From a55083037917654b7acc931b81d509873eb802ca Mon Sep 17 00:00:00 2001
From: Lee Salzman <lsalzman@gmail.com>
Date: Wed, 14 May 2008 21:39:49 +0000
Subject: [PATCH] disable water reflections on pre-DX8ish hardware by default

git-svn-id: svn://svn.code.sf.net/p/actiongame/code/trunk/ac@1971 e016b1c5-ed68-44aa-a2f7-31cac88cffde
---
 source/src/main.cpp     |  2 +-
 source/src/menus.cpp    |  4 +--
 source/src/protos.h     |  1 +
 source/src/rendergl.cpp | 56 ++++++++++++++++++++++++-----------------
 4 files changed, 37 insertions(+), 26 deletions(-)

diff --git a/source/src/main.cpp b/source/src/main.cpp
index 93bf857d..a40bba8a 100644
--- a/source/src/main.cpp
+++ b/source/src/main.cpp
@@ -504,7 +504,7 @@ int main(int argc, char **argv)
     SDL_ShowCursor(0);
 
     initlog("gl");
-
+    gl_checkextensions();
     gl_init(scr_w, scr_h, usedcolorbits, useddepthbits, usedfsaa);
     
     notexture = textureload("packages/misc/notexture.png");
diff --git a/source/src/menus.cpp b/source/src/menus.cpp
index ac9305f9..d387dc8d 100644
--- a/source/src/menus.cpp
+++ b/source/src/menus.cpp
@@ -155,7 +155,7 @@ struct mitemtextinput : mitemtext
     mitemtextinput(gmenu *parent, char *text, char *value, char *action, char *hoveraction, color *bgcolor) : mitemtext(parent, text, action, hoveraction, bgcolor), defaultvalueexp(value), modified(false)
     {
         s_strcpy(input.buf, value);
-    };
+    }
 
     virtual int width() { return text_width(input.buf) + text_width(text); }
 
@@ -194,7 +194,7 @@ struct mitemtextinput : mitemtext
         modified = false;
     }
     
-    virtual void select() { };
+    virtual void select() { }
 
     void setdefaultvalue()
     {
diff --git a/source/src/protos.h b/source/src/protos.h
index a3454b57..f736bdf0 100644
--- a/source/src/protos.h
+++ b/source/src/protos.h
@@ -182,6 +182,7 @@ extern serverinfo *getconnectedserverinfo();
 extern void pingservers();
 
 // rendergl
+extern void gl_checkextensions();
 extern void gl_init(int w, int h, int bpp, int depth, int fsaa);
 extern void cleangl();
 extern void line(int x1, int y1, float z1, int x2, int y2, float z2);
diff --git a/source/src/rendergl.cpp b/source/src/rendergl.cpp
index 384820c6..24884aba 100644
--- a/source/src/rendergl.cpp
+++ b/source/src/rendergl.cpp
@@ -21,30 +21,8 @@ void *getprocaddress(const char *name)
     return SDL_GL_GetProcAddress(name);
 }
 
-void gl_init(int w, int h, int bpp, int depth, int fsaa)
+void gl_checkextensions()
 {
-    //#define fogvalues 0.5f, 0.6f, 0.7f, 1.0f
-
-    glViewport(0, 0, w, h);
-    glClearDepth(1.0);
-    glDepthFunc(GL_LESS);
-    glEnable(GL_DEPTH_TEST);
-    glShadeModel(GL_SMOOTH);
-    
-    
-    glEnable(GL_FOG);
-    glFogi(GL_FOG_MODE, GL_LINEAR);
-    glFogf(GL_FOG_DENSITY, 0.25);
-    glHint(GL_FOG_HINT, GL_NICEST);
-    
-
-    glEnable(GL_LINE_SMOOTH);
-    glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);
-    glPolygonOffset(-3.0, -3.0);
-
-    glCullFace(GL_FRONT);
-    glEnable(GL_CULL_FACE);
-
     const char *vendor = (const char *)glGetString(GL_VENDOR);
     const char *exts = (const char *)glGetString(GL_EXTENSIONS);
     const char *renderer = (const char *)glGetString(GL_RENDERER);
@@ -71,6 +49,38 @@ void gl_init(int w, int h, int bpp, int depth, int fsaa)
         hasMDA = true;
     }
 
+    if(!strstr(exts, "GL_EXT_fragment_program"))
+    {
+        // not a required extension, but ensures the card has enough power to do reflections
+        extern int waterreflect, waterrefract;
+        waterreflect = waterrefract = 0;
+    }
+}
+
+void gl_init(int w, int h, int bpp, int depth, int fsaa)
+{
+    //#define fogvalues 0.5f, 0.6f, 0.7f, 1.0f
+
+    glViewport(0, 0, w, h);
+    glClearDepth(1.0);
+    glDepthFunc(GL_LESS);
+    glEnable(GL_DEPTH_TEST);
+    glShadeModel(GL_SMOOTH);
+    
+    
+    glEnable(GL_FOG);
+    glFogi(GL_FOG_MODE, GL_LINEAR);
+    glFogf(GL_FOG_DENSITY, 0.25);
+    glHint(GL_FOG_HINT, GL_NICEST);
+    
+
+    glEnable(GL_LINE_SMOOTH);
+    glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);
+    glPolygonOffset(-3.0, -3.0);
+
+    glCullFace(GL_FRONT);
+    glEnable(GL_CULL_FACE);
+
     if(fsaa) glEnable(GL_MULTISAMPLE);
 
     inittmus();