mirror of
https://github.com/libretro/scummvm.git
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134 lines
3.2 KiB
C++
134 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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*
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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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/*
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* This code is based on Labyrinth of Time code with assistance of
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*
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* Copyright (c) 1993 Terra Nova Development
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* Copyright (c) 2004 The Wyrmkeep Entertainment Co.
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*
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*/
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#include "common/file.h"
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#include "lab/lab.h"
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#include "lab/dispman.h"
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#include "lab/image.h"
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namespace Lab {
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Image::Image(Common::File *s, LabEngine *vm) : _vm(vm) {
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_width = s->readUint16LE();
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_height = s->readUint16LE();
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s->skip(4);
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uint32 size = _width * _height;
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if (size & 1)
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size++;
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_imageData = new byte[size];
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s->read(_imageData, size);
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}
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Image::~Image() {
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delete[] _imageData;
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}
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void Image::blitBitmap(uint16 xs, uint16 ys, Image *imDest,
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uint16 xd, uint16 yd, uint16 width, uint16 height, byte masked) {
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int w = width;
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int h = height;
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int destWidth = (imDest) ? imDest->_width : _vm->_graphics->_screenWidth;
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int destHeight = (imDest) ? imDest->_height : _vm->_graphics->_screenHeight;
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byte *destBuffer = (imDest) ? imDest->_imageData : _vm->_graphics->getCurrentDrawingBuffer();
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if (xd + w > destWidth)
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w = destWidth - xd;
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if (yd + h > destHeight)
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h = destHeight - yd;
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if ((w > 0) && (h > 0)) {
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byte *s = _imageData + ys * _width + xs;
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byte *d = destBuffer + yd * destWidth + xd;
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if (!masked) {
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while (h-- > 0) {
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memcpy(d, s, w);
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s += _width;
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d += destWidth;
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}
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} else {
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while (h-- > 0) {
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byte *ss = s;
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byte *dd = d;
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int ww = w;
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while (ww-- > 0) {
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byte c = *ss++;
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if (c)
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*dd++ = c - 1;
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else
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dd++;
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}
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s += _width;
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d += destWidth;
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}
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}
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}
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}
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void Image::drawImage(uint16 x, uint16 y) {
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blitBitmap(0, 0, nullptr, x, y, _width, _height, false);
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}
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void Image::drawMaskImage(uint16 x, uint16 y) {
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blitBitmap(0, 0, nullptr, x, y, _width, _height, true);
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}
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void Image::readScreenImage(uint16 x, uint16 y) {
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int w = _width;
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int h = _height;
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if (x + w > _vm->_graphics->_screenWidth)
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w = _vm->_graphics->_screenWidth - x;
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if (y + h > _vm->_graphics->_screenHeight)
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h = _vm->_graphics->_screenHeight - y;
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if ((w > 0) && (h > 0)) {
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byte *s = _imageData;
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byte *d = _vm->_graphics->getCurrentDrawingBuffer() + y * _vm->_graphics->_screenWidth + x;
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while (h-- > 0) {
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memcpy(s, d, w);
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s += _width;
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d += _vm->_graphics->_screenWidth;
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}
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}
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}
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} // End of namespace Lab
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