aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorMattias Andrée <maandree@member.fsf.org>2016-01-07 17:45:10 +0100
committerMattias Andrée <maandree@member.fsf.org>2016-01-07 17:47:17 +0100
commit1b21a57b1de96235b03c90dc891747a65b4c7946 (patch)
tree070bab0dd34dc8fc88e137d87bbea85392fcf34e
parentlibclut_gamma (diff)
downloadlibclut-1b21a57b1de96235b03c90dc891747a65b4c7946.tar.gz
libclut-1b21a57b1de96235b03c90dc891747a65b4c7946.tar.bz2
libclut-1b21a57b1de96235b03c90dc891747a65b4c7946.tar.xz
libclut_negative + libclut_rgb_invert + libclut_cie_invert
Signed-off-by: Mattias Andrée <maandree@member.fsf.org>
-rw-r--r--src/libclut.h137
1 files changed, 137 insertions, 0 deletions
diff --git a/src/libclut.h b/src/libclut.h
index 2024a14..882bf12 100644
--- a/src/libclut.h
+++ b/src/libclut.h
@@ -337,6 +337,143 @@
while (0)
+/**
+ * Reverse the colour curves (negative image with gamma preservation.)
+ *
+ * None of the parameter may have side-effects.
+ *
+ * @param ramp Pointer to the gamma ramps, must have the arrays
+ * `red`, `green`, and `blue`, and the scalars
+ * `red_size`, `green_size`, and `blue_size`. Ramp
+ * structures from libgamma can be used.
+ * @param max The maximum value on each stop in the ramps.
+ * @param type The data type used for each stop in the ramps.
+ * @param r Whether to invert the red colour curve.
+ * @param g Whether to invert the green colour curve.
+ * @param b Whether to invert the blue colour curve.
+ */
+#define libclut_negative(ramp, max, type, r, g, b)
+ do
+ {
+ size_t i__, n__;
+ type t__;
+ if (r)
+ for (i__ = 0, n__ = (ramp)->red_size; i__ < (n__ >> 1); i__)
+ {
+ t__ = (ramp)->red[i__];
+ (ramp)->red[i__] = (ramp)->red[n__ - i__ - 1];
+ (ramp)->red[n__ - i__ - 1] = t__;
+ }
+ if (g)
+ for (i__ = 0, n__ = (ramp)->green_size; i__ < (n__ >> 1); i__)
+ {
+ t__ = (ramp)->green[i__];
+ (ramp)->green[i__] = (ramp)->green[n__ - i__ - 1];
+ (ramp)->green[n__ - i__ - 1] = t__;
+ }
+ if (b)
+ for (i__ = 0, n__ = (ramp)->blue_size; i__ < (n__ >> 1); i__)
+ {
+ t__ = (ramp)->blue[i__];
+ (ramp)->blue[i__] = (ramp)->blue[n__ - i__ - 1];
+ (ramp)->blue[n__ - i__ - 1] = t__;
+ }
+ }
+ while (0)
+
+
+/**
+ * Invert the colour curves (negative image with gamma invertion), using sRGB.
+ *
+ * None of the parameter may have side-effects.
+ *
+ * @param ramp Pointer to the gamma ramps, must have the arrays
+ * `red`, `green`, and `blue`, and the scalars
+ * `red_size`, `green_size`, and `blue_size`. Ramp
+ * structures from libgamma can be used.
+ * @param max The maximum value on each stop in the ramps.
+ * @param type The data type used for each stop in the ramps.
+ * @param r Whether to invert the red colour curve.
+ * @param g Whether to invert the green colour curve.
+ * @param b Whether to invert the blue colour curve.
+ */
+#define libclut_rgb_invert(ramp, max, type, r, g, b) \
+ do \
+ { \
+ if (r) libclut__(ramp, red, type, (max) - LIBCLUT_VALUE); \
+ if (g) libclut__(ramp, green, type, (max) - LIBCLUT_VALUE); \
+ if (b) libclut__(ramp, blue, type, (max) - LIBCLUT_VALUE); \
+ } \
+ while (0)
+
+
+/**
+ * Invert the colour curves (negative image with gamma invertion), using CIE xyY.
+ *
+ * None of the parameter may have side-effects.
+ *
+ * @param ramp Pointer to the gamma ramps, must have the arrays
+ * `red`, `green`, and `blue`, and the scalars
+ * `red_size`, `green_size`, and `blue_size`. Ramp
+ * structures from libgamma can be used.
+ * @param max The maximum value on each stop in the ramps.
+ * @param type The data type used for each stop in the ramps.
+ * @param r Whether to invert the red colour curve.
+ * @param g Whether to invert the green colour curve.
+ * @param b Whether to invert the blue colour curve.
+ */
+#define libclut_cie_invert(ramp, max, type, r, g, b) \
+ do \
+ { \
+ size_t rn__ = (ramp)->red_size; \
+ size_t gn__ = (ramp)->green_size; \
+ size_t bn__ = (ramp)->blue_size; \
+ size_t i__; \
+ double x__, y__, Y__, r__, g__, b__; \
+ type* rs__ = (ramp)->red; \
+ type* gs__ = (ramp)->green; \
+ type* bs__ = (ramp)->blue; \
+ if (r && g && b && (rn__ == gn__) && (gn__ == bn__)) \
+ { \
+ for (i__ = 0; i__ < rn__; i__) \
+ { \
+ libclut_model_srgb_to_ciexyy(rs__[i__] / ((double)(max)), gs__[i__] / ((double)(max)), \
+ bs__[i__] / ((double)(max)), &x__, &y__, &Y__); \
+ libclut_model_ciexyy_to_srgb(x__, y__, 1.0 - Y__, &r__, &g__, &b__); \
+ rs__[i__] = (type)(r__ * (double)(max)); \
+ gs__[i__] = (type)(g__ * (double)(max)); \
+ bs__[i__] = (type)(b__ * (double)(max)); \
+ } \
+ } \
+ else \
+ { \
+ if (!r && !g && !b) \
+ break; \
+ libclut_model_srgb_to_ciexyy(rs__[i__] / ((double)(max)), gs__[i__] / ((double)(max)), \
+ bs__[i__] / ((double)(max)), &x__, &y__, &Y__); \
+ if (r) \
+ for (i__ = 0; i__ < rn__; i__) \
+ { \
+ libclut_model_ciexyy_to_srgb(x__, y__, 1.0 - Y__, &r__, &g__, &b__); \
+ rs__[i__] = (type)((r__ * (double)(max)); \
+ } \
+ if (g) \
+ for (i__ = 0; i__ < gn__; i__) \
+ { \
+ libclut_model_ciexyy_to_srgb(x__, y__, 1.0 - Y__, &r__, &g__, &b__); \
+ gs__[i__] = (type)(g__ * (double)(max)); \
+ } \
+ if (b) \
+ for (i__ = 0; i__ < bn__; i__) \
+ { \
+ libclut_model_ciexyy_to_srgb(x__, y__, 1.0 - Y__, &r__, &g__, &b__); \
+ bs__[i__] = (type)(b__ * (double)(max)); \
+ } \
+ } \
+ } \
+ while (0)
+
+
#endif