colorchecker.cpp File Reference

Tachyon demo scene that emulates the famous "ColorChecker" color rendition charts, as a means of testing for correct color space conversions, and to evaluate the impact of HDR tone mapping operators on the rendered images. More...

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "ProfileHooks.h"
#include "stb_image_write.h"
#include "TachyonOptiX.h"
#include "colorchecker_tables.h"

Go to the source code of this file.

Macros
#define	STB_IMAGE_WRITE_IMPLEMENTATION

Functions
void	HSItoRGB (float h, float s, float i, float &r, float &g, float &b)
void	int_to_normalized_float (const int *srgbi, int maxval, float *srgbf)
void	srgb_to_linear (const float *srgb, float *lin)
void	linear_to_srgb (const float *lin, float *srgb)
void	img_draw_box_rgba4ub (int bxs, int bys, int bxe, int bye, unsigned char *rgba4ub, int imgxs, int imgys, unsigned char *img)
void	img_draw_box_rgbaf32 (int bxs, int bys, int bxe, int bye, float *rgbaf32, int imgxs, int imgys, float *img)
unsigned char *	img_gen_colorchecker_4ub (int tilesz, int pad, const int *srgbi, int &imgszx, int &imgszy)
float *	img_gen_colorchecker_f32 (int tilesz, int pad, const int *srgbi, int maxval, int convertsrgbtolinear, int &imgszx, int &imgszy)
float *	calc_colorchecker_gridpts (float tilesz, float pad, float height)
float *	calc_colorchecker_linear_rgba (const int *srgbi, int maxval)
float *	calc_colorchecker_patch_verts (float tilesz, float pad, float height)
int *	calc_colorchecker_patch_indices (int &numtris, int &meshindices)
float *	calc_colorchecker_patch_colors (const float *colors)
void	color4f_to_color3f (float *col3f, const float *col4f, int num)
void	gen_colorchecker_spheres (TachyonOptiX *rt, int numpts, float *coords, float radius, float *colors, int mat)
void	gen_chart (TachyonOptiX *rt, int numpts, float *coords, int *trimesh_indices, float *colors, int mat)
void	gen_teximg (TachyonOptiX *rt, int imszx, int imszy, float width, float height, float length, int mat)
void	gen_floor (TachyonOptiX *rt, float width, float height, float length, int mat)
int	main (int argc, const char **argv)

Detailed Description

Tachyon demo scene that emulates the famous "ColorChecker" color rendition charts, as a means of testing for correct color space conversions, and to evaluate the impact of HDR tone mapping operators on the rendered images.

Definition in file colorchecker.cpp.

Macro Definition Documentation

STB_IMAGE_WRITE_IMPLEMENTATION

#define STB_IMAGE_WRITE_IMPLEMENTATION

Definition at line 45 of file colorchecker.cpp.

Function Documentation

calc_colorchecker_gridpts()

float* calc_colorchecker_gridpts	(	float	tilesz,
		float	pad,
		float	height
	)

Definition at line 250 of file colorchecker.cpp.

References COLORCHECKER_NUM_PATCHES.

Referenced by main().

calc_colorchecker_linear_rgba()

float* calc_colorchecker_linear_rgba	(	const int *	srgbi,
		int	maxval
	)

Definition at line 285 of file colorchecker.cpp.

References COLORCHECKER_NUM_PATCHES, int_to_normalized_float(), and srgb_to_linear().

Referenced by main().

calc_colorchecker_patch_colors()

float* calc_colorchecker_patch_colors

(

const float *

colors

)

Definition at line 385 of file colorchecker.cpp.

References COLORCHECKER_NUM_PATCHES.

Referenced by main().

calc_colorchecker_patch_indices()

int* calc_colorchecker_patch_indices	(	int &	numtris,
		int &	meshindices
	)

Definition at line 358 of file colorchecker.cpp.

References COLORCHECKER_NUM_PATCHES.

Referenced by main().

calc_colorchecker_patch_verts()

float* calc_colorchecker_patch_verts	(	float	tilesz,
		float	pad,
		float	height
	)

Definition at line 309 of file colorchecker.cpp.

References COLORCHECKER_NUM_PATCHES.

Referenced by main().

color4f_to_color3f()

void color4f_to_color3f	(	float *	col3f,
		const float *	col4f,
		int	num
	)

Definition at line 409 of file colorchecker.cpp.

Referenced by gen_chart(), gen_colorchecker_spheres(), and gen_floor().

gen_chart()

void gen_chart	(	TachyonOptiX *	rt,
		int	numpts,
		float *	coords,
		int *	trimesh_indices,
		float *	colors,
		int	mat
	)

Definition at line 447 of file colorchecker.cpp.

References TachyonOptiX::add_trimesh(), color4f_to_color3f(), TriangleMesh::indices, TriangleMesh::vertcolors3f, and TriangleMesh::vertices.

Referenced by main().

gen_colorchecker_spheres()

void gen_colorchecker_spheres	(	TachyonOptiX *	rt,
		int	numpts,
		float *	coords,
		float	radius,
		float *	colors,
		int	mat
	)

Definition at line 423 of file colorchecker.cpp.

References TachyonOptiX::add_spherearray(), SphereArray::center, color4f_to_color3f(), SphereArray::primcolors3f, and SphereArray::radius.

Referenced by main().

gen_floor()

void gen_floor	(	TachyonOptiX *	rt,
		float	width,
		float	height,
		float	length,
		int	mat
	)

Definition at line 524 of file colorchecker.cpp.

References TachyonOptiX::add_trimesh(), color4f_to_color3f(), TriangleMesh::indices, length(), TriangleMesh::vertcolors3f, and TriangleMesh::vertices.

Referenced by main().

gen_teximg()

void gen_teximg	(	TachyonOptiX *	rt,
		int	imszx,
		int	imszy,
		float	width,
		float	height,
		float	length,
		int	mat
	)

Definition at line 470 of file colorchecker.cpp.

References TachyonOptiX::add_trimesh(), TriangleMesh::indices, length(), TriangleMesh::tex2d, and TriangleMesh::vertices.

Referenced by main().

HSItoRGB()

void HSItoRGB	(	float	h,
		float	s,
		float	i,
		float &	r,
		float &	g,
		float &	b
	)

Definition at line 58 of file colorchecker.cpp.

References M_PI.

img_draw_box_rgba4ub()

void img_draw_box_rgba4ub	(	int	bxs,
		int	bys,
		int	bxe,
		int	bye,
		unsigned char *	rgba4ub,
		int	imgxs,
		int	imgys,
		unsigned char *	img
	)

Definition at line 101 of file colorchecker.cpp.

Referenced by img_gen_colorchecker_4ub().

img_draw_box_rgbaf32()

void img_draw_box_rgbaf32	(	int	bxs,
		int	bys,
		int	bxe,
		int	bye,
		float *	rgbaf32,
		int	imgxs,
		int	imgys,
		float *	img
	)

Definition at line 132 of file colorchecker.cpp.

Referenced by img_gen_colorchecker_f32().

img_gen_colorchecker_4ub()

unsigned char* img_gen_colorchecker_4ub	(	int	tilesz,
		int	pad,
		const int *	srgbi,
		int &	imgszx,
		int &	imgszy
	)

Definition at line 162 of file colorchecker.cpp.

References img_draw_box_rgba4ub().

Referenced by main().

img_gen_colorchecker_f32()

float* img_gen_colorchecker_f32	(	int	tilesz,
		int	pad,
		const int *	srgbi,
		int	maxval,
		int	convertsrgbtolinear,
		int &	imgszx,
		int &	imgszy
	)

Definition at line 202 of file colorchecker.cpp.

References img_draw_box_rgbaf32(), and srgb_to_linear().

int_to_normalized_float()

void int_to_normalized_float	(	const int *	srgbi,
		int	maxval,
		float *	srgbf
	)

Definition at line 66 of file colorchecker.cpp.

Referenced by calc_colorchecker_linear_rgba().

linear_to_srgb()

void linear_to_srgb	(	const float *	lin,
		float *	srgb
	)

Definition at line 83 of file colorchecker.cpp.

main()

int main	(	int	argc,
		const char **	argv
	)

static methods for querying OptiX-supprted GPU hardware independent of whether we actually have an active context.

Definition at line 574 of file colorchecker.cpp.

References TachyonOptiX::add_directional_light(), TachyonOptiX::add_material(), TachyonOptiX::add_material_textured(), TachyonOptiX::add_tex2d_rgba4u(), calc_colorchecker_gridpts(), calc_colorchecker_linear_rgba(), calc_colorchecker_patch_colors(), calc_colorchecker_patch_indices(), calc_colorchecker_patch_verts(), TachyonOptiX::camera_dof_enable(), colorchecker_maxval, COLORCHECKER_NUM_PATCHES, colorchecker_srgbi, TachyonOptiX::device_count(), TachyonOptiX::framebuffer_colorspace(), TachyonOptiX::framebuffer_download_rgb4u(), TachyonOptiX::framebuffer_get_size(), TachyonOptiX::framebuffer_resize(), gen_chart(), gen_colorchecker_spheres(), gen_floor(), gen_teximg(), img_gen_colorchecker_4ub(), TachyonOptiX::optix_version(), TachyonOptiX::print_raystats_info(), PROFILE_POP_RANGE, PROFILE_PUSH_RANGE, PROFILE_START, TachyonOptiX::render(), TachyonOptiX::RT_BACKGROUND_TEXTURE_SKY_SPHERE, RT_COLORSPACE_sRGB, TachyonOptiX::RT_FOG_NONE, TachyonOptiX::RT_PERSPECTIVE, RT_TEX_COLORSPACE_sRGB, TachyonOptiX::RT_VERB_TIMING, TachyonOptiX::set_aa_samples(), TachyonOptiX::set_ao_ambient(), TachyonOptiX::set_ao_direct(), TachyonOptiX::set_ao_maxdist(), TachyonOptiX::set_ao_samples(), TachyonOptiX::set_bg_color(), TachyonOptiX::set_bg_color_grad_bot(), TachyonOptiX::set_bg_color_grad_top(), TachyonOptiX::set_bg_gradient(), TachyonOptiX::set_bg_gradient_botval(), TachyonOptiX::set_bg_gradient_topval(), TachyonOptiX::set_bg_mode(), TachyonOptiX::set_camera_dof_fnumber(), TachyonOptiX::set_camera_dof_focal_dist(), TachyonOptiX::set_camera_lookat(), TachyonOptiX::set_camera_pos(), TachyonOptiX::set_camera_stereo_convergence_dist(), TachyonOptiX::set_camera_stereo_eyesep(), TachyonOptiX::set_camera_type(), TachyonOptiX::set_camera_zoom(), TachyonOptiX::set_cue_mode(), TachyonOptiX::set_verbose_mode(), TachyonOptiX::shadows_enable(), stbi_flip_vertically_on_write(), and stbi_write_png().

srgb_to_linear()

void srgb_to_linear	(	const float *	srgb,
		float *	lin
	)

Definition at line 73 of file colorchecker.cpp.

Referenced by calc_colorchecker_linear_rgba(), and img_gen_colorchecker_f32().