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-rw-r--r--src/libclut.h334
1 files changed, 216 insertions, 118 deletions
diff --git a/src/libclut.h b/src/libclut.h
index b63c5dc..94f30ff 100644
--- a/src/libclut.h
+++ b/src/libclut.h
@@ -45,9 +45,9 @@
#define libclut_rgb_contrast(ramp, max, type, r, g, b) \
do \
{ \
- if (r != 1.0) libclut__(ramp, red, type, LIBCLUT_VALUE - (max) / 2.0 * r + (max) / 2.0); \
- if (g != 1.0) libclut__(ramp, green, type, LIBCLUT_VALUE - (max) / 2.0 * g + (max) / 2.0); \
- if (b != 1.0) libclut__(ramp, blue, type, LIBCLUT_VALUE - (max) / 2.0 * b + (max) / 2.0); \
+ if ((r) != 1.0) libclut__(ramp, red, type, LIBCLUT_VALUE - (max) * 0.5 * (r) + (max) * 0.5); \
+ if ((g) != 1.0) libclut__(ramp, green, type, LIBCLUT_VALUE - (max) * 0.5 * (g) + (max) * 0.5); \
+ if ((b) != 1.0) libclut__(ramp, blue, type, LIBCLUT_VALUE - (max) * 0.5 * (b) + (max) * 0.5); \
} \
while (0)
@@ -71,9 +71,9 @@
* @param g The contrast parameter for the green curve.
* @param b The contrast parameter for the blue curve.
*/
-#define libclut_cie_contrast(ramp, max, type, r, g, b) \
- libclut_cie__(ramp, max, type, (r == g) && (g == b), r != 1.0, g != 1.0, b != 1.0, \
- (Y__ - 0.5) * r + 0.5, (Y__ - 0.5) * g + 0.5, (Y__ - 0.5) * b + 0.5)
+#define libclut_cie_contrast(ramp, max, type, r, g, b) \
+ libclut_cie__(ramp, max, type, (r == g) && (g == b), (r) != 1.0, (g) != 1.0, (b) != 1.0, \
+ (Y__ - 0.5) * (r) + 0.5, (Y__ - 0.5) * (g) + 0.5, (Y__ - 0.5) * (b) + 0.5)
/**
@@ -93,13 +93,13 @@
* @param g The brightness parameter for the green curve.
* @param b The brightness parameter for the blue curve.
*/
-#define libclut_rgb_brightness(ramp, max, type, r, g, b) \
- do \
- { \
- if (r != 1.0) libclut__(ramp, red, type, LIBCLUT_VALUE * r); \
- if (g != 1.0) libclut__(ramp, green, type, LIBCLUT_VALUE * g); \
- if (b != 1.0) libclut__(ramp, blue, type, LIBCLUT_VALUE * b); \
- } \
+#define libclut_rgb_brightness(ramp, max, type, r, g, b) \
+ do \
+ { \
+ if ((r) != 1.0) libclut__(ramp, red, type, LIBCLUT_VALUE * (r)); \
+ if ((g) != 1.0) libclut__(ramp, green, type, LIBCLUT_VALUE * (g)); \
+ if ((b) != 1.0) libclut__(ramp, blue, type, LIBCLUT_VALUE * (b)); \
+ } \
while (0)
@@ -121,8 +121,8 @@
* @param b The brightness parameter for the blue curve.
*/
#define libclut_cie_brightness(ramp, max, type, r, g, b) \
- libclut_cie__(ramp, max, type, (r == g) && (g == b), r != 1.0, g != 1.0, b != 1.0, \
- Y__ * r, Y__ * g, Y__ * b)
+ libclut_cie__(ramp, max, type, ((r) == (g)) && ((g) == (b)), \
+ (r) != 1.0, (g) != 1.0, (b) != 1.0, Y__ * (r), Y__ * (g), Y__ * (b))
/**
@@ -202,9 +202,9 @@
do \
{ \
double m__ = (double)(max); \
- if (r != 1.0) libclut__(ramp, red, type, m__ * pow(LIBCLUT_VALUE / m__, 1.0 / r)); \
- if (g != 1.0) libclut__(ramp, green, type, m__ * pow(LIBCLUT_VALUE / m__, 1.0 / g)); \
- if (b != 1.0) libclut__(ramp, blue, type, m__ * pow(LIBCLUT_VALUE / m__, 1.0 / b)); \
+ if (r != 1.0) libclut__(ramp, red, type, m__ * pow(LIBCLUT_VALUE / m__, 1.0 / (r))); \
+ if (g != 1.0) libclut__(ramp, green, type, m__ * pow(LIBCLUT_VALUE / m__, 1.0 / (g))); \
+ if (b != 1.0) libclut__(ramp, blue, type, m__ * pow(LIBCLUT_VALUE / m__, 1.0 / (b))); \
} \
while (0)
@@ -226,33 +226,33 @@
* @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__;
- }
- }
+#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)
@@ -296,8 +296,8 @@
* @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) \
- libclut_cie__(ramp, max, type, r && g && b, r, g, b, 1.0 - Y__, 1.0 - Y__, 1.0 - Y__)
+#define libclut_cie_invert(ramp, max, type, r, g, b) \
+ libclut_cie__(ramp, max, type, (r) && (g) && (b), r, g, b, 1.0 - Y__, 1.0 - Y__, 1.0 - Y__)
/**
@@ -404,15 +404,15 @@
* @param bmin The blue component value of the blackpoint.
* @param bmax The blue component value of the whitepoint.
*/
-#define libclut_cie_limits(ramp, max, type, rmin, rmax, gmin, gmax, bmin, bmax) \
- do \
- { \
- double rd__ = (rmax) - (rmin), gd__ = (gmax) - (gmin), bd__ = (bmax) - (bmin); \
- libclut_cie__(ramp, max, type, (rmin == gmin) && (gmin == bmin) && \
- (rmax == gmax) && (gmax == bmax), (rmin != 0.0) || (rmax != 1.0), \
- (gmin != 0.0) || (gmax != 1.0), (bmin != 0.0) || (bmax != 1.0), \
- Y__ * rd__ + rmin, Y__ * gd__ + gmin, Y__ * bd__ + bmin); \
- } \
+#define libclut_cie_limits(ramp, max, type, rmin, rmax, gmin, gmax, bmin, bmax) \
+ do \
+ { \
+ double rd__ = (rmax) - (rmin), gd__ = (gmax) - (gmin), bd__ = (bmax) - (bmin); \
+ libclut_cie__(ramp, max, type, ((rmin) == (gmin)) && ((gmin) == (bmin)) && \
+ ((rmax) == (gmax)) && ((gmax) == (bmax)), ((rmin) != 0.0) || ((rmax) != 1.0), \
+ ((gmin) != 0.0) || ((gmax) != 1.0), ((bmin) != 0.0) || ((bmax) != 1.0), \
+ Y__ * rd__ + (rmin), Y__ * gd__ + (gmin), Y__ * bd__ + (bmin)); \
+ } \
while (0)
@@ -438,9 +438,9 @@
do \
{ \
double m__ = (double)(max); \
- if (r) libclut__(ramp, red, type, m__ * r(LIBCLUT_VALUE / m__)); \
- if (g) libclut__(ramp, green, type, m__ * g(LIBCLUT_VALUE / m__)); \
- if (b) libclut__(ramp, blue, type, m__ * b(LIBCLUT_VALUE / m__)); \
+ if (r) libclut__(ramp, red, type, m__ * (r)(LIBCLUT_VALUE / m__)); \
+ if (g) libclut__(ramp, green, type, m__ * (g)(LIBCLUT_VALUE / m__)); \
+ if (b) libclut__(ramp, blue, type, m__ * (b)(LIBCLUT_VALUE / m__)); \
} \
while (0)
@@ -463,8 +463,8 @@
* @param b Function to manipulate the blue colour curve, should either
* be `NULL` or map a [0, 1] `double` to a [0, 1] `double`.
*/
-#define libclut_cie_manipulate(ramp, max, type, r, g, b) \
- libclut_cie__(ramp, max, type, r && g && b, r, g, b, r(Y__), g(Y__), b(Y__))
+#define libclut_cie_manipulate(ramp, max, type, r, g, b) \
+ libclut_cie__(ramp, max, type, (r) && (g) && (b), r, g, b, (r)(Y__), (g)(Y__), (b)(Y__))
/**
@@ -550,8 +550,8 @@
* @param max The maximum allowed value.
* @return The value truncated into its boundary.
*/
-#define libclut_clip__(min, val, max) \
- (LIBCLUT_VALUE < min ? min : LIBCLUT_VALUE > max ? max : LIBCLUT_VALUE)
+#define libclut_clip__(min, val, max) \
+ (LIBCLUT_VALUE < (min) ? (min) : LIBCLUT_VALUE > (max) ? (max) : LIBCLUT_VALUE)
/**
@@ -606,6 +606,7 @@
{ \
size_t x__, y__, i__, n__ = (ramp)->channel##_size; \
double xm__ = (double)((x) - 1), ym__ = (double)((y) - 1); \
+ double m__ = (double)(max); \
type c__[n__]; /* Do not use alloca! */ \
for (i__ = 0; i__ < n__; i__++) \
{ \
@@ -619,7 +620,7 @@
else \
{ \
y__ = (size_t)((double)((ramp)->channel[x__]) / (max) * ym__ + 0.5); \
- c__[i__] = (type)((double)y__ / ym__ * (max)); \
+ c__[i__] = (type)((double)y__ / ym__ * m__); \
} \
} \
memcpy((ramp)->channel, c__, n__ * sizeof(type)); \
@@ -646,7 +647,7 @@
* @param g Whether to apply the filter for the green curve.
* @param b Whether to apply the filter for the blue curve.
*/
-#define libclut_apply(ramp, max, type, filter, fmax, ftype, r, g, b)
+#define libclut_apply(ramp, max, type, filter, fmax, ftype, r, g, b) \
do \
{ \
if (r) libclut_apply__(ramp, max, type, filter, fmax, ftype, red); \
@@ -674,7 +675,7 @@
* @param ftype Same as `type`, but for the filter to apply. (Not actually used).
* @param channel The channel, must be either "red", "green", or "blue".
*/
-#define libclut_apply__(ramp, max, type, filter, fmax, ftype, channel)
+#define libclut_apply__(ramp, max, type, filter, fmax, ftype, channel) \
do \
{ \
size_t i__, rn__ = (ramp)->channel##_size, fn__ = (filter)->channel##_size; \
@@ -689,6 +690,38 @@
/**
+ * Applies a filter or calibration, 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 filter Same as `ramp`, but for the filter to apply.
+ * @param fmax Same as `max`, but for the filter to apply.
+ * @param ftype Same as `type`, but for the filter to apply. (Not actually used).
+ * @param r Whether to apply the filter for the red curve.
+ * @param g Whether to apply the filter for the green curve.
+ * @param b Whether to apply the filter for the blue curve.
+ */
+#define libclut_cie_apply(ramp, max, type, filter, fmax, ftype, r, g, b) \
+ do \
+ { \
+ size_t rfn__ = (filter)->red_size, gfn__ = (filter)->green_size; \
+ size_t bfn__ = (filter)->blue_size, x__; \
+ size_t rm__ = (double)(max), fm__ = (double)(fmax); \
+ libclut_cie__(ramp, max, type, 0, r, g, b, \
+ (x__ = (size_t)(Y__ / rm__ * rfn__), (double)((filter)->red[x__]) / fm__), \
+ (x__ = (size_t)(Y__ / rm__ * gfn__), (double)((filter)->green[x__]) / fm__), \
+ (x__ = (size_t)(Y__ / rm__ * bfn__), (double)((filter)->blue[x__]) / fm__)); \
+ } \
+ while (0)
+
+
+/**
* Modify a ramp.
*
* None of the parameter may have side-effects.
@@ -719,7 +752,7 @@
/**
- * A ramp set in CIE xyY.
+ * Modify a ramp set in CIE xyY.
*
* None of the parameter may have side-effects.
*
@@ -743,60 +776,125 @@
* @param bexpr Expression calculating the intensity of the blue channel.
* The current value is stored in `Y__`.
*/
-#define libclut_cie__(ramp, max, type, utest, rtest, gtest, btest, rexpr, gexpr, bexpr) \
- 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 ((rn__ == gn__) && (gn__ == bn__) && (utest)) \
- { \
- if (!(rtest)) \
- break; \
- 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__, rexpr, &r__, &g__, &b__); \
- rs__[i__] = (type)(r__ * (double)(max)); \
- gs__[i__] = (type)(g__ * (double)(max)); \
- bs__[i__] = (type)(b__ * (double)(max)); \
- } \
- } \
- else \
- { \
- if (!(rtest) && !(gtest) && !(btest)) \
- break; \
- libclut_model_srgb_to_ciexyy(rs__[i__] / ((double)(max)), gs__[i__] / ((double)(max)), \
- bs__[i__] / ((double)(max)), &x__, &y__, &Y__); \
- if (rtest) \
- for (i__ = 0; i__ < rn__; i__) \
- { \
- libclut_model_ciexyy_to_srgb(x__, y__, rexpr, &r__, &g__, &b__); \
- rs__[i__] = (type)((r__ * (double)(max)); \
- } \
- if (gtest) \
- for (i__ = 0; i__ < gn__; i__) \
- { \
- libclut_model_ciexyy_to_srgb(x__, y__, gexpr, &r__, &g__, &b__); \
- gs__[i__] = (type)(g__ * (double)(max)); \
- } \
- if (btest) \
- for (i__ = 0; i__ < bn__; i__) \
- { \
- libclut_model_ciexyy_to_srgb(x__, y__, nexpr, &r__, &g__, &b__); \
- bs__[i__] = (type)(b__ * (double)(max)); \
- } \
- } \
- } \
+#define libclut_cie__(ramp, max, type, utest, rtest, gtest, btest, rexpr, gexpr, bexpr) \
+ 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__; \
+ double m__ = (double)(max); \
+ type* rs__ = (ramp)->red; \
+ type* gs__ = (ramp)->green; \
+ type* bs__ = (ramp)->blue; \
+ if ((rn__ == gn__) && (gn__ == bn__) && (utest)) \
+ { \
+ if (!(rtest)) \
+ break; \
+ for (i__ = 0; i__ < rn__; i__) \
+ { \
+ libclut_model_srgb_to_ciexyy(rs__[i__] / m__, gs__[i__] / m__, \
+ bs__[i__] / m__, &x__, &y__, &Y__); \
+ libclut_model_ciexyy_to_srgb(x__, y__, rexpr, &r__, &g__, &b__); \
+ rs__[i__] = (type)(r__ * m__); \
+ gs__[i__] = (type)(g__ * m__); \
+ bs__[i__] = (type)(b__ * m__); \
+ } \
+ } \
+ else if ((rn__ == gn__) && (gn__ == bn__)) \
+ { \
+ if (!(rtest) && !(gtest) && !(btest)) \
+ break; \
+ for (i__ = 0; i__ < rn__; i__) \
+ { \
+ libclut_model_srgb_to_ciexyy(rs__[i__] / m__, gs__[i__] / m__, \
+ bs__[i__] / m__, &x__, &y__, &Y__); \
+ if (rtest) \
+ { \
+ libclut_model_ciexyy_to_srgb(x__, y__, rexpr, &r__, &g__, &b__); \
+ rs__[i__] = (type)(r__ * m__); \
+ } \
+ if (gtest) \
+ { \
+ libclut_model_ciexyy_to_srgb(x__, y__, gexpr, &r__, &g__, &b__); \
+ gs__[i__] = (type)(g__ * m__); \
+ } \
+ if (btest) \
+ { \
+ libclut_model_ciexyy_to_srgb(x__, y__, nexpr, &r__, &g__, &b__); \
+ bs__[i__] = (type)(b__ * m__); \
+ } \
+ } \
+ } \
+ else \
+ { \
+ if (rtest) \
+ for (i__ = 0; i__ < rn__; i__) \
+ libclut_cie___(ramp, max, type, rexpr, i__, \
+ libclut_i__(i__, rn__, gn__), \
+ libclut_i__(i__, rn__, bn__)); \
+ if (gtest) \
+ for (i__ = 0; i__ < rn__; i__) \
+ libclut_cie___(ramp, max, type, gexpr, \
+ libclut_i__(i__, gn__, rn__), i__, \
+ libclut_i__(i__, gn__, bn__)); \
+ if (btest) \
+ for (i__ = 0; i__ < rn__; i__) \
+ libclut_cie___(ramp, max, type, bexpr, i__, \
+ libclut_i__(i__, bn__, rn__), \
+ libclut_i__(i__, bn__, gn__), i__); \
+ } \
+ } \
+ while (0)
+
+
+/**
+ * Modify a ramp stop in CIE xyY.
+ *
+ * None of the parameter may have side-effects.
+ *
+ * This is intended for internal use.
+ * Assumes the existence of variables defined in `libclut_cie__`.
+ *
+ * @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 c Either "r" for red, "g" for green, or "b" for blue.
+ * @param expr Expression calculating the intensity of the channel.
+ * @param ri The index of the stop translated to the red channel.
+ * @param gi The index of the stop translated to the green channel.
+ * @param bi The index of the stop translated to the blue channel.
+ */
+#define libclut_cie___(ramp, max, type, c, expr, ri, gi, bi) \
+ do \
+ { \
+ for (i__ = 0; i__ < c##n__; i__) \
+ { \
+ libclut_model_srgb_to_ciexyy(rs__[(ri)] / m__, gs__[(gi)] / m__, \
+ bs__[(bi)] / m__, &x__, &y__, &Y__); \
+ libclut_model_ciexyy_to_srgb(x__, y__, expr, &r__, &g__, &b__); \
+ c##s__[i__] = (type)(c##__ * m__); \
+ } \
+ } \
while (0)
+/**
+ * Translate an index from one channel to another.
+ *
+ * @param i The index in the input channel.
+ * @param in The size of the input channel.
+ * @param out The size of the output channel.
+ * @return The index in the output channel.
+ */
+#define libclut_i__(i, in, out) \
+ (size_t)((double)(i) * (double)(out) / (double)(in))
+
+
#if __GNUC__
#define LIBCLUT_GCC_ONLY__(x) x
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