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#include "mupdf/fitz.h"
void
fz_write_pwg_header(fz_context *ctx, fz_output *out)
{
static const unsigned char pwgsig[4] = { 'R', 'a', 'S', '2' };
/* Sync word */
fz_write(ctx, out, pwgsig, 4);
}
static void
fz_write_pwg_page_header(fz_context *ctx, fz_output *out, const fz_pwg_options *pwg,
int xres, int yres, int w, int h, int bpp)
{
static const char zero[64] = { 0 };
int i;
/* Page Header: */
fz_write(ctx, out, pwg ? pwg->media_class : zero, 64);
fz_write(ctx, out, pwg ? pwg->media_color : zero, 64);
fz_write(ctx, out, pwg ? pwg->media_type : zero, 64);
fz_write(ctx, out, pwg ? pwg->output_type : zero, 64);
fz_write_int32be(ctx, out, pwg ? pwg->advance_distance : 0);
fz_write_int32be(ctx, out, pwg ? pwg->advance_media : 0);
fz_write_int32be(ctx, out, pwg ? pwg->collate : 0);
fz_write_int32be(ctx, out, pwg ? pwg->cut_media : 0);
fz_write_int32be(ctx, out, pwg ? pwg->duplex : 0);
fz_write_int32be(ctx, out, xres);
fz_write_int32be(ctx, out, yres);
/* CUPS format says that 284->300 are supposed to be the bbox of the
* page in points. PWG says 'Reserved'. */
for (i=284; i < 300; i += 4)
fz_write(ctx, out, zero, 4);
fz_write_int32be(ctx, out, pwg ? pwg->insert_sheet : 0);
fz_write_int32be(ctx, out, pwg ? pwg->jog : 0);
fz_write_int32be(ctx, out, pwg ? pwg->leading_edge : 0);
/* CUPS format says that 312->320 are supposed to be the margins of
* the lower left hand edge of page in points. PWG says 'Reserved'. */
for (i=312; i < 320; i += 4)
fz_write(ctx, out, zero, 4);
fz_write_int32be(ctx, out, pwg ? pwg->manual_feed : 0);
fz_write_int32be(ctx, out, pwg ? pwg->media_position : 0);
fz_write_int32be(ctx, out, pwg ? pwg->media_weight : 0);
fz_write_int32be(ctx, out, pwg ? pwg->mirror_print : 0);
fz_write_int32be(ctx, out, pwg ? pwg->negative_print : 0);
fz_write_int32be(ctx, out, pwg ? pwg->num_copies : 0);
fz_write_int32be(ctx, out, pwg ? pwg->orientation : 0);
fz_write_int32be(ctx, out, pwg ? pwg->output_face_up : 0);
fz_write_int32be(ctx, out, w * 72/ xres); /* Page size in points */
fz_write_int32be(ctx, out, h * 72/ yres);
fz_write_int32be(ctx, out, pwg ? pwg->separations : 0);
fz_write_int32be(ctx, out, pwg ? pwg->tray_switch : 0);
fz_write_int32be(ctx, out, pwg ? pwg->tumble : 0);
fz_write_int32be(ctx, out, w); /* Page image in pixels */
fz_write_int32be(ctx, out, h);
fz_write_int32be(ctx, out, pwg ? pwg->media_type_num : 0);
fz_write_int32be(ctx, out, bpp < 8 ? 1 : 8); /* Bits per color */
fz_write_int32be(ctx, out, bpp); /* Bits per pixel */
fz_write_int32be(ctx, out, (w * bpp + 7)/8); /* Bytes per line */
fz_write_int32be(ctx, out, 0); /* Chunky pixels */
switch (bpp)
{
case 1: fz_write_int32be(ctx, out, 3); /* Black */ break;
case 8: fz_write_int32be(ctx, out, 18); /* Sgray */ break;
case 24: fz_write_int32be(ctx, out, 19); /* Srgb */ break;
case 32: fz_write_int32be(ctx, out, 6); /* Cmyk */ break;
default: fz_throw(ctx, FZ_ERROR_GENERIC, "pixmap bpp must be 1, 8, 24 or 32 to write as pwg");
}
fz_write_int32be(ctx, out, pwg ? pwg->compression : 0);
fz_write_int32be(ctx, out, pwg ? pwg->row_count : 0);
fz_write_int32be(ctx, out, pwg ? pwg->row_feed : 0);
fz_write_int32be(ctx, out, pwg ? pwg->row_step : 0);
fz_write_int32be(ctx, out, bpp <= 8 ? 1 : 3); /* Num Colors */
for (i=424; i < 452; i += 4)
fz_write(ctx, out, zero, 4);
fz_write_int32be(ctx, out, 1); /* TotalPageCount */
fz_write_int32be(ctx, out, 1); /* CrossFeedTransform */
fz_write_int32be(ctx, out, 1); /* FeedTransform */
fz_write_int32be(ctx, out, 0); /* ImageBoxLeft */
fz_write_int32be(ctx, out, 0); /* ImageBoxTop */
fz_write_int32be(ctx, out, w); /* ImageBoxRight */
fz_write_int32be(ctx, out, h); /* ImageBoxBottom */
for (i=480; i < 1668; i += 4)
fz_write(ctx, out, zero, 4);
fz_write(ctx, out, pwg ? pwg->rendering_intent : zero, 64);
fz_write(ctx, out, pwg ? pwg->page_size_name : zero, 64);
}
void
fz_write_pixmap_as_pwg_page(fz_context *ctx, fz_output *out, const fz_pixmap *pixmap, const fz_pwg_options *pwg)
{
unsigned char *sp;
int y, x, sn, dn, ss;
if (!out || !pixmap)
return;
if (pixmap->n != 1 && pixmap->n != 2 && pixmap->n != 4 && pixmap->n != 5)
fz_throw(ctx, FZ_ERROR_GENERIC, "pixmap must be grayscale, rgb or cmyk to write as pwg");
sn = pixmap->n;
dn = pixmap->n;
if (dn > 1)
dn--;
fz_write_pwg_page_header(ctx, out, pwg, pixmap->xres, pixmap->yres, pixmap->w, pixmap->h, dn*8);
/* Now output the actual bitmap, using a packbits like compression */
sp = pixmap->samples;
ss = pixmap->w * sn;
y = 0;
while (y < pixmap->h)
{
int yrep;
assert(sp == pixmap->samples + y * ss);
/* Count the number of times this line is repeated */
for (yrep = 1; yrep < 256 && y+yrep < pixmap->h; yrep++)
{
if (memcmp(sp, sp + yrep * ss, ss) != 0)
break;
}
fz_write_byte(ctx, out, yrep-1);
/* Encode the line */
x = 0;
while (x < pixmap->w)
{
int d;
assert(sp == pixmap->samples + y * ss + x * sn);
/* How far do we have to look to find a repeated value? */
for (d = 1; d < 128 && x+d < pixmap->w; d++)
{
if (memcmp(sp + (d-1)*sn, sp + d*sn, sn) == 0)
break;
}
if (d == 1)
{
int xrep;
/* We immediately have a repeat (or we've hit
* the end of the line). Count the number of
* times this value is repeated. */
for (xrep = 1; xrep < 128 && x+xrep < pixmap->w; xrep++)
{
if (memcmp(sp, sp + xrep*sn, sn) != 0)
break;
}
fz_write_byte(ctx, out, xrep-1);
fz_write(ctx, out, sp, dn);
sp += sn*xrep;
x += xrep;
}
else
{
fz_write_byte(ctx, out, 257-d);
x += d;
while (d > 0)
{
fz_write(ctx, out, sp, dn);
sp += sn;
d--;
}
}
}
/* Move to the next line */
sp += ss*(yrep-1);
y += yrep;
}
}
void
fz_write_bitmap_as_pwg_page(fz_context *ctx, fz_output *out, const fz_bitmap *bitmap, const fz_pwg_options *pwg)
{
unsigned char *sp;
int y, x, ss;
int byte_width;
if (!out || !bitmap)
return;
fz_write_pwg_page_header(ctx, out, pwg, bitmap->xres, bitmap->yres, bitmap->w, bitmap->h, 1);
/* Now output the actual bitmap, using a packbits like compression */
sp = bitmap->samples;
ss = bitmap->stride;
byte_width = (bitmap->w+7)/8;
y = 0;
while (y < bitmap->h)
{
int yrep;
assert(sp == bitmap->samples + y * ss);
/* Count the number of times this line is repeated */
for (yrep = 1; yrep < 256 && y+yrep < bitmap->h; yrep++)
{
if (memcmp(sp, sp + yrep * ss, byte_width) != 0)
break;
}
fz_write_byte(ctx, out, yrep-1);
/* Encode the line */
x = 0;
while (x < byte_width)
{
int d;
assert(sp == bitmap->samples + y * ss + x);
/* How far do we have to look to find a repeated value? */
for (d = 1; d < 128 && x+d < byte_width; d++)
{
if (sp[d-1] == sp[d])
break;
}
if (d == 1)
{
int xrep;
/* We immediately have a repeat (or we've hit
* the end of the line). Count the number of
* times this value is repeated. */
for (xrep = 1; xrep < 128 && x+xrep < byte_width; xrep++)
{
if (sp[0] != sp[xrep])
break;
}
fz_write_byte(ctx, out, xrep-1);
fz_write(ctx, out, sp, 1);
sp += xrep;
x += xrep;
}
else
{
fz_write_byte(ctx, out, 257-d);
fz_write(ctx, out, sp, d);
sp += d;
x += d;
}
}
/* Move to the next line */
sp += ss*yrep - byte_width;
y += yrep;
}
}
void
fz_write_pixmap_as_pwg(fz_context *ctx, fz_output *out, const fz_pixmap *pixmap, const fz_pwg_options *pwg)
{
fz_write_pwg_header(ctx, out);
fz_write_pixmap_as_pwg_page(ctx, out, pixmap, pwg);
}
void
fz_write_bitmap_as_pwg(fz_context *ctx, fz_output *out, const fz_bitmap *bitmap, const fz_pwg_options *pwg)
{
fz_write_pwg_header(ctx, out);
fz_write_bitmap_as_pwg_page(ctx, out, bitmap, pwg);
}
void
fz_save_pixmap_as_pwg(fz_context *ctx, fz_pixmap *pixmap, char *filename, int append, const fz_pwg_options *pwg)
{
fz_output *out = fz_new_output_with_path(ctx, filename, append);
fz_try(ctx)
{
if (!append)
fz_write_pwg_header(ctx, out);
fz_write_pixmap_as_pwg_page(ctx, out, pixmap, pwg);
}
fz_always(ctx)
fz_drop_output(ctx, out);
fz_catch(ctx)
fz_rethrow(ctx);
}
void
fz_save_bitmap_as_pwg(fz_context *ctx, fz_bitmap *bitmap, char *filename, int append, const fz_pwg_options *pwg)
{
fz_output *out = fz_new_output_with_path(ctx, filename, append);
fz_try(ctx)
{
if (!append)
fz_write_pwg_header(ctx, out);
fz_write_bitmap_as_pwg_page(ctx, out, bitmap, pwg);
}
fz_always(ctx)
fz_drop_output(ctx, out);
fz_catch(ctx)
fz_rethrow(ctx);
}
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