diff options
Diffstat (limited to 'source')
10 files changed, 196 insertions, 194 deletions
diff --git a/source/blender/blenlib/BLI_math_color.h b/source/blender/blenlib/BLI_math_color.h index dcc00064e47..64b820a22b0 100644 --- a/source/blender/blenlib/BLI_math_color.h +++ b/source/blender/blenlib/BLI_math_color.h @@ -186,9 +186,6 @@ MINLINE void rgba_uchar_args_test_set( unsigned char col[4], unsigned char r, unsigned char g, unsigned char b, unsigned char a); MINLINE void cpack_cpy_3ub(unsigned char r_col[3], unsigned int pack); -void blackbody_temperature_to_rgb_table(float *r_table, int width, float min, float max); -void wavelength_to_xyz_table(float *r_table, int width); - /** \} */ /* -------------------------------------------------------------------- */ diff --git a/source/blender/blenlib/intern/math_color.c b/source/blender/blenlib/intern/math_color.c index 52cbda82268..bdcf52ec521 100644 --- a/source/blender/blenlib/intern/math_color.c +++ b/source/blender/blenlib/intern/math_color.c @@ -597,158 +597,3 @@ void BLI_init_srgb_conversion(void) BLI_color_to_srgb_table[i] = (unsigned short)(b * 0x100); } } - -/* ****************************** blackbody ******************************** */ - -/* Calculate color in range 800..12000 using an approximation - * a/x+bx+c for R and G and ((at + b)t + c)t + d) for B - * Max absolute error for RGB is (0.00095, 0.00077, 0.00057), - * which is enough to get the same 8 bit/channel color. - */ - -static const float blackbody_table_r[6][3] = { - {2.52432244e+03f, -1.06185848e-03f, 3.11067539e+00f}, - {3.37763626e+03f, -4.34581697e-04f, 1.64843306e+00f}, - {4.10671449e+03f, -8.61949938e-05f, 6.41423749e-01f}, - {4.66849800e+03f, 2.85655028e-05f, 1.29075375e-01f}, - {4.60124770e+03f, 2.89727618e-05f, 1.48001316e-01f}, - {3.78765709e+03f, 9.36026367e-06f, 3.98995841e-01f}, -}; - -static const float blackbody_table_g[6][3] = { - {-7.50343014e+02f, 3.15679613e-04f, 4.73464526e-01f}, - {-1.00402363e+03f, 1.29189794e-04f, 9.08181524e-01f}, - {-1.22075471e+03f, 2.56245413e-05f, 1.20753416e+00f}, - {-1.42546105e+03f, -4.01730887e-05f, 1.44002695e+00f}, - {-1.18134453e+03f, -2.18913373e-05f, 1.30656109e+00f}, - {-5.00279505e+02f, -4.59745390e-06f, 1.09090465e+00f}, -}; - -static const float blackbody_table_b[6][4] = { - {0.0f, 0.0f, 0.0f, 0.0f}, - {0.0f, 0.0f, 0.0f, 0.0f}, - {0.0f, 0.0f, 0.0f, 0.0f}, - {-2.02524603e-11f, 1.79435860e-07f, -2.60561875e-04f, -1.41761141e-02f}, - {-2.22463426e-13f, -1.55078698e-08f, 3.81675160e-04f, -7.30646033e-01f}, - {6.72595954e-13f, -2.73059993e-08f, 4.24068546e-04f, -7.52204323e-01f}, -}; - -static void blackbody_temperature_to_rgb(float rgb[3], float t) -{ - if (t >= 12000.0f) { - rgb[0] = 0.826270103f; - rgb[1] = 0.994478524f; - rgb[2] = 1.56626022f; - } - else if (t < 965.0f) { - rgb[0] = 4.70366907f; - rgb[1] = 0.0f; - rgb[2] = 0.0f; - } - else { - int i = (t >= 6365.0f) ? 5 : - (t >= 3315.0f) ? 4 : - (t >= 1902.0f) ? 3 : - (t >= 1449.0f) ? 2 : - (t >= 1167.0f) ? 1 : - 0; - - const float *r = blackbody_table_r[i]; - const float *g = blackbody_table_g[i]; - const float *b = blackbody_table_b[i]; - - const float t_inv = 1.0f / t; - rgb[0] = r[0] * t_inv + r[1] * t + r[2]; - rgb[1] = g[0] * t_inv + g[1] * t + g[2]; - rgb[2] = ((b[0] * t + b[1]) * t + b[2]) * t + b[3]; - } -} - -void blackbody_temperature_to_rgb_table(float *r_table, int width, float min, float max) -{ - for (int i = 0; i < width; i++) { - float temperature = min + (max - min) / (float)width * (float)i; - - float rgb[3]; - blackbody_temperature_to_rgb(rgb, temperature); - - copy_v3_v3(&r_table[i * 4], rgb); - r_table[i * 4 + 3] = 0.0f; - } -} - -/* ****************************** wavelength ******************************** */ -/* Wavelength to RGB. */ - -/** - * CIE color matching functions `xBar`, `yBar`, and `zBar` for - * wavelengths from 380 through 780 nanometers, every 5 nanometers. - * - * For a wavelength lambda in this range: - * \code{.txt} - * cie_color_match[(lambda - 380) / 5][0] = xBar - * cie_color_match[(lambda - 380) / 5][1] = yBar - * cie_color_match[(lambda - 380) / 5][2] = zBar - * \endcode - */ - -static float cie_colour_match[81][3] = { - {0.0014f, 0.0000f, 0.0065f}, {0.0022f, 0.0001f, 0.0105f}, {0.0042f, 0.0001f, 0.0201f}, - {0.0076f, 0.0002f, 0.0362f}, {0.0143f, 0.0004f, 0.0679f}, {0.0232f, 0.0006f, 0.1102f}, - {0.0435f, 0.0012f, 0.2074f}, {0.0776f, 0.0022f, 0.3713f}, {0.1344f, 0.0040f, 0.6456f}, - {0.2148f, 0.0073f, 1.0391f}, {0.2839f, 0.0116f, 1.3856f}, {0.3285f, 0.0168f, 1.6230f}, - {0.3483f, 0.0230f, 1.7471f}, {0.3481f, 0.0298f, 1.7826f}, {0.3362f, 0.0380f, 1.7721f}, - {0.3187f, 0.0480f, 1.7441f}, {0.2908f, 0.0600f, 1.6692f}, {0.2511f, 0.0739f, 1.5281f}, - {0.1954f, 0.0910f, 1.2876f}, {0.1421f, 0.1126f, 1.0419f}, {0.0956f, 0.1390f, 0.8130f}, - {0.0580f, 0.1693f, 0.6162f}, {0.0320f, 0.2080f, 0.4652f}, {0.0147f, 0.2586f, 0.3533f}, - {0.0049f, 0.3230f, 0.2720f}, {0.0024f, 0.4073f, 0.2123f}, {0.0093f, 0.5030f, 0.1582f}, - {0.0291f, 0.6082f, 0.1117f}, {0.0633f, 0.7100f, 0.0782f}, {0.1096f, 0.7932f, 0.0573f}, - {0.1655f, 0.8620f, 0.0422f}, {0.2257f, 0.9149f, 0.0298f}, {0.2904f, 0.9540f, 0.0203f}, - {0.3597f, 0.9803f, 0.0134f}, {0.4334f, 0.9950f, 0.0087f}, {0.5121f, 1.0000f, 0.0057f}, - {0.5945f, 0.9950f, 0.0039f}, {0.6784f, 0.9786f, 0.0027f}, {0.7621f, 0.9520f, 0.0021f}, - {0.8425f, 0.9154f, 0.0018f}, {0.9163f, 0.8700f, 0.0017f}, {0.9786f, 0.8163f, 0.0014f}, - {1.0263f, 0.7570f, 0.0011f}, {1.0567f, 0.6949f, 0.0010f}, {1.0622f, 0.6310f, 0.0008f}, - {1.0456f, 0.5668f, 0.0006f}, {1.0026f, 0.5030f, 0.0003f}, {0.9384f, 0.4412f, 0.0002f}, - {0.8544f, 0.3810f, 0.0002f}, {0.7514f, 0.3210f, 0.0001f}, {0.6424f, 0.2650f, 0.0000f}, - {0.5419f, 0.2170f, 0.0000f}, {0.4479f, 0.1750f, 0.0000f}, {0.3608f, 0.1382f, 0.0000f}, - {0.2835f, 0.1070f, 0.0000f}, {0.2187f, 0.0816f, 0.0000f}, {0.1649f, 0.0610f, 0.0000f}, - {0.1212f, 0.0446f, 0.0000f}, {0.0874f, 0.0320f, 0.0000f}, {0.0636f, 0.0232f, 0.0000f}, - {0.0468f, 0.0170f, 0.0000f}, {0.0329f, 0.0119f, 0.0000f}, {0.0227f, 0.0082f, 0.0000f}, - {0.0158f, 0.0057f, 0.0000f}, {0.0114f, 0.0041f, 0.0000f}, {0.0081f, 0.0029f, 0.0000f}, - {0.0058f, 0.0021f, 0.0000f}, {0.0041f, 0.0015f, 0.0000f}, {0.0029f, 0.0010f, 0.0000f}, - {0.0020f, 0.0007f, 0.0000f}, {0.0014f, 0.0005f, 0.0000f}, {0.0010f, 0.0004f, 0.0000f}, - {0.0007f, 0.0002f, 0.0000f}, {0.0005f, 0.0002f, 0.0000f}, {0.0003f, 0.0001f, 0.0000f}, - {0.0002f, 0.0001f, 0.0000f}, {0.0002f, 0.0001f, 0.0000f}, {0.0001f, 0.0000f, 0.0000f}, - {0.0001f, 0.0000f, 0.0000f}, {0.0001f, 0.0000f, 0.0000f}, {0.0000f, 0.0000f, 0.0000f}}; - -static void wavelength_to_xyz(float xyz[3], float lambda_nm) -{ - float ii = (lambda_nm - 380.0f) * (1.0f / 5.0f); /* Scaled 0..80. */ - int i = (int)ii; - - if (i < 0 || i >= 80) { - xyz[0] = 0.0f; - xyz[1] = 0.0f; - xyz[2] = 0.0f; - } - else { - ii -= (float)i; - const float *c = cie_colour_match[i]; - xyz[0] = c[0] + ii * (c[3] - c[0]); - xyz[1] = c[1] + ii * (c[4] - c[1]); - xyz[2] = c[2] + ii * (c[5] - c[2]); - } -} - -void wavelength_to_xyz_table(float *r_table, int width) -{ - for (int i = 0; i < width; i++) { - float temperature = 380 + 400 / (float)width * (float)i; - - float rgb[3]; - wavelength_to_xyz(rgb, temperature); - - copy_v3_v3(&r_table[i * 4], rgb); - r_table[i * 4 + 3] = 0.0f; - } -} diff --git a/source/blender/draw/intern/draw_fluid.c b/source/blender/draw/intern/draw_fluid.c index d3d4bbf505e..c34025ebe52 100644 --- a/source/blender/draw/intern/draw_fluid.c +++ b/source/blender/draw/intern/draw_fluid.c @@ -20,6 +20,8 @@ #include "BKE_colorband.h" +#include "IMB_colormanagement.h" + #include "GPU_texture.h" #include "draw_manager.h" @@ -52,7 +54,7 @@ static void create_flame_spectrum_texture(float *data) float *spec_pixels = (float *)MEM_mallocN(TFUNC_WIDTH * 4 * 16 * 16 * sizeof(float), "spec_pixels"); - blackbody_temperature_to_rgb_table(data, TFUNC_WIDTH, 1500, 3000); + IMB_colormanagement_blackbody_temperature_to_rgb_table(data, TFUNC_WIDTH, 1500, 3000); for (int i = 0; i < 16; i++) { for (int j = 0; j < 16; j++) { diff --git a/source/blender/gpu/shaders/material/gpu_shader_material_blackbody.glsl b/source/blender/gpu/shaders/material/gpu_shader_material_blackbody.glsl index d0111aa3839..e257483f364 100644 --- a/source/blender/gpu/shaders/material/gpu_shader_material_blackbody.glsl +++ b/source/blender/gpu/shaders/material/gpu_shader_material_blackbody.glsl @@ -1,13 +1,5 @@ void node_blackbody(float temperature, sampler1DArray spectrummap, float layer, out vec4 color) { - if (temperature >= 12000.0) { - color = vec4(0.826270103, 0.994478524, 1.56626022, 1.0); - } - else if (temperature < 965.0) { - color = vec4(4.70366907, 0.0, 0.0, 1.0); - } - else { - float t = (temperature - 965.0) / (12000.0 - 965.0); - color = vec4(texture(spectrummap, vec2(t, layer)).rgb, 1.0); - } + float t = (temperature - 800.0) / (12000.0 - 800.0); + color = vec4(texture(spectrummap, vec2(t, layer)).rgb, 1.0); } diff --git a/source/blender/gpu/shaders/material/gpu_shader_material_wavelength.glsl b/source/blender/gpu/shaders/material/gpu_shader_material_wavelength.glsl index 2c5d38eabbe..48d627dcd0b 100644 --- a/source/blender/gpu/shaders/material/gpu_shader_material_wavelength.glsl +++ b/source/blender/gpu/shaders/material/gpu_shader_material_wavelength.glsl @@ -1,15 +1,7 @@ -void node_wavelength(float wavelength, - sampler1DArray spectrummap, - float layer, - vec3 xyz_to_r, - vec3 xyz_to_g, - vec3 xyz_to_b, - out vec4 color) +void node_wavelength(float wavelength, sampler1DArray spectrummap, float layer, out vec4 color) { - mat3 xyz_to_rgb = mat3(xyz_to_r, xyz_to_g, xyz_to_b); float t = (wavelength - 380.0) / (780.0 - 380.0); - vec3 xyz = texture(spectrummap, vec2(t, layer)).rgb; - vec3 rgb = xyz * xyz_to_rgb; + vec3 rgb = texture(spectrummap, vec2(t, layer)).rgb; rgb *= 1.0 / 2.52; /* Empirical scale from lg to make all comps <= 1. */ color = vec4(clamp(rgb, 0.0, 1.0), 1.0); } diff --git a/source/blender/imbuf/IMB_colormanagement.h b/source/blender/imbuf/IMB_colormanagement.h index 50af946cd95..512dc674fc7 100644 --- a/source/blender/imbuf/IMB_colormanagement.h +++ b/source/blender/imbuf/IMB_colormanagement.h @@ -514,6 +514,18 @@ enum { /** \} */ +/* -------------------------------------------------------------------- */ +/** \name Rendering Tables + * \{ */ + +void IMB_colormanagement_blackbody_temperature_to_rgb_table(float *r_table, + const int width, + const float min, + const float max); +void IMB_colormanagement_wavelength_to_rgb_table(float *r_table, const int width); + +/** \} */ + #ifdef __cplusplus } #endif diff --git a/source/blender/imbuf/intern/colormanagement.c b/source/blender/imbuf/intern/colormanagement.c index 014efaa4aba..d4c9e78a299 100644 --- a/source/blender/imbuf/intern/colormanagement.c +++ b/source/blender/imbuf/intern/colormanagement.c @@ -4117,3 +4117,170 @@ void IMB_colormanagement_finish_glsl_draw(void) } /** \} */ + +/* -------------------------------------------------------------------- */ +/** \name Rendering Tables + * \{ */ + +/* Calculate color in range 800..12000 using an approximation + * a/x+bx+c for R and G and ((at + b)t + c)t + d) for B + * + * The result of this can be negative to support gamut wider than + * than rec.709, just needs to be clamped. */ + +static const float blackbody_table_r[7][3] = {{1.61919106e+03f, -2.05010916e-03f, 5.02995757e+00f}, + {2.48845471e+03f, -1.11330907e-03f, 3.22621544e+00f}, + {3.34143193e+03f, -4.86551192e-04f, 1.76486769e+00f}, + {4.09461742e+03f, -1.27446582e-04f, 7.25731635e-01f}, + {4.67028036e+03f, 2.91258199e-05f, 1.26703442e-01f}, + {4.59509185e+03f, 2.87495649e-05f, 1.50345020e-01f}, + {3.78717450e+03f, 9.35907826e-06f, 3.99075871e-01f}}; + +static const float blackbody_table_g[7][3] = { + {-4.88999748e+02f, 6.04330754e-04f, -7.55807526e-02f}, + {-7.55994277e+02f, 3.16730098e-04f, 4.78306139e-01f}, + {-1.02363977e+03f, 1.20223470e-04f, 9.36662319e-01f}, + {-1.26571316e+03f, 4.87340896e-06f, 1.27054498e+00f}, + {-1.42529332e+03f, -4.01150431e-05f, 1.43972784e+00f}, + {-1.17554822e+03f, -2.16378048e-05f, 1.30408023e+00f}, + {-5.00799571e+02f, -4.59832026e-06f, 1.09098763e+00f}}; + +static const float blackbody_table_b[7][4] = { + {5.96945309e-11f, -4.85742887e-08f, -9.70622247e-05f, -4.07936148e-03f}, + {2.40430366e-11f, 5.55021075e-08f, -1.98503712e-04f, 2.89312858e-02f}, + {-1.40949732e-11f, 1.89878968e-07f, -3.56632824e-04f, 9.10767778e-02f}, + {-3.61460868e-11f, 2.84822009e-07f, -4.93211319e-04f, 1.56723440e-01f}, + {-1.97075738e-11f, 1.75359352e-07f, -2.50542825e-04f, -2.22783266e-02f}, + {-1.61997957e-13f, -1.64216008e-08f, 3.86216271e-04f, -7.38077418e-01f}, + {6.72650283e-13f, -2.73078809e-08f, 4.24098264e-04f, -7.52335691e-01f}}; + +static void blackbody_temperature_to_rec709(float rec709[3], float t) +{ + if (t >= 12000.0f) { + rec709[0] = 0.8262954810464208f; + rec709[1] = 0.9945080501520986f; + rec709[2] = 1.566307710274283f; + } + else if (t < 800.0f) { + rec709[0] = 5.413294490189271f; + rec709[1] = -0.20319390035873933f; + rec709[2] = -0.0822535242887164f; + } + else { + int i = (t >= 6365.0f) ? 6 : + (t >= 3315.0f) ? 5 : + (t >= 1902.0f) ? 4 : + (t >= 1449.0f) ? 3 : + (t >= 1167.0f) ? 2 : + (t >= 965.0f) ? 1 : + 0; + + const float *r = blackbody_table_r[i]; + const float *g = blackbody_table_g[i]; + const float *b = blackbody_table_b[i]; + + const float t_inv = 1.0f / t; + rec709[0] = r[0] * t_inv + r[1] * t + r[2]; + rec709[1] = g[0] * t_inv + g[1] * t + g[2]; + rec709[2] = ((b[0] * t + b[1]) * t + b[2]) * t + b[3]; + } +} + +void IMB_colormanagement_blackbody_temperature_to_rgb_table(float *r_table, + const int width, + const float min, + const float max) +{ + for (int i = 0; i < width; i++) { + float temperature = min + (max - min) / (float)width * (float)i; + + float rec709[3]; + blackbody_temperature_to_rec709(rec709, temperature); + + float rgb[3]; + IMB_colormanagement_rec709_to_scene_linear(rgb, rec709); + clamp_v3(rgb, 0.0f, FLT_MAX); + + copy_v3_v3(&r_table[i * 4], rgb); + r_table[i * 4 + 3] = 0.0f; + } +} + +/** + * CIE color matching functions `xBar`, `yBar`, and `zBar` for + * wavelengths from 380 through 780 nanometers, every 5 nanometers. + * + * For a wavelength lambda in this range: + * \code{.txt} + * cie_color_match[(lambda - 380) / 5][0] = xBar + * cie_color_match[(lambda - 380) / 5][1] = yBar + * cie_color_match[(lambda - 380) / 5][2] = zBar + * \endcode + */ + +static float cie_colour_match[81][3] = { + {0.0014f, 0.0000f, 0.0065f}, {0.0022f, 0.0001f, 0.0105f}, {0.0042f, 0.0001f, 0.0201f}, + {0.0076f, 0.0002f, 0.0362f}, {0.0143f, 0.0004f, 0.0679f}, {0.0232f, 0.0006f, 0.1102f}, + {0.0435f, 0.0012f, 0.2074f}, {0.0776f, 0.0022f, 0.3713f}, {0.1344f, 0.0040f, 0.6456f}, + {0.2148f, 0.0073f, 1.0391f}, {0.2839f, 0.0116f, 1.3856f}, {0.3285f, 0.0168f, 1.6230f}, + {0.3483f, 0.0230f, 1.7471f}, {0.3481f, 0.0298f, 1.7826f}, {0.3362f, 0.0380f, 1.7721f}, + {0.3187f, 0.0480f, 1.7441f}, {0.2908f, 0.0600f, 1.6692f}, {0.2511f, 0.0739f, 1.5281f}, + {0.1954f, 0.0910f, 1.2876f}, {0.1421f, 0.1126f, 1.0419f}, {0.0956f, 0.1390f, 0.8130f}, + {0.0580f, 0.1693f, 0.6162f}, {0.0320f, 0.2080f, 0.4652f}, {0.0147f, 0.2586f, 0.3533f}, + {0.0049f, 0.3230f, 0.2720f}, {0.0024f, 0.4073f, 0.2123f}, {0.0093f, 0.5030f, 0.1582f}, + {0.0291f, 0.6082f, 0.1117f}, {0.0633f, 0.7100f, 0.0782f}, {0.1096f, 0.7932f, 0.0573f}, + {0.1655f, 0.8620f, 0.0422f}, {0.2257f, 0.9149f, 0.0298f}, {0.2904f, 0.9540f, 0.0203f}, + {0.3597f, 0.9803f, 0.0134f}, {0.4334f, 0.9950f, 0.0087f}, {0.5121f, 1.0000f, 0.0057f}, + {0.5945f, 0.9950f, 0.0039f}, {0.6784f, 0.9786f, 0.0027f}, {0.7621f, 0.9520f, 0.0021f}, + {0.8425f, 0.9154f, 0.0018f}, {0.9163f, 0.8700f, 0.0017f}, {0.9786f, 0.8163f, 0.0014f}, + {1.0263f, 0.7570f, 0.0011f}, {1.0567f, 0.6949f, 0.0010f}, {1.0622f, 0.6310f, 0.0008f}, + {1.0456f, 0.5668f, 0.0006f}, {1.0026f, 0.5030f, 0.0003f}, {0.9384f, 0.4412f, 0.0002f}, + {0.8544f, 0.3810f, 0.0002f}, {0.7514f, 0.3210f, 0.0001f}, {0.6424f, 0.2650f, 0.0000f}, + {0.5419f, 0.2170f, 0.0000f}, {0.4479f, 0.1750f, 0.0000f}, {0.3608f, 0.1382f, 0.0000f}, + {0.2835f, 0.1070f, 0.0000f}, {0.2187f, 0.0816f, 0.0000f}, {0.1649f, 0.0610f, 0.0000f}, + {0.1212f, 0.0446f, 0.0000f}, {0.0874f, 0.0320f, 0.0000f}, {0.0636f, 0.0232f, 0.0000f}, + {0.0468f, 0.0170f, 0.0000f}, {0.0329f, 0.0119f, 0.0000f}, {0.0227f, 0.0082f, 0.0000f}, + {0.0158f, 0.0057f, 0.0000f}, {0.0114f, 0.0041f, 0.0000f}, {0.0081f, 0.0029f, 0.0000f}, + {0.0058f, 0.0021f, 0.0000f}, {0.0041f, 0.0015f, 0.0000f}, {0.0029f, 0.0010f, 0.0000f}, + {0.0020f, 0.0007f, 0.0000f}, {0.0014f, 0.0005f, 0.0000f}, {0.0010f, 0.0004f, 0.0000f}, + {0.0007f, 0.0002f, 0.0000f}, {0.0005f, 0.0002f, 0.0000f}, {0.0003f, 0.0001f, 0.0000f}, + {0.0002f, 0.0001f, 0.0000f}, {0.0002f, 0.0001f, 0.0000f}, {0.0001f, 0.0000f, 0.0000f}, + {0.0001f, 0.0000f, 0.0000f}, {0.0001f, 0.0000f, 0.0000f}, {0.0000f, 0.0000f, 0.0000f}}; + +static void wavelength_to_xyz(float xyz[3], float lambda_nm) +{ + float ii = (lambda_nm - 380.0f) * (1.0f / 5.0f); /* Scaled 0..80. */ + int i = (int)ii; + + if (i < 0 || i >= 80) { + xyz[0] = 0.0f; + xyz[1] = 0.0f; + xyz[2] = 0.0f; + } + else { + ii -= (float)i; + const float *c = cie_colour_match[i]; + xyz[0] = c[0] + ii * (c[3] - c[0]); + xyz[1] = c[1] + ii * (c[4] - c[1]); + xyz[2] = c[2] + ii * (c[5] - c[2]); + } +} + +void IMB_colormanagement_wavelength_to_rgb_table(float *r_table, const int width) +{ + for (int i = 0; i < width; i++) { + float temperature = 380 + 400 / (float)width * (float)i; + + float xyz[3]; + wavelength_to_xyz(xyz, temperature); + + float rgb[3]; + IMB_colormanagement_xyz_to_scene_linear(rgb, xyz); + clamp_v3(rgb, 0.0f, FLT_MAX); + + copy_v3_v3(&r_table[i * 4], rgb); + r_table[i * 4 + 3] = 0.0f; + } +} + +/** \} */ diff --git a/source/blender/nodes/shader/nodes/node_shader_blackbody.cc b/source/blender/nodes/shader/nodes/node_shader_blackbody.cc index 62e631efb57..9f382e5a3bb 100644 --- a/source/blender/nodes/shader/nodes/node_shader_blackbody.cc +++ b/source/blender/nodes/shader/nodes/node_shader_blackbody.cc @@ -3,6 +3,8 @@ #include "node_shader_util.hh" +#include "IMB_colormanagement.h" + namespace blender::nodes::node_shader_blackbody_cc { static void node_declare(NodeDeclarationBuilder &b) @@ -20,7 +22,7 @@ static int node_shader_gpu_blackbody(GPUMaterial *mat, const int size = CM_TABLE + 1; float *data = static_cast<float *>(MEM_mallocN(sizeof(float) * size * 4, "blackbody texture")); - blackbody_temperature_to_rgb_table(data, size, 965.0f, 12000.0f); + IMB_colormanagement_blackbody_temperature_to_rgb_table(data, size, 800.0f, 12000.0f); float layer; GPUNodeLink *ramp_texture = GPU_color_band(mat, size, data, &layer); diff --git a/source/blender/nodes/shader/nodes/node_shader_volume_principled.cc b/source/blender/nodes/shader/nodes/node_shader_volume_principled.cc index 07e700e550a..4c4122a905f 100644 --- a/source/blender/nodes/shader/nodes/node_shader_volume_principled.cc +++ b/source/blender/nodes/shader/nodes/node_shader_volume_principled.cc @@ -3,6 +3,8 @@ #include "node_shader_util.hh" +#include "IMB_colormanagement.h" + namespace blender::nodes::node_shader_volume_principled_cc { static void node_declare(NodeDeclarationBuilder &b) @@ -109,7 +111,7 @@ static int node_shader_gpu_volume_principled(GPUMaterial *mat, float *data, layer; if (use_blackbody) { data = (float *)MEM_mallocN(sizeof(float) * size * 4, "blackbody texture"); - blackbody_temperature_to_rgb_table(data, size, 965.0f, 12000.0f); + IMB_colormanagement_blackbody_temperature_to_rgb_table(data, size, 800.0f, 12000.0f); } else { data = (float *)MEM_callocN(sizeof(float) * size * 4, "blackbody black"); diff --git a/source/blender/nodes/shader/nodes/node_shader_wavelength.cc b/source/blender/nodes/shader/nodes/node_shader_wavelength.cc index 522928a30fa..34fa639dd07 100644 --- a/source/blender/nodes/shader/nodes/node_shader_wavelength.cc +++ b/source/blender/nodes/shader/nodes/node_shader_wavelength.cc @@ -3,6 +3,8 @@ #include "node_shader_util.hh" +#include "IMB_colormanagement.h" + namespace blender::nodes::node_shader_wavelength_cc { static void node_declare(NodeDeclarationBuilder &b) @@ -20,22 +22,11 @@ static int node_shader_gpu_wavelength(GPUMaterial *mat, const int size = CM_TABLE + 1; float *data = static_cast<float *>(MEM_mallocN(sizeof(float) * size * 4, "cie_xyz texture")); - wavelength_to_xyz_table(data, size); + IMB_colormanagement_wavelength_to_rgb_table(data, size); float layer; GPUNodeLink *ramp_texture = GPU_color_band(mat, size, data, &layer); - XYZ_to_RGB xyz_to_rgb; - get_XYZ_to_RGB_for_gpu(&xyz_to_rgb); - return GPU_stack_link(mat, - node, - "node_wavelength", - in, - out, - ramp_texture, - GPU_constant(&layer), - GPU_uniform(xyz_to_rgb.r), - GPU_uniform(xyz_to_rgb.g), - GPU_uniform(xyz_to_rgb.b)); + return GPU_stack_link(mat, node, "node_wavelength", in, out, ramp_texture, GPU_constant(&layer)); } } // namespace blender::nodes::node_shader_wavelength_cc |