385 lines
9.4 KiB
C
385 lines
9.4 KiB
C
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#include "mupdf/fitz.h"
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#include <string.h>
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void
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fz_save_pixmap_as_psd(fz_context *ctx, fz_pixmap *pixmap, const char *filename)
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{
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fz_output *out = fz_new_output_with_path(ctx, filename, 0);
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fz_band_writer *writer = NULL;
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fz_var(writer);
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fz_try(ctx)
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{
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writer = fz_new_psd_band_writer(ctx, out);
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fz_write_header(ctx, writer, pixmap->w, pixmap->h, pixmap->n, pixmap->alpha, pixmap->xres, pixmap->yres, 0, pixmap->colorspace, pixmap->seps);
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fz_write_band(ctx, writer, pixmap->stride, pixmap->h, pixmap->samples);
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fz_close_output(ctx, out);
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}
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fz_always(ctx)
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{
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fz_drop_band_writer(ctx, writer);
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fz_drop_output(ctx, out);
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}
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fz_catch(ctx)
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{
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fz_rethrow(ctx);
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}
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}
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void
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fz_write_pixmap_as_psd(fz_context *ctx, fz_output *out, const fz_pixmap *pixmap)
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{
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fz_band_writer *writer;
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if (!out)
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return;
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writer = fz_new_psd_band_writer(ctx, out);
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fz_try(ctx)
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{
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fz_write_header(ctx, writer, pixmap->w, pixmap->h, pixmap->n, pixmap->alpha, pixmap->xres, pixmap->yres, 0, pixmap->colorspace, pixmap->seps);
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fz_write_band(ctx, writer, pixmap->stride, pixmap->h, pixmap->samples);
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}
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fz_always(ctx)
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{
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fz_drop_band_writer(ctx, writer);
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}
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fz_catch(ctx)
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{
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fz_rethrow(ctx);
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}
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}
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typedef struct psd_band_writer_s
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{
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fz_band_writer super;
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int num_additive;
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} psd_band_writer;
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static void
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psd_write_header(fz_context *ctx, fz_band_writer *writer_, fz_colorspace *cs)
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{
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psd_band_writer *writer = (psd_band_writer *)(void *)writer_;
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fz_output *out = writer->super.out;
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int w = writer->super.w;
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int h = writer->super.h;
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int s = writer->super.s;
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int n = writer->super.n;
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int c = n - writer->super.alpha - s;
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fz_separations *seps = writer->super.seps;
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int i;
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size_t len;
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static const char psdsig[12] = { '8', 'B', 'P', 'S', 0, 1, 0, 0, 0, 0, 0, 0 };
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static const char ressig[4] = { '8', 'B', 'I', 'M' };
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unsigned char *data;
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size_t size;
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fz_colorspace *cs_cmyk = cs;
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#if FZ_ENABLE_ICC
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size = fz_buffer_storage(ctx, cs->u.icc.buffer, &data);
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#else
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size = 0;
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data = NULL;
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#endif
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if (cs->n != 4)
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cs_cmyk = fz_device_cmyk(ctx);
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if (!fz_colorspace_is_subtractive(ctx, cs))
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writer->num_additive = cs->n;
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/* File Header Section */
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fz_write_data(ctx, out, psdsig, 12);
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fz_write_int16_be(ctx, out, n);
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fz_write_int32_be(ctx, out, h);
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fz_write_int32_be(ctx, out, w);
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fz_write_int16_be(ctx, out, 8); /* bits per channel */
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switch (c)
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{
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case 0:
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case 1:
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fz_write_int16_be(ctx, out, 1); /* Greyscale */
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break;
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case 3:
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fz_write_int16_be(ctx, out, 3); /* RGB */
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break;
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case 4:
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fz_write_int16_be(ctx, out, 4); /* CMYK */
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break;
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default:
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fz_write_int16_be(ctx, out, 7); /* Multichannel */
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break;
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}
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/* Color Mode Data Section - empty */
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fz_write_int32_be(ctx, out, 0);
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/* Image Resources Section - Spot Names, Equivalent colors, resolution, ICC Profile */
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/* Spot names */
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len = 0;
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for (i = 0; i < s; i++)
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{
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const char *name = fz_separation_name(ctx, seps, i);
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char text[32];
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size_t len2;
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if (name == NULL)
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{
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fz_snprintf(text, sizeof text, "Spot%d", i-4);
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name = text;
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}
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len2 = strlen(name);
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if (len2 > 255)
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len2 = 255;
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len += len2 + 1;
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}
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/* Write the size of all the following resources */
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fz_write_int32_be(ctx, out,
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(s ? 12 + ((len + 1)&~1) : 0) + /* Spot Names */
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(s ? 12 + (14 * s) : 0) + /* DisplayInfo */
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28 + /* Resolutions */
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(size ? (size+19)&~1 : 0)); /* ICC Profile */
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/* Spot names */
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if (s != 0)
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{
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fz_write_data(ctx, out, ressig, 4);
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fz_write_int16_be(ctx, out, 0x03EE);
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fz_write_int16_be(ctx, out, 0); /* PString */
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fz_write_int32_be(ctx, out, (len + 1)&~1);
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for (i = 0; i < s; i++) {
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size_t len2;
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const char *name = fz_separation_name(ctx, seps, i);
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char text[32];
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if (name == NULL)
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{
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fz_snprintf(text, sizeof text, "Spot%d", i-4);
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name = text;
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}
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len2 = strlen(name);
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if (len2 > 255)
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len2 = 255;
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fz_write_byte(ctx, out, len2);
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fz_write_data(ctx, out, name, len2);
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}
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if (len & 1)
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{
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fz_write_byte(ctx, out, 0);
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}
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/* DisplayInfo - Colors for each spot channel */
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fz_write_data(ctx, out, ressig, 4);
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fz_write_int16_be(ctx, out, 0x03EF);
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fz_write_int16_be(ctx, out, 0); /* PString */
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fz_write_int32_be(ctx, out, 14 * s); /* Length */
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for (i = 0; i < s; i++) {
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float cmyk[4];
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fz_separation_equivalent(ctx, seps, i, cs_cmyk, cmyk, NULL, fz_default_color_params);
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fz_write_int16_be(ctx, out, 02); /* CMYK */
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/* PhotoShop stores all component values as if they were additive. */
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fz_write_int16_be(ctx, out, 65535 * (1-cmyk[0]));/* Cyan */
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fz_write_int16_be(ctx, out, 65535 * (1-cmyk[1]));/* Magenta */
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fz_write_int16_be(ctx, out, 65535 * (1-cmyk[2]));/* Yellow */
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fz_write_int16_be(ctx, out, 65535 * (1-cmyk[3]));/* Black */
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fz_write_int16_be(ctx, out, 0); /* Opacity 0 to 100 */
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fz_write_byte(ctx, out, 2); /* Don't know */
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fz_write_byte(ctx, out, 0); /* Padding - Always Zero */
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}
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}
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/* ICC Profile - (size + 19)&~1 bytes */
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if (size != 0)
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{
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/* Image Resource block */
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fz_write_data(ctx, out, ressig, 4);
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fz_write_int16_be(ctx, out, 0x40f); /* ICC Profile */
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fz_write_data(ctx, out, "\x07Profile", 8); /* Profile name (must be even!) */
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fz_write_int32_be(ctx, out, size);
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fz_write_data(ctx, out, data, size); /* Actual data */
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if (size & 1)
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fz_write_byte(ctx, out, 0); /* Pad to even */
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}
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/* Image resolution - 28 bytes */
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fz_write_data(ctx, out, ressig, 4);
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fz_write_int16_be(ctx, out, 0x03ED);
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fz_write_int16_be(ctx, out, 0); /* PString */
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fz_write_int32_be(ctx, out, 16); /* Length */
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/* Resolution is specified as a fixed 16.16 bits */
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fz_write_int32_be(ctx, out, writer->super.xres);
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fz_write_int16_be(ctx, out, 1); /* width: 1 --> resolution is pixels per inch */
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fz_write_int16_be(ctx, out, 1); /* width: 1 --> resolution is pixels per inch */
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fz_write_int32_be(ctx, out, writer->super.yres);
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fz_write_int16_be(ctx, out, 1); /* height: 1 --> resolution is pixels per inch */
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fz_write_int16_be(ctx, out, 1); /* height: 1 --> resolution is pixels per inch */
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/* Layer and Mask Information Section */
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fz_write_int32_be(ctx, out, 0);
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/* Image Data Section */
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fz_write_int16_be(ctx, out, 0); /* Raw image data */
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}
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static void
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psd_invert_buffer(unsigned char *buffer, int size)
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{
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int k;
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for (k = 0; k < size; k++)
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buffer[k] = 255 - buffer[k];
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}
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static void
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psd_write_band(fz_context *ctx, fz_band_writer *writer_, int stride, int band_start, int band_height, const unsigned char *sp)
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{
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psd_band_writer *writer = (psd_band_writer *)(void *)writer_;
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fz_output *out = writer->super.out;
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int y, x, k, finalband;
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int w, h, n;
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unsigned char buffer[256];
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unsigned char *buffer_end = &buffer[sizeof(buffer)];
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unsigned char *b;
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int plane_inc;
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int line_skip;
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int num_additive = writer->num_additive;
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if (!out)
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return;
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w = writer->super.w;
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h = writer->super.h;
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n = writer->super.n;
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finalband = (band_start+band_height >= h);
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if (finalband)
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band_height = h - band_start;
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plane_inc = w * (h - band_height);
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line_skip = stride - w*n;
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b = buffer;
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if (writer->super.alpha)
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{
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const unsigned char *ap = &sp[n-1];
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for (k = 0; k < n-1; k++)
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{
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for (y = 0; y < band_height; y++)
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{
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for (x = 0; x < w; x++)
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{
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int a = *ap;
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ap += n;
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*b++ = a != 0 ? (*sp * 255 + 128)/a : 0;
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sp += n;
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if (b == buffer_end)
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{
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if (k >= num_additive)
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psd_invert_buffer(buffer, sizeof(buffer));
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fz_write_data(ctx, out, buffer, sizeof(buffer));
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b = buffer;
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}
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}
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sp += line_skip;
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ap += line_skip;
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}
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sp -= stride * band_height - 1;
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ap -= stride * band_height;
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if (b != buffer)
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{
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if (k >= num_additive)
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psd_invert_buffer(buffer, sizeof(buffer));
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fz_write_data(ctx, out, buffer, b - buffer);
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b = buffer;
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}
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fz_seek_output(ctx, out, plane_inc, SEEK_CUR);
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}
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for (y = 0; y < band_height; y++)
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{
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for (x = 0; x < w; x++)
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{
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*b++ = *sp;
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sp += n;
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if (b == buffer_end)
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{
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fz_write_data(ctx, out, buffer, sizeof(buffer));
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b = buffer;
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}
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}
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sp += line_skip;
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}
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if (b != buffer)
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{
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fz_write_data(ctx, out, buffer, b - buffer);
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b = buffer;
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}
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fz_seek_output(ctx, out, plane_inc, SEEK_CUR);
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}
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else
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{
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for (k = 0; k < n; k++)
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{
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for (y = 0; y < band_height; y++)
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{
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for (x = 0; x < w; x++)
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{
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*b++ = *sp;
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sp += n;
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if (b == buffer_end)
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{
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if (k >= num_additive)
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psd_invert_buffer(buffer, sizeof(buffer));
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fz_write_data(ctx, out, buffer, sizeof(buffer));
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b = buffer;
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}
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}
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sp += line_skip;
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}
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sp -= stride * band_height - 1;
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if (b != buffer)
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{
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if (k >= num_additive)
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psd_invert_buffer(buffer, sizeof(buffer));
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fz_write_data(ctx, out, buffer, b - buffer);
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b = buffer;
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}
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fz_seek_output(ctx, out, plane_inc, SEEK_CUR);
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}
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}
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fz_seek_output(ctx, out, w * (band_height - h * n), SEEK_CUR);
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}
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static void
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psd_write_trailer(fz_context *ctx, fz_band_writer *writer_)
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{
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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;
|
||
|
|
|
||
|
|
writer->num_additive = 0;
|
||
|
|
|
||
|
|
return &writer->super;
|
||
|
|
}
|