1 files changed, 98 insertions, 4 deletions

diff --git a/indra/newview/lldrawpoolwater.cpp b/indra/newview/lldrawpoolwater.cpp
index 0ee70bcdd1..dc94924da4 100644
--- a/indra/newview/lldrawpoolwater.cpp
+++ b/indra/newview/lldrawpoolwater.cpp
@@ -48,7 +48,8 @@
 #include "llviewershadermgr.h"
 #include "llwaterparammanager.h"
 
-const LLUUID WATER_TEST("2bfd3884-7e27-69b9-ba3a-3e673f680004");
+const LLUUID TRANSPARENT_WATER_TEXTURE("2bfd3884-7e27-69b9-ba3a-3e673f680004");
+const LLUUID OPAQUE_WATER_TEXTURE("43c32285-d658-1793-c123-bf86315de055");
 
 static float sTime;
 
@@ -71,10 +72,14 @@ LLDrawPoolWater::LLDrawPoolWater() :
 	gGL.getTexUnit(0)->bind(mHBTex[1]);
 	mHBTex[1]->setAddressMode(LLTexUnit::TAM_CLAMP);
 
-	mWaterImagep = LLViewerTextureManager::getFetchedTexture(WATER_TEST);
-	mWaterImagep->setNoDelete() ;
+
+	mWaterImagep = LLViewerTextureManager::getFetchedTexture(TRANSPARENT_WATER_TEXTURE);
+	llassert(mWaterImagep);
+	mWaterImagep->setNoDelete();
+	mOpaqueWaterImagep = LLViewerTextureManager::getFetchedTexture(OPAQUE_WATER_TEXTURE);
+	llassert(mOpaqueWaterImagep);
 	mWaterNormp = LLViewerTextureManager::getFetchedTexture(DEFAULT_WATER_NORMAL);
-	mWaterNormp->setNoDelete() ;
+	mWaterNormp->setNoDelete();
 
 	restoreGL();
 }
@@ -161,6 +166,14 @@ void LLDrawPoolWater::render(S32 pass)
 
 	std::sort(mDrawFace.begin(), mDrawFace.end(), LLFace::CompareDistanceGreater());
 
+	// See if we are rendering water as opaque or not
+	if (!gSavedSettings.getBOOL("RenderTransparentWater"))
+	{
+		// render water for low end hardware
+		renderOpaqueLegacyWater();
+		return;
+	}
+
 	LLGLEnable blend(GL_BLEND);
 
 	if ((mVertexShaderLevel > 0) && !sSkipScreenCopy)
@@ -314,6 +327,87 @@ void LLDrawPoolWater::render(S32 pass)
 	gGL.getTexUnit(0)->setTextureBlendType(LLTexUnit::TB_MULT);
 }
 
+// for low end hardware
+void LLDrawPoolWater::renderOpaqueLegacyWater()
+{
+	LLVOSky *voskyp = gSky.mVOSkyp;
+
+	stop_glerror();
+
+	// Depth sorting and write to depth buffer
+	// since this is opaque, we should see nothing
+	// behind the water.  No blending because
+	// of no transparency.  And no face culling so
+	// that the underside of the water is also opaque.
+	LLGLDepthTest gls_depth(GL_TRUE, GL_TRUE);
+	LLGLDisable no_cull(GL_CULL_FACE);
+	LLGLDisable no_blend(GL_BLEND);
+
+	gPipeline.disableLights();
+
+	mOpaqueWaterImagep->addTextureStats(1024.f*1024.f);
+
+	// Activate the texture binding and bind one
+	// texture since all images will have the same texture
+	gGL.getTexUnit(0)->activate();
+	gGL.getTexUnit(0)->enable(LLTexUnit::TT_TEXTURE);
+	gGL.getTexUnit(0)->bind(mOpaqueWaterImagep);
+
+	// Automatically generate texture coords for water texture
+	glEnable(GL_TEXTURE_GEN_S); //texture unit 0
+	glEnable(GL_TEXTURE_GEN_T); //texture unit 0
+	glTexGenf(GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
+	glTexGenf(GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
+
+	// Use the fact that we know all water faces are the same size
+	// to save some computation
+
+	// Slowly move texture coordinates over time so the watter appears
+	// to be moving.
+	F32 movement_period_secs = 50.f;
+
+	F32 offset = fmod(gFrameTimeSeconds, movement_period_secs);
+
+	if (movement_period_secs != 0)
+	{
+	 	offset /= movement_period_secs;
+	}
+	else
+	{
+		offset = 0;
+	}
+
+	F32 tp0[4] = { 16.f / 256.f, 0.0f, 0.0f, offset };
+	F32 tp1[4] = { 0.0f, 16.f / 256.f, 0.0f, offset };
+
+	glTexGenfv(GL_S, GL_OBJECT_PLANE, tp0);
+	glTexGenfv(GL_T, GL_OBJECT_PLANE, tp1);
+
+	glColor3f(1.f, 1.f, 1.f);
+
+	for (std::vector<LLFace*>::iterator iter = mDrawFace.begin();
+		 iter != mDrawFace.end(); iter++)
+	{
+		LLFace *face = *iter;
+		if (voskyp->isReflFace(face))
+		{
+			continue;
+		}
+
+		face->renderIndexed();
+	}
+
+	stop_glerror();
+
+	// Reset the settings back to expected values
+	glDisable(GL_TEXTURE_GEN_S); //texture unit 0
+	glDisable(GL_TEXTURE_GEN_T); //texture unit 0
+
+	gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
+	gGL.getTexUnit(0)->setTextureBlendType(LLTexUnit::TB_MULT);
+}
+
+
 void LLDrawPoolWater::renderReflection(LLFace* face)
 {
 	LLVOSky *voskyp = gSky.mVOSkyp;