WIP : OpenGL rendering backend

https://trello.com/c/ml2dGm9H
Move motion blur pass after TAA pass/Use converted texture coordinate in TAA pass/Use 4k CSM texture.

res/shaders/GL/TAAPassFragment.sf

@@ -14,7 +14,9 @@ uniform sampler2D uni_motionVectorTexture;
 void main()
 {
 	vec2 renderTargetSize = vec2(textureSize(uni_preTAAPassRT0, 0));
-	vec2 MotionVector = texture(uni_motionVectorTexture, TexCoords).xy;
+	vec2 texelSize = 1.0 / renderTargetSize;
+	vec2 screenTexCoords = gl_FragCoord.xy * texelSize;
+	vec2 MotionVector = texture(uni_motionVectorTexture, screenTexCoords).xy;
 
 	vec4 preTAAPassRT0Result = texture(uni_preTAAPassRT0, TexCoords);
 

res/shaders/GL/skyPassFragment.sf

@@ -62,7 +62,6 @@ vec2 rsi(vec3 r0, vec3 rd, float sr) {
 	);
 }
 
-
 //https://github.com/wwwtyro/glsl-atmosphere
 
 vec3 atmosphere(vec3 r, vec3 r0, vec3 pSun, float iSun, float rPlanet, float rAtmos, vec3 kRlh, float kMie, float shRlh, float shMie, float g) {
@@ -93,7 +92,6 @@ vec3 atmosphere(vec3 r, vec3 r0, vec3 pSun, float iSun, float rPlanet, float rAt
 
 	// Sample the primary ray.
 	for (int i = 0; i < iSteps; i++) {
-
 		// Calculate the primary ray sample position.
 		vec3 iPos = r0 + r * (iTime + iStepSize * 0.5);
 
@@ -120,7 +118,6 @@ vec3 atmosphere(vec3 r, vec3 r0, vec3 pSun, float iSun, float rPlanet, float rAt
 
 		// Sample the secondary ray.
 		for (int j = 0; j < jSteps; j++) {
-
 			// Calculate the secondary ray sample position.
 			vec3 jPos = iPos + pSun * (jTime + jStepSize * 0.5);
 
@@ -144,7 +141,6 @@ vec3 atmosphere(vec3 r, vec3 r0, vec3 pSun, float iSun, float rPlanet, float rAt
 
 		// Increment the primary ray time.
 		iTime += iStepSize;
-
 	}
 
 	// Calculate and return the final color.
@@ -175,5 +171,4 @@ void main()
 		0.758                           // Mie preferred scattering direction
 	);
 	uni_skyPassRT0 = vec4(color, 1.0);
-}
-
+}

source/engine/system/GLRenderingBackend/GLMotionBlurPass.cpp

@@ -1,6 +1,6 @@
 #include "GLMotionBlurPass.h"
 #include "GLOpaquePass.h"
-#include "GLPreTAAPass.h"
+#include "GLPostTAAPass.h"
 
 #include "GLRenderingSystemUtilities.h"
 #include "../../component/GLRenderingSystemComponent.h"
@@ -67,7 +67,7 @@ bool GLMotionBlurPass::update()
 		GLOpaquePass::getGLRPC()->m_GLTDCs[3],
 		0);
 	activateTexture(
-		GLPreTAAPass::getGLRPC()->m_GLTDCs[0],
+		GLPostTAAPass::getGLRPC()->m_GLTDCs[0],
 		1);
 
 	auto l_MDC = g_pCoreSystem->getAssetSystem()->getMeshDataComponent(MeshShapeType::QUAD);

source/engine/system/GLRenderingBackend/GLRenderingSystem.cpp

@@ -302,13 +302,6 @@ bool GLRenderingSystemNS::update()
 
 	auto l_canvasGLRPC = GLPreTAAPass::getGLRPC();
 
-	if (l_renderingConfig.useMotionBlur)
-	{
-		GLMotionBlurPass::update();
-
-		l_canvasGLRPC = GLMotionBlurPass::getGLRPC();
-	}
-
 	if (l_renderingConfig.useTAA)
 	{
 		GLTAAPass::update(l_canvasGLRPC);
@@ -317,6 +310,13 @@ bool GLRenderingSystemNS::update()
 		l_canvasGLRPC = GLPostTAAPass::getGLRPC();
 	}
 
+	if (l_renderingConfig.useMotionBlur)
+	{
+		GLMotionBlurPass::update();
+
+		l_canvasGLRPC = GLMotionBlurPass::getGLRPC();
+	}
+
 	if (l_renderingConfig.useBloom)
 	{
 		GLBloomExtractPass::update(l_canvasGLRPC);

source/engine/system/GLRenderingBackend/GLShadowRenderPass.cpp

@@ -40,8 +40,8 @@ void GLShadowRenderPass::initialize()
 
 	DirLightShadowPassFBDesc.renderBufferAttachmentType = GL_DEPTH_ATTACHMENT;
 	DirLightShadowPassFBDesc.renderBufferInternalFormat = GL_DEPTH_COMPONENT32;
-	DirLightShadowPassFBDesc.sizeX = 2048;
-	DirLightShadowPassFBDesc.sizeY = 2048;
+	DirLightShadowPassFBDesc.sizeX = 4096;
+	DirLightShadowPassFBDesc.sizeY = 4096;
 	DirLightShadowPassFBDesc.drawColorBuffers = false;
 
 	DirLightShadowPassTextureDesc.textureSamplerType = TextureSamplerType::SAMPLER_2D;