From 262e8e96b61848bd15e911e2be573886926e3c29 Mon Sep 17 00:00:00 2001
From: James Canete <use.less01@gmail.com>
Date: Tue, 30 Oct 2012 22:05:07 +0000
Subject: [PATCH] Ensure the correct FBO is bound when drawing. (Fixes bug
 #5791.)

---
 code/rend2/tr_backend.c | 18 +++++++++++++-----
 code/rend2/tr_fbo.c     | 24 ++++++++++++++++++++----
 code/rend2/tr_scene.c   |  5 -----
 3 files changed, 33 insertions(+), 14 deletions(-)

diff --git a/code/rend2/tr_backend.c b/code/rend2/tr_backend.c
index 720cf1e9..678f9aa7 100644
--- a/code/rend2/tr_backend.c
+++ b/code/rend2/tr_backend.c
@@ -482,9 +482,17 @@ void RB_BeginDrawingView (void) {
 	if (glRefConfig.framebufferObject)
 	{
 		// FIXME: HUGE HACK: render to the screen fbo if we've already postprocessed the frame and aren't drawing more world
-		if (backEnd.viewParms.targetFbo == tr.renderFbo && backEnd.framePostProcessed && (backEnd.refdef.rdflags & RDF_NOWORLDMODEL))
+		// drawing more world check is in case of double renders, such as skyportals
+		if (backEnd.viewParms.targetFbo == NULL)
 		{
-			FBO_Bind(tr.screenScratchFbo);
+			if (backEnd.framePostProcessed && (backEnd.refdef.rdflags & RDF_NOWORLDMODEL))
+			{
+				FBO_Bind(tr.screenScratchFbo);
+			}
+			else
+			{
+				FBO_Bind(tr.renderFbo);
+			}
 		}
 		else
 		{
@@ -949,7 +957,7 @@ void RE_StretchRaw (int x, int y, int w, int h, int cols, int rows, const byte *
 	}
 
 	// FIXME: HUGE hack
-	if (glRefConfig.framebufferObject && !glState.currentFBO)
+	if (glRefConfig.framebufferObject)
 	{
 		if (backEnd.framePostProcessed)
 		{
@@ -1092,7 +1100,7 @@ const void *RB_StretchPic ( const void *data ) {
 	cmd = (const stretchPicCommand_t *)data;
 
 	// FIXME: HUGE hack
-	if (glRefConfig.framebufferObject && !glState.currentFBO)
+	if (glRefConfig.framebufferObject)
 	{
 		if (backEnd.framePostProcessed)
 		{
@@ -1570,7 +1578,7 @@ const void *RB_ClearDepth(const void *data)
 
 	if (glRefConfig.framebufferObject)
 	{
-		if (backEnd.framePostProcessed && (backEnd.refdef.rdflags & RDF_NOWORLDMODEL))
+		if (backEnd.framePostProcessed)
 		{
 			FBO_Bind(tr.screenScratchFbo);
 		}
diff --git a/code/rend2/tr_fbo.c b/code/rend2/tr_fbo.c
index c3b72e20..04f9ff26 100644
--- a/code/rend2/tr_fbo.c
+++ b/code/rend2/tr_fbo.c
@@ -661,6 +661,8 @@ void FBO_BlitFromTexture(struct image_s *src, vec4i_t inSrcBox, vec2_t inSrcTexS
 	vec2_t texCoords[4];
 	vec2_t invTexRes;
 	FBO_t *oldFbo = glState.currentFBO;
+	matrix_t projection;
+	int width, height;
 
 	if (!src)
 		return;
@@ -726,11 +728,25 @@ void FBO_BlitFromTexture(struct image_s *src, vec4i_t inSrcBox, vec2_t inSrcTexS
 
 	FBO_Bind(dst);
 
-	RB_SetGL2D();
+	if (glState.currentFBO)
+	{
+		width = glState.currentFBO->width;
+		height = glState.currentFBO->height;
+	}
+	else
+	{
+		width = glConfig.vidWidth;
+		height = glConfig.vidHeight;
+	}
 
-	GL_SelectTexture(TB_COLORMAP);
+	qglViewport( 0, 0, width, height );
+	qglScissor( 0, 0, width, height );
 
-	GL_Bind(src);
+	Matrix16Ortho(0, width, height, 0, 0, 1, projection);
+
+	qglDisable( GL_CULL_FACE );
+
+	GL_BindToTMU(src, TB_COLORMAP);
 
 	VectorSet4(quadVerts[0], dstBox[0], dstBox[1], 0, 1);
 	VectorSet4(quadVerts[1], dstBox[2], dstBox[1], 0, 1);
@@ -749,7 +765,7 @@ void FBO_BlitFromTexture(struct image_s *src, vec4i_t inSrcBox, vec2_t inSrcTexS
 
 	GLSL_BindProgram(shaderProgram);
 	
-	GLSL_SetUniformMatrix16(shaderProgram, TEXTURECOLOR_UNIFORM_MODELVIEWPROJECTIONMATRIX, glState.modelviewProjection);
+	GLSL_SetUniformMatrix16(shaderProgram, TEXTURECOLOR_UNIFORM_MODELVIEWPROJECTIONMATRIX, projection);
 	GLSL_SetUniformVec4(shaderProgram, TEXTURECOLOR_UNIFORM_COLOR, color);
 	GLSL_SetUniformVec2(shaderProgram, TEXTURECOLOR_UNIFORM_INVTEXRES, invTexRes);
 	GLSL_SetUniformVec2(shaderProgram, TEXTURECOLOR_UNIFORM_AUTOEXPOSUREMINMAX, tr.refdef.autoExposureMinMax);
diff --git a/code/rend2/tr_scene.c b/code/rend2/tr_scene.c
index eb58481e..f134c997 100644
--- a/code/rend2/tr_scene.c
+++ b/code/rend2/tr_scene.c
@@ -507,11 +507,6 @@ void RE_RenderScene( const refdef_t *fd ) {
 	
 	parms.stereoFrame = tr.refdef.stereoFrame;
 
-	if (glRefConfig.framebufferObject)
-	{
-		parms.targetFbo = tr.renderFbo;
-	}
-
 	VectorCopy( fd->vieworg, parms.or.origin );
 	VectorCopy( fd->viewaxis[0], parms.or.axis[0] );
 	VectorCopy( fd->viewaxis[1], parms.or.axis[1] );