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Fix depth blur

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This commit is contained in:
Magnus Norddahl 2016-09-10 22:39:09 +02:00
parent 24ab13f1ce
commit 0a8cc1b74c
2 changed files with 14 additions and 30 deletions
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12
src/gl/renderer/gl_postprocess.cpp
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@ -108,11 +108,6 @@ CUSTOM_CVAR(Float, gl_ssao_blur_amount, 4.0f, 0)
{
if (self < 0.1f) self = 0.1f;
}
CUSTOM_CVAR(Int, gl_ssao_blur_samples, 5, 0)
{
if (self < 3 || self > 15 || self % 2 == 0)
self = 9;
}
EXTERN_CVAR(Float, vid_brightness)
EXTERN_CVAR(Float, vid_contrast)
@ -153,7 +148,6 @@ void FGLRenderer::AmbientOccludeScene()
float bias = gl_ssao_bias;
float aoRadius = gl_ssao_radius;
const float blurAmount = gl_ssao_blur_amount;
int blurSampleCount = gl_ssao_blur_samples;
float aoStrength = gl_ssao_strength;
bool multisample = gl_multisample > 1;
@ -164,6 +158,8 @@ void FGLRenderer::AmbientOccludeScene()
float nDotVBias = clamp(bias, 0.0f, 1.0f);
float r2 = aoRadius * aoRadius;
float blurSharpness = 1.0f / blurAmount;
// Calculate linear depth values
glBindFramebuffer(GL_FRAMEBUFFER, mBuffers->AmbientFB0);
glViewport(0, 0, mBuffers->AmbientWidth, mBuffers->AmbientHeight);
@ -215,14 +211,14 @@ void FGLRenderer::AmbientOccludeScene()
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
mDepthBlurShader->Bind(false);
mDepthBlurShader->BlurSharpness[false].Set(blurAmount);
mDepthBlurShader->BlurSharpness[false].Set(blurSharpness);
mDepthBlurShader->InvFullResolution[false].Set(1.0f / mBuffers->AmbientWidth, 1.0f / mBuffers->AmbientHeight);
RenderScreenQuad();
glBindFramebuffer(GL_FRAMEBUFFER, mBuffers->AmbientFB1);
glBindTexture(GL_TEXTURE_2D, mBuffers->AmbientTexture0);
mDepthBlurShader->Bind(true);
mDepthBlurShader->BlurSharpness[true].Set(blurAmount);
mDepthBlurShader->BlurSharpness[true].Set(blurSharpness);
mDepthBlurShader->InvFullResolution[true].Set(1.0f / mBuffers->AmbientWidth, 1.0f / mBuffers->AmbientHeight);
mDepthBlurShader->PowExponent[true].Set(1.8f);
RenderScreenQuad();

32
wadsrc/static/shaders/glsl/depthblur.fp
View file

@ -7,39 +7,32 @@ uniform float BlurSharpness;
uniform vec2 InvFullResolution;
uniform float PowExponent;
#define KERNEL_RADIUS 3.0
#define KERNEL_RADIUS 7.0
struct CenterPixelData
{
vec2 UV;
float Depth;
float Sharpness;
};
float CrossBilateralWeight(float r, float sampleDepth, CenterPixelData center)
float CrossBilateralWeight(float r, float sampleDepth, float centerDepth)
{
const float blurSigma = KERNEL_RADIUS * 0.5;
const float blurFalloff = 1.0 / (2.0 * blurSigma * blurSigma);
float deltaZ = (sampleDepth - center.Depth) * center.Sharpness;
float deltaZ = (sampleDepth - centerDepth) * BlurSharpness;
return exp2(-r * r * blurFalloff - deltaZ * deltaZ);
}
void ProcessSample(float ao, float z, float r, CenterPixelData center, inout float totalAO, inout float totalW)
void ProcessSample(float ao, float z, float r, float centerDepth, inout float totalAO, inout float totalW)
{
float w = CrossBilateralWeight(r, z, center);
float w = CrossBilateralWeight(r, z, centerDepth);
totalAO += w * ao;
totalW += w;
}
void ProcessRadius(vec2 deltaUV, CenterPixelData center, inout float totalAO, inout float totalW)
void ProcessRadius(vec2 deltaUV, float centerDepth, inout float totalAO, inout float totalW)
{
for (float r = 1; r <= KERNEL_RADIUS; r += 1.0)
{
vec2 uv = r * deltaUV + center.UV;
vec2 uv = r * deltaUV + TexCoord;
vec2 aoZ = texture(AODepthTexture, uv).xy;
ProcessSample(aoZ.x, aoZ.y, r, center, totalAO, totalW);
ProcessSample(aoZ.x, aoZ.y, r, centerDepth, totalAO, totalW);
}
}
@ -47,16 +40,11 @@ vec2 ComputeBlur(vec2 deltaUV)
{
vec2 aoZ = texture(AODepthTexture, TexCoord).xy;
CenterPixelData center;
center.UV = TexCoord;
center.Depth = aoZ.y;
center.Sharpness = BlurSharpness;
float totalAO = aoZ.x;
float totalW = 1.0;
ProcessRadius(deltaUV, center, totalAO, totalW);
ProcessRadius(-deltaUV, center, totalAO, totalW);
ProcessRadius(deltaUV, aoZ.y, totalAO, totalW);
ProcessRadius(-deltaUV, aoZ.y, totalAO, totalW);
return vec2(totalAO / totalW, aoZ.y);
}