From 4a9de05bb1682c1bdd546693274fdd0a3fd917c8 Mon Sep 17 00:00:00 2001
From: Jules Blok <jules.blok@gmail.com>
Date: Sun, 29 Nov 2015 01:49:55 +0100
Subject: [PATCH] CRenderTarget: Use the default framebuffer in case HW.pBaseRT
 is set.

---
 src/Layers/xrRender/R_Backend.h              |  3 +++
 src/Layers/xrRenderGL/glR_Backend_Runtime.h  | 15 +++++++++++++++
 src/Layers/xrRenderPC_GL/gl_rendertarget.cpp | 20 +++++++++++++-------
 3 files changed, 31 insertions(+), 7 deletions(-)

diff --git a/src/Layers/xrRender/R_Backend.h b/src/Layers/xrRender/R_Backend.h
index 20cf0390a47..7120439d4cd 100644
--- a/src/Layers/xrRender/R_Backend.h
+++ b/src/Layers/xrRender/R_Backend.h
@@ -93,6 +93,7 @@ class  ECORE_API CBackend
 private:
 	// Render-targets
 #ifdef USE_OGL
+	GLuint							pFB;
 	GLuint							pRT[4];
 	GLuint							pZB;
 #else
@@ -252,8 +253,10 @@ class  ECORE_API CBackend
 	IC	const Fmatrix&				get_xform_project	();
 
 #ifdef USE_OGL
+	IC	void						set_FB				(GLuint FB=0);
 	IC	void						set_RT				(GLuint RT, u32 ID=0);
 	IC	void						set_ZB				(GLuint ZB);
+	IC	GLuint						get_FB				();
 	IC	GLuint						get_RT				(u32 ID=0);
 	IC	GLuint						get_ZB				();
 #else
diff --git a/src/Layers/xrRenderGL/glR_Backend_Runtime.h b/src/Layers/xrRenderGL/glR_Backend_Runtime.h
index 1ce9e62057e..602568cacd9 100644
--- a/src/Layers/xrRenderGL/glR_Backend_Runtime.h
+++ b/src/Layers/xrRenderGL/glR_Backend_Runtime.h
@@ -11,6 +11,21 @@ IC void		CBackend::set_xform(u32 ID, const Fmatrix& M)
 	//VERIFY(!"Implement CBackend::set_xform");
 }
 
+IC	GLuint CBackend::get_FB()
+{
+	return pFB;
+}
+
+IC void	CBackend::set_FB(GLuint FB)
+{
+	if (FB != pFB)
+	{
+		PGO(Msg("PGO:set_FB"));
+		pFB = FB;
+		CHK_GL(glBindFramebuffer(GL_FRAMEBUFFER, pFB));
+	}
+}
+
 IC void CBackend::set_RT(GLuint RT, u32 ID)
 {
 	if (RT != pRT[ID])
diff --git a/src/Layers/xrRenderPC_GL/gl_rendertarget.cpp b/src/Layers/xrRenderPC_GL/gl_rendertarget.cpp
index 016ca7842b7..3e994137afa 100644
--- a/src/Layers/xrRenderPC_GL/gl_rendertarget.cpp
+++ b/src/Layers/xrRenderPC_GL/gl_rendertarget.cpp
@@ -21,6 +21,7 @@ void	CRenderTarget::u_setrt(const ref_rt& _1, const ref_rt& _2, const ref_rt& _3
 	dwHeight = _1->dwHeight;
 	GLuint cnt = 0;
 	GLenum buffers[3] = { GL_NONE };
+	RCache.set_FB(HW.pFB);
 	if (_1)
 	{
 		buffers[cnt++] = GL_COLOR_ATTACHMENT0;
@@ -50,6 +51,7 @@ void	CRenderTarget::u_setrt(const ref_rt& _1, const ref_rt& _2, GLuint zb)
 	dwHeight = _1->dwHeight;
 	GLuint cnt = 0;
 	GLenum buffers[2] = { GL_NONE };
+	RCache.set_FB(HW.pFB);
 	if (_1)
 	{
 		buffers[cnt++] = GL_COLOR_ATTACHMENT0;
@@ -73,20 +75,24 @@ void	CRenderTarget::u_setrt(u32 W, u32 H, GLuint _1, GLuint _2, GLuint _3, GLuin
 	dwHeight = H;
 	GLuint cnt = 0;
 	GLenum buffers[3] = { GL_NONE };
-	if (_1 == HW.pBaseRT) buffers[cnt++] = GL_BACK;
-	else if (_1)
+	if (_1 == HW.pBaseRT)
+	{
+		RCache.set_FB();
+		return;
+	}
+
+	RCache.set_FB(HW.pFB);
+	if (_1)
 	{
 		buffers[cnt++] = GL_COLOR_ATTACHMENT0;
 		RCache.set_RT(_1, 0);
 	}
-	if (_2 == HW.pBaseRT) buffers[cnt++] = GL_BACK;
-	else if (_2)
+	if (_2)
 	{
 		buffers[cnt++] = GL_COLOR_ATTACHMENT1;
 		RCache.set_RT(_2, 1);
 	}
-	if (_3 == HW.pBaseRT) buffers[cnt++] = GL_BACK;
-	else if (_3)
+	if (_3)
 	{
 		buffers[cnt++] = GL_COLOR_ATTACHMENT2;
 		RCache.set_RT(_3, 2);
@@ -815,7 +821,7 @@ CRenderTarget::CRenderTarget		()
 				//	Autogen mipmaps
 				glGenTextures(1, &t_noise_surf_mipped);
 				CHK_GL(glBindTexture(GL_TEXTURE_2D, t_noise_surf_mipped));
-				CHK_GL(glTexStorage2D(GL_TEXTURE_2D, 0, GL_RGBA8, TEX_jitter, TEX_jitter));
+				CHK_GL(glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA8, TEX_jitter, TEX_jitter));
 				t_noise_mipped = RImplementation.Resources->_CreateTexture(r2_jitter_mipped);
 				t_noise_mipped->surface_set(GL_TEXTURE_2D, t_noise_surf_mipped);