// I let Quicktime handle image import since it supports most popular
// image formats such as:
// *.psd, *.bmp, *.tif, *.png, *.jpg, *.gif, *.pct, *.pcx
//------------------------------------------------------------------------
bool pixel_map::load_from_qt(const char *filename)
{
FSSpec fss;
OSErr err;
// get file specification to application directory
err = HGetVol(nil, &fss.vRefNum, &fss.parID);
if (err == noErr)
{
CopyCStringToPascal(filename, fss.name);
GraphicsImportComponent gi;
err = GetGraphicsImporterForFile (&fss, &gi);
if (err == noErr)
{
ImageDescriptionHandle desc;
GraphicsImportGetImageDescription(gi, &desc);
// For simplicity, all images are currently converted to 32 bit.
// create an empty pixelmap
short depth = 32;
create ((**desc).width, (**desc).height, (org_e)depth, 0xff);
DisposeHandle ((Handle)desc);
// let Quicktime draw to pixelmap
GraphicsImportSetGWorld(gi, m_pmap, nil);
GraphicsImportDraw(gi);
// Well, this is a hack. The graphics importer sets the alpha channel of the pixelmap to 0x00
// for imported images without alpha channel but this would cause agg to draw an invisible image.
// set alpha channel to 0xff
unsigned char * buf = m_buf;
for (unsigned int size = 0; size < m_img_size; size += 4)
{
*buf = 0xff;
buf += 4;
}
}
}
return err == noErr;
}
osg::Image* QuicktimeImportExport::doImport(unsigned char* data, unsigned int sizeData, const std::string& fileTypeHint)
{
GWorldPtr gworld = 0;
OSType pixelFormat;
int rowStride;
GraphicsImportComponent gicomp = 0;
Rect rectImage;
GDHandle origDevice = 0;
CGrafPtr origPort = 0;
ImageDescriptionHandle desc = 0;
int depth = 32;
unsigned int xsize, ysize;
unsigned char* imageData = 0;
// Data Handle for file data ( & load data from file )
Handle dataRef = getPtrDataRef(data, sizeData, fileTypeHint);
try {
OSErr err = noErr;
// GraphicsImporter - Get Importer for our filetype
GetGraphicsImporterForDataRef(dataRef, 'ptr ', &gicomp);
// GWorld - Get Texture Info
err = GraphicsImportGetNaturalBounds(gicomp, &rectImage);
if (err != noErr) {
throw QTImportExportException(err, "GraphicsImportGetNaturalBounds failed");
}
xsize = (unsigned int)(rectImage.right - rectImage.left);
ysize = (unsigned int)(rectImage.bottom - rectImage.top);
// ImageDescription - Get Image Description
err = GraphicsImportGetImageDescription(gicomp, &desc);
if (err != noErr) {
throw QTImportExportException(err, "GraphicsImportGetImageDescription failed");
}
// ImageDescription - Get Bit Depth
HLock(reinterpret_cast<char **>(desc));
// GWorld - Pixel Format stuff
pixelFormat = k32ARGBPixelFormat; // Make sure its forced...NOTE: i'm pretty sure this cannot be RGBA!
// GWorld - Row stride
rowStride = xsize * 4; // (width * depth_bpp / 8)
// GWorld - Allocate output buffer
imageData = new unsigned char[rowStride * ysize];
// GWorld - Actually Create IT!
QTNewGWorldFromPtr(&gworld, pixelFormat, &rectImage, 0, 0, 0, imageData, rowStride);
if (!gworld) {
throw QTImportExportException(-1, "QTNewGWorldFromPtr failed");
}
// Save old Graphics Device and Graphics Port to reset to later
GetGWorld (&origPort, &origDevice);
// GraphicsImporter - Set Destination GWorld (our buffer)
err = GraphicsImportSetGWorld(gicomp, gworld, 0);
if (err != noErr) {
throw QTImportExportException(err, "GraphicsImportSetGWorld failed");
}
// GraphicsImporter - Set Quality Level
err = GraphicsImportSetQuality(gicomp, codecLosslessQuality);
if (err != noErr) {
throw QTImportExportException(err, "GraphicsImportSetQuality failed");
}
// Lock pixels so that we can draw to our memory texture
if (!GetGWorldPixMap(gworld) || !LockPixels(GetGWorldPixMap(gworld))) {
throw QTImportExportException(0, "GetGWorldPixMap failed");
}
//*** Draw GWorld into our Memory Texture!
GraphicsImportDraw(gicomp);
// Clean up
UnlockPixels(GetGWorldPixMap(gworld));
SetGWorld(origPort, origDevice); // set graphics port to offscreen (we don't need it now)
DisposeGWorld(gworld);
CloseComponent(gicomp);
DisposeHandle(reinterpret_cast<char **>(desc));
DisposeHandle(dataRef);
}
catch (QTImportExportException& e)
{
setError(e.what());
if (gworld) {
UnlockPixels(GetGWorldPixMap(gworld));
SetGWorld(origPort, origDevice); // set graphics port to offscreen (we don't need it now)
DisposeGWorld(gworld);
}
if (gicomp)
CloseComponent(gicomp);
if (desc)
DisposeHandle(reinterpret_cast<char **>(desc));
if (imageData)
delete[] imageData;
if (dataRef)
DisposeHandle(dataRef);
return NULL;
}
unsigned int bytesPerPixel = depth / 8;
unsigned int glpixelFormat;
switch(bytesPerPixel) {
case 3 :
glpixelFormat = GL_RGB;
break;
case 4 :
glpixelFormat = GL_RGBA;
break;
default :
delete[] imageData;
setError("unknown pixelformat");
return NULL;
break;
}
unsigned char* swizzled = pepareBufferForOSG(imageData, bytesPerPixel, xsize, ysize);
delete[] imageData;
osg::Image* image = new osg::Image();
image->setFileName(fileTypeHint.c_str());
image->setImage(xsize,ysize,1,
bytesPerPixel,
glpixelFormat,
GL_UNSIGNED_BYTE,
swizzled,
osg::Image::USE_NEW_DELETE );
return image;
}
GLuint platformLoadTextureFile(string theFilename, bool generateMipmaps, int *width, int *height)
{
#ifdef QuickTimeInstalled
GLuint textureName; // the "name" by which OpenGL knows the texture
unsigned char *pImageBuffer; // the buffer that contains the image data
GWorldPtr pGWorld; // a gworld to load the image into
int imageDepth;
FSSpec fsspecImage; // FSSpec of the image to load
#ifdef __APPLE__
CFURLRef imageURL;
FSRef imagefsRef;
#endif
OSStatus err = noErr; // err return value
long rowStride; // length, in bytes, of a pixel row in the image
GraphicsImportComponent giComp; // component for importing image
MatrixRecord matrix;
Rect rectImage; // rectangle of source image
PixMapHandle hPixMap; // handle to image pix map
ImageDescriptionHandle hImageDesc; // handle to image description used to get image depth
long imageWidth;
long imageHeight;
float imageAspect;
long textureWidth;
long textureHeight;
// get the full path to the texture file
string fileLocation;
fileLocation = pathToResourceDirectory() + theFilename;
#ifdef __APPLE__
// create a URL to the file from the C string
imageURL = CFURLCreateWithBytes (kCFAllocatorDefault, (UInt8 *)fileLocation.c_str(), fileLocation.length(), kCFStringEncodingASCII, NULL);
if (imageURL == NULL)
{
cout << "error getting URL for image file (image file may not exist): " << theFilename << endl;
return 0;
}
// get a FSRef from the URL
if (!CFURLGetFSRef(imageURL, &imagefsRef))
{
cout << "error getting FSRef for image file:: " << theFilename << endl;
CFRelease(imageURL);
return 0;
}
// get the FSSpec from the FSRef
if (FSGetCatalogInfo (&imagefsRef, kFSCatInfoNone, NULL, NULL, &fsspecImage, NULL))
{
cout << "error getting FSSpec for image file: " << theFilename << endl;
CFRelease(imageURL);
return 0;
}
// release the URL (not needed any more)
CFRelease(imageURL);
#endif
#ifdef _WIN32
// get an FSSpec from the pathname
if (NativePathNameToFSSpec ((char *)fileLocation.c_str(), &fsspecImage, kErrorIfFileNotFound))
{
cout << "error getting FSSpec for image file: " << fileLocation << endl;
return 0;
}
#endif
// save the onscreen graphics port
GDHandle origDevice;
CGrafPtr origPort;
GetGWorld (&origPort, &origDevice);
// get an importer for the file
err = GetGraphicsImporterForFileWithFlags (&fsspecImage, &giComp, kDontUseValidateToFindGraphicsImporter);
if (err != noErr) return 0;
// get the image bounds
err = GraphicsImportGetNaturalBounds (giComp, &rectImage);
if (err != noErr) return 0;
// create a handle for the image description and lock it
hImageDesc = (ImageDescriptionHandle) NewHandle (sizeof (ImageDescriptionHandle));
HLock ((Handle) hImageDesc);
// retrieve the image description
err = GraphicsImportGetImageDescription (giComp, &hImageDesc);
if (err != noErr) return 0;
// find width and height
imageWidth = (int) (rectImage.right - rectImage.left);
imageHeight = (int) (rectImage.bottom - rectImage.top);
// now calculate the aspect ratio (width/height), used to restore image correctly
imageAspect = ((float) imageWidth) / ((float) imageHeight);
// get the image's pixel depth
imageDepth = (**hImageDesc).depth;
// find nearest acceptable texture size (width and height) for the image
textureWidth = GetTextureDimFromImageDim (imageWidth);
textureHeight = GetTextureDimFromImageDim (imageHeight);
// pass the optimised (and scaled) size back out to the caller
*width = textureWidth;
*height = textureHeight;
// set texture rectangle for creation of GWorld
#ifdef __APPLE__
SetRect (&rectImage, 0, 0, (int) textureWidth, (int) textureHeight);
#endif
#ifdef _WIN32
MacSetRect (&rectImage, 0, 0, (int) textureWidth, (int) textureHeight);
#endif
// set stride in bytes width of image * 4 bytes per pixel
rowStride = textureWidth * 4;
// build new buffer exact size of image (stride * height)
pImageBuffer = (unsigned char *) NewPtr (rowStride * textureHeight);
// check we got the buffer we wanted
if (pImageBuffer == NULL)
{
// failed - release the component and return an error
CloseComponent(giComp);
return 0;
}
// create a new gworld using our unpadded buffer, setting the pixel type correctly for the expected image depth
#ifdef __BIG_ENDIAN__
QTNewGWorldFromPtr (&(pGWorld), k32ARGBPixelFormat, &rectImage, NULL, NULL, 0, pImageBuffer, rowStride);
#else
QTNewGWorldFromPtr (&(pGWorld), k32RGBAPixelFormat, &rectImage, NULL, NULL, 0, pImageBuffer, rowStride);
#endif
// could we allocate the GWorld?
if (pGWorld == NULL)
{
// failed - release the buffer, component and return an error
DisposePtr ((Ptr) pImageBuffer);
CloseComponent(giComp);
return 0;
}
// build a transformation matrix to scale the image to the texture size
// this also flips the image horizontally, so that texture coordinates map correctly
float horizontalScale = (float) textureWidth / (float) imageWidth;
float verticalScale = (float) textureHeight / (float) imageHeight;
SetIdentityMatrix (&matrix);
ScaleMatrix (&matrix, X2Fix(horizontalScale), X2Fix(-verticalScale), 0, 0);
TranslateMatrix (&matrix, 0, X2Fix((float)textureHeight));
// set the matrix as the importer matrix
err = GraphicsImportSetMatrix(giComp, &matrix);
// set the destination of the importer component
if (err == noErr) err = GraphicsImportSetGWorld (giComp, pGWorld, NULL);
// ensure lossless decompression (if the CODEC supports this)
if (err == noErr) err = GraphicsImportSetQuality(giComp, codecLosslessQuality);
if (err != noErr)
{
// failed - release the GWorld, buffer, component and return an error
DisposeGWorld (pGWorld);
DisposePtr ((Ptr) pImageBuffer);
CloseComponent(giComp);
return 0;
}
// get the address of the GWorld's pixmap
hPixMap = GetGWorldPixMap (pGWorld);
// if everything looks good draw the image to the locked pixmap
if ((hPixMap) && (LockPixels (hPixMap)))
GraphicsImportDraw (giComp);
else
{
// the pixmap doesn't exist, or we couldn't lock it
// release the GWorld, buffer, component and return an error
DisposeGWorld (pGWorld);
DisposePtr ((Ptr) pImageBuffer);
CloseComponent(giComp);
return 0;
}
// for images without an alpha channel, initialise the alpha bytes since QuickTime won't
if (imageDepth < 32)
{
#ifdef __BIG_ENDIAN__
for( unsigned char *p = pImageBuffer; p < pImageBuffer + (rowStride * textureHeight); p+=4)
*p = 0xFF;
#else
for( unsigned char *p = pImageBuffer+3; p < pImageBuffer + (rowStride * textureHeight) +3; p+=4)
*p = 0xFF;
#endif
}
// unlock the pixmap
UnlockPixels (hPixMap);
// dump the component
CloseComponent(giComp);
// set image width in groups (pixels), accounts for border this ensures proper image alignment row to row
glPixelStorei (GL_UNPACK_ROW_LENGTH, textureWidth);
// generate a "name" for the texture
glGenTextures (1, &textureName);
// create the texture in OpenGL
glBindTexture(GL_TEXTURE_2D, textureName);
// tell OpenGL about the texture and have GLU build mipmaps
#ifdef __BIG_ENDIAN__
glTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA, textureWidth, textureHeight, 0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, pImageBuffer);
#else
glTexImage2D (GL_TEXTURE_2D, 0, GL_RGBA, textureWidth, textureHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, pImageBuffer);
#endif
if (generateMipmaps)
#ifdef __BIG_ENDIAN__
if (gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA, textureWidth, textureHeight, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, pImageBuffer) != 0)
#else
if (gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA, textureWidth, textureHeight, GL_RGBA, GL_UNSIGNED_BYTE, pImageBuffer) != 0)
#endif
// good time to check for errors?
openGLCheckError();
// finished with the GWorld but not the image buffer (it's used by OpenGL as the "live" image buffer)
DisposeGWorld (pGWorld);
// restore the current graphics port we saved earlier
SetGWorld(origPort, origDevice);
// all done - return the texture name
return textureName;
#endif // QuickTimeInstalled
}
//=============================================================================
// QutTexture_CreateGWorldFromFile : Create a GWorld from a file.
//-----------------------------------------------------------------------------
GWorldPtr
QutTexture_CreateGWorldFromFile(const FSSpec *theFSSpec, TQ3PixelType pixelType)
{ CTabHandle colourTableHnd;
ImageDescriptionHandle imageDescHnd;
ComponentInstance theImporter;
GWorldPtr theGWorld;
TQ3Uns32 theDepth;
Rect theRect;
OSErr theErr;
// Initialise ourselves
theImporter = NULL;
theGWorld = NULL;
imageDescHnd = NULL;
colourTableHnd = NULL;
theDepth = (pixelType == kQ3PixelTypeARGB16 || pixelType == kQ3PixelTypeRGB16) ? 16 : 32;
// Create the importer
theErr = GetGraphicsImporterForFile(theFSSpec, &theImporter);
// Query the importer for the information we need
if (theErr == noErr)
{
GraphicsImportGetBoundsRect(theImporter, &theRect);
theErr = GraphicsImportGetImageDescription(theImporter, &imageDescHnd);
if (theErr == noErr)
theErr = GetImageDescriptionCTable(imageDescHnd, &colourTableHnd);
}
// Create the GWorld
if (theErr == noErr)
theErr = NewGWorld(&theGWorld, theDepth, &theRect, colourTableHnd, NULL,
useTempMem | kQ3NativeEndianPixMap );
// Draw the image into the GWorld
if (theErr == noErr)
{
GraphicsImportSetGWorld(theImporter, theGWorld, NULL);
GraphicsImportDraw(theImporter);
}
// Clean up
if (theImporter != NULL)
CloseComponent(theImporter);
if (imageDescHnd != NULL)
DisposeHandle((Handle) imageDescHnd);
if (colourTableHnd != NULL)
DisposeCTable(colourTableHnd);
return(theGWorld);
}
GWorldPtr OpenImage (void)
{
unsigned long rowStride;
GraphicsImportComponent giComp;
NavReplyRecord replyNav;
NavTypeListHandle hTypeList = (NavTypeListHandle) NewHandleClear (sizeof (NavTypeList) + sizeof (OSType) * 13);
FSSpec fsspecImage;
AEKeyword theKeyword;
DescType actualType;
Size actualSize;
OSStatus err = noErr;
Rect rectImage;
GDHandle origDevice;
CGrafPtr origPort;
PixMapHandle hPixMap;
ImageDescriptionHandle hImageDesc;
MatrixRecord matrix;
GWorldPtr pGWorld;
unsigned char * pImageBuffer;
long imageWidth;
long imageHeight;
float imageAspect;
long imageDepth;
long textureWidth;
long textureHeight;
GetGWorld (&origPort, &origDevice); // save onscreen graphics port
HLock ((Handle) hTypeList);
(**hTypeList).osTypeCount = 14;
(**hTypeList).osType[0] = 'qtif';
(**hTypeList).osType[1] = 'SGI ';
(**hTypeList).osType[2] = '8BPS';
(**hTypeList).osType[3] = 'GIF ';
(**hTypeList).osType[4] = 'GIFf';
(**hTypeList).osType[5] = 'JPEG';
(**hTypeList).osType[6] = 'JPG ';
(**hTypeList).osType[7] = 'PICT';
(**hTypeList).osType[8] = 'PNTG';
(**hTypeList).osType[9] = 'grip';
(**hTypeList).osType[10] = 'BMPp';
(**hTypeList).osType[11] = 'TIFF';
(**hTypeList).osType[12] = 'TEXT';
(**hTypeList).osType[13] = '????';
err = NavChooseFile (NULL, &replyNav, NULL, NULL, NULL, NULL, hTypeList, NULL);
if ((err == noErr) && (replyNav.validRecord))
err = AEGetNthPtr (&(replyNav.selection), 1, typeFSS, &theKeyword, &actualType,
&fsspecImage, sizeof (fsspecImage), &actualSize);
NavDisposeReply (&replyNav);
if (err != noErr)
return NULL;
GetGraphicsImporterForFile (&fsspecImage, &giComp);
if (err != noErr)
return NULL;
// create GWorld
err = GraphicsImportGetNaturalBounds (giComp, &rectImage);
if (err != noErr)
return NULL;
hImageDesc = (ImageDescriptionHandle) NewHandle (sizeof (ImageDescriptionHandle));
HLock ((Handle) hImageDesc);
err = GraphicsImportGetImageDescription (giComp, &hImageDesc);
if (err != noErr)
return NULL;
imageWidth = rectImage.right - rectImage.left;
imageHeight = rectImage.bottom - rectImage.top;
imageAspect = ((float) imageWidth) / ((float) imageHeight);
imageDepth = (**hImageDesc).depth; // bits
if (imageDepth <= 16)
imageDepth = 16;
else
imageDepth = 32;
#if 1
textureWidth = imageWidth;//40;//imageWidth;//256;
textureHeight = imageHeight;//40 * imageHeight / imageWidth;//imageHeight;//256;
#else
textureWidth = imageWidth;//256;
textureHeight = imageHeight;//256;
#endif
SetRect (&rectImage, 0, 0, textureWidth, textureHeight); // l, t, r. b reset to texture rectangle
rowStride = textureWidth * imageDepth / 8;
pImageBuffer = (unsigned char *) NewPtrClear (rowStride * (textureHeight));
if (imageDepth == 32)
QTNewGWorldFromPtr (&(pGWorld), k32ARGBPixelFormat, &rectImage, NULL, NULL, 0, pImageBuffer, rowStride);
else
QTNewGWorldFromPtr (&(pGWorld), k16BE555PixelFormat, &rectImage, NULL, NULL, 0, pImageBuffer, rowStride);
if (NULL == pGWorld)
return NULL;
// decompress to gworld
SetIdentityMatrix (&matrix);
ScaleMatrix (&matrix, X2Fix ((float) textureWidth / (float) imageWidth), X2Fix ((float) textureHeight / (float) imageHeight), X2Fix (0.0), X2Fix (0.0));
err = GraphicsImportSetMatrix(giComp, &matrix);
if (err != noErr)
return NULL;
err = GraphicsImportSetGWorld (giComp, pGWorld, NULL);
if (err != noErr)
return NULL;
err = GraphicsImportSetQuality(giComp, codecLosslessQuality);
if (err != noErr)
return NULL;
hPixMap = GetGWorldPixMap (pGWorld);
if ((hPixMap) && (LockPixels (hPixMap))) // lock offscreen pixel map
GraphicsImportDraw (giComp);
else
return NULL;
// modify alpha
if ( imageDepth == 32 )
{
unsigned long i;
unsigned long * pixel = (unsigned long *)GetPixBaseAddr( hPixMap );
for (i = 0; i < textureWidth * textureHeight; i++)
{
if ((*pixel & 0x00FFFFFF) == 0x00FF00) // mask only color bits and look for green
*pixel = 0x00000000;//0x00303040; // replace green with dark gray transparent (to help filtering)
else
*pixel |= 0xFF000000; // ensure alpha is set for opaque pixels
pixel++;
}
}
else
{
unsigned short i;
unsigned short * pixel = (unsigned short *)GetPixBaseAddr( hPixMap );
for (i = 0; i < textureWidth * textureHeight; i++)
{
if ((*pixel & 0x7FFF) == 0x03E0) // mask only color bits and look for green
*pixel = 0x0000;//0x0363; // replace green with dark gray transparent (to help filtering)
else
*pixel |= 0x8000; // ensure alpha is set for opaque pixels
pixel++;
}
}
return pGWorld;
}
bool LoadTexture(IplTexture *tex, const char *filename, const char *subdir)
{
ComponentInstance fileImporter;
OSErr error;
ImageDescriptionHandle imageInfo;
ComponentResult err;
CFStringRef name = CFStringCreateWithCStringNoCopy(NULL, filename, kCFStringEncodingASCII, NULL);
CFStringRef _subdir = CFStringCreateWithCStringNoCopy(NULL, subdir, kCFStringEncodingASCII, NULL);
CFURLRef texture_url = CFBundleCopyResourceURL(
CFBundleGetMainBundle(),
name,
NULL,
_subdir);
// Create the data reference so we can get the file's graphics importer.
Handle dataRef;
OSType dataRefType;
dataRef = NewHandle(sizeof(AliasHandle));
// The second parameter to QTNewDataReferenceFromCFURL is flags.
// It should be set to 0.
error = QTNewDataReferenceFromCFURL(texture_url, 0, &dataRef, &dataRefType);
if(error != noErr) {
//DisposeHandle(dataRef);
//CFRelease(texture_url);
return false;
}
// Get the importer for the file so we can read the information.
error = GetGraphicsImporterForDataRef(dataRef, dataRefType, &fileImporter);
// Retrieve information about the image
imageInfo = (ImageDescriptionHandle)NewHandle(sizeof(ImageDescription));
err = GraphicsImportGetImageDescription(fileImporter, &imageInfo);
unsigned width = ((**imageInfo).width);
unsigned height = ((**imageInfo).height);
IplImage *im = tex->getIm();
if (im && (im->width != width || im->height!=height))
cvReleaseImage(&im);
if (im==0) {
im = cvCreateImage(cvSize(width,height), IPL_DEPTH_8U, 4);
//memset(im->imageData, 0x8f, 30*im->widthStep );
//memset(im->imageData+ 50*im->widthStep, 0xff, 30*im->widthStep);
tex->setImage(im);
//return true;
}
tex->update();
void *imageData = im->imageData;
// Get the boundary rectangle of the image
Rect imageRect;
err = GraphicsImportGetNaturalBounds(fileImporter, &imageRect);
// Create an offscreen buffer to hold the image.
// Apparently QuickTime requires a GWorld to
// decompress a texture file.
long bytesPerRow = im->widthStep;
//static
GWorldPtr offscreenBuffer=0;
if (offscreenBuffer==0) {
error = QTNewGWorldFromPtr(&offscreenBuffer, k32RGBAPixelFormat, &imageRect,
NULL, NULL, kNativeEndianPixMap, imageData, bytesPerRow);
assert(error == noErr);
}
// Draw the image into the offscreen buffer
err = GraphicsImportSetGWorld(fileImporter, offscreenBuffer, NULL);
assert(err == noErr);
err = GraphicsImportDraw(fileImporter);
assert(err == noErr);
// Cleanup
error = CloseComponent(fileImporter);
DisposeHandle((Handle)imageInfo);
DisposeHandle(dataRef);
DisposeGWorld(offscreenBuffer);
return true;
}