diff options
Diffstat (limited to 'source/fitz/pixmap.c')
| -rw-r--r-- | source/fitz/pixmap.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/source/fitz/pixmap.c b/source/fitz/pixmap.c index 4e3f62cb..93f8fed6 100644 --- a/source/fitz/pixmap.c +++ b/source/fitz/pixmap.c @@ -26,6 +26,7 @@ fz_drop_pixmap_imp(fz_context *ctx, fz_storable *pix_) fz_drop_separations(ctx, pix->seps); if (pix->flags & FZ_PIXMAP_FLAG_FREE_SAMPLES) fz_free(ctx, pix->samples); + fz_drop_pixmap(ctx, pix->underlying); fz_free(ctx, pix); } @@ -126,6 +127,40 @@ fz_new_pixmap_with_bbox_and_data(fz_context *ctx, fz_colorspace *colorspace, con return pixmap; } +fz_pixmap *fz_new_pixmap_from_pixmap(fz_context *ctx, fz_pixmap *pixmap, const fz_irect *rect) +{ + fz_irect local_rect; + fz_pixmap *subpix; + + if (!pixmap) + return NULL; + + if (rect == NULL) + { + rect = &local_rect; + local_rect.x0 = pixmap->x; + local_rect.y0 = pixmap->y; + local_rect.x1 = pixmap->x + pixmap->w; + local_rect.y1 = pixmap->y + pixmap->h; + } + else if (rect->x0 < pixmap->x || rect->y0 < pixmap->y || rect->x1 > pixmap->x + pixmap->w || rect->y1 > pixmap->y + pixmap->h) + fz_throw(ctx, FZ_ERROR_GENERIC, "Pixmap region is not a subarea"); + + subpix = fz_malloc_struct(ctx, fz_pixmap); + *subpix = *pixmap; + subpix->x = rect->x0; + subpix->y = rect->y0; + subpix->w = rect->x1 - rect->x0; + subpix->h = rect->y1 - rect->y0; + subpix->samples += (rect->x0 - pixmap->x) + (rect->y0 - pixmap->y) * pixmap->stride; + subpix->underlying = fz_keep_pixmap(ctx, pixmap); + subpix->colorspace = fz_keep_colorspace(ctx, pixmap->colorspace); + subpix->seps = fz_keep_separations(ctx, pixmap->seps); + subpix->flags &= ~FZ_PIXMAP_FLAG_FREE_SAMPLES; + + return subpix; +} + fz_irect * fz_pixmap_bbox(fz_context *ctx, const fz_pixmap *pix, fz_irect *bbox) { |