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| author | Tor Andersson <tor.andersson@artifex.com> | 2016-12-21 16:19:28 +0100 |
|---|---|---|
| committer | Tor Andersson <tor.andersson@artifex.com> | 2016-12-27 15:06:51 +0100 |
| commit | 9423400441f32a4c28651ee255cb95cecf49a57a (patch) | |
| tree | 1cea74f63248ca990e92ca73ef52a87d04aed769 /include | |
| parent | bc0b5d4b39e3050c36162d719666053e520161c9 (diff) | |
| download | mupdf-9423400441f32a4c28651ee255cb95cecf49a57a.tar.xz | |
Common code to ensure we only premultiply pixmaps with additive colors.
Diffstat (limited to 'include')
| -rw-r--r-- | include/mupdf/fitz/colorspace.h | 9 | ||||
| -rw-r--r-- | include/mupdf/fitz/pixmap.h | 7 |
2 files changed, 15 insertions, 1 deletions
diff --git a/include/mupdf/fitz/colorspace.h b/include/mupdf/fitz/colorspace.h index 398503d1..8a1c5caf 100644 --- a/include/mupdf/fitz/colorspace.h +++ b/include/mupdf/fitz/colorspace.h @@ -29,6 +29,13 @@ int fz_colorspace_is_indexed(fz_context *ctx, fz_colorspace *cs); int fz_colorspace_is_lab(fz_context *ctx, fz_colorspace *cs); /* + fz_colorspace_is_subtractive: Return true if a colorspace is subtractive. + + True for CMYK, Separation and DeviceN colorspaces. +*/ +int fz_colorspace_is_subtractive(fz_context *ctx, fz_colorspace *pix); + +/* fz_device_gray: Get colorspace representing device specific gray. */ fz_colorspace *fz_device_gray(fz_context *ctx); @@ -77,7 +84,7 @@ typedef void (fz_colorspace_convert_fn)(fz_context *ctx, fz_colorspace *cs, cons typedef void (fz_colorspace_destruct_fn)(fz_context *ctx, fz_colorspace *cs); -fz_colorspace *fz_new_colorspace(fz_context *ctx, char *name, int n, fz_colorspace_convert_fn *to_rgb, fz_colorspace_convert_fn *from_rgb, fz_colorspace_destruct_fn *destruct, void *data, size_t size); +fz_colorspace *fz_new_colorspace(fz_context *ctx, char *name, int n, int is_subtractive, fz_colorspace_convert_fn *to_rgb, fz_colorspace_convert_fn *from_rgb, fz_colorspace_destruct_fn *destruct, void *data, size_t size); fz_colorspace *fz_new_indexed_colorspace(fz_context *ctx, fz_colorspace *base, int high, unsigned char *lookup); fz_colorspace *fz_keep_colorspace(fz_context *ctx, fz_colorspace *colorspace); void fz_drop_colorspace(fz_context *ctx, fz_colorspace *colorspace); diff --git a/include/mupdf/fitz/pixmap.h b/include/mupdf/fitz/pixmap.h index b2a47407..6dfd4bae 100644 --- a/include/mupdf/fitz/pixmap.h +++ b/include/mupdf/fitz/pixmap.h @@ -262,6 +262,13 @@ void fz_gamma_pixmap(fz_context *ctx, fz_pixmap *pix, float gamma); void fz_unmultiply_pixmap(fz_context *ctx, fz_pixmap *pix); /* + fz_ensure_pixmap_is_additive: Convert a pixmap in a subtractive colorspace to an additive colorspace. + + Pixmaps with premultiplied alpha must be in an additive colorspace. +*/ +fz_pixmap *fz_ensure_pixmap_is_additive(fz_context *ctx, fz_pixmap *pix); + +/* fz_convert_pixmap: Convert an existing pixmap to a desired colorspace. Other properties of the pixmap, such as resolution and position are are copied to the converted pixmap. |