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#include "mupdf/fitz.h"
void
fz_save_pixmap_as_psd(fz_context *ctx, fz_pixmap *pixmap, const char *filename)
{
fz_output *out = fz_new_output_with_path(ctx, filename, 0);
fz_band_writer *writer = NULL;
fz_var(writer);
fz_try(ctx)
{
writer = fz_new_psd_band_writer(ctx, out);
fz_write_header(ctx, writer, pixmap->w, pixmap->h, pixmap->n, pixmap->alpha, pixmap->xres, pixmap->yres, 0, pixmap->colorspace);
fz_write_band(ctx, writer, pixmap->stride, pixmap->h, pixmap->samples);
}
fz_always(ctx)
{
fz_drop_band_writer(ctx, writer);
fz_drop_output(ctx, out);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
}
void
fz_write_pixmap_as_psd(fz_context *ctx, fz_output *out, const fz_pixmap *pixmap)
{
fz_band_writer *writer;
if (!out)
return;
writer = fz_new_psd_band_writer(ctx, out);
fz_try(ctx)
{
fz_write_header(ctx, writer, pixmap->w, pixmap->h, pixmap->n, pixmap->alpha, pixmap->xres, pixmap->yres, 0, pixmap->colorspace);
fz_write_band(ctx, writer, pixmap->stride, pixmap->h, pixmap->samples);
}
fz_always(ctx)
{
fz_drop_band_writer(ctx, writer);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
}
typedef struct psd_band_writer_s
{
fz_band_writer super;
} psd_band_writer;
static void
psd_write_header(fz_context *ctx, fz_band_writer *writer_, const fz_colorspace *cs)
{
psd_band_writer *writer = (psd_band_writer *)(void *)writer_;
fz_output *out = writer->super.out;
int w = writer->super.w;
int h = writer->super.h;
int n = writer->super.n;
int alpha = writer->super.alpha;
static const char psdsig[12] = { '8', 'B', 'P', 'S', 0, 1, 0, 0, 0, 0, 0, 0 };
static const char ressig[4] = { '8', 'B', 'I', 'M' };
fz_buffer *buffer = fz_icc_data_from_icc_colorspace(ctx, cs);
unsigned char *data;
size_t size = fz_buffer_storage(ctx, buffer, &data);
/* File Header Section */
fz_write_data(ctx, out, psdsig, 12);
fz_write_int16_be(ctx, out, n);
fz_write_int32_be(ctx, out, h);
fz_write_int32_be(ctx, out, w);
fz_write_int16_be(ctx, out, 8); /* bits per channel */
switch (n - alpha)
{
case 0:
case 1:
fz_write_int16_be(ctx, out, 1); /* Greyscale */
break;
case 3:
fz_write_int16_be(ctx, out, 3); /* RGB */
break;
case 4:
fz_write_int16_be(ctx, out, 4); /* CMYK */
break;
default:
fz_write_int16_be(ctx, out, 7); /* Multichannel */
break;
}
/* Color Mode Data Section - empty */
fz_write_int32_be(ctx, out, 0);
/* Image Resources Section */
if (size == 0)
fz_write_int32_be(ctx, out, 0);
else
{
/* ICC Profile */
fz_write_int32_be(ctx, out, 4+2+8+size+(size&1));
/* Image Resource block */
fz_write_data(ctx, out, ressig, 4);
fz_write_int16_be(ctx, out, 0x40f); /* ICC Profile */
fz_write_data(ctx, out, "\0Profile", 8); /* Profile name (must be even!) */
fz_write_data(ctx, out, data, size); /* Actual data */
if (size & 1)
fz_write_byte(ctx, out, 0); /* Pad to even */
}
/* Layer and Mask Information Section */
fz_write_int32_be(ctx, out, 0);
/* Image Data Section */
fz_write_int16_be(ctx, out, 0); /* Raw image data */
}
static void
psd_write_band(fz_context *ctx, fz_band_writer *writer_, int stride, int band_start, int band_height, const unsigned char *sp)
{
psd_band_writer *writer = (psd_band_writer *)(void *)writer_;
fz_output *out = writer->super.out;
int y, x, k, finalband;
int w, h, n;
unsigned char buffer[256];
unsigned char *buffer_end = &buffer[sizeof(buffer)];
unsigned char *b;
int plane_inc;
int line_skip;
if (!out)
return;
w = writer->super.w;
h = writer->super.h;
n = writer->super.n;
finalband = (band_start+band_height >= h);
if (finalband)
band_height = h - band_start;
plane_inc = w * (h - band_height);
line_skip = stride - w*n;
b = buffer;
for (k = 0; k < n; k++)
{
for (y = 0; y < band_height; y++)
{
for (x = 0; x < w; x++)
{
*b++ = *sp;
sp += n;
if (b == buffer_end)
{
fz_write_data(ctx, out, buffer, sizeof(buffer));
b = buffer;
}
}
sp += line_skip;
}
sp -= stride * band_height - 1;
if (b != buffer)
{
fz_write_data(ctx, out, buffer, b - buffer);
b = buffer;
}
fz_seek_output(ctx, out, plane_inc, FZ_SEEK_CUR);
}
fz_seek_output(ctx, out, w * h * (1-n), FZ_SEEK_CUR);
}
static void
psd_write_trailer(fz_context *ctx, fz_band_writer *writer_)
{
psd_band_writer *writer = (psd_band_writer *)(void *)writer_;
fz_output *out = writer->super.out;
(void)out;
(void)writer;
}
static void
psd_drop_band_writer(fz_context *ctx, fz_band_writer *writer_)
{
psd_band_writer *writer = (psd_band_writer *)(void *)writer_;
(void)writer;
}
fz_band_writer *fz_new_psd_band_writer(fz_context *ctx, fz_output *out)
{
psd_band_writer *writer = fz_new_band_writer(ctx, psd_band_writer, out);
writer->super.header = psd_write_header;
writer->super.band = psd_write_band;
writer->super.trailer = psd_write_trailer;
writer->super.drop = psd_drop_band_writer;
return &writer->super;
}
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