diff options
Diffstat (limited to 'fitzdraw/pixmap.c')
| -rw-r--r-- | fitzdraw/pixmap.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/fitzdraw/pixmap.c b/fitzdraw/pixmap.c new file mode 100644 index 00000000..077009f8 --- /dev/null +++ b/fitzdraw/pixmap.c @@ -0,0 +1,188 @@ +#include "fitz-base.h" +#include "fitz-world.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); +} + |