mirror of
https://github.com/libretro/scummvm.git
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136 lines
3.5 KiB
C++
136 lines
3.5 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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (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, see <http://www.gnu.org/licenses/>.
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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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_autoFree = true;
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}
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Image::~Image() {
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if (_autoFree)
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delete[] _imageData;
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}
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void Image::setData(byte *d, bool autoFree) {
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if (_autoFree)
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delete[] _imageData;
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_imageData = d;
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_autoFree = autoFree;
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}
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void Image::blitBitmap(uint16 srcX, uint16 srcY, Image *imgDest,
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uint16 destX, uint16 destY, uint16 width, uint16 height, byte masked) {
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int clipWidth = width;
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int clipHeight = height;
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int destWidth = (imgDest) ? imgDest->_width : _vm->_graphics->_screenWidth;
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int destHeight = (imgDest) ? imgDest->_height : _vm->_graphics->_screenHeight;
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byte *destBuffer = (imgDest) ? imgDest->_imageData : _vm->_graphics->getCurrentDrawingBuffer();
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if (destX + clipWidth > destWidth)
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clipWidth = destWidth - destX;
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if (destY + clipHeight > destHeight)
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clipHeight = destHeight - destY;
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if ((clipWidth > 0) && (clipHeight > 0)) {
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byte *img = _imageData + srcY * _width + srcX;
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byte *dest = destBuffer + destY * destWidth + destX;
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if (!masked) {
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for (int i = 0; i < clipHeight; i++) {
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memcpy(dest, img, clipWidth);
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img += _width;
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dest += destWidth;
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}
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} else {
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for (int i = 0; i < clipHeight; i++) {
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for (int j = 0; j < clipWidth; j++) {
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byte c = img[j];
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if (c)
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dest[j] = c - 1;
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}
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img += _width;
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dest += 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 clipWidth = _width;
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int clipHeight = _height;
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if (x + clipWidth > _vm->_graphics->_screenWidth)
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clipWidth = _vm->_graphics->_screenWidth - x;
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if (y + clipHeight > _vm->_graphics->_screenHeight)
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clipHeight = _vm->_graphics->_screenHeight - y;
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if ((clipWidth > 0) && (clipHeight > 0)) {
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byte *img = _imageData;
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byte *screen = _vm->_graphics->getCurrentDrawingBuffer() + y * _vm->_graphics->_screenWidth + x;
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while (clipHeight-- > 0) {
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memcpy(img, screen, clipWidth);
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img += _width;
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screen += _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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