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100 lines
2.8 KiB
100 lines
2.8 KiB
#include "common.h" |
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#include "bitmap.h" |
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#include "database.h" |
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#include "sample.h" |
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#include <wand/magick_wand.h> |
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int |
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imdb_sample(imdb_rec_t * const rec, |
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const char * const source) |
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{ |
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MagickWand *wand = NULL; |
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MagickPassFail status = MagickPass; |
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ExceptionType severity = 0; |
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uint16_t w = 0, h = 0; |
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char *description = NULL; |
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size_t buf_size = 64 * sizeof(char); |
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unsigned char *buf = NULL; |
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InitializeMagick("/"); /* FIXME */ |
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wand = NewMagickWand(); |
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if (status == MagickPass) |
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status = MagickReadImage(wand, source); |
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if (status == MagickPass) |
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w = MagickGetImageWidth(wand); |
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if (status == MagickPass) |
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h = MagickGetImageHeight(wand); |
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/* 2 -> 160 : width, "cols" */ |
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/* 3 -> 160 : width, "rows" */ |
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if (status == MagickPass) |
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status = MagickSampleImage(wand, 160, 160); |
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/* TODO: color maps */ |
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/* 2 -> 256 : number of colors */ |
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/* 4 -> 0 : treedepth -> auto */ |
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/* 5 -> 0 : dither -> none */ |
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/* 6 -> 0 : measure_error -> none */ |
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if (status == MagickPass) |
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status = MagickQuantizeImage(wand, 256, GRAYColorspace, 0, 0, 0); |
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/* 2 -> 3 : radius, in pixels */ |
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/* 3 -> 2 : "for reasonable results, radius should be larger than sigma" */ |
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if (status == MagickPass) |
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status = MagickBlurImage(wand, 3, 2); |
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if (status == MagickPass) |
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status = MagickNormalizeImage(wand); |
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if (status == MagickPass) |
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status = MagickEqualizeImage(wand); |
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/* 2 -> 16 : width, "cols" */ |
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/* 3 -> 16 : width, "rows" */ |
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if (status == MagickPass) |
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status = MagickSampleImage(wand, 16, 16); |
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/* 2 -> 50%, tuned by magick number, see 'magick/image.h' */ |
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if (status == MagickPass) |
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status = MagickThresholdImage(wand, 50.0 * (MaxRGB / 100)); |
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if (status == MagickPass) |
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status = MagickSetImageType(wand, BilevelType); |
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if (status == MagickPass) |
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status = MagickSetImageFormat(wand, "MONO"); |
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if (status == MagickPass) |
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buf = MagickWriteImageBlob(wand, &buf_size); |
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#ifdef DEBUG |
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if (status == MagickPass) { |
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fprintf(stderr, "sample H: %lu\n", MagickGetImageWidth(wand)); |
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fprintf(stderr, "sample W: %lu\n", MagickGetImageWidth(wand)); |
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fprintf(stderr, "buf size: %zu\n", buf_size); |
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for (unsigned int i = 0; i < buf_size; i++) |
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fprintf(stderr, "%02X", buf[i]); |
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} |
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#endif |
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if (status == MagickPass) { |
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assert(buf_size == BITMAP_SIZE); |
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memset(rec->data, 0x0, IMDB_REC_LEN); |
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rec->data[REC_OFF_RU] = 0xFF; |
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memcpy(&rec->data[REC_OFF_IW], &w, sizeof(uint16_t)); |
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memcpy(&rec->data[REC_OFF_IH], &h, sizeof(uint16_t)); |
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memcpy(&rec->data[REC_OFF_BM], buf, BITMAP_SIZE); |
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} else { |
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description = MagickGetException(wand, &severity); |
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fprintf(stderr, "%03d %.1024s\n", severity, description); |
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} |
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DestroyMagickWand(wand); |
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DestroyMagick(); |
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return (status == MagickPass) ? 0 : -1; |
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}
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