R2BilateralBlur.h File Reference

Functions for performing bilateral blurs. More...

#include "R2LogDepth.h"

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Data Structures
struct	R2_bilateral_blur_depth_aware_t
	Parameters for the blur effect. More...

Functions
vec4	R2_bilateralBlurDepthAwareSample4f (const sampler2D t, const sampler2D d, const R2_bilateral_blur_depth_aware_t blur, const vec2 uv, const float radius, const vec4 center_val, const float center_depth, inout float weight_total)
vec4	R2_bilateralBlurDepthAwareHorizontal4f (const sampler2D t, const sampler2D d, const R2_bilateral_blur_depth_aware_t blur, const vec2 uv)
vec4	R2_bilateralBlurDepthAwareVertical4f (const sampler2D t, const sampler2D d, const R2_bilateral_blur_depth_aware_t blur, const vec2 uv)

Detailed Description

Functions for performing bilateral blurs.

Definition in file R2BilateralBlur.h.

Function Documentation

R2_bilateralBlurDepthAwareHorizontal4f()

vec4 R2_bilateralBlurDepthAwareHorizontal4f	(	const sampler2D	t,
		const sampler2D	d,
		const R2_bilateral_blur_depth_aware_t	blur,
		const vec2	uv
	)

Perform a single depth-aware horizontal blur sample for texel uv in t.

The texture d is assumed to hold logarithmicaly-encoded depth samples, and the values contained within will be used to determine how much each sample contributes to the blur effect.

Parameters

t	A texture
uv	The coordinates of the current texel

Definition at line 65 of file R2BilateralBlur.h.

{
  float weight_total = 0.0;

  vec4 center_val =
    textureLod (t, uv, 0.0);
  float center_depth =
    R2_logDepthDecode (textureLod (d, uv, 0.0).x, blur.depth_coefficient);

  vec4 sum = vec4 (0.0);
  for (float r = -blur.radius; r <= blur.radius; ++r)
  {
    vec2 uv_off =
      uv + vec2 (r * blur.output_image_size_inverse.x, 0);
    sum += R2_bilateralBlurDepthAwareSample4f(
      t, d, blur, uv_off, r, center_val, center_depth, weight_total);
  }

  return sum / weight_total;
}

R2_bilateralBlurDepthAwareVertical4f()

vec4 R2_bilateralBlurDepthAwareVertical4f	(	const sampler2D	t,
		const sampler2D	d,
		const R2_bilateral_blur_depth_aware_t	blur,
		const vec2	uv
	)

Perform a single depth-aware vertical blur sample for texel uv in t.

The texture d is assumed to hold logarithmicaly-encoded depth samples, and the values contained within will be used to determine how much each sample contributes to the blur effect.

Parameters

t	A texture
uv	The coordinates of the current texel

Definition at line 102 of file R2BilateralBlur.h.

{
  float weight_total = 0.0;

  vec4 center_val =
    textureLod (t, uv, 0.0);
  float center_depth =
    R2_logDepthDecode (textureLod (d, uv, 0.0).x, blur.depth_coefficient);

  vec4 sum = vec4 (0.0);
  for (float r = -blur.radius; r <= blur.radius; ++r)
  {
    vec2 uv_off =
      uv + vec2 (0, r * blur.output_image_size_inverse.y);
    sum += R2_bilateralBlurDepthAwareSample4f(
      t, d, blur, uv_off, r, center_val, center_depth, weight_total);
  }

  return sum / weight_total;
}