From b2062dd91f75bfece12bd474aedd69e6363ea19e Mon Sep 17 00:00:00 2001
From: Glenn Maynard <gmaynard@users.sourceforge.net>
Date: Wed, 22 Jan 2003 22:41:05 +0000
Subject: [PATCH] add paletted texture entry points remove texture compression
 ones

---
 stepmania/src/RageDisplay.cpp       | 19 ++++++++++++++++---
 stepmania/src/RageDisplay.h         |  1 +
 stepmania/src/RageDisplayInternal.h |  9 +++++++--
 3 files changed, 24 insertions(+), 5 deletions(-)

diff --git a/stepmania/src/RageDisplay.cpp b/stepmania/src/RageDisplay.cpp
index ff971be4ef..2bdb640af3 100644
--- a/stepmania/src/RageDisplay.cpp
+++ b/stepmania/src/RageDisplay.cpp
@@ -49,6 +49,8 @@ static int			g_iFramesRenderedSinceLastCheck,
 					g_iNumChecksSinceLastReset;
 
 PWSWAPINTERVALEXTPROC GLExt::wglSwapIntervalEXT;
+PFNGLCOLORTABLEPROC GLExt::glColorTableEXT;
+PFNGLCOLORTABLEPARAMETERIVPROC GLExt::glGetColorTableParameterivEXT;
 
 /* We don't actually use normals (we don't tunr on lighting), there's just
  * no GL_T2F_C4F_V3F. */
@@ -155,16 +157,22 @@ void RageDisplay::SetupExtensions()
 
 	/* Check for extensions: */
 	m_oglspecs->EXT_texture_env_combine = HasExtension("GL_EXT_texture_env_combine");
-	m_oglspecs->ARB_texture_compression = HasExtension("GL_ARB_texture_compression");
-	m_oglspecs->EXT_texture_compression_s3tc = HasExtension("GL_EXT_texture_compression_s3tc");
 	m_oglspecs->WGL_EXT_swap_control = HasExtension("WGL_EXT_swap_control");
+	m_oglspecs->EXT_paletted_texture = HasExtension("GL_EXT_paletted_texture");
 
 	/* Find extension functions. */
 	wglSwapIntervalEXT = (PWSWAPINTERVALEXTPROC) SDL_GL_GetProcAddress("wglSwapIntervalEXT");
-	
+	glColorTableEXT = (PFNGLCOLORTABLEPROC) SDL_GL_GetProcAddress("glColorTableEXT");
+	glGetColorTableParameterivEXT = (PFNGLCOLORTABLEPARAMETERIVPROC) SDL_GL_GetProcAddress("glGetColorTableParameterivEXT");
+
 	/* Make sure we have all components for detected extensions. */
 	if(m_oglspecs->WGL_EXT_swap_control)
 		ASSERT(wglSwapIntervalEXT);
+	if(m_oglspecs->EXT_paletted_texture)
+	{
+		ASSERT(glColorTableEXT);
+		ASSERT(glGetColorTableParameterivEXT);
+	}
 }
 
 /* Set the video mode.  In some cases, changing the video mode will reset
@@ -338,6 +346,11 @@ void RageDisplay::ResetStats()
 	g_LastCheckTimer.GetDeltaTime();
 }
 
+void RageDisplay::DisablePalettedTexture()
+{
+	m_oglspecs->EXT_paletted_texture = false;
+}
+
 bool RageDisplay::IsWindowed() const 
 {
 	return true; // FIXME
diff --git a/stepmania/src/RageDisplay.h b/stepmania/src/RageDisplay.h
index 3bdcb0fb7d..0e10518fb7 100644
--- a/stepmania/src/RageDisplay.h
+++ b/stepmania/src/RageDisplay.h
@@ -85,6 +85,7 @@ public:
 	void ResetStats();
 
 	const oglspecs_t &GetSpecs() const { return *m_oglspecs; }
+	void DisablePalettedTexture();
 
 protected:
 	void AddVerts( const RageVertex v[], int iNumVerts );
diff --git a/stepmania/src/RageDisplayInternal.h b/stepmania/src/RageDisplayInternal.h
index efc2722357..eaf02113a2 100644
--- a/stepmania/src/RageDisplayInternal.h
+++ b/stepmania/src/RageDisplayInternal.h
@@ -15,6 +15,10 @@
 
 #include "glext.h"
 
+/* Windows's broken gl.h defines GL_EXT_paletted_texture incompletely: */
+#ifndef GL_TEXTURE_INDEX_SIZE_EXT
+#define GL_TEXTURE_INDEX_SIZE_EXT         0x80ED
+#endif
 #include <set>
 
 /* Not in glext.h: */
@@ -38,14 +42,15 @@ struct oglspecs_t {
 	/* Which extensions we actually use are supported: */
 	bool EXT_texture_env_combine,
 		 WGL_EXT_swap_control,
-		 ARB_texture_compression,
-		 EXT_texture_compression_s3tc;
+		 EXT_paletted_texture;
 };
 
 /* Extension functions we use.  Put these in a namespace instead of in oglspecs_t,
  * so they can be called like regular functions. */
 namespace GLExt {
 	extern PWSWAPINTERVALEXTPROC wglSwapIntervalEXT;
+	extern PFNGLCOLORTABLEPROC glColorTableEXT;
+	extern PFNGLCOLORTABLEPARAMETERIVPROC glGetColorTableParameterivEXT;
 };
 using namespace GLExt;