diff options
| -rw-r--r-- | source/fitz/pixmap.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/source/fitz/pixmap.c b/source/fitz/pixmap.c index e456bd8f..fc754175 100644 --- a/source/fitz/pixmap.c +++ b/source/fitz/pixmap.c @@ -142,6 +142,26 @@ fz_clear_pixmap(fz_context *ctx, fz_pixmap *pix) void fz_clear_pixmap_with_value(fz_context *ctx, fz_pixmap *pix, int value) { + /* CMYK needs special handling (and potentially any other subtractive colorspaces) */ + if (pix->colorspace->n == 4) + { + value = 255 - value; + int x, y; + unsigned char *s = pix->samples; + for (y = 0; y < pix->h; y++) + { + for (x = 0; x < pix->w; x++) + { + *s++ = 0; + *s++ = 0; + *s++ = 0; + *s++ = value; + *s++ = 255; + } + } + return; + } + if (value == 255) { memset(pix->samples, 255, (unsigned int)(pix->w * pix->h * pix->n)); @@ -280,14 +300,39 @@ fz_clear_pixmap_rect_with_value(fz_context *ctx, fz_pixmap *dest, int value, con destspan = dest->w * dest->n; destp = dest->samples + (unsigned int)(destspan * (local_b.y0 - dest->y) + dest->n * (local_b.x0 - dest->x)); + + /* CMYK needs special handling (and potentially any other subtractive colorspaces) */ + if (dest->colorspace->n == 4) + { + value = 255 - value; + do + { + unsigned char *s = destp; + for (x = 0; x < w; x++) + { + *s++ = 0; + *s++ = 0; + *s++ = 0; + *s++ = value; + *s++ = 255; + } + destp += destspan; + } + while (--y); + return; + } + if (value == 255) + { do { memset(destp, 255, (unsigned int)(w * dest->n)); destp += destspan; } while (--y); + } else + { do { unsigned char *s = destp; @@ -300,6 +345,7 @@ fz_clear_pixmap_rect_with_value(fz_context *ctx, fz_pixmap *dest, int value, con destp += destspan; } while (--y); + } } void |