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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 "graphics/palette.h"
#include "common/events.h"
#include "lab/lab.h"
#include "lab/image.h"
namespace Lab {
/*****************************************************************************/
/* Sets the current page on the VGA card. */
/*****************************************************************************/
void LabEngine::changeVolume(int delta) {
warning("STUB: changeVolume()");
}
void LabEngine::waitTOF() {
g_system->copyRectToScreen(_displayBuffer, _screenWidth, 0, 0, _screenWidth, _screenHeight);
g_system->updateScreen();
_event->processInput();
uint32 now;
for (now = g_system->getMillis(); now - _lastWaitTOFTicks <= 0xF; now = g_system->getMillis() )
g_system->delayMillis(_lastWaitTOFTicks - now + 17);
_lastWaitTOFTicks = now;
}
/*****************************************************************************/
/* Writes any number of the 256 color registers. */
/* first: the number of the first color register to write. */
/* numreg: the number of registers to write */
/* buf: a char pointer which contains the selected color registers. */
/* Each value representing a color register occupies 3 bytes in */
/* the array. The order is red, green then blue. The first byte */
/* in the array is the red component of the first element selected.*/
/* The length of the buffer is 3 times the number of registers */
/* selected. */
/*****************************************************************************/
void LabEngine::writeColorRegs(byte *buf, uint16 first, uint16 numreg) {
byte tmp[256 * 3];
for (int i = 0; i < 256 * 3; i++) {
tmp[i] = buf[i] * 4;
}
g_system->getPaletteManager()->setPalette(tmp, first, numreg);
memcpy(&(_curvgapal[first * 3]), buf, numreg * 3);
}
void LabEngine::setPalette(void *cmap, uint16 numcolors) {
if (memcmp(cmap, _curvgapal, numcolors * 3) != 0)
writeColorRegs((byte *)cmap, 0, numcolors);
}
/*****************************************************************************/
/* Returns the base address of the current VGA display. */
/*****************************************************************************/
byte *LabEngine::getCurrentDrawingBuffer() {
if (_currentDisplayBuffer)
return _currentDisplayBuffer;
return _displayBuffer;
}
/*****************************************************************************/
/* Scrolls the display in the x direction by blitting. */
/* The _tempScrollData variable must be initialized to some memory, or this */
/* function will fail. */
/*****************************************************************************/
void LabEngine::scrollDisplayX(int16 dx, uint16 x1, uint16 y1, uint16 x2, uint16 y2) {
Image im;
uint16 temp;
im._imageData = _tempScrollData;
if (x1 > x2) {
temp = x2;
x2 = x1;
x1 = temp;
}
if (y1 > y2) {
temp = y2;
y2 = y1;
y1 = temp;
}
im._width = x2 - x1 + 1 - dx;
im._height = y2 - y1 + 1;
im.readScreenImage(x1, y1);
im.drawImage(x1 + dx, y1);
_graphics->setAPen(0);
_graphics->rectFill(x1, y1, x1 + dx - 1, y2);
}
/*****************************************************************************/
/* Scrolls the display in the y direction by blitting. */
/*****************************************************************************/
void LabEngine::scrollDisplayY(int16 dy, uint16 x1, uint16 y1, uint16 x2, uint16 y2) {
Image im;
uint16 temp;
im._imageData = _tempScrollData;
if (x1 > x2) {
temp = x2;
x2 = x1;
x1 = temp;
}
if (y1 > y2) {
temp = y2;
y2 = y1;
y1 = temp;
}
im._width = x2 - x1 + 1;
im._height = y2 - y1 + 1 - dy;
im.readScreenImage(x1, y1);
im.drawImage(x1, y1 + dy);
_graphics->setAPen(0);
_graphics->rectFill(x1, y1, x2, y1 + dy - 1);
}
/*****************************************************************************/
/* Overlays a region on the screen using the desired pen color. */
/*****************************************************************************/
void LabEngine::overlayRect(uint16 pencolor, uint16 x1, uint16 y1, uint16 x2, uint16 y2) {
int w = x2 - x1 + 1;
int h = y2 - y1 + 1;
if (x1 + w > _screenWidth)
w = _screenWidth - x1;
if (y1 + h > _screenHeight)
h = _screenHeight - y1;
if ((w > 0) && (h > 0)) {
char *d = (char *)getCurrentDrawingBuffer() + y1 * _screenWidth + x1;
while (h-- > 0) {
char *dd = d;
int ww = w;
if (y1 & 1) {
dd++;
ww--;
}
while (ww > 0) {
*dd = pencolor;
dd += 2;
ww -= 2;
}
d += _screenWidth;
y1++;
}
}
}
} // End of namespace Lab
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