forked from KolibriOS/kolibrios
Ivan Baravy
741b6ad89c
new function: img.get_scaled_size git-svn-id: svn://kolibrios.org@6807 a494cfbc-eb01-0410-851d-a64ba20cac60
128 lines
5.0 KiB
HTML
128 lines
5.0 KiB
HTML
;;================================================================================================;;
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;;//// libimg.inc //// (c) mike.dld, 2007-2008, (c) diamond, 2009, (c) dunkaist, 2011-2013 ///////;;
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;;================================================================================================;;
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;; ;;
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;; This file is part of Common development libraries (Libs-Dev). ;;
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;; ;;
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;; Libs-Dev is free software: you can redistribute it and/or modify it under the terms of the GNU ;;
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;; Lesser General Public License as published by the Free Software Foundation, either version 2.1 ;;
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;; of the License, or (at your option) any later version. ;;
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;; ;;
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;; Libs-Dev is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without ;;
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;; even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ;;
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;; Lesser General Public License for more details. ;;
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;; ;;
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;; You should have received a copy of the GNU Lesser General Public License along with Libs-Dev. ;;
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;; If not, see <http://www.gnu.org/licenses/>. ;;
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;; ;;
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;;================================================================================================;;
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; list of format id's
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LIBIMG_FORMAT_BMP = 1
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LIBIMG_FORMAT_ICO = 2
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LIBIMG_FORMAT_CUR = 3
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LIBIMG_FORMAT_GIF = 4
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LIBIMG_FORMAT_PNG = 5
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LIBIMG_FORMAT_JPEG = 6
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LIBIMG_FORMAT_TGA = 7
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LIBIMG_FORMAT_PCX = 8
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LIBIMG_FORMAT_XCF = 9
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LIBIMG_FORMAT_TIFF = 10
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LIBIMG_FORMAT_PNM = 11
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LIBIMG_FORMAT_WBMP = 12
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LIBIMG_FORMAT_XBM = 13
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LIBIMG_FORMAT_Z80 = 14
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; scale type ; corresponding img.scale params
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LIBIMG_SCALE_NONE = 0 ; do not scale
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LIBIMG_SCALE_INTEGER = 1 ; scale factor ; reserved 0
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LIBIMG_SCALE_TILE = 2 ; new width ; new height
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LIBIMG_SCALE_STRETCH = 3 ; new width ; new height
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LIBIMG_SCALE_FIT_BOTH = LIBIMG_SCALE_STRETCH
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LIBIMG_SCALE_FIT_MIN = 4 ; new width ; new height
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LIBIMG_SCALE_FIT_RECT = LIBIMG_SCALE_FIT_MIN
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LIBIMG_SCALE_FIT_WIDTH = 5 ; new width ; new height
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LIBIMG_SCALE_FIT_HEIGHT = 6 ; new width ; new height
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LIBIMG_SCALE_FIT_MAX = 7 ; new width ; new height
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; interpolation algorithm
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LIBIMG_INTER_NONE = 0 ; use it with LIBIMG_SCALE_INTEGER, LIBIMG_SCALE_TILE, etc
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LIBIMG_INTER_BILINEAR = 1
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;LIBIMG_INTER_BICUBIC = 2
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;LIBIMG_INTER_LANCZOS = 3
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LIBIMG_INTER_DEFAULT = LIBIMG_INTER_BILINEAR
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; error codes
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LIBIMG_ERROR_OUT_OF_MEMORY = 1
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LIBIMG_ERROR_FORMAT = 2
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LIBIMG_ERROR_CONDITIONS = 3
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LIBIMG_ERROR_BIT_DEPTH = 4
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LIBIMG_ERROR_ENCODER = 5
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LIBIMG_ERROR_SRC_TYPE = 6
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LIBIMG_ERROR_SCALE = 7
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LIBIMG_ERROR_INTER = 8
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LIBIMG_ERROR_NOT_INPLEMENTED = 9
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LIBIMG_ERROR_INVALID_INPUT = 10
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; encode flags (byte 0x02 of _common option)
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;LIBIMG_ENCODE_STRICT_SPECIFIC = 0x01
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LIBIMG_ENCODE_STRICT_BIT_DEPTH = 0x02
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;LIBIMG_ENCODE_DELETE_ALPHA = 0x08
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;LIBIMG_ENCODE_FLUSH_ALPHA = 0x10
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; convert flags
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; none so far
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struct FormatsTableEntry
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Format_id dd ?
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Is dd ?
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Decode dd ?
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Encode dd ?
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Capabilities dd ?
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ends
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struct Image
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Checksum dd ? ; ((Width ROL 16) OR Height) XOR Data[0] ; ignored so far
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Width dd ?
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Height dd ?
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Next dd ?
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Previous dd ?
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Type dd ? ; one of Image.bppN
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Data dd ?
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Palette dd ? ; used iff Type eq Image.bpp1, Image.bpp2, Image.bpp4 or Image.bpp8i
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Extended dd ?
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Flags dd ? ; bitfield
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Delay dd ? ; used iff Image.IsAnimated is set in Flags
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ends
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; values for Image.Type
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; must be consecutive to allow fast switch on Image.Type in support functions
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Image.bpp8i = 1 ; indexed
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Image.bpp24 = 2
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Image.bpp32 = 3
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Image.bpp15 = 4
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Image.bpp16 = 5
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Image.bpp1 = 6
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Image.bpp8g = 7 ; grayscale
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Image.bpp2i = 8
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Image.bpp4i = 9
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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
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; bits in Image.Flags
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Image.IsAnimated = 1
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struct ImageDecodeOptions
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UsedSize dd ? ; if >=8, the field BackgroundColor is valid, and so on
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BackgroundColor dd ? ; used for transparent images as background
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ends
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FLIP_VERTICAL = 0x01
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FLIP_HORIZONTAL = 0x02
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FLIP_BOTH = FLIP_VERTICAL or FLIP_HORIZONTAL
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ROTATE_90_CW = 0x01
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ROTATE_180 = 0x02
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ROTATE_270_CW = 0x03
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ROTATE_90_CCW = ROTATE_270_CW
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ROTATE_270_CCW = ROTATE_90_CW
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