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- //========================================================================
- //
- // OutputDev.cc
- //
- // Copyright 1996 Derek B. Noonburg
- //
- //========================================================================
-
- #ifdef __GNUC__
- //#pragma implementation
- #endif
-
- #include <stddef.h>
- #include "OutputDev.h"
-
- void OutputDev::setCTM(double *ctm1) {
- int i;
- double det;
-
- for (i = 0; i < 6; ++i)
- ctm[i] = ctm1[i];
- det = 1 / (ctm[0] * ctm[3] - ctm[1] * ctm[2]);
- ictm[0] = ctm[3] * det;
- ictm[1] = -ctm[1] * det;
- ictm[2] = -ctm[2] * det;
- ictm[3] = ctm[0] * det;
- ictm[4] = (ctm[2] * ctm[5] - ctm[3] * ctm[4]) * det;
- ictm[5] = (ctm[1] * ctm[4] - ctm[0] * ctm[5]) * det;
- }
-
- void OutputDev::cvtDevToUser(int dx, int dy, double *ux, double *uy) {
- *ux = ictm[0] * dx + ictm[2] * dy + ictm[4];
- *uy = ictm[1] * dx + ictm[3] * dy + ictm[5];
- }
-
- void OutputDev::cvtUserToDev(double ux, double uy, int *dx, int *dy) {
- *dx = (int)(ctm[0] * ux + ctm[2] * uy + ctm[4] + 0.5);
- *dy = (int)(ctm[1] * ux + ctm[3] * uy + ctm[5] + 0.5);
- }
-