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scummvm/sky/screen.cpp

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/* ScummVM - Scumm Interpreter
* Copyright (C) 2003 The ScummVM project
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#include "stdafx.h"
#include "common/system.h"
#include "sky/disk.h"
#include "sky/logic.h"
#include "sky/screen.h"
#include "sky/sky.h"
#include "sky/skydefs.h"
#include "sky/struc.h"
namespace Sky {
uint8 Screen::_top16Colours[16*3] = {
0, 0, 0,
38, 38, 38,
63, 63, 63,
0, 0, 0,
0, 0, 0,
0, 0, 0,
0, 0, 0,
54, 54, 54,
45, 47, 49,
32, 31, 41,
29, 23, 37,
23, 18, 30,
49, 11, 11,
39, 5, 5,
29, 1, 1,
63, 63, 63
};
Screen::Screen(OSystem *pSystem, Disk *pDisk) {
_system = pSystem;
_skyDisk = pDisk;
int i;
uint8 tmpPal[1024];
_system->init_size(FULL_SCREEN_WIDTH, FULL_SCREEN_HEIGHT);
_gameGrid = (uint8 *)malloc(GRID_X * GRID_Y * 2);
forceRefresh();
_currentScreen = NULL;
_scrollScreen = NULL;
//blank the first 240 colors of the palette
memset(tmpPal, 0, GAME_COLOURS * 4);
//set the remaining colors
for (i = 0; i < (VGA_COLOURS-GAME_COLOURS); i++) {
tmpPal[4 * GAME_COLOURS + i * 4] = (_top16Colours[i * 3] << 2) + (_top16Colours[i * 3] & 3);
tmpPal[4 * GAME_COLOURS + i * 4 + 1] = (_top16Colours[i * 3 + 1] << 2) + (_top16Colours[i * 3 + 1] & 3);
tmpPal[4 * GAME_COLOURS + i * 4 + 2] = (_top16Colours[i * 3 + 2] << 2) + (_top16Colours[i * 3 + 2] & 3);
tmpPal[4 * GAME_COLOURS + i * 4 + 3] = 0x00;
}
//set the palette
_system->set_palette(tmpPal, 0, VGA_COLOURS);
_currentPalette = 0;
_seqInfo.framesLeft = 0;
_seqInfo.seqData = _seqInfo.seqDataPos = NULL;
_seqInfo.running = false;
}
Screen::~Screen(void) {
free(_gameGrid);
if (_currentScreen) free(_currentScreen);
}
void Screen::clearScreen(void) {
memset(_currentScreen, 0, FULL_SCREEN_WIDTH * FULL_SCREEN_HEIGHT);
_system->copy_rect(_currentScreen, GAME_SCREEN_WIDTH, 0, 0, GAME_SCREEN_WIDTH, GAME_SCREEN_HEIGHT);
_system->update_screen();
}
//set a new palette, pal is a pointer to dos vga rgb components 0..63
void Screen::setPalette(uint8 *pal) {
convertPalette(pal, _palette);
_system->set_palette(_palette, 0, GAME_COLOURS);
_system->update_screen();
}
void Screen::setPaletteEndian(uint8 *pal) {
#ifdef SCUMM_BIG_ENDIAN
uint8 endPalette[256 * 3];
for (uint16 cnt = 0; cnt < 256 * 3; cnt++)
endPalette[cnt] = pal[cnt ^ 1];
convertPalette(endPalette, _palette);
#else
convertPalette(pal, _palette);
#endif
_system->set_palette(_palette, 0, GAME_COLOURS);
_system->update_screen();
}
void Screen::halvePalette(void) {
uint8 halfPalette[1024];
for (uint8 cnt = 0; cnt < GAME_COLOURS; cnt++) {
halfPalette[(cnt << 2) | 0] = _palette[(cnt << 2) | 0] >> 1;
halfPalette[(cnt << 2) | 1] = _palette[(cnt << 2) | 1] >> 1;
halfPalette[(cnt << 2) | 2] = _palette[(cnt << 2) | 2] >> 1;
halfPalette[(cnt << 2) | 3] = 0;
}
_system->set_palette(halfPalette, 0, GAME_COLOURS);
}
void Screen::setPalette(uint16 fileNum) {
uint8 *tmpPal = _skyDisk->loadFile(fileNum, NULL);
if (tmpPal) {
setPalette(tmpPal);
free(tmpPal);
} else warning("Screen::setPalette: can't load file nr. %d",fileNum);
}
void Screen::showScreen(uint16 fileNum) {
if (_currentScreen) free(_currentScreen);
_currentScreen = _skyDisk->loadFile(fileNum, NULL);
if (_currentScreen) showScreen(_currentScreen);
else warning("Screen::showScreen: can't load file nr. %d",fileNum);
}
void Screen::showScreen(uint8 *pScreen) {
_system->copy_rect(pScreen, 320, 0, 0, GAME_SCREEN_WIDTH, GAME_SCREEN_HEIGHT);
_system->update_screen();
}
void Screen::convertPalette(uint8 *inPal, uint8* outPal) { //convert 3 byte 0..63 rgb to 4byte 0..255 rgbx
int i;
for (i = 0; i < VGA_COLOURS; i++) {
outPal[4 * i] = (inPal[3 * i] << 2) + (inPal[3 * i] & 3);
outPal[4 * i + 1] = (inPal[3 * i + 1] << 2) + (inPal[3 * i + 1] & 3);
outPal[4 * i + 2] = (inPal[3 * i + 2] << 2) + (inPal[3 * i + 2] & 3);
outPal[4 * i + 3] = 0x00;
}
}
void Screen::recreate(void) {
// check the game grid for changed blocks
if (!Logic::_scriptVariables[LAYER_0_ID]) return ;
uint8 *gridPos = _gameGrid;
uint8 *screenData = (uint8 *)SkyEngine::fetchItem(Logic::_scriptVariables[LAYER_0_ID]);
if (!screenData) {
error("Screen::recreate():\nSkyEngine::fetchItem(Logic::_scriptVariables[LAYER_0_ID](%X)) returned NULL",Logic::_scriptVariables[LAYER_0_ID]);
}
uint8 *screenPos = _currentScreen;
for (uint8 cnty = 0; cnty < GRID_Y; cnty++) {
for (uint8 cntx = 0; cntx < GRID_X; cntx++) {
if (gridPos[0] & 0x80) {
gridPos[0] &= 0x7F; // reset recreate flag
gridPos[0] |= 1; // set bit for flip routine
uint8 *savedScreenY = screenPos;
for (uint8 gridCntY = 0; gridCntY < GRID_H; gridCntY++) {
memcpy(screenPos, screenData, GRID_W);
screenPos += GAME_SCREEN_WIDTH;
screenData += GRID_W;
}
screenPos = savedScreenY + GRID_W;
} else {
screenPos += GRID_W;
screenData += GRID_W * GRID_H;
}
gridPos++;
}
screenPos += (GRID_H - 1) * GAME_SCREEN_WIDTH;
}
}
void Screen::flip(bool doUpdate) {
uint32 copyX, copyWidth;
copyX = copyWidth = 0;
for (uint8 cnty = 0; cnty < GRID_Y; cnty++) {
for (uint8 cntx = 0; cntx < GRID_X; cntx++) {
if (_gameGrid[cnty * GRID_X + cntx] & 1) {
_gameGrid[cnty * GRID_X + cntx] &= ~1;
if (!copyWidth) copyX = cntx * GRID_W;
copyWidth += GRID_W;
} else if (copyWidth) {
_system->copy_rect(_currentScreen + cnty * GRID_H * GAME_SCREEN_WIDTH + copyX, GAME_SCREEN_WIDTH, copyX, cnty * GRID_H, copyWidth, GRID_H);
copyWidth = 0;
}
}
if (copyWidth) {
_system->copy_rect(_currentScreen + cnty * GRID_H * GAME_SCREEN_WIDTH + copyX, GAME_SCREEN_WIDTH, copyX, cnty * GRID_H, copyWidth, GRID_H);
copyWidth = 0;
}
}
if (doUpdate)
_system->update_screen();
}
void Screen::fnDrawScreen(uint32 palette, uint32 scroll) {
// set up the new screen
fnFadeDown(scroll);
forceRefresh();
recreate();
spriteEngine();
flip(false);
fnFadeUp(palette, scroll);
}
void Screen::fnFadeDown(uint32 scroll) {
if (scroll && (!(SkyEngine::_systemVars.systemFlags & SF_NO_SCROLL))) {
// scrolling is performed by fnFadeUp. It's just prepared here
_scrollScreen = _currentScreen;
_currentScreen = (uint8 *)malloc(FULL_SCREEN_WIDTH * FULL_SCREEN_HEIGHT);
// the game will draw the new room into _currentScreen which
// will be scrolled into the visible screen by fnFadeUp
// fnFadeUp also frees the _scrollScreen
} else {
for (uint8 cnt = 0; cnt < 32; cnt++) {
palette_fadedown_helper((uint32 *)_palette, GAME_COLOURS);
_system->set_palette(_palette, 0, GAME_COLOURS);
_system->update_screen();
_system->delay_msecs(20);
}
}
}
void Screen::palette_fadedown_helper(uint32 *pal, uint num) {
byte *p = (byte *)pal;
do {
if (p[0] >= 8)
p[0] -= 8;
else
p[0] = 0;
if (p[1] >= 8)
p[1] -= 8;
else
p[1] = 0;
if (p[2] >= 8)
p[2] -= 8;
else
p[2] = 0;
p += sizeof(uint32);
} while (--num);
}
void Screen::paletteFadeUp(uint16 fileNr) {
uint8 *pal = _skyDisk->loadFile(fileNr, NULL);
if (pal) {
paletteFadeUp(pal);
free(pal);
} else warning("Screen::paletteFadeUp: Can't load palette #%d",fileNr);
}
void Screen::paletteFadeUp(uint8 *pal) {
byte tmpPal[1024];
convertPalette(pal, tmpPal);
for (uint8 cnt = 1; cnt <= 32; cnt++) {
for (uint8 colCnt = 0; colCnt < GAME_COLOURS; colCnt++) {
_palette[(colCnt << 2) | 0] = (tmpPal[(colCnt << 2) | 0] * cnt) >> 5;
_palette[(colCnt << 2) | 1] = (tmpPal[(colCnt << 2) | 1] * cnt) >> 5;
_palette[(colCnt << 2) | 2] = (tmpPal[(colCnt << 2) | 2] * cnt) >> 5;
}
_system->set_palette(_palette, 0, GAME_COLOURS);
_system->update_screen();
_system->delay_msecs(20);
}
}
void Screen::fnFadeUp(uint32 palNum, uint32 scroll) {
//_currentScreen points to new screen,
//_scrollScreen points to graphic showing old room
if ((scroll != 123) && (scroll != 321)) {
scroll = 0;
}
if ((scroll == 0) || (SkyEngine::_systemVars.systemFlags & SF_NO_SCROLL)) {
uint8 *palette = (uint8 *)SkyEngine::fetchCompact(palNum);
if (palette == NULL)
error("Screen::fnFadeUp: can't fetch compact %X", palNum);
#ifdef SCUMM_BIG_ENDIAN
byte tmpPal[256 * 3];
for (uint16 cnt = 0; cnt < 256*3; cnt++)
tmpPal[cnt] = palette[cnt ^ 1];
paletteFadeUp(tmpPal);
#else
paletteFadeUp(palette);
#endif
} else if (scroll == 123) {
// scroll left (going right)
if (!_currentScreen) error("Screen::fnFadeUp[Scroll L]: _currentScreen is NULL");
if (!_scrollScreen) error("Screen::fnFadeUp[Scroll L]: _scrollScreen is NULL");
uint8 *scrNewPtr, *scrOldPtr;
for (uint8 scrollCnt = 0; scrollCnt < (GAME_SCREEN_WIDTH / SCROLL_JUMP) - 1; scrollCnt++) {
scrNewPtr = _currentScreen + scrollCnt * SCROLL_JUMP;
scrOldPtr = _scrollScreen;
for (uint8 lineCnt = 0; lineCnt < GAME_SCREEN_HEIGHT; lineCnt++) {
memmove(scrOldPtr, scrOldPtr + SCROLL_JUMP, GAME_SCREEN_WIDTH - SCROLL_JUMP);
memcpy(scrOldPtr + GAME_SCREEN_WIDTH - SCROLL_JUMP, scrNewPtr, SCROLL_JUMP);
scrNewPtr += GAME_SCREEN_WIDTH;
scrOldPtr += GAME_SCREEN_WIDTH;
}
showScreen(_scrollScreen);
waitForTimer();
}
showScreen(_currentScreen);
free(_scrollScreen);
} else if (scroll == 321) {
// scroll right (going left)
if (!_currentScreen) error("Screen::fnFadeUp[Scroll R]: _currentScreen is NULL");
if (!_scrollScreen) error("Screen::fnFadeUp[Scroll R]: _scrollScreen is NULL");
uint8 *scrNewPtr, *scrOldPtr;
for (uint8 scrollCnt = 0; scrollCnt < (GAME_SCREEN_WIDTH / SCROLL_JUMP) - 1; scrollCnt++) {
scrNewPtr = _currentScreen + GAME_SCREEN_WIDTH - (scrollCnt + 1) * SCROLL_JUMP;
scrOldPtr = _scrollScreen;
for (uint8 lineCnt = 0; lineCnt < GAME_SCREEN_HEIGHT; lineCnt++) {
memmove(scrOldPtr + SCROLL_JUMP, scrOldPtr, GAME_SCREEN_WIDTH - SCROLL_JUMP);
memcpy(scrOldPtr, scrNewPtr, SCROLL_JUMP);
scrNewPtr += GAME_SCREEN_WIDTH;
scrOldPtr += GAME_SCREEN_WIDTH;
}
showScreen(_scrollScreen);
waitForTimer();
}
showScreen(_currentScreen);
free(_scrollScreen);
}
}
void Screen::waitForTimer(void) {
_gotTick = false;
while (!_gotTick) {
OSystem::Event event;
_system->delay_msecs(10);
while (_system->poll_event(&event));
}
}
void Screen::waitForSequence(void) {
while (_seqInfo.running) {
OSystem::Event event;
_system->delay_msecs(20);
while (_system->poll_event(&event));
}
}
void Screen::handleTimer(void) {
_gotTick = true;
if (_seqInfo.running)
processSequence();
}
void Screen::startSequence(uint16 fileNum) {
_seqInfo.seqData = _skyDisk->loadFile(fileNum, NULL);
_seqInfo.framesLeft = _seqInfo.seqData[0];
_seqInfo.seqDataPos = _seqInfo.seqData + 1;
_seqInfo.delay = SEQ_DELAY;
_seqInfo.running = true;
_seqInfo.runningItem = false;
}
void Screen::startSequenceItem(uint16 itemNum) {
_seqInfo.seqData = (uint8 *)SkyEngine::fetchItem(itemNum);
_seqInfo.framesLeft = _seqInfo.seqData[0] - 1;
_seqInfo.seqDataPos = _seqInfo.seqData + 1;
_seqInfo.delay = SEQ_DELAY;
_seqInfo.running = true;
_seqInfo.runningItem = true;
}
void Screen::stopSequence() {
_seqInfo.running = false;
waitForTimer();
waitForTimer();
_seqInfo.framesLeft = 0;
free(_seqInfo.seqData);
_seqInfo.seqData = _seqInfo.seqDataPos = NULL;
}
void Screen::processSequence(void) {
uint32 screenPos = 0;
_seqInfo.delay--;
if (_seqInfo.delay == 0) {
_seqInfo.delay = SEQ_DELAY;
memset(_seqGrid, 0, 12 * 20);
uint8 nrToSkip, nrToDo, cnt;
do {
do {
nrToSkip = _seqInfo.seqDataPos[0];
_seqInfo.seqDataPos++;
screenPos += nrToSkip;
} while (nrToSkip == 0xFF);
do {
nrToDo = _seqInfo.seqDataPos[0];
_seqInfo.seqDataPos++;
uint8 gridSta = (uint8)((screenPos / (GAME_SCREEN_WIDTH * 16))*20 + ((screenPos % GAME_SCREEN_WIDTH) >> 4));
uint8 gridEnd = (uint8)(((screenPos+nrToDo) / (GAME_SCREEN_WIDTH * 16))*20 + (((screenPos+nrToDo) % GAME_SCREEN_WIDTH) >> 4));
if (gridEnd >= gridSta)
for (cnt = gridSta; cnt <= gridEnd; cnt++)
_seqGrid[cnt] = 1;
else {
for (cnt = gridSta; cnt < (gridSta / 20 + 1) * 20; cnt++)
_seqGrid[cnt] = 1;
for (cnt = (gridEnd / 20) * 20; cnt <= gridEnd; cnt++)
_seqGrid[cnt] = 1;
}
for (cnt = 0; cnt < nrToDo; cnt++) {
_currentScreen[screenPos] = _seqInfo.seqDataPos[0];
_seqInfo.seqDataPos++;
screenPos++;
}
} while (nrToDo == 0xFF);
} while (screenPos < (GAME_SCREEN_WIDTH * GAME_SCREEN_HEIGHT));
uint8 *gridPtr = _seqGrid; uint8 *scrPtr = _currentScreen; uint8 *rectPtr = NULL;
uint8 rectWid = 0, rectX = 0, rectY = 0;
for (uint8 cnty = 0; cnty < 12; cnty++) {
for (uint8 cntx = 0; cntx < 20; cntx++) {
if (*gridPtr) {
if (!rectWid) {
rectX = cntx;
rectY = cnty;
rectPtr = scrPtr;
}
rectWid++;
} else if (rectWid) {
_system->copy_rect(rectPtr, GAME_SCREEN_WIDTH, rectX << 4, rectY << 4, rectWid << 4, 16);
rectWid = 0;
}
scrPtr += 16;
gridPtr++;
}
if (rectWid) {
_system->copy_rect(rectPtr, GAME_SCREEN_WIDTH, rectX << 4, rectY << 4, rectWid << 4, 16);
rectWid = 0;
}
scrPtr += 15 * GAME_SCREEN_WIDTH;
}
_system->update_screen();
_seqInfo.framesLeft--;
}
if (_seqInfo.framesLeft == 0) {
_seqInfo.running = false;
if (!_seqInfo.runningItem)
free(_seqInfo.seqData);
_seqInfo.seqData = _seqInfo.seqDataPos = NULL;
}
}
//- sprites.asm routines
void Screen::spriteEngine(void) {
doSprites(BACK);
sortSprites();
doSprites(FORE);
}
void Screen::sortSprites(void) {
StSortList sortList[30];
uint32 currDrawList = DRAW_LIST_NO;
uint32 loadDrawList;
bool nextDrawList = false;
while (Logic::_scriptVariables[currDrawList]) {
// big_sort_loop
uint32 spriteCnt = 0;
loadDrawList = Logic::_scriptVariables[currDrawList];
currDrawList++;
do { // a_new_draw_list:
uint16 *drawListData = (uint16 *)SkyEngine::fetchCompact(loadDrawList);
nextDrawList = false;
while ((!nextDrawList) && (drawListData[0])) {
if (drawListData[0] == 0xFFFF) {
loadDrawList = drawListData[1];
nextDrawList = true;
} else {
// process_this_id:
Compact *spriteComp = SkyEngine::fetchCompact(drawListData[0]);
if ((spriteComp->status & 4) && // is it sortable playfield?(!?!)
(spriteComp->screen == Logic::_scriptVariables[SCREEN])) { // on current screen
dataFileHeader *spriteData =
(dataFileHeader *)SkyEngine::fetchItem(spriteComp->frame >> 6);
if (!spriteData) {
debug(9,"Missing file %d", spriteComp->frame >> 6);
spriteComp->status = 0;
} else {
sortList[spriteCnt].yCood = spriteComp->ycood + spriteData->s_offset_y + spriteData->s_height;
sortList[spriteCnt].compact = spriteComp;
sortList[spriteCnt].sprite = spriteData;
spriteCnt++;
}
}
drawListData++;
}
}
} while (nextDrawList);
// made_list:
if (spriteCnt > 1) { // bubble sort
for (uint32 cnt1 = 0; cnt1 < spriteCnt - 1; cnt1++)
for (uint32 cnt2 = cnt1 + 1; cnt2 < spriteCnt; cnt2++)
if (sortList[cnt1].yCood > sortList[cnt2].yCood) {
StSortList tmp;
tmp.yCood = sortList[cnt1].yCood;
tmp.sprite = sortList[cnt1].sprite;
tmp.compact = sortList[cnt1].compact;
sortList[cnt1].yCood = sortList[cnt2].yCood;
sortList[cnt1].sprite = sortList[cnt2].sprite;
sortList[cnt1].compact = sortList[cnt2].compact;
sortList[cnt2].yCood = tmp.yCood;
sortList[cnt2].sprite = tmp.sprite;
sortList[cnt2].compact = tmp.compact;
}
}
for (uint32 cnt = 0; cnt < spriteCnt; cnt++) {
drawSprite((uint8 *)sortList[cnt].sprite, sortList[cnt].compact);
if (sortList[cnt].compact->status & 8) vectorToGame(0x81);
else vectorToGame(1);
if (!(sortList[cnt].compact->status & 0x200)) verticalMask();
}
}
}
void Screen::doSprites(uint8 layer) {
uint16 drawListNum = DRAW_LIST_NO;
uint32 idNum;
uint16* drawList;
while (Logic::_scriptVariables[drawListNum]) { // std sp loop
idNum = Logic::_scriptVariables[drawListNum];
drawListNum++;
drawList = (uint16 *)SkyEngine::fetchCompact(idNum);
while(drawList[0]) {
// new_draw_list:
while ((drawList[0] != 0) && (drawList[0] != 0xFFFF)) {
// back_loop:
// not_new_list
Compact *spriteData = SkyEngine::fetchCompact(drawList[0]);
drawList++;
if ((spriteData->status & (1 << layer)) &&
(spriteData->screen == Logic::_scriptVariables[SCREEN])) {
uint8 *toBeDrawn = (uint8 *)SkyEngine::fetchItem(spriteData->frame >> 6);
if (!toBeDrawn) {
debug(9, "Spritedata %d not loaded", spriteData->frame >> 6);
spriteData->status = 0;
} else {
drawSprite(toBeDrawn, spriteData);
if (layer == BACK) verticalMask();
if (spriteData->status & 8) vectorToGame(0x81);
else vectorToGame(1);
}
}
}
while (drawList[0] == 0xFFFF)
drawList = (uint16 *)SkyEngine::fetchCompact(drawList[1]);
}
}
}
void Screen::drawSprite(uint8 *spriteInfo, Compact *sprCompact) {
if (spriteInfo == NULL) {
warning("Screen::drawSprite Can't draw sprite. Data %d was not loaded", sprCompact->frame >> 6);
sprCompact->status = 0;
return ;
}
dataFileHeader *sprDataFile = (dataFileHeader *)spriteInfo;
_sprWidth = sprDataFile->s_width;
_sprHeight = sprDataFile->s_height;
_maskX1 = _maskX2 = 0;
uint8 *spriteData = spriteInfo + (sprCompact->frame & 0x3F) * sprDataFile->s_sp_size;
spriteData += sizeof(dataFileHeader);
int32 spriteY = sprCompact->ycood + sprDataFile->s_offset_y - TOP_LEFT_Y;
if (spriteY < 0) {
spriteY = -spriteY;
if (_sprHeight <= (uint32)spriteY) {
_sprWidth = 0;
return ;
}
_sprHeight -= spriteY;
spriteData += sprDataFile->s_width * spriteY;
spriteY = 0;
} else {
int32 botClip = GAME_SCREEN_HEIGHT - sprDataFile->s_height - spriteY;
if (botClip < 0) {
botClip = -botClip;
if (_sprHeight <= (uint32)botClip) {
_sprWidth = 0;
return ;
}
_sprHeight -= botClip;
}
}
_sprY = (uint32)spriteY;
int32 spriteX = sprCompact->xcood + sprDataFile->s_offset_x - TOP_LEFT_X;
if (spriteX < 0) {
spriteX = -spriteX;
if (_sprWidth <= (uint32)spriteX) {
_sprWidth = 0;
return ;
}
_sprWidth -= spriteX;
_maskX1 = spriteX;
spriteX = 0;
} else {
int32 rightClip = GAME_SCREEN_WIDTH - (sprDataFile->s_width + spriteX);
if (rightClip < 0) {
rightClip = (-rightClip) + 1;
if (_sprWidth <= (uint32)rightClip) {
_sprWidth = 0;
return ;
}
_sprWidth -= rightClip;
_maskX2 = rightClip;
}
}
_sprX = (uint32)spriteX;
uint8 *screenPtr = _currentScreen + _sprY * GAME_SCREEN_WIDTH + _sprX;
if ((_sprHeight > 192) || (_sprY > 192)) {
_sprWidth = 0;
return;
}
if ((_sprX + _sprWidth > 320) || (_sprY + _sprHeight > 192)) {
warning("Screen::drawSprite fatal error: got x = %d, y = %d, w = %d, h = %d",_sprX, _sprY, _sprWidth, _sprHeight);
_sprWidth = 0;
return ;
}
for (uint16 cnty = 0; cnty < _sprHeight; cnty++) {
for (uint16 cntx = 0; cntx < _sprWidth; cntx++)
if (spriteData[cntx + _maskX1]) screenPtr[cntx] = spriteData[cntx + _maskX1];
spriteData += _sprWidth + _maskX2 + _maskX1;
screenPtr += GAME_SCREEN_WIDTH;
}
// Convert the sprite coordinate/size values to blocks for vertical mask and/or vector to game
_sprWidth += _sprX + GRID_W-1;
_sprHeight += _sprY + GRID_H-1;
_sprX >>= GRID_W_SHIFT;
_sprWidth >>= GRID_W_SHIFT;
_sprY >>= GRID_H_SHIFT;
_sprHeight >>= GRID_H_SHIFT;
_sprWidth -= _sprX;
_sprHeight -= _sprY;
}
void Screen::vectorToGame(uint8 gridVal) {
if (_sprWidth == 0) return ;
uint8 *trgGrid = _gameGrid + _sprY * GRID_X +_sprX;
for (uint32 cnty = 0; cnty < _sprHeight; cnty++) {
for (uint32 cntx = 0; cntx < _sprWidth; cntx++)
trgGrid[cntx] |= gridVal;
trgGrid += GRID_X;
}
}
void Screen::vertMaskSub(uint16 *grid, uint32 gridOfs, uint8 *screenPtr, uint32 layerId) {
for (uint32 cntx = 0; cntx < _sprHeight; cntx++) { // start_x | block_loop
if (grid[gridOfs]) {
if (!(FROM_LE_16(grid[gridOfs]) & 0x8000)) {
uint32 gridVal = FROM_LE_16(grid[gridOfs]) - 1;
gridVal *= GRID_W * GRID_H;
uint8 *dataSrc = (uint8 *)SkyEngine::fetchItem(Logic::_scriptVariables[layerId]) + gridVal;
uint8 *dataTrg = screenPtr;
for (uint32 grdCntY = 0; grdCntY < GRID_H; grdCntY++) {
for (uint32 grdCntX = 0; grdCntX < GRID_W; grdCntX++)
if (dataSrc[grdCntX]) dataTrg[grdCntX] = dataSrc[grdCntX];
dataSrc += GRID_W;
dataTrg += GAME_SCREEN_WIDTH;
}
} // dummy_end:
screenPtr -= GRID_H * GAME_SCREEN_WIDTH;
gridOfs -= GRID_X;
} else return;
} // next_x
}
void Screen::verticalMask(void) {
if (_sprWidth == 0) return ;
uint32 startGridOfs = (_sprY + _sprHeight - 1) * GRID_X + _sprX;
uint8 *startScreenPtr = (_sprY + _sprHeight - 1) * GRID_H * GAME_SCREEN_WIDTH + _sprX * GRID_W + _currentScreen;
for (uint32 layerCnt = LAYER_1_ID; layerCnt <= LAYER_3_ID; layerCnt++) {
uint32 gridOfs = startGridOfs;
uint8 *screenPtr = startScreenPtr;
for (uint32 widCnt = 0; widCnt < _sprWidth; widCnt++) { // x_loop
uint32 nLayerCnt = layerCnt;
while (Logic::_scriptVariables[nLayerCnt + 3]) {
uint16 *scrGrid;
scrGrid = (uint16 *)SkyEngine::fetchItem(Logic::_scriptVariables[layerCnt + 3]);
if (scrGrid[gridOfs]) {
vertMaskSub(scrGrid, gridOfs, screenPtr, layerCnt);
break;
} else nLayerCnt++;
}
// next_x:
screenPtr += GRID_W;
gridOfs++;
}
}
}
void Screen::paintBox(uint16 x, uint16 y) {
uint8 *screenPos = _currentScreen + y * GAME_SCREEN_WIDTH + x;
memset(screenPos, 255, 8);
for (uint8 cnt = 1; cnt < 8; cnt++) {
*(screenPos + cnt * GAME_SCREEN_WIDTH) = 255;
*(screenPos + cnt * GAME_SCREEN_WIDTH + 7) = 255;
}
memset(screenPos + 7 * GAME_SCREEN_WIDTH, 255, 7);
}
void Screen::showGrid(uint8 *gridBuf) {
uint32 gridData = 0;
uint8 bitsLeft = 0;
for (uint16 cnty = 0; cnty < GAME_SCREEN_HEIGHT >> 3; cnty++) {
for (uint16 cntx = 0; cntx < GAME_SCREEN_WIDTH >> 3; cntx++) {
if (!bitsLeft) {
bitsLeft = 32;
gridData = *(uint32 *)gridBuf;
gridBuf += 4;
}
if (gridData & 0x80000000)
paintBox(cntx << 3, cnty << 3);
bitsLeft--;
gridData <<= 1;
}
}
_system->copy_rect(_currentScreen, GAME_SCREEN_WIDTH, 0, 0, GAME_SCREEN_WIDTH, GAME_SCREEN_HEIGHT);
}
} // End of namespace Sky
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