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#include "fitz_base.h"
#include "fitz_tree.h"
#include "fitz_draw.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;
}
return fz_okay;
}
fz_error *
fz_newpixmapwithrect(fz_pixmap **pixp, fz_irect r, int n)
{
return fz_newpixmap(pixp,
r.x0, r.y0,
r.x1 - r.x0,
r.y1 - r.y0, n);
}
fz_error *
fz_newpixmapcopy(fz_pixmap **pixp, fz_pixmap *old)
{
fz_error *error;
error = fz_newpixmap(pixp, old->x, old->y, old->w, old->h, old->n);
if (error)
return error;
memcpy((*pixp)->samples, old->samples, old->w * old->h * old->n);
return fz_okay;
}
void
fz_droppixmap(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));
}
void
fz_gammapixmap(fz_pixmap *pix, float gamma)
{
unsigned char table[256];
int n = pix->w * pix->h * pix->n;
unsigned char *p = pix->samples;
int i;
for (i = 0; i < 256; i++)
table[i] = CLAMP(pow(i / 255.0, gamma) * 255.0, 0, 255);
while (n--)
{
*p = table[*p];
p++;
}
}
void
fz_debugpixmap(fz_pixmap *pix, char *prefix)
{
static int counter = 0;
char colorname[40];
char alphaname[40];
FILE *color = NULL;
FILE *alpha = NULL;
int x, y;
sprintf(alphaname, "%s-%04d-alpha.pgm", prefix, counter);
alpha = fopen(alphaname, "wb");
if (!alpha)
goto cleanup;
if (pix->n > 1)
{
if (pix->n > 2)
sprintf(colorname, "%s-%04d-color.ppm", prefix, counter);
else
sprintf(colorname, "%s-%04d-color.pgm", prefix, counter);
color = fopen(colorname, "wb");
if (!color)
goto cleanup;
}
counter ++;
if (pix->n == 5)
{
fprintf(alpha, "P5\n%d %d\n255\n", pix->w, pix->h);
fprintf(color, "P6\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 cc = pix->samples[x * pix->n + y * pix->w * pix->n + 1];
int mm = pix->samples[x * pix->n + y * pix->w * pix->n + 2];
int yy = pix->samples[x * pix->n + y * pix->w * pix->n + 3];
int kk = pix->samples[x * pix->n + y * pix->w * pix->n + 4];
int r = 255 - MIN(cc + kk, 255);
int g = 255 - MIN(mm + kk, 255);
int b = 255 - MIN(yy + kk, 255);
fputc(a, alpha);
fputc(r, color);
fputc(g, color);
fputc(b, color);
}
}
}
else if (pix->n == 4)
{
fprintf(alpha, "P5\n%d %d\n255\n", pix->w, pix->h);
fprintf(color, "P6\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];
fputc(a, alpha);
fputc(r, color);
fputc(g, color);
fputc(b, color);
}
}
}
else if (pix->n == 2)
{
fprintf(alpha, "P5\n%d %d\n255\n", pix->w, pix->h);
fprintf(color, "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 g = pix->samples[x * pix->n + y * pix->w * pix->n + 1];
fputc(a, alpha);
fputc(g, color);
}
}
}
else if (pix->n == 1)
{
fprintf(alpha, "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 g = pix->samples[x * pix->n + y * pix->w * pix->n + 0];
fputc(g, alpha);
}
}
}
cleanup:
if (alpha) fclose(alpha);
if (color) fclose(color);
}
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