Mercurial > octave-antonio
view examples/mystruct.c @ 17118:c97a26408ee0
Implement PixelRegion option for imread().
* imread.m: document new option.
* private/__imread__.m: parse new option and set defaults.
* __magick_read__.cc (calculate region): new option to calculate the region
to be read, shifts in memory required, and output image size.
(read_indexed_images, read_images): implement reading of only specific
regions of an image.
(__magick_read__): get octave_scalar_map at start for simplicity.
author | Carnë Draug <carandraug@octave.org> |
---|---|
date | Wed, 31 Jul 2013 21:28:48 +0100 |
parents | be41c30bcb44 |
children | 224e76250443 |
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#include "mex.h" void mexFunction (int nlhs, mxArray* plhs[], int nrhs, const mxArray* prhs[]) { int i; mwIndex j; mxArray *v; const char *keys[] = { "this", "that" }; if (nrhs != 1 || ! mxIsStruct (prhs[0])) mexErrMsgTxt ("expects struct"); for (i = 0; i < mxGetNumberOfFields (prhs[0]); i++) for (j = 0; j < mxGetNumberOfElements (prhs[0]); j++) { mexPrintf ("field %s(%d) = ", mxGetFieldNameByNumber (prhs[0], i), j); v = mxGetFieldByNumber (prhs[0], j, i); mexCallMATLAB (0, NULL, 1, &v, "disp"); } v = mxCreateStructMatrix (2, 2, 2, keys); mxSetFieldByNumber (v, 0, 0, mxCreateString ("this1")); mxSetFieldByNumber (v, 0, 1, mxCreateString ("that1")); mxSetFieldByNumber (v, 1, 0, mxCreateString ("this2")); mxSetFieldByNumber (v, 1, 1, mxCreateString ("that2")); mxSetFieldByNumber (v, 2, 0, mxCreateString ("this3")); mxSetFieldByNumber (v, 2, 1, mxCreateString ("that3")); mxSetFieldByNumber (v, 3, 0, mxCreateString ("this4")); mxSetFieldByNumber (v, 3, 1, mxCreateString ("that4")); if (nlhs) plhs[0] = v; }