- convert colormap shader to postprocess steps

src/CMakeLists.txt

@@ -1068,7 +1068,6 @@ set (PCH_SOURCES
 	hwrenderer/postprocessing/hw_presentshader.cpp
 	hwrenderer/postprocessing/hw_present3dRowshader.cpp
 	hwrenderer/postprocessing/hw_ambientshader.cpp
-	hwrenderer/postprocessing/hw_colormapshader.cpp
 	hwrenderer/postprocessing/hw_tonemapshader.cpp
 	hwrenderer/textures/hw_material.cpp
 	hwrenderer/textures/hw_precache.cpp

src/gl/renderer/gl_postprocess.cpp

@@ -41,7 +41,6 @@
 #include "gl/data/gl_vertexbuffer.h"
 #include "hwrenderer/postprocessing/hw_ambientshader.h"
 #include "hwrenderer/postprocessing/hw_tonemapshader.h"
-#include "hwrenderer/postprocessing/hw_colormapshader.h"
 #include "hwrenderer/postprocessing/hw_presentshader.h"
 #include "hwrenderer/postprocessing/hw_postprocess.h"
 #include "hwrenderer/postprocessing/hw_postprocess_cvars.h"
@@ -451,45 +450,14 @@ void FGLRenderer::ClearTonemapPalette()
 	}
 }
 
-//-----------------------------------------------------------------------------
-//
-// Colormap scene texture and place the result in the HUD/2D texture
-//
-//-----------------------------------------------------------------------------
-
 void FGLRenderer::ColormapScene(int fixedcm)
 {
-	if (fixedcm < CM_FIRSTSPECIALCOLORMAP || fixedcm >= CM_MAXCOLORMAP)
-		return;
-
-	FGLDebug::PushGroup("ColormapScene");
-
-	FGLPostProcessState savedState;
-
-	mBuffers->BindNextFB();
-	mBuffers->BindCurrentTexture(0);
-	mColormapShader->Bind(NOQUEUE);
-
-	FSpecialColormap *scm = &SpecialColormaps[fixedcm - CM_FIRSTSPECIALCOLORMAP];
-	float m[] = { scm->ColorizeEnd[0] - scm->ColorizeStart[0],
-		scm->ColorizeEnd[1] - scm->ColorizeStart[1], scm->ColorizeEnd[2] - scm->ColorizeStart[2], 0.f };
-
-	mColormapShader->Uniforms->MapStart = { scm->ColorizeStart[0], scm->ColorizeStart[1], scm->ColorizeStart[2], 0.f };
-	mColormapShader->Uniforms->MapRange = m;
-	mColormapShader->Uniforms.Set();
-
-	RenderScreenQuad();
-	mBuffers->NextTexture();
-
-	FGLDebug::PopGroup();
+	PPColormap colormap;
+	colormap.DeclareShaders();
+	colormap.UpdateSteps(fixedcm);
+	mBuffers->RenderEffect("ColormapScene");
 }
 
-//-----------------------------------------------------------------------------
-//
-// Apply lens distortion and place the result in the HUD/2D texture
-//
-//-----------------------------------------------------------------------------
-
 void FGLRenderer::LensDistortScene()
 {
 	PPLensDistort lens;
@@ -498,12 +466,6 @@ void FGLRenderer::LensDistortScene()
 	mBuffers->RenderEffect("LensDistortScene");
 }
 
-//-----------------------------------------------------------------------------
-//
-// Apply FXAA and place the result in the HUD/2D texture
-//
-//-----------------------------------------------------------------------------
-
 void FGLRenderer::ApplyFXAA()
 {
 	PPFXAA fxaa;

src/gl/renderer/gl_renderer.cpp

@@ -52,7 +52,6 @@
 #include "gl/scene/gl_scenedrawer.h"
 #include "hwrenderer/postprocessing/hw_ambientshader.h"
 #include "hwrenderer/postprocessing/hw_tonemapshader.h"
-#include "hwrenderer/postprocessing/hw_colormapshader.h"
 #include "hwrenderer/postprocessing/hw_presentshader.h"
 #include "hwrenderer/postprocessing/hw_present3dRowshader.h"
 #include "hwrenderer/postprocessing/hw_shadowmapshader.h"
@@ -101,7 +100,6 @@ FGLRenderer::FGLRenderer(OpenGLFrameBuffer *fb)
 	mPresent3dRowShader = nullptr;
 	mTonemapShader = nullptr;
 	mTonemapPalette = nullptr;
-	mColormapShader = nullptr;
 	mLinearDepthShader = nullptr;
 	mDepthBlurShader = nullptr;
 	mSSAOShader = nullptr;
@@ -120,7 +118,6 @@ void FGLRenderer::Initialize(int width, int height)
 	mSSAOShader = new FSSAOShader();
 	mSSAOCombineShader = new FSSAOCombineShader();
 	mTonemapShader = new FTonemapShader();
-	mColormapShader = new FColormapShader();
 	mTonemapPalette = nullptr;
 	mPresentShader = new FPresentShader();
 	mPresent3dCheckerShader = new FPresent3DCheckerShader();
@@ -178,7 +175,6 @@ FGLRenderer::~FGLRenderer()
 	if (mPresent3dRowShader) delete mPresent3dRowShader;
 	if (mTonemapShader) delete mTonemapShader;
 	if (mTonemapPalette) delete mTonemapPalette;
-	if (mColormapShader) delete mColormapShader;
 	if (mShadowMapShader) delete mShadowMapShader;
 	delete mCustomPostProcessShaders;
 }

src/gl/renderer/gl_renderer.h

@@ -30,7 +30,6 @@ class FDepthBlurShader;
 class FSSAOShader;
 class FSSAOCombineShader;
 class FTonemapShader;
-class FColormapShader;
 class FPresentShader;
 class FPresent3DCheckerShader;
 class FPresent3DColumnShader; 
@@ -76,7 +75,6 @@ class FGLRenderer
 	FDepthBlurShader *mDepthBlurShader;
 	FSSAOCombineShader *mSSAOCombineShader;
 	FTonemapShader *mTonemapShader;
-	FColormapShader *mColormapShader;
 	FHardwareTexture *mTonemapPalette;
 	FPresentShader *mPresentShader;
 	FPresent3DCheckerShader *mPresent3dCheckerShader;

src/hwrenderer/postprocessing/hw_postprocess.cpp

@@ -478,3 +478,39 @@ void PPCameraExposure::UpdateSteps()
 
 	hw_postprocess.Effects["UpdateCameraExposure"] = steps;
 }
+
+/////////////////////////////////////////////////////////////////////////////
+
+void PPColormap::DeclareShaders()
+{
+	hw_postprocess.Shaders["Colormap"] = { "shaders/glsl/colormap.fp", "", ColormapUniforms::Desc() };
+}
+
+void PPColormap::UpdateSteps(int fixedcm)
+{
+	if (fixedcm < CM_FIRSTSPECIALCOLORMAP || fixedcm >= CM_MAXCOLORMAP)
+	{
+		hw_postprocess.Effects["ColormapScene"] = {};
+		return;
+	}
+
+	FSpecialColormap *scm = &SpecialColormaps[fixedcm - CM_FIRSTSPECIALCOLORMAP];
+	float m[] = { scm->ColorizeEnd[0] - scm->ColorizeStart[0],
+		scm->ColorizeEnd[1] - scm->ColorizeStart[1], scm->ColorizeEnd[2] - scm->ColorizeStart[2], 0.f };
+
+	ColormapUniforms uniforms;
+	uniforms.MapStart = { scm->ColorizeStart[0], scm->ColorizeStart[1], scm->ColorizeStart[2], 0.f };
+	uniforms.MapRange = m;
+
+	PPStep step;
+	step.ShaderName = "Colormap";
+	step.Uniforms.Set(uniforms);
+	step.Viewport = screen->mScreenViewport;
+	step.SetInputCurrent(0);
+	step.SetOutputNext();
+	step.SetNoBlend();
+
+	TArray<PPStep> steps;
+	steps.Push(step);
+	hw_postprocess.Effects["ColormapScene"] = steps;
+}

src/hwrenderer/postprocessing/hw_postprocess.h

@@ -387,3 +387,27 @@ class PPCameraExposure
 	TArray<PPExposureLevel> ExposureLevels;
 	bool FirstExposureFrame = true;
 };
+
+/////////////////////////////////////////////////////////////////////////////
+
+struct ColormapUniforms
+{
+	FVector4 MapStart;
+	FVector4 MapRange;
+
+	static std::vector<UniformFieldDesc> Desc()
+	{
+		return
+		{
+			{ "uFixedColormapStart", UniformType::Vec4, offsetof(ColormapUniforms, MapStart) },
+			{ "uFixedColormapRange", UniformType::Vec4, offsetof(ColormapUniforms, MapRange) },
+		};
+	}
+};
+
+class PPColormap
+{
+public:
+	void DeclareShaders();
+	void UpdateSteps(int fixedcm);
+};