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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 "lure/screen.h"
#include "lure/luredefs.h"
#include "lure/memory.h"
#include "lure/disk.h"
#include "lure/decode.h"
#include "lure/events.h"
namespace Lure {
static Screen *int_disk = NULL;
Screen &Screen::getReference() {
return *int_disk;
}
Screen::Screen(OSystem &system): _system(system),
_screen(new Surface(FULL_SCREEN_WIDTH, FULL_SCREEN_HEIGHT)),
_disk(Disk::getReference()),
_palette(new Palette(GAME_PALETTE_RESOURCE_ID)) {
int_disk = this;
_screen->empty();
_system.setPalette(_palette->data(), 0, GAME_COLOURS);
}
Screen::~Screen() {
delete _screen;
delete _palette;
}
// setPaletteEmpty
// Defaults the palette to an empty set
void Screen::setPaletteEmpty() {
delete _palette;
_palette = new Palette();
_system.setPalette(_palette->data(), 0, GAME_COLOURS);
_system.updateScreen();
}
// setPalette
// Sets the current palette to the passed palette
void Screen::setPalette(Palette *p) {
_palette->copyFrom(p);
_system.setPalette(_palette->data(), 0, GAME_COLOURS);
_system.updateScreen();
}
// setPalette
// Variation that allows the specification of a subset of a palette passed in to be copied
void Screen::setPalette(Palette *p, uint16 start, uint16 num) {
_palette->palette()->copyFrom(p->palette(), start * PALETTE_FADE_INC_SIZE,
start * PALETTE_FADE_INC_SIZE, num * PALETTE_FADE_INC_SIZE);
_system.setPalette(_palette->data(), 0, GAME_COLOURS);
_system.updateScreen();
}
// paletteFadeIn
// Fades in the palette. For proper operation, the palette should have been
// previously set to empty
void Screen::paletteFadeIn(Palette *p) {
assert(p->numEntries() <= _palette->numEntries());
Events &events = Events::getReference();
bool changed;
do {
changed = false;
byte *pFinal = p->data();
byte *pCurrent = _palette->data();
for (int palCtr = 0; palCtr < p->numEntries() * PALETTE_FADE_INC_SIZE; ++palCtr, ++pCurrent, ++pFinal)
{
if (palCtr % PALETTE_FADE_INC_SIZE == (PALETTE_FADE_INC_SIZE - 1)) continue;
bool isDifferent = *pCurrent < *pFinal;
if (isDifferent) {
if ((*pFinal - *pCurrent) < PALETTE_FADE_INC_SIZE)
*pCurrent = *pFinal;
else
*pCurrent += PALETTE_FADE_INC_SIZE;
changed = true;
}
}
if (changed) {
_system.setPalette(_palette->data(), 0, GAME_COLOURS);
_system.updateScreen();
_system.delayMillis(20);
events.pollEvent();
}
} while (changed);
}
// paletteFadeOut
// Fades the screen to black by gradually decreasing the palette colours
void Screen::paletteFadeOut(int numEntries) {
assert((uint32)numEntries <= _palette->palette()->size());
Events &events = Events::getReference();
bool changed;
do {
byte *pTemp = _palette->data();
changed = false;
for (uint32 palCtr = 0; palCtr < (uint32)(numEntries * PALETTE_FADE_INC_SIZE); ++palCtr, ++pTemp) {
if (palCtr % PALETTE_FADE_INC_SIZE == (PALETTE_FADE_INC_SIZE - 1))
continue;
bool isDifferent = *pTemp > 0;
if (isDifferent) {
if (*pTemp < PALETTE_FADE_INC_SIZE) *pTemp = 0;
else *pTemp -= PALETTE_FADE_INC_SIZE;
changed = true;
}
}
if (changed) {
_system.setPalette(_palette->data(), 0, GAME_COLOURS);
_system.updateScreen();
_system.delayMillis(20);
events.pollEvent();
}
} while (changed);
}
void Screen::resetPalette() {
Palette p(GAME_PALETTE_RESOURCE_ID);
setPalette(&p);
}
void Screen::empty() {
_screen->empty();
update();
}
void Screen::update() {
_system.copyRectToScreen(screen_raw(), FULL_SCREEN_WIDTH, 0, 0, FULL_SCREEN_WIDTH, FULL_SCREEN_HEIGHT);
_system.updateScreen();
}
void Screen::updateArea(uint16 x, uint16 y, uint16 w, uint16 h) {
_system.copyRectToScreen(screen_raw(), FULL_SCREEN_WIDTH, x, y, w, h);
_system.updateScreen();
}
} // end of namespace Lure
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