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#include "fitz.h"
#include "muxps.h"
#include <ctype.h> /* for toupper() */
void
xps_set_color(xps_context *ctx, fz_colorspace *colorspace, float *samples)
{
int i;
ctx->colorspace = colorspace;
for (i = 0; i < colorspace->n; i++)
ctx->color[i] = samples[i + 1];
ctx->alpha = samples[0] * ctx->opacity[ctx->opacity_top];
}
static int unhex(int chr)
{
const char *hextable = "0123456789ABCDEF";
return strchr(hextable, (toupper(chr))) - hextable;
}
static int count_commas(char *s)
{
int n = 0;
while (*s)
{
if (*s == ',')
n ++;
s ++;
}
return n;
}
void
xps_parse_color(xps_context *ctx, char *base_uri, char *string,
fz_colorspace **csp, float *samples)
{
char *p;
int i, n;
char buf[1024];
char *profile;
*csp = fz_devicergb;
samples[0] = 1.0;
samples[1] = 0.0;
samples[2] = 0.0;
samples[3] = 0.0;
if (string[0] == '#')
{
if (strlen(string) == 9)
{
samples[0] = unhex(string[1]) * 16 + unhex(string[2]);
samples[1] = unhex(string[3]) * 16 + unhex(string[4]);
samples[2] = unhex(string[5]) * 16 + unhex(string[6]);
samples[3] = unhex(string[7]) * 16 + unhex(string[8]);
}
else
{
samples[0] = 255.0;
samples[1] = unhex(string[1]) * 16 + unhex(string[2]);
samples[2] = unhex(string[3]) * 16 + unhex(string[4]);
samples[3] = unhex(string[5]) * 16 + unhex(string[6]);
}
samples[0] /= 255.0;
samples[1] /= 255.0;
samples[2] /= 255.0;
samples[3] /= 255.0;
}
else if (string[0] == 's' && string[1] == 'c' && string[2] == '#')
{
if (count_commas(string) == 2)
sscanf(string, "sc#%g,%g,%g", samples + 1, samples + 2, samples + 3);
if (count_commas(string) == 3)
sscanf(string, "sc#%g,%g,%g,%g", samples, samples + 1, samples + 2, samples + 3);
}
else if (strstr(string, "ContextColor ") == string)
{
/* Crack the string for profile name and sample values */
strcpy(buf, string);
profile = strchr(buf, ' ');
if (!profile)
{
fz_warn("cannot find icc profile uri in '%s'", string);
return;
}
*profile++ = 0;
p = strchr(profile, ' ');
if (!p)
{
fz_warn("cannot find component values in '%s'", profile);
return;
}
*p++ = 0;
n = count_commas(p) + 1;
i = 0;
while (i < n)
{
samples[i++] = atof(p);
p = strchr(p, ',');
if (!p)
break;
p ++;
if (*p == ' ')
p ++;
}
while (i < n)
{
samples[i++] = 0.0;
}
*csp = xps_read_icc_colorspace(ctx, base_uri, profile);
if (!*csp)
{
/* Default fallbacks if the ICC stuff fails */
switch (n)
{
case 2: *csp = fz_devicegray; break; /* alpha + tint */
case 4: *csp = fz_devicergb; break; /* alpha + RGB */
case 5: *csp = fz_devicecmyk; break; /* alpha + CMYK */
default: *csp = fz_devicegray; break;
}
}
}
}
fz_colorspace *
xps_read_icc_colorspace(xps_context *ctx, char *base_uri, char *profilename)
{
#if 0
fz_colorspace *space;
xps_part *part;
char partname[1024];
/* Find ICC colorspace part */
xps_absolute_path(partname, base_uri, profilename, sizeof partname);
/* See if we cached the profile */
space = xps_hash_lookup(ctx->colorspace_table, partname);
if (!space)
{
part = xps_read_part(ctx, partname);
/* Problem finding profile. Don't fail, just use default */
if (!part) {
fz_warn("cannot find icc profile part: %s", partname);
return NULL;
}
/* Create the profile */
profile = gsicc_profile_new(NULL, ctx->memory, NULL, 0);
/* Set buffer */
profile->buffer = part->data;
profile->buffer_size = part->size;
/* Parse */
gsicc_init_profile_info(profile);
/* Problem with profile. Don't fail, just use the default */
if (profile->profile_handle == NULL)
{
gsicc_profile_reference(profile, -1);
fz_warn("there was a problem with the profile: %s", partname);
return NULL;
}
/* Create a new colorspace and associate with the profile */
gs_cspace_build_ICC(&space, NULL, ctx->memory);
space->cmm_icc_profile_data = profile;
/* Steal the buffer data before freeing the part */
part->data = NULL;
xps_free_part(ctx, part);
/* Add colorspace to xps color cache. */
xps_hash_insert(ctx, ctx->colorspace_table, fz_strdup(partname), space);
}
return space;
#else
return NULL;
#endif
}
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