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#include "mupdf/fitz.h"
#include <zlib.h>
struct fz_ps_output_context_s
{
z_stream stream;
int input_size;
unsigned char *input;
int output_size;
unsigned char *output;
};
void
fz_write_ps_file_header(fz_context *ctx, fz_output *out)
{
fz_printf(ctx, out,
"%%!PS-Adobe-3.0\n"
//"%%%%BoundingBox: 0 0 612 792\n"
//"%%%%HiResBoundingBox: 0 0 612 792\n"
"%%%%Creator: MuPDF\n"
"%%%%LanguageLevel: 2\n"
"%%%%CreationDate: D:20160318101706Z00'00'\n"
"%%%%DocumentData: Binary\n"
"%%%%Pages: (atend)\n"
"%%%%EndComments\n"
"\n"
"%%%%BeginProlog\n"
"%%%%EndProlog\n"
"\n"
"%%%%BeginSetup\n"
"%%%%EndSetup\n"
"\n"
);
}
void fz_write_ps_file_trailer(fz_context *ctx, fz_output *out, int pages)
{
fz_printf(ctx, out, "%%%%Trailer\n%%%%Pages: %d\n%%%%EOF\n", pages);
}
fz_ps_output_context *fz_write_ps_header(fz_context *ctx, fz_output *out, int w, int h, int n, int xres, int yres, int pagenum)
{
int w_points = (w * 72 + (xres>>1)) / xres;
int h_points = (h * 72 + (yres>>1)) / yres;
float sx = w/(float)w_points;
float sy = h/(float)h_points;
fz_ps_output_context *psoc;
int err;
psoc = fz_malloc_struct(ctx, fz_ps_output_context);
err = deflateInit(&psoc->stream, Z_DEFAULT_COMPRESSION);
if (err != Z_OK)
{
fz_free(ctx, psoc);
fz_throw(ctx, FZ_ERROR_GENERIC, "compression error %d", err);
}
fz_printf(ctx, out, "%%%%Page: %d %d\n", pagenum, pagenum);
fz_printf(ctx, out, "%%%%PageBoundingBox: 0 0 %d %d\n", w_points, h_points);
fz_printf(ctx, out, "%%%%BeginPageSetup\n");
fz_printf(ctx, out, "<</PageSize [%d %d]>> setpagedevice\n", w_points, h_points);
fz_printf(ctx, out, "%%%%EndPageSetup\n\n");
fz_printf(ctx, out, "/DataFile currentfile /FlateDecode filter def\n\n");
switch(n)
{
case 2:
fz_printf(ctx, out, "/DeviceGray setcolorspace\n");
break;
case 4:
fz_printf(ctx, out, "/DeviceRGB setcolorspace\n");
break;
case 5:
fz_printf(ctx, out, "/DeviceCMYK setcolorspace\n");
break;
default:
fz_throw(ctx, FZ_ERROR_GENERIC, "Unexpected colorspace for ps output");
}
fz_printf(ctx, out,
"<<\n"
"/ImageType 1\n"
"/Width %d\n"
"/Height %d\n"
"/ImageMatrix [ %f 0 0 -%f 0 %d ]\n"
"/MultipleDataSources false\n"
"/DataSource DataFile\n"
"/BitsPerComponent 8\n"
//"/Decode [0 1]\n"
"/Interpolate false\n"
">>\n"
"image\n"
, w, h, sx, sy, h);
return psoc;
}
void fz_write_ps_trailer(fz_context *ctx, fz_output *out, fz_ps_output_context *psoc)
{
if (psoc)
{
int err;
psoc->stream.next_in = NULL;
psoc->stream.avail_in = 0;
psoc->stream.next_out = (Bytef*)psoc->output;
psoc->stream.avail_out = (uInt)psoc->output_size;
err = deflate(&psoc->stream, Z_FINISH);
if (err != Z_STREAM_END)
fz_throw(ctx, FZ_ERROR_GENERIC, "compression error %d", err);
fz_write(ctx, out, psoc->output, psoc->output_size - psoc->stream.avail_out);
fz_free(ctx, psoc->input);
fz_free(ctx, psoc->output);
fz_free(ctx, psoc);
}
fz_printf(ctx, out, "\nshowpage\n%%%%PageTrailer\n%%%%EndPageTrailer\n\n");
}
void fz_write_pixmap_as_ps(fz_context *ctx, fz_output *out, const fz_pixmap *pixmap)
{
fz_ps_output_context *psoc;
fz_write_ps_file_header(ctx, out);
psoc = fz_write_ps_header(ctx, out, pixmap->w, pixmap->h, pixmap->n, pixmap->xres, pixmap->yres, 1);
fz_try(ctx)
{
fz_write_ps_band(ctx, out, psoc, pixmap->w, pixmap->h, pixmap->n, pixmap->stride, 0, 0, pixmap->samples);
}
fz_always(ctx)
{
fz_write_ps_trailer(ctx, out, psoc);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
fz_write_ps_file_trailer(ctx, out, 1);
}
void fz_save_pixmap_as_ps(fz_context *ctx, fz_pixmap *pixmap, char *filename, int append)
{
fz_output *out = fz_new_output_with_path(ctx, filename, append);
fz_try(ctx)
fz_write_pixmap_as_ps(ctx, out, pixmap);
fz_always(ctx)
fz_drop_output(ctx, out);
fz_catch(ctx)
fz_rethrow(ctx);
}
void fz_write_ps_band(fz_context *ctx, fz_output *out, fz_ps_output_context *psoc, int w, int h, int n, int stride, int band_start, int bandheight, unsigned char *samples)
{
int x, y, i, err;
int required_input;
int required_output;
unsigned char *o;
if (band_start+bandheight >= h)
bandheight = h - band_start;
required_input = w*(n-1)*bandheight;
required_output = (int)deflateBound(&psoc->stream, required_input);
if (psoc->input == NULL || psoc->input_size < required_input)
{
fz_free(ctx, psoc->input);
psoc->input = NULL;
psoc->input = fz_malloc(ctx, required_input);
psoc->input_size = required_input;
}
if (psoc->output == NULL || psoc->output_size < required_output)
{
fz_free(ctx, psoc->output);
psoc->output = NULL;
psoc->output = fz_malloc(ctx, required_output);
psoc->output_size = required_output;
}
o = psoc->input;
for (y = 0; y < bandheight; y++)
{
for (x = 0; x < w; x++)
{
for (i = n-1; i > 0; i--)
*o++ = *samples++;
samples++;
}
samples += stride - w*n;
}
psoc->stream.next_in = (Bytef*)psoc->input;
psoc->stream.avail_in = required_input;
psoc->stream.next_out = (Bytef*)psoc->output;
psoc->stream.avail_out = (uInt)psoc->output_size;
err = deflate(&psoc->stream, Z_NO_FLUSH);
if (err != Z_OK)
fz_throw(ctx, FZ_ERROR_GENERIC, "compression error %d", err);
fz_write(ctx, out, psoc->output, psoc->output_size - psoc->stream.avail_out);
}
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