void Surface::loadScreen(MemoryBlock *rawData) {
PictureDecoder decoder;
uint16 v = READ_BE_UINT16(rawData->data());
bool is5Bit = (v & 0xfffe) == 0x140;
MemoryBlock *tmpScreen;
if (is5Bit)
// 5-bit decompression
tmpScreen = decoder.egaDecode(rawData, FULL_SCREEN_HEIGHT * FULL_SCREEN_WIDTH + 1);
else
// VGA decompression
tmpScreen = decoder.vgaDecode(rawData, FULL_SCREEN_HEIGHT * FULL_SCREEN_WIDTH + 1);
empty();
_data->copyFrom(tmpScreen, 0, MENUBAR_Y_SIZE * FULL_SCREEN_WIDTH,
(FULL_SCREEN_HEIGHT - MENUBAR_Y_SIZE) * FULL_SCREEN_WIDTH);
delete tmpScreen;
}
AnimationSequence::AnimationSequence(uint16 screenId, Palette &palette, bool fadeIn, int frameDelay,
const AnimSoundSequence *soundList): _screenId(screenId), _palette(palette),
_frameDelay(frameDelay), _soundList(soundList) {
Screen &screen = Screen::getReference();
PictureDecoder decoder;
Disk &d = Disk::getReference();
// Get the data and decode it. Note that VGA decompression is used
// even if the decompressed contents is actually EGA data
MemoryBlock *data = d.getEntry(_screenId);
_decodedData = decoder.vgaDecode(data, MAX_ANIM_DECODER_BUFFER_SIZE);
delete data;
_isEGA = LureEngine::getReference().isEGA();
if (_isEGA) {
// Setup for EGA animation
_lineRefs = NULL;
// Reset the palette and clear the screen for EGA decoding
screen.setPaletteEmpty(RES_PALETTE_ENTRIES);
screen.screen().empty();
// Load the screen - each four bytes contain the four planes
// worth of data for 8 sequential pixels
byte *pSrc = _decodedData->data();
byte *pDest = screen.screen().data().data() +
(FULL_SCREEN_WIDTH * MENUBAR_Y_SIZE);
for (int ctr = 0; ctr < FULL_SCREEN_WIDTH * (FULL_SCREEN_HEIGHT -
MENUBAR_Y_SIZE) / 8; ++ctr, pDest += EGA_PIXELS_PER_BYTE) {
for (int planeCtr = 0; planeCtr < EGA_NUM_LAYERS; ++planeCtr, ++pSrc) {
byte v = *pSrc;
for (int bitCtr = 0; bitCtr < 8; ++bitCtr, v <<= 1) {
if ((v & 0x80) != 0)
*(pDest + bitCtr) |= 1 << planeCtr;
}
}
}
screen.update();
screen.setPalette(&_palette, 0, _palette.numEntries());
// Set pointers for animation
_pPixels = pSrc;
_pPixelsEnd = _decodedData->data() + _decodedData->size() - 1;
_pLines = NULL;
_pLinesEnd = NULL;
} else {
// Setup for VGA animation
_lineRefs = d.getEntry(_screenId + 1);
// Reset the palette and set the initial starting screen
screen.setPaletteEmpty(RES_PALETTE_ENTRIES);
screen.screen().data().copyFrom(_decodedData, 0, 0, FULL_SCREEN_HEIGHT * FULL_SCREEN_WIDTH);
screen.update();
// Set the palette
if (fadeIn) screen.paletteFadeIn(&_palette);
else screen.setPalette(&_palette, 0, _palette.numEntries());
// Set up frame pointers
_pPixels = _decodedData->data() + SCREEN_SIZE;
_pPixelsEnd = _decodedData->data() + _decodedData->size() - 1;
_pLines = _lineRefs->data();
_pLinesEnd = _lineRefs->data() + _lineRefs->size() - 1;
}
}