From c7b6ebaf762ba9bcdf64c6bc3b1e0fb81356c5b2 Mon Sep 17 00:00:00 2001
From: Merov Linden <merov@lindenlab.com>
Date: Thu, 30 Sep 2010 22:57:05 -0700
Subject: Port of SNOW-643 : Water flicker at high altitude. This doesn't fix
 the low altitude flicker though (STORM-306)

---
 indra/llrender/llgl.cpp | 26 +++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

(limited to 'indra/llrender/llgl.cpp')

diff --git a/indra/llrender/llgl.cpp b/indra/llrender/llgl.cpp
index c0edd92bc1..096e8e07ab 100644
--- a/indra/llrender/llgl.cpp
+++ b/indra/llrender/llgl.cpp
@@ -610,41 +610,46 @@ void LLGLManager::shutdownGL()
 void LLGLManager::initExtensions()
 {
 #if LL_MESA_HEADLESS
-# if GL_ARB_multitexture
+# ifdef GL_ARB_multitexture
 	mHasMultitexture = TRUE;
 # else
 	mHasMultitexture = FALSE;
 # endif
-# if GL_ARB_texture_env_combine
+# ifdef GL_ARB_texture_env_combine
 	mHasARBEnvCombine = TRUE;	
 # else
 	mHasARBEnvCombine = FALSE;
 # endif
-# if GL_ARB_texture_compression
+# ifdef GL_ARB_texture_compression
 	mHasCompressedTextures = TRUE;
 # else
 	mHasCompressedTextures = FALSE;
 # endif
-# if GL_ARB_vertex_buffer_object
+# ifdef GL_ARB_vertex_buffer_object
 	mHasVertexBufferObject = TRUE;
 # else
 	mHasVertexBufferObject = FALSE;
 # endif
-# if GL_EXT_framebuffer_object
+# ifdef GL_EXT_framebuffer_object
 	mHasFramebufferObject = TRUE;
 # else
 	mHasFramebufferObject = FALSE;
 # endif
-# if GL_EXT_framebuffer_multisample
+# ifdef GL_EXT_framebuffer_multisample
 	mHasFramebufferMultisample = TRUE;
 # else
 	mHasFramebufferMultisample = FALSE;
 # endif
-# if GL_ARB_draw_buffers
+# ifdef GL_ARB_draw_buffers
 	mHasDrawBuffers = TRUE;
 #else
 	mHasDrawBuffers = FALSE;
 # endif
+# if defined(GL_NV_depth_clamp) || defined(GL_ARB_depth_clamp)
+	mHasDepthClamp = TRUE;
+#else
+	mHasDepthClamp = FALSE;
+#endif
 # if GL_EXT_blend_func_separate
 	mHasBlendFuncSeparate = TRUE;
 #else
@@ -671,6 +676,7 @@ void LLGLManager::initExtensions()
 	mHasCompressedTextures = glh_init_extensions("GL_ARB_texture_compression");
 	mHasOcclusionQuery = ExtensionExists("GL_ARB_occlusion_query", gGLHExts.mSysExts);
 	mHasVertexBufferObject = ExtensionExists("GL_ARB_vertex_buffer_object", gGLHExts.mSysExts);
+	mHasDepthClamp = ExtensionExists("GL_ARB_depth_clamp", gGLHExts.mSysExts) || ExtensionExists("GL_NV_depth_clamp", gGLHExts.mSysExts);
 	// mask out FBO support when packed_depth_stencil isn't there 'cause we need it for LLRenderTarget -Brad
 	mHasFramebufferObject = ExtensionExists("GL_EXT_framebuffer_object", gGLHExts.mSysExts)
 		&& ExtensionExists("GL_EXT_packed_depth_stencil", gGLHExts.mSysExts);
@@ -694,6 +700,7 @@ void LLGLManager::initExtensions()
 	if (getenv("LL_GL_NOEXT"))
 	{
 		//mHasMultitexture = FALSE; // NEEDED!
+		mHasDepthClamp = FALSE;
 		mHasARBEnvCombine = FALSE;
 		mHasCompressedTextures = FALSE;
 		mHasVertexBufferObject = FALSE;
@@ -755,6 +762,7 @@ void LLGLManager::initExtensions()
 		if (strchr(blacklist,'s')) mHasFramebufferMultisample = FALSE;
 		if (strchr(blacklist,'t')) mHasTextureRectangle = FALSE;
 		if (strchr(blacklist,'u')) mHasBlendFuncSeparate = FALSE;//S
+		if (strchr(blacklist,'v')) mHasDepthClamp = FALSE;
 		
 	}
 #endif // LL_LINUX || LL_SOLARIS
@@ -2037,7 +2045,7 @@ void LLGLDepthTest::checkState()
 	}
 }
 
-LLGLClampToFarClip::LLGLClampToFarClip(glh::matrix4f P)
+LLGLSquashToFarClip::LLGLSquashToFarClip(glh::matrix4f P)
 {
 	for (U32 i = 0; i < 4; i++)
 	{
@@ -2050,7 +2058,7 @@ LLGLClampToFarClip::LLGLClampToFarClip(glh::matrix4f P)
 	glMatrixMode(GL_MODELVIEW);
 }
 
-LLGLClampToFarClip::~LLGLClampToFarClip()
+LLGLSquashToFarClip::~LLGLSquashToFarClip()
 {
 	glMatrixMode(GL_PROJECTION);
 	glPopMatrix();
-- 
cgit v1.2.3


From 4809142acce5ed66579184dca4fa6e4cdb7bfeed Mon Sep 17 00:00:00 2001
From: Xiaohong Bao <bao@lindenlab.com>
Date: Tue, 12 Oct 2010 15:35:39 -0600
Subject: add a debug function to output gl error information to the log file
 without crashing the viewer. No need to test because there are no negative
 effects.

---
 indra/llrender/llgl.cpp | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

(limited to 'indra/llrender/llgl.cpp')

diff --git a/indra/llrender/llgl.cpp b/indra/llrender/llgl.cpp
index c0edd92bc1..c2e9740372 100644
--- a/indra/llrender/llgl.cpp
+++ b/indra/llrender/llgl.cpp
@@ -1047,6 +1047,33 @@ void flush_glerror()
 	glGetError();
 }
 
+//this function outputs gl error to the log file, does not crash the code.
+void log_glerror()
+{
+	if (LL_UNLIKELY(!gGLManager.mInited))
+	{
+		return ;
+	}
+	//  Create or update texture to be used with this data 
+	GLenum error;
+	error = glGetError();
+	while (LL_UNLIKELY(error))
+	{
+		GLubyte const * gl_error_msg = gluErrorString(error);
+		if (NULL != gl_error_msg)
+		{
+			llwarns << "GL Error: " << error << " GL Error String: " << gl_error_msg << llendl ;			
+		}
+		else
+		{
+			// gluErrorString returns NULL for some extensions' error codes.
+			// you'll probably have to grep for the number in glext.h.
+			llwarns << "GL Error: UNKNOWN 0x" << std::hex << error << std::dec << llendl;
+		}
+		error = glGetError();
+	}
+}
+
 void do_assert_glerror()
 {
 	if (LL_UNLIKELY(!gGLManager.mInited))
-- 
cgit v1.2.3