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
}
void DisplayJPEGAndDisposeHandle( Handle imageData )
{
OSErr err;
Rect naturalBounds;
MatrixRecord matrix;
SInt32 gapH, gapV;
Fixed scaleH, scaleV;
Rect boundsRect;
GraphicsImportComponent grip;
Rect windowPortRect;
static char gifSentinel[] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};
static char jpegSentinel[] = {0xFF,0xD9,0xFF,0xD9,0xFF,0xD9,0xFF,0xD9,0xFF,0xD9,0xFF,0xD9,0xFF,0xD9,0xFF,0xD9};
Ptr sentinel;
Size sentinelSize;
if( !imageData )
{
ofLogNotice() << "NO IMAGE DATA" << endl;
} else {
ofImage image;
//ofPixels pixels();
//pixels = imageData;
//image.setFromPixels((const unsigned char *)imageData);
//string image
//image.saveImage(ofToDataPath(ofGetTimestampString()+".jpg", OF_IMAGE_QUALITY_BEST));
ofLogError() << "WE HAVE DATA!" << endl;
}
return;
again:
ofLogError() << "Again called";
if( 'G' == **imageData ) {
grip = gripG;
// for GIF:
// FF FF FF FF will ensure that the bit parser aborts, since you can't
// have two consecutive all-ones symbols in the LZW codestream --
// you can sometimes have one (say, a 9-bit code), but after consuming
// it the code width increases (so we're now using 10-bit codes)
// and the all-ones code won't be valid for a while yet.
sentinel = gifSentinel;
sentinelSize = sizeof(gifSentinel);
}
else {
grip = gripJ;
// for JPEG:
// FF D9 FF D9 will ensure (a) that the bit-parser aborts, since FF D9
// is an "unstuffed" FF and hence illegal in the entropy-coded datastream,
// and (b) be long enough to stop overreads.
sentinel = jpegSentinel;
sentinelSize = sizeof(jpegSentinel);
}
//•• add sentinel pattern to the end of the handle.
err = PtrAndHand( sentinel, imageData, sentinelSize );
err = GraphicsImportSetDataHandle( grip, imageData );
if( err )
{
ofLogNotice() << "GraphicsImportSetDataHandle Error" << endl;
goto bail;
}
err = GraphicsImportGetNaturalBounds( grip, &naturalBounds );
if( err )
{
ofLogNotice() << "GraphicsImportGetNaturalBounds Error" << endl;
goto bail;
}
//GetPortBounds( GetWindowPort( window ), &windowPortRect );
gapH = windowPortRect.right - naturalBounds.right;
gapV = windowPortRect.bottom - naturalBounds.bottom;
if( gapH >= 0 ) {
gapH = ((UInt16)Random()) % gapH;
scaleH = fixed1;
}
else {
gapH = 0;
scaleH = FixDiv( windowPortRect.right, naturalBounds.right );
}
if( gapV >= 0 ) {
gapV = ((UInt16)Random()) % gapV;
scaleV = fixed1;
}
else {
gapV = 0;
scaleV = FixDiv( windowPortRect.bottom, naturalBounds.bottom );
}
// need to use smaller scale of the two, and then recalc the other gap.
if( scaleH > scaleV ) {
scaleH = scaleV;
gapH = windowPortRect.right - FixMul(scaleH, naturalBounds.right);
gapH = ((UInt16)Random()) % gapH;
} else if( scaleH < scaleV ) {
scaleV = scaleH;
gapV = windowPortRect.bottom - FixMul(scaleV, naturalBounds.bottom);
gapV = ((UInt16)Random()) % gapV;
}
SetIdentityMatrix( &matrix );
ScaleMatrix( &matrix, scaleH, scaleV, 0, 0 );
TranslateMatrix( &matrix, gapH<<16, gapV<<16 );
err = GraphicsImportSetMatrix( grip, &matrix );
if( err ) goto bail;
err = GraphicsImportDraw( grip );
if( err ) goto bail;
err = GraphicsImportGetBoundsRect( grip, &boundsRect );
if( err ) goto bail;
InsetRect( &boundsRect, -1, -1 );
//SetPortWindowPort( window );
FrameRect( &boundsRect );
if( scanForAnotherImageMarker(imageData))
{
ofLogError() << "again: scanForAnotherImageMarker" << endl;
goto again;
}
bail:
DisposeHandle( imageData );
//gDrewJPEG = true;
}
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;
}
