51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
#ifndef MUPDF_FITZ_BITMAP_H
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#define MUPDF_FITZ_BITMAP_H
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#include "mupdf/fitz/system.h"
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#include "mupdf/fitz/context.h"
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#include "mupdf/fitz/pixmap.h"
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/*
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Bitmaps have 1 bit per component. Only used for creating halftoned
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versions of contone buffers, and saving out. Samples are stored msb
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first, akin to pbms.
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*/
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typedef struct fz_bitmap_s fz_bitmap;
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fz_bitmap *fz_keep_bitmap(fz_context *ctx, fz_bitmap *bit);
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void fz_drop_bitmap(fz_context *ctx, fz_bitmap *bit);
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/*
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A halftone is a set of threshold tiles, one per component. Each
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threshold tile is a pixmap, possibly of varying sizes and phases.
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Currently, we only provide one 'default' halftone tile for operating
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on 1 component plus alpha pixmaps (where the alpha is ignored). This
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is signified by a fz_halftone pointer to NULL.
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*/
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typedef struct fz_halftone_s fz_halftone;
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fz_bitmap *fz_new_bitmap_from_pixmap(fz_context *ctx, fz_pixmap *pix, fz_halftone *ht);
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fz_bitmap *fz_new_bitmap_from_pixmap_band(fz_context *ctx, fz_pixmap *pix, fz_halftone *ht, int band_start);
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struct fz_bitmap_s
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{
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int refs;
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int w, h, stride, n;
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int xres, yres;
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unsigned char *samples;
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};
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fz_bitmap *fz_new_bitmap(fz_context *ctx, int w, int h, int n, int xres, int yres);
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void fz_bitmap_details(fz_bitmap *bitmap, int *w, int *h, int *n, int *stride);
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void fz_clear_bitmap(fz_context *ctx, fz_bitmap *bit);
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fz_halftone *fz_default_halftone(fz_context *ctx, int num_comps);
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fz_halftone *fz_keep_halftone(fz_context *ctx, fz_halftone *half);
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void fz_drop_halftone(fz_context *ctx, fz_halftone *ht);
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#endif
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