95 lines
2.3 KiB
C++
95 lines
2.3 KiB
C++
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#include "trop.h"
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#include "tpixelutils.h"
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#define FLOOR(x) ((int)(x) > (x) ? (int)(x)-1 : (int)(x))
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/*
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inline bool isInFirstColor(const TDimensionD &dim,int x, int y,const TPointD
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&offset)
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{
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int lx=dim.lx;
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int ly=dim.ly;
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int offX,offY;
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offX = offset.x>=0 ? (int)offset.x : (int)(lx-offset.x);
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offY = offset.y>=0 ? (int)offset.y : (int)(ly-offset.y);
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if ((( ((int)(offX+x))/lx + ((int)(offY+y))/ly )%2 ) == 0)
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return false;
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return true;
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}
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*/
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//-----------------------------------------------------------------------------
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namespace {
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template <typename PIXEL>
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void do_checkBoard(TRasterPT<PIXEL> rout, const PIXEL &pix1, const PIXEL &pix2,
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const TDimensionD &dim, const TPointD &offset) {
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assert(dim.lx > 0);
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assert(dim.ly > 0);
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double freqX = 0.5 / dim.lx;
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double freqY = 0.5 / dim.ly;
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double phaseX = 0;
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if (offset.x >= 0) {
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double q = offset.x * freqX;
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phaseX = (q - floor(q));
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} else {
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double q = (-offset.x * freqX);
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phaseX = 1.0 - (q - floor(q));
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}
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double phaseY = 0;
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if (offset.y >= 0) {
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double q = offset.y * freqY;
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phaseY = (q - floor(q));
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} else {
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double q = (-offset.y * freqY);
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phaseY = 1.0 - (q - floor(q));
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}
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int lx = rout->getLx();
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int ly = rout->getLy();
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for (int y = 0; y < ly; y++) {
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double yy = 2.0 * (phaseY + y * freqY);
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int iy = FLOOR(yy);
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assert(iy == (int)floor(yy));
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rout->lock();
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PIXEL *pix = rout->pixels(y);
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for (int x = 0; x < lx; x++) {
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double xx = 2.0 * (phaseX + x * freqX);
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int ix = FLOOR(xx);
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assert(ix == (int)floor(xx));
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if ((ix ^ iy) & 1)
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*pix++ = pix1;
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else
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*pix++ = pix2;
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}
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rout->unlock();
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}
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}
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} // namespace
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//-----------------------------------------------------------------------------
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void TRop::checkBoard(TRasterP rout, const TPixel32 &pix1, const TPixel32 &pix2,
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const TDimensionD &dim, const TPointD &offset) {
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// assert(offset.x<=dim.lx && offset.y<=dim.ly);
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TRaster32P rout32 = rout;
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if (rout32)
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do_checkBoard<TPixel32>(rout32, pix1, pix2, dim, offset);
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else {
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TRaster64P rout64 = rout;
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if (rout64)
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do_checkBoard<TPixel64>(rout64, toPixel64(pix1), toPixel64(pix2), dim,
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offset);
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else
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throw TRopException("unsupported pixel type");
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}
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}
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