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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.
*
* $URL$
* $Id$
*
*/
/*
* This code is based on original Hugo Trilogy source code
*
* Copyright (c) 1989-1995 David P. Gray
*
*/
// Display.c - DIB related code for HUGOWIN
#include "common/system.h"
#include "hugo/game.h"
#include "hugo/hugo.h"
#include "hugo/display.h"
#include "hugo/file.h"
#include "hugo/util.h"
namespace Hugo {
#define CENTER -1 // Used to center text in x
#define NUM_COLORS 16 // Num colors to save in palette
#define DMAX 16 // Size of add/restore rect lists
#define BMAX (DMAX * 2) // Size of dirty rect blit list
#define INX(X, B) (X >= B->x && X <= B->x + B->dx)
#define INY(Y, B) (Y >= B->y && Y <= B->y + B->dy)
#define OVERLAP(A, B) ((INX(A->x, B) || INX(A->x + A->dx, B) || INX(B->x, A) || INX(B->x + B->dx, A)) && (INY(A->y, B) || INY(A->y + A->dy, B) || INY(B->y, A) || INY(B->y + B->dy, A)))
struct rect_t { // Rectangle used in Display list
int16 x; // Position in dib
int16 y; // Position in dib
int16 dx; // width
int16 dy; // height
};
Screen::Screen(HugoEngine &vm) : _vm(vm) {
}
Screen::~Screen() {
}
void Screen::createPal() {
debugC(1, kDebugDisplay, "createPal");
g_system->setPalette(_vm._palette, 0, NUM_COLORS);
}
void Screen::initDisplay() {
debugC(1, kDebugDisplay, "initDisplay");
// Create logical palette
createPal();
}
// Move an image from source to destination
void Screen::moveImage(image_pt srcImage, uint16 x1, uint16 y1, uint16 dx, uint16 dy, uint16 width1, image_pt dstImage, uint16 x2, uint16 y2, uint16 width2) {
int16 wrap_src = width1 - dx; // Wrap to next src row
int16 wrap_dst = width2 - dx; // Wrap to next dst row
int16 x;
debugC(3, kDebugDisplay, "moveImage(srcImage, %d, %d, %d, %d, %d, dstImage, %d, %d, %d)", x1, y1, dx, dy, width1, x2, y2, width2);
srcImage += y1 * width1 + x1; // Offset into src image
dstImage += y2 * width2 + x2; // offset into dst image
while (dy--) { // For each row
for (x = dx; x--;) // For each column
*dstImage++ = *srcImage++;
srcImage += wrap_src; // Wrap to next line
dstImage += wrap_dst;
}
}
void Screen::displayBackground() {
debugC(1, kDebugDisplay, "displayBackground");
g_system->copyRectToScreen(_frontBuffer, 320, 0, 0, 320, 200);
}
// Blit the supplied rectangle from _frontBuffer to the screen
void Screen::displayRect(int16 x, int16 y, int16 dx, int16 dy) {
debugC(3, kDebugDisplay, "displayRect(%d, %d, %d, %d)", x, y, dx, dy);
g_system->copyRectToScreen(&_frontBuffer[x + y * 320], 320, x, y, dx, dy);
}
void Screen::remapPal(uint16 oldIndex, uint16 newIndex) {
// Change a color by remapping supplied palette index with new index
debugC(1, kDebugDisplay, "Remap_pal(%d, %d)", oldIndex, newIndex);
warning("STUB: Remap_pal()");
//bminfo.bmiColors[oldIndex] = ctab[newIndex];
}
void Screen::savePal(Common::WriteStream *f) {
debugC(1, kDebugDisplay, "savePal");
warning("STUB: savePal()");
//fwrite(bminfo.bmiColors, sizeof(bminfo.bmiColors), 1, f);
}
void Screen::restorePal(Common::SeekableReadStream *f) {
debugC(1, kDebugDisplay, "restorePal");
warning("STUB: restorePal()");
//fread(bminfo.bmiColors, sizeof(bminfo.bmiColors), 1, f);
}
// Set the new background color
void Screen::setBackgroundColor(long color) {
debugC(1, kDebugDisplay, "setBackgroundColor(%ld)", color);
// How??? Translate existing pixels in dib before objects rendered?
}
// Return the overlay state (Foreground/Background) of the currently
// processed object by looking down the current column for an overlay
// base bit set (in which case the object is foreground).
overlayState_t Screen::findOvl(seq_t *seq_p, image_pt dst_p, uint16 y) {
debugC(4, kDebugDisplay, "findOvl");
for (; y < seq_p->lines; y++) { // Each line in object
image_pt ovb_p = _vm.getBaseBoundaryOverlay() + ((uint16)(dst_p - _frontBuffer) >> 3); // Ptr into overlay bits
if (*ovb_p & (0x80 >> ((uint16)(dst_p - _frontBuffer) & 7))) // Overlay bit is set
return FG; // Found a bit - must be foreground
dst_p += XPIX;
}
return BG; // No bits set, must be background
}
// Merge an object frame into _frontBuffer at sx, sy and update rectangle list.
// If fore TRUE, force object above any overlay
void Screen::displayFrame(int sx, int sy, seq_t *seq, bool foreFl) {
overlayState_t overlayState = UNDEF; // Overlay state of object
image_pt image; // Ptr to object image data
image_pt subFrontBuffer; // Ptr to offset in _frontBuffer
image_pt overlay; // Ptr to overlay data
int16 frontBufferwrap; // Wrap dst_p to next line
int16 imageWrap; // Wrap src_p to next line
uint16 x, y; // Index into object data
debugC(3, kDebugDisplay, "displayFrame(%d, %d, seq, %d)", sx, sy, (foreFl) ? 1 : 0);
image = seq->imagePtr; // Source ptr
subFrontBuffer = &_frontBuffer[sy * XPIX + sx]; // Destination ptr
overlay = &_vm.getFirstOverlay()[(sy * XPIX + sx) >> 3]; // Overlay ptr
frontBufferwrap = XPIX - seq->x2 - 1; // Wraps dest_p after each line
imageWrap = seq->bytesPerLine8 - seq->x2 - 1;
for (y = 0; y < seq->lines; y++) { // Each line in object
for (x = 0; x <= seq->x2; x++) {
if (*image) { // Non-transparent
overlay = _vm.getFirstOverlay() + ((uint16)(subFrontBuffer - _frontBuffer) >> 3); // Ptr into overlay bits
if (*overlay & (0x80 >> ((uint16)(subFrontBuffer - _frontBuffer) & 7))) { // Overlay bit is set
if (overlayState == UNDEF) // Overlay defined yet?
overlayState = findOvl(seq, subFrontBuffer, y);// No, find it.
if (foreFl || overlayState == FG) // Object foreground
*subFrontBuffer = *image; // Copy pixel
} else // No overlay
*subFrontBuffer = *image; // Copy pixel
}
image++;
subFrontBuffer++;
}
image += imageWrap;
subFrontBuffer += frontBufferwrap;
}
// Add this rectangle to the display list
displayList(D_ADD, sx, sy, seq->x2 + 1, seq->lines);
}
// Merge rectangles A,B leaving result in B
void Screen::merge(rect_t *rectA, rect_t *rectB) {
debugC(6, kDebugDisplay, "merge");
int16 xa = rectA->x + rectA->dx; // Find x2,y2 for each rectangle
int16 xb = rectB->x + rectB->dx;
int16 ya = rectA->y + rectA->dy;
int16 yb = rectB->y + rectB->dy;
rectB->x = MIN(rectA->x, rectB->x); // Minimum x,y
rectB->y = MIN(rectA->y, rectB->y);
rectB->dx = MAX(xa, xb) - rectB->x; // Maximum dx,dy
rectB->dy = MAX(ya, yb) - rectB->y;
}
// Coalesce the rectangles in the restore/add list into one unified
// blist. len is the sizes of alist or rlist. blen is current length
// of blist. bmax is the max size of the blist. Note that blist can
// have holes, in which case dx = 0. Returns used length of blist.
int16 Screen::mergeLists(rect_t *list, rect_t *blist, int16 len, int16 blen, int16 bmax) {
int16 coalesce[BMAX]; // List of overlapping rects
debugC(4, kDebugDisplay, "mergeLists");
// Process the list
for (int16 a = 0; a < len; a++, list++) {
// Compile list of overlapping rectangles in blit list
int16 c = 0;
rect_t *bp = blist;
for (int16 b = 0; b < blen; b++, bp++)
if (bp->dx) // blist entry used
if (OVERLAP(list, bp))
coalesce[c++] = b;
// Any overlapping blit rects?
if (c == 0) // None, add a new entry
blist[blen++] = *list;
else { // At least one overlapping
// Merge add-list entry with first blist entry
bp = &blist[coalesce[0]];
merge(list, bp);
// Merge any more blist entries
while (--c) {
rect_t *cp = &blist[coalesce[c]];
merge(cp, bp);
cp->dx = 0; // Delete entry
}
}
}
return blen;
}
// Process the display list
// Trailing args are int16 x,y,dx,dy for the D_ADD operation
void Screen::displayList(dupdate_t update, ...) {
static int16 addIndex, restoreIndex; // Index into add/restore lists
static rect_t restoreList[DMAX]; // The restore list
static rect_t addList[DMAX]; // The add list
static rect_t blistList[BMAX]; // The blit list
int16 blitLength = 0; // Length of blit list
rect_t *p; // Ptr to dlist entry
va_list marker; // Args used for D_ADD operation
debugC(6, kDebugDisplay, "displayList");
switch (update) {
case D_INIT: // Init lists, restore whole screen
addIndex = restoreIndex = 0;
memcpy(_frontBuffer, _backBuffer, sizeof(_frontBuffer));
break;
case D_ADD: // Add a rectangle to list
if (addIndex >= DMAX) {
Utils::Warn(false, "%s", "Display list exceeded");
return;
}
va_start(marker, update); // Initialize variable arguments
p = &addList[addIndex];
p->x = va_arg(marker, int); // x
p->y = va_arg(marker, int); // y
p->dx = va_arg(marker, int); // dx
p->dy = va_arg(marker, int); // dy
va_end(marker); // Reset variable arguments
addIndex++;
break;
case D_DISPLAY: // Display whole list
// Don't blit if newscreen just loaded because _frontBuffer will
// get blitted via InvalidateRect() at end of this cycle
// and blitting here causes objects to appear too soon.
if (_vm.getGameStatus().newScreenFl) {
_vm.getGameStatus().newScreenFl = false;
break;
}
// Coalesce restore-list, add-list into combined blit-list
blitLength = mergeLists(restoreList, blistList, restoreIndex, blitLength, BMAX);
blitLength = mergeLists(addList, blistList, addIndex, blitLength, BMAX);
// Blit the combined blit-list
for (restoreIndex = 0, p = blistList; restoreIndex < blitLength; restoreIndex++, p++)
if (p->dx) // Marks a used entry
displayRect(p->x, p->y, p->dx, p->dy);
break;
case D_RESTORE: // Restore each rectangle
for (restoreIndex = 0, p = addList; restoreIndex < addIndex; restoreIndex++, p++) {
// Restoring from _backBuffer to _frontBuffer
restoreList[restoreIndex] = *p; // Copy add-list to restore-list
moveImage(_backBuffer, p->x, p->y, p->dx, p->dy, XPIX, _frontBuffer, p->x, p->y, XPIX);
}
addIndex = 0; // Reset add-list
break;
}
}
void Screen::writeChr(int sx, int sy, byte color, char *local_fontdata) {
/*
Write supplied character (font data) at sx,sy in supplied color
Font data as follows:
*(fontdata+1) = Font Height (pixels)
*(fontdata+1) = Font Width (pixels)
*(fontdata+x) = Font Bitmap (monochrome)
*/
debugC(2, kDebugDisplay, "writeChr(%d, %d, %d, %d)", sx, sy, color, local_fontdata[0]);
byte height = local_fontdata[0];
byte width = 8; //local_fontdata[1];
// This can probably be optimized quite a bit...
for (int y = 0; y < height; ++y)
for (int x = 0; x < width; ++x) {
int pixel = y * width + x;
int bitpos = pixel % 8;
int offset = pixel / 8;
byte bitTest = (1 << bitpos);
if ((local_fontdata[2 + offset] & bitTest) == bitTest)
_frontBuffer[(sy + y) * 320 + sx + x] = color;
//printf("offset: %u, bitpos %u\n", offset, bitpos);
}
}
// Returns height of characters in current font
int16 Screen::fontHeight() {
debugC(2, kDebugDisplay, "fontHeight");
static int16 height[NUM_FONTS] = {5, 7, 8};
return(height[_fnt - FIRST_FONT]);
}
// Returns length of supplied string in pixels
int16 Screen::stringLength(char *s) {
int16 sum;
byte **fontArr = _font[_fnt];
debugC(2, kDebugDisplay, "stringLength(%s)", s);
for (sum = 0; *s; s++)
sum += *(fontArr[(uint)*s] + 1) + 1;
return(sum);
}
// Return x which would center supplied string
int16 Screen::center(char *s) {
debugC(1, kDebugDisplay, "center(%s)", s);
return ((int16)((XPIX - stringLength(s)) >> 1));
}
// Write string at sx,sy in supplied color in current font
// If sx == CENTER, center it
void Screen::writeStr(int16 sx, int16 sy, char *s, byte color) {
byte **font = _font[_fnt];
debugC(2, kDebugDisplay, "writeStr(%d, %d, %s, %d)", sx, sy, s, color);
if (sx == CENTER)
sx = center(s);
for (; *s; s++) {
writeChr(sx, sy, color, (char *)font[(uint)*s]);
sx += *(font[(uint)*s] + 1) + 1;
}
}
// Shadowed version of writestr
void Screen::shadowStr(int16 sx, int16 sy, char *s, byte color) {
debugC(1, kDebugDisplay, "shadowStr(%d, %d, %s, %d)", sx, sy, s, color);
if (sx == CENTER)
sx = center(s);
writeStr(sx + 1, sy + 1, s, _TBLACK);
writeStr(sx, sy, s, color);
}
void Screen::userHelp() {
// Introduce user to the game
// DOS versions Only
Utils::Box(BOX_ANY , "%s",
"F1 - Press F1 again\n"
" for instructions\n"
"F2 - Sound on/off\n"
"F3 - Recall last line\n"
"F4 - Save game\n"
"F5 - Restore game\n"
"F6 - Inventory\n"
"F8 - Turbo button\n"
"F9 - Boss button\n\n"
"ESC - Return to game");
}
Screen_v1d::Screen_v1d(HugoEngine &vm) : Screen(vm) {
}
Screen_v1d::~Screen_v1d() {
}
// Load font file, construct font ptrs and reverse data bytes
// TODO: This uses hardcoded fonts in hugo.dat, it should be replaced
// by a proper implementation of .FON files
void Screen_v1d::loadFont(int16 fontId) {
byte height, width;
static bool fontLoadedFl[NUM_FONTS] = {false, false, false};
debugC(2, kDebugDisplay, "loadFont(%d)", fontId);
_fnt = fontId - FIRST_FONT; // Set current font number
if (fontLoadedFl[_fnt]) // If already loaded, return
return;
fontLoadedFl[_fnt] = true;
memcpy(_fontdata[_fnt], _vm._arrayFont[_fnt], _vm._arrayFontSize[_fnt]);
_font[_fnt][0] = _fontdata[_fnt]; // Store height,width of fonts
int16 offset = 2; // Start at fontdata[2] ([0],[1] used for height,width)
// Setup the font array (127 characters)
for (int i = 1; i < 128; i++) {
_font[_fnt][i] = _fontdata[_fnt] + offset;
height = *(_fontdata[_fnt] + offset);
width = *(_fontdata[_fnt] + offset + 1);
int16 size = height * ((width + 7) >> 3);
for (int j = 0; j < size; j++)
Utils::reverseByte(&_fontdata[_fnt][offset + 2 + j]);
offset += 2 + size;
}
}
Screen_v1w::Screen_v1w(HugoEngine &vm) : Screen(vm) {
}
Screen_v1w::~Screen_v1w() {
}
// Load font file, construct font ptrs and reverse data bytes
void Screen_v1w::loadFont(int16 fontId) {
byte height, width;
static bool fontLoadedFl[NUM_FONTS] = {false, false, false};
debugC(2, kDebugDisplay, "loadFont(%d)", fontId);
_fnt = fontId - FIRST_FONT; // Set current font number
if (fontLoadedFl[_fnt]) // If already loaded, return
return;
fontLoadedFl[_fnt] = true;
_vm.file().readUIFItem(fontId, _fontdata[_fnt]);
// Compile font ptrs. Note: First ptr points to height,width of font
_font[_fnt][0] = _fontdata[_fnt]; // Store height,width of fonts
int16 offset = 2; // Start at fontdata[2] ([0],[1] used for height,width)
// Setup the font array (127 characters)
for (int i = 1; i < 128; i++) {
_font[_fnt][i] = _fontdata[_fnt] + offset;
height = *(_fontdata[_fnt] + offset);
width = *(_fontdata[_fnt] + offset + 1);
int16 size = height * ((width + 7) >> 3);
for (int j = 0; j < size; j++)
Utils::reverseByte(&_fontdata[_fnt][offset + 2 + j]);
offset += 2 + size;
}
}
} // End of namespace Hugo
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