OrdinaryMagician/vkdoom_m
OrdinaryMagician/vkdoom_m
1
Fork 0
Code Activity

Added lens distortion shader

Browse source
This commit is contained in:
Magnus Norddahl 2016-08-02 17:32:21 +02:00
commit 6b9529d70f
11 changed files with 236 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

73
src/gl/renderer/gl_postprocess.cpp
View file

@ -68,6 +68,7 @@
#include "gl/shaders/gl_bloomshader.h"
#include "gl/shaders/gl_blurshader.h"
#include "gl/shaders/gl_tonemapshader.h"
#include "gl/shaders/gl_lensshader.h"
#include "gl/shaders/gl_presentshader.h"
//==========================================================================
@ -95,6 +96,12 @@ CUSTOM_CVAR(Int, gl_bloom_kernel_size, 7, 0)
self = 7;
}
CVAR(Bool, gl_lens, false, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
CVAR(Float, gl_lens_k, -0.15f, 0)
CVAR(Float, gl_lens_kcube, 0.15f, 0)
CVAR(Float, gl_lens_chromatic, 1.2f, 0)
EXTERN_CVAR(Float, vid_brightness)
EXTERN_CVAR(Float, vid_contrast)
@ -260,6 +267,70 @@ void FGLRenderer::TonemapScene()
glActiveTexture(activeTex);
}
//-----------------------------------------------------------------------------
//
// Apply lens distortion and place the result in the HUD/2D texture
//
//-----------------------------------------------------------------------------
void FGLRenderer::LensDistortScene()
{
if (gl_lens == 0)
return;
GLint activeTex, textureBinding, samplerBinding;
glGetIntegerv(GL_ACTIVE_TEXTURE, &activeTex);
glActiveTexture(GL_TEXTURE0);
glGetIntegerv(GL_TEXTURE_BINDING_2D, &textureBinding);
if (gl.flags & RFL_SAMPLER_OBJECTS)
{
glGetIntegerv(GL_SAMPLER_BINDING, &samplerBinding);
glBindSampler(0, 0);
}
GLboolean blendEnabled, scissorEnabled;
glGetBooleanv(GL_BLEND, &blendEnabled);
glGetBooleanv(GL_SCISSOR_TEST, &scissorEnabled);
glDisable(GL_BLEND);
glDisable(GL_SCISSOR_TEST);
float k[4] =
{
gl_lens_k,
gl_lens_k * gl_lens_chromatic,
gl_lens_k * gl_lens_chromatic * gl_lens_chromatic,
0.0f
};
float kcube[4] =
{
gl_lens_kcube,
gl_lens_kcube * gl_lens_chromatic,
gl_lens_kcube * gl_lens_chromatic * gl_lens_chromatic,
0.0f
};
mBuffers->BindHudFB();
mBuffers->BindSceneTexture(0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
mLensShader->Bind();
mLensShader->InputTexture.Set(0);
mLensShader->LensDistortionCoefficient.Set(k);
mLensShader->CubicDistortionValue.Set(kcube);
mVBO->BindVBO();
mVBO->RenderScreenQuad();
if (blendEnabled)
glEnable(GL_BLEND);
if (scissorEnabled)
glEnable(GL_SCISSOR_TEST);
glBindTexture(GL_TEXTURE_2D, textureBinding);
if (gl.flags & RFL_SAMPLER_OBJECTS)
glBindSampler(0, samplerBinding);
glActiveTexture(activeTex);
}
//-----------------------------------------------------------------------------
//
// Gamma correct while copying to frame buffer
@ -357,6 +428,8 @@ void FGLRenderer::CopyToBackbuffer(const GL_IRECT *bounds, bool applyGamma)
mPresentShader->Brightness.Set(clamp<float>(vid_brightness, -0.8f, 0.8f));
}
mBuffers->BindHudTexture(0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
mVBO->BindVBO();
mVBO->RenderScreenQuad(mScreenViewport.width / (float)mBuffers->GetWidth(), mScreenViewport.height / (float)mBuffers->GetHeight());