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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.
*
*/
#include "mohawk/resource.h"
#include "mohawk/riven.h"
#include "mohawk/riven_card.h"
#include "mohawk/riven_graphics.h"
#include "mohawk/riven_sound.h"
#include "mohawk/riven_stack.h"
#include "common/system.h"
#include "engines/util.h"
#include "graphics/colormasks.h"
namespace Mohawk {
class TransitionEffect {
public:
TransitionEffect(OSystem *system, Graphics::Surface *mainScreen, Graphics::Surface *effectScreen,
RivenTransition type, uint duration, const Common::Rect &rect) :
_system(system),
_mainScreen(mainScreen),
_effectScreen(effectScreen),
_type(type),
_duration(duration),
_timeBased(false),
_rect(rect) {
}
virtual ~TransitionEffect() {}
bool isTimeBased() const { return _timeBased; }
virtual void drawFrame(uint32 elapsed) = 0;
protected:
Common::Rect makeDirectionalInitalArea() const {
Common::Rect initialArea = _rect;
switch (_type) {
case kRivenTransitionWipeLeft:
case kRivenTransitionPanLeft:
initialArea.left = _rect.right;
break;
case kRivenTransitionWipeRight:
case kRivenTransitionPanRight:
initialArea.right = _rect.left;
break;
case kRivenTransitionWipeUp:
case kRivenTransitionPanUp:
initialArea.top = _rect.bottom;
break;
case kRivenTransitionWipeDown:
case kRivenTransitionPanDown:
initialArea.bottom = _rect.top;
break;
default:
error("Unhandled transition type: %d", _type);
}
return initialArea;
}
OSystem *_system;
RivenTransition _type;
uint _duration;
Common::Rect _rect;
bool _timeBased;
Graphics::Surface *_mainScreen;
Graphics::Surface *_effectScreen;
};
class TransitionEffectWipe : public TransitionEffect {
public:
TransitionEffectWipe(OSystem *system, Graphics::Surface *mainScreen, Graphics::Surface *effectScreen,
RivenTransition type, uint duration, const Common::Rect &rect) :
TransitionEffect(system, mainScreen, effectScreen, type, duration, rect) {
_timeBased = true;
_lastCopyArea = makeDirectionalInitalArea();
}
virtual void drawFrame(uint32 elapsed) override {
Common::Rect copyArea;
switch (_type) {
case kRivenTransitionWipeLeft:
copyArea.top = _lastCopyArea.top;
copyArea.bottom = _lastCopyArea.bottom;
copyArea.right = _lastCopyArea.left;
copyArea.left = _rect.width() - elapsed * _rect.width() / _duration;
break;
case kRivenTransitionWipeRight:
copyArea.top = _lastCopyArea.top;
copyArea.bottom = _lastCopyArea.bottom;
copyArea.left = _lastCopyArea.right;
copyArea.right = elapsed * _rect.width() / _duration;
break;
case kRivenTransitionWipeUp:
copyArea.left = _lastCopyArea.left;
copyArea.right = _lastCopyArea.right;
copyArea.bottom = _lastCopyArea.top;
copyArea.top = _rect.height() - elapsed * _rect.height() / _duration;
break;
case kRivenTransitionWipeDown:
copyArea.left = _lastCopyArea.left;
copyArea.right = _lastCopyArea.right;
copyArea.top = _lastCopyArea.bottom;
copyArea.bottom = elapsed * _rect.height() / _duration;
break;
default:
error("Unhandled transition type: %d", _type);
}
_lastCopyArea = copyArea;
if (copyArea.isEmpty()) {
// Nothing to draw
return;
}
_effectScreen->copyRectToSurface(*_mainScreen, copyArea.left, copyArea.top, copyArea);
_system->copyRectToScreen(_effectScreen->getBasePtr(copyArea.left, copyArea.top), _effectScreen->pitch,
copyArea.left, copyArea.top, copyArea.width(), copyArea.height());
}
private:
Common::Rect _lastCopyArea;
};
class TransitionEffectPan : public TransitionEffect {
public:
TransitionEffectPan(OSystem *system, Graphics::Surface *mainScreen, Graphics::Surface *effectScreen,
RivenTransition type, uint duration, const Common::Rect &rect) :
TransitionEffect(system, mainScreen, effectScreen, type, duration, rect) {
_timeBased = true;
_initialArea = makeDirectionalInitalArea();
}
virtual void drawFrame(uint32 elapsed) override {
Common::Rect newArea;
switch (_type) {
case kRivenTransitionPanLeft:
newArea.top = _initialArea.top;
newArea.bottom = _initialArea.bottom;
newArea.right = _initialArea.right;
newArea.left = _rect.width() - elapsed * _rect.width() / _duration;
break;
case kRivenTransitionPanRight:
newArea.top = _initialArea.top;
newArea.bottom = _initialArea.bottom;
newArea.left = _initialArea.left;
newArea.right = elapsed * _rect.width() / _duration;
break;
case kRivenTransitionPanUp:
newArea.left = _initialArea.left;
newArea.right = _initialArea.right;
newArea.bottom = _initialArea.bottom;
newArea.top = _rect.height() - elapsed * _rect.height() / _duration;
break;
case kRivenTransitionPanDown:
newArea.left = _initialArea.left;
newArea.right = _initialArea.right;
newArea.top = _initialArea.top;
newArea.bottom = elapsed * _rect.height() / _duration;
break;
default:
error("Unhandled transition type: %d", _type);
}
if (newArea.isEmpty()) {
// Nothing to draw
return;
}
Common::Rect oldArea = Common::Rect(
newArea.right != _rect.right ? _rect.left + newArea.width() : _rect.left,
newArea.bottom != _rect.bottom ? _rect.top + newArea.height() : _rect.top,
newArea.left != _rect.left ? _rect.right - newArea.width() : _rect.right,
newArea.top != _rect.top ? _rect.bottom - newArea.height() : _rect.bottom
);
int oldX = newArea.left != _rect.left ? _rect.left + newArea.width() : _rect.left;
int oldY = newArea.top != _rect.top ? _rect.top + newArea.height() : _rect.top;
_system->copyRectToScreen(_effectScreen->getBasePtr(oldX, oldY), _effectScreen->pitch,
oldArea.left, oldArea.top, oldArea.width(), oldArea.height());
int newX = newArea.right != _rect.right ? _rect.left + oldArea.width() : _rect.left;
int newY = newArea.bottom != _rect.bottom ? _rect.top + oldArea.height() : _rect.top;
_system->copyRectToScreen(_mainScreen->getBasePtr(newX, newY), _mainScreen->pitch,
newArea.left, newArea.top, newArea.width(), newArea.height());
if (newArea == _rect) {
_effectScreen->copyRectToSurface(*_mainScreen, _rect.left, _rect.top, _rect);
}
}
private:
Common::Rect _initialArea;
};
class TransitionEffectBlend : public TransitionEffect {
public:
TransitionEffectBlend(OSystem *system, Graphics::Surface *mainScreen, Graphics::Surface *effectScreen,
RivenTransition type, uint duration, const Common::Rect &rect) :
TransitionEffect(system, mainScreen, effectScreen, type, duration, rect) {
_timeBased = false;
}
virtual void drawFrame(uint32 elapsed) override {
assert(_effectScreen->format == _mainScreen->format);
assert(_effectScreen->format == _system->getScreenFormat());
if (elapsed == _duration) {
_effectScreen->copyRectToSurface(*_mainScreen, 0, 0, Common::Rect(_mainScreen->w, _mainScreen->h));
_system->copyRectToScreen(_effectScreen->getBasePtr(0, 0), _effectScreen->pitch, 0, 0, _effectScreen->w, _effectScreen->h);
} else {
Graphics::Surface *screen = _system->lockScreen();
uint alpha = elapsed * 255 / _duration;
for (uint y = 0; y < _mainScreen->h; y++) {
uint16 *src1 = (uint16 *) _mainScreen->getBasePtr(0, y);
uint16 *src2 = (uint16 *) _effectScreen->getBasePtr(0, y);
uint16 *dst = (uint16 *) screen->getBasePtr(0, y);
for (uint x = 0; x < _mainScreen->w; x++) {
uint8 r1, g1, b1, r2, g2, b2;
Graphics::colorToRGB< Graphics::ColorMasks<565> >(*src1++, r1, g1, b1);
Graphics::colorToRGB< Graphics::ColorMasks<565> >(*src2++, r2, g2, b2);
uint r = r1 * alpha + r2 * (255 - alpha);
uint g = g1 * alpha + g2 * (255 - alpha);
uint b = b1 * alpha + b2 * (255 - alpha);
r /= 255;
g /= 255;
b /= 255;
*dst++ = (uint16) Graphics::RGBToColor< Graphics::ColorMasks<565> >(r, g, b);
}
}
_system->unlockScreen();
}
}
};
RivenGraphics::RivenGraphics(MohawkEngine_Riven* vm) : GraphicsManager(), _vm(vm) {
_bitmapDecoder = new MohawkBitmap();
// Restrict ourselves to a single pixel format to simplify the effects implementation
_pixelFormat = Graphics::createPixelFormat<565>();
initGraphics(608, 436, true, &_pixelFormat);
// The actual game graphics only take up the first 392 rows. The inventory
// occupies the rest of the screen and we don't use the buffer to hold that.
_mainScreen = new Graphics::Surface();
_mainScreen->create(608, 392, _pixelFormat);
_effectScreen = new Graphics::Surface();
_effectScreen->create(608, 392, _pixelFormat);
_screenUpdateNesting = 0;
_screenUpdateRunning = false;
_scheduledTransition = kRivenTransitionNone;
_dirtyScreen = false;
_creditsImage = 302;
_creditsPos = 0;
_transitionMode = kRivenTransitionModeFastest;
_fliesEffect = nullptr;
}
RivenGraphics::~RivenGraphics() {
_effectScreen->free();
delete _effectScreen;
_mainScreen->free();
delete _mainScreen;
delete _bitmapDecoder;
delete _fliesEffect;
}
MohawkSurface *RivenGraphics::decodeImage(uint16 id) {
MohawkSurface *surface = _bitmapDecoder->decodeImage(_vm->getResource(ID_TBMP, id));
surface->convertToTrueColor();
return surface;
}
void RivenGraphics::copyImageToScreen(uint16 image, uint32 left, uint32 top, uint32 right, uint32 bottom) {
Graphics::Surface *surface = findImage(image)->getSurface();
beginScreenUpdate();
// Clip the width to fit on the screen. Fixes some images.
if (left + surface->w > 608)
surface->w = 608 - left;
for (uint16 i = 0; i < surface->h; i++)
memcpy(_mainScreen->getBasePtr(left, i + top), surface->getBasePtr(0, i), surface->w * surface->format.bytesPerPixel);
_dirtyScreen = true;
applyScreenUpdate();
}
void RivenGraphics::updateScreen(const Common::Rect &updateRect) {
if (_dirtyScreen) {
// Copy to screen if there's no transition. Otherwise transition. ;)
if (_scheduledTransition == kRivenTransitionNone
|| _transitionMode == kRivenTransitionModeDisabled) {
// mainScreen -> effectScreen -> systemScreen
_effectScreen->copyRectToSurface(*_mainScreen, updateRect.left, updateRect.top, updateRect);
_vm->_system->copyRectToScreen(_effectScreen->getBasePtr(updateRect.left, updateRect.top), _effectScreen->pitch, updateRect.left, updateRect.top, updateRect.width(), updateRect.height());
// Finally, update the screen.
_vm->_system->updateScreen();
_scheduledTransition = kRivenTransitionNone;
} else {
runScheduledTransition();
}
_dirtyScreen = false;
}
}
void RivenGraphics::scheduleWaterEffect(uint16 sfxeID) {
Common::SeekableReadStream *sfxeStream = _vm->getResource(ID_SFXE, sfxeID);
if (sfxeStream->readUint16BE() != 'SL')
error ("Unknown sfxe tag");
// Read in header info
SFXERecord sfxeRecord;
sfxeRecord.frameCount = sfxeStream->readUint16BE();
uint32 offsetTablePosition = sfxeStream->readUint32BE();
sfxeRecord.rect.left = sfxeStream->readUint16BE();
sfxeRecord.rect.top = sfxeStream->readUint16BE();
sfxeRecord.rect.right = sfxeStream->readUint16BE();
sfxeRecord.rect.bottom = sfxeStream->readUint16BE();
sfxeRecord.speed = sfxeStream->readUint16BE();
// Skip the rest of the fields...
// Read in offsets
sfxeStream->seek(offsetTablePosition);
uint32 *frameOffsets = new uint32[sfxeRecord.frameCount];
for (uint16 i = 0; i < sfxeRecord.frameCount; i++)
frameOffsets[i] = sfxeStream->readUint32BE();
sfxeStream->seek(frameOffsets[0]);
// Read in the scripts
for (uint16 i = 0; i < sfxeRecord.frameCount; i++)
sfxeRecord.frameScripts.push_back(sfxeStream->readStream((i == sfxeRecord.frameCount - 1) ? sfxeStream->size() - frameOffsets[i] : frameOffsets[i + 1] - frameOffsets[i]));
// Set it to the first frame
sfxeRecord.curFrame = 0;
sfxeRecord.lastFrameTime = 0;
delete[] frameOffsets;
delete sfxeStream;
_waterEffects.push_back(sfxeRecord);
}
void RivenGraphics::clearWaterEffects() {
_waterEffects.clear();
}
void RivenGraphics::runScheduledWaterEffects() {
// Don't run the effect if it's disabled
if (_vm->_vars["waterenabled"] == 0)
return;
Graphics::Surface *screen = NULL;
for (uint16 i = 0; i < _waterEffects.size(); i++) {
if (_vm->_system->getMillis() > _waterEffects[i].lastFrameTime + 1000 / _waterEffects[i].speed) {
// Lock the screen!
if (!screen)
screen = _vm->_system->lockScreen();
// Make sure the script is at the starting point
Common::SeekableReadStream *script = _waterEffects[i].frameScripts[_waterEffects[i].curFrame];
if (script->pos() != 0)
script->seek(0);
// Run script
uint16 curRow = 0;
for (uint16 op = script->readUint16BE(); op != 4; op = script->readUint16BE()) {
if (op == 1) { // Increment Row
curRow++;
} else if (op == 3) { // Copy Pixels
uint16 dstLeft = script->readUint16BE();
uint16 srcLeft = script->readUint16BE();
uint16 srcTop = script->readUint16BE();
uint16 rowWidth = script->readUint16BE();
memcpy ((byte *)screen->getBasePtr(dstLeft, curRow + _waterEffects[i].rect.top), (byte *)_mainScreen->getBasePtr(srcLeft, srcTop), rowWidth * _pixelFormat.bytesPerPixel);
} else if (op != 4) { // End of Script
error ("Unknown SFXE opcode %d", op);
}
}
// Increment frame
_waterEffects[i].curFrame++;
if (_waterEffects[i].curFrame == _waterEffects[i].frameCount)
_waterEffects[i].curFrame = 0;
// Set the new time
_waterEffects[i].lastFrameTime = _vm->_system->getMillis();
}
}
// Unlock the screen if it has been locked and return true to update the screen
if (screen) {
_vm->_system->unlockScreen();
}
}
void RivenGraphics::setTransitionMode(RivenTransitionMode mode) {
_transitionMode = mode;
switch (_transitionMode) {
case kRivenTransitionModeFastest:
_transitionFrames = 8;
_transitionDuration = 300;
break;
case kRivenTransitionModeNormal:
_transitionFrames = 16;
_transitionDuration = 500;
break;
case kRivenTransitionModeBest:
_transitionFrames = 32;
_transitionDuration = 700;
break;
case kRivenTransitionModeDisabled:
_transitionFrames = 0;
_transitionDuration = 0;
break;
default:
error("Unknown transition mode %d", _transitionMode);
}
}
void RivenGraphics::scheduleTransition(RivenTransition id, const Common::Rect &rect) {
_scheduledTransition = id;
_transitionRect = rect;
}
void RivenGraphics::runScheduledTransition() {
if (_scheduledTransition == kRivenTransitionNone)
return;
// Note: Transitions 0-11 are actual transitions, but none are used in-game.
// There's no point in implementing them if they're not used. These extra
// transitions were found by hacking scripts.
TransitionEffect *effect = nullptr;
switch (_scheduledTransition) {
case kRivenTransitionWipeLeft:
case kRivenTransitionWipeRight:
case kRivenTransitionWipeUp:
case kRivenTransitionWipeDown: {
effect = new TransitionEffectWipe(_vm->_system, _mainScreen, _effectScreen,
_scheduledTransition, _transitionDuration, _transitionRect);
break;
}
case kRivenTransitionPanLeft:
case kRivenTransitionPanRight:
case kRivenTransitionPanUp:
case kRivenTransitionPanDown: {
effect = new TransitionEffectPan(_vm->_system, _mainScreen, _effectScreen,
_scheduledTransition, _transitionDuration, _transitionRect);
break;
}
case kRivenTransitionBlend:
case kRivenTransitionBlend2: // (tspit CARD 155)
effect = new TransitionEffectBlend(_vm->_system, _mainScreen, _effectScreen,
_scheduledTransition, _transitionFrames, _transitionRect);
break;
default:
error("Unhandled transition type: %d", _scheduledTransition);
}
if (effect->isTimeBased()) {
uint32 startTime = _vm->_system->getMillis();
uint32 timeElapsed = 0;
while (timeElapsed < _transitionDuration && !_vm->shouldQuit()) {
effect->drawFrame(timeElapsed);
_vm->doFrame();
timeElapsed = _vm->_system->getMillis() - startTime;
}
effect->drawFrame(_transitionDuration);
} else {
for (uint frame = 1; frame <= _transitionFrames && !_vm->shouldQuit(); frame++) {
effect->drawFrame(frame);
_vm->doFrame();
}
}
delete effect;
_scheduledTransition = kRivenTransitionNone; // Clear scheduled transition
}
void RivenGraphics::clearMainScreen() {
_mainScreen->fillRect(Common::Rect(0, 0, 608, 392), _pixelFormat.RGBToColor(0, 0, 0));
}
void RivenGraphics::fadeToBlack() {
// The transition speed is forced to best here
setTransitionMode(kRivenTransitionModeBest);
scheduleTransition(kRivenTransitionBlend);
clearMainScreen();
runScheduledTransition();
}
void RivenGraphics::drawExtrasImageToScreen(uint16 id, const Common::Rect &rect) {
MohawkSurface *mhkSurface = _bitmapDecoder->decodeImage(_vm->getExtrasResource(ID_TBMP, id));
mhkSurface->convertToTrueColor();
Graphics::Surface *surface = mhkSurface->getSurface();
_vm->_system->copyRectToScreen(surface->getPixels(), surface->pitch, rect.left, rect.top, surface->w, surface->h);
delete mhkSurface;
}
void RivenGraphics::drawRect(const Common::Rect &rect, bool active) {
// Useful with debugging. Shows where hotspots are on the screen and whether or not they're active.
Graphics::Surface *screen = _vm->_system->lockScreen();
if (active)
screen->frameRect(rect, _pixelFormat.RGBToColor(0, 255, 0));
else
screen->frameRect(rect, _pixelFormat.RGBToColor(255, 0, 0));
_vm->_system->unlockScreen();
}
void RivenGraphics::drawImageRect(uint16 id, const Common::Rect &srcRect, const Common::Rect &dstRect) {
// Draw tBMP id from srcRect to dstRect
Graphics::Surface *surface = findImage(id)->getSurface();
assert(srcRect.width() == dstRect.width() && srcRect.height() == dstRect.height());
for (uint16 i = 0; i < srcRect.height(); i++)
memcpy(_mainScreen->getBasePtr(dstRect.left, i + dstRect.top), surface->getBasePtr(srcRect.left, i + srcRect.top), srcRect.width() * surface->format.bytesPerPixel);
_dirtyScreen = true;
}
void RivenGraphics::drawExtrasImage(uint16 id, const Common::Rect &dstRect) {
MohawkSurface *mhkSurface = _bitmapDecoder->decodeImage(_vm->getExtrasResource(ID_TBMP, id));
mhkSurface->convertToTrueColor();
Graphics::Surface *surface = mhkSurface->getSurface();
assert(dstRect.width() == surface->w);
for (uint16 i = 0; i < surface->h; i++)
memcpy(_mainScreen->getBasePtr(dstRect.left, i + dstRect.top), surface->getBasePtr(0, i), surface->pitch);
delete mhkSurface;
_dirtyScreen = true;
}
void RivenGraphics::beginCredits() {
// Clear the old cache
clearCache();
// Now cache all the credits images
for (uint16 i = 302; i <= 320; i++) {
MohawkSurface *surface = _bitmapDecoder->decodeImage(_vm->getExtrasResource(ID_TBMP, i));
surface->convertToTrueColor();
addImageToCache(i, surface);
}
// And clear our screen too
clearMainScreen();
}
void RivenGraphics::updateCredits() {
if ((_creditsImage == 303 || _creditsImage == 304) && _creditsPos == 0)
fadeToBlack();
if (_creditsImage < 304) {
// For the first two credit images, they are faded from black to the image and then out again
scheduleTransition(kRivenTransitionBlend);
Graphics::Surface *frame = findImage(_creditsImage++)->getSurface();
for (int y = 0; y < frame->h; y++)
memcpy(_mainScreen->getBasePtr(124, y), frame->getBasePtr(0, y), frame->pitch);
runScheduledTransition();
} else {
// Otheriwse, we're scrolling
// Move the screen up one row
memmove(_mainScreen->getPixels(), _mainScreen->getBasePtr(0, 1), _mainScreen->pitch * (_mainScreen->h - 1));
// Only update as long as we're not before the last frame
// Otherwise, we're just moving up a row (which we already did)
if (_creditsImage <= 320) {
// Copy the next row to the bottom of the screen
Graphics::Surface *frame = findImage(_creditsImage)->getSurface();
memcpy(_mainScreen->getBasePtr(124, _mainScreen->h - 1), frame->getBasePtr(0, _creditsPos), frame->pitch);
_creditsPos++;
if (_creditsPos == _mainScreen->h) {
_creditsImage++;
_creditsPos = 0;
}
}
// Now flush the new screen
_vm->_system->copyRectToScreen(_mainScreen->getPixels(), _mainScreen->pitch, 0, 0, _mainScreen->w, _mainScreen->h);
_vm->_system->updateScreen();
}
}
void RivenGraphics::beginScreenUpdate() {
_screenUpdateNesting++;
}
void RivenGraphics::applyScreenUpdate(bool force) {
if (force) {
_screenUpdateNesting = 0;
} else {
_screenUpdateNesting--;
}
// The screen is only updated when the outermost screen update ends
if (_screenUpdateNesting <= 0 && !_screenUpdateRunning) {
_screenUpdateRunning = true;
_vm->getCard()->runScript(kCardUpdateScript);
_vm->_sound->triggerDrawSound();
updateScreen();
_screenUpdateNesting = 0;
_screenUpdateRunning = false;
}
}
void RivenGraphics::setFliesEffect(uint16 count, bool fireflies) {
delete _fliesEffect;
_fliesEffect = new FliesEffect(_vm, count, fireflies);
}
void RivenGraphics::clearFliesEffect() {
delete _fliesEffect;
_fliesEffect = nullptr;
}
void RivenGraphics::runFliesEffect() {
if (_fliesEffect) {
_fliesEffect->update();
}
}
Graphics::Surface *RivenGraphics::getBackScreen() {
return _mainScreen;
}
Graphics::Surface *RivenGraphics::getEffectScreen() {
return _effectScreen;
}
const FliesEffect::FliesEffectData FliesEffect::_firefliesParameters = {
true,
true,
true,
true,
3.0,
0.7,
40,
2.0,
1.0,
8447718,
30,
10
};
const FliesEffect::FliesEffectData FliesEffect::_fliesParameters = {
false,
false,
false,
true,
8.0,
3.0,
80,
3.0,
1.0,
661528,
30,
10
};
FliesEffect::FliesEffect(MohawkEngine_Riven *vm, uint16 count, bool fireflies) :
_vm(vm) {
_effectSurface = _vm->_gfx->getEffectScreen();
_backSurface = _vm->_gfx->getBackScreen();
_gameRect = Common::Rect(608, 392);
if (fireflies) {
_parameters = &_firefliesParameters;
} else {
_parameters = &_fliesParameters;
}
_updatePeriodMs = 66;
_nextUpdateTime = _vm->_system->getMillis();
initFlies(count);
}
FliesEffect::~FliesEffect() {
}
void FliesEffect::initFlies(uint16 count) {
_fly.resize(count);
for (uint16 i = 0; i < _fly.size(); i++) {
initFlyRandomPosition(i);
}
}
void FliesEffect::initFlyRandomPosition(uint index) {
int posX = _vm->_rnd->getRandomNumber(_gameRect.right - 3);
int posY = _vm->_rnd->getRandomNumber(_gameRect.bottom - 3);
if (posY < 100) {
posY = 100;
}
initFlyAtPosition(index, posX, posY, 15);
}
int FliesEffect::randomBetween(int min, int max) {
return _vm->_rnd->getRandomNumber(max - min) + min;
}
void FliesEffect::initFlyAtPosition(uint index, int posX, int posY, int posZ) {
FliesEffectEntry &fly = _fly[index];
fly.posX = posX;
fly.posXFloat = posX;
fly.posY = posY;
fly.posYFloat = posY;
fly.posZ = posZ;
fly.light = true;
fly.framesTillLightSwitch = randomBetween(_parameters->minFramesLit, _parameters->minFramesLit + _parameters->maxLightDuration);
fly.hasBlur = false;
fly.directionAngleRad = randomBetween(0, 300) / 100.0f;
fly.directionAngleRadZ = randomBetween(0, 300) / 100.0f;
fly.speed = randomBetween(0, 100) / 100.0f;
}
void FliesEffect::update() {
if (_nextUpdateTime <= _vm->_system->getMillis()) {
_nextUpdateTime = _updatePeriodMs + _vm->_system->getMillis();
updateFlies();
draw();
updateScreen();
}
}
void FliesEffect::updateFlies() {
for (uint i = 0; i < _fly.size(); i++) {
updateFlyPosition(i);
if (_fly[i].posX < 1 || _fly[i].posX > _gameRect.right - 4 || _fly[i].posY > _gameRect.bottom - 4) {
initFlyRandomPosition(i);
}
if (_parameters->lightable) {
_fly[i].framesTillLightSwitch--;
if (_fly[i].framesTillLightSwitch <= 0) {
_fly[i].light = !_fly[i].light;
_fly[i].framesTillLightSwitch = randomBetween(_parameters->minFramesLit, _parameters->minFramesLit + _parameters->maxLightDuration);
_fly[i].hasBlur = false;
}
}
}
}
void FliesEffect::updateFlyPosition(uint index) {
FliesEffectEntry &fly = _fly[index];
if (fly.directionAngleRad > 2.0f * M_PI) {
fly.directionAngleRad = fly.directionAngleRad - 2.0f * M_PI;
}
if (fly.directionAngleRad < 0.0f) {
fly.directionAngleRad = fly.directionAngleRad + 2.0f * M_PI;
}
if (fly.directionAngleRadZ > 2.0f * M_PI) {
fly.directionAngleRadZ = fly.directionAngleRadZ - 2.0f * M_PI;
}
if (fly.directionAngleRadZ < 0.0f) {
fly.directionAngleRadZ = fly.directionAngleRadZ + 2.0f * M_PI;
}
fly.posXFloat += cos(fly.directionAngleRad) * fly.speed;
fly.posYFloat += sin(fly.directionAngleRad) * fly.speed;
fly.posX = fly.posXFloat;
fly.posY = fly.posYFloat;
selectAlphaMap(
fly.posXFloat - fly.posX >= 0.5,
fly.posYFloat - fly.posY >= 0.5,
&fly.alphaMap,
&fly.width,
&fly.height);
fly.posZFloat += cos(fly.directionAngleRadZ) * (fly.speed / 2.0f);
fly.posZ = fly.posZFloat;
if (_parameters->canBlur && fly.speed > _parameters->blurSpeedTreshold) {
fly.hasBlur = true;
float blurPosXFloat = cos(fly.directionAngleRad + M_PI) * _parameters->blurDistance + fly.posXFloat;
float blurPosYFloat = sin(fly.directionAngleRad + M_PI) * _parameters->blurDistance + fly.posYFloat;
fly.blurPosX = blurPosXFloat;
fly.blurPosY = blurPosYFloat;
selectAlphaMap(
blurPosXFloat - fly.blurPosX >= 0.5,
blurPosYFloat - fly.blurPosY >= 0.5,
&fly.blurAlphaMap,
&fly.blurWidth,
&fly.blurHeight);
}
if (fly.posY >= 100) {
int maxAngularSpeed = _parameters->maxAcceleration;
if (fly.posZ > 15) {
maxAngularSpeed /= 2;
}
int angularSpeed = randomBetween(-maxAngularSpeed, maxAngularSpeed);
fly.directionAngleRad += angularSpeed / 100.0f;
} else {
// Make the flies go down if they are too high in the screen
int angularSpeed = randomBetween(0, 50);
if (fly.directionAngleRad >= M_PI / 2.0f && fly.directionAngleRad <= 3.0f * M_PI / 2.0f) {
// Going down
fly.directionAngleRad -= angularSpeed / 100.0f;
} else {
// Going up
fly.directionAngleRad += angularSpeed / 100.0f;
}
if (fly.posY < 1) {
initFlyRandomPosition(index);
}
}
if (fly.posZ >= 0) {
int distanceToScreenEdge;
if (fly.posX / 10 >= (_gameRect.right - fly.posX) / 10) {
distanceToScreenEdge = (_gameRect.right - fly.posX) / 10;
} else {
distanceToScreenEdge = fly.posX / 10;
}
if (distanceToScreenEdge > (_gameRect.bottom - fly.posY) / 10) {
distanceToScreenEdge = (_gameRect.bottom - fly.posY) / 10;
}
if (distanceToScreenEdge > 30) {
distanceToScreenEdge = 30;
}
if (fly.posZ <= distanceToScreenEdge) {
fly.directionAngleRadZ += randomBetween(-_parameters->maxAcceleration, _parameters->maxAcceleration) / 100.0f;
} else {
fly.posZ = distanceToScreenEdge;
fly.directionAngleRadZ += M_PI;
}
} else {
fly.posZ = 0;
fly.directionAngleRadZ += M_PI;
}
float minSpeed = _parameters->minSpeed - fly.posZ / 40.0f;
float maxSpeed = _parameters->maxSpeed - fly.posZ / 20.0f;
fly.speed += randomBetween(-_parameters->maxAcceleration, _parameters->maxAcceleration) / 100.0f;
if (fly.speed > maxSpeed) {
fly.speed -= randomBetween(0, 50) / 100.0f;
}
if (fly.speed < minSpeed) {
fly.speed += randomBetween(0, 50) / 100.0f;
}
}
void FliesEffect::selectAlphaMap(bool horGridOffset, bool vertGridoffset, const uint16 **alphaMap, uint *width, uint *height) {
static const uint16 alpha1[12] = {
8, 16, 8,
16, 32, 16,
8, 16, 8,
0, 0, 0
};
static const uint16 alpha2[12] = {
4, 12, 12, 4,
8, 24, 24, 8,
4, 12, 12, 4
};
static const uint16 alpha3[12] = {
4, 8, 4,
12, 24, 12,
12, 24, 12,
4, 8, 4
};
static const uint16 alpha4[16] = {
2, 6, 6, 2,
6, 18, 18, 6,
6, 18, 18, 6,
2, 6, 6, 2
};
static const uint16 alpha5[12] = {
4, 8, 4,
8, 32, 8,
4, 8, 4,
0, 0, 0
};
static const uint16 alpha6[12] = {
2, 6, 6, 2,
4, 24, 24, 4,
2, 6, 6, 2
};
static const uint16 alpha7[12] = {
2, 4, 2,
6, 24, 6,
6, 24, 6,
2, 4, 2
};
static const uint16 alpha8[16] = {
1, 3, 3, 1,
3, 18, 18, 3,
3, 18, 18, 3,
1, 3, 3, 1
};
struct AlphaMap {
bool horizontalGridOffset;
bool verticalGridOffset;
bool isLarge;
uint16 width;
uint16 height;
const uint16 *pixels;
};
static const AlphaMap alphaSelector[] = {
{ true, true, true, 4, 4, alpha4 },
{ true, true, false, 4, 4, alpha8 },
{ true, false, true, 4, 3, alpha2 },
{ true, false, false, 4, 3, alpha6 },
{ false, true, true, 3, 4, alpha3 },
{ false, true, false, 3, 4, alpha7 },
{ false, false, true, 3, 3, alpha1 },
{ false, false, false, 3, 3, alpha5 }
};
for (uint i = 0; i < ARRAYSIZE(alphaSelector); i++) {
if (alphaSelector[i].horizontalGridOffset == horGridOffset
&& alphaSelector[i].verticalGridOffset == vertGridoffset
&& alphaSelector[i].isLarge == _parameters->isLarge) {
*alphaMap = alphaSelector[i].pixels;
*width = alphaSelector[i].width;
*height = alphaSelector[i].height;
return;
}
}
error("Unknown flies alpha map case");
}
void FliesEffect::draw() {
const Graphics::PixelFormat format = _effectSurface->format;
for (uint i = 0; i < _fly.size(); i++) {
FliesEffectEntry &fly = _fly[i];
uint32 color = _parameters->color32;
if (!fly.light) {
color = _fliesParameters.color32;
}
bool hoveringBrightBackground = false;
for (uint y = 0; y < fly.height; y++) {
uint16 *pixel = (uint16 *) _effectSurface->getBasePtr(fly.posX, fly.posY + y);
for (uint x = 0; x < fly.width; x++) {
byte r, g, b;
format.colorToRGB(*pixel, r, g, b);
if (_parameters->unlightIfTooBright) {
if (r >= 192 || g >= 192 || b >= 192) {
hoveringBrightBackground = true;
}
}
colorBlending(color, r, g, b, fly.alphaMap[fly.width * y + x] - fly.posZ);
*pixel = format.RGBToColor(r, g, b);
++pixel;
}
}
Common::Rect drawRect = Common::Rect(fly.width, fly.height);
drawRect.translate(fly.posX, fly.posY);
addToScreenDirtyRects(drawRect);
addToEffectsDirtyRects(drawRect);
if (fly.hasBlur) {
for (uint y = 0; y < fly.blurHeight; y++) {
uint16 *pixel = (uint16 *) _effectSurface->getBasePtr(fly.blurPosX, fly.blurPosY + y);
for (uint x = 0; x < fly.blurWidth; x++) {
byte r, g, b;
format.colorToRGB(*pixel, r, g, b);
colorBlending(color, r, g, b, fly.blurAlphaMap[fly.blurWidth * y + x] - fly.posZ);
*pixel = format.RGBToColor(r, g, b);
++pixel;
}
}
Common::Rect drawRect2 = Common::Rect(fly.blurWidth, fly.blurHeight);
drawRect2.translate(fly.blurPosX, fly.blurPosY);
addToScreenDirtyRects(drawRect2);
addToEffectsDirtyRects(drawRect2);
fly.hasBlur = false;
}
if (hoveringBrightBackground) {
fly.hasBlur = false;
if (_parameters->lightable) {
fly.light = false;
fly.framesTillLightSwitch = randomBetween(_parameters->minFramesLit, _parameters->minFramesLit + _parameters->maxLightDuration);
}
if (_vm->_rnd->getRandomBit()) {
fly.directionAngleRad += M_PI / 2.0;
} else {
fly.directionAngleRad -= M_PI / 2.0;
}
}
}
}
void FliesEffect::colorBlending(uint32 flyColor, byte &r, byte &g, byte &b, int alpha) {
alpha = CLIP(alpha, 0, 32);
byte flyR = (flyColor & 0x000000FF) >> 0;
byte flyG = (flyColor & 0x0000FF00) >> 8;
byte flyB = (flyColor & 0x00FF0000) >> 16;
r = (32 * r + alpha * (flyR - r)) / 32;
g = (32 * g + alpha * (flyG - g)) / 32;
b = (32 * b + alpha * (flyB - b)) / 32;
}
void FliesEffect::updateScreen() {
for (uint i = 0; i < _screenSurfaceDirtyRects.size(); i++) {
const Common::Rect &rect = _screenSurfaceDirtyRects[i];
_vm->_system->copyRectToScreen(_effectSurface->getBasePtr(rect.left, rect.top),
_effectSurface->pitch, rect.left, rect.top,
rect.width(), rect.height()
);
}
_screenSurfaceDirtyRects.clear();
restoreEffectsSurface();
}
void FliesEffect::addToScreenDirtyRects(const Common::Rect &rect) {
for (uint i = 0; i < _screenSurfaceDirtyRects.size(); i++) {
if (rect.intersects(_screenSurfaceDirtyRects[i])) {
_screenSurfaceDirtyRects[i].extend(rect);
return;
}
}
_screenSurfaceDirtyRects.push_back(rect);
}
void FliesEffect::addToEffectsDirtyRects(const Common::Rect &rect) {
for (uint i = 0; i < _effectsSurfaceDirtyRects.size(); i++) {
if (rect.intersects(_effectsSurfaceDirtyRects[i])) {
_effectsSurfaceDirtyRects[i].extend(rect);
return;
}
}
_effectsSurfaceDirtyRects.push_back(rect);
}
void FliesEffect::restoreEffectsSurface() {
for (uint i = 0; i < _effectsSurfaceDirtyRects.size(); i++) {
const Common::Rect &rect = _effectsSurfaceDirtyRects[i];
_effectSurface->copyRectToSurface(*_backSurface, rect.left, rect.top, rect);
addToScreenDirtyRects(rect);
}
_effectsSurfaceDirtyRects.clear();
}
} // End of namespace Mohawk
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