From b9714ba85ebabdc39191565a26d732a82fd9a4a0 Mon Sep 17 00:00:00 2001
From: "Nyx (Neal Orman)" <nyx@lindenlab.com>
Date: Thu, 18 Oct 2012 15:00:05 -0400
Subject: Setting alpha rejection settings properly for texture bakes without
 basic shaders enabled

---
 indra/llappearance/lltexlayer.cpp | 90 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 86 insertions(+), 4 deletions(-)

(limited to 'indra')

diff --git a/indra/llappearance/lltexlayer.cpp b/indra/llappearance/lltexlayer.cpp
index 6e2623b860..b8c8228f85 100644
--- a/indra/llappearance/lltexlayer.cpp
+++ b/indra/llappearance/lltexlayer.cpp
@@ -153,6 +153,10 @@ BOOL LLTexLayerSetBuffer::renderTexLayerSet()
 		gAlphaMaskProgram.bind();
 		gAlphaMaskProgram.setMinimumAlpha(0.004f);
 	}
+	else
+	{
+		glAlphaFunc(GL_GEQUAL, 0.004f);
+	}
 
 	LLVertexBuffer::unbind();
 
@@ -400,6 +404,11 @@ BOOL LLTexLayerSet::render( S32 x, S32 y, S32 width, S32 height )
 		{
 			gAlphaMaskProgram.setMinimumAlpha(0.0f);
 		}
+		else
+		{
+			glAlphaFunc(GL_GEQUAL, 0.0f);
+		}
+
 		gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
 		gGL.color4f( 0.f, 0.f, 0.f, 1.f );
 
@@ -410,6 +419,10 @@ BOOL LLTexLayerSet::render( S32 x, S32 y, S32 width, S32 height )
 		{
 			gAlphaMaskProgram.setMinimumAlpha(0.004f);
 		}
+		else
+		{
+			glAlphaFunc(GL_GEQUAL, 0.004f);
+		}
 	}
 
 	if (mIsVisible)
@@ -440,6 +453,10 @@ BOOL LLTexLayerSet::render( S32 x, S32 y, S32 width, S32 height )
 		{
 			gAlphaMaskProgram.setMinimumAlpha(0.f);
 		}
+		else
+		{
+			glAlphaFunc(GL_GEQUAL, 0.0f);
+		}
 
 		gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
 		gGL.color4f( 0.f, 0.f, 0.f, 0.f );
@@ -452,6 +469,11 @@ BOOL LLTexLayerSet::render( S32 x, S32 y, S32 width, S32 height )
 		{
 			gAlphaMaskProgram.setMinimumAlpha(0.004f);
 		}
+		else
+		{
+			glAlphaFunc(GL_GEQUAL, 0.004f);
+		}
+
 	}
 
 	return success;
@@ -568,6 +590,11 @@ void LLTexLayerSet::renderAlphaMaskTextures(S32 x, S32 y, S32 width, S32 height,
 		{
 			gAlphaMaskProgram.setMinimumAlpha(0.f);
 		}
+		else
+		{
+			glAlphaFunc(GL_GEQUAL, 0.0f);
+		}
+
 		gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
 		gGL.color4f( 0.f, 0.f, 0.f, 1.f );
 		
@@ -578,6 +605,11 @@ void LLTexLayerSet::renderAlphaMaskTextures(S32 x, S32 y, S32 width, S32 height,
 		{
 			gAlphaMaskProgram.setMinimumAlpha(0.004f);
 		}
+		else
+		{
+			glAlphaFunc(GL_GEQUAL, 0.004f);
+		}
+
 	}
 	
 	// (Optional) Mask out part of the baked texture with alpha masks
@@ -1171,9 +1203,16 @@ BOOL LLTexLayer::render(S32 x, S32 y, S32 width, S32 height)
 				{
 					bool no_alpha_test = getInfo()->mWriteAllChannels;
 					LLGLDisable alpha_test(no_alpha_test ? GL_ALPHA_TEST : 0);
-					if (use_shaders && no_alpha_test)
+					if (no_alpha_test)
 					{
-						gAlphaMaskProgram.setMinimumAlpha(0.f);
+						if (use_shaders)
+						{
+							gAlphaMaskProgram.setMinimumAlpha(0.f);
+						}
+						else
+						{
+							glAlphaFunc(GL_GEQUAL, 0.0f);
+						}
 					}
 					
 					LLTexUnit::eTextureAddressMode old_mode = tex->getAddressMode();
@@ -1185,9 +1224,16 @@ BOOL LLTexLayer::render(S32 x, S32 y, S32 width, S32 height)
 
 					gGL.getTexUnit(0)->setTextureAddressMode(old_mode);
 					gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
-					if (use_shaders && no_alpha_test)
+					if (no_alpha_test)
 					{
-						gAlphaMaskProgram.setMinimumAlpha(0.004f);
+						if (use_shaders)
+						{
+							gAlphaMaskProgram.setMinimumAlpha(0.004f);
+						}
+						else
+						{
+							glAlphaFunc(GL_GEQUAL, 0.004f);
+						}
 					}
 					
 				}
@@ -1226,6 +1272,11 @@ BOOL LLTexLayer::render(S32 x, S32 y, S32 width, S32 height)
 		{
 			gAlphaMaskProgram.setMinimumAlpha(0.f);
 		}
+		else
+		{
+			glAlphaFunc(GL_GEQUAL, 0.0f);
+		}
+
 		gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
 		gGL.color4fv( net_color.mV );
 		gl_rect_2d_simple( width, height );
@@ -1233,6 +1284,10 @@ BOOL LLTexLayer::render(S32 x, S32 y, S32 width, S32 height)
 		{
 			gAlphaMaskProgram.setMinimumAlpha(0.004f);
 		}
+		else
+		{
+			glAlphaFunc(GL_GEQUAL, 0.004f);
+		}
 	}
 
 	if( alpha_mask_specified || getInfo()->mWriteAllChannels )
@@ -1332,6 +1387,11 @@ BOOL LLTexLayer::blendAlphaTexture(S32 x, S32 y, S32 width, S32 height)
 			{
 				gAlphaMaskProgram.setMinimumAlpha(0.f);
 			}
+			else
+			{
+				glAlphaFunc(GL_GEQUAL, 0.0f);
+			}
+
 			gGL.getTexUnit(0)->bind(tex, TRUE);
 			gl_rect_2d_simple_tex( width, height );
 			gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
@@ -1339,6 +1399,10 @@ BOOL LLTexLayer::blendAlphaTexture(S32 x, S32 y, S32 width, S32 height)
 			{
 				gAlphaMaskProgram.setMinimumAlpha(0.004f);
 			}
+			else
+			{
+				glAlphaFunc(GL_GEQUAL, 0.004f);
+			}
 		}
 		else
 		{
@@ -1357,6 +1421,11 @@ BOOL LLTexLayer::blendAlphaTexture(S32 x, S32 y, S32 width, S32 height)
 				{
 					gAlphaMaskProgram.setMinimumAlpha(0.f);
 				}
+				else
+				{
+					glAlphaFunc(GL_GEQUAL, 0.0f);
+				}
+
 				gGL.getTexUnit(0)->bind(tex);
 				gl_rect_2d_simple_tex( width, height );
 				gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
@@ -1365,6 +1434,10 @@ BOOL LLTexLayer::blendAlphaTexture(S32 x, S32 y, S32 width, S32 height)
 				{
 					gAlphaMaskProgram.setMinimumAlpha(0.004f);
 				}
+				else
+				{
+					glAlphaFunc(GL_GEQUAL, 0.004f);
+				}
 			}
 		}
 	}
@@ -1391,6 +1464,11 @@ BOOL LLTexLayer::renderMorphMasks(S32 x, S32 y, S32 width, S32 height, const LLC
 	{
 		gAlphaMaskProgram.setMinimumAlpha(0.f);
 	}
+	else
+	{
+		glAlphaFunc(GL_GEQUAL, 0.0f);
+	}
+
 
 	gGL.setColorMask(false, true);
 
@@ -1471,6 +1549,10 @@ BOOL LLTexLayer::renderMorphMasks(S32 x, S32 y, S32 width, S32 height, const LLC
 	{
 		gAlphaMaskProgram.setMinimumAlpha(0.004f);
 	}
+	else
+	{
+		glAlphaFunc(GL_GEQUAL, 0.004f);
+	}
 
 	LLGLSUIDefault gls_ui;
 
-- 
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