sdl12-compat: OpenGL logical scaling: specify a stencil attachment.

SDL Commits
1 
From 0c2c8d6e5173bae89997dd5207eab877ed086621 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Thu, 3 Jun 2021 15:36:21 -0400
Subject: [PATCH] OpenGL logical scaling: specify a stencil attachment.

Corrects wrong object glow rendering in Psychonauts.

Fixes #62.
---
 src/SDL12_compat.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/SDL12_compat.c b/src/SDL12_compat.c
index 258397e..02a5170 100644
--- a/src/SDL12_compat.c
+++ b/src/SDL12_compat.c
@@ -3525,6 +3525,7 @@ InitializeOpenGLScaling(const int w, const int h)
     OpenGLFuncs.glBindRenderbuffer(GL_RENDERBUFFER, OpenGLLogicalScalingDepth);
     OpenGLFuncs.glRenderbufferStorageMultisample(GL_RENDERBUFFER, OpenGLLogicalScalingSamples, GL_DEPTH24_STENCIL8, w, h);
     OpenGLFuncs.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, OpenGLLogicalScalingDepth);
+    OpenGLFuncs.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, OpenGLLogicalScalingDepth);
     OpenGLFuncs.glBindRenderbuffer(GL_RENDERBUFFER, 0);
 
     if ( (OpenGLFuncs.glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) || OpenGLFuncs.glGetError() ) {
@@ -3545,8 +3546,9 @@ InitializeOpenGLScaling(const int w, const int h)
         OpenGLFuncs.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, OpenGLLogicalScalingMultisampleColor);
         OpenGLFuncs.glGenRenderbuffers(1, &OpenGLLogicalScalingMultisampleDepth);
         OpenGLFuncs.glBindRenderbuffer(GL_RENDERBUFFER, OpenGLLogicalScalingMultisampleDepth);
-        OpenGLFuncs.glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, w, h);  /* !!! FIXME: is an extension (or core 3.0) */
+        OpenGLFuncs.glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, w, h);  FIXME("is an extension (or core 3.0)?");
         OpenGLFuncs.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, OpenGLLogicalScalingMultisampleDepth);
+        OpenGLFuncs.glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, OpenGLLogicalScalingMultisampleDepth);
         OpenGLFuncs.glBindRenderbuffer(GL_RENDERBUFFER, 0);
 
         if ( (OpenGLFuncs.glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) || OpenGLFuncs.glGetError() ) {