- convert the SSAO pass to use hw_postprocess
This commit is contained in:
Magnus Norddahl
parent
ecb5d69ae3
commit
35c13763db
11 changed files with 464 additions and 553 deletions
|
|
@ -3,6 +3,7 @@
|
|||
#include "hw_postprocess.h"
|
||||
#include "hwrenderer/utility/hw_cvars.h"
|
||||
#include "hwrenderer/postprocessing/hw_postprocess_cvars.h"
|
||||
#include <random>
|
||||
|
||||
Postprocess hw_postprocess;
|
||||
|
||||
|
|
@ -558,8 +559,7 @@ void PPTonemap::UpdateTextures()
|
|||
{
|
||||
if (gl_tonemap == Palette)
|
||||
{
|
||||
auto &texture = hw_postprocess.Textures["Tonemap.Palette"];
|
||||
if (!texture.Data)
|
||||
if (!hw_postprocess.Textures.CheckKey("Tonemap.Palette"))
|
||||
{
|
||||
std::shared_ptr<void> data(new uint32_t[512 * 512], [](void *p) { delete[](uint32_t*)p; });
|
||||
|
||||
|
|
@ -581,7 +581,7 @@ void PPTonemap::UpdateTextures()
|
|||
}
|
||||
}
|
||||
|
||||
texture = { 512, 512, PixelFormat::Rgba8, data };
|
||||
hw_postprocess.Textures["Tonemap.Palette"] = { 512, 512, PixelFormat::Rgba8, data };
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -618,3 +618,218 @@ void PPTonemap::UpdateSteps()
|
|||
steps.Push(step);
|
||||
hw_postprocess.Effects["TonemapScene"] = steps;
|
||||
}
|
||||
|
||||
|
||||
/////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
void PPAmbientOcclusion::DeclareShaders()
|
||||
{
|
||||
// Must match quality values in PPAmbientOcclusion::UpdateTextures
|
||||
int numDirections, numSteps;
|
||||
switch (gl_ssao)
|
||||
{
|
||||
default:
|
||||
case LowQuality: numDirections = 2; numSteps = 4; break;
|
||||
case MediumQuality: numDirections = 4; numSteps = 4; break;
|
||||
case HighQuality: numDirections = 8; numSteps = 4; break;
|
||||
}
|
||||
|
||||
FString defines;
|
||||
defines.Format(R"(
|
||||
#define USE_RANDOM_TEXTURE
|
||||
#define RANDOM_TEXTURE_WIDTH 4.0
|
||||
#define NUM_DIRECTIONS %d.0
|
||||
#define NUM_STEPS %d.0
|
||||
)", numDirections, numSteps);
|
||||
|
||||
hw_postprocess.Shaders["SSAO.LinearDepth"] = { "shaders/glsl/lineardepth.fp", "", LinearDepthUniforms::Desc() };
|
||||
hw_postprocess.Shaders["SSAO.LinearDepthMS"] = { "shaders/glsl/lineardepth.fp", "#define MULTISAMPLE\n", LinearDepthUniforms::Desc() };
|
||||
hw_postprocess.Shaders["SSAO.AmbientOcclude"] = { "shaders/glsl/ssao.fp", defines, SSAOUniforms::Desc() };
|
||||
hw_postprocess.Shaders["SSAO.AmbientOccludeMS"] = { "shaders/glsl/ssao.fp", defines + "\n#define MULTISAMPLE\n", SSAOUniforms::Desc() };
|
||||
hw_postprocess.Shaders["SSAO.BlurVertical"] = { "shaders/glsl/depthblur.fp", "#define BLUR_VERTICAL\n", DepthBlurUniforms::Desc() };
|
||||
hw_postprocess.Shaders["SSAO.BlurHorizontal"] = { "shaders/glsl/depthblur.fp", "#define BLUR_HORIZONTAL\n", DepthBlurUniforms::Desc() };
|
||||
hw_postprocess.Shaders["SSAO.Combine"] = { "shaders/glsl/ssaocombine.fp", "", AmbientCombineUniforms::Desc() };
|
||||
hw_postprocess.Shaders["SSAO.CombineMS"] = { "shaders/glsl/ssaocombine.fp", "#define MULTISAMPLE\n", AmbientCombineUniforms::Desc() };
|
||||
}
|
||||
|
||||
void PPAmbientOcclusion::UpdateTextures()
|
||||
{
|
||||
int width = hw_postprocess.SceneWidth;
|
||||
int height = hw_postprocess.SceneHeight;
|
||||
|
||||
if (width <= 0 || height <= 0)
|
||||
return;
|
||||
|
||||
AmbientWidth = (width + 1) / 2;
|
||||
AmbientHeight = (height + 1) / 2;
|
||||
|
||||
hw_postprocess.Textures["SSAO.LinearDepth"] = { AmbientWidth, AmbientHeight, PixelFormat::R32f };
|
||||
hw_postprocess.Textures["SSAO.Ambient0"] = { AmbientWidth, AmbientHeight, PixelFormat::Rg16f };
|
||||
hw_postprocess.Textures["SSAO.Ambient1"] = { AmbientWidth, AmbientHeight, PixelFormat::Rg16f };
|
||||
|
||||
// We only need to create the random texture once
|
||||
if (!hw_postprocess.Textures.CheckKey("SSAO.Random0"))
|
||||
{
|
||||
// Must match quality enum in PPAmbientOcclusion::DeclareShaders
|
||||
double numDirections[NumAmbientRandomTextures] = { 2.0, 4.0, 8.0 };
|
||||
|
||||
std::mt19937 generator(1337);
|
||||
std::uniform_real_distribution<double> distribution(0.0, 1.0);
|
||||
for (int quality = 0; quality < NumAmbientRandomTextures; quality++)
|
||||
{
|
||||
std::shared_ptr<void> data(new int16_t[16 * 4], [](void *p) { delete[](int16_t*)p; });
|
||||
int16_t *randomValues = (int16_t *)data.get();
|
||||
|
||||
for (int i = 0; i < 16; i++)
|
||||
{
|
||||
double angle = 2.0 * M_PI * distribution(generator) / numDirections[quality];
|
||||
double x = cos(angle);
|
||||
double y = sin(angle);
|
||||
double z = distribution(generator);
|
||||
double w = distribution(generator);
|
||||
|
||||
randomValues[i * 4 + 0] = (int16_t)clamp(x * 32767.0, -32768.0, 32767.0);
|
||||
randomValues[i * 4 + 1] = (int16_t)clamp(y * 32767.0, -32768.0, 32767.0);
|
||||
randomValues[i * 4 + 2] = (int16_t)clamp(z * 32767.0, -32768.0, 32767.0);
|
||||
randomValues[i * 4 + 3] = (int16_t)clamp(w * 32767.0, -32768.0, 32767.0);
|
||||
}
|
||||
|
||||
FString name;
|
||||
name.Format("SSAO.Random%d", quality);
|
||||
|
||||
hw_postprocess.Textures[name] = { 4, 4, PixelFormat::Rgba16_snorm, data };
|
||||
AmbientRandomTexture[quality] = name;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void PPAmbientOcclusion::UpdateSteps()
|
||||
{
|
||||
if (gl_ssao == 0 || hw_postprocess.SceneWidth == 0 || hw_postprocess.SceneHeight == 0)
|
||||
{
|
||||
hw_postprocess.Effects["AmbientOccludeScene"] = {};
|
||||
return;
|
||||
}
|
||||
|
||||
float bias = gl_ssao_bias;
|
||||
float aoRadius = gl_ssao_radius;
|
||||
const float blurAmount = gl_ssao_blur;
|
||||
float aoStrength = gl_ssao_strength;
|
||||
|
||||
//float tanHalfFovy = tan(fovy * (M_PI / 360.0f));
|
||||
float tanHalfFovy = 1.0f / hw_postprocess.m5;
|
||||
float invFocalLenX = tanHalfFovy * (hw_postprocess.SceneWidth / (float)hw_postprocess.SceneHeight);
|
||||
float invFocalLenY = tanHalfFovy;
|
||||
float nDotVBias = clamp(bias, 0.0f, 1.0f);
|
||||
float r2 = aoRadius * aoRadius;
|
||||
|
||||
float blurSharpness = 1.0f / blurAmount;
|
||||
|
||||
auto sceneScale = screen->SceneScale();
|
||||
auto sceneOffset = screen->SceneOffset();
|
||||
|
||||
int randomTexture = clamp(gl_ssao - 1, 0, NumAmbientRandomTextures - 1);
|
||||
|
||||
LinearDepthUniforms linearUniforms;
|
||||
linearUniforms.SampleIndex = 0;
|
||||
linearUniforms.LinearizeDepthA = 1.0f / screen->GetZFar() - 1.0f / screen->GetZNear();
|
||||
linearUniforms.LinearizeDepthB = MAX(1.0f / screen->GetZNear(), 1.e-8f);
|
||||
linearUniforms.InverseDepthRangeA = 1.0f;
|
||||
linearUniforms.InverseDepthRangeB = 0.0f;
|
||||
linearUniforms.Scale = sceneScale;
|
||||
linearUniforms.Offset = sceneOffset;
|
||||
|
||||
SSAOUniforms ssaoUniforms;
|
||||
ssaoUniforms.SampleIndex = 0;
|
||||
ssaoUniforms.UVToViewA = { 2.0f * invFocalLenX, 2.0f * invFocalLenY };
|
||||
ssaoUniforms.UVToViewB = { -invFocalLenX, -invFocalLenY };
|
||||
ssaoUniforms.InvFullResolution = { 1.0f / AmbientWidth, 1.0f / AmbientHeight };
|
||||
ssaoUniforms.NDotVBias = nDotVBias;
|
||||
ssaoUniforms.NegInvR2 = -1.0f / r2;
|
||||
ssaoUniforms.RadiusToScreen = aoRadius * 0.5f / tanHalfFovy * AmbientHeight;
|
||||
ssaoUniforms.AOMultiplier = 1.0f / (1.0f - nDotVBias);
|
||||
ssaoUniforms.AOStrength = aoStrength;
|
||||
ssaoUniforms.Scale = sceneScale;
|
||||
ssaoUniforms.Offset = sceneOffset;
|
||||
|
||||
DepthBlurUniforms blurUniforms;
|
||||
blurUniforms.BlurSharpness = blurSharpness;
|
||||
blurUniforms.InvFullResolution = { 1.0f / AmbientWidth, 1.0f / AmbientHeight };
|
||||
blurUniforms.PowExponent = gl_ssao_exponent;
|
||||
|
||||
AmbientCombineUniforms combineUniforms;
|
||||
combineUniforms.SampleCount = gl_multisample;
|
||||
combineUniforms.Scale = screen->SceneScale();
|
||||
combineUniforms.Offset = screen->SceneOffset();
|
||||
|
||||
IntRect ambientViewport;
|
||||
ambientViewport.left = 0;
|
||||
ambientViewport.top = 0;
|
||||
ambientViewport.width = AmbientWidth;
|
||||
ambientViewport.height = AmbientHeight;
|
||||
|
||||
TArray<PPStep> steps;
|
||||
|
||||
// Calculate linear depth values
|
||||
{
|
||||
PPStep step;
|
||||
step.ShaderName = gl_multisample ? "SSAO.LinearDepthMS" : "SSAO.LinearDepth";
|
||||
step.Uniforms.Set(linearUniforms);
|
||||
step.Viewport = ambientViewport;
|
||||
step.SetInputSceneDepth(0);
|
||||
step.SetInputSceneColor(1);
|
||||
step.SetOutputTexture("SSAO.LinearDepth");
|
||||
step.SetNoBlend();
|
||||
steps.Push(step);
|
||||
}
|
||||
|
||||
// Apply ambient occlusion
|
||||
{
|
||||
PPStep step;
|
||||
step.ShaderName = gl_multisample ? "SSAO.AmbientOccludeMS" : "SSAO.AmbientOcclude";
|
||||
step.Uniforms.Set(ssaoUniforms);
|
||||
step.Viewport = ambientViewport;
|
||||
step.SetInputTexture(0, "SSAO.LinearDepth");
|
||||
step.SetInputSceneNormal(1);
|
||||
step.SetInputTexture(2, AmbientRandomTexture[randomTexture], PPFilterMode::Nearest, PPWrapMode::Repeat);
|
||||
step.SetOutputTexture("SSAO.Ambient0");
|
||||
step.SetNoBlend();
|
||||
steps.Push(step);
|
||||
}
|
||||
|
||||
// Blur SSAO texture
|
||||
if (gl_ssao_debug < 2)
|
||||
{
|
||||
PPStep step;
|
||||
step.ShaderName = "SSAO.BlurHorizontal";
|
||||
step.Uniforms.Set(blurUniforms);
|
||||
step.Viewport = ambientViewport;
|
||||
step.SetInputTexture(0, "SSAO.Ambient0");
|
||||
step.SetOutputTexture("SSAO.Ambient1");
|
||||
step.SetNoBlend();
|
||||
steps.Push(step);
|
||||
|
||||
step.ShaderName = "SSAO.BlurVertical";
|
||||
step.SetInputTexture(0, "SSAO.Ambient1");
|
||||
step.SetOutputTexture("SSAO.Ambient0");
|
||||
steps.Push(step);
|
||||
}
|
||||
|
||||
// Add SSAO back to scene texture:
|
||||
{
|
||||
PPStep step;
|
||||
step.ShaderName = gl_multisample ? "SSAO.CombineMS" : "SSAO.Combine";
|
||||
step.Uniforms.Set(combineUniforms);
|
||||
step.Viewport = screen->mSceneViewport;
|
||||
step.SetInputTexture(0, "SSAO.Ambient0", PPFilterMode::Linear);
|
||||
step.SetInputSceneFog(1);
|
||||
step.SetOutputSceneColor();
|
||||
if (gl_ssao_debug != 0)
|
||||
step.SetNoBlend();
|
||||
else
|
||||
step.SetAlphaBlend();
|
||||
steps.Push(step);
|
||||
}
|
||||
|
||||
hw_postprocess.Effects["AmbientOccludeScene"] = steps;
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue