diff options
Diffstat (limited to 'engines/wintermute/graphics/transform_tools.cpp')
| -rw-r--r-- | engines/wintermute/graphics/transform_tools.cpp | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/engines/wintermute/graphics/transform_tools.cpp b/engines/wintermute/graphics/transform_tools.cpp new file mode 100644 index 0000000000..dc92cdbbfd --- /dev/null +++ b/engines/wintermute/graphics/transform_tools.cpp @@ -0,0 +1,87 @@ +/* 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 2 + * 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, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + + +#include "engines/wintermute/graphics/transform_tools.h" +#include <math.h> + +namespace Wintermute { + +FloatPoint TransformTools::transformPoint(FloatPoint point, const float rotate, const Point32 &zoom, const bool mirrorX, const bool mirrorY) { + float rotateRad = rotate * M_PI / 180.0f; + 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; +} + +Rect32 TransformTools::newRect(const Rect32 &oldRect, const TransformStruct &transform, Point32 *newHotspot) { + Point32 nw(oldRect.left, oldRect.top); + Point32 ne(oldRect.right, oldRect.top); + Point32 sw(oldRect.left, oldRect.bottom); + Point32 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)); + } + + Rect32 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 Wintermute |