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Diffstat (limited to 'src/libclut.h')
| -rw-r--r-- | src/libclut.h | 137 |
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 |