postfx.h File Reference

#include <smmintrin.h>
#include <stdint.h>

Go to the source code of this file.

Functions
void	motionBlurSSE4 (uint32_t *frame, uint32_t *previous, uint16_t blend, size_t size)
	Blend the previous frame into the current one (motion blur).
void	fadeToSSE4 (uint32_t *frame, size_t size, uint32_t color, uint16_t factor)
	Fade the frame towards a solid color.
void	darken4SSE4 (uint32_t *p0, uint32_t *p1, uint32_t *p2, uint32_t *p3, uint16_t factor)
	Scale 4 scattered pixels by a common factor.
void	vignetteSSE4 (uint32_t *frame, size_t width, size_t height, int inner_radius, int outer_radius)
	Apply a circular vignette (darkened corners).
void	gammaSSE4 (uint32_t *frame, size_t width, size_t height, float ks[3])
	Apply a per-channel smoothstep tone curve.

Function Documentation

darken4SSE4()

void darken4SSE4 ( uint32_t * p0, uint32_t * p1, uint32_t * p2, uint32_t * p3, uint16_t factor )

inline

Scale 4 scattered pixels by a common factor.

Parameters

factor

Q8 darkening factor (0 .. 256 = black .. unchanged)

fadeToSSE4()

void fadeToSSE4 ( uint32_t * frame, size_t size, uint32_t color, uint16_t factor )

inline

Fade the frame towards a solid color.

Parameters

frame	frame to fade, in place
size	number of pixels (the trailing size % 4 pixels are untouched)
color	packed ARGB target color
factor	Q8 fade amount (0 .. 256 = no change .. full color)

gammaSSE4()

void gammaSSE4 ( uint32_t * frame, size_t width, size_t height, float ks[3] )

inline

Apply a per-channel smoothstep tone curve.

Parameters

ks	per-channel gains {kr, kg, kb} (1.0 = full smoothstep)

motionBlurSSE4()

void motionBlurSSE4 ( uint32_t * frame, uint32_t * previous, uint16_t blend, size_t size )

inline

Blend the previous frame into the current one (motion blur).

DIE ENGINE Depth Integration Engine / A modern ray-caster (c) Fred's Lab 2024-2026 Frédéric Meslin / info@.nosp@m.fred.nosp@m.slab..nosp@m.net SPDX-License-Identifier: MIT If used commercially, contributions, donations are highly appreciated.

postfx functions

Parameters

frame	current frame, receives the blended result
previous	previous frame, overwritten with the blended result
blend	Q8 blend factor (0 .. 256 = no blur .. full previous frame)
size	number of pixels (the trailing size % 4 pixels are untouched)

vignetteSSE4()

void vignetteSSE4 ( uint32_t * frame, size_t width, size_t height, int inner_radius, int outer_radius )

inline

Apply a circular vignette (darkened corners).

Parameters

inner_radius	radius where the darkening starts, in pixels
outer_radius	radius where the frame turns black, in pixels