#include "BLI_math_inline.h"
#include "intern/math_color_inline.c"

Macros
Defines
#define	BLI_YCC_ITU_BT601 0

#define	BLI_YCC_ITU_BT709 1

#define	BLI_YCC_JFIF_0_255 2

#define	BLI_YUV_ITU_BT601 0

#define	BLI_YUV_ITU_BT709 1

Functions
Conversion to RGB
void	hsv_to_rgb (float h, float s, float v, float r_r, float r_g, float *r_b)

void	hsv_to_rgb_v (const float hsv[3], float r_rgb[3])

void	hsl_to_rgb (float h, float s, float l, float r_r, float r_g, float *r_b)

void	hsl_to_rgb_v (const float hsl[3], float r_rgb[3])

void	hex_to_rgb (const char hexcol, float r_r, float r_g, float r_b)

void	yuv_to_rgb (float y, float u, float v, float r_r, float r_g, float *r_b, int colorspace)

void	ycc_to_rgb (float y, float cb, float cr, float r_r, float r_g, float *r_b, int colorspace)

void	cpack_to_rgb (unsigned int col, float r_r, float r_g, float *r_b)

Conversion to RGBA
void	hex_to_rgba (const char hexcol, float r_r, float r_g, float r_b, float *r_a)

Conversion from RGB
void	rgb_to_yuv (float r, float g, float b, float r_y, float r_u, float *r_v, int colorspace)

void	rgb_to_ycc (float r, float g, float b, float r_y, float r_cb, float *r_cr, int colorspace)

void	rgb_to_hsv (float r, float g, float b, float r_h, float r_s, float *r_v)

void	rgb_to_hsv_v (const float rgb[3], float r_hsv[3])

void	rgb_to_hsl (float r, float g, float b, float r_h, float r_s, float *r_l)

void	rgb_to_hsl_v (const float rgb[3], float r_hsl[3])

void	rgb_to_hsl_compat (float r, float g, float b, float r_h, float r_s, float *r_l)

void	rgb_to_hsl_compat_v (const float rgb[3], float r_hsl[3])

void	rgb_to_hsv_compat (float r, float g, float b, float r_h, float r_s, float *r_v)

void	rgb_to_hsv_compat_v (const float rgb[3], float r_hsv[3])

unsigned int	rgb_to_cpack (float r, float g, float b)

unsigned int	hsv_to_cpack (float h, float s, float v)

Profile Transformations
float	srgb_to_linearrgb (float c)

float	linearrgb_to_srgb (float c)

void	srgb_to_linearrgb_v3_v3 (float linear[3], const float srgb[3])

void	linearrgb_to_srgb_v3_v3 (float srgb[3], const float linear[3])

MINLINE void	srgb_to_linearrgb_v4 (float linear[4], const float srgb[4])

MINLINE void	linearrgb_to_srgb_v4 (float srgb[4], const float linear[4])

MINLINE void	srgb_to_linearrgb_predivide_v4 (float linear[4], const float srgb[4])

MINLINE void	linearrgb_to_srgb_predivide_v4 (float srgb[4], const float linear[4])

MINLINE unsigned short	to_srgb_table_lookup (float f)

MINLINE void	linearrgb_to_srgb_ushort4 (unsigned short srgb[4], const float linear[4])

MINLINE void	srgb_to_linearrgb_uchar4 (float linear[4], const unsigned char srgb[4])

MINLINE void	srgb_to_linearrgb_uchar4_predivide (float linear[4], const unsigned char srgb[4])

MINLINE void	linearrgb_to_srgb_uchar3 (unsigned char srgb[3], const float linear[3])

MINLINE void	linearrgb_to_srgb_uchar4 (unsigned char srgb[4], const float linear[4])

void	BLI_init_srgb_conversion (void)

Alpha Transformations
MINLINE void	premul_to_straight_v4_v4 (float straight[4], const float premul[4])

MINLINE void	premul_to_straight_v4 (float color[4])

MINLINE void	straight_to_premul_v4_v4 (float premul[4], const float straight[4])

MINLINE void	straight_to_premul_v4 (float color[4])

MINLINE void	straight_uchar_to_premul_float (float result[4], const unsigned char color[4])

MINLINE void	premul_float_to_straight_uchar (unsigned char *result, const float color[4])

lift/gamma/gain / ASC-CDL conversion
void	lift_gamma_gain_to_asc_cdl (const float lift, const float gamma, const float gain, float offset, float slope, float power)

Other
#define	rgba_char_args_set_fl(col, r, g, b, a) rgba_char_args_set(col, (r) * 255, (g) * 255, (b) * 255, (a) * 255)

#define	rgba_float_args_set_ch(col, r, g, b, a) rgba_float_args_set(col, (r) / 255.0f, (g) / 255.0f, (b) / 255.0f, (a) / 255.0f)

int	constrain_rgb (float r, float g, float *b)

void	minmax_rgb (short c[3])

void	hsv_clamp_v (float hsv[3], float v_max)

void	rgb_float_set_hue_float_offset (float rgb[3], float hue_offset)

void	rgb_byte_set_hue_float_offset (unsigned char rgb[3], float hue_offset)

void	rgb_uchar_to_float (float r_col[3], const unsigned char col_ub[3])

void	rgba_uchar_to_float (float r_col[4], const unsigned char col_ub[4])

void	rgb_float_to_uchar (unsigned char r_col[3], const float col_f[3])

void	rgba_float_to_uchar (unsigned char r_col[4], const float col_f[4])

MINLINE float	rgb_to_grayscale (const float rgb[3])

MINLINE unsigned char	rgb_to_grayscale_byte (const unsigned char rgb[3])

MINLINE int	compare_rgb_uchar (const unsigned char col_a[3], const unsigned char col_b[3], int limit)

MINLINE float	dither_random_value (float s, float t)

MINLINE void	float_to_byte_dither_v3 (unsigned char b[3], const float f[3], float dither, float s, float t)

MINLINE void	rgba_uchar_args_set (unsigned char col[4], unsigned char r, unsigned char g, unsigned char b, unsigned char a)

MINLINE void	rgba_float_args_set (float col[4], float r, float g, float b, float a)

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)

Macro Definition Documentation

◆ BLI_YCC_ITU_BT601

#define BLI_YCC_ITU_BT601 0

Definition at line 22 of file BLI_math_color.h.

Referenced by BKE_scopes_update(), blender::nodes::node_composite_combine_color_cc::CombineColorShaderNode::get_shader_function_name(), blender::nodes::node_composite_combine_ycca_cc::CombineYCCAShaderNode::get_shader_function_name(), blender::nodes::node_composite_separate_color_cc::SeparateColorShaderNode::get_shader_function_name(), blender::nodes::node_composite_separate_ycca_cc::SeparateYCCAShaderNode::get_shader_function_name(), rgb_to_ycc(), blender::compositor::ConvertRGBToYCCOperation::set_mode(), blender::compositor::ConvertYCCToRGBOperation::set_mode(), TEST(), and ycc_to_rgb().

◆ BLI_YCC_ITU_BT709

#define BLI_YCC_ITU_BT709 1

Definition at line 23 of file BLI_math_color.h.

Referenced by BKE_scopes_update(), blender::compositor::ChannelMatteNode::convert_to_operations(), blender::compositor::ChromaMatteNode::convert_to_operations(), blender::compositor::DistanceMatteNode::convert_to_operations(), blender::nodes::node_composite_combine_color_cc::CombineColorShaderNode::get_shader_function_name(), blender::nodes::node_composite_combine_ycca_cc::CombineYCCAShaderNode::get_shader_function_name(), blender::nodes::node_composite_separate_color_cc::SeparateColorShaderNode::get_shader_function_name(), blender::nodes::node_composite_separate_ycca_cc::SeparateYCCAShaderNode::get_shader_function_name(), imb_load_openexr(), node_cmp_combsep_color_init(), rgb_to_ycc(), blender::compositor::ConvertRGBToYCCOperation::set_mode(), blender::compositor::ConvertYCCToRGBOperation::set_mode(), blender::compositor::KeyingNode::setup_pre_blur(), TEST(), and ycc_to_rgb().

◆ BLI_YCC_JFIF_0_255

#define BLI_YCC_JFIF_0_255 2

Definition at line 24 of file BLI_math_color.h.

Referenced by BKE_scopes_update(), blender::nodes::node_composite_combine_color_cc::CombineColorShaderNode::get_shader_function_name(), blender::nodes::node_composite_combine_ycca_cc::CombineYCCAShaderNode::get_shader_function_name(), blender::nodes::node_composite_separate_color_cc::SeparateColorShaderNode::get_shader_function_name(), blender::nodes::node_composite_separate_ycca_cc::SeparateYCCAShaderNode::get_shader_function_name(), rgb_to_ycc(), blender::compositor::ConvertRGBToYCCOperation::set_mode(), blender::compositor::ConvertYCCToRGBOperation::set_mode(), TEST(), and ycc_to_rgb().

◆ BLI_YUV_ITU_BT601

#define BLI_YUV_ITU_BT601 0

Definition at line 27 of file BLI_math_color.h.

Referenced by rgb_to_yuv(), and yuv_to_rgb().

◆ BLI_YUV_ITU_BT709

#define BLI_YUV_ITU_BT709 1

Definition at line 28 of file BLI_math_color.h.

Referenced by draw_vectorscope_graticule(), ED_image_draw_info(), rgb_to_uv(), rgb_to_yuv(), save_sample_line(), blender::compositor::CalculateMeanOperation::set_setting(), TEST(), ui_draw_but_VECTORSCOPE(), blender::compositor::ConvertRGBToYUVOperation::update_memory_buffer_partial(), blender::compositor::ConvertYUVToRGBOperation::update_memory_buffer_partial(), vectorscope_draw_target(), and yuv_to_rgb().

◆ rgba_char_args_set_fl

#define rgba_char_args_set_fl	(	col,
		r,
		g,
		b,
		a ) rgba_char_args_set(col, (r) * 255, (g) * 255, (b) * 255, (a) * 255)

Definition at line 187 of file BLI_math_color.h.

◆ rgba_float_args_set_ch

#define rgba_float_args_set_ch	(	col,
		r,
		g,
		b,
		a ) rgba_float_args_set(col, (r) / 255.0f, (g) / 255.0f, (b) / 255.0f, (a) / 255.0f)

Definition at line 190 of file BLI_math_color.h.

Referenced by widgetbase_set_uniform_colors_ubv().

Function Documentation

◆ BLI_init_srgb_conversion()

void BLI_init_srgb_conversion ( void )

Definition at line 831 of file math_color.cc.

References b, BLI_color_from_srgb_table, BLI_color_to_srgb_table, hipart(), index_to_float(), initialized, linearrgb_to_srgb(), and srgb_to_linearrgb().

Referenced by colormanagement_init(), blender::gpu::GPUTest::SetUp(), blender::tests::TEST(), blender::tests::TEST(), blender::tests::TEST(), blender::tests::TEST(), and blender::tests::TEST().

◆ compare_rgb_uchar()

MINLINE int compare_rgb_uchar	(	const unsigned char	col_a[3],
		const unsigned char	col_b[3],
		int	limit )

Definition at line 217 of file math_color_inline.c.

References abs(), b, and int.

◆ constrain_rgb()

int constrain_rgb	(	float *	r,
		float *	g,
		float *	b )

If the requested RGB shade contains a negative weight for one of the primaries, it lies outside the color gamut accessible from the given triple of primaries. Desaturate it by adding white, equal quantities of R, G, and B, enough to make RGB all positive. The function returns 1 if the components were modified, zero otherwise.

Definition at line 709 of file math_color.cc.

References b, min_ffff(), and w().

◆ cpack_cpy_3ub()

MINLINE void cpack_cpy_3ub	(	unsigned char	r_col[3],
		unsigned int	pack )

Definition at line 185 of file math_color_inline.c.

◆ cpack_to_rgb()

void cpack_to_rgb	(	unsigned int	col,
		float *	r_r,
		float *	r_g,
		float *	r_b )

Definition at line 395 of file math_color.cc.

References col, and float.

Referenced by BKE_palette_from_hash().

◆ dither_random_value()

MINLINE float dither_random_value	(	float	s,
		float	t )

Return triangle noise in [-0.5..1.5] range.

Definition at line 235 of file math_color_inline.c.

References floorf, and sinf.

Referenced by float_to_byte_dither_v3(), float_to_byte_dither_v4(), and ushort_to_byte_dither_v4().

◆ float_to_byte_dither_v3()

MINLINE void float_to_byte_dither_v3	(	unsigned char	b[3],
		const float	f[3],
		float	dither,
		float	s,
		float	t )

Definition at line 250 of file math_color_inline.c.

References b, dither_random_value(), and unit_float_to_uchar_clamp.

Referenced by do_projectpaint_draw(), and do_projectpaint_thread().

◆ hex_to_rgb()

void hex_to_rgb	(	const char *	hexcol,
		float *	r_r,
		float *	r_g,
		float *	r_b )

Definition at line 185 of file math_color.cc.

References hex_to_rgba().

Referenced by BKE_gpencil_palette_ensure().

◆ hex_to_rgba()

void hex_to_rgba	(	const char *	hexcol,
		float *	r_r,
		float *	r_g,
		float *	r_b,
		float *	r_a )

Definition at line 190 of file math_color.cc.

References CLAMP, and float.

Referenced by hex_to_rgb(), and ui_colorpicker_hex_rna_cb().

◆ hsl_to_rgb()

void hsl_to_rgb	(	float	h,
		float	s,
		float	l,
		float *	r_r,
		float *	r_g,
		float *	r_b )

Definition at line 38 of file math_color.cc.

References CLAMP, fabsf, and l.

Referenced by BKE_icon_geom_invert_lightness(), blender::nodes::node_fn_combine_color_cc::get_multi_function(), hsl_to_rgb_v(), osl_prepend_color_from(), osl_transformc(), and svm_combine_color().

◆ hsl_to_rgb_v()

void hsl_to_rgb_v	(	const float	hsl[3],
		float	r_rgb[3] )

Definition at line 62 of file math_color.cc.

References hsl_to_rgb().

Referenced by BKE_colorband_evaluate(), color_mul_hsl_v3(), colorfn(), TEST(), ui_color_picker_hsv_to_rgb(), ui_color_picker_to_rgb_HSVCUBE_v(), and blender::compositor::ConvertHSLToRGBOperation::update_memory_buffer_partial().

◆ hsv_clamp_v()

void hsv_clamp_v	(	float	hsv[3],
		float	v_max )

Clamp hsv to usable values.

Definition at line 349 of file math_color.cc.

References CLAMP, floorf, and UNLIKELY.

◆ hsv_to_cpack()

unsigned int hsv_to_cpack	(	float	h,
		float	s,
		float	v )

We define a 'cpack' here as a (3 byte color code) number that can be expressed like 0xFFAA66 or so. For that reason it is sensitive for endianness... with this function it works correctly.

See also: imm_cpack

Definition at line 358 of file math_color.cc.

References b, col, hsv_to_rgb(), and v.

◆ hsv_to_rgb()

void hsv_to_rgb	(	float	h,
		float	s,
		float	v,
		float *	r_r,
		float *	r_g,
		float *	r_b )

Definition at line 21 of file math_color.cc.

References CLAMP, fabsf, and v.

Referenced by BKE_paint_face_set_overlay_color_get(), blend_color_color_byte(), blend_color_color_float(), blend_color_hue_byte(), blend_color_hue_float(), blend_color_luminosity_byte(), blend_color_luminosity_float(), blend_color_saturation_byte(), blend_color_saturation_float(), CombineHSVNode::constant_fold(), do_hue_sat_fac(), blender::nodes::node_fn_combine_color_cc::get_multi_function(), hsv_to_cpack(), hsv_to_rgb_v(), hue_correct_apply_threaded(), IMB_saturation(), blender::color::mix_color(), blender::color::mix_hue(), blender::color::mix_luminosity(), blender::color::mix_saturation(), node_mix_color(), node_mix_hue(), node_mix_sat(), node_mix_val(), osl_prepend_color_from(), osl_transformc(), ramp_blend(), rgb_float_set_hue_float_offset(), svm_combine_color(), svm_mix_color(), svm_mix_hue(), svm_mix_sat(), svm_mix_val(), svm_node_combine_hsv(), svm_node_hsv(), ui_draw_gradient(), blender::compositor::MixColorOperation::update_memory_buffer_row(), blender::compositor::MixHueOperation::update_memory_buffer_row(), blender::compositor::MixSaturationOperation::update_memory_buffer_row(), and blender::compositor::MixValueOperation::update_memory_buffer_row().

◆ hsv_to_rgb_v()

void hsv_to_rgb_v	(	const float	hsv[3],
		float	r_rgb[3] )

Definition at line 57 of file math_color.cc.

References hsv_to_rgb().

Referenced by blender::apply_color_factor(), BKE_colorband_evaluate(), checker_board_color_fill(), Color_channel_hsv_set(), blender::ed::sculpt_paint::color::color_filter_task(), Color_hsv_set(), colorfn(), DRW_evaluate_weight_to_color(), getcolor_fcurve_rainbow(), gpencil_layer_random_color_get(), graph_refresh_fcurve_colors(), grease_pencil_layer_random_color_get(), blender::ed::greasepencil::grease_pencil_vertex_paint_hsv_exec(), image_buf_fill_checker_slice(), blender::workbench::Material::Material(), blender::ed::sculpt_paint::greasepencil::PaintOperationExecutor::randomize_color(), rgb_tint(), TEST(), ui_color_picker_hsv_to_rgb(), ui_color_picker_to_rgb_HSVCUBE_v(), ui_do_but_COLOR(), ui_do_but_HSVCIRCLE(), blender::compositor::ConvertHSVToRGBOperation::update_memory_buffer_partial(), blender::compositor::GlareThresholdOperation::update_memory_buffer_partial(), and vertex_color_hsv_exec().

◆ lift_gamma_gain_to_asc_cdl()

void lift_gamma_gain_to_asc_cdl	(	const float *	lift,
		const float *	gamma,
		const float *	gain,
		float *	offset,
		float *	slope,
		float *	power )

Definition at line 728 of file math_color.cc.

References FLT_MAX, and power().

◆ linearrgb_to_srgb()

float linearrgb_to_srgb ( float c )

Definition at line 438 of file math_color.cc.

References powf.

Referenced by BLI_init_srgb_conversion(), blender::compositor::colorbalance_lgg(), ibuftoimage(), studiolight_irradiance_preview(), studiolight_matcap_preview(), studiolight_radiance_preview(), TEST(), TEST(), and TEST().

◆ linearrgb_to_srgb_predivide_v4()

MINLINE void linearrgb_to_srgb_predivide_v4	(	float	srgb[4],
		const float	linear[4] )

Definition at line 80 of file math_color_inline.c.

References linearrgb_to_srgb_v3_v3().

Referenced by IMB_buffer_byte_from_byte(), IMB_buffer_float_from_byte(), and IMB_buffer_float_from_float().

◆ linearrgb_to_srgb_uchar3()

MINLINE void linearrgb_to_srgb_uchar3	(	unsigned char	srgb[3],
		const float	linear[3] )

Definition at line 36 of file math_color_inline.c.

References linearrgb_to_srgb_v3_v3(), and unit_float_to_uchar_clamp_v3.

Referenced by paint_2d_bucket_fill(), and project_paint_uvpixel_init().

◆ linearrgb_to_srgb_uchar4()

MINLINE void linearrgb_to_srgb_uchar4	(	unsigned char	srgb[4],
		const float	linear[4] )

Definition at line 44 of file math_color_inline.c.

References linearrgb_to_srgb_v4(), and unit_float_to_uchar_clamp_v4.

Referenced by blender::BLI_color_convert_to_theme4b(), blender::ed::object::convert_float_color_to_byte_color(), blender::ColorSceneLinear4f< Alpha >::encode(), and Freestyle::BlenderStrokeRenderer::GenerateStrokeMesh().

◆ linearrgb_to_srgb_ushort4()

MINLINE void linearrgb_to_srgb_ushort4	(	unsigned short	srgb[4],
		const float	linear[4] )

Definition at line 123 of file math_color_inline.c.

References to_srgb_table_lookup(), and unit_float_to_ushort_clamp.

Referenced by IMB_buffer_byte_from_float().

◆ linearrgb_to_srgb_v3_v3()

void linearrgb_to_srgb_v3_v3	(	float	srgb[3],
		const float	linear[3] )

Definition at line 676 of file math_color.cc.

References linearrgb_to_srgb_approx().

Referenced by FallbackTransform::applyRGB(), BKE_palette_from_hash(), do_projectpaint_draw(), do_projectpaint_thread(), blender::ed::sculpt_paint::color::from_float(), IMB_buffer_byte_from_float(), IMB_buffer_float_from_float(), IMB_colormanagement_scene_linear_to_srgb_v3(), linearrgb_to_srgb_predivide_v4(), linearrgb_to_srgb_uchar3(), linearrgb_to_srgb_v4(), blender::ed::sculpt_paint::load_tex_task_cb_ex(), paint_2d_gradient_fill(), paint_sample_color(), TEST(), ui_but_paste_color(), ui_draw_but_CURVE(), blender::io::grease_pencil::write_fill_color_attribute(), blender::io::grease_pencil::write_stroke_color_attribute(), blender::io::grease_pencil::PDFExporter::write_stroke_to_polyline(), and blender::io::obj::OBJWriter::write_vertex_coords().

◆ linearrgb_to_srgb_v4()

MINLINE void linearrgb_to_srgb_v4	(	float	srgb[4],
		const float	linear[4] )

Definition at line 30 of file math_color_inline.c.

References linearrgb_to_srgb_v3_v3().

Referenced by blender::BLI_color_convert_to_theme4f(), IMB_buffer_byte_from_byte(), IMB_buffer_float_from_byte(), IMB_buffer_float_from_float(), linearrgb_to_srgb_uchar4(), and blender::io::ply::load_plydata().

◆ minmax_rgb()

void minmax_rgb ( short c[3] )

Definition at line 685 of file math_color.cc.

◆ premul_float_to_straight_uchar()

MINLINE void premul_float_to_straight_uchar	(	unsigned char *	result,
		const float	color[4] )

Definition at line 309 of file math_color_inline.c.

References unit_float_to_uchar_clamp.

Referenced by color_balance_byte(), curves_apply_threaded(), do_projectpaint_soften(), IMB_buffer_byte_from_float(), IMB_buffer_byte_from_float_mask(), paint_2d_ibuf_rgb_set(), project_paint_PickColor(), scene_linear_to_image_chunk_byte(), blender::imbuf::transform::store_premul_float_sample(), store_premul_pixel(), and whiteBalance_apply_threaded().

◆ premul_to_straight_v4()

MINLINE void premul_to_straight_v4 ( float color[4] )

Definition at line 279 of file math_color_inline.c.

References premul_to_straight_v4_v4().

Referenced by project_paint_uvpixel_init().

◆ premul_to_straight_v4_v4()

MINLINE void premul_to_straight_v4_v4	(	float	straight[4],
		const float	premul[4] )

Definition at line 262 of file math_color_inline.c.

Referenced by copy_original_alpha_channel(), ibuftoimage(), IMB_buffer_byte_from_float(), IMB_buffer_byte_from_float_mask(), IMB_colormanagement_imbuf_to_float_texture(), partial_buffer_update_rect(), premul_to_straight_v4(), blender::ColorSceneLinear4f< Alpha >::unpremultiply_alpha(), and blender::compositor::BrightnessOperation::update_memory_buffer_partial().

◆ rgb_byte_set_hue_float_offset()

void rgb_byte_set_hue_float_offset	(	unsigned char	rgb[3],
		float	hue_offset )

Applies an HUE offset to a byte RGB color.

Definition at line 767 of file math_color.cc.

References rgb_float_set_hue_float_offset(), rgb_float_to_uchar(), and rgb_uchar_to_float().

Referenced by color3ubv_from_seq().

◆ rgb_float_set_hue_float_offset()

void rgb_float_set_hue_float_offset	(	float	rgb[3],
		float	hue_offset )

Applies an HUE offset to a float RGB color.

Definition at line 750 of file math_color.cc.

References hsv_to_rgb(), and rgb_to_hsv().

Referenced by rgb_byte_set_hue_float_offset().

◆ rgb_float_to_uchar()

void rgb_float_to_uchar	(	unsigned char	r_col[3],
		const float	col_f[3] )

Definition at line 417 of file math_color.cc.

References unit_float_to_uchar_clamp_v3.

Referenced by acf_gpl_channel_color(), apply_tangmat_callback(), BKE_icon_geom_invert_lightness(), brush_painter_imbuf_new(), color_mul_hsl_v3(), do_projectpaint_thread(), draw_strips_background(), draw_vectorscope_graticule(), drawmeta_contents(), hue_correct_apply_threaded(), IMB_buffer_byte_from_float(), IMB_buffer_byte_from_float_mask(), IMB_saturation(), partial_buffer_update_rect(), rgb_byte_set_hue_float_offset(), and ui_tooltip_region_draw_cb().

◆ rgb_to_cpack()

unsigned int rgb_to_cpack	(	float	r,
		float	g,
		float	b )

Definition at line 374 of file math_color.cc.

References b, floorf, and max_ff().

Referenced by palette_extract_img_exec(), studiolight_irradiance_preview(), studiolight_matcap_preview(), and studiolight_radiance_preview().

◆ rgb_to_grayscale()

MINLINE float rgb_to_grayscale ( const float rgb[3] )

ITU-R BT.709 primaries https://en.wikipedia.org/wiki/Relative_luminance

Real values are: Y = 0.2126390059(R) + 0.7151686788(G) + 0.0721923154(B) according to: "Derivation of Basic Television Color Equations", RP 177-1993

As this sums slightly above 1.0, the document recommends to use: 0.2126(R) + 0.7152(G) + 0.0722(B), as used here.

The high precision values are used to calculate the rounded byte weights so they add up to 255: 54(R) + 182(G) + 19(B)

Definition at line 203 of file math_color_inline.c.

Referenced by button2d_draw_intern(), blender::bke::color_to_bool(), blender::bke::color_to_float(), blender::bke::color_to_int(), ED_view3d_text_colors_get(), file_draw_preview(), blender::nodes::node_fn_compare_cc::get_multi_function(), ui_tooltip_region_draw_cb(), and widget_swatch().