Texture.cpp File Reference

#include "Texture.hpp"
#include <bc7enc.h>
#include <limits>
#include <stb_image_write.h>
#include <stb_image.h>

Functions
float4	SampleF32Bilinear (Span< const float4 > mip, uint32_t mipW, uint32_t mipH, float u, float v)
float4	SampleF32Trilinear (const float4 *const *mips, const uint32_t *mipW, const uint32_t *mipH, uint32_t mipCount, float u, float v, float mip)
float2	EquirectDirectionToUV (float3 dir)
float3	EquirectUVToDirection (float2 uv)
void	LoadDDS (FTexture &texture, StringView path)
void	LoadRGBA8 (FTexture &texture, StringView path, bool gamma)
void	LoadRGBA8 (FTexture &texture, Span< const unsigned char > data, bool gamma)
void	LoadHDR (FTexture &texture, StringView path)
void	LoadHDR (FTexture &texture, Span< const unsigned char > data)
void	SaveHDR (const float *data, int width, int height, StringView path)
void	SavePNG (const unsigned char *data, int width, int height, StringView path)

Function Documentation

EquirectDirectionToUV()

float2 EquirectDirectionToUV

(

float3

dir

)

EquirectUVToDirection()

float3 EquirectUVToDirection

(

float2

uv

)

LoadDDS()

void LoadDDS	(	FTexture &	texture,
		StringView	path
	)

Loads a DDS file into a texture

Note

This is an alias of FSerialize. FTexture is in fact in standard DDS format.

LoadHDR() [1/2]

void LoadHDR	(	FTexture &	texture,
		Span< const unsigned char >	data
	)

LoadHDR() [2/2]

void LoadHDR	(	FTexture &	texture,
		StringView	path
	)

Loads HDR image formats (.hdr) via stb_image into an R32G32B32A32Float texture. Used for environment maps.

LoadRGBA8() [1/2]

void LoadRGBA8	(	FTexture &	texture,
		Span< const unsigned char >	data,
		bool	gamma = true
	)

Loads standard image formats (PNG, JPG, etc.) via stb_image into an uncompressed R8G8B8A8 texture from memory

Parameters

gamma

Whether to load the image as sRGB (true) or linear (false) encoding.

LoadRGBA8() [2/2]

void LoadRGBA8	(	FTexture &	texture,
		StringView	path,
		bool	gamma = true
	)

Loads standard image formats (PNG, JPG, etc.) via stb_image into an uncompressed R8G8B8A8 texture

Parameters

gamma

Whether to load the image as sRGB (true) or linear (false) encoding.

SampleF32Bilinear()

float4 SampleF32Bilinear	(	Span< const float4 >	mip,
		uint32_t	mipW,
		uint32_t	mipH,
		float	u,
		float	v
	)

SampleF32Trilinear()

float4 SampleF32Trilinear	(	const float4 *const *	mips,
		const uint32_t *	mipW,
		const uint32_t *	mipH,
		uint32_t	mipCount,
		float	u,
		float	v,
		float	mip
	)

SaveHDR()

void SaveHDR	(	const float *	data,
		int	width,
		int	height,
		StringView	path
	)

Saves float RGBA pixel data as an HDR image. Output format is Radiance HDR (stb_image_write), RGB only (alpha discarded).

Parameters

data	Pointer to float RGBA pixel data (4 floats per pixel).
width	Image width in pixels.
height	Image height in pixels.
path	Output file path.

SavePNG()

void SavePNG	(	const unsigned char *	data,
		int	width,
		int	height,
		StringView	path
	)

Saves RGBA8 data as a PNG (.png) file via stb_image_write.

Parameters

data	Pointer to uint8 RGBA pixel data (4 bytes per pixel).
width	Image width in pixels.
height	Image height in pixels.
path	Output file path.