BGRABitmap

Unit BGRALzpCommon

Description
Uses
Classes, Interfaces, Objects and Records
Functions and Procedures
Types
Constants
Variables

Description

Type and structure definitions for LazPaint image format

Uses

Overview

Classes, Interfaces, Objects and Records

Name Description
Packed Record TLazPaintImageHeader Format of header for LazPaint files

Functions and Procedures

function DecodeLazRLE(ASource: TStream; var destBuffer; availableOutputSize: PtrInt; availableInputSize: int64 = -1): PtrInt;
procedure EncodeLazRLE(var sourceBuffer; size:PtrInt; ADest: TStream);
procedure LazPaintImageHeader_SwapEndianIfNeeded(AHeader: TLazPaintImageHeader);

Types

TLzpCompression = (...);

Constants

LazpaintChannelBlueFromGreen = 4;
LazpaintChannelBlueFromRed = 2;
LazpaintChannelGreenFromRed = 1;
LazpaintChannelNoAlpha = 8;
LazpaintPalettedRGB = 16;
LazPaintThumbMaxHeight = 128;
LazPaintThumbMaxWidth = 128;
LAZPAINT_COMPRESSION_MASK = 255;
LAZPAINT_COMPRESSION_MODE_RLE = 2;
LAZPAINT_COMPRESSION_MODE_ZSTREAM = 1;
LAZPAINT_MAGIC_HEADER : array[0..7] of char = 'LazPaint';
LAZPAINT_THUMBNAIL_PNG = 256;

Description

Functions and Procedures

function DecodeLazRLE(ASource: TStream; var destBuffer; availableOutputSize: PtrInt; availableInputSize: int64 = -1): PtrInt;

This item has no description.

procedure EncodeLazRLE(var sourceBuffer; size:PtrInt; ADest: TStream);

routines to compress and uncompress byte-sized values (you need to separate the channels to obtain any compression)

procedure LazPaintImageHeader_SwapEndianIfNeeded(AHeader: TLazPaintImageHeader);

This item has no description.

Types

TLzpCompression = (...);

This item has no description.

Values
  • lzpZStream
  • lzpRLE: slower and not necessarily better

Constants

LazpaintChannelBlueFromGreen = 4;

This item has no description.

LazpaintChannelBlueFromRed = 2;

This item has no description.

LazpaintChannelGreenFromRed = 1;

This item has no description.

LazpaintChannelNoAlpha = 8;

This item has no description.

LazpaintPalettedRGB = 16;

This item has no description.

LazPaintThumbMaxHeight = 128;

This item has no description.

LazPaintThumbMaxWidth = 128;

This item has no description.

LAZPAINT_COMPRESSION_MASK = 255;

This item has no description.

LAZPAINT_COMPRESSION_MODE_RLE = 2;

This item has no description.

LAZPAINT_COMPRESSION_MODE_ZSTREAM = 1;

This item has no description.

LAZPAINT_MAGIC_HEADER : array[0..7] of char = 'LazPaint';

This item has no description.

LAZPAINT_THUMBNAIL_PNG = 256;

This item has no description.