as bit depth, pixel format, is either the number of bits used to indicate the color of a single pixel. In a Portable Network Graphics (PNG) file, the pixels can be defined by a varying number of bits. The property specifies which color depth will be used to save a barcode symbol to a Portable Network Graphics (PNG) file. It can be one of these value (defined in the pSave2D_Png unit):

• pcdIndex_1: Uses the 1-bit per pixel (1bpp) format. It supports 2 distinct colors (for example: black and white) and stores 8 pixels per 1 byte. Each pixel is an 1-bit index into a table of up to 2 colors.
• pcdIndex_2: Uses the 2-bit per pixel (2bpp) format. It supports 4 distinct colors and stores 4 pixels per 1 byte. Each pixel value is a 2-bit index into a table of up to 4 colors.
• pcdIndex_4: Uses the 4-bit per pixel (4bpp) format. It supports 16 distinct colors and stores 2 pixels per 1 byte. Each pixel value is a 4-bit index into a table of up to 16 colors.
• pcdIndex_8: Uses the 8-bit per pixel (8bpp) format. It supports 256 distinct colors and stores 1 pixel per 1 byte. Each byte is an index into a table of up to 256 colors.
• pcdRGB_8: Uses the 24-bit per pixel (24bpp) format. It supports 16777216 distinct colors and stores 1 pixel value per 3 bytes. Each pixel value defines the red, green and blue samples of the pixel.
• pcdRGBA_8: Uses the 32-bit per pixel (32bpp) format. It supports 4294967296 distinct colors and stores 1 pixel per 4 byte. Each pixel value define the Alpha, Red, Green and Blue samples of the pixel.

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