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/* 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 "common/algorithm.h"
#include "access/asurface.h"
namespace Access {
/*------------------------------------------------------------------------*/
int ASurface::_leftSkip;
int ASurface::_rightSkip;
int ASurface::_topSkip;
int ASurface::_bottomSkip;
int ASurface::_clipWidth;
int ASurface::_clipHeight;
int ASurface::_lastBoundsX;
int ASurface::_lastBoundsY;
int ASurface::_lastBoundsW;
int ASurface::_lastBoundsH;
int ASurface::_scrollX;
int ASurface::_scrollY;
void ASurface::init() {
_leftSkip = _rightSkip = 0;
_topSkip = _bottomSkip = 0;
_clipWidth = _clipHeight = 0;
_lastBoundsX = _lastBoundsY = 0;
_lastBoundsW = _lastBoundsH = 0;
_scrollX = _scrollY = 0;
}
void ASurface::clearBuffer() {
byte *pSrc = (byte *)getPixels();
Common::fill(pSrc, pSrc + w * h, 0);
}
bool ASurface::clip(Common::Rect &r) {
int skip;
_leftSkip = _rightSkip = 0;
_topSkip = _bottomSkip = 0;
if (r.left > _clipWidth) {
skip = -r.left;
r.setWidth(r.width() - skip);
_leftSkip = skip;
r.moveTo(0, r.top);
}
else if (r.left >= 0)
return true;
int right = r.right - 1;
if (right < 0)
return true;
else if (right > _clipWidth) {
skip = right - _clipWidth;
r.setWidth(r.width() - skip);
_rightSkip = skip;
}
if (r.top > _clipHeight) {
skip = -r.top;
r.setHeight(r.height() - skip);
_topSkip = skip;
r.moveTo(r.left, 0);
}
else if (r.top >= 0)
return true;
int bottom = r.bottom - 1;
if (bottom < 0)
return true;
else if (bottom > _clipHeight) {
skip = bottom - _clipHeight;
_bottomSkip = skip;
r.setHeight(r.height() - skip);
}
return false;
}
void ASurface::plotImage(SpriteResource *sprite, int frameNum, const Common::Point &pt) {
SpriteFrame *frame = sprite->getFrame(frameNum);
Common::Rect r(pt.x, pt.y, pt.x + frame->w, pt.y + frame->h);
if (!clip(r)) {
_lastBoundsX = r.left;
_lastBoundsY = r.top;
_lastBoundsW = r.width();
_lastBoundsH = r.height();
plotFrame(frame, pt);
}
}
void ASurface::plotFrame(SpriteFrame *frame, const Common::Point &pt) {
byte *destP = (byte *)getBasePtr(pt.x, _scrollY + pt.y);
byte *srcP = frame->_data;
int8 leftVal1 = 18;
int8 leftVal2 = -8;
if (_leftSkip) {
++leftVal2;
leftVal1 = -12;
}
int8 rightVal = (_rightSkip) ? -7 : -8;
// Skip over any lines of the frame
for (int yp = 0; yp < _topSkip; ++yp) {
srcP += *(srcP + 1) + 2;
}
byte *srcLineP = srcP;
byte *destLineP = destP;
for (int yp = 0; yp < frame->h; ++yp, srcP = srcLineP, destP = destLineP) {
// Get length of line
int v = *srcP++;
int len = *srcP++;
srcLineP = srcP + len;
destLineP = destP + this->pitch;
// Draw the line of the frame
if (v != 0 || len != 0) {
warning("TODO: Line draw");
}
}
}
} // End of namespace Access
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