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#include <fitz.h>
fz_error *
fz_newpixmap(fz_pixmap **pixp, int x, int y, int w, int h, int n)
{
fz_pixmap *pix;
pix = *pixp = fz_malloc(sizeof(fz_pixmap));
if (!pix)
return fz_outofmem;
pix->x = x;
pix->y = y;
pix->w = w;
pix->h = h;
pix->n = n;
pix->samples = fz_malloc(pix->w * pix->h * pix->n * sizeof(fz_sample));
if (!pix->samples) {
fz_free(pix);
return fz_outofmem;
}
memset(pix->samples, 0, pix->w * pix->h * pix->n * sizeof(fz_sample));
return nil;
}
void
fz_freepixmap(fz_pixmap *pix)
{
fz_free(pix->samples);
fz_free(pix);
}
void
fz_clearpixmap(fz_pixmap *pix)
{
memset(pix->samples, 0, pix->w * pix->h * pix->n * sizeof(fz_sample));
}
fz_error *
fz_convertpixmap(fz_pixmap **dstp, fz_pixmap *src, fz_colorspace *srcs, fz_colorspace *dsts)
{
fz_error *error;
fz_pixmap *dst;
float srcv[32];
float dstv[32];
int y, x, k;
error = fz_newpixmap(&dst, src->x, src->y, src->w, src->h, dsts->n + 1);
if (error)
return error;
unsigned char *s = src->samples;
unsigned char *d = dst->samples;
printf("convert pixmap from %s to %s\n", srcs->name, dsts->name);
for (y = 0; y < src->h; y++)
{
for (x = 0; x < src->w; x++)
{
*s++ = *d++;
for (k = 0; k < src->n - 1; k++)
srcv[k] = *s++ / 255.0;
fz_convertcolor(srcs, srcv, dsts, dstv);
for (k = 0; k < dst->n - 1; k++)
*d++ = dstv[k] * 255 + 0.5;
}
}
*dstp = dst;
return nil;
}
void
fz_blendover(fz_pixmap *src, fz_pixmap *dst)
{
int x, y, k;
assert(dst->n == src->n);
assert(dst->w == src->w);
assert(dst->h == src->h);
unsigned char *s = src->samples;
unsigned char *d = dst->samples;
for (y = 0; y < dst->h; y++)
{
for (x = 0; x < dst->w; x++)
{
int sa = s[0];
int ssa = 255 - sa;
for (k = 0; k < dst->n; k++)
d[k] = s[k] + fz_mul255(d[k], ssa);
s += src->n;
d += dst->n;
}
}
}
void
fz_blendmask(fz_pixmap *dst, fz_pixmap *src, fz_pixmap *msk)
{
int x, y, k;
assert(src->n == dst->n);
assert(msk->n == 1);
unsigned char *d = dst->samples;
unsigned char *s = src->samples;
unsigned char *m = msk->samples;
for (y = 0; y < dst->h; y++)
{
for (x = 0; x < dst->w; x++)
{
for (k = 0; k < dst->n; k++)
{
*d++ = fz_mul255(*s++, *m);
}
m++;
}
}
}
void
fz_debugpixmap(fz_pixmap *pix)
{
if (pix->n == 4)
{
int x, y;
FILE *ppm = fopen("out.ppm", "w");
FILE *pgm = fopen("out.pgm", "w");
fprintf(ppm, "P6\n%d %d\n255\n", pix->w, pix->h);
fprintf(pgm, "P5\n%d %d\n255\n", pix->w, pix->h);
for (y = 0; y < pix->h; y++)
for (x = 0; x < pix->w; x++)
{
int a = pix->samples[x * pix->n + y * pix->w * pix->n + 0];
int r = pix->samples[x * pix->n + y * pix->w * pix->n + 1];
int g = pix->samples[x * pix->n + y * pix->w * pix->n + 2];
int b = pix->samples[x * pix->n + y * pix->w * pix->n + 3];
putc(a, pgm);
putc(r, ppm);
putc(g, ppm);
putc(b, ppm);
// putc(((r * a) / 255) + (255 - a), ppm);
// putc(((g * a) / 255) + (255 - a), ppm);
// putc(((b * a) / 255) + (255 - a), ppm);
}
fclose(ppm);
fclose(pgm);
}
else if (pix->n == 1)
{
FILE *pgm = fopen("out.pgm", "w");
fprintf(pgm, "P5\n%d %d\n255\n", pix->w, pix->h);
fwrite(pix->samples, 1, pix->w * pix->h, pgm);
fclose(pgm);
}
}
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