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#include "mupdf/fitz.h"
#include <zlib.h>
#include <limits.h>
#ifndef PATH_MAX
#define PATH_MAX 4096
#endif
typedef struct fz_cbz_writer_s fz_cbz_writer;
struct fz_cbz_writer_s
{
fz_document_writer super;
fz_draw_options options;
fz_pixmap *pixmap;
int count;
fz_zip_writer *zip;
};
static fz_device *
cbz_begin_page(fz_context *ctx, fz_document_writer *wri_, const fz_rect *mediabox)
{
fz_cbz_writer *wri = (fz_cbz_writer*)wri_;
return fz_new_draw_device_with_options(ctx, &wri->options, mediabox, &wri->pixmap);
}
static void
cbz_end_page(fz_context *ctx, fz_document_writer *wri_, fz_device *dev)
{
fz_cbz_writer *wri = (fz_cbz_writer*)wri_;
fz_buffer *buffer;
char name[40];
fz_try(ctx)
fz_close_device(ctx, dev);
fz_always(ctx)
fz_drop_device(ctx, dev);
fz_catch(ctx)
fz_rethrow(ctx);
wri->count += 1;
fz_snprintf(name, sizeof name, "p%04d.png", wri->count);
buffer = fz_new_buffer_from_pixmap_as_png(ctx, wri->pixmap, NULL);
fz_try(ctx)
fz_write_zip_entry(ctx, wri->zip, name, buffer, 0);
fz_always(ctx)
fz_drop_buffer(ctx, buffer);
fz_catch(ctx)
fz_rethrow(ctx);
fz_drop_pixmap(ctx, wri->pixmap);
wri->pixmap = NULL;
}
static void
cbz_close_writer(fz_context *ctx, fz_document_writer *wri_)
{
fz_cbz_writer *wri = (fz_cbz_writer*)wri_;
fz_close_zip_writer(ctx, wri->zip);
}
static void
cbz_drop_writer(fz_context *ctx, fz_document_writer *wri_)
{
fz_cbz_writer *wri = (fz_cbz_writer*)wri_;
fz_drop_zip_writer(ctx, wri->zip);
fz_drop_pixmap(ctx, wri->pixmap);
}
fz_document_writer *
fz_new_cbz_writer(fz_context *ctx, const char *path, const char *options)
{
fz_cbz_writer *wri = fz_new_derived_document_writer(ctx, fz_cbz_writer, cbz_begin_page, cbz_end_page, cbz_close_writer, cbz_drop_writer);
fz_try(ctx)
{
fz_parse_draw_options(ctx, &wri->options, options);
wri->zip = fz_new_zip_writer(ctx, path ? path : "out.cbz");
}
fz_catch(ctx)
{
fz_free(ctx, wri);
fz_rethrow(ctx);
}
return (fz_document_writer*)wri;
}
/* generic image file output writer */
typedef struct fz_pixmap_writer_s fz_pixmap_writer;
struct fz_pixmap_writer_s
{
fz_document_writer super;
fz_draw_options options;
fz_pixmap *pixmap;
void (*save)(fz_context *ctx, fz_pixmap *pix, const char *filename);
int count;
char *path;
};
static fz_device *
pixmap_begin_page(fz_context *ctx, fz_document_writer *wri_, const fz_rect *mediabox)
{
fz_pixmap_writer *wri = (fz_pixmap_writer*)wri_;
return fz_new_draw_device_with_options(ctx, &wri->options, mediabox, &wri->pixmap);
}
static void
pixmap_end_page(fz_context *ctx, fz_document_writer *wri_, fz_device *dev)
{
fz_pixmap_writer *wri = (fz_pixmap_writer*)wri_;
char path[PATH_MAX];
fz_try(ctx)
fz_close_device(ctx, dev);
fz_always(ctx)
fz_drop_device(ctx, dev);
fz_catch(ctx)
fz_rethrow(ctx);
wri->count += 1;
fz_format_output_path(ctx, path, sizeof path, wri->path, wri->count);
wri->save(ctx, wri->pixmap, path);
fz_drop_pixmap(ctx, wri->pixmap);
wri->pixmap = NULL;
}
static void
pixmap_drop_writer(fz_context *ctx, fz_document_writer *wri_)
{
fz_pixmap_writer *wri = (fz_pixmap_writer*)wri_;
fz_drop_pixmap(ctx, wri->pixmap);
fz_free(ctx, wri->path);
}
fz_document_writer *
fz_new_pixmap_writer(fz_context *ctx, const char *path, const char *options,
const char *default_path, int n,
void (*save)(fz_context *ctx, fz_pixmap *pix, const char *filename))
{
fz_pixmap_writer *wri = fz_new_derived_document_writer(ctx, fz_pixmap_writer, pixmap_begin_page, pixmap_end_page, NULL, pixmap_drop_writer);
fz_try(ctx)
{
fz_parse_draw_options(ctx, &wri->options, options);
wri->path = fz_strdup(ctx, path ? path : default_path);
wri->save = save;
switch (n)
{
case 1: wri->options.colorspace = fz_device_gray(ctx); break;
case 3: wri->options.colorspace = fz_device_rgb(ctx); break;
case 4: wri->options.colorspace = fz_device_cmyk(ctx); break;
}
}
fz_catch(ctx)
{
fz_free(ctx, wri);
fz_rethrow(ctx);
}
return (fz_document_writer*)wri;
}
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