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#!r6rs | |
(library (geo3x3) | |
(export encode decode) | |
(import (rnrs)) | |
(define (encode lat lng level) | |
(assert (real? lat)) | |
(assert (real? lng)) | |
(assert (integer? level)) | |
(assert (> level 0)) |
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/* * complie | |
gcc --std=c99 -Wall -g -o pdf2png pdf2png.m -framework Cocoa | |
*/ | |
#import <Cocoa/Cocoa.h> | |
static NSString* dumpPNG(CGPDFPageRef page, NSURL* outDir) { | |
size_t num = CGPDFPageGetPageNumber(page); | |
assert(num > 0); |