mirror of
https://github.com/libretro/scummvm.git
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135 lines
3.2 KiB
C++
135 lines
3.2 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "common/util.h"
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#include "gob/surface.h"
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#include "gob/minigames/geisha/meter.h"
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namespace Gob {
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namespace Geisha {
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Meter::Meter(int16 x, int16 y, int16 width, int16 height, uint8 frontColor,
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uint8 backColor, int32 maxValue, Direction direction) :
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_x(x), _y(y), _width(width), _height(height), _frontColor(frontColor),
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_backColor(backColor), _value(0), _maxValue(maxValue), _direction(direction),
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_needUpdate(true), _surface(0) {
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}
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Meter::~Meter() {
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delete _surface;
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}
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int32 Meter::getMaxValue() const {
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return _maxValue;
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}
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int32 Meter::getValue() const {
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return _value;
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}
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void Meter::setValue(int32 value) {
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value = CLIP<int32>(value, 0, _maxValue);
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if (_value == value)
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return;
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_value = value;
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_needUpdate = true;
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}
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void Meter::setMaxValue() {
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setValue(_maxValue);
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}
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int32 Meter::increase(int32 n) {
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if (n < 0)
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return decrease(-n);
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int32 overflow = MAX<int32>(0, (_value + n) - _maxValue);
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int32 value = CLIP<int32>(_value + n, 0, _maxValue);
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if (_value == value)
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return overflow;
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_value = value;
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_needUpdate = true;
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return overflow;
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}
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int32 Meter::decrease(int32 n) {
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if (n < 0)
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return increase(-n);
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int32 underflow = -MIN<int32>(0, _value - n);
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int32 value = CLIP<int32>(_value - n, 0, _maxValue);
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if (_value == value)
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return underflow;
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_value = value;
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_needUpdate = true;
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return underflow;
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}
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void Meter::draw(Surface &dest, int16 &left, int16 &top, int16 &right, int16 &bottom) {
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if (!_surface) {
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_surface = new Surface(_width, _height, dest.getBPP());
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_needUpdate = true;
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}
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update();
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left = CLIP<int16>(_x , 0, dest.getWidth () - 1);
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top = CLIP<int16>(_y , 0, dest.getHeight() - 1);
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right = CLIP<int16>(_x + _width - 1, 0, dest.getWidth () - 1);
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bottom = CLIP<int16>(_y + _height - 1, 0, dest.getHeight() - 1);
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dest.blit(*_surface, left - _x, top - _y, _width, _height, left, top);
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}
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void Meter::update() {
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if (!_needUpdate)
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return;
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_needUpdate = false;
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_surface->fill(_backColor);
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int32 n = (int32)floor((((float) _width) / _maxValue * _value) + 0.5);
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if (n <= 0)
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return;
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if (_direction == kFillToLeft)
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_surface->fillRect(_width - n, 0, _width - 1, _height - 1, _frontColor);
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else
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_surface->fillRect(0 , 0, n - 1, _height - 1, _frontColor);
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}
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} // End of namespace Geisha
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} // End of namespace Gob
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