diff options
Diffstat (limited to 'graphics/transform_tools.h')
-rw-r--r-- | graphics/transform_tools.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/graphics/transform_tools.h b/graphics/transform_tools.h new file mode 100644 index 0000000000..c618f7c35a --- /dev/null +++ b/graphics/transform_tools.h @@ -0,0 +1,77 @@ +/* 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. + * + */ + +#ifndef GRAPHICS_TRANSFORM_TOOLS_H +#define GRAPHICS_TRANSFORM_TOOLS_H + +#include "common/rect.h" +#include "graphics/transform_struct.h" + +namespace Graphics { + + static const float kEpsilon = 0.00001; // arbitrarily taken number + + struct FloatPoint { + float x; + float y; + FloatPoint() : x(0), y(0) {} + FloatPoint(float x1, float y1) : x(x1), y(y1) {} + FloatPoint(const Common::Point p) : x(p.x), y(p.y) {} + bool operator==(const FloatPoint &p) const { return fabs(x - p.x) < kEpsilon && fabs(y - p.y) < kEpsilon; } + bool operator!=(const FloatPoint &p) const { return fabs(x - p.x) > kEpsilon || fabs(y - p.y) > kEpsilon; } + FloatPoint operator+(const FloatPoint &delta) const { return FloatPoint (x + delta.x, y + delta.y); } + FloatPoint operator-(const FloatPoint &delta) const { return FloatPoint (x - delta.x, y - delta.y); } + + FloatPoint& operator+=(const FloatPoint &delta) { + x += delta.x; + y += delta.y; + return *this; + } + FloatPoint& operator-=(const FloatPoint &delta) { + x -= delta.x; + y -= delta.y; + return *this; + } + }; + +class TransformTools { +public: + /** + * Basic transform (scale + rotate) for a single point + */ + static FloatPoint transformPoint(FloatPoint point, const float rotate, const Common::Point &zoom, const bool mirrorX = false, const bool mirrorY = false); + + /** + * @param &point the point on which the transform is to be applied + * @param rotate the angle in degrees + * @param &zoom zoom x,y in percent + * @param mirrorX flip along the vertical axis? + * @param mirrorY flip along the horizontal axis? + * @return the smallest rect that can contain the transformed sprite + * and, as a side-effect, "newHotspot" will tell you where the hotspot will + * have ended up in the new rect, for centering. + */ + static Common::Rect newRect(const Common::Rect &oldRect, const TransformStruct &transform, Common::Point *newHotspot); +}; + +} // End of namespace Wintermute +#endif |