void
fgLoadImgAnyFormat(
const FgString & fname,
FgImgRgbaUb & img)
{
if (!fgFileReadable(fname))
fgThrow("Unable to read file",fname);
fgEnsureMagick();
FgScopePtr<ExceptionInfo> exception(AcquireExceptionInfo(),DestroyExceptionInfo);
FgScopePtr<ImageInfo> image_info(CloneImageInfo(0),DestroyImageInfo);
(void) strcpy(image_info->filename,fname.as_utf8_string().c_str());
// TODO: Do we need to convert into a specific colourspace?
Image *imgPtr = ReadImage(image_info.get(),exception.get());
if (imgPtr == 0)
// exception.description is NULL
fgThrow("Unable to read image file",fname + ": " + exception->reason);
FgScopeGuard sg0(boost::bind(DestroyImage,imgPtr));
FgScopePtr<CacheView> view(AcquireCacheView(imgPtr),DestroyCacheView);
img.resize(uint(imgPtr->columns),uint(imgPtr->rows));
for(uint row = 0; row < imgPtr->rows; ++row) {
for(uint column = 0; column < imgPtr->columns; ++column) {
PixelPacket pixel;
FGASSERT(MagickTrue ==
GetOneCacheViewAuthenticPixel(view.get(),column,row,&pixel,exception.get()));
img.elem(column,row).red() = uchar(pixel.red);
img.elem(column,row).green() = uchar(pixel.green);
img.elem(column,row).blue() = uchar(pixel.blue);
img.elem(column,row).alpha() = 255 - uchar(pixel.opacity);
}
}
}
FgImgRgbaUb
fgOglGetRender()
{
glReadBuffer(GL_FRONT);
FgImgRgbaUb ret;
GLint x[4];
glGetIntegerv(GL_VIEWPORT,x);
FgVect2UI dims(x[2],x[3]);
if (dims.volume() > 0) {
ret.resize(dims);
FgRgbaUB * ptr = ret.dataPtr();
for (uint yy=0; yy<dims[1]; ++yy) { // Invert line ordering from OGL:
glReadPixels(0,dims[1]-1-yy,dims[0],1,GL_RGBA,GL_UNSIGNED_BYTE,ptr);
ptr += dims[0];
}
}
glReadBuffer(GL_BACK); // Restore to default
return ret;
}
