MAINT-6584: Convert LLImage class hierarchy to standard 'bool'

instead of legacy BOOL.

14 files changed, 282 insertions, 282 deletions

diff --git a/indra/llimage/llimage.cpp b/indra/llimage/llimage.cpp
index 08462c7834..109ef7e904 100644
--- a/indra/llimage/llimage.cpp
+++ b/indra/llimage/llimage.cpp
@@ -895,30 +895,30 @@ void LLImageRaw::setDataAndSize(U8 *data, S32 width, S32 height, S8 components)
 	sGlobalRawMemory += getDataSize();
 }
 
-BOOL LLImageRaw::resize(U16 width, U16 height, S8 components)
+bool LLImageRaw::resize(U16 width, U16 height, S8 components)
 {
 	if ((getWidth() == width) && (getHeight() == height) && (getComponents() == components))
 	{
-		return TRUE;
+		return true;
 	}
 	// Reallocate the data buffer.
 	deleteData();
 
 	allocateDataSize(width,height,components);
 
-	return TRUE;
+	return true;
 }
 
-BOOL LLImageRaw::setSubImage(U32 x_pos, U32 y_pos, U32 width, U32 height,
-							 const U8 *data, U32 stride, BOOL reverse_y)
+bool LLImageRaw::setSubImage(U32 x_pos, U32 y_pos, U32 width, U32 height,
+							 const U8 *data, U32 stride, bool reverse_y)
 {
 	if (!getData())
 	{
-		return FALSE;
+		return false;
 	}
 	if (!data)
 	{
-		return FALSE;
+		return false;
 	}
 
 	// Should do some simple bounds checking
@@ -933,7 +933,7 @@ BOOL LLImageRaw::setSubImage(U32 x_pos, U32 y_pos, U32 width, U32 height,
 				data + from_offset, getComponents()*width);
 	}
 
-	return TRUE;
+	return true;
 }
 
 void LLImageRaw::clear(U8 r, U8 g, U8 b, U8 a)
@@ -988,7 +988,7 @@ void LLImageRaw::verticalFlip()
 }
 
 
-void LLImageRaw::expandToPowerOfTwo(S32 max_dim, BOOL scale_image)
+void LLImageRaw::expandToPowerOfTwo(S32 max_dim, bool scale_image)
 {
 	// Find new sizes
 	S32 new_width  = expandDimToPowerOfTwo(getWidth(), max_dim);
@@ -997,7 +997,7 @@ void LLImageRaw::expandToPowerOfTwo(S32 max_dim, BOOL scale_image)
 	scale( new_width, new_height, scale_image );
 }
 
-void LLImageRaw::contractToPowerOfTwo(S32 max_dim, BOOL scale_image)
+void LLImageRaw::contractToPowerOfTwo(S32 max_dim, bool scale_image)
 {
 	// Find new sizes
 	S32 new_width  = contractDimToPowerOfTwo(getWidth(), MIN_IMAGE_SIZE);
@@ -1397,7 +1397,7 @@ void LLImageRaw::copyScaled( LLImageRaw* src )
 }
 
 
-BOOL LLImageRaw::scale( S32 new_width, S32 new_height, BOOL scale_image_data )
+bool LLImageRaw::scale( S32 new_width, S32 new_height, bool scale_image_data )
 {
 	llassert((1 == getComponents()) || (3 == getComponents()) || (4 == getComponents()) );
 
@@ -1406,7 +1406,7 @@ BOOL LLImageRaw::scale( S32 new_width, S32 new_height, BOOL scale_image_data )
 	
 	if( (old_width == new_width) && (old_height == new_height) )
 	{
-		return TRUE;  // Nothing to do.
+		return true;  // Nothing to do.
 	}
 
 	// Reallocate the data buffer.
@@ -1441,7 +1441,7 @@ BOOL LLImageRaw::scale( S32 new_width, S32 new_height, BOOL scale_image_data )
 		U8 *new_data = (U8*)ALLOCATE_MEM(LLImageBase::getPrivatePool(), new_data_size); 
 		if(NULL == new_data) 
 		{
-			return FALSE; 
+			return false; 
 		}
 
 		bilinear_scale(getData(), old_width, old_height, getComponents(), old_width*getComponents(), new_data, new_width, new_height, getComponents(), new_width*getComponents());
@@ -1476,7 +1476,7 @@ BOOL LLImageRaw::scale( S32 new_width, S32 new_height, BOOL scale_image_data )
 		}
 	}
 
-	return TRUE ;
+	return true ;
 }
 
 void LLImageRaw::copyLineScaled( U8* in, U8* out, S32 in_pixel_len, S32 out_pixel_len, S32 in_pixel_step, S32 out_pixel_step )
@@ -1795,7 +1795,7 @@ bool LLImageRaw::createFromFile(const std::string &filename, bool j2c_lowest_mip
 	ifs.read ((char*)buffer, length);
 	ifs.close();
 	
-	BOOL success;
+	bool success;
 
 	success = image->updateData();
 	if (success)
@@ -1971,7 +1971,7 @@ S32 LLImageFormatted::calcDiscardLevelBytes(S32 bytes)
 //----------------------------------------------------------------------------
 
 // Subclasses that can handle more than 4 channels should override this function.
-BOOL LLImageFormatted::decodeChannels(LLImageRaw* raw_image,F32  decode_time, S32 first_channel, S32 max_channel)
+bool LLImageFormatted::decodeChannels(LLImageRaw* raw_image,F32  decode_time, S32 first_channel, S32 max_channel)
 {
 	llassert( (first_channel == 0) && (max_channel == 4) );
 	return decode( raw_image, decode_time );  // Loads first 4 channels by default.
@@ -2022,7 +2022,7 @@ void LLImageFormatted::sanityCheck()
 
 //----------------------------------------------------------------------------
 
-BOOL LLImageFormatted::copyData(U8 *data, S32 size)
+bool LLImageFormatted::copyData(U8 *data, S32 size)
 {
 	if ( data && ((data != getData()) || (size != getDataSize())) )
 	{
@@ -2030,7 +2030,7 @@ BOOL LLImageFormatted::copyData(U8 *data, S32 size)
 		allocateData(size);
 		memcpy(getData(), data, size);	/* Flawfinder: ignore */
 	}
-	return TRUE;
+	return true;
 }
 
 // LLImageFormatted becomes the owner of data
@@ -2066,7 +2066,7 @@ void LLImageFormatted::appendData(U8 *data, S32 size)
 
 //----------------------------------------------------------------------------
 
-BOOL LLImageFormatted::load(const std::string &filename, int load_size)
+bool LLImageFormatted::load(const std::string &filename, int load_size)
 {
 	resetLastError();
 
@@ -2077,12 +2077,12 @@ BOOL LLImageFormatted::load(const std::string &filename, int load_size)
 	if (!apr_file)
 	{
 		setLastError("Unable to open file for reading", filename);
-		return FALSE;
+		return false;
 	}
 	if (file_size == 0)
 	{
 		setLastError("File is empty",filename);
-		return FALSE;
+		return false;
 	}
 
 	// Constrain the load size to acceptable values
@@ -2090,7 +2090,7 @@ BOOL LLImageFormatted::load(const std::string &filename, int load_size)
 	{
 		load_size = file_size;
 	}
-	BOOL res;
+	bool res;
 	U8 *data = allocateData(load_size);
 	apr_size_t bytes_read = load_size;
 	apr_status_t s = apr_file_read(apr_file, data, &bytes_read); // modifies bytes_read
@@ -2098,7 +2098,7 @@ BOOL LLImageFormatted::load(const std::string &filename, int load_size)
 	{
 		deleteData();
 		setLastError("Unable to read file",filename);
-		res = FALSE;
+		res = false;
 	}
 	else
 	{
@@ -2108,7 +2108,7 @@ BOOL LLImageFormatted::load(const std::string &filename, int load_size)
 	return res;
 }
 
-BOOL LLImageFormatted::save(const std::string &filename)
+bool LLImageFormatted::save(const std::string &filename)
 {
 	resetLastError();
 
@@ -2117,15 +2117,15 @@ BOOL LLImageFormatted::save(const std::string &filename)
 	if (!outfile.getFileHandle())
 	{
 		setLastError("Unable to open file for writing", filename);
-		return FALSE;
+		return false;
 	}
 	
 	outfile.write(getData(), 	getDataSize());
 	outfile.close() ;
-	return TRUE;
+	return true;
 }
 
-// BOOL LLImageFormatted::save(LLVFS *vfs, const LLUUID &uuid, LLAssetType::EType type)
+// bool LLImageFormatted::save(LLVFS *vfs, const LLUUID &uuid, LLAssetType::EType type)
 // Depricated to remove VFS dependency.
 // Use:
 // LLVFile::writeFile(image->getData(), image->getDataSize(), vfs, uuid, type);
diff --git a/indra/llimage/llimage.h b/indra/llimage/llimage.h
index cd3f76f1fd..adc650d360 100644
--- a/indra/llimage/llimage.h
+++ b/indra/llimage/llimage.h
@@ -199,11 +199,11 @@ public:
 	/*virtual*/ U8* allocateData(S32 size = -1);
 	/*virtual*/ U8* reallocateData(S32 size);
 	
-	BOOL resize(U16 width, U16 height, S8 components);
+	bool resize(U16 width, U16 height, S8 components);
 
 	//U8 * getSubImage(U32 x_pos, U32 y_pos, U32 width, U32 height) const;
-	BOOL setSubImage(U32 x_pos, U32 y_pos, U32 width, U32 height,
-					 const U8 *data, U32 stride = 0, BOOL reverse_y = FALSE);
+	bool setSubImage(U32 x_pos, U32 y_pos, U32 width, U32 height,
+					 const U8 *data, U32 stride = 0, bool reverse_y = false);
 
 	void clear(U8 r=0, U8 g=0, U8 b=0, U8 a=255);
 
@@ -212,10 +212,10 @@ public:
     static S32 biasedDimToPowerOfTwo(S32 curr_dim, S32 max_dim = MAX_IMAGE_SIZE);
     static S32 expandDimToPowerOfTwo(S32 curr_dim, S32 max_dim = MAX_IMAGE_SIZE);
     static S32 contractDimToPowerOfTwo(S32 curr_dim, S32 min_dim = MIN_IMAGE_SIZE);
-	void expandToPowerOfTwo(S32 max_dim = MAX_IMAGE_SIZE, BOOL scale_image = TRUE);
-	void contractToPowerOfTwo(S32 max_dim = MAX_IMAGE_SIZE, BOOL scale_image = TRUE);
+	void expandToPowerOfTwo(S32 max_dim = MAX_IMAGE_SIZE, bool scale_image = true);
+	void contractToPowerOfTwo(S32 max_dim = MAX_IMAGE_SIZE, bool scale_image = true);
 	void biasedScaleToPowerOfTwo(S32 max_dim = MAX_IMAGE_SIZE);
-	BOOL scale( S32 new_width, S32 new_height, BOOL scale_image = TRUE );
+	bool scale( S32 new_width, S32 new_height, bool scale_image = true );
 	
 	// Fill the buffer with a constant color
 	void fill( const LLColor4U& color );
@@ -314,23 +314,23 @@ public:
 	// getRawDiscardLevel() by default returns mDiscardLevel, but may be overridden (LLImageJ2C)
 	virtual S8  getRawDiscardLevel() { return mDiscardLevel; }
 	
-	BOOL load(const std::string& filename, int load_size = 0);
-	BOOL save(const std::string& filename);
+	bool load(const std::string& filename, int load_size = 0);
+	bool save(const std::string& filename);
 
-	virtual BOOL updateData() = 0; // pure virtual
+	virtual bool updateData() = 0; // pure virtual
  	void setData(U8 *data, S32 size);
  	void appendData(U8 *data, S32 size);
 
 	// Loads first 4 channels.
-	virtual BOOL decode(LLImageRaw* raw_image, F32 decode_time) = 0;  
+	virtual bool decode(LLImageRaw* raw_image, F32 decode_time) = 0;  
 	// Subclasses that can handle more than 4 channels should override this function.
-	virtual BOOL decodeChannels(LLImageRaw* raw_image, F32 decode_time, S32 first_channel, S32 max_channel);
+	virtual bool decodeChannels(LLImageRaw* raw_image, F32 decode_time, S32 first_channel, S32 max_channel);
 
-	virtual BOOL encode(const LLImageRaw* raw_image, F32 encode_time) = 0;
+	virtual bool encode(const LLImageRaw* raw_image, F32 encode_time) = 0;
 
 	S8 getCodec() const;
-	BOOL isDecoding() const { return mDecoding ? TRUE : FALSE; }
-	BOOL isDecoded()  const { return mDecoded ? TRUE : FALSE; }
+	bool isDecoding() const { return mDecoding; }
+	bool isDecoded()  const { return mDecoded; }
 	void setDiscardLevel(S8 discard_level) { mDiscardLevel = discard_level; }
 	S8 getDiscardLevel() const { return mDiscardLevel; }
 	S8 getLevels() const { return mLevels; }
@@ -341,7 +341,7 @@ public:
 	virtual void setLastError(const std::string& message, const std::string& filename = std::string());
 	
 protected:
-	BOOL copyData(U8 *data, S32 size); // calls updateData()
+	bool copyData(U8 *data, S32 size); // calls updateData()
 	
 protected:
 	S8 mCodec;
diff --git a/indra/llimage/llimagebmp.cpp b/indra/llimage/llimagebmp.cpp
index a2ce2fee86..2cdd26c22b 100644
--- a/indra/llimage/llimagebmp.cpp
+++ b/indra/llimage/llimagebmp.cpp
@@ -78,7 +78,7 @@ LLImageBMP::LLImageBMP()
 	mColorPalette( NULL ),
 	mBitmapOffset( 0 ),
 	mBitsPerPixel( 0 ),
-	mOriginAtTop( FALSE )
+	mOriginAtTop( false )
 {
 	mBitfieldMask[0] = 0;
 	mBitfieldMask[1] = 0;
@@ -92,7 +92,7 @@ LLImageBMP::~LLImageBMP()
 }
 
 
-BOOL LLImageBMP::updateData()
+bool LLImageBMP::updateData()
 {
 	resetLastError();
 
@@ -101,7 +101,7 @@ BOOL LLImageBMP::updateData()
 	if (!mdata || (0 == getDataSize()))
 	{
 		setLastError("Uninitialized instance of LLImageBMP");
-		return FALSE;
+		return false;
 	}
 
 	// Read the bitmap headers in order to get all the useful info
@@ -120,12 +120,12 @@ BOOL LLImageBMP::updateData()
 		if ((mdata[0] != 'B') || (mdata[1] != 'A'))
 		{
 			setLastError("OS/2 bitmap array BMP files are not supported");
-			return FALSE;
+			return false;
 		}
 		else
 		{
 			setLastError("Does not appear to be a bitmap file");
-			return FALSE;
+			return false;
 		}
 	}
 
@@ -160,12 +160,12 @@ BOOL LLImageBMP::updateData()
 	llendianswizzleone(header.mNumColors);
 	llendianswizzleone(header.mNumColorsImportant);
 
-	BOOL windows_nt_version = FALSE;
-	BOOL windows_95_version = FALSE;
+	bool windows_nt_version = false;
+	bool windows_95_version = false;
 	if( 12 == header.mSize )
 	{
 		setLastError("Windows 2.x and OS/2 1.x BMP files are not supported");
-		return FALSE;
+		return false;
 	}
 	else
 	if( 40 == header.mSize )
@@ -173,7 +173,7 @@ BOOL LLImageBMP::updateData()
 		if( 3 == header.mCompression )
 		{
 			// Windows NT
-			windows_nt_version = TRUE;
+			windows_nt_version = true;
 		}
 		else
 		{
@@ -184,32 +184,32 @@ BOOL LLImageBMP::updateData()
 	if( 12 <= header.mSize && 64 <= header.mSize )
 	{
 		setLastError("OS/2 2.x BMP files are not supported");
-		return FALSE;
+		return false;
 	}
 	else
 	if( 108 == header.mSize )
 	{
 		// BITMAPV4HEADER
-		windows_95_version = TRUE;
+		windows_95_version = true;
 	}
 	else
 	if( 108 < header.mSize )
 	{
 		// BITMAPV5HEADER or greater
 		// Should work as long at Microsoft maintained backwards compatibility (which they did in V4 and V5)
-		windows_95_version = TRUE;
+		windows_95_version = true;
 	}
 
 	S32 width = header.mWidth;
 	S32 height = header.mHeight;
 	if (height < 0)
 	{
-		mOriginAtTop = TRUE;
+		mOriginAtTop = true;
 		height = -height;
 	}
 	else
 	{
-		mOriginAtTop = FALSE;
+		mOriginAtTop = false;
 	}
 
 	mBitsPerPixel = header.mBitsPerPixel;
@@ -228,10 +228,10 @@ BOOL LLImageBMP::updateData()
 	case 16: // Started work on 16, but doesn't work yet
 		// These are legal, but we don't support them yet.
 		setLastError("Unsupported bit depth");
-		return FALSE;
+		return false;
 	default:
 		setLastError("Unrecognized bit depth");
-		return FALSE;
+		return false;
 	}
 
 	setSize(width, height, components);
@@ -244,11 +244,11 @@ BOOL LLImageBMP::updateData()
 
 	case 1:
 		setLastError("8 bit RLE compression not supported.");
-		return FALSE;
+		return false;
 
 	case 2: 
 		setLastError("4 bit RLE compression not supported.");
-		return FALSE;
+		return false;
 
 	case 3:
 		// Windows NT or Windows 95
@@ -256,7 +256,7 @@ BOOL LLImageBMP::updateData()
 
 	default:
 		setLastError("Unsupported compression format.");
-		return FALSE;
+		return false;
 	}
 
 	////////////////////////////////////////////////////////////////////
@@ -267,13 +267,13 @@ BOOL LLImageBMP::updateData()
 		if( (16 != header.mBitsPerPixel) && (32 != header.mBitsPerPixel) )
 		{
 			setLastError("Bitfield encoding requires 16 or 32 bits per pixel.");
-			return FALSE;
+			return false;
 		}
 
 		if( 0 != header.mNumColors )
 		{
 			setLastError("Bitfield encoding is not compatible with a color table.");
-			return FALSE;
+			return false;
 		}
 
 		
@@ -322,15 +322,15 @@ BOOL LLImageBMP::updateData()
 		if (!mColorPalette)
 		{
 			LL_ERRS() << "Out of memory in LLImageBMP::updateData()" << LL_ENDL;
-			return FALSE;
+			return false;
 		}
 		memcpy( mColorPalette, mdata + FILE_HEADER_SIZE + BITMAP_HEADER_SIZE + extension_size, color_palette_size );	/* Flawfinder: ignore */
 	}
 
-	return TRUE;
+	return true;
 }
 
-BOOL LLImageBMP::decode(LLImageRaw* raw_image, F32 decode_time)
+bool LLImageBMP::decode(LLImageRaw* raw_image, F32 decode_time)
 {
 	llassert_always(raw_image);
 	
@@ -341,7 +341,7 @@ BOOL LLImageBMP::decode(LLImageRaw* raw_image, F32 decode_time)
 	if (!mdata || (0 == getDataSize()))
 	{
 		setLastError("llimagebmp trying to decode an image with no data!");
-		return FALSE;
+		return false;
 	}
 	
 	raw_image->resize(getWidth(), getHeight(), 3);
@@ -349,7 +349,7 @@ BOOL LLImageBMP::decode(LLImageRaw* raw_image, F32 decode_time)
 	U8* src = mdata + mBitmapOffset;
 	U8* dst = raw_image->getData();
 
-	BOOL success = FALSE;
+	bool success = false;
 
 	switch( mBitsPerPixel )
 	{
@@ -393,7 +393,7 @@ U32 LLImageBMP::countTrailingZeros( U32 m )
 }
 
 
-BOOL LLImageBMP::decodeColorMask16( U8* dst, U8* src )
+bool LLImageBMP::decodeColorMask16( U8* dst, U8* src )
 {
 	llassert( 16 == mBitsPerPixel );
 
@@ -426,10 +426,10 @@ BOOL LLImageBMP::decodeColorMask16( U8* dst, U8* src )
 		src += alignment_bytes;
 	}
 
-	return TRUE;
+	return true;
 }
 
-BOOL LLImageBMP::decodeColorMask32( U8* dst, U8* src )
+bool LLImageBMP::decodeColorMask32( U8* dst, U8* src )
 {
 	// Note: alpha is not supported
 
@@ -445,7 +445,7 @@ BOOL LLImageBMP::decodeColorMask32( U8* dst, U8* src )
 
 	if (getWidth() * getHeight() * 4 > getDataSize() - mBitmapOffset)
 	{ //here we have situation when data size in src less than actually needed
-		return FALSE;
+		return false;
 	}
 
 	S32 src_row_span = getWidth() * 4;
@@ -469,11 +469,11 @@ BOOL LLImageBMP::decodeColorMask32( U8* dst, U8* src )
 		src += alignment_bytes;
 	}
 
-	return TRUE;
+	return true;
 }
 
 
-BOOL LLImageBMP::decodeColorTable8( U8* dst, U8* src )
+bool LLImageBMP::decodeColorTable8( U8* dst, U8* src )
 {
 	llassert( (8 == mBitsPerPixel) && (mColorPaletteColors >= 256) );
 
@@ -482,7 +482,7 @@ BOOL LLImageBMP::decodeColorTable8( U8* dst, U8* src )
 
 	if ((getWidth() * getHeight()) + getHeight() * alignment_bytes > getDataSize() - mBitmapOffset)
 	{ //here we have situation when data size in src less than actually needed
-		return FALSE;
+		return false;
 	}
 
 	for( S32 row = 0; row < getHeight(); row++ )
@@ -499,11 +499,11 @@ BOOL LLImageBMP::decodeColorTable8( U8* dst, U8* src )
 		src += alignment_bytes;
 	}
 
-	return TRUE;
+	return true;
 }
 
 
-BOOL LLImageBMP::decodeTruecolor24( U8* dst, U8* src )
+bool LLImageBMP::decodeTruecolor24( U8* dst, U8* src )
 {
 	llassert( 24 == mBitsPerPixel );
 	llassert( 3 == getComponents() );
@@ -512,7 +512,7 @@ BOOL LLImageBMP::decodeTruecolor24( U8* dst, U8* src )
 
 	if ((getWidth() * getHeight() * 3) + getHeight() * alignment_bytes > getDataSize() - mBitmapOffset)
 	{ //here we have situation when data size in src less than actually needed
-		return FALSE;
+		return false;
 	}
 
 	for( S32 row = 0; row < getHeight(); row++ )
@@ -528,10 +528,10 @@ BOOL LLImageBMP::decodeTruecolor24( U8* dst, U8* src )
 		src += alignment_bytes;
 	}
 
-	return TRUE;
+	return true;
 }
 
-BOOL LLImageBMP::encode(const LLImageRaw* raw_image, F32 encode_time)
+bool LLImageBMP::encode(const LLImageRaw* raw_image, F32 encode_time)
 {
 	llassert_always(raw_image);
 	
@@ -563,7 +563,7 @@ BOOL LLImageBMP::encode(const LLImageRaw* raw_image, F32 encode_time)
 	// Allocate the new buffer for the data.
 	if(!allocateData(file_bytes)) //memory allocation failed
 	{
-		return FALSE ;
+		return false ;
 	}
 
 	magic[0] = 'B'; magic[1] = 'M';
@@ -663,5 +663,5 @@ BOOL LLImageBMP::encode(const LLImageRaw* raw_image, F32 encode_time)
 		}
 	}
 
-	return TRUE;
+	return true;
 }
diff --git a/indra/llimage/llimagebmp.h b/indra/llimage/llimagebmp.h
index db0b45def0..6a5fa4697d 100644
--- a/indra/llimage/llimagebmp.h
+++ b/indra/llimage/llimagebmp.h
@@ -40,15 +40,15 @@ public:
 	LLImageBMP();
 
 	/*virtual*/ std::string getExtension() { return std::string("bmp"); }
-	/*virtual*/ BOOL updateData();
-	/*virtual*/ BOOL decode(LLImageRaw* raw_image, F32 decode_time);
-	/*virtual*/ BOOL encode(const LLImageRaw* raw_image, F32 encode_time);
+	/*virtual*/ bool updateData();
+	/*virtual*/ bool decode(LLImageRaw* raw_image, F32 decode_time);
+	/*virtual*/ bool encode(const LLImageRaw* raw_image, F32 encode_time);
 
 protected:
-	BOOL		decodeColorTable8( U8* dst, U8* src );
-	BOOL		decodeColorMask16( U8* dst, U8* src );
-	BOOL		decodeTruecolor24( U8* dst, U8* src );
-	BOOL		decodeColorMask32( U8* dst, U8* src );
+	bool		decodeColorTable8( U8* dst, U8* src );
+	bool		decodeColorMask16( U8* dst, U8* src );
+	bool		decodeTruecolor24( U8* dst, U8* src );
+	bool		decodeColorMask32( U8* dst, U8* src );
 
 	U32			countTrailingZeros( U32 m );
 
@@ -58,7 +58,7 @@ protected:
 	S32			mBitmapOffset;
 	S32			mBitsPerPixel;
 	U32			mBitfieldMask[4]; // rgba
-	BOOL		mOriginAtTop;
+	bool		mOriginAtTop;
 };
 
 #endif
diff --git a/indra/llimage/llimagedxt.cpp b/indra/llimage/llimagedxt.cpp
index 04e0e752eb..0ec83415a0 100644
--- a/indra/llimage/llimagedxt.cpp
+++ b/indra/llimage/llimagedxt.cpp
@@ -172,7 +172,7 @@ LLImageDXT::~LLImageDXT()
 }
 
 // virtual
-BOOL LLImageDXT::updateData()
+bool LLImageDXT::updateData()
 {
 	resetLastError();
 
@@ -182,7 +182,7 @@ BOOL LLImageDXT::updateData()
 	if (!data || !data_size)
 	{
 		setLastError("LLImageDXT uninitialized");
-		return FALSE;
+		return false;
 	}
 
 	S32 width, height, miplevelmax;
@@ -216,7 +216,7 @@ BOOL LLImageDXT::updateData()
 	discard = llmin(discard, miplevelmax);
 	setDiscardLevel(discard);
 
-	return TRUE;
+	return true;
 }
 
 // discard: 0 = largest (last) mip
@@ -257,7 +257,7 @@ void LLImageDXT::setFormat()
 }
 		
 // virtual
-BOOL LLImageDXT::decode(LLImageRaw* raw_image, F32 time)
+bool LLImageDXT::decode(LLImageRaw* raw_image, F32 time)
 {
 	// *TODO: Test! This has been tweaked since its intial inception,
 	//  but we don't use it any more!
@@ -266,7 +266,7 @@ BOOL LLImageDXT::decode(LLImageRaw* raw_image, F32 time)
 	if (mFileFormat >= FORMAT_DXT1 && mFileFormat <= FORMAT_DXR5)
 	{
 		LL_WARNS() << "Attempt to decode compressed LLImageDXT to Raw (unsupported)" << LL_ENDL;
-		return FALSE;
+		return false;
 	}
 	
 	S32 width = getWidth(), height = getHeight();
@@ -286,16 +286,16 @@ BOOL LLImageDXT::decode(LLImageRaw* raw_image, F32 time)
 	if ((!getData()) || (data + image_size > getData() + getDataSize()))
 	{
 		setLastError("LLImageDXT trying to decode an image with not enough data!");
-		return FALSE;
+		return false;
 	}
 
 	raw_image->resize(width, height, ncomponents);
 	memcpy(raw_image->getData(), data, image_size);	/* Flawfinder: ignore */
 
-	return TRUE;
+	return true;
 }
 
-BOOL LLImageDXT::getMipData(LLPointer<LLImageRaw>& raw, S32 discard)
+bool LLImageDXT::getMipData(LLPointer<LLImageRaw>& raw, S32 discard)
 {
 	if (discard < 0)
 	{
@@ -310,10 +310,10 @@ BOOL LLImageDXT::getMipData(LLPointer<LLImageRaw>& raw, S32 discard)
 	S32 height = 0;
 	calcDiscardWidthHeight(discard, mFileFormat, width, height);
 	raw = new LLImageRaw(data, width, height, getComponents());
-	return TRUE;
+	return true;
 }
 
-BOOL LLImageDXT::encodeDXT(const LLImageRaw* raw_image, F32 time, bool explicit_mips)
+bool LLImageDXT::encodeDXT(const LLImageRaw* raw_image, F32 time, bool explicit_mips)
 {
 	llassert_always(raw_image);
 	
@@ -395,11 +395,11 @@ BOOL LLImageDXT::encodeDXT(const LLImageRaw* raw_image, F32 time, bool explicit_
 		prev_mipdata = mipdata;
 	}
 	
-	return TRUE;
+	return true;
 }
 
 // virtual
-BOOL LLImageDXT::encode(const LLImageRaw* raw_image, F32 time)
+bool LLImageDXT::encode(const LLImageRaw* raw_image, F32 time)
 {
 	return encodeDXT(raw_image, time, false);
 }
diff --git a/indra/llimage/llimagedxt.h b/indra/llimage/llimagedxt.h
index a8756ba8ed..a4a9bcf99c 100644
--- a/indra/llimage/llimagedxt.h
+++ b/indra/llimage/llimagedxt.h
@@ -93,21 +93,21 @@ protected:
 	/*virtual*/ ~LLImageDXT();
 
 private:
-	BOOL encodeDXT(const LLImageRaw* raw_image, F32 decode_time, bool explicit_mips);
+	bool encodeDXT(const LLImageRaw* raw_image, F32 decode_time, bool explicit_mips);
 	
 public:
 	LLImageDXT();
 
 	/*virtual*/ std::string getExtension() { return std::string("dxt"); }
-	/*virtual*/ BOOL updateData();
+	/*virtual*/ bool updateData();
 
-	/*virtual*/ BOOL decode(LLImageRaw* raw_image, F32 decode_time);
-	/*virtual*/ BOOL encode(const LLImageRaw* raw_image, F32 encode_time);
+	/*virtual*/ bool decode(LLImageRaw* raw_image, F32 decode_time);
+	/*virtual*/ bool encode(const LLImageRaw* raw_image, F32 encode_time);
 
 	/*virtual*/ S32 calcHeaderSize();
 	/*virtual*/ S32 calcDataSize(S32 discard_level = 0);
 
-	BOOL getMipData(LLPointer<LLImageRaw>& raw, S32 discard=-1);
+	bool getMipData(LLPointer<LLImageRaw>& raw, S32 discard=-1);
 	
 	void setFormat();
 	S32 getMipOffset(S32 discard);
diff --git a/indra/llimage/llimagej2c.cpp b/indra/llimage/llimagej2c.cpp
index 913313bf15..68694496bc 100644
--- a/indra/llimage/llimagej2c.cpp
+++ b/indra/llimage/llimagej2c.cpp
@@ -56,7 +56,7 @@ LLImageJ2C::LLImageJ2C() : 	LLImageFormatted(IMG_CODEC_J2C),
 							mMaxBytes(0),
 							mRawDiscardLevel(-1),
 							mRate(DEFAULT_COMPRESSION_RATE),
-							mReversible(FALSE),
+							mReversible(false),
 							mAreaUsedForDataSizeCalcs(0)
 {
 	mImpl.reset(fallbackCreateLLImageJ2CImpl());
@@ -103,16 +103,16 @@ S8  LLImageJ2C::getRawDiscardLevel()
 	return mRawDiscardLevel;
 }
 
-BOOL LLImageJ2C::updateData()
+bool LLImageJ2C::updateData()
 {
-	BOOL res = TRUE;
+	bool res = true;
 	resetLastError();
 
 	// Check to make sure that this instance has been initialized with data
 	if (!getData() || (getDataSize() < 16))
 	{
 		setLastError("LLImageJ2C uninitialized");
-		res = FALSE;
+		res = false;
 	}
 	else 
 	{
@@ -134,29 +134,29 @@ BOOL LLImageJ2C::updateData()
 	return res;
 }
 
-BOOL LLImageJ2C::initDecode(LLImageRaw &raw_image, int discard_level, int* region)
+bool LLImageJ2C::initDecode(LLImageRaw &raw_image, int discard_level, int* region)
 {
 	setDiscardLevel(discard_level != -1 ? discard_level : 0);
 	return mImpl->initDecode(*this,raw_image,discard_level,region);
 }
 
-BOOL LLImageJ2C::initEncode(LLImageRaw &raw_image, int blocks_size, int precincts_size, int levels)
+bool LLImageJ2C::initEncode(LLImageRaw &raw_image, int blocks_size, int precincts_size, int levels)
 {
 	return mImpl->initEncode(*this,raw_image,blocks_size,precincts_size,levels);
 }
 
-BOOL LLImageJ2C::decode(LLImageRaw *raw_imagep, F32 decode_time)
+bool LLImageJ2C::decode(LLImageRaw *raw_imagep, F32 decode_time)
 {
 	return decodeChannels(raw_imagep, decode_time, 0, 4);
 }
 
 
-// Returns TRUE to mean done, whether successful or not.
-BOOL LLImageJ2C::decodeChannels(LLImageRaw *raw_imagep, F32 decode_time, S32 first_channel, S32 max_channel_count )
+// Returns true to mean done, whether successful or not.
+bool LLImageJ2C::decodeChannels(LLImageRaw *raw_imagep, F32 decode_time, S32 first_channel, S32 max_channel_count )
 {
 	LLTimer elapsed;
 
-	BOOL res = TRUE;
+	bool res = true;
 	
 	resetLastError();
 
@@ -164,13 +164,13 @@ BOOL LLImageJ2C::decodeChannels(LLImageRaw *raw_imagep, F32 decode_time, S32 fir
 	if (!getData() || (getDataSize() < 16))
 	{
 		setLastError("LLImageJ2C uninitialized");
-		res = TRUE; // done
+		res = true; // done
 	}
 	else
 	{
 		// Update the raw discard level
 		updateRawDiscardLevel();
-		mDecoding = TRUE;
+		mDecoding = true;
 		res = mImpl->decodeImpl(*this, *raw_imagep, decode_time, first_channel, max_channel_count);
 	}
 	
@@ -183,7 +183,7 @@ BOOL LLImageJ2C::decodeChannels(LLImageRaw *raw_imagep, F32 decode_time, S32 fir
 		}
 		else
 		{
-			mDecoding = FALSE;
+			mDecoding = false;
 		}
 	}
 
@@ -202,7 +202,7 @@ BOOL LLImageJ2C::decodeChannels(LLImageRaw *raw_imagep, F32 decode_time, S32 fir
 		tester->updateDecompressionStats(elapsed.getElapsedTimeF32()) ;
 		if (res)
 		{
-			// The whole data stream is finally decompressed when res is returned as TRUE
+			// The whole data stream is finally decompressed when res is returned as true
 			tester->updateDecompressionStats(this->getDataSize(), raw_imagep->getDataSize()) ;
 		}
 	}
@@ -211,17 +211,17 @@ BOOL LLImageJ2C::decodeChannels(LLImageRaw *raw_imagep, F32 decode_time, S32 fir
 }
 
 
-BOOL LLImageJ2C::encode(const LLImageRaw *raw_imagep, F32 encode_time)
+bool LLImageJ2C::encode(const LLImageRaw *raw_imagep, F32 encode_time)
 {
 	return encode(raw_imagep, NULL, encode_time);
 }
 
 
-BOOL LLImageJ2C::encode(const LLImageRaw *raw_imagep, const char* comment_text, F32 encode_time)
+bool LLImageJ2C::encode(const LLImageRaw *raw_imagep, const char* comment_text, F32 encode_time)
 {
 	LLTimer elapsed;
 	resetLastError();
-	BOOL res = mImpl->encodeImpl(*this, *raw_imagep, comment_text, encode_time, mReversible);
+	bool res = mImpl->encodeImpl(*this, *raw_imagep, comment_text, encode_time, mReversible);
 	if (!mLastError.empty())
 	{
 		LLImage::setLastError(mLastError);
@@ -237,7 +237,7 @@ BOOL LLImageJ2C::encode(const LLImageRaw *raw_imagep, const char* comment_text,
 		tester->updateCompressionStats(elapsed.getElapsedTimeF32()) ;
 		if (res)
 		{
-			// The whole data stream is finally compressed when res is returned as TRUE
+			// The whole data stream is finally compressed when res is returned as true
 			tester->updateCompressionStats(this->getDataSize(), raw_imagep->getDataSize()) ;
 		}
 	}
@@ -340,15 +340,15 @@ void LLImageJ2C::setMaxBytes(S32 max_bytes)
 	mMaxBytes = max_bytes;
 }
 
-void LLImageJ2C::setReversible(const BOOL reversible)
+void LLImageJ2C::setReversible(const bool reversible)
 {
  	mReversible = reversible;
 }
 
 
-BOOL LLImageJ2C::loadAndValidate(const std::string &filename)
+bool LLImageJ2C::loadAndValidate(const std::string &filename)
 {
-	BOOL res = TRUE;
+	bool res = true;
 	
 	resetLastError();
 
@@ -359,12 +359,12 @@ BOOL LLImageJ2C::loadAndValidate(const std::string &filename)
 	if (!apr_file)
 	{
 		setLastError("Unable to open file for reading", filename);
-		res = FALSE;
+		res = false;
 	}
 	else if (file_size == 0)
 	{
 		setLastError("File is empty",filename);
-		res = FALSE;
+		res = false;
 	}
 	else
 	{
@@ -377,7 +377,7 @@ BOOL LLImageJ2C::loadAndValidate(const std::string &filename)
 		{
 			FREE_MEM(LLImageBase::getPrivatePool(), data);
 			setLastError("Unable to read entire file");
-			res = FALSE;
+			res = false;
 		}
 		else
 		{
@@ -394,21 +394,21 @@ BOOL LLImageJ2C::loadAndValidate(const std::string &filename)
 }
 
 
-BOOL LLImageJ2C::validate(U8 *data, U32 file_size)
+bool LLImageJ2C::validate(U8 *data, U32 file_size)
 {
 
 	resetLastError();
 	
 	setData(data, file_size);
 
-	BOOL res = updateData();
+	bool res = updateData();
 	if ( res )
 	{
 		// Check to make sure that this instance has been initialized with data
 		if (!getData() || (0 == getDataSize()))
 		{
 			setLastError("LLImageJ2C uninitialized");
-			res = FALSE;
+			res = false;
 		}
 		else
 		{
@@ -425,7 +425,7 @@ BOOL LLImageJ2C::validate(U8 *data, U32 file_size)
 
 void LLImageJ2C::decodeFailed()
 {
-	mDecoding = FALSE;
+	mDecoding = false;
 }
 
 void LLImageJ2C::updateRawDiscardLevel()
diff --git a/indra/llimage/llimagej2c.h b/indra/llimage/llimagej2c.h
index bfaccdfd05..44aff98494 100644
--- a/indra/llimage/llimagej2c.h
+++ b/indra/llimage/llimagej2c.h
@@ -48,10 +48,10 @@ public:
 
 	// Base class overrides
 	/*virtual*/ std::string getExtension() { return std::string("j2c"); }
-	/*virtual*/ BOOL updateData();
-	/*virtual*/ BOOL decode(LLImageRaw *raw_imagep, F32 decode_time);
-	/*virtual*/ BOOL decodeChannels(LLImageRaw *raw_imagep, F32 decode_time, S32 first_channel, S32 max_channel_count);
-	/*virtual*/ BOOL encode(const LLImageRaw *raw_imagep, F32 encode_time);
+	/*virtual*/ bool updateData();
+	/*virtual*/ bool decode(LLImageRaw *raw_imagep, F32 decode_time);
+	/*virtual*/ bool decodeChannels(LLImageRaw *raw_imagep, F32 decode_time, S32 first_channel, S32 max_channel_count);
+	/*virtual*/ bool encode(const LLImageRaw *raw_imagep, F32 encode_time);
 	/*virtual*/ S32 calcHeaderSize();
 	/*virtual*/ S32 calcDataSize(S32 discard_level = 0);
 	/*virtual*/ S32 calcDiscardLevelBytes(S32 bytes);
@@ -60,17 +60,17 @@ public:
 	/*virtual*/ void resetLastError();
 	/*virtual*/ void setLastError(const std::string& message, const std::string& filename = std::string());
 	
-	BOOL initDecode(LLImageRaw &raw_image, int discard_level, int* region);
-	BOOL initEncode(LLImageRaw &raw_image, int blocks_size, int precincts_size, int levels);
+	bool initDecode(LLImageRaw &raw_image, int discard_level, int* region);
+	bool initEncode(LLImageRaw &raw_image, int blocks_size, int precincts_size, int levels);
 	
 	// Encode with comment text 
-	BOOL encode(const LLImageRaw *raw_imagep, const char* comment_text, F32 encode_time=0.0);
+	bool encode(const LLImageRaw *raw_imagep, const char* comment_text, F32 encode_time=0.0);
 
-	BOOL validate(U8 *data, U32 file_size);
-	BOOL loadAndValidate(const std::string &filename);
+	bool validate(U8 *data, U32 file_size);
+	bool loadAndValidate(const std::string &filename);
 
 	// Encode accessors
-	void setReversible(const BOOL reversible); // Use non-lossy?
+	void setReversible(const bool reversible); // Use non-lossy?
 	void setMaxBytes(S32 max_bytes);
 	S32 getMaxBytes() const { return mMaxBytes; }
 
@@ -94,7 +94,7 @@ protected:
 
 	S8  mRawDiscardLevel;
 	F32 mRate;
-	BOOL mReversible;
+	bool mReversible;
 	boost::scoped_ptr<LLImageJ2CImpl> mImpl;
 	std::string mLastError;
 
@@ -112,18 +112,18 @@ protected:
 	// Return value:
 	// true: image size and number of channels was determined
 	// false: error on decode
-	virtual BOOL getMetadata(LLImageJ2C &base) = 0;
+	virtual bool getMetadata(LLImageJ2C &base) = 0;
 	// Decode the raw image optionally aborting (to continue later) after
 	// decode_time seconds.  Decode at most max_channel_count and start
 	// decoding channel first_channel.
 	// Return value:
 	// true: decoding complete (even if it failed)
 	// false: time expired while decoding
-	virtual BOOL decodeImpl(LLImageJ2C &base, LLImageRaw &raw_image, F32 decode_time, S32 first_channel, S32 max_channel_count) = 0;
-	virtual BOOL encodeImpl(LLImageJ2C &base, const LLImageRaw &raw_image, const char* comment_text, F32 encode_time=0.0,
-							BOOL reversible=FALSE) = 0;
-	virtual BOOL initDecode(LLImageJ2C &base, LLImageRaw &raw_image, int discard_level = -1, int* region = NULL) = 0;
-	virtual BOOL initEncode(LLImageJ2C &base, LLImageRaw &raw_image, int blocks_size = -1, int precincts_size = -1, int levels = 0) = 0;
+	virtual bool decodeImpl(LLImageJ2C &base, LLImageRaw &raw_image, F32 decode_time, S32 first_channel, S32 max_channel_count) = 0;
+	virtual bool encodeImpl(LLImageJ2C &base, const LLImageRaw &raw_image, const char* comment_text, F32 encode_time=0.0,
+							bool reversible=false) = 0;
+	virtual bool initDecode(LLImageJ2C &base, LLImageRaw &raw_image, int discard_level = -1, int* region = NULL) = 0;
+	virtual bool initEncode(LLImageJ2C &base, LLImageRaw &raw_image, int blocks_size = -1, int precincts_size = -1, int levels = 0) = 0;
 
 	virtual std::string getEngineInfo() const = 0;
 
diff --git a/indra/llimage/llimagejpeg.cpp b/indra/llimage/llimagejpeg.cpp
index e419c77ff2..60b2d0faa5 100644
--- a/indra/llimage/llimagejpeg.cpp
+++ b/indra/llimage/llimagejpeg.cpp
@@ -45,7 +45,7 @@ LLImageJPEG::~LLImageJPEG()
 	delete[] mOutputBuffer;
 }
 
-BOOL LLImageJPEG::updateData()
+bool LLImageJPEG::updateData()
 {
 	resetLastError();
 
@@ -53,7 +53,7 @@ BOOL LLImageJPEG::updateData()
 	if (!getData() || (0 == getDataSize()))
 	{
 		setLastError("Uninitialized instance of LLImageJPEG");
-		return FALSE;
+		return false;
 	}
 
 	////////////////////////////////////////
@@ -79,7 +79,7 @@ BOOL LLImageJPEG::updateData()
 	if(setjmp(sSetjmpBuffer))
 	{
 		jpeg_destroy_decompress(&cinfo);
-		return FALSE;
+		return false;
 	}
 	try
 	{
@@ -106,7 +106,7 @@ BOOL LLImageJPEG::updateData()
 		
 		////////////////////////////////////////
 		// Step 3: read file parameters with jpeg_read_header()
-		jpeg_read_header( &cinfo, TRUE );
+		jpeg_read_header( &cinfo, true );
 
 		// Data set by jpeg_read_header
 		setSize(cinfo.image_width, cinfo.image_height, 3); // Force to 3 components (RGB)
@@ -115,13 +115,13 @@ BOOL LLImageJPEG::updateData()
 		// More data set by jpeg_read_header
 		cinfo.num_components;
 		cinfo.jpeg_color_space;	// Colorspace of image
-		cinfo.saw_JFIF_marker;		// TRUE if a JFIF APP0 marker was seen
+		cinfo.saw_JFIF_marker;		// true if a JFIF APP0 marker was seen
 		cinfo.JFIF_major_version;	// Version information from JFIF marker
 		cinfo.JFIF_minor_version;  //
 		cinfo.density_unit;		// Resolution data from JFIF marker
 		cinfo.X_density;
 		cinfo.Y_density;
-		cinfo.saw_Adobe_marker;	// TRUE if an Adobe APP14 marker was seen
+		cinfo.saw_Adobe_marker;	// true if an Adobe APP14 marker was seen
 		cinfo.Adobe_transform;     // Color transform code from Adobe marker
 		*/
 	}
@@ -129,13 +129,13 @@ BOOL LLImageJPEG::updateData()
 	{
 		jpeg_destroy_decompress(&cinfo);
 
-		return FALSE;
+		return false;
 	}
 	////////////////////////////////////////
 	// Step 4: Release JPEG decompression object 
 	jpeg_destroy_decompress(&cinfo);
 
-	return TRUE;
+	return true;
 }
 
 // Initialize source --- called by jpeg_read_header
@@ -154,7 +154,7 @@ boolean LLImageJPEG::decodeFillInputBuffer( j_decompress_ptr cinfo )
 	// Should never get here, since we provide the entire buffer up front.
 	ERREXIT(cinfo, JERR_INPUT_EMPTY);
 
-	return TRUE;
+	return true;
 }
 
 // Skip data --- used to skip over a potentially large amount of
@@ -182,7 +182,7 @@ void LLImageJPEG::decodeTermSource (j_decompress_ptr cinfo)
 
 
 // Returns true when done, whether or not decode was successful.
-BOOL LLImageJPEG::decode(LLImageRaw* raw_image, F32 decode_time)
+bool LLImageJPEG::decode(LLImageRaw* raw_image, F32 decode_time)
 {
 	llassert_always(raw_image);
 	
@@ -192,7 +192,7 @@ BOOL LLImageJPEG::decode(LLImageRaw* raw_image, F32 decode_time)
 	if (!getData() || (0 == getDataSize()))
 	{
 		setLastError("LLImageJPEG trying to decode an image with no data!");
-		return TRUE;  // done
+		return true;  // done
 	}
 	
 	S32 row_stride = 0;
@@ -220,7 +220,7 @@ BOOL LLImageJPEG::decode(LLImageRaw* raw_image, F32 decode_time)
 	if(setjmp(sSetjmpBuffer))
 	{
 		jpeg_destroy_decompress(&cinfo);
-		return TRUE; // done
+		return true; // done
 	}
 	try
 	{
@@ -247,11 +247,11 @@ BOOL LLImageJPEG::decode(LLImageRaw* raw_image, F32 decode_time)
 		////////////////////////////////////////
 		// Step 3: read file parameters with jpeg_read_header()
 		
-		jpeg_read_header(&cinfo, TRUE);
+		jpeg_read_header(&cinfo, true);
 
 		// We can ignore the return value from jpeg_read_header since
 		//   (a) suspension is not possible with our data source, and
-		//   (b) we passed TRUE to reject a tables-only JPEG file as an error.
+		//   (b) we passed true to reject a tables-only JPEG file as an error.
 		// See libjpeg.doc for more info.
 
 		setSize(cinfo.image_width, cinfo.image_height, 3); // Force to 3 components (RGB)
@@ -314,7 +314,7 @@ BOOL LLImageJPEG::decode(LLImageRaw* raw_image, F32 decode_time)
 	catch (int)
 	{
 		jpeg_destroy_decompress(&cinfo);
-		return TRUE; // done
+		return true; // done
 	}
 
 	// Check to see whether any corrupt-data warnings occurred
@@ -322,10 +322,10 @@ BOOL LLImageJPEG::decode(LLImageRaw* raw_image, F32 decode_time)
 	{
 		// TODO: extract the warning to find out what went wrong.
 		setLastError( "Unable to decode JPEG image.");
-		return TRUE; // done
+		return true; // done
 	}
 
-	return TRUE;
+	return true;
 }
 
 
@@ -344,11 +344,11 @@ void LLImageJPEG::encodeInitDestination ( j_compress_ptr cinfo )
 // 
 //  In typical applications, this should write the entire output buffer
 //  (ignoring the current state of next_output_byte & free_in_buffer),
-//  reset the pointer & count to the start of the buffer, and return TRUE
+//  reset the pointer & count to the start of the buffer, and return true
 //  indicating that the buffer has been dumped.
 // 
 //  In applications that need to be able to suspend compression due to output
-//  overrun, a FALSE return indicates that the buffer cannot be emptied now.
+//  overrun, a false return indicates that the buffer cannot be emptied now.
 //  In this situation, the compressor will return to its caller (possibly with
 //  an indication that it has not accepted all the supplied scanlines).  The
 //  application should resume compression after it has made more room in the
@@ -357,7 +357,7 @@ void LLImageJPEG::encodeInitDestination ( j_compress_ptr cinfo )
 // 
 //  When suspending, the compressor will back up to a convenient restart point
 //  (typically the start of the current MCU). next_output_byte & free_in_buffer
-//  indicate where the restart point will be if the current call returns FALSE.
+//  indicate where the restart point will be if the current call returns false.
 //  Data beyond this point will be regenerated after resumption, so do not
 //  write it out when emptying the buffer externally.
 
@@ -374,7 +374,7 @@ boolean LLImageJPEG::encodeEmptyOutputBuffer( j_compress_ptr cinfo )
   if (!new_buffer)
   {
   	LL_ERRS() << "Out of memory in LLImageJPEG::encodeEmptyOutputBuffer( j_compress_ptr cinfo )" << LL_ENDL;
-  	return FALSE;
+  	return false;
   }
   memcpy( new_buffer, self->mOutputBuffer, self->mOutputBufferSize );	/* Flawfinder: ignore */
   delete[] self->mOutputBuffer;
@@ -386,7 +386,7 @@ boolean LLImageJPEG::encodeEmptyOutputBuffer( j_compress_ptr cinfo )
   self->mOutputBufferSize = new_buffer_size;
   self->claimMem(new_buffer_size);
 
-  return TRUE;
+  return true;
 }
 
 //  Terminate destination --- called by jpeg_finish_compress
@@ -465,11 +465,11 @@ void LLImageJPEG::errorOutputMessage( j_common_ptr cinfo )
 	std::string error = buffer ;
 	LLImage::setLastError(error);
 
-	BOOL is_decode = (cinfo->is_decompressor != 0);
+	bool is_decode = (cinfo->is_decompressor != 0);
 	LL_WARNS() << "LLImageJPEG " << (is_decode ? "decode " : "encode ") << " failed: " << buffer << LL_ENDL;
 }
 
-BOOL LLImageJPEG::encode( const LLImageRaw* raw_image, F32 encode_time )
+bool LLImageJPEG::encode( const LLImageRaw* raw_image, F32 encode_time )
 {
 	llassert_always(raw_image);
 	
@@ -482,7 +482,7 @@ BOOL LLImageJPEG::encode( const LLImageRaw* raw_image, F32 encode_time )
 		break;
 	default:
 		setLastError("Unable to encode a JPEG image that doesn't have 1 or 3 components.");
-		return FALSE;
+		return false;
 	}
 
 	setSize(raw_image->getWidth(), raw_image->getHeight(), raw_image->getComponents());
@@ -531,7 +531,7 @@ BOOL LLImageJPEG::encode( const LLImageRaw* raw_image, F32 encode_time )
 		mOutputBuffer = NULL;
 		disclaimMem(mOutputBufferSize);
 		mOutputBufferSize = 0;
-		return FALSE;
+		return false;
 	}
 
 	try
@@ -576,7 +576,7 @@ BOOL LLImageJPEG::encode( const LLImageRaw* raw_image, F32 encode_time )
 			break;
 		default:
 			setLastError("Unable to encode a JPEG image that doesn't have 1 or 3 components.");
-			return FALSE;
+			return false;
 		}
 
 		// Now use the library's routine to set default compression parameters.
@@ -585,15 +585,15 @@ BOOL LLImageJPEG::encode( const LLImageRaw* raw_image, F32 encode_time )
 		jpeg_set_defaults(&cinfo);
 
 		// Now you can set any non-default parameters you wish to.
-		jpeg_set_quality(&cinfo, mEncodeQuality, TRUE );  // limit to baseline-JPEG values
+		jpeg_set_quality(&cinfo, mEncodeQuality, true );  // limit to baseline-JPEG values
 
 		////////////////////////////////////////
 		// Step 4: Start compressor 
 		//
-		// TRUE ensures that we will write a complete interchange-JPEG file.
-		// Pass TRUE unless you are very sure of what you're doing.
+		// true ensures that we will write a complete interchange-JPEG file.
+		// Pass true unless you are very sure of what you're doing.
    
-		jpeg_start_compress(&cinfo, TRUE);
+		jpeg_start_compress(&cinfo, true);
 
 		////////////////////////////////////////
 		// Step 5: while (scan lines remain to be written) 
@@ -647,8 +647,8 @@ BOOL LLImageJPEG::encode( const LLImageRaw* raw_image, F32 encode_time )
 		mOutputBuffer = NULL;
 		disclaimMem(mOutputBufferSize);
 		mOutputBufferSize = 0;
-		return FALSE;
+		return false;
 	}
 
-	return TRUE;
+	return true;
 }
diff --git a/indra/llimage/llimagejpeg.h b/indra/llimage/llimagejpeg.h
index 2142660c81..7a849a8421 100644
--- a/indra/llimage/llimagejpeg.h
+++ b/indra/llimage/llimagejpeg.h
@@ -51,9 +51,9 @@ public:
 	LLImageJPEG(S32 quality = 75);
 
 	/*virtual*/ std::string getExtension() { return std::string("jpg"); }
-	/*virtual*/ BOOL updateData();
-	/*virtual*/ BOOL decode(LLImageRaw* raw_image, F32 decode_time);
-	/*virtual*/ BOOL encode(const LLImageRaw* raw_image, F32 encode_time);
+	/*virtual*/ bool updateData();
+	/*virtual*/ bool decode(LLImageRaw* raw_image, F32 decode_time);
+	/*virtual*/ bool encode(const LLImageRaw* raw_image, F32 encode_time);
 
 	void			setEncodeQuality( S32 q )	{ mEncodeQuality = q; } // on a scale from 1 to 100
 	S32				getEncodeQuality()			{ return mEncodeQuality; }
@@ -73,7 +73,7 @@ public:
 	static void		errorEmitMessage(j_common_ptr cinfo, int msg_level);
 	static void		errorOutputMessage(j_common_ptr cinfo);
 
-	static BOOL		decompress(LLImageJPEG* imagep);
+	static bool		decompress(LLImageJPEG* imagep);
 
 protected:
 	U8*				mOutputBuffer;		// temp buffer used during encoding
diff --git a/indra/llimage/llimagepng.cpp b/indra/llimage/llimagepng.cpp
index 7735dc1379..a299602d79 100644
--- a/indra/llimage/llimagepng.cpp
+++ b/indra/llimage/llimagepng.cpp
@@ -47,7 +47,7 @@ LLImagePNG::~LLImagePNG()
 // Virtual
 // Parse PNG image information and set the appropriate
 // width, height and component (channel) information.
-BOOL LLImagePNG::updateData()
+bool LLImagePNG::updateData()
 {
     resetLastError();
 
@@ -55,7 +55,7 @@ BOOL LLImagePNG::updateData()
     if (!getData() || (0 == getDataSize()))
     {
         setLastError("Uninitialized instance of LLImagePNG");
-        return FALSE;
+        return false;
     }
 
 	// Decode the PNG data and extract sizing information
@@ -63,25 +63,25 @@ BOOL LLImagePNG::updateData()
 	if (!pngWrapper.isValidPng(getData()))
 	{
 		setLastError("LLImagePNG data does not have a valid PNG header!");
-		return FALSE;
+		return false;
 	}
 
 	LLPngWrapper::ImageInfo infop;
 	if (! pngWrapper.readPng(getData(), getDataSize(), NULL, &infop))
 	{
 		setLastError(pngWrapper.getErrorMessage());
-		return FALSE;
+		return false;
 	}
 
 	setSize(infop.mWidth, infop.mHeight, infop.mComponents);
 
-	return TRUE;
+	return true;
 }
 
 // Virtual
 // Decode an in-memory PNG image into the raw RGB or RGBA format
 // used within SecondLife.
-BOOL LLImagePNG::decode(LLImageRaw* raw_image, F32 decode_time)
+bool LLImagePNG::decode(LLImageRaw* raw_image, F32 decode_time)
 {
 	llassert_always(raw_image);
 
@@ -91,7 +91,7 @@ BOOL LLImagePNG::decode(LLImageRaw* raw_image, F32 decode_time)
     if (!getData() || (0 == getDataSize()))
     {
         setLastError("LLImagePNG trying to decode an image with no data!");
-        return FALSE;
+        return false;
     }
 
 	// Decode the PNG data into the raw image
@@ -99,21 +99,21 @@ BOOL LLImagePNG::decode(LLImageRaw* raw_image, F32 decode_time)
 	if (!pngWrapper.isValidPng(getData()))
 	{
 		setLastError("LLImagePNG data does not have a valid PNG header!");
-		return FALSE;
+		return false;
 	}
 
 	if (! pngWrapper.readPng(getData(), getDataSize(), raw_image))
 	{
 		setLastError(pngWrapper.getErrorMessage());
-		return FALSE;
+		return false;
 	}
 
-	return TRUE;
+	return true;
 }
 
 // Virtual
 // Encode the in memory RGB image into PNG format.
-BOOL LLImagePNG::encode(const LLImageRaw* raw_image, F32 encode_time)
+bool LLImagePNG::encode(const LLImageRaw* raw_image, F32 encode_time)
 {
 	llassert_always(raw_image);
 
@@ -133,7 +133,7 @@ BOOL LLImagePNG::encode(const LLImageRaw* raw_image, F32 encode_time)
 	{
 		setLastError(pngWrapper.getErrorMessage());
 		delete[] tmpWriteBuffer;
-		return FALSE;
+		return false;
 	}
 
 	// Resize internal buffer and copy from temp
@@ -143,6 +143,6 @@ BOOL LLImagePNG::encode(const LLImageRaw* raw_image, F32 encode_time)
 
 	delete[] tmpWriteBuffer;
 
-	return TRUE;
+	return true;
 }
 
diff --git a/indra/llimage/llimagepng.h b/indra/llimage/llimagepng.h
index 1fbd850a2e..ef16f2996f 100644
--- a/indra/llimage/llimagepng.h
+++ b/indra/llimage/llimagepng.h
@@ -38,9 +38,9 @@ public:
 	LLImagePNG();
 
 	/*virtual*/ std::string getExtension() { return std::string("png"); }
-	/*virtual*/ BOOL updateData();
-	/*virtual*/ BOOL decode(LLImageRaw* raw_image, F32 decode_time);
-	/*virtual*/ BOOL encode(const LLImageRaw* raw_image, F32 encode_time);
+	/*virtual*/ bool updateData();
+	/*virtual*/ bool decode(LLImageRaw* raw_image, F32 decode_time);
+	/*virtual*/ bool encode(const LLImageRaw* raw_image, F32 encode_time);
 };
 
 #endif
diff --git a/indra/llimage/llimagetga.cpp b/indra/llimage/llimagetga.cpp
index d0ae105ba7..5ad7658ec1 100644
--- a/indra/llimage/llimagetga.cpp
+++ b/indra/llimage/llimagetga.cpp
@@ -61,7 +61,7 @@ LLImageTGA::LLImageTGA()
 	  mColorMapStart( 0 ),
 	  mColorMapLength( 0 ),
 	  mColorMapBytesPerEntry( 0 ),
-	  mIs15Bit( FALSE ),
+	  mIs15Bit( false ),
 
 	  mAttributeBits(0),
 	  mColorMapDepth(0),
@@ -94,7 +94,7 @@ LLImageTGA::LLImageTGA(const std::string& file_name)
 	  mColorMapStart( 0 ),
 	  mColorMapLength( 0 ),
 	  mColorMapBytesPerEntry( 0 ),
-	  mIs15Bit( FALSE )
+	  mIs15Bit( false )
 {
 	loadFile(file_name);
 }
@@ -104,7 +104,7 @@ LLImageTGA::~LLImageTGA()
 	delete [] mColorMap;
 }
 
-BOOL LLImageTGA::updateData()
+bool LLImageTGA::updateData()
 {
 	resetLastError();
 
@@ -112,7 +112,7 @@ BOOL LLImageTGA::updateData()
 	if (!getData() || (0 == getDataSize()))
 	{
 		setLastError("LLImageTGA uninitialized");
-		return FALSE;
+		return false;
 	}
 	
 	// Pull image information from the header...
@@ -185,13 +185,13 @@ BOOL LLImageTGA::updateData()
 	case 0:
 		// No image data included in file
 		setLastError("Unable to load file.  TGA file contains no image data.");
-		return FALSE;
+		return false;
 	case 1:
 		// Colormapped uncompressed
 		if( 8 != mPixelSize )
 		{
 			setLastError("Unable to load file.  Colormapped images must have 8 bits per pixel.");
-			return FALSE;
+			return false;
 		}
 		break;
 	case 2:
@@ -202,7 +202,7 @@ BOOL LLImageTGA::updateData()
 		if( 8 != mPixelSize )
 		{
 			setLastError("Unable to load file.  Monochrome images must have 8 bits per pixel.");
-			return FALSE;
+			return false;
 		}
 		break;
 	case 9:
@@ -216,12 +216,12 @@ BOOL LLImageTGA::updateData()
 		if( 8 != mPixelSize )
 		{
 			setLastError("Unable to load file.  Monochrome images must have 8 bits per pixel.");
-			return FALSE;
+			return false;
 		}
 		break;
 	default:
 		setLastError("Unable to load file.  Unrecoginzed TGA image type.");
-		return FALSE;
+		return false;
 	}
 
 	// discard the ID field, if any
@@ -266,8 +266,8 @@ BOOL LLImageTGA::updateData()
 			mColorMap = new U8[ color_map_bytes ];  
 			if (!mColorMap)
 			{
-				LL_ERRS() << "Out of Memory in BOOL LLImageTGA::updateData()" << LL_ENDL;
-				return FALSE;
+				LL_ERRS() << "Out of Memory in bool LLImageTGA::updateData()" << LL_ENDL;
+				return false;
 			}
 			memcpy( mColorMap, getData() + mDataOffset, color_map_bytes );	/* Flawfinder: ignore */
 		}
@@ -302,28 +302,28 @@ BOOL LLImageTGA::updateData()
 //		if( mAttributeBits != 8 )
 //		{
 //			setLastError("Unable to load file. 32 bit TGA image does not have 8 bits of alpha.");
-//			return FALSE;
+//			return false;
 //		}
 		mAttributeBits = 8;
 		break;
 	case 15:
 	case 16:
 		components = 3;
-		mIs15Bit = TRUE;  // 16th bit is used for Targa hardware interupts and is ignored.
+		mIs15Bit = true;  // 16th bit is used for Targa hardware interupts and is ignored.
 		break;
 	case 8:
 		components = 1;
 		break;
 	default:
 		setLastError("Unable to load file. Unknown pixel size.");
-		return FALSE;
+		return false;
 	}
 	setSize(width, height, components);
 	
-	return TRUE;
+	return true;
 }
 
-BOOL LLImageTGA::decode(LLImageRaw* raw_image, F32 decode_time)
+bool LLImageTGA::decode(LLImageRaw* raw_image, F32 decode_time)
 {
 	llassert_always(raw_image);
 	
@@ -331,7 +331,7 @@ BOOL LLImageTGA::decode(LLImageRaw* raw_image, F32 decode_time)
 	if (!getData() || (0 == getDataSize()))
 	{
 		setLastError("LLImageTGA trying to decode an image with no data!");
-		return FALSE;
+		return false;
 	}
 
 	// Copy everything after the header.
@@ -343,18 +343,18 @@ BOOL LLImageTGA::decode(LLImageRaw* raw_image, F32 decode_time)
 		(getComponents() != 4) )
 	{
 		setLastError("TGA images with a number of components other than 1, 3, and 4 are not supported.");
-		return FALSE;
+		return false;
 	}
 
 
 	if( mOriginRightBit )
 	{
 		setLastError("TGA images with origin on right side are not supported.");
-		return FALSE;
+		return false;
 	}
 
-	BOOL flipped = (mOriginTopBit != 0);
-	BOOL rle_compressed = ((mImageType & 0x08) != 0);
+	bool flipped = (mOriginTopBit != 0);
+	bool rle_compressed = ((mImageType & 0x08) != 0);
 
 	if( mColorMap )
 	{
@@ -366,10 +366,10 @@ BOOL LLImageTGA::decode(LLImageRaw* raw_image, F32 decode_time)
 	}
 }
 
-BOOL LLImageTGA::decodeTruecolor( LLImageRaw* raw_image, BOOL rle, BOOL flipped )
+bool LLImageTGA::decodeTruecolor( LLImageRaw* raw_image, bool rle, bool flipped )
 {
-	BOOL success = FALSE;
-	BOOL alpha_opaque = FALSE;
+	bool success = false;
+	bool alpha_opaque = false;
 	if( rle )
 	{
 
@@ -404,7 +404,7 @@ BOOL LLImageTGA::decodeTruecolor( LLImageRaw* raw_image, BOOL rle, BOOL flipped
 	}
 	else
 	{
-		BOOL alpha_opaque;
+		bool alpha_opaque;
 		success = decodeTruecolorNonRle( raw_image, alpha_opaque );
 		if (alpha_opaque && raw_image->getComponents() == 4)
 		{
@@ -430,9 +430,9 @@ BOOL LLImageTGA::decodeTruecolor( LLImageRaw* raw_image, BOOL rle, BOOL flipped
 }
 
 
-BOOL LLImageTGA::decodeTruecolorNonRle( LLImageRaw* raw_image, BOOL &alpha_opaque )
+bool LLImageTGA::decodeTruecolorNonRle( LLImageRaw* raw_image, bool &alpha_opaque )
 {
-	alpha_opaque = TRUE;
+	alpha_opaque = true;
 
 	// Origin is the bottom left
 	U8* dst = raw_image->getData();
@@ -442,7 +442,7 @@ BOOL LLImageTGA::decodeTruecolorNonRle( LLImageRaw* raw_image, BOOL &alpha_opaqu
 	
 	if (pixels * (mIs15Bit ? 2 : getComponents()) > getDataSize() - mDataOffset)
 	{ //here we have situation when data size in src less than actually needed
-		return FALSE;
+		return false;
 	}
 
 	if (getComponents() == 4)
@@ -456,7 +456,7 @@ BOOL LLImageTGA::decodeTruecolorNonRle( LLImageRaw* raw_image, BOOL &alpha_opaqu
 			dst[3] = src[3]; // Alpha
 			if (dst[3] != 255)
 			{
-				alpha_opaque = FALSE;
+				alpha_opaque = false;
 			}
 			dst += 4;
 			src += 4;
@@ -490,7 +490,7 @@ BOOL LLImageTGA::decodeTruecolorNonRle( LLImageRaw* raw_image, BOOL &alpha_opaqu
 		memcpy(dst, src, pixels);	/* Flawfinder: ignore */
 	}
 
-	return TRUE;
+	return true;
 }
 
 void LLImageTGA::decodeColorMapPixel8( U8* dst, const U8* src )
@@ -523,14 +523,14 @@ void LLImageTGA::decodeColorMapPixel32( U8* dst, const U8* src )
 }
 
 
-BOOL LLImageTGA::decodeColorMap( LLImageRaw* raw_image, BOOL rle, BOOL flipped )
+bool LLImageTGA::decodeColorMap( LLImageRaw* raw_image, bool rle, bool flipped )
 {
 	// If flipped, origin is the top left.  Need to reverse the order of the rows.
 	// Otherwise the origin is the bottom left.
 
 	if( 8 != mPixelSize )
 	{
-		return FALSE;
+		return false;
 	}
 
 	U8* src = getData() + mDataOffset;
@@ -544,7 +544,7 @@ BOOL LLImageTGA::decodeColorMap( LLImageRaw* raw_image, BOOL rle, BOOL flipped )
 		case 2:	pixel_decoder = &LLImageTGA::decodeColorMapPixel15; break;
 		case 3:	pixel_decoder = &LLImageTGA::decodeColorMapPixel24; break;
 		case 4:	pixel_decoder = &LLImageTGA::decodeColorMapPixel32; break;
-		default: llassert(0); return FALSE;
+		default: llassert(0); return false;
 	}
 
 	if( rle )
@@ -613,12 +613,12 @@ BOOL LLImageTGA::decodeColorMap( LLImageRaw* raw_image, BOOL rle, BOOL flipped )
 		}
 	}
 
-	return TRUE;
+	return true;
 }
 
 
 
-BOOL LLImageTGA::encode(const LLImageRaw* raw_image, F32 encode_time)
+bool LLImageTGA::encode(const LLImageRaw* raw_image, F32 encode_time)
 {
 	llassert_always(raw_image);
 	
@@ -642,7 +642,7 @@ BOOL LLImageTGA::encode(const LLImageRaw* raw_image, F32 encode_time)
 		mImageType = 2;		
 		break;
 	default:
-		return FALSE;
+		return false;
 	}
 
 	// Color map stuff (unsupported)
@@ -678,7 +678,7 @@ BOOL LLImageTGA::encode(const LLImageRaw* raw_image, F32 encode_time)
 		bytes_per_pixel = 4;		
 		break;
 	default:
-		return FALSE;
+		return false;
 	}
 	mPixelSize = U8(bytes_per_pixel * 8);		// 8, 16, 24, 32 bits per pixel
 
@@ -765,13 +765,13 @@ BOOL LLImageTGA::encode(const LLImageRaw* raw_image, F32 encode_time)
 		break;
 	}
 	
-	return TRUE;
+	return true;
 }
 
-BOOL LLImageTGA::decodeTruecolorRle32( LLImageRaw* raw_image, BOOL &alpha_opaque )
+bool LLImageTGA::decodeTruecolorRle32( LLImageRaw* raw_image, bool &alpha_opaque )
 {
 	llassert( getComponents() == 4 );
-	alpha_opaque = TRUE;
+	alpha_opaque = true;
 
 	U8* dst = raw_image->getData();
 	U32* dst_pixels = (U32*) dst;
@@ -788,7 +788,7 @@ BOOL LLImageTGA::decodeTruecolorRle32( LLImageRaw* raw_image, BOOL &alpha_opaque
 		// Read RLE block header
 		
 		if (src >= last_src)
-			return FALSE;
+			return false;
 
 		U8 block_header_byte = *src;
 		src++;
@@ -799,7 +799,7 @@ BOOL LLImageTGA::decodeTruecolorRle32( LLImageRaw* raw_image, BOOL &alpha_opaque
 			// Encoded (duplicate-pixel) block
 
 			if (src + 3 >= last_src)
-				return FALSE;
+				return false;
 			
 			rgba_byte_p[0] = src[2];
 			rgba_byte_p[1] = src[1];
@@ -807,7 +807,7 @@ BOOL LLImageTGA::decodeTruecolorRle32( LLImageRaw* raw_image, BOOL &alpha_opaque
 			rgba_byte_p[3] = src[3];
 			if (rgba_byte_p[3] != 255)
 			{
-				alpha_opaque = FALSE;
+				alpha_opaque = false;
 			}
 
 			src += 4;
@@ -826,7 +826,7 @@ BOOL LLImageTGA::decodeTruecolorRle32( LLImageRaw* raw_image, BOOL &alpha_opaque
 			do
 			{
 				if (src + 3 >= last_src)
-					return FALSE;
+					return false;
 				
 				((U8*)dst_pixels)[0] = src[2];
 				((U8*)dst_pixels)[1] = src[1];
@@ -834,7 +834,7 @@ BOOL LLImageTGA::decodeTruecolorRle32( LLImageRaw* raw_image, BOOL &alpha_opaque
 				((U8*)dst_pixels)[3] = src[3];
 				if (src[3] != 255)
 				{
-					alpha_opaque = FALSE;
+					alpha_opaque = false;
 				}
 				src += 4;
 				dst_pixels++;
@@ -844,10 +844,10 @@ BOOL LLImageTGA::decodeTruecolorRle32( LLImageRaw* raw_image, BOOL &alpha_opaque
 		}
 	}
 
-	return TRUE; 
+	return true; 
 }
 
-BOOL LLImageTGA::decodeTruecolorRle15( LLImageRaw* raw_image )
+bool LLImageTGA::decodeTruecolorRle15( LLImageRaw* raw_image )
 {
 	llassert( getComponents() == 3 );
 	llassert( mIs15Bit );
@@ -863,7 +863,7 @@ BOOL LLImageTGA::decodeTruecolorRle15( LLImageRaw* raw_image )
 		// Read RLE block header
 
 		if (src >= last_src)
-			return FALSE;
+			return false;
 
 		U8 block_header_byte = *src;
 		src++;
@@ -875,7 +875,7 @@ BOOL LLImageTGA::decodeTruecolorRle15( LLImageRaw* raw_image )
 			do
 			{
 				if (src + 2 >= last_src)
-					return FALSE;
+					return false;
 				
 				decodeTruecolorPixel15( dst, src );   // slow
 				dst += 3;
@@ -890,7 +890,7 @@ BOOL LLImageTGA::decodeTruecolorRle15( LLImageRaw* raw_image )
 			do
 			{
 				if (src + 2 >= last_src)
-					return FALSE;
+					return false;
 
 				decodeTruecolorPixel15( dst, src );
 				dst += 3;
@@ -901,12 +901,12 @@ BOOL LLImageTGA::decodeTruecolorRle15( LLImageRaw* raw_image )
 		}
 	}
 
-	return TRUE;
+	return true;
 }
 
 
 
-BOOL LLImageTGA::decodeTruecolorRle24( LLImageRaw* raw_image )
+bool LLImageTGA::decodeTruecolorRle24( LLImageRaw* raw_image )
 {
 	llassert( getComponents() == 3 );
 
@@ -921,7 +921,7 @@ BOOL LLImageTGA::decodeTruecolorRle24( LLImageRaw* raw_image )
 		// Read RLE block header
 
 		if (src >= last_src)
-			return FALSE;
+			return false;
 	
 		U8 block_header_byte = *src;
 		src++;
@@ -933,7 +933,7 @@ BOOL LLImageTGA::decodeTruecolorRle24( LLImageRaw* raw_image )
 			do
 			{
 				if (src + 2 >= last_src)
-					return FALSE;
+					return false;
 				dst[0] = src[2];
 				dst[1] = src[1];
 				dst[2] = src[0];
@@ -949,7 +949,7 @@ BOOL LLImageTGA::decodeTruecolorRle24( LLImageRaw* raw_image )
 			do
 			{
 				if (src + 2 >= last_src)
-					return FALSE;
+					return false;
 				
 				dst[0] = src[2];
 				dst[1] = src[1];
@@ -962,11 +962,11 @@ BOOL LLImageTGA::decodeTruecolorRle24( LLImageRaw* raw_image )
 		}
 	}
 
-	return TRUE;
+	return true;
 }
 
 
-BOOL LLImageTGA::decodeTruecolorRle8( LLImageRaw* raw_image )
+bool LLImageTGA::decodeTruecolorRle8( LLImageRaw* raw_image )
 {
 	llassert( getComponents() == 1 );
 
@@ -981,7 +981,7 @@ BOOL LLImageTGA::decodeTruecolorRle8( LLImageRaw* raw_image )
 		// Read RLE block header
 
 		if (src >= last_src)
-			return FALSE;
+			return false;
 
 		U8 block_header_byte = *src;
 		src++;
@@ -990,7 +990,7 @@ BOOL LLImageTGA::decodeTruecolorRle8( LLImageRaw* raw_image )
 		if( block_header_byte & 0x80 )
 		{
 			if (src >= last_src)
-				return FALSE;
+				return false;
 			
 			// Encoded (duplicate-pixel) block
 			memset( dst, *src, block_pixel_count );
@@ -1003,7 +1003,7 @@ BOOL LLImageTGA::decodeTruecolorRle8( LLImageRaw* raw_image )
 			do
 			{
 				if (src >= last_src)
-					return FALSE;
+					return false;
 				
 				*dst = *src;
 				dst++;
@@ -1014,13 +1014,13 @@ BOOL LLImageTGA::decodeTruecolorRle8( LLImageRaw* raw_image )
 		}
 	}
 
-	return TRUE;
+	return true;
 }
 
 
 // Decoded and process the image for use in avatar gradient masks.
 // Processing happens during the decode for speed.
-BOOL LLImageTGA::decodeAndProcess( LLImageRaw* raw_image, F32 domain, F32 weight )
+bool LLImageTGA::decodeAndProcess( LLImageRaw* raw_image, F32 domain, F32 weight )
 {
 	llassert_always(raw_image);
 	
@@ -1043,14 +1043,14 @@ BOOL LLImageTGA::decodeAndProcess( LLImageRaw* raw_image, F32 domain, F32 weight
 	if (!getData() || (0 == getDataSize()))
 	{
 		setLastError("LLImageTGA trying to decode an image with no data!");
-		return FALSE;
+		return false;
 	}
 
 	// Only works for unflipped monochrome RLE images
 	if( (getComponents() != 1) || (mImageType != 11) || mOriginTopBit || mOriginRightBit ) 
 	{
 		LL_ERRS() << "LLImageTGA trying to alpha-gradient process an image that's not a standard RLE, one component image" << LL_ENDL;
-		return FALSE;
+		return false;
 	}
 
 	raw_image->resize(getWidth(), getHeight(), getComponents());
@@ -1136,7 +1136,7 @@ BOOL LLImageTGA::decodeAndProcess( LLImageRaw* raw_image, F32 domain, F32 weight
 			}
 		}
 	}
-	return TRUE;
+	return true;
 }
 
 // Reads a .tga file and creates an LLImageTGA with its data.
diff --git a/indra/llimage/llimagetga.h b/indra/llimage/llimagetga.h
index 5da3525149..b1f34dcdad 100644
--- a/indra/llimage/llimagetga.h
+++ b/indra/llimage/llimagetga.h
@@ -41,25 +41,25 @@ public:
 	LLImageTGA(const std::string& file_name);
 
 	/*virtual*/ std::string getExtension() { return std::string("tga"); }
-	/*virtual*/ BOOL updateData();
-	/*virtual*/ BOOL decode(LLImageRaw* raw_image, F32 decode_time=0.0);
-	/*virtual*/ BOOL encode(const LLImageRaw* raw_image, F32 encode_time=0.0);
+	/*virtual*/ bool updateData();
+	/*virtual*/ bool decode(LLImageRaw* raw_image, F32 decode_time=0.0);
+	/*virtual*/ bool encode(const LLImageRaw* raw_image, F32 encode_time=0.0);
 
-	BOOL			 decodeAndProcess(LLImageRaw* raw_image, F32 domain, F32 weight);
+	bool			 decodeAndProcess(LLImageRaw* raw_image, F32 domain, F32 weight);
 	
 private:
-	BOOL			 decodeTruecolor( LLImageRaw* raw_image, BOOL rle, BOOL flipped );
+	bool			 decodeTruecolor( LLImageRaw* raw_image, bool rle, bool flipped );
 
-	BOOL			 decodeTruecolorRle8( LLImageRaw* raw_image );
-	BOOL			 decodeTruecolorRle15( LLImageRaw* raw_image );
-	BOOL			 decodeTruecolorRle24( LLImageRaw* raw_image );
-	BOOL			 decodeTruecolorRle32( LLImageRaw* raw_image, BOOL &alpha_opaque );
+	bool			 decodeTruecolorRle8( LLImageRaw* raw_image );
+	bool			 decodeTruecolorRle15( LLImageRaw* raw_image );
+	bool			 decodeTruecolorRle24( LLImageRaw* raw_image );
+	bool			 decodeTruecolorRle32( LLImageRaw* raw_image, bool &alpha_opaque );
 
 	void			 decodeTruecolorPixel15( U8* dst, const U8* src );
 
-	BOOL			 decodeTruecolorNonRle( LLImageRaw* raw_image, BOOL &alpha_opaque );
+	bool			 decodeTruecolorNonRle( LLImageRaw* raw_image, bool &alpha_opaque );
 	
-	BOOL			 decodeColorMap( LLImageRaw* raw_image, BOOL rle, BOOL flipped );
+	bool			 decodeColorMap( LLImageRaw* raw_image, bool rle, bool flipped );
 
 	void			 decodeColorMapPixel8(U8* dst, const U8* src);
 	void			 decodeColorMapPixel15(U8* dst, const U8* src);
@@ -100,7 +100,7 @@ private:
 	S32		mColorMapLength; 
 	S32		mColorMapBytesPerEntry;
 
-	BOOL	mIs15Bit;
+	bool	mIs15Bit;
 
 	static const U8 s5to8bits[32];
 };