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;;================================================================================================;;

;;//// libimg.inc //// (c) mike.dld, 2007-2008, (c) diamond, 2009, (c) dunkaist, 2011-2013 ///////;;

;;================================================================================================;;

;;                                                                                                ;;

;; This file is part of Common development libraries (Libs-Dev).                                  ;;

;;                                                                                                ;;

;; Libs-Dev is free software: you can redistribute it and/or modify it under the terms of the GNU ;;

;; Lesser General Public License as published by the Free Software Foundation, either version 2.1 ;;

;; of the License, or (at your option) any later version.                                         ;;

;;                                                                                                ;;

;; Libs-Dev is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without  ;;

;; even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU  ;;

;; Lesser General Public License for more details.                                                ;;

;;                                                                                                ;;

;; You should have received a copy of the GNU Lesser General Public License along with Libs-Dev.  ;;

;; If not, see .                                                    ;;

;;                                                                                                ;;

;;================================================================================================;;

; list of format id's

LIBIMG_FORMAT_BMP	= 1

LIBIMG_FORMAT_ICO	= 2

LIBIMG_FORMAT_CUR	= 3

LIBIMG_FORMAT_GIF	= 4

LIBIMG_FORMAT_PNG	= 5

LIBIMG_FORMAT_JPEG	= 6

LIBIMG_FORMAT_TGA	= 7

LIBIMG_FORMAT_PCX	= 8

LIBIMG_FORMAT_XCF	= 9

LIBIMG_FORMAT_TIFF	= 10

LIBIMG_FORMAT_PNM	= 11

LIBIMG_FORMAT_WBMP	= 12

LIBIMG_FORMAT_XBM	= 13

LIBIMG_FORMAT_Z80	= 14

; scale type                    ; corresponding img.scale params

LIBIMG_SCALE_INTEGER	= 1     ; scale factor ; reserved 0

LIBIMG_SCALE_TILE	= 2     ; new width    ; new height

LIBIMG_SCALE_STRETCH	= 3     ; new width    ; new height

LIBIMG_SCALE_FIT_RECT	= 4     ; new width    ; new height

LIBIMG_SCALE_FIT_WIDTH	= 5     ; new width    ; new height

LIBIMG_SCALE_FIT_HEIGHT	= 6     ; new width    ; new height

LIBIMG_SCALE_FIT_MAX	= 7     ; new width    ; new height

; interpolation algorithm

LIBIMG_INTER_NONE	= 0     ; use it with LIBIMG_SCALE_INTEGER, LIBIMG_SCALE_TILE, etc

LIBIMG_INTER_BILINEAR	= 1

;LIBIMG_INTER_BICUBIC	= 2

;LIBIMG_INTER_LANCZOS	= 3

LIBIMG_INTER_DEFAULT	= LIBIMG_INTER_BILINEAR

; error codes

LIBIMG_ERROR_OUT_OF_MEMORY	= 1

LIBIMG_ERROR_FORMAT		= 2

LIBIMG_ERROR_CONDITIONS		= 3

LIBIMG_ERROR_BIT_DEPTH		= 4

LIBIMG_ERROR_ENCODER		= 5

LIBIMG_ERROR_SRC_TYPE		= 6

LIBIMG_ERROR_SCALE		= 7

LIBIMG_ERROR_INTER		= 8

LIBIMG_ERROR_NOT_INPLEMENTED	= 9

LIBIMG_ERROR_INVALID_INPUT      = 10

; encode flags (byte 0x02 of _common option)

LIBIMG_ENCODE_STRICT_SPECIFIC	= 0x01

LIBIMG_ENCODE_STRICT_BIT_DEPTH	= 0x02

LIBIMG_ENCODE_DELETE_ALPHA	= 0x08

LIBIMG_ENCODE_FLUSH_ALPHA	= 0x10

; convert flags

; TBD

struct FormatsTableEntry

  Format_id	dd ?

  Is		dd ?

  Decode	dd ?

  Encode	dd ?

  Capabilities	dd ?

ends

struct Image

  Checksum dd ? ; ((Width ROL 16) OR Height) XOR Data[0]	; ignored so far

  Width    dd ?

  Height   dd ?

  Next     dd ?

  Previous dd ?

  Type     dd ? ; one of Image.bppN

  Data     dd ?

  Palette  dd ? ; used iff Type eq Image.bpp1, Image.bpp2, Image.bpp4 or Image.bpp8i

  Extended dd ?

  Flags    dd ? ; bitfield

  Delay    dd ? ; used iff Image.IsAnimated is set in Flags

ends

; values for Image.Type

; must be consecutive to allow fast switch on Image.Type in support functions

Image.bpp8i = 1  ; indexed

Image.bpp24 = 2

Image.bpp32 = 3

Image.bpp15 = 4

Image.bpp16 = 5

Image.bpp1  = 6

Image.bpp8g = 7  ; grayscale

Image.bpp2i = 8

Image.bpp4i = 9

Image.bpp8a = 10  ; grayscale with alpha channel; application layer only!!! kernel doesn't handle this image type, libimg can only create and destroy such images

; bits in Image.Flags

Image.IsAnimated = 1

struct ImageDecodeOptions

  UsedSize        dd ? ; if >=8, the field BackgroundColor is valid, and so on

  BackgroundColor dd ? ; used for transparent images as background

ends

FLIP_VERTICAL   = 0x01

FLIP_HORIZONTAL = 0x02

FLIP_BOTH   = FLIP_VERTICAL or FLIP_HORIZONTAL

ROTATE_90_CW   = 0x01

ROTATE_180     = 0x02

ROTATE_270_CW  = 0x03

ROTATE_90_CCW  = ROTATE_270_CW

ROTATE_270_CCW = ROTATE_90_CW