diff options
Diffstat (limited to 'src/libclut.h')
| -rw-r--r-- | src/libclut.h | 311 |
1 files changed, 157 insertions, 154 deletions
diff --git a/src/libclut.h b/src/libclut.h index 78b1562..c44b40b 100644 --- a/src/libclut.h +++ b/src/libclut.h @@ -52,6 +52,84 @@ while (0) +/** + * A ramp set in CIE xyY. + * + * None of the parameter may have side-effects. + * + * This is intended for internal use. + * + * @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 utest Whether all channels can be modified at the same time. + * This test does not have to include the ramp size. + * @param rtest Whether the red channel have to be modified. + * @param gtest Whether the green channel have to be modified. + * @param btest Whether the blue channel have to be modified. + * @parma rexpr Expression calculating the intensity of the red channel. + * The current value is stored in `Y__`. + * @parma gexpr Expression calculating the intensity of the green channel. + * The current value is stored in `Y__`. + * @parma 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)); \ + } \ + } \ + } \ + while (0) + /** * Apply contrast correction on the colour curves using sRGB. @@ -101,58 +179,9 @@ * @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) \ - 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) && (g == b) && (rn__ == gn__) && (gn__ == bn__)) \ - { \ - if (r == 1.0) \ - 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__, (Y__ - 0.5) * r * 0.5, &r__, &g__, &b__); \ - rs__[i__] = (type)(r__ * (double)(max)); \ - gs__[i__] = (type)(g__ * (double)(max)); \ - bs__[i__] = (type)(b__ * (double)(max)); \ - } \ - } \ - else \ - { \ - if ((r == 1.0) && (g == 1.0) && (b == 1.0)) \ - break; \ - libclut_model_srgb_to_ciexyy(rs__[i__] / ((double)(max)), gs__[i__] / ((double)(max)), \ - bs__[i__] / ((double)(max)), &x__, &y__, &Y__); \ - if (r != 1.0) \ - for (i__ = 0; i__ < rn__; i__) \ - { \ - libclut_model_ciexyy_to_srgb(x__, y__, (Y__ - 0.5) * r + 0.5, &r__, &g__, &b__); \ - rs__[i__] = (type)(r__ * (double)(max)); \ - } \ - if (g != 1.0) \ - for (i__ = 0; i__ < gn__; i__) \ - { \ - libclut_model_ciexyy_to_srgb(x__, y__, (Y__ - 0.5) * g + 0.5, &r__, &g__, &b__); \ - gs__[i__] = (type)(g__ * (double)(max)); \ - } \ - if (b != 1.0) \ - for (i__ = 0; i__ < bn__; i__) \ - { \ - libclut_model_ciexyy_to_srgb(x__, y__, (Y__ - 0.5) * b + 0.5, &r__, &g__, &b__); \ - bs__[i__] = (type)(b__ * (double)(max)); \ - } \ - } \ - } \ - while (0) +#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) /** @@ -199,58 +228,9 @@ * @param g The brightness parameter for the green curve. * @param b The brightness parameter for the blue curve. */ -#define libclut_cie_brightness(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) && (g == b) && (rn__ == gn__) && (gn__ == bn__)) \ - { \ - if (r == 1.0) \ - 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__, Y__ * r, &r__, &g__, &b__); \ - rs__[i__] = (type)(r__ * (double)(max)); \ - gs__[i__] = (type)(g__ * (double)(max)); \ - bs__[i__] = (type)(b__ * (double)(max)); \ - } \ - } \ - else \ - { \ - if ((r == 1.0) && (g == 1.0) && (b == 1.0)) \ - break; \ - libclut_model_srgb_to_ciexyy(rs__[i__] / ((double)(max)), gs__[i__] / ((double)(max)), \ - bs__[i__] / ((double)(max)), &x__, &y__, &Y__); \ - if (r != 1.0) \ - for (i__ = 0; i__ < rn__; i__) \ - { \ - libclut_model_ciexyy_to_srgb(x__, y__, Y__ * r, &r__, &g__, &b__); \ - rs__[i__] = (type)(r__ * (double)(max)); \ - } \ - if (g != 1.0) \ - for (i__ = 0; i__ < gn__; i__) \ - { \ - libclut_model_ciexyy_to_srgb(x__, y__, Y__ * g, &r__, &g__, &b__); \ - gs__[i__] = (type)(g__ * (double)(max)); \ - } \ - if (b != 1.0) \ - for (i__ = 0; i__ < bn__; i__) \ - { \ - libclut_model_ciexyy_to_srgb(x__, y__, Y__ * b, &r__, &g__, &b__); \ - bs__[i__] = (type)(b__ * (double)(max)); \ - } \ - } \ - } \ - while (0) +#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) /** @@ -422,56 +402,8 @@ * @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) \ - 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) +#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__) /** @@ -519,6 +451,77 @@ while (0) +/** + * Changes the blackpoint and the whitepoint, 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 rmin The red component value of the blackpoint. + * @param rmax The red component value of the whitepoint. + * @param gmin The green component value of the blackpoint. + * @param gmax The green component value of the whitepoint. + * @param bmin The blue component value of the blackpoint. + * @param bmax The blue component value of the whitepoint. + */ +#define libclut_rgb_limits(ramp, max, type, rmin, rmax, gmin, gmax, bmin, bmax) \ + do \ + { \ + double diff__; \ + if ((rmin != 0.0) || (rmax != 1.0)) \ + { \ + diff__ = (double)(rmax__) - (double)(rmin__); \ + libclut__(ramp, red, type, LIBCLUT_VALUE * diff__ + (rmin__)); \ + } \ + if ((gmin != 0.0) || (gmax != 1.0)) \ + { \ + diff__ = (double)(gmax__) - (double)(gmin__); \ + libclut__(ramp, green, type, LIBCLUT_VALUE * diff__ + (gmin__)); \ + } \ + if ((bmin != 0.0) || (bmax != 1.0)) \ + { \ + diff__ = (double)(bmax__) - (double)(bmin__); \ + libclut__(ramp, blue, type, LIBCLUT_VALUE * diff__ + (bmin__)); \ + } \ + } \ + while (0) + + +/** + * Changes the blackpoint and the whitepoint, 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 rmin The red component value of the blackpoint. + * @param rmax The red component value of the whitepoint. + * @param gmin The green component value of the blackpoint. + * @param gmax The green component value of the whitepoint. + * @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); \ + } \ + while (0) + + #endif |