mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-05 00:36:57 +00:00
88 lines
3.0 KiB
C++
88 lines
3.0 KiB
C++
/* ScummVM - Graphic Adventure Engine
|
|
*
|
|
* ScummVM is the legal property of its developers, whose names
|
|
* are too numerous to list here. Please refer to the COPYRIGHT
|
|
* file distributed with this source distribution.
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
|
|
#include "graphics/transform_tools.h"
|
|
#include "common/math.h"
|
|
#include <math.h>
|
|
|
|
namespace Graphics {
|
|
|
|
FloatPoint TransformTools::transformPoint(FloatPoint point, const float rotate, const Common::Point &zoom, const bool mirrorX, const bool mirrorY) {
|
|
float rotateRad = Common::deg2rad<float>(rotate);
|
|
float x = point.x;
|
|
float y = point.y;
|
|
x = (x * zoom.x) / kDefaultZoomX;
|
|
y = (y * zoom.y) / kDefaultZoomY;
|
|
#if 0
|
|
// TODO: Mirroring should be done before rotation, but the blitting
|
|
// code does the inverse, so we match that for now.
|
|
if (mirrorX)
|
|
x *= -1;
|
|
if (mirrorY)
|
|
y *= -1;
|
|
#endif
|
|
FloatPoint newPoint;
|
|
newPoint.x = x * cos(rotateRad) - y * sin(rotateRad);
|
|
newPoint.y = x * sin(rotateRad) + y * cos(rotateRad);
|
|
if (mirrorX) {
|
|
newPoint.x *= -1;
|
|
}
|
|
if (mirrorY) {
|
|
newPoint.y *= -1;
|
|
}
|
|
return newPoint;
|
|
}
|
|
|
|
Common::Rect TransformTools::newRect(const Common::Rect &oldRect, const TransformStruct &transform, Common::Point *newHotspot) {
|
|
Common::Point nw(oldRect.left, oldRect.top);
|
|
Common::Point ne(oldRect.right, oldRect.top);
|
|
Common::Point sw(oldRect.left, oldRect.bottom);
|
|
Common::Point se(oldRect.right, oldRect.bottom);
|
|
|
|
FloatPoint nw1, ne1, sw1, se1;
|
|
|
|
nw1 = transformPoint(nw - transform._hotspot, transform._angle, transform._zoom);
|
|
ne1 = transformPoint(ne - transform._hotspot, transform._angle, transform._zoom);
|
|
sw1 = transformPoint(sw - transform._hotspot, transform._angle, transform._zoom);
|
|
se1 = transformPoint(se - transform._hotspot, transform._angle, transform._zoom);
|
|
|
|
float top = MIN(nw1.y, MIN(ne1.y, MIN(sw1.y, se1.y)));
|
|
float bottom = MAX(nw1.y, MAX(ne1.y, MAX(sw1.y, se1.y)));
|
|
float left = MIN(nw1.x, MIN(ne1.x, MIN(sw1.x, se1.x)));
|
|
float right = MAX(nw1.x, MAX(ne1.x, MAX(sw1.x, se1.x)));
|
|
|
|
if (newHotspot) {
|
|
newHotspot->y = (uint32)(-floor(top));
|
|
newHotspot->x = (uint32)(-floor(left));
|
|
}
|
|
|
|
Common::Rect res;
|
|
res.top = (int32)(floor(top)) + transform._hotspot.y;
|
|
res.bottom = (int32)(ceil(bottom)) + transform._hotspot.y;
|
|
res.left = (int32)(floor(left)) + transform._hotspot.x;
|
|
res.right = (int32)(ceil(right)) + transform._hotspot.x;
|
|
|
|
return res;
|
|
}
|
|
|
|
} // End of namespace Graphics
|