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STARTREK: Palette fading

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This commit is contained in:
Matthew Stewart 2018-05-13 15:29:57 -04:00 committed by Eugene Sandulenko
parent 4927cd90b7
commit dbeb58f392
3 changed files with 75 additions and 19 deletions
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78
engines/startrek/graphics.cpp
View File

@ -52,13 +52,17 @@ Graphics::Graphics(StarTrekEngine *vm) : _vm(vm), _egaMode(false) {
_textboxVar6 = 0;
_textboxHasMultipleChoices = false;
_palData = new byte[256 * 3];
_lutData = new byte[256 * 3];
_paletteFadeLevel = 0;
setMouseCursor(loadBitmap("pushbtn"));
CursorMan.showMouse(true);
}
Graphics::~Graphics() {
delete[] _egaData;
delete[] _lutData;
delete _font;
}
@ -68,35 +72,79 @@ void Graphics::setBackgroundImage(SharedPtr<Bitmap> bitmap) {
_backgroundImage = bitmap;
}
/**
* Note: this doesn't flush the palette to the screen (must call "setPaletteFadeLevel")
*/
void Graphics::loadPalette(const Common::String &paletteName) {
// Set the palette from a PAL file
Common::String palFile = paletteName + ".PAL";
Common::String lutFile = paletteName + ".LUT";
SharedPtr<Common::SeekableReadStream> palStream = _vm->loadFile(palFile.c_str());
byte *palette = new byte[256 * 3];
palStream->read(palette, 256 * 3);
// Expand color components
if (_vm->getPlatform() == Common::kPlatformDOS || _vm->getPlatform() == Common::kPlatformMacintosh)
for (uint16 i = 0; i < 256 * 3; i++)
palette[i] <<= 2;
_vm->_system->getPaletteManager()->setPalette(palette, 0, 256);
delete[] palette;
palStream->read(_palData, 256 * 3);
// Load LUT file
SharedPtr<Common::SeekableReadStream> lutStream = _vm->loadFile(lutFile.c_str());
delete[] _lutData;
_lutData = new byte[256];
lutStream->read(_lutData, 256);
}
void Graphics::fadeinScreen() {
while (_paletteFadeLevel <= 100) {
TrekEvent event;
do {
_vm->popNextEvent(&event);
}
while (event.type != TREKEVENT_TICK);
setPaletteFadeLevel(_palData, _paletteFadeLevel);
_paletteFadeLevel += 10;
}
_paletteFadeLevel = 100;
}
void Graphics::fadeoutScreen() {
while (_paletteFadeLevel >= 0) {
TrekEvent event;
do {
_vm->popNextEvent(&event);
}
while (event.type != TREKEVENT_TICK);
setPaletteFadeLevel(_palData, _paletteFadeLevel);
_paletteFadeLevel -= 10;
}
_paletteFadeLevel = 0;
}
/**
* This flushes the palette to the screen. fadeLevel ranges from 0-100.
*/
void Graphics::setPaletteFadeLevel(byte *palData, int fadeLevel) {
byte palBuffer[256 * 3];
int multiplier = (fadeLevel << 8) / 100;
for (uint16 i = 0; i < 256 * 3; i++) {
palBuffer[i] = (palData[i] * multiplier) >> 8;
// Expand color components
if (_vm->getPlatform() == Common::kPlatformDOS || _vm->getPlatform() == Common::kPlatformMacintosh)
palBuffer[i] <<= 2;
}
_vm->_system->getPaletteManager()->setPalette(palBuffer, 0, 256);
// FIXME: this isn't supposed to flush changes to graphics, only palettes.
// Might not matter...
_vm->_system->updateScreen();
}
void Graphics::loadPri(const char *priFile) {
SharedPtr<Common::SeekableReadStream> priStream = _vm->loadFile(priFile);
priStream->read(_priData, SCREEN_WIDTH*SCREEN_HEIGHT / 2);
priStream->read(_priData, SCREEN_WIDTH * SCREEN_HEIGHT / 2);
}
void Graphics::clearPri() {

8
engines/startrek/graphics.h
View File

@ -71,7 +71,12 @@ public:
~Graphics();
void setBackgroundImage(SharedPtr<Bitmap> bitmap);
void loadPalette(const String &paletteFile);
void fadeinScreen();
void fadeoutScreen();
void setPaletteFadeLevel(byte *palData, int fadeLevel);
void loadPri(const char *priFile);
void clearPri();
byte getPriValue(int x, int y);
@ -99,9 +104,12 @@ private:
bool _egaMode;
byte *_egaData;
byte *_palData;
byte *_lutData;
byte _priData[SCREEN_WIDTH*SCREEN_HEIGHT / 2];
int16 _paletteFadeLevel;
Common::Rect _screenRect;
SharedPtr<Bitmap> _backgroundImage;

8
engines/startrek/startrek.cpp
View File

@ -214,7 +214,7 @@ void StarTrekEngine::runTransportSequence(const Common::String &name) {
};
_sound->stopAllVocSounds();
// sub_1e70d();
_gfx->fadeoutScreen();
objectFunc1();
initObjects();
@ -229,7 +229,7 @@ void StarTrekEngine::runTransportSequence(const Common::String &name) {
Common::String filename = getCrewmanAnimFilename(i, name);
int x = crewmanTransportPositions[i][0];
int y = crewmanTransportPositions[i][1];
loadAnimationForObject(i, filename, x, y, 128);
loadAnimationForObject(i, filename, x, y, 256);
_objectList[i].animationString[0] = '\0';
}
@ -252,7 +252,7 @@ void StarTrekEngine::runTransportSequence(const Common::String &name) {
// TODO: redraw mouse and sprite_52c4e?
_gfx->drawAllSprites();
// sub_1e6ab();
_gfx->fadeinScreen();
playSoundEffectIndex(0x0a);
@ -276,7 +276,7 @@ void StarTrekEngine::runTransportSequence(const Common::String &name) {
// TODO: redraw sprite_52c4e?
_gfx->drawAllSprites();
// sub_1e70d();
_gfx->fadeoutScreen();
objectFunc1();
initObjects();
}