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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.
*
* $URL$
* $Id$
*
*/
#include "common/timer.h"
#include "common/util.h"
#include "sci/sci.h"
#include "sci/engine/state.h"
#include "sci/tools.h"
#include "sci/gui/gui_screen.h"
namespace Sci {
SciGuiScreen::SciGuiScreen(OSystem *system, int16 width, int16 height, int16 scaleFactor) :
_system(system), _width(width), _height(height) {
int i;
uint16 base = 0;
_pixels = _width * _height;
// if you want to do scaling, adjust putPixel() accordingly
_displayWidth = _width * scaleFactor;
_displayHeight = _height * scaleFactor;
_displayPixels = _displayWidth * _displayHeight;
_visualScreen = initScreen(_pixels);
_priorityScreen = initScreen(_pixels);
_controlScreen = initScreen(_pixels);
_displayScreen = initScreen(_displayPixels);
for (i = 0; i < _height; i++) {
_baseTable[i] = base; _baseDisplayTable[i] = base;
base += _width;
}
}
SciGuiScreen::~SciGuiScreen() {
free(_visualScreen);
free(_priorityScreen);
free(_controlScreen);
free(_displayScreen);
}
byte *SciGuiScreen::initScreen(uint16 pixelCount) {
byte *screen = (byte *)malloc(pixelCount);
memset(screen, 0, pixelCount);
return screen;
}
void SciGuiScreen::copyToScreen() {
_system->copyRectToScreen(_displayScreen, _displayWidth, 0, 0, _displayWidth, _displayHeight);
}
byte SciGuiScreen::getDrawingMask(byte color, byte prio, byte control) {
byte flag = 0;
if (color != 255)
flag |= SCI_SCREEN_MASK_VISUAL;
if (prio != 255)
flag |= SCI_SCREEN_MASK_PRIORITY;
if (control != 255)
flag |= SCI_SCREEN_MASK_CONTROL;
return flag;
}
void SciGuiScreen::putPixel(int x, int y, byte drawMask, byte color, byte priority, byte control) {
int offset = _baseTable[y] + x;
if (drawMask & SCI_SCREEN_MASK_VISUAL) {
*(_visualScreen + offset) = color;
_displayScreen[_baseDisplayTable[y] + x] = color;
}
if (drawMask & SCI_SCREEN_MASK_PRIORITY)
*(_priorityScreen + offset) = priority;
if (drawMask & SCI_SCREEN_MASK_CONTROL)
*(_controlScreen + offset) = control;
}
byte SciGuiScreen::getVisual(int x, int y) {
return _visualScreen[_baseTable[y] + x];
}
byte SciGuiScreen::getPriority(int x, int y) {
return _priorityScreen[_baseTable[y] + x];
}
byte SciGuiScreen::getControl(int x, int y) {
return _controlScreen[_baseTable[y] + x];
}
byte SciGuiScreen::isFillMatch(int16 x, int16 y, byte flag, byte t_color, byte t_pri, byte t_con) {
int offset = _baseTable[y] + x;
byte match = 0;
if (flag & SCI_SCREEN_MASK_VISUAL && *(_visualScreen + offset) == t_color)
match |= SCI_SCREEN_MASK_VISUAL;
if (flag & SCI_SCREEN_MASK_PRIORITY && *(_priorityScreen + offset) == t_pri)
match |= SCI_SCREEN_MASK_PRIORITY;
if (flag & SCI_SCREEN_MASK_CONTROL && *(_controlScreen + offset) == t_con)
match |= SCI_SCREEN_MASK_CONTROL;
return match;
}
int SciGuiScreen::getBitsDataSize(Common::Rect rect, byte mask) {
int byteCount = sizeof(rect) + sizeof(mask);
int pixels = rect.width() * rect.height();
if (mask & SCI_SCREEN_MASK_VISUAL) {
byteCount += pixels; // _visualScreen
byteCount += pixels; // _displayScreen
}
if (mask & SCI_SCREEN_MASK_PRIORITY) {
byteCount += pixels; // _priorityScreen
}
if (mask & SCI_SCREEN_MASK_CONTROL) {
byteCount += pixels; // _controlScreen
}
return byteCount;
}
void SciGuiScreen::saveBits(Common::Rect rect, byte mask, byte *memoryPtr) {
memcpy(memoryPtr, (void *)&rect, sizeof(rect)); memoryPtr += sizeof(rect);
memcpy(memoryPtr, (void *)&mask, sizeof(mask)); memoryPtr += sizeof(mask);
if (mask & SCI_SCREEN_MASK_VISUAL) {
saveBitsScreen(rect, _visualScreen, memoryPtr);
saveBitsScreen(rect, _displayScreen, memoryPtr);
}
if (mask & SCI_SCREEN_MASK_PRIORITY) {
saveBitsScreen(rect, _priorityScreen, memoryPtr);
}
if (mask & SCI_SCREEN_MASK_CONTROL) {
saveBitsScreen(rect, _controlScreen, memoryPtr);
}
}
void SciGuiScreen::saveBitsScreen(Common::Rect rect, byte *screen, byte *&memoryPtr) {
int width = rect.width();
int y;
screen += (rect.top * _width) + rect.left;
for (y = rect.top; y < rect.bottom; y++) {
memcpy(memoryPtr, (void*)screen, width); memoryPtr += width;
screen += _width;
}
}
void SciGuiScreen::restoreBits(byte *memoryPtr) {
Common::Rect rect;
byte mask;
memcpy((void *)&rect, memoryPtr, sizeof(rect)); memoryPtr += sizeof(rect);
memcpy((void *)&mask, memoryPtr, sizeof(mask)); memoryPtr += sizeof(mask);
if (mask & SCI_SCREEN_MASK_VISUAL) {
restoreBitsScreen(rect, memoryPtr, _visualScreen);
restoreBitsScreen(rect, memoryPtr, _displayScreen);
}
if (mask & SCI_SCREEN_MASK_PRIORITY) {
restoreBitsScreen(rect, memoryPtr, _priorityScreen);
}
if (mask & SCI_SCREEN_MASK_CONTROL) {
restoreBitsScreen(rect, memoryPtr, _controlScreen);
}
}
void SciGuiScreen::restoreBitsScreen(Common::Rect rect, byte *&memoryPtr, byte *screen) {
int width = rect.width();
int y;
screen += (rect.top * _width) + rect.left;
for (y = rect.top; y < rect.bottom; y++) {
memcpy((void*) screen, memoryPtr, width); memoryPtr += width;
screen += _width;
}
}
// Currently not really done, its supposed to be possible to only dither _visualScreen
void SciGuiScreen::dither() {
int y, x;
byte color;
byte *screenPtr = _visualScreen;
byte *displayPtr = _displayScreen;
for (y = 0; y < _height; y++) {
for (x = 0; x < _width; x++) {
color = *screenPtr;
if (color & 0xF0) {
color ^= color << 4;
color = ((x^y) & 1) ? color >> 4 : color & 0x0F;
*screenPtr = color; *displayPtr = color;
}
screenPtr++; displayPtr++;
}
}
}
} // End of namespace Sci
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