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81 lines
2.3 KiB
81 lines
2.3 KiB
#ifndef MUPDF_FITZ_BAND_WRITER_H
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#define MUPDF_FITZ_BAND_WRITER_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/output.h"
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/*
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fz_band_writer
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*/
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typedef struct fz_band_writer_s fz_band_writer;
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typedef void (fz_write_header_fn)(fz_context *ctx, fz_band_writer *writer, const fz_colorspace *cs);
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typedef void (fz_write_band_fn)(fz_context *ctx, fz_band_writer *writer, int stride, int band_start, int band_height, const unsigned char *samples);
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typedef void (fz_write_trailer_fn)(fz_context *ctx, fz_band_writer *writer);
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typedef void (fz_drop_band_writer_fn)(fz_context *ctx, fz_band_writer *writer);
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struct fz_band_writer_s
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{
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fz_drop_band_writer_fn *drop;
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fz_write_header_fn *header;
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fz_write_band_fn *band;
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fz_write_trailer_fn *trailer;
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fz_output *out;
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int w;
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int h;
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int n;
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int s;
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int alpha;
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int xres;
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int yres;
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int pagenum;
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int line;
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fz_separations *seps;
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};
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fz_band_writer *fz_new_band_writer_of_size(fz_context *ctx, size_t size, fz_output *out);
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#define fz_new_band_writer(C,M,O) ((M *)Memento_label(fz_new_band_writer_of_size(ctx, sizeof(M), O), #M))
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/*
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fz_write_header: Cause a band writer to write the header for
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a banded image with the given properties/dimensions etc. This
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also configures the bandwriter for the format of the data to be
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passed in future calls.
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w, h: Width and Height of the entire page.
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n: Number of components (including spots and alphas).
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alpha: Number of alpha components.
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xres, yres: X and Y resolutions in dpi.
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pagenum: Page number
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cs: Colorspace (NULL for bitmaps)
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seps: Separation details (or NULL).
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Throws exception if incompatible data format.
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*/
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void fz_write_header(fz_context *ctx, fz_band_writer *writer, int w, int h, int n, int alpha, int xres, int yres, int pagenum, const fz_colorspace *cs, fz_separations *seps);
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/*
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fz_write_band: Cause a band writer to write the next band
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of data for an image.
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stride: The byte offset from the first byte of the data
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for a pixel to the first byte of the data for the same pixel
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on the row below.
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band_height: The number of lines in this band.
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samples: Pointer to first byte of the data.
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*/
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void fz_write_band(fz_context *ctx, fz_band_writer *writer, int stride, int band_height, const unsigned char *samples);
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void fz_drop_band_writer(fz_context *ctx, fz_band_writer *writer);
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#endif
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