5 files changed, 33 insertions, 7 deletions
diff --git a/indra/llrender/llglslshader.cpp b/indra/llrender/llglslshader.cpp
index 8f3a56e1cf..f8b5dd0559 100644
--- a/indra/llrender/llglslshader.cpp
+++ b/indra/llrender/llglslshader.cpp
@@ -974,7 +974,7 @@ S32 LLGLSLShader::unbindTexture(S32 uniform, LLTexUnit::eTextureType mode)
     return uniform;
 }
 
-S32 LLGLSLShader::enableTexture(S32 uniform, LLTexUnit::eTextureType mode)
+S32 LLGLSLShader::enableTexture(S32 uniform, LLTexUnit::eTextureType mode, LLTexUnit::eTextureColorSpace space)
 {
     if (uniform < 0 || uniform >= (S32)mTexture.size())
     {
@@ -986,11 +986,12 @@ S32 LLGLSLShader::enableTexture(S32 uniform, LLTexUnit::eTextureType mode)
     {
         gGL.getTexUnit(index)->activate();
         gGL.getTexUnit(index)->enable(mode);
+        gGL.getTexUnit(index)->setTextureColorSpace(space);
     }
     return index;
 }
 
-S32 LLGLSLShader::disableTexture(S32 uniform, LLTexUnit::eTextureType mode)
+S32 LLGLSLShader::disableTexture(S32 uniform, LLTexUnit::eTextureType mode, LLTexUnit::eTextureColorSpace space)
 {
     if (uniform < 0 || uniform >= (S32)mTexture.size())
     {
@@ -1000,7 +1001,7 @@ S32 LLGLSLShader::disableTexture(S32 uniform, LLTexUnit::eTextureType mode)
     S32 index = mTexture[uniform];
     if (index != -1 && gGL.getTexUnit(index)->getCurrType() != LLTexUnit::TT_NONE)
     {
-        if (gDebugGL && gGL.getTexUnit(index)->getCurrType() != mode)
+        if (gDebugGL && gGL.getTexUnit(index)->getCurrType() != mode && gGL.getTexUnit(index)->getCurrColorSpace() != space)
         {
             if (gDebugSession)
             {
diff --git a/indra/llrender/llglslshader.h b/indra/llrender/llglslshader.h
index c1ce3d3aad..974d0ea005 100644
--- a/indra/llrender/llglslshader.h
+++ b/indra/llrender/llglslshader.h
@@ -153,8 +153,8 @@ public:
 	//if given texture uniform is active in the shader, 
 	//the corresponding channel will be active upon return
 	//returns channel texture is enabled in from [0-MAX)
-	S32 enableTexture(S32 uniform, LLTexUnit::eTextureType mode = LLTexUnit::TT_TEXTURE);
-	S32 disableTexture(S32 uniform, LLTexUnit::eTextureType mode = LLTexUnit::TT_TEXTURE);
+	S32 enableTexture(S32 uniform, LLTexUnit::eTextureType mode = LLTexUnit::TT_TEXTURE, LLTexUnit::eTextureColorSpace space = LLTexUnit::TCS_LINEAR);
+    S32 disableTexture(S32 uniform, LLTexUnit::eTextureType mode = LLTexUnit::TT_TEXTURE, LLTexUnit::eTextureColorSpace space = LLTexUnit::TCS_LINEAR);
 	
 	// bindTexture returns the texture unit we've bound the texture to.
 	// You can reuse the return value to unbind a texture when required.
diff --git a/indra/llrender/llimagegl.cpp b/indra/llrender/llimagegl.cpp
index 2d526a2113..8b51bf4b9f 100644
--- a/indra/llrender/llimagegl.cpp
+++ b/indra/llrender/llimagegl.cpp
@@ -1385,12 +1385,12 @@ BOOL LLImageGL::createGLTexture(S32 discard_level, const LLImageRaw* imageraw, S
 			mFormatType = GL_UNSIGNED_BYTE;
 			break;
 			case 3:
-			mFormatInternal = GL_RGB8;
+			mFormatInternal = GL_SRGB8;
 			mFormatPrimary = GL_RGB;
 			mFormatType = GL_UNSIGNED_BYTE;
 			break;
 			case 4:
-			mFormatInternal = GL_RGBA8;
+			mFormatInternal = GL_SRGB8_ALPHA8;
 			mFormatPrimary = GL_RGBA;
 			mFormatType = GL_UNSIGNED_BYTE;
 			break;
diff --git a/indra/llrender/llrender.cpp b/indra/llrender/llrender.cpp
index 2bf7ad9902..53a30a63c4 100644
--- a/indra/llrender/llrender.cpp
+++ b/indra/llrender/llrender.cpp
@@ -838,6 +838,20 @@ void LLTexUnit::debugTextureUnit(void)
 	}
 }
 
+void LLTexUnit::setTextureColorSpace(eTextureColorSpace space) {
+    mTexColorSpace = space;
+    if (space == TCS_SRGB) {
+        glTexParameteri(sGLTextureType[mCurrTexType], GL_TEXTURE_SRGB_DECODE_EXT, GL_DECODE_EXT);
+    }
+    else {
+        glTexParameteri(sGLTextureType[mCurrTexType], GL_TEXTURE_SRGB_DECODE_EXT, GL_SKIP_DECODE_EXT);
+    }
+
+    if (gDebugGL) {
+        assert_glerror();
+    }
+}
+
 LLLightState::LLLightState(S32 index)
 : mIndex(index),
   mEnabled(false),
diff --git a/indra/llrender/llrender.h b/indra/llrender/llrender.h
index ad9cd11283..2f15edc20e 100644
--- a/indra/llrender/llrender.h
+++ b/indra/llrender/llrender.h
@@ -131,6 +131,12 @@ public:
 		TBS_ONE_MINUS_CONST_ALPHA
 	} eTextureBlendSrc;
 
+    typedef enum
+    {
+        TCS_LINEAR = 0,
+        TCS_SRGB
+    } eTextureColorSpace;
+
 	LLTexUnit(S32 index);
 
 	// Refreshes renderer state of the texture unit to the cached values
@@ -198,6 +204,10 @@ public:
 
 	void setHasMipMaps(bool hasMips) { mHasMipMaps = hasMips; }
 
+    void setTextureColorSpace(eTextureColorSpace space);
+
+    eTextureColorSpace getCurrColorSpace() { return mTexColorSpace; }
+
 protected:
 	const S32			mIndex;
 	U32					mCurrTexture;
@@ -209,6 +219,7 @@ protected:
 	eTextureBlendOp		mCurrAlphaOp;
 	eTextureBlendSrc	mCurrAlphaSrc1;
 	eTextureBlendSrc	mCurrAlphaSrc2;
+    eTextureColorSpace  mTexColorSpace;
 	S32					mCurrColorScale;
 	S32					mCurrAlphaScale;
 	bool				mHasMipMaps;