int
avtImageReader::Read(char *input)
{
int size = 0;
//
// Find out how long the image is.
//
int length;
memcpy(&length, input, sizeof(int));
input += sizeof(int); size += sizeof(int);
//
// Save the image as one of our data members.
//
imgRep = avtImageRepresentation(input, length);
size += length;
haveReadImage = false;
GetOutputImage() = imgRep;
return size;
}
avtImage_p
avtMultiWindowSaver::CreateImage()
{
//
// Create a vtkImageData object to contain the tiled image.
//
const int nColorComponents = 3;
vtkImageData *newImage = vtkImageData::New();
newImage->SetDimensions(width, height, 1);
newImage->AllocateScalars(VTK_UNSIGNED_CHAR, nColorComponents);
unsigned char *out_ptr = (unsigned char *)newImage->GetScalarPointer();
int nLayers = 16;
for (int j = nLayers-1 ; j >= 0 ; j--)
{
for (int i = 0 ; i < 16 ; i++)
{
SaveSubWindowAttributes winAtts = atts.GetAttsForWindow(i+1);
if (winAtts.GetLayer() != j || winAtts.GetOmitWindow())
continue;
if (*(images[i]) == NULL)
continue;
int imgWidth = 0, imgHeight = 0;
images[i]->GetImage().GetSize(&imgHeight, &imgWidth);
if (imgWidth != winAtts.GetSize()[0] || imgHeight != winAtts.GetSize()[1])
{
EXCEPTION1(VisItException, "The image passed in to the multi-window save is "
"incorrectly sized. This is an internal error.");
}
int *pos = winAtts.GetPosition();
float t = winAtts.GetTransparency();
vtkImageData *img = images[i]->GetImage().GetImageVTK();
unsigned char *in_ptr = (unsigned char *)img->GetScalarPointer();
for (int h = 0 ; h < imgHeight ; h++)
{
int hh = h+pos[1];
if (hh < 0 || hh >= height)
continue;
for (int w = 0 ; w < imgWidth ; w++)
{
int ww = w+pos[0];
if (ww < 0 || ww >= width)
continue;
int indexOut = hh*width + ww;
int indexIn = h*imgWidth + w;
if (t == 0.0)
{
out_ptr[3*indexOut+0] = in_ptr[3*indexIn+0];
out_ptr[3*indexOut+1] = in_ptr[3*indexIn+1];
out_ptr[3*indexOut+2] = in_ptr[3*indexIn+2];
}
else
{
out_ptr[3*indexOut+0] = (1-t)*in_ptr[3*indexIn+0]+
t *out_ptr[3*indexOut+0];
out_ptr[3*indexOut+1] = (1-t)*in_ptr[3*indexIn+1]+
t *out_ptr[3*indexOut+1];
out_ptr[3*indexOut+2] = (1-t)*in_ptr[3*indexIn+2]+
t *out_ptr[3*indexOut+2];
}
}
}
}
}
//
// Now that we have a vtkImageData object, wrap it in something AVT likes.
//
avtImage_p retval = new avtImage(0);
retval->GetImage() = avtImageRepresentation(newImage);
newImage->Delete();
return retval;
}
