bmp.datatype Reference¶

BOOPSI datatype class reference for bmp.datatype, synthesised from the AmigaOS NDK 3.2 Release 4 (Autodocs/bmp).

Class properties¶

Property	Value
Display name	bmp.datatype
Group ID	GID_PICTURE = MAKE_ID('p','i','c','t') (picture)
Superclass	picture.datatype
File format	BMP (Windows bitmap)
Methods declared	1
Parent class page	picture.datatype

Description¶

The BMP data type, a sub-class of the picture.datatype, is used to load BMP (Windows bitmap) pictures.

Methods¶

Each method is declared in the autodoc METHODS block. Method implementations are inherited from the superclass unless noted otherwise in the parent's autodoc.

Method	Purpose
OM_NEW	Create a new text object from a BMP file. The source must be a file.

See also¶

• picture.datatype

Release history (NDK 3.2 R4)¶

Excerpted from ReleaseNotes/bmp-dt-RelNotes in the NDK 3.2 R4 distribution.

------------------- AmigaOS 3.1.4(.1) project ------------------------

Changes for release 45.1 (14.8.2018):

- Fixed a race condition on library lifetime handling.

- Fixed a potential memory leak on library init.

Changes for release 45.2 (10.9.2018):

- Fixed another race condition on LibOpen.

Changes for release 45.3 (17.8.2019):

- The code overwrite image data beyond the right
  border and forgot to clean the bitmap before use.

- The code forgot to release a temporary buffer, thus
  leaked memory.

- Error codes were not properly set.

----------------------- AmigaOS 3.2 project --------------------------

Changes for release 47.1 (25.8.2019):

- This is almost a complete rewrite of the BMP datatype
  which supports now compression, bitfields, 16 to 32
  bit true color images and 1 to 8 bit palette images,
  with or without compression.

Changes for release 47.2 (1.9.2019):

- Sets now the buffer size of the input buffer to a complete
  sector (512 bytes) to avoid copying overhead at the file
  system.

Changes for release 47.3 (28.9.2019):

- The end-of-line token of compressed BMP also incremented the
  line at the beginning of the current line without a single
  valid pixel in the current line. This got fixed.

Cross-references¶

• datatypes.library Reference — DataType API, NewDTObjectA(), DisposeDTObject(), DTA_* tags
• picture.datatype Reference — superclass; full method implementations live here
• iffparse.library Reference — IFF file format primitives (FORM/LIST/PROP/CAT chunks)

Source: AmigaOS NDK 3.2 Release 4, Autodocs/bmp_dtc.doc, Include_H/datatypes/datatypes.h, ReleaseNotes/bmp-dt-RelNotes.