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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.
*
*/
/*
* This code is based on Labyrinth of Time code with assistance of
*
* Copyright (c) 1993 Terra Nova Development
* Copyright (c) 2004 The Wyrmkeep Entertainment Co.
*
*/
#include "lab/lab.h"
#include "lab/image.h"
namespace Lab {
/**
* Reads in an image from disk.
*/
Image::Image(Common::File *s) {
_width = s->readUint16LE();
_height = s->readUint16LE();
s->skip(4);
uint32 size = _width * _height;
if (size & 1)
size++;
_imageData = new byte[size]; // FIXME: Memory leak!
s->read(_imageData, size);
}
/**
* Blits a piece of one image to another.
*/
void Image::blitBitmap(uint16 xs, uint16 ys, Image *imDest,
uint16 xd, uint16 yd, uint16 width, uint16 height, byte masked) {
int w = width;
int h = height;
int destWidth = (imDest) ? imDest->_width : g_lab->_graphics->_screenWidth;
int destHeight = (imDest) ? imDest->_height : g_lab->_graphics->_screenHeight;
byte *destBuffer = (imDest) ? imDest->_imageData : g_lab->_graphics->getCurrentDrawingBuffer();
if (xd + w > destWidth)
w = destWidth - xd;
if (yd + h > destHeight)
h = destHeight - yd;
if (w > 0 && h > 0) {
byte *s = _imageData + ys * _width + xs;
byte *d = destBuffer + yd * destWidth + xd;
if (!masked) {
while (h-- > 0) {
memcpy(d, s, w);
s += _width;
d += destWidth;
}
} else {
while (h-- > 0) {
byte *ss = s;
byte *dd = d;
int ww = w;
while (ww-- > 0) {
byte c = *ss++;
if (c) *dd++ = c - 1;
else dd++;
}
s += _width;
d += destWidth;
}
}
}
}
/**
* Draws an image to the screen.
*/
void Image::drawImage(uint16 x, uint16 y) {
blitBitmap(0, 0, NULL, x, y, _width, _height, false);
}
/**
* Draws an image to the screen with transparency.
*/
void Image::drawMaskImage(uint16 x, uint16 y) {
blitBitmap(0, 0, NULL, x, y, _width, _height, true);
}
/**
* Reads an image from the screen.
*/
void Image::readScreenImage(uint16 x, uint16 y) {
int w = _width;
int h = _height;
if (x + w > g_lab->_graphics->_screenWidth)
w = g_lab->_graphics->_screenWidth - x;
if (y + h > g_lab->_graphics->_screenHeight)
h = g_lab->_graphics->_screenHeight - y;
if ((w > 0) && (h > 0)) {
byte *s = _imageData;
byte *d = g_lab->_graphics->getCurrentDrawingBuffer() + y * g_lab->_graphics->_screenWidth + x;
while (h-- > 0) {
memcpy(s, d, w);
s += _width;
d += g_lab->_graphics->_screenWidth;
}
}
}
} // End of namespace Lab
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