3 files changed, 50 insertions, 56 deletions

diff --git a/indra/llimage/llimage.cpp b/indra/llimage/llimage.cpp
index d336eeaabc..eaac6806ab 100755
--- a/indra/llimage/llimage.cpp
+++ b/indra/llimage/llimage.cpp
@@ -524,7 +524,7 @@ inline U8 LLImageRaw::fastFractionalMult( U8 a, U8 b )
 }
 
 
-void LLImageRaw::composite( LLImageRaw* src )
+void LLImageRaw::composite( const LLImageRaw* src )
 {
 	LLImageRaw* dst = this;  // Just for clarity.
 
@@ -560,7 +560,7 @@ void LLImageRaw::composite( LLImageRaw* src )
 }
 
 // Src and dst can be any size.  Src has 4 components.  Dst has 3 components.
-void LLImageRaw::compositeScaled4onto3(LLImageRaw* src)
+void LLImageRaw::compositeScaled4onto3(const LLImageRaw* src)
 {
 	LL_INFOS() << "compositeScaled4onto3" << LL_ENDL;
 
@@ -568,26 +568,12 @@ void LLImageRaw::compositeScaled4onto3(LLImageRaw* src)
 
 	llassert( (4 == src->getComponents()) && (3 == dst->getComponents()) );
 
-	S32 temp_data_size = src->getWidth() * dst->getHeight() * src->getComponents();
-	llassert_always(temp_data_size > 0);
-	std::vector<U8> temp_buffer(temp_data_size);
-
-	// Vertical: scale but no composite
-	for( S32 col = 0; col < src->getWidth(); col++ )
-	{
-		copyLineScaled( src->getData() + (src->getComponents() * col), &temp_buffer[0] + (src->getComponents() * col), src->getHeight(), dst->getHeight(), src->getWidth(), src->getWidth() );
-	}
-
-	// Horizontal: scale and composite
-	for( S32 row = 0; row < dst->getHeight(); row++ )
-	{
-		compositeRowScaled4onto3( &temp_buffer[0] + (src->getComponents() * src->getWidth() * row), dst->getData() + (dst->getComponents() * dst->getWidth() * row), src->getWidth(), dst->getWidth() );
-	}
+	ll_nn2d_interpolation(src->getData(), src->getWidth(), src->getHeight(), src->getComponents(), dst->getData(), dst->getWidth(), dst->getHeight(), dst->getComponents());
 }
 
 
 // Src and dst are same size.  Src has 4 components.  Dst has 3 components.
-void LLImageRaw::compositeUnscaled4onto3( LLImageRaw* src )
+void LLImageRaw::compositeUnscaled4onto3( const LLImageRaw* src )
 {
 	/*
 	//test fastFractionalMult()
@@ -610,7 +596,7 @@ void LLImageRaw::compositeUnscaled4onto3( LLImageRaw* src )
 	llassert( (src->getWidth() == dst->getWidth()) && (src->getHeight() == dst->getHeight()) );
 
 
-	U8* src_data = src->getData();
+	const U8* src_data = src->getData();
 	U8* dst_data = dst->getData();
 	S32 pixels = getWidth() * getHeight();
 	while( pixels-- )
@@ -751,7 +737,7 @@ void LLImageRaw::copy(LLImageRaw* src)
 }
 
 // Src and dst are same size.  Src and dst have same number of components.
-void LLImageRaw::copyUnscaled(LLImageRaw* src)
+void LLImageRaw::copyUnscaled(const LLImageRaw* src)
 {
 	LLImageRaw* dst = this;  // Just for clarity.
 
@@ -833,7 +819,7 @@ void LLImageRaw::copyUnscaled3onto4( LLImageRaw* src )
 
 
 // Src and dst can be any size.  Src and dst have same number of components.
-void LLImageRaw::copyScaled( LLImageRaw* src )
+void LLImageRaw::copyScaled( const LLImageRaw* src )
 {
 	LLImageRaw* dst = this;  // Just for clarity.
 
@@ -846,21 +832,7 @@ void LLImageRaw::copyScaled( LLImageRaw* src )
 		return;
 	}
 
-	S32 temp_data_size = src->getWidth() * dst->getHeight() * getComponents();
-	llassert_always(temp_data_size > 0);
-	std::vector<U8> temp_buffer(temp_data_size);
-
-	// Vertical
-	for( S32 col = 0; col < src->getWidth(); col++ )
-	{
-		copyLineScaled( src->getData() + (getComponents() * col), &temp_buffer[0] + (getComponents() * col), src->getHeight(), dst->getHeight(), src->getWidth(), src->getWidth() );
-	}
-
-	// Horizontal
-	for( S32 row = 0; row < dst->getHeight(); row++ )
-	{
-		copyLineScaled( &temp_buffer[0] + (getComponents() * src->getWidth() * row), dst->getData() + (getComponents() * dst->getWidth() * row), src->getWidth(), dst->getWidth(), 1, 1 );
-	}
+	ll_nn2d_interpolation(src->getData(), src->getWidth(), src->getHeight(), src->getComponents(), dst->getData(), dst->getWidth(), dst->getHeight(), dst->getComponents());
 }
 
 
@@ -880,25 +852,17 @@ BOOL LLImageRaw::scale( S32 new_width, S32 new_height, BOOL scale_image_data )
 
 	if (scale_image_data)
 	{
-		S32 temp_data_size = old_width * new_height * getComponents();
-		llassert_always(temp_data_size > 0);
-		std::vector<U8> temp_buffer(temp_data_size);
+		S32 new_data_size = new_width * new_height * getComponents();
+		llassert_always(new_data_size > 0);
 
-		// Vertical
-		for( S32 col = 0; col < old_width; col++ )
+		U8 *new_data = (U8*)ALLOCATE_MEM(LLImageBase::getPrivatePool(), new_data_size); 
+		if(NULL == new_data) 
 		{
-			copyLineScaled( getData() + (getComponents() * col), &temp_buffer[0] + (getComponents() * col), old_height, new_height, old_width, old_width );
+			return FALSE; 
 		}
 
-		deleteData();
-
-		U8* new_buffer = allocateDataSize(new_width, new_height, getComponents());
-
-		// Horizontal
-		for( S32 row = 0; row < new_height; row++ )
-		{
-			copyLineScaled( &temp_buffer[0] + (getComponents() * old_width * row), new_buffer + (getComponents() * new_width * row), old_width, new_width, 1, 1 );
-		}
+		ll_nn2d_interpolation(getData(), old_width, old_height, getComponents(), new_data, new_width, new_height, getComponents());
+		setDataAndSize(new_data, new_width, new_height, getComponents());
 	}
 	else
 	{
diff --git a/indra/llimage/llimage.h b/indra/llimage/llimage.h
index cd3f76f1fd..eeb8e6de53 100755
--- a/indra/llimage/llimage.h
+++ b/indra/llimage/llimage.h
@@ -229,7 +229,7 @@ public:
 	void copy( LLImageRaw* src );
 
 	// Src and dst are same size.  Src and dst have same number of components.
-	void copyUnscaled( LLImageRaw* src );
+	void copyUnscaled( const LLImageRaw* src );
 	
 	// Src and dst are same size.  Src has 4 components.  Dst has 3 components.
 	void copyUnscaled4onto3( LLImageRaw* src );
@@ -243,7 +243,7 @@ public:
 	void copyUnscaledAlphaMask( LLImageRaw* src, const LLColor4U& fill);
 
 	// Src and dst can be any size.  Src and dst have same number of components.
-	void copyScaled( LLImageRaw* src );
+	void copyScaled( const LLImageRaw* src );
 
 	// Src and dst can be any size.  Src has 3 components.  Dst has 4 components.
 	void copyScaled3onto4( LLImageRaw* src );
@@ -255,13 +255,13 @@ public:
 	// Composite operations
 
 	// Src and dst can be any size.  Src and dst can each have 3 or 4 components.
-	void composite( LLImageRaw* src );
+	void composite( const LLImageRaw* src );
 
 	// Src and dst can be any size.  Src has 4 components.  Dst has 3 components.
-	void compositeScaled4onto3( LLImageRaw* src );
+	void compositeScaled4onto3( const LLImageRaw* src );
 
 	// Src and dst are same size.  Src has 4 components.  Dst has 3 components.
-	void compositeUnscaled4onto3( LLImageRaw* src );
+	void compositeUnscaled4onto3( const LLImageRaw* src );
 
 protected:
 	// Create an image from a local file (generally used in tools)
diff --git a/indra/llmath/llmath.h b/indra/llmath/llmath.h
index a8b27ad189..b4ac1dec73 100755
--- a/indra/llmath/llmath.h
+++ b/indra/llmath/llmath.h
@@ -32,6 +32,7 @@
 #include <vector>
 #include <limits>
 #include "lldefs.h"
+#include "llerror.h"
 //#include "llstl.h" // *TODO: Remove when LLString is gone
 //#include "llstring.h" // *TODO: Remove when LLString is gone
 // lltut.h uses is_approx_equal_fraction(). This was moved to its own header
@@ -556,6 +557,35 @@ inline void ll_remove_outliers(std::vector<VEC_TYPE>& data, F32 k)
 	}
 }
 
+inline void	ll_nn2d_interpolation(const U8 *const src, U32 srcW, U32 srcH, U8 srcCh, U8 *const dst, U32 dstW, U32 dstH, U8 dstCh)
+{
+	llassert(srcCh>=dstCh);
+
+	S32 tmp_x = 0, tmp_y = 0, tmp_x1 = 0, tmp_x2 = 0;
+
+	const S32 x_r = ((srcW<<16)/dstW)+1;
+	const S32 y_r = ((srcH<<16)/dstH)+1;
+	const S32 srcW_ch = srcW*srcCh;
+	const S32 dstW_ch = dstW*dstCh;
+
+	for(U32 y = 0; y < dstH; ++y)
+	{
+		tmp_y = ((y*y_r)>>16)*srcW_ch;
+		tmp_x1 = y*dstW_ch;
+
+		for(U32 x = 0; x < dstW; x++)
+		{
+			tmp_x = (((x*x_r)>>16)*srcCh)+tmp_y;
+			tmp_x2 = tmp_x1+x*dstCh;
+
+			for(U8 c = 0; c < dstCh; ++c)
+			{
+				dst[tmp_x2+c] = src[tmp_x+c];
+			}
+		}
+	}
+}
+
 // Include simd math header
 #include "llsimdmath.h"