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