+Unity Runtime codeHEADmaster

1 files changed, 621 insertions, 0 deletions

diff --git a/Runtime/Graphics/ImageConversion.cpp b/Runtime/Graphics/ImageConversion.cpp
new file mode 100644
index 0000000..fe0b462
--- /dev/null
+++ b/Runtime/Graphics/ImageConversion.cpp
@@ -0,0 +1,621 @@
+#include "UnityPrefix.h"
+#include "ImageConversion.h"
+#include "Runtime/Utilities/File.h"
+#include "Texture2D.h"
+#include "Image.h"
+#include "Runtime/Utilities/BitUtility.h"
+#include "Runtime/Math/Color.h"
+#include "DXTCompression.h"
+#if ENABLE_PNG_JPG
+#include "External/ProphecySDK/src/extlib/pnglib/png.h"
+#include "External/ProphecySDK/src/extlib/jpglib/jpeglib.h"
+#include "Runtime/Export/JPEGMemsrc.h"
+#endif
+#include "Runtime/Shaders/GraphicsCaps.h"
+#include "Runtime/GfxDevice/GfxDeviceConfigure.h"
+#include <setjmp.h>
+#include "Runtime/Network/PlayerCommunicator/PlayerConnection.h"
+
+using namespace std;
+
+// --------------------------------------------------------------------------
+//  PNG
+
+#if ENABLE_PNG_JPG
+static void PngWriteToMemoryFunc( png_structp png, png_bytep data, png_size_t size )
+{
+	MemoryBuffer* buffer = (MemoryBuffer*)png->io_ptr;
+	buffer->insert( buffer->end(), data, data+size );
+}
+static void PngWriteFlushFunc( png_structp png )
+{
+}
+
+
+bool ConvertImageToPNGBuffer( const ImageReference& inputImage, MemoryBuffer& buffer )
+{
+	png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,(png_voidp)NULL, NULL, NULL);
+	if (!png_ptr)
+		return false;
+	png_infop info_ptr = png_create_info_struct(png_ptr);
+	if (!info_ptr)
+		return false;
+
+	if (setjmp(png_jmpbuf(png_ptr)))
+		return false;
+
+	buffer.reserve( 4096 );
+	png_set_write_fn( png_ptr, &buffer, PngWriteToMemoryFunc, PngWriteFlushFunc );
+
+	png_set_compression_level(png_ptr, Z_BEST_SPEED);
+
+	int format = kTexFormatRGBA32;
+	if (inputImage.GetFormat() == kTexFormatRGB24 || inputImage.GetFormat() == kTexFormatRGB565)
+		format = kTexFormatRGB24;
+
+	Image image( inputImage.GetWidth(), inputImage.GetHeight(), format );
+	image.BlitImage( inputImage );
+
+	png_set_IHDR(png_ptr, info_ptr,
+		inputImage.GetWidth(),
+		inputImage.GetHeight(),
+		8,
+		format == kTexFormatRGB24 ? PNG_COLOR_TYPE_RGB : PNG_COLOR_TYPE_RGB_ALPHA,
+		PNG_INTERLACE_NONE,
+		PNG_COMPRESSION_TYPE_DEFAULT,
+		PNG_FILTER_TYPE_DEFAULT);
+
+	png_write_info(png_ptr, info_ptr);
+	for (int i = 0; i < image.GetHeight(); i++)
+		png_write_row(png_ptr, image.GetRowPtr(image.GetHeight() - i - 1));
+
+	png_write_end(png_ptr, info_ptr);
+
+	png_destroy_write_struct(&png_ptr, &info_ptr);
+
+	return !buffer.empty();
+}
+
+
+#if CAPTURE_SCREENSHOT_AVAILABLE
+
+bool ConvertImageToPNGFile (const ImageReference& inputImage, const string& path)
+{
+	MemoryBuffer buffer;
+	if( !ConvertImageToPNGBuffer( inputImage, buffer ) )
+		return false;
+
+	#if UNITY_PEPPER
+	// no file access in pepper. write screenshot to stdout.
+	// we need to write hex, as string reading in mono may perform
+	// string encoding translation on stdout, breaking the binary data.
+	printf_console("SCREENSHOT_MARKER=%sSCREENSHOTSTART_MARKER", path.c_str());
+	for (int i=0; i<buffer.size(); i++)
+		printf_console("%02x", buffer[i]);
+	printf_console("SCREENSHOTEND_MARKER\n");
+	return true;
+	#else
+#if ENABLE_PLAYERCONNECTION
+	TransferFileOverPlayerConnection(path, &buffer[0], buffer.size());
+#endif
+	return WriteBytesToFile (&buffer[0], buffer.size(), path);
+	#endif
+}
+
+#endif
+
+struct PngMemoryReadContext {
+	const unsigned char* inputPointer;
+	size_t inputSizeLeft;
+};
+
+static void PngReadFromMemoryFunc( png_structp png_ptr, png_bytep data, png_size_t len )
+{
+	PngMemoryReadContext* context = (PngMemoryReadContext*)png_ptr->io_ptr;
+	// check for overflow
+	if( len > context->inputSizeLeft )
+		len = context->inputSizeLeft;
+
+	memcpy( data, context->inputPointer, len );
+	context->inputPointer += len;
+	context->inputSizeLeft -= len;
+}
+
+
+static void PngReadWarningFunc( png_struct* png_ptr, png_const_charp warning_msg )
+{
+}
+
+bool ImageSizeBoundCheck(unsigned int width, unsigned int height) {
+	int tmp, tmp2;
+	if (width + 3 < width ||
+		height + 3 < height) {
+		return 0;
+	}
+
+	tmp = width * height;
+	if (width != 0 && height != tmp / width) {
+		return 0;
+	}
+
+	tmp2 = tmp * 16;
+	if (tmp != tmp2/16) {
+		return 0;
+	}
+	return 1;
+}
+
+static bool LoadPngIntoTexture( Texture2D& texture, const void* data, size_t size, bool compressTexture, UInt8** outRGBABaseLevelForDXTMips )
+{
+	PngMemoryReadContext context;
+	context.inputPointer = static_cast<const unsigned char*>( data );
+	context.inputSizeLeft = size;
+
+	if( !data )
+		return false;
+
+	// check png header
+	if( size < 8 || !png_check_sig( const_cast<unsigned char*>(context.inputPointer), 8 ) )
+		return false;
+
+	png_structp png_ptr;
+	png_infop info_ptr;
+	png_uint_32 width, height;
+	int bit_depth, color_type, interlace_type;
+
+	double image_gamma = 0.45;
+	int number_passes = 0;
+
+	png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,NULL,NULL,&PngReadWarningFunc);
+	if( png_ptr == NULL )
+		return false;
+
+	info_ptr = png_create_info_struct(png_ptr);
+	if( info_ptr == NULL )
+	{
+		png_destroy_read_struct(&png_ptr,(png_infopp)NULL,(png_infopp)NULL);
+		return false;
+	}
+
+	if( setjmp(png_ptr->jmpbuf) )
+	{
+		png_destroy_read_struct(&png_ptr,&info_ptr,(png_infopp)NULL);
+		return false;
+	}
+
+	png_set_read_fn( png_ptr, &context, &PngReadFromMemoryFunc );
+	png_read_info( png_ptr, info_ptr );
+
+	png_get_IHDR( png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, &interlace_type, NULL, NULL );
+
+	png_set_strip_16(png_ptr); // strip 16 bit channels to 8 bit
+	png_set_packing(png_ptr);  // separate palettized channels
+
+	// palette -> rgb
+	if( color_type == PNG_COLOR_TYPE_PALETTE )
+	{
+		png_set_expand(png_ptr);
+	}
+
+	// grayscale -> 8 bits
+	if( !(color_type & PNG_COLOR_MASK_COLOR) && bit_depth < 8 ) png_set_expand(png_ptr);
+
+	// if exists, expand tRNS to alpha channel
+	if( png_get_valid(png_ptr,info_ptr,PNG_INFO_tRNS) ) png_set_expand(png_ptr);
+
+	// expand gray to RGB
+	if( color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_GRAY_ALPHA )
+		png_set_gray_to_rgb(png_ptr);
+
+	// we need to get ARGB format for raw textures, and RGBA if we will compress it
+	if( !compressTexture )
+		png_set_swap_alpha(png_ptr);
+
+	png_set_filler( png_ptr, 0xFF, PNG_FILLER_BEFORE ); // force alpha byte
+
+	// Only apply gamma correction if the image has gamma information. In this case
+	// assume our display gamma is 2.0 (a compromise between Mac and PC...).
+	double screen_gamma = 2.0f;
+	image_gamma = 0.0;
+	if ( png_get_gAMA(png_ptr,info_ptr,&image_gamma) )
+	{
+		png_set_gamma(png_ptr,screen_gamma,image_gamma);
+	}
+
+	number_passes = png_set_interlace_handling(png_ptr);
+	png_read_update_info(png_ptr,info_ptr); // update gamma, etc.
+
+	// If texture size or format differs, reformat the texture.
+	TextureFormat wantedFormat = compressTexture ? kTexFormatDXT5 : kTexFormatARGB32;
+	bool mipMaps = texture.HasMipMap();
+	if( width != texture.GetDataWidth () || height != texture.GetDataHeight () || kTexFormatARGB32 != texture.GetTextureFormat())
+		texture.InitTexture( width, height, wantedFormat, mipMaps ? Texture2D::kMipmapMask : Texture2D::kNoMipmap, 1 );
+
+	ImageReference ref;
+	AssertIf( !outRGBABaseLevelForDXTMips );
+	if( compressTexture ) {
+		int imageByteSize;
+		if (mipMaps) {
+			int miplevel = CalculateMipMapCount3D(width, height, 1);
+			int iter;
+			unsigned int completeSize = 0;
+			unsigned int prevcompleteSize = 0;
+
+			if (!ImageSizeBoundCheck(width, height)) {
+				longjmp(png_ptr->jmpbuf, 1);
+			}
+
+			for (iter = 0; iter < miplevel; iter++) {
+				prevcompleteSize = completeSize;
+				completeSize += CalculateImageSize (std::max (width >> iter, (png_uint_32)1), std::max (height >> iter, (png_uint_32)1), kTexFormatRGBA32);
+				if (completeSize < prevcompleteSize) {
+					longjmp(png_ptr->jmpbuf, 1);
+				}
+			}
+			imageByteSize = CalculateImageMipMapSize( width, height, kTexFormatRGBA32 );
+		} else {
+			if (!ImageSizeBoundCheck(width, height)) {
+				longjmp(png_ptr->jmpbuf, 1);
+			}
+			imageByteSize = CalculateImageSize( width, height, kTexFormatRGBA32 );
+		}
+
+		*outRGBABaseLevelForDXTMips = new UInt8[imageByteSize];
+		ref = ImageReference( width, height, width*4, kTexFormatRGBA32, *outRGBABaseLevelForDXTMips );
+	} else {
+		if( !texture.GetWriteImageReference(&ref, 0, 0) ) {
+			png_destroy_read_struct( &png_ptr,&info_ptr,(png_infopp)NULL );
+			return false;
+		}
+	}
+
+	size_t len = sizeof(png_bytep) * height;
+
+	/* boundcheck for integer overflow */
+	if (height != len / sizeof(png_bytep) ) {
+		png_destroy_read_struct( &png_ptr,&info_ptr,(png_infopp)NULL );
+		return false;
+	}
+
+	png_bytep* row_pointers = new png_bytep[height];
+	for( png_uint_32 row = 0; row<height; ++row )
+	{
+		row_pointers[row] = ref.GetRowPtr(height-1-row);
+	}
+
+	for( int pass = 0; pass < number_passes; pass++ )
+	{
+		png_read_rows( png_ptr,row_pointers,NULL,height );
+	}
+
+	// cleanup
+	png_read_end( png_ptr,info_ptr );
+	png_destroy_read_struct( &png_ptr,&info_ptr,(png_infopp)NULL );
+	delete[] row_pointers;
+
+	return true;
+}
+
+// --------------------------------------------------------------------------
+//  JPG
+
+/* Custom error manager. As the default one in libjpeg crashes Unity on error */
+struct unity_jpeg_error_mgr {
+	struct jpeg_error_mgr pub;    /* "public" fields */
+	jmp_buf setjmp_buffer;        /* for return to caller */
+};
+typedef struct unity_jpeg_error_mgr * unity_jpeg_error_ptr;
+
+/*
+ * Here's the routine that will replace the standard error_exit method:
+ */
+METHODDEF(void)
+unity_jpeg_error_exit (j_common_ptr cinfo)
+{
+	/* cinfo->err really points to a unity_jpeg_error_mgr struct, so coerce pointer */
+	unity_jpeg_error_ptr myerr = (unity_jpeg_error_ptr) cinfo->err;
+	/* Always display the message. */
+	/* We could postpone this until after returning, if we chose. */
+	(*cinfo->err->output_message) (cinfo);
+	/* Return control to the setjmp point */
+	longjmp(myerr->setjmp_buffer, 1);
+}
+
+static void HandleError (struct jpeg_decompress_struct& cinfo, Texture2D* tex)
+{
+	jpeg_destroy_decompress (&cinfo);
+}
+
+static int LoadJpegIntoTexture(Texture2D& tex, const UInt8* jpegData, size_t jpegDataSz, bool compressTexture, UInt8** outRGBABaseLevelForDXTMips)
+{
+#if UNITY_WII
+	AssertIf ("ERROR: LoadJpegIntoTexture is not supported!");
+	return 0;
+#else
+	struct jpeg_decompress_struct cinfo;
+
+	/* We use our private extension JPEG error handler.
+	* Note that this struct must live as long as the main JPEG parameter
+	* struct, to avoid dangling-pointer problems.
+	*/
+	struct unity_jpeg_error_mgr jerr;
+
+    JSAMPARRAY in;
+    int row_stride;
+    unsigned char *out;
+
+    // set up the decompression.
+    cinfo.err = jpeg_std_error(&jerr.pub);
+    jerr.pub.error_exit = unity_jpeg_error_exit;
+
+	/* Establish the setjmp return context for my_error_exit to use. */
+	if (setjmp(jerr.setjmp_buffer)) {
+    	/* If we get here, the JPEG code has signaled an error.
+		* We need to clean up the JPEG object, close the input file, and return.
+		*/
+		HandleError(cinfo, &tex);
+		return 0;
+	}
+
+	jpeg_create_decompress (&cinfo);
+
+    // inititalize the source
+	jpeg_memory_src (&cinfo, (unsigned char*)jpegData, jpegDataSz);
+
+    // initialize decompression
+	(void) jpeg_read_header (&cinfo, TRUE);
+	(void) jpeg_start_decompress (&cinfo);
+
+    // set up the width and height for return
+	int width = cinfo.image_width;
+	int height = cinfo.image_height;
+
+    // initialize the input buffer - we'll use the in-built memory management routines in the
+    // JPEG library because it will automatically free the used memory for us when we destroy
+    // the decompression structure. cool.
+    row_stride = cinfo.output_width * cinfo.output_components;
+	if (cinfo.output_width != 0 && cinfo.output_components != row_stride / cinfo.output_width) {
+		HandleError(cinfo, &tex);
+		return 0;
+	}
+    in = (*cinfo.mem->alloc_sarray) ((j_common_ptr) &cinfo, JPOOL_IMAGE, row_stride, 1);
+
+    // we only support three channel RGB or one channel grayscale formats
+
+    if (cinfo.output_components != 3 && cinfo.output_components != 1)
+	{
+		HandleError(cinfo, &tex);
+		return 0;
+    }
+
+	// If texture size or format differs, reformat the texture.
+	TextureFormat wantedFormat = compressTexture ? kTexFormatDXT1 : kTexFormatRGB24;
+	bool mipMaps = tex.HasMipMap();
+    if (width != tex.GetDataWidth () || height != tex.GetDataHeight () || wantedFormat != tex.GetTextureFormat())
+		tex.InitTexture (width, height, wantedFormat, mipMaps ? Texture2D::kMipmapMask : Texture2D::kNoMipmap, 1);
+
+	ImageReference ref;
+	AssertIf( !outRGBABaseLevelForDXTMips );
+	if( compressTexture ) {
+		int imageByteSize;
+		if (mipMaps) {
+			int miplevel = CalculateMipMapCount3D(width, height, 1);
+			int iter;
+			unsigned int completeSize = 0;
+			unsigned int prevcompleteSize = 0;
+
+			if (!ImageSizeBoundCheck(width, height)) {
+				HandleError(cinfo, &tex);
+				return 0;
+			}
+
+			for (iter = 0; iter < miplevel; iter++) {
+				prevcompleteSize = completeSize;
+				completeSize += CalculateImageSize (std::max (width >> iter, 1), std::max (height >> iter, 1), kTexFormatRGBA32);
+				if (completeSize < prevcompleteSize) {
+					HandleError(cinfo, &tex);
+					return 0;
+				}
+			}
+			imageByteSize = CalculateImageMipMapSize( width, height, kTexFormatRGBA32 );
+		} else {
+			if (!ImageSizeBoundCheck(width, height)) {
+				HandleError(cinfo, &tex);
+				return 0;
+			}
+			imageByteSize = CalculateImageSize( width, height, kTexFormatRGBA32 );
+		}
+		*outRGBABaseLevelForDXTMips = new UInt8[imageByteSize];
+		ref = ImageReference( width, height, width*4, kTexFormatRGBA32, *outRGBABaseLevelForDXTMips );
+	} else {
+		if( !tex.GetWriteImageReference(&ref, 0, 0) ) {
+			jpeg_destroy_decompress (&cinfo);
+			return 0;
+		}
+	}
+
+	UInt8* dst;
+	int scanline = height-1;
+	int result = 1;
+
+	if (scanline < 0) {
+		HandleError(cinfo, &tex);
+		return 0;
+	}
+
+	// three channel output
+	if( cinfo.output_components == 3 )
+	{
+		while (cinfo.output_scanline < cinfo.output_height)
+		{
+			jpeg_read_scanlines(&cinfo, in, 1);
+			dst = ref.GetRowPtr(scanline);
+			out = in[0];
+			if( !compressTexture ) {
+				for( int i = 0; i < row_stride; i += 3, dst += 3 )
+				{
+					dst[0] = out[i+2];
+					dst[1] = out[i+1];
+					dst[2] = out[i];
+				}
+			} else {
+				for( int i = 0; i < row_stride; i += 3, dst += 4 )
+				{
+					dst[0] = out[i+2];
+					dst[1] = out[i+1];
+					dst[2] = out[i];
+					dst[3] = 255;
+				}
+			}
+			--scanline;
+		}
+	}
+	// one channel output
+	else if( cinfo.output_components == 1 )
+	{
+		while (cinfo.output_scanline < cinfo.output_height)
+		{
+			jpeg_read_scanlines(&cinfo, in, 1);
+			dst = ref.GetRowPtr(scanline);
+			out = in[0];
+			if( !compressTexture ) {
+				for( int i = 0; i < row_stride; ++i, dst += 3 )
+				{
+					UInt8 v = out[i];
+					dst[0] = v;
+					dst[1] = v;
+					dst[2] = v;
+				}
+			} else {
+				for( int i = 0; i < row_stride; ++i, dst += 4 )
+				{
+					UInt8 v = out[i];
+					dst[0] = v;
+					dst[1] = v;
+					dst[2] = v;
+					dst[4] = 255;
+				}
+			}
+			--scanline;
+		}
+	}
+	else
+	{
+		AssertString("unsupported number of output components in JPEG");
+		result = 0;
+	}
+
+	// finish decompression and destroy the jpeg
+	(void) jpeg_finish_decompress (&cinfo);
+	jpeg_destroy_decompress (&cinfo);
+
+
+	return result;
+#endif
+}
+
+#endif
+
+// --------------------------------------------------------------------------
+//  Generic byte->texture loading
+
+
+// Simple image to load into the texture on error: "?"
+static const char* kDummyErrorImage =
+"\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\x00\x00\xff\x00\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+"\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\x00\x00\xff\x00\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+"\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+"\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\x00\x00\xff\x00\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff"
+"\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\x00\x00\xff\x00\x00\xff\xff\xff\xff\xff\xff"
+"\xff\xff\xff\xff\x00\x00\xff\x00\x00\xff\xff\xff\xff\xff\xff\xff\x00\x00\xff\x00\x00\xff\xff\xff"
+"\xff\xff\xff\xff\x00\x00\xff\x00\x00\xff\xff\xff\xff\xff\xff\xff\x00\x00\xff\x00\x00\xff\xff\xff"
+"\xff\xff\xff\xff\xff\xff\xff\x00\x00\xff\x00\x00\xff\x00\x00\xff\x00\x00\xff\xff\xff\xff\xff\xff";
+
+#if UNITY_FLASH
+//Leaky temporary workaround to deal with not having setjmp/longjmp on Flash. This is only to be able to return correctly, but doesn't clean up anything...beware!
+
+__attribute__ ((noinline)) static int LoadJpegIntoTextureFlash(Texture2D& tex, const UInt8* jpegData, size_t jpegDataSz, bool compressTexture, UInt8** outRGBABaseLevelForDXTMips)
+{
+	__asm __volatile__("try{");
+	int val = LoadJpegIntoTexture(tex,jpegData,jpegDataSz,compressTexture,outRGBABaseLevelForDXTMips);
+	__asm __volatile__("}catch(e:Error){r_g0 = 0; return;}");
+	return val;
+}
+
+__attribute__ ((noinline)) static bool LoadPngIntoTextureFlash( Texture2D& texture, const void* data, size_t size, bool compressTexture, UInt8** outRGBABaseLevelForDXTMips )
+{
+	__asm __volatile__("try{");
+	bool val = LoadPngIntoTexture(texture,data,size,compressTexture,outRGBABaseLevelForDXTMips);
+	__asm __volatile__("}catch(e:Error){r_g0 = 0; return;}");
+	return val;
+}
+
+#define LoadJpegIntoTexture LoadJpegIntoTextureFlash
+#define LoadPngIntoTexture LoadPngIntoTextureFlash
+#endif
+
+bool LoadMemoryBufferIntoTexture( Texture2D& tex, const UInt8* data, size_t size, LoadImageCompression compression, bool markNonReadable )
+{
+	UInt8* rgbaBaseLevel = NULL;
+	if( !gGraphicsCaps.hasS3TCCompression )
+		compression = kLoadImageUncompressed;
+
+#if ENABLE_PNG_JPG
+	if( !LoadJpegIntoTexture( tex, data, size, compression!=kLoadImageUncompressed, &rgbaBaseLevel ) )
+	{
+		delete[] rgbaBaseLevel; rgbaBaseLevel = NULL;
+		if( !LoadPngIntoTexture( tex, data, size, compression!=kLoadImageUncompressed, &rgbaBaseLevel ) )
+		{
+			// Store a dummy image into the texture
+			tex.InitTexture( 8, 8, kTexFormatRGB24, Texture2D::kNoMipmap, 1 );
+			unsigned char* textureData = (unsigned char*)tex.GetRawImageData();
+			memcpy( textureData, kDummyErrorImage, 8*8*3 );
+		}
+	}
+#endif
+	// Compress the image if needed
+	bool isDXTCompressed = IsCompressedDXTTextureFormat(tex.GetTextureFormat());
+	if( isDXTCompressed ) {
+		#if !GFX_SUPPORTS_DXT_COMPRESSION
+		delete[] rgbaBaseLevel;
+		return false;
+		#else
+
+		AssertIf( !rgbaBaseLevel );
+		// do final image compression
+		int width = tex.GetDataWidth();
+		int height = tex.GetDataHeight();
+		TextureFormat texFormat = tex.GetTextureFormat();
+		AssertIf( texFormat != kTexFormatDXT1 && texFormat != kTexFormatDXT5 );
+		FastCompressImage( width, height, rgbaBaseLevel, tex.GetRawImageData(), texFormat == kTexFormatDXT5, compression==kLoadImageDXTCompressDithered );
+
+		bool mipMaps = tex.HasMipMap();
+		if( mipMaps ) {
+			// compute mip representations from the base level
+			CreateMipMap (rgbaBaseLevel, width, height, 1, kTexFormatRGBA32);
+			// DXT compress them
+			int mipCount = tex.CountDataMipmaps();
+			for( int mip = 1; mip < mipCount; ++mip )
+			{
+				const UInt8* srcMipData = rgbaBaseLevel + CalculateMipMapOffset(width, height, kTexFormatRGBA32, mip);
+				UInt8* dstMipData = tex.GetRawImageData() + CalculateMipMapOffset(width, height, texFormat, mip);
+				FastCompressImage( std::max(width>>mip,1), std::max(height>>mip,1), srcMipData, dstMipData, texFormat == kTexFormatDXT5, compression==kLoadImageDXTCompressDithered );
+			}
+		}
+		#endif // GFX_SUPPORTS_DXT_COMPRESSION
+	}
+	delete[] rgbaBaseLevel;
+
+	if(markNonReadable)
+	{
+		tex.SetIsReadable(false);
+		tex.SetIsUnreloadable(true);
+	}
+
+	if( !IsCompressedDXTTextureFormat(tex.GetTextureFormat()) )
+		tex.UpdateImageData();
+	else
+		tex.UpdateImageDataDontTouchMipmap();
+
+	return true;
+}