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/* Copyright (C) 2000-2011 by George Williams */
/*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "fontforgeui.h"
#include <math.h>
void CVMouseDownTransform(CharView *cv) {
CVPreserveTState(cv);
}
void CVMouseMoveTransform(CharView *cv) {
real transform[6];
CVRestoreTOriginalState(cv);
if ( cv->info.x != cv->p.cx || cv->info.y != cv->p.cy ) {
transform[0] = transform[3] = 1;
transform[1] = transform[2] = 0;
switch ( cv->active_tool ) {
case cvt_rotate: {
real angle = atan2(cv->info.y-cv->p.cy,cv->info.x-cv->p.cx);
transform[0] = transform[3] = cos(angle);
transform[2] = -(transform[1] = sin(angle));
} break;
case cvt_flip: {
real dx,dy;
if (( dx = cv->info.x-cv->p.cx)<0 ) dx=-dx;
if (( dy = cv->info.y-cv->p.cy)<0 ) dy=-dy;
if ( dy>2*dx )
transform[0] = -1;
else if ( dx>2*dy )
transform[3] = -1;
else if ( (cv->info.x-cv->p.cx)*(cv->info.y-cv->p.cy)>0 ) {
transform[0] = transform[3] = 0;
transform[1] = transform[2] = -1;
} else {
transform[0] = transform[3] = 0;
transform[1] = transform[2] = 1;
}
} break;
case cvt_scale: {
transform[0] = 1.0+(cv->info.x-cv->p.cx)/(400*cv->scale);
transform[3] = 1.0+(cv->info.y-cv->p.cy)/(400*cv->scale);
} break;
case cvt_skew: {
real angle = atan2(cv->info.y-cv->p.cy,cv->info.x-cv->p.cx);
transform[2] = sin(angle);
} break;
case cvt_3d_rotate: {
real angle = atan2(cv->info.y-cv->p.cy,cv->info.x-cv->p.cx);
/* Allow one pixel per degree */
real zangle = sqrt( (cv->info.x-cv->p.cx)*(cv->info.x-cv->p.cx) +
(cv->info.y-cv->p.cy)*(cv->info.y-cv->p.cy) ) * cv->scale *
3.1415926535897932/180;
real s = sin(angle), c = cos(angle);
real cz = cos(zangle);
transform[0] = c*c + s*s*cz;
transform[3] = s*s + c*c*cz;
transform[2] = transform[1] = c*s * (cz-1);
} break;
/* Perspective takes three points: origin, start point, cur point */
/* first rotate so that orig/start are the x axis */
/* then define perspective so that: */
/* y' = y */
/* x' = cur.x + (cur.y - y)/cur.y * (x - cur.x) */
/* then rotate back */
case cvt_perspective: {
real angle = atan2(cv->p.cy,cv->p.cx);
real s = sin(angle), c = cos(angle);
transform[0] = transform[3] = c;
transform[2] = -(transform[1] = -s);
transform[4] = transform[5] = 0;
CVTransFunc(cv,transform,false);
CVYPerspective((CharViewBase *) cv,
c*cv->info.x + s*cv->info.y,
-s*cv->info.x + c*cv->info.y);
transform[2] = -(transform[1] = s);
} break;
default:
break;
}
/* Make the pressed point be the center of the transformation */
if ( cv->active_tool!=cvt_perspective ) {
transform[4] = -cv->p.cx*transform[0] -
cv->p.cy*transform[2] +
cv->p.cx;
transform[5] = -cv->p.cy*transform[3] -
cv->p.cx*transform[1] +
cv->p.cy;
}
CVSetCharChanged(cv,true);
CVTransFunc(cv,transform,false);
}
SCUpdateAll(cv->b.sc);
}
void CVMouseUpTransform(CharView *cv) {
if ( cv->info.x == cv->p.cx && cv->info.y == cv->p.cy ) {
/* Nothing happened */
cv->needsrasterize = cv->recentchange = false;
CVRemoveTopUndo(&cv->b);
SCUpdateAll(cv->b.sc);
} else
CVUndoCleanup(cv);
}
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