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Copyright 2016 KolibriOS team |
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This program is free software: you can redistribute it and/or modify |
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it under the terms of the GNU Lesser General Public License as published by |
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the Free Software Foundation, either version 3 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU Lesser General Public License for more details. |
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You should have received a copy of the GNU Lesser General Public License |
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along with this program. If not, see . |
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*) |
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MODULE libimg; |
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IMPORT sys := SYSTEM, KOSAPI; |
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CONST |
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FLIP_VERTICAL *= 1; |
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FLIP_HORIZONTAL *= 2; |
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ROTATE_90_CW *= 1; |
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ROTATE_180 *= 2; |
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ROTATE_270_CW *= 3; |
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ROTATE_90_CCW *= ROTATE_270_CW; |
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ROTATE_270_CCW *= ROTATE_90_CW; |
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// scale type corresponding img_scale params |
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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_RECT *= 4; // new width ; new height |
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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_DEFAULT *= LIBIMG_INTER_BILINEAR; |
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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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// encode flags (byte 0x02 of common option) |
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LIBIMG_ENCODE_STRICT_SPECIFIC *= 01H; |
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LIBIMG_ENCODE_STRICT_BIT_DEPTH *= 02H; |
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LIBIMG_ENCODE_DELETE_ALPHA *= 08H; |
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LIBIMG_ENCODE_FLUSH_ALPHA *= 10H; |
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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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bpp8i *= 1; // indexed |
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bpp24 *= 2; |
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bpp32 *= 3; |
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bpp15 *= 4; |
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bpp16 *= 5; |
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bpp1 *= 6; |
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bpp8g *= 7; // grayscale |
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bpp2i *= 8; |
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bpp4i *= 9; |
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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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IsAnimated *= 1; |
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TYPE |
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Image* = RECORD |
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Checksum *: INTEGER; |
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Width *: INTEGER; |
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Height *: INTEGER; |
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Next *: INTEGER; |
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Previous *: INTEGER; |
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Type *: INTEGER; // one of bppN |
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Data *: INTEGER; |
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Palette *: INTEGER; // used iff Type eq bpp1, bpp2, bpp4 or bpp8i |
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Extended *: INTEGER; |
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Flags *: INTEGER; // bitfield |
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Delay *: INTEGER // used iff IsAnimated is set in Flags |
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END; |
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ImageDecodeOptions* = RECORD |
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UsedSize *: INTEGER; // if >=8, the field BackgroundColor is valid, and so on |
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BackgroundColor *: INTEGER // used for transparent images as background |
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END; |
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FormatsTableEntry* = RECORD |
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Format_id *: INTEGER; |
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Is *: INTEGER; |
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Decode *: INTEGER; |
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Encode *: INTEGER; |
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Capabilities *: INTEGER |
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END; |
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VAR |
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img_is_img *: PROCEDURE (data, length: INTEGER): INTEGER; |
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img_to_rgb2 *: PROCEDURE (img: INTEGER; out: INTEGER); |
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(* |
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;;------------------------------------------------------------------------------------------------;; |
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;? decodes image data into RGB triplets and stores them where out points to ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;> img = pointer to source image ;; |
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;> out = where to store RGB triplets ;; |
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;;================================================================================================;; |
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*) |
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img_to_rgb *: PROCEDURE (img: INTEGER): INTEGER; |
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(* |
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;;------------------------------------------------------------------------------------------------;; |
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;? decodes image data into RGB triplets and returns pointer to memory area containing them ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;> img = pointer to source image ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;< 0 / pointer to rgb_data (array of [rgb] triplets) ;; |
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;;================================================================================================;; |
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*) |
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img_decode *: PROCEDURE (data, length, options: INTEGER): INTEGER; |
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(* |
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;;------------------------------------------------------------------------------------------------;; |
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;? decodes loaded into memory graphic file ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;> data = pointer to file in memory ;; |
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;> length = size in bytes of memory area pointed to by data ;; |
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;> options = 0 / pointer to the structure of additional options ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;< 0 / pointer to image ;; |
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;;================================================================================================;; |
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*) |
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img_encode *: PROCEDURE (img: INTEGER; common, specific: INTEGER): INTEGER; |
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(* |
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;;------------------------------------------------------------------------------------------------;; |
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;? encode image to some format ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;> img = pointer to input image ;; |
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;> common = some most important options ;; |
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; 0x00 : byte : format id ;; |
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; 0x01 : byte : fast encoding (0) / best compression ratio (255) ;; |
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; 0 : store uncompressed data (if supported both by the format and libimg) ;; |
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; 1 - 255 : use compression, if supported ;; |
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; this option may be ignored if any format specific options are defined ;; |
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; i.e. the 0 here will be ignored if some compression algorithm is specified ;; |
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; 0x02 : byte : flags (bitfield) ;; |
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; 0x01 : return an error if format specific conditions cannot be met ;; |
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; 0x02 : preserve current bit depth. means 8bpp/16bpp/24bpp and so on ;; |
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; 0x04 : delete alpha channel, if any ;; |
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; 0x08 : flush alpha channel with 0xff, if any; add it if none ;; |
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; 0x03 : byte : reserved, must be 0 ;; |
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;> specific = 0 / pointer to the structure of format specific options ;; |
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; see .inc for description ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;< 0 / pointer to encoded data ;; |
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;;================================================================================================;; |
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*) |
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img_create *: PROCEDURE (width, height, type: INTEGER): INTEGER; |
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(* |
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;;------------------------------------------------------------------------------------------------;; |
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;? creates an Image structure and initializes some its fields ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;> width = width of an image in pixels ;; |
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;> height = height of an image in pixels ;; |
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;> type = one of the bppN constants ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;< 0 / pointer to image ;; |
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;;================================================================================================;; |
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*) |
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img_destroy *: PROCEDURE (img: INTEGER): BOOLEAN; |
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(* |
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;;------------------------------------------------------------------------------------------------;; |
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;? frees memory occupied by an image and all the memory regions its fields point to ;; |
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;? follows Previous/Next pointers and deletes all the images in sequence ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;> img = pointer to image ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;< FALSE (fail) / TRUE (success) ;; |
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;;================================================================================================;; |
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*) |
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img_destroy_layer *: PROCEDURE (img: INTEGER): BOOLEAN; |
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(* |
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;;------------------------------------------------------------------------------------------------;; |
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;? frees memory occupied by an image and all the memory regions its fields point to ;; |
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;? for image sequences deletes only one frame and fixes Previous/Next pointers ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;> img = pointer to image ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;< FALSE (fail) / TRUE (success) ;; |
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;;================================================================================================;; |
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*) |
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img_count *: PROCEDURE (img: INTEGER): INTEGER; |
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(* |
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;;------------------------------------------------------------------------------------------------;; |
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;? Get number of images in the list (e.g. in animated GIF file) ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;> img = pointer to image ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;< -1 (fail) / >0 (ok) ;; |
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;;================================================================================================;; |
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*) |
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img_flip *: PROCEDURE (img: INTEGER; flip_kind: INTEGER): BOOLEAN; |
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(* |
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;;------------------------------------------------------------------------------------------------;; |
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;? Flip all layers of image ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;> img = pointer to image ;; |
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;> flip_kind = one of FLIP_* constants ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;< FALSE / TRUE ;; |
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;;================================================================================================;; |
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*) |
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img_flip_layer *: PROCEDURE (img: INTEGER; flip_kind: INTEGER): BOOLEAN; |
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(* |
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;;------------------------------------------------------------------------------------------------;; |
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;? Flip image layer ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;> img = pointer to image ;; |
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;> flip_kind = one of FLIP_* constants ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;< FALSE / TRUE ;; |
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;;================================================================================================;; |
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*) |
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img_rotate *: PROCEDURE (img: INTEGER; rotate_kind: INTEGER): BOOLEAN; |
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(* |
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;;------------------------------------------------------------------------------------------------;; |
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;? Rotate all layers of image ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;> img = pointer to image ;; |
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;> rotate_kind = one of ROTATE_* constants ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;< FALSE / TRUE ;; |
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;;================================================================================================;; |
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*) |
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img_rotate_layer *: PROCEDURE (img: INTEGER; rotate_kind: INTEGER): BOOLEAN; |
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(* |
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;;------------------------------------------------------------------------------------------------;; |
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;? Rotate image layer ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;> img = pointer to image ;; |
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;> rotate_kind = one of ROTATE_* constants ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;< FALSE / TRUE ;; |
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;;================================================================================================;; |
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*) |
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img_draw *: PROCEDURE (img: INTEGER; x, y, width, height, xpos, ypos: INTEGER); |
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(* |
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;;------------------------------------------------------------------------------------------------;; |
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;? Draw image in the window ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;> img = pointer to image ;; |
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;> x = x-coordinate in the window ;; |
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;> y = y-coordinate in the window ;; |
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;> width = maximum width to draw ;; |
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;> height = maximum height to draw ;; |
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;> xpos = offset in image by x-axis ;; |
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;> ypos = offset in image by y-axis ;; |
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;;================================================================================================;; |
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*) |
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img_scale *: PROCEDURE (src: INTEGER; crop_x, crop_y, crop_width, crop_height: INTEGER; dst: INTEGER; scale, inter, param1, param2: INTEGER ): INTEGER; |
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(* |
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;;------------------------------------------------------------------------------------------------;; |
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;? scale _image ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;> src = pointer to source image ;; |
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;> crop_x = left coord of cropping rect ;; |
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;> crop_y = top coord of cropping rect ;; |
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;> crop_width = width of cropping rect ;; |
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;> crop_height = height of cropping rect ;; |
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;> dst = pointer to resulting image / 0 ;; |
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;> scale = how to change width and height. see libimg.inc ;; |
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;> inter = interpolation algorithm ;; |
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;> param1 = see libimg.inc ;; |
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;> param2 = see libimg.inc ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;< 0 / pointer to scaled image ;; |
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;;================================================================================================;; |
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*) |
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img_convert *: PROCEDURE (src, dst: INTEGER; dst_type, flags, param: INTEGER); |
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(* |
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;;------------------------------------------------------------------------------------------------;; |
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;? scale _image ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;> src = pointer to source image ;; |
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;> flags = see libimg.inc ;; |
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;> dst_type = the Image.Type of converted image ;; |
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;> dst = pointer to destination image, if any ;; |
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;;------------------------------------------------------------------------------------------------;; |
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;< 0 / pointer to converted image ;; |
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;;================================================================================================;; |
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*) |
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img_formats_table *: ARRAY 20 OF FormatsTableEntry; |
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PROCEDURE GetImageStruct* (img: INTEGER; VAR ImageStruct: Image): BOOLEAN; |
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BEGIN |
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IF img # 0 THEN |
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sys.MOVE(img, sys.ADR(ImageStruct), sys.SIZE(Image)) |
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END |
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RETURN img # 0 |
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END GetImageStruct; |
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PROCEDURE GetFormatsTable(ptr: INTEGER); |
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VAR i: INTEGER; eot: BOOLEAN; |
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BEGIN |
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i := 0; |
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REPEAT |
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sys.MOVE(ptr, sys.ADR(img_formats_table[i]), sys.SIZE(FormatsTableEntry)); |
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ptr := ptr + sys.SIZE(FormatsTableEntry); |
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eot := img_formats_table[i].Format_id = 0; |
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INC(i) |
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UNTIL eot OR (i = LEN(img_formats_table)) |
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END GetFormatsTable; |
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PROCEDURE main; |
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VAR Lib, formats_table_ptr: INTEGER; |
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PROCEDURE GetProc(v: INTEGER; name: ARRAY OF CHAR); |
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VAR a: INTEGER; |
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BEGIN |
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a := KOSAPI.GetProcAdr(name, Lib); |
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ASSERT(a # 0); |
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sys.PUT(v, a) |
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END GetProc; |
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BEGIN |
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410 |
Lib := KOSAPI.LoadLib("/rd/1/lib/libimg.obj"); |
|
|
411 |
ASSERT(Lib # 0); |
|
|
412 |
GetProc(sys.ADR(img_is_img) , "img_is_img"); |
|
|
413 |
GetProc(sys.ADR(img_to_rgb) , "img_to_rgb"); |
|
|
414 |
GetProc(sys.ADR(img_to_rgb2) , "img_to_rgb2"); |
|
|
415 |
GetProc(sys.ADR(img_decode) , "img_decode"); |
|
|
416 |
GetProc(sys.ADR(img_encode) , "img_encode"); |
|
|
417 |
GetProc(sys.ADR(img_create) , "img_create"); |
|
|
418 |
GetProc(sys.ADR(img_destroy) , "img_destroy"); |
|
|
419 |
GetProc(sys.ADR(img_destroy_layer) , "img_destroy_layer"); |
|
|
420 |
GetProc(sys.ADR(img_count) , "img_count"); |
|
|
421 |
GetProc(sys.ADR(img_flip) , "img_flip"); |
|
|
422 |
GetProc(sys.ADR(img_flip_layer) , "img_flip_layer"); |
|
|
423 |
GetProc(sys.ADR(img_rotate) , "img_rotate"); |
|
|
424 |
GetProc(sys.ADR(img_rotate_layer) , "img_rotate_layer"); |
|
|
425 |
GetProc(sys.ADR(img_draw) , "img_draw"); |
|
|
426 |
GetProc(sys.ADR(img_scale) , "img_scale"); |
|
|
427 |
GetProc(sys.ADR(img_convert) , "img_convert"); |
|
|
428 |
GetProc(sys.ADR(formats_table_ptr) , "img_formats_table"); |
|
|
429 |
GetFormatsTable(formats_table_ptr) |
|
|
430 |
END main; |
|
|
431 |
|
|
|
432 |
|
|
|
433 |
BEGIN |
|
|
434 |
main |
|
|
435 |
END libimg. |