From 637aa9d77e8b0abce6b49b0ca4d085fe370fb8df Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <coelckers@zdoom.fake>
Date: Sat, 26 Jul 2014 18:43:54 +0200
Subject: [PATCH] - some adjustments to allow testing the different rendering
 methods.

---
 src/gl/system/gl_cvars.h       |  1 -
 src/gl/system/gl_interface.cpp |  7 ++++++-
 wadsrc/static/menudef.z        | 17 +++++++++--------
 3 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/src/gl/system/gl_cvars.h b/src/gl/system/gl_cvars.h
index d0e18bca4..567d9f85f 100644
--- a/src/gl/system/gl_cvars.h
+++ b/src/gl/system/gl_cvars.h
@@ -38,7 +38,6 @@ EXTERN_CVAR(Bool,gl_mirrors)
 EXTERN_CVAR(Bool,gl_mirror_envmap)
 EXTERN_CVAR(Bool, gl_render_segs)
 EXTERN_CVAR(Bool, gl_seamless)
-EXTERN_CVAR(Bool, gl_dynlight_shader)
 
 EXTERN_CVAR(Float, gl_mask_threshold)
 EXTERN_CVAR(Float, gl_mask_sprite_threshold)
diff --git a/src/gl/system/gl_interface.cpp b/src/gl/system/gl_interface.cpp
index 0b1e88548..72d5a457b 100644
--- a/src/gl/system/gl_interface.cpp
+++ b/src/gl/system/gl_interface.cpp
@@ -52,6 +52,7 @@ RenderContext gl;
 
 int occlusion_type=0;
 
+CVAR(Bool, gl_persistent_avail, false, CVAR_NOSET);
 
 //==========================================================================
 //
@@ -132,7 +133,11 @@ void gl_LoadExtensions()
 
 	if (CheckExtension("GL_ARB_texture_compression")) gl.flags|=RFL_TEXTURE_COMPRESSION;
 	if (CheckExtension("GL_EXT_texture_compression_s3tc")) gl.flags|=RFL_TEXTURE_COMPRESSION_S3TC;
-	if (CheckExtension("GL_ARB_buffer_storage")) gl.flags |= RFL_BUFFER_STORAGE;
+	if (CheckExtension("GL_ARB_buffer_storage") && !Args->CheckParm("-nopersistentbuffers"))
+	{
+		gl.flags |= RFL_BUFFER_STORAGE;	// the cmdline option is for testing the fallback implementation on newer hardware.
+		gl_persistent_avail = true;
+	}
 	if (CheckExtension("GL_ARB_separate_shader_objects")) gl.flags |= RFL_SEPARATE_SHADER_OBJECTS;
 	if (!CheckExtension("GL_ARB_compatibility")) gl.flags |= RFL_COREPROFILE;
 	
diff --git a/wadsrc/static/menudef.z b/wadsrc/static/menudef.z
index 0db780620..e448e42d9 100644
--- a/wadsrc/static/menudef.z
+++ b/wadsrc/static/menudef.z
@@ -105,12 +105,6 @@ OptionValue "HqResizeModes"
    6, "hq4x"
 }
 
-OptionValue "HqResizeTargets"
-{
-   0, "Everything"
-   1, "Sprites/fonts"
-}
- 
 OptionValue "FogMode"
 {
 	0, "Off"
@@ -130,6 +124,14 @@ OptionValue "FuzzStyle"
 	//5, "Jagged fuzz" I can't see any difference between this and 4 so it's disabled for now.
 }
 
+OptionValue "RenderMethods"
+{
+	0, "Immediate mode"
+	1, "Uniform array"
+	2, "Buffer upload"
+	3, "Mapped buffer"
+}
+
 OptionMenu "GLTextureGLOptions"
 {
 	Title "TEXTURE OPTIONS"
@@ -158,7 +160,6 @@ OptionMenu "GLLightOptions"
 	Option "Force additive lighting",	gl_lights_additive,				"YesNo"
 	Slider "Light intensity",			gl_lights_intensity, 			0.0, 1.0, 0.1
 	Slider "Light size",				gl_lights_size,					0.0, 2.0, 0.1
-	Option "Use shaders for lights",	gl_dynlight_shader,				"YesNo"
 }
 
 OptionMenu "GLPrefOptions"
@@ -179,7 +180,7 @@ OptionMenu "GLPrefOptions"
 	Option "Particle style",			gl_particles_style,				"Particles"
 	Slider "Ambient light level",		gl_light_ambient,				1.0, 255.0, 5.0
 	Option "Rendering quality",			gl_render_precise,				"Precision"
-	Option "Use vertex buffer",			gl_usevbo,						"OnOff"
+	Option "Render method",				gl_rendermethod,				"RenderMethods", 	"gl_persistent_avail"
 }
 
 OptionMenu "OpenGLOptions"