mirror of
https://github.com/libretro/scummvm.git
synced 2025-04-07 17:22:02 +00:00
68 lines
2.1 KiB
C++
68 lines
2.1 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 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 "graphics/scalerplugin.h"
|
|
|
|
SourceScaler::SourceScaler() : _oldSrc(NULL), _enable(false) {
|
|
}
|
|
|
|
SourceScaler::~SourceScaler() {
|
|
if (_oldSrc != NULL)
|
|
delete[] _oldSrc;
|
|
}
|
|
|
|
void SourceScaler::setSource(const byte *src, uint pitch, int width, int height, int padding) {
|
|
if (_oldSrc != NULL)
|
|
delete[] _oldSrc;
|
|
|
|
_padding = padding;
|
|
// Give _oldSrc same pitch
|
|
int size = (height + padding * 2) * pitch;
|
|
_oldSrc = new byte[size];
|
|
memset(_oldSrc, 0, size);
|
|
}
|
|
|
|
void SourceScaler::scale(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr,
|
|
uint32 dstPitch, int width, int height, int x, int y) {
|
|
if (!_enable) {
|
|
// Do not pass _oldSrc, do not update _oldSrc
|
|
internScale(srcPtr, srcPitch,
|
|
dstPtr, dstPitch,
|
|
NULL, 0,
|
|
width, height);
|
|
return;
|
|
}
|
|
int offset = (_padding + x) * _format.bytesPerPixel + (_padding + y) * srcPitch;
|
|
// Call user defined scale function
|
|
internScale(srcPtr, srcPitch,
|
|
dstPtr, dstPitch,
|
|
_oldSrc + offset, srcPitch,
|
|
width, height);
|
|
// Update old src
|
|
byte *oldSrc = _oldSrc + offset;
|
|
while (height--) {
|
|
memcpy(oldSrc, srcPtr, width * _format.bytesPerPixel);
|
|
oldSrc += srcPitch;
|
|
srcPtr += srcPitch;
|
|
}
|
|
}
|
|
|