Vcl.Imaging.pngimage

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Defines classes, functions, types, and variables that you use when adding PNG images to your VCL application.

Package	vclimg270.bpl

Classes

EPNGCannotChangeTransparent	EPNGCannotChangeTransparent is the exception raised when changing the transparency options is not possible.
EPNGCouldNotLoadResource	EPNGCouldNotLoadResource is the exception raised when a resource could not be loaded.
EPngError	EPngError is the exception raised for generic png errors.
EPNGHeaderNotPresent	EPNGHeaderNotPresent is the exception raised for an incorrect png image file.
EPNGIHDRNotFirst	EPNGIHDRNotFirst is the exception raised for an incorrect png image file.
EPNGInvalidBitDepth
EPngInvalidCRC	EPngInvalidCRC is the exception raised when the check-sum check for a png file failed.
EPNGInvalidFileHeader	EPNGInvalidFileHeader is the exception raised for an incorrect png image file.
EPngInvalidIHDR	EPNGInvalidIHDR is the exception raised for an incorrect png image file.
EPNGInvalidNewSize	EPNGInvalidNewSize is the exception raised when an invalid size is passed to the resizing method.
EPNGInvalidPalette	EPNGInvalidPalette is the exception raised for an incorrect png image file.
EPNGInvalidSpec	EPNGInvalidSpec is the exception raised for invalid png image specifications.
EPNGMissingMultipleIDAT	EPNGMissingMultipleIDAT is the exception raised for an incorrect png image file.
EPNGMissingPalette	EPNGMissingPalette is the exception raised for an incorrect png image file.
EPNGNoImageData	EPNGNoImageData is the exception raised for an incorrect png image file.
EPNGNotExists	EPNGNotExists is the exception raised when the png file is missing.
EPNGOutMemory	EPNGOutMemory is the exception raised when there is insufficient memory to process a png image.
EPNGSizeExceeds	EPNGSizeExceeds is the exception raised for an incorrect png image file.
EPngUnexpectedEnd	EPngUnexpectedEnd is the exception raised for an incorrect png image file.
EPNGUnknownColorType
EPNGUnknownCompression	EPNGUnknownCompression is the exception raised for an incorrect png image file.
EPNGUnknownCriticalChunk	EPNGUnknownCriticalChunk is the exception raised for an incorrect png image file.
EPNGUnknownInterlace	EPNGUnknownInterlace is the exception raised for an incorrect png image file.
EPNGZLIBError	EPNGZLIBError is the exception raised for an incorrect png image file.
TChunk
TChunkClass
TChunkgAMA
TChunkIDAT
TChunkIEND
TChunkIHDR
TChunkpHYs
TChunkPLTE
TChunktEXt
TChunktIME
TChunktRNS
TChunkzTXt
TPngImage	TPngImage encapsulates a PNG (Portable Network Graphics) graphic.
TPNGList
TPNGObject
TPNGPointerList

Routines

ByteSwap
RegisterChunk
update_crc

Types

pByteArray
pCardinal
pIHDRData
pPointerArray
pRGBLine
pRGBPixel
pUnitType
TByteArray
TChunkName
TCompressionLevel	TCompressionLevel enumerates the possible compression levels for a png image.
TFilter	TFilter enumerates the possible filter algorithms for a png image.
TFilters	TFilters is a set of filters that can be applied to a png image.
TIHDRData
TInterlaceMethod	TInterlaceMethod enumerates the possible interlace methods for a png image.
TMAXBITMAPINFO
TPNGTransparencyMode	TPNGTransparencyMode enumerates the possible supported transparency modes of a png image.
TPointerArray
TRGBLine
TRGBPixel
TUnitType
TZStreamRec2
Vcl_Imaging_Pngimage

Variables

ZLIBErrors

Constants

COLOR_GRAYSCALE	COLOR_GRAYSCALE: Integer = 0;
COLOR_GRAYSCALEALPHA	COLOR_GRAYSCALEALPHA: Integer = 4;
COLOR_PALETTE	COLOR_PALETTE: Integer = 3;
COLOR_RGB	COLOR_RGB: Integer = 2;
COLOR_RGBALPHA	COLOR_RGBALPHA: Integer = 6;
FILTER_AVERAGE	FILTER_AVERAGE: Integer = 3;
FILTER_NONE	FILTER_NONE: Integer = 0;
FILTER_PAETH	FILTER_PAETH: Integer = 4;
FILTER_SUB	FILTER_SUB: Integer = 1;
FILTER_UP	FILTER_UP: Integer = 2;
LibraryVersion	LibraryVersion: string = 1.564;
Z_FINISH	Z_FINISH: Integer = 4;
Z_NO_FLUSH	Z_NO_FLUSH: Integer = 0;
Z_STREAM_END	Z_STREAM_END: Integer = 1;