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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/debug.h"
#include "common/stream.h"
#include "graphics/surface.h"
#include "sludge/colours.h"
#include "sludge/hsi.h"
#include "sludge/sludge.h"
namespace Sludge {
HSIDecoder::HSIDecoder() : _surface(nullptr), _reserve(-1) {
}
HSIDecoder::~HSIDecoder() {
destroy();
}
void HSIDecoder::destroy() {
if (_surface != nullptr) {
_surface->free();
delete _surface;
_surface = nullptr;
}
}
bool HSIDecoder::loadStream(Common::SeekableReadStream &stream) {
destroy();
int32_t transCol = _reserve > 0 ? -1 : 63519;
int n;
uint16 width = stream.readUint16BE();
debug(kSludgeDebugGraphics, "picWidth : %i", width);
uint16 height = stream.readUint16BE();
debug(kSludgeDebugGraphics, "picHeight : %i", height);
_surface = new Graphics::Surface();
_surface->create(width, height, Graphics::PixelFormat(4, 8, 8, 8, 8, 24, 16, 8, 0));
for (uint16 y = 0; y < height; y++) {
uint16 x = 0;
while (x < width) {
uint16 c = stream.readUint16BE();
if (c & 32) {
n = stream.readByte() + 1;
c -= 32;
} else {
n = 1;
}
while (n--) {
byte *target = (byte *)_surface->getBasePtr(x, y);
if (_reserve != -1 && (c == transCol || c == 2015)) {
target[0] = (byte)0;
target[1] = (byte)0;
target[2] = (byte)0;
target[3] = (byte)0;
} else {
target[0] = (byte)255;
target[1] = (byte)blueValue(c);
target[2] = (byte)greenValue(c);
target[3] = (byte)redValue(c);
}
x++;
}
}
}
return true;
}
} // End of namespace Sludge
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