From f08610b6c828751f54fd7ba724e8bdfc892edaf1 Mon Sep 17 00:00:00 2001
From: plagman <plagman@1a8010ca-5511-0410-912e-c29ae57300e0>
Date: Mon, 3 Oct 2011 00:14:56 +0000
Subject: [PATCH] Polymer: support for creating a debugging context in winlayer

This also fixes a warning when building for Windows.

git-svn-id: https://svn.eduke32.com/eduke32@2067 1a8010ca-5511-0410-912e-c29ae57300e0
---
 polymer/eduke32/build/include/glbuild.h |  1 +
 polymer/eduke32/build/include/polymer.h |  2 +-
 polymer/eduke32/build/src/glbuild.c     |  2 ++
 polymer/eduke32/build/src/polymer.c     |  2 +-
 polymer/eduke32/build/src/winlayer.c    | 31 +++++++++++++++++++++----
 5 files changed, 32 insertions(+), 6 deletions(-)

diff --git a/polymer/eduke32/build/include/glbuild.h b/polymer/eduke32/build/include/glbuild.h
index 53c0ebe3e..b92033337 100644
--- a/polymer/eduke32/build/include/glbuild.h
+++ b/polymer/eduke32/build/include/glbuild.h
@@ -319,6 +319,7 @@ extern int32_t (WINAPI * bwglDescribePixelFormat)(HDC,int32_t,UINT,LPPIXELFORMAT
 extern int32_t (WINAPI * bwglGetPixelFormat)(HDC);
 extern BOOL (WINAPI * bwglSetPixelFormat)(HDC,int32_t,const PIXELFORMATDESCRIPTOR*);
 extern BOOL (WINAPI * bwglSwapIntervalEXT)(int32_t);
+extern HGLRC (WINAPI * bwglCreateContextAttribsARB)(HDC hDC, HGLRC hShareContext, const int *attribList);
 #endif
 
 //////// glGenTextures/glDeleteTextures debugging ////////
diff --git a/polymer/eduke32/build/include/polymer.h b/polymer/eduke32/build/include/polymer.h
index 729409df4..5911d0320 100644
--- a/polymer/eduke32/build/include/polymer.h
+++ b/polymer/eduke32/build/include/polymer.h
@@ -373,7 +373,7 @@ static void         polymer_prepareshadows(void);
 // RENDER TARGETS
 static void         polymer_initrendertargets(int32_t count);
 // DEBUG OUTPUT
-static void         polymer_debugoutputcallback(GLenum source,GLenum type,GLuint id,GLenum severity,GLsizei length,const GLchar *message,GLvoid *userParam);
+void PR_CALLBACK    polymer_debugoutputcallback(GLenum source,GLenum type,GLuint id,GLenum severity,GLsizei length,const GLchar *message,GLvoid *userParam);
 
 #define INDICE(n) ((p->indices) ? (p->indices[(i+n)%p->indicescount]*5) : (((i+n)%p->vertcount)*5))
 
diff --git a/polymer/eduke32/build/src/glbuild.c b/polymer/eduke32/build/src/glbuild.c
index 12dfec7bc..1a2448d0d 100644
--- a/polymer/eduke32/build/src/glbuild.c
+++ b/polymer/eduke32/build/src/glbuild.c
@@ -287,6 +287,7 @@ int32_t (WINAPI *bwglDescribePixelFormat)(HDC,int32_t,UINT,LPPIXELFORMATDESCRIPT
 int32_t (WINAPI *bwglGetPixelFormat)(HDC);
 BOOL (WINAPI *bwglSetPixelFormat)(HDC,int32_t,const PIXELFORMATDESCRIPTOR *);
 BOOL (WINAPI *bwglSwapIntervalEXT)(int32_t);
+HGLRC (WINAPI * bwglCreateContextAttribsARB)(HDC hDC, HGLRC hShareContext, const int *attribList);
 
 static HANDLE hGLDLL, hGLUDLL;
 #else
@@ -625,6 +626,7 @@ int32_t loadglextensions(void)
 
 #ifdef RENDERTYPEWIN
     bwglSwapIntervalEXT	    = GETPROCEXTSOFT("wglSwapIntervalEXT");
+    bwglCreateContextAttribsARB = GETPROCEXTSOFT("wglCreateContextAttribsARB");
 #endif
     return err;
 }
diff --git a/polymer/eduke32/build/src/polymer.c b/polymer/eduke32/build/src/polymer.c
index c04708805..4a3310a57 100644
--- a/polymer/eduke32/build/src/polymer.c
+++ b/polymer/eduke32/build/src/polymer.c
@@ -5662,7 +5662,7 @@ static void         polymer_initrendertargets(int32_t count)
 }
 
 // DEBUG OUTPUT
-void                polymer_debugoutputcallback(GLenum source,GLenum type,GLuint id,GLenum severity,GLsizei length,const GLchar *message,GLvoid *userParam)
+void PR_CALLBACK    polymer_debugoutputcallback(GLenum source,GLenum type,GLuint id,GLenum severity,GLsizei length,const GLchar *message,GLvoid *userParam)
 {
     UNREFERENCED_PARAMETER(source);
     UNREFERENCED_PARAMETER(type);
diff --git a/polymer/eduke32/build/src/winlayer.c b/polymer/eduke32/build/src/winlayer.c
index 4ed62e5fb..86fbadf2e 100644
--- a/polymer/eduke32/build/src/winlayer.c
+++ b/polymer/eduke32/build/src/winlayer.c
@@ -2803,6 +2803,7 @@ static int32_t SetupOpenGL(int32_t width, int32_t height, int32_t bitspp)
     }
 
     hGLRC = bwglCreateContext(hDC);
+
     if (!hGLRC)
     {
         ReleaseOpenGL();
@@ -2817,6 +2818,32 @@ static int32_t SetupOpenGL(int32_t width, int32_t height, int32_t bitspp)
         return TRUE;
     }
 
+    loadglextensions();
+
+    // We should really be checking for the new WGL extension string instead
+    // Enable this to leverage ARB_debug_output
+    if (bwglCreateContextAttribsARB && 0) {
+        HGLRC debuggingContext = hGLRC;
+
+        // This corresponds to WGL_CONTEXT_FLAGS_ARB set to WGL_CONTEXT_DEBUG_BIT_ARB
+        // I'm too lazy to get a new wglext.h
+        int attribs[] = {
+            0x2094, 0x1,
+            0
+        };
+
+        debuggingContext = bwglCreateContextAttribsARB(hDC, NULL, attribs);
+
+        if (debuggingContext) {
+            bwglDeleteContext(hGLRC);
+            bwglMakeCurrent(hDC, debuggingContext);
+            hGLRC = debuggingContext;
+
+            // This should be able to get the ARB_debug_output symbols
+            loadglextensions();
+        }
+    }
+
     polymost_glreset();
 
     bglEnable(GL_TEXTURE_2D);
@@ -3234,10 +3261,6 @@ static BOOL CreateAppWindow(int32_t modenum)
         }
     }
 
-#ifdef USE_OPENGL
-    if (bitspp > 8) loadglextensions();
-#endif
-
     xres = width;
     yres = height;
     bpp = bitspp;