From 9d052c650ba59ddc8132bce881bd487df31c5348 Mon Sep 17 00:00:00 2001 From: Masaya Tojo Date: Sat, 10 Aug 2024 23:08:10 +0900 Subject: Add `image-format` prefix to library name --- pnm/pbm.scm | 70 ------------------------------------------------------------- 1 file changed, 70 deletions(-) delete mode 100644 pnm/pbm.scm (limited to 'pnm/pbm.scm') diff --git a/pnm/pbm.scm b/pnm/pbm.scm deleted file mode 100644 index d580616..0000000 --- a/pnm/pbm.scm +++ /dev/null @@ -1,70 +0,0 @@ -;;; R7RS-PNM --- Library for reading and writing PNM (Portable Any Map) files for R7RS -;;; Copyright © 2024 Masaya Tojo -;;; -;;; This file is part of R7RS-PNM. -;;; -;;; R7RS-PNM 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 3 of the License, or -;;; (at your option) any later version. -;;; -;;; R7RS-PNM 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 R7RS-PNM. If not, see . - -(define-library (pnm pbm) - (export make-pbm-image - %make-pbm-image) - (import (scheme base) - (scheme case-lambda) - (pnm image) - (pnm private checker) - (pnm private bitwise)) - (begin - (define make-pbm-image - (case-lambda - ((width height) - (make-pbm-image width height #f)) - ((width height unsafe?) - (let* ((byte-width (ceiling (/ width 8))) - (byte-count (* byte-width height)) - (data (make-bytevector byte-count 0))) - (%make-pbm-image width height data unsafe?))))) - - (define (%make-pbm-image width height data unsafe?) - (let* ((byte-width (ceiling (/ width 8))) - (byte-count (* byte-width height))) - (define (xy->byte-idx+bit-idx x y) - (let-values (((byte-x bit-x) (floor/ x 8))) - (values (+ (* y byte-width) - byte-x) - bit-x))) - (define (pixel-getter x y) - (let-values (((byte-idx bit-idx) (xy->byte-idx+bit-idx x y))) - (let ((byte (bytevector-u8-ref data byte-idx))) - (bit-set? (- 7 bit-idx) byte)))) - (define (pixel-setter x y b) - (let-values (((byte-idx bit-idx) (xy->byte-idx+bit-idx x y))) - (let ((byte (bytevector-u8-ref data byte-idx))) - (bytevector-u8-set! data byte-idx - (copy-bit (- 7 bit-idx) byte b))))) - (unless (= byte-count (bytevector-length data)) - (error (string-append "(pnm pbm) make-pbm-image: Invalid bytevector length" byte-count))) - (let ((check-xy (make-xy-checker width height)) - (check-boolean-value (make-boolean-value-checker))) - (make-pnm-image 'pbm width height #t data - (if unsafe? - pixel-getter - (lambda (x y) - (check-xy x y) - (pixel-getter x y))) - (if unsafe? - pixel-setter - (lambda (x y v) - (check-xy x y) - (check-boolean-value v) - (pixel-setter x y v))))))))) -- cgit v1.2.3