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;
}
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;
}
