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Added FXAA post-processing

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Implementation of Fast Approximate Anti-Aliasing is based on nVidia sample:
https://github.com/NVIDIAGameWorks/GraphicsSamples/tree/master/samples/es3-kepler/FXAA
This commit is contained in:
alexey.lysiuk 2016-09-25 12:25:01 +03:00 • committed by Christoph Oelckers
commit c68aa2b241
11 changed files with 897 additions and 1 deletions
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54
src/gl/renderer/gl_postprocess.cpp
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@ -60,6 +60,7 @@
#include "gl/shaders/gl_tonemapshader.h"
#include "gl/shaders/gl_colormapshader.h"
#include "gl/shaders/gl_lensshader.h"
#include "gl/shaders/gl_fxaashader.h"
#include "gl/shaders/gl_presentshader.h"
#include "gl/renderer/gl_2ddrawer.h"
#include "gl/stereo3d/gl_stereo3d.h"
@ -98,6 +99,14 @@ CVAR(Float, gl_lens_k, -0.12f, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
CVAR(Float, gl_lens_kcube, 0.1f, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
CVAR(Float, gl_lens_chromatic, 1.12f, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
CUSTOM_CVAR(Int, gl_fxaa, 0, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
{
if (self < 0 || self >= FFXAAShader::Count)
{
self = 0;
}
}
EXTERN_CVAR(Float, vid_brightness)
EXTERN_CVAR(Float, vid_contrast)
@ -447,6 +456,51 @@ void FGLRenderer::LensDistortScene()
FGLDebug::PopGroup();
}
//-----------------------------------------------------------------------------
//
// Apply FXAA and place the result in the HUD/2D texture
//
//-----------------------------------------------------------------------------
void FGLRenderer::ApplyFXAA()
{
if (0 == gl_fxaa)
{
return;
}
FGLDebug::PushGroup("ApplyFXAA");
const GLfloat rpcRes[2] =
{
1.0f / mBuffers->GetWidth(),
1.0f / mBuffers->GetHeight()
};
FGLPostProcessState savedState;
mBuffers->BindNextFB();
mBuffers->BindCurrentTexture(0);
mFXAALumaShader->Bind();
mFXAALumaShader->InputTexture.Set(0);
RenderScreenQuad();
mBuffers->NextTexture();
mBuffers->BindNextFB();
mBuffers->BindCurrentTexture(0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
mFXAAShader->Bind();
mFXAAShader->InputTexture.Set(0);
mFXAAShader->ReciprocalResolution.Set(rpcRes);
RenderScreenQuad();
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
mBuffers->NextTexture();
FGLDebug::PopGroup();
}
//-----------------------------------------------------------------------------
//
// Copies the rendered screen to its final destination