void _copyRowAndScale(const unsigned char* src, GLenum srcDataType, unsigned char* dest, GLenum dstDataType, int num, float scale)
{
switch(dstDataType)
{
case(GL_BYTE):
_copyRowAndScale(src, srcDataType, (char*)dest, num, scale);
break;
case(GL_UNSIGNED_BYTE):
_copyRowAndScale(src, srcDataType, (unsigned char*)dest, num, scale);
break;
case(GL_SHORT):
_copyRowAndScale(src, srcDataType, (short*)dest, num, scale);
break;
case(GL_UNSIGNED_SHORT):
_copyRowAndScale(src, srcDataType, (unsigned short*)dest, num, scale);
break;
case(GL_INT):
_copyRowAndScale(src, srcDataType, (int*)dest, num, scale);
break;
case(GL_UNSIGNED_INT):
_copyRowAndScale(src, srcDataType, (unsigned int*)dest, num, scale);
break;
case(GL_FLOAT):
_copyRowAndScale(src, srcDataType, (float*)dest, num, scale);
break;
}
}
void _copyRowAndScale(const unsigned char* src, GLenum srcDataType, DEST* dest, int num, float scale)
{
switch(srcDataType)
{
case(GL_BYTE):
_copyRowAndScale((char*)src, dest, num, scale);
break;
case(GL_UNSIGNED_BYTE):
_copyRowAndScale((unsigned char*)src, dest, num, scale);
break;
case(GL_SHORT):
_copyRowAndScale((short*)src, dest, num, scale);
break;
case(GL_UNSIGNED_SHORT):
_copyRowAndScale((unsigned short*)src, dest, num, scale);
break;
case(GL_INT):
_copyRowAndScale((int*)src, dest, num, scale);
break;
case(GL_UNSIGNED_INT):
_copyRowAndScale((unsigned int*)src, dest, num, scale);
break;
case(GL_FLOAT):
_copyRowAndScale((float*)src, dest, num, scale);
break;
}
}
bool copyImage(const osg::Image* srcImage, int src_s, int src_t, int src_r, int width, int height, int depth,
osg::Image* destImage, int dest_s, int dest_t, int dest_r, bool doRescale)
{
if ((src_s+width) > (dest_s + destImage->s()))
{
OSG_NOTICE<<"copyImage("<<srcImage<<", "<<src_s<<", "<< src_t<<", "<<src_r<<", "<<width<<", "<<height<<", "<<depth<<std::endl;
OSG_NOTICE<<" "<<destImage<<", "<<dest_s<<", "<< dest_t<<", "<<dest_r<<", "<<doRescale<<")"<<std::endl;
OSG_NOTICE<<" input width too large."<<std::endl;
return false;
}
if ((src_t+height) > (dest_t + destImage->t()))
{
OSG_NOTICE<<"copyImage("<<srcImage<<", "<<src_s<<", "<< src_t<<", "<<src_r<<", "<<width<<", "<<height<<", "<<depth<<std::endl;
OSG_NOTICE<<" "<<destImage<<", "<<dest_s<<", "<< dest_t<<", "<<dest_r<<", "<<doRescale<<")"<<std::endl;
OSG_NOTICE<<" input height too large."<<std::endl;
return false;
}
if ((src_r+depth) > (dest_r + destImage->r()))
{
OSG_NOTICE<<"copyImage("<<srcImage<<", "<<src_s<<", "<< src_t<<", "<<src_r<<", "<<width<<", "<<height<<", "<<depth<<std::endl;
OSG_NOTICE<<" "<<destImage<<", "<<dest_s<<", "<< dest_t<<", "<<dest_r<<", "<<doRescale<<")"<<std::endl;
OSG_NOTICE<<" input depth too large."<<std::endl;
return false;
}
float scale = 1.0f;
if (doRescale && srcImage->getDataType() != destImage->getDataType())
{
switch(srcImage->getDataType())
{
case(GL_BYTE): scale = 1.0f/128.0f ; break;
case(GL_UNSIGNED_BYTE): scale = 1.0f/255.0f; break;
case(GL_SHORT): scale = 1.0f/32768.0f; break;
case(GL_UNSIGNED_SHORT): scale = 1.0f/65535.0f; break;
case(GL_INT): scale = 1.0f/2147483648.0f; break;
case(GL_UNSIGNED_INT): scale = 1.0f/4294967295.0f; break;
case(GL_FLOAT): scale = 1.0f; break;
}
switch(destImage->getDataType())
{
case(GL_BYTE): scale *= 128.0f ; break;
case(GL_UNSIGNED_BYTE): scale *= 255.0f; break;
case(GL_SHORT): scale *= 32768.0f; break;
case(GL_UNSIGNED_SHORT): scale *= 65535.0f; break;
case(GL_INT): scale *= 2147483648.0f; break;
case(GL_UNSIGNED_INT): scale *= 4294967295.0f; break;
case(GL_FLOAT): scale *= 1.0f; break;
}
}
if (srcImage->getPixelFormat() == destImage->getPixelFormat())
{
//OSG_NOTICE<<"copyImage("<<srcImage<<", "<<src_s<<", "<< src_t<<", "<<src_r<<", "<<width<<", "<<height<<", "<<depth<<std::endl;
//OSG_NOTICE<<" "<<destImage<<", "<<dest_s<<", "<< dest_t<<", "<<dest_r<<", "<<doRescale<<")"<<std::endl;
if (srcImage->getDataType() == destImage->getDataType() && !doRescale)
{
//OSG_NOTICE<<" Compatible pixelFormat and dataType."<<std::endl;
for(int slice = 0; slice<depth; ++slice)
{
for(int row = 0; row<height; ++row)
{
const unsigned char* srcData = srcImage->data(src_s, src_t+row, src_r+slice);
unsigned char* destData = destImage->data(dest_s, dest_t+row, dest_r+slice);
memcpy(destData, srcData, (width*destImage->getPixelSizeInBits())/8);
}
}
return true;
}
else
{
//OSG_NOTICE<<" Compatible pixelFormat and incompatible dataType."<<std::endl;
for(int slice = 0; slice<depth; ++slice)
{
for(int row = 0; row<height; ++row)
{
const unsigned char* srcData = srcImage->data(src_s, src_t+row, src_r+slice);
unsigned char* destData = destImage->data(dest_s, dest_t+row, dest_r+slice);
unsigned int numComponents = osg::Image::computeNumComponents(destImage->getPixelFormat());
_copyRowAndScale(srcData, srcImage->getDataType(), destData, destImage->getDataType(), (width*numComponents), scale);
}
}
return true;
}
}
else
{
//OSG_NOTICE<<"copyImage("<<srcImage<<", "<<src_s<<", "<< src_t<<", "<<src_r<<", "<<width<<", "<<height<<", "<<depth<<std::endl;
//OSG_NOTICE<<" "<<destImage<<", "<<dest_s<<", "<< dest_t<<", "<<dest_r<<", "<<doRescale<<")"<<std::endl;
RecordRowOperator readOp(width);
WriteRowOperator writeOp;
for(int slice = 0; slice<depth; ++slice)
{
for(int row = 0; row<height; ++row)
{
// reset the indices to beginning
readOp._pos = 0;
writeOp._pos = 0;
// read the pixels into readOp's _colour array
readRow(width, srcImage->getPixelFormat(), srcImage->getDataType(), srcImage->data(src_s,src_t+row,src_r+slice), readOp);
// pass readOp's _colour array contents over to writeOp (note this is just a pointer swap).
writeOp._colours.swap(readOp._colours);
modifyRow(width, destImage->getPixelFormat(), destImage->getDataType(), destImage->data(dest_s, dest_t+row,dest_r+slice), writeOp);
// return readOp's _colour array contents back to its rightful owner.
writeOp._colours.swap(readOp._colours);
}
}
return false;
}
}