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-rw-r--r--engines/cge/bitmap.cpp391
1 files changed, 391 insertions, 0 deletions
diff --git a/engines/cge/bitmap.cpp b/engines/cge/bitmap.cpp
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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.
+ *
+ */
+
+/*
+ * This code is based on original Soltys source code
+ * Copyright (c) 1994-1995 Janus B. Wisniewski and L.K. Avalon
+ */
+
+#include "cge/bitmap.h"
+#include "cge/vga13h.h"
+#include "cge/cge_main.h"
+#include "common/system.h"
+#include "common/debug.h"
+#include "common/debug-channels.h"
+
+namespace CGE {
+
+Dac *Bitmap::_pal = NULL;
+
+void Bitmap::init() {
+ _pal = NULL;
+}
+
+void Bitmap::deinit() {
+}
+
+Bitmap::Bitmap(const char *fname) : _m(NULL), _v(NULL), _map(0) {
+ debugC(1, kCGEDebugBitmap, "Bitmap::Bitmap(%s)", fname);
+
+ char pat[kMaxPath];
+ forceExt(pat, fname, ".VBM");
+
+ if (_cat->exist(pat)) {
+ VFile file(pat);
+ if ((file._error == 0) && (!loadVBM(&file)))
+ error("Bad VBM [%s]", fname);
+ } else {
+ error("Bad VBM [%s]", fname);
+ }
+}
+
+Bitmap::Bitmap(uint16 w, uint16 h, uint8 *map) : _w(w), _h(h), _m(map), _v(NULL), _map(0) {
+ debugC(1, kCGEDebugBitmap, "Bitmap::Bitmap(%d, %d, map)", w, h);
+ if (map)
+ code();
+}
+
+// following routine creates filled rectangle
+// immediately as VGA video chunks, in near memory as fast as possible,
+// especially for text line real time display
+Bitmap::Bitmap(uint16 w, uint16 h, uint8 fill)
+ : _w((w + 3) & ~3), // only full uint32 allowed!
+ _h(h),
+ _m(NULL),
+ _map(0) {
+ debugC(1, kCGEDebugBitmap, "Bitmap::Bitmap(%d, %d, %d)", w, h, fill);
+
+ uint16 dsiz = _w >> 2; // data size (1 plane line size)
+ uint16 lsiz = 2 + dsiz + 2; // uint16 for line header, uint16 for gap
+ uint16 psiz = _h * lsiz; // - last gape, but + plane trailer
+ uint8 *v = new uint8[4 * psiz + _h * sizeof(*_b)];// the same for 4 planes
+ // + room for wash table
+ assert(v != NULL);
+
+ *(uint16 *) v = TO_LE_16(kBmpCPY | dsiz); // data chunk hader
+ memset(v + 2, fill, dsiz); // data bytes
+ *(uint16 *)(v + lsiz - 2) = TO_LE_16(kBmpSKP | ((kScrWidth / 4) - dsiz)); // gap
+
+ // Replicate lines
+ byte *destP;
+ for (destP = v + lsiz; destP < (v + psiz); destP += lsiz)
+ Common::copy(v, v + lsiz, destP);
+
+ *(uint16 *)(v + psiz - 2) = TO_LE_16(kBmpEOI); // plane trailer uint16
+
+ // Replicate planes
+ for (destP = v + psiz; destP < (v + 4 * psiz); destP += psiz)
+ Common::copy(v, v + psiz, destP);
+
+ HideDesc *b = (HideDesc *)(v + 4 * psiz);
+ b->_skip = (kScrWidth - _w) >> 2;
+ b->_hide = _w >> 2;
+
+ // Replicate across the entire table
+ for (HideDesc *hdP = b + 1; hdP < (b + _h); hdP++)
+ *hdP = *b;
+
+ b->_skip = 0; // fix the first entry
+ _v = v;
+ _b = b;
+}
+
+Bitmap::Bitmap(const Bitmap &bmp) : _w(bmp._w), _h(bmp._h), _m(NULL), _v(NULL), _map(0) {
+ debugC(1, kCGEDebugBitmap, "Bitmap::Bitmap(bmp)");
+ uint8 *v0 = bmp._v;
+ if (!v0)
+ return;
+
+ uint16 vsiz = (uint8 *)(bmp._b) - (uint8 *)(v0);
+ uint16 siz = vsiz + _h * sizeof(HideDesc);
+ uint8 *v1 = new uint8[siz];
+ assert(v1 != NULL);
+ memcpy(v1, v0, siz);
+ _b = (HideDesc *)((_v = v1) + vsiz);
+}
+
+Bitmap::~Bitmap() {
+ debugC(6, kCGEDebugBitmap, "Bitmap::~Bitmap()");
+
+ free(_m);
+ delete[] _v;
+}
+
+Bitmap &Bitmap::operator = (const Bitmap &bmp) {
+ debugC(1, kCGEDebugBitmap, "&Bitmap::operator =");
+
+ uint8 *v0 = bmp._v;
+ _w = bmp._w;
+ _h = bmp._h;
+ _m = NULL;
+ _map = 0;
+ delete[] _v;
+
+ if (v0 == NULL) {
+ _v = NULL;
+ } else {
+ uint16 vsiz = (uint8 *)bmp._b - (uint8 *)v0;
+ uint16 siz = vsiz + _h * sizeof(HideDesc);
+ uint8 *v1 = (uint8 *)malloc(sizeof(uint8) * siz);
+ assert(v1 != NULL);
+ memcpy(v1, v0, siz);
+ _b = (HideDesc *)((_v = v1) + vsiz);
+ }
+ return *this;
+}
+
+uint16 Bitmap::moveVmap(uint8 *buf) {
+ debugC(1, kCGEDebugBitmap, "Bitmap::moveVmap(buf)");
+
+ if (!_v)
+ return 0;
+
+ uint16 vsiz = (uint8 *)_b - (uint8 *)_v;
+ uint16 siz = vsiz + _h * sizeof(HideDesc);
+ memcpy(buf, _v, siz);
+ delete[] _v;
+ _b = (HideDesc *)((_v = buf) + vsiz);
+ return siz;
+}
+
+BitmapPtr Bitmap::code() {
+ debugC(1, kCGEDebugBitmap, "Bitmap::code()");
+
+ if (!_m)
+ return false;
+
+ uint16 cnt;
+
+ if (_v) { // old X-map exists, so remove it
+ delete[] _v;
+ _v = NULL;
+ }
+
+ while (true) { // at most 2 times: for (V == NULL) & for allocated block;
+ uint8 *im = _v + 2;
+ uint16 *cp = (uint16 *) _v;
+ int bpl;
+
+ if (_v) { // 2nd pass - fill the hide table
+ for (uint16 i = 0; i < _h; i++) {
+ _b[i]._skip = 0xFFFF;
+ _b[i]._hide = 0x0000;
+ }
+ }
+ for (bpl = 0; bpl < 4; bpl++) { // once per each bitplane
+ uint8 *bm = _m;
+ bool skip = (bm[bpl] == kPixelTransp);
+ uint16 j;
+
+ cnt = 0;
+ for (uint16 i = 0; i < _h; i++) { // once per each line
+ uint8 pix;
+ for (j = bpl; j < _w; j += 4) {
+ pix = bm[j];
+ if (_v && pix != kPixelTransp) {
+ if (j < _b[i]._skip)
+ _b[i]._skip = j;
+
+ if (j >= _b[i]._hide)
+ _b[i]._hide = j + 1;
+ }
+ if ((pix == kPixelTransp) != skip || cnt >= 0x3FF0) { // end of block
+ cnt |= (skip) ? kBmpSKP : kBmpCPY;
+ if (_v)
+ *cp = TO_LE_16(cnt); // store block description uint16
+
+ cp = (uint16 *) im;
+ im += 2;
+ skip = (pix == kPixelTransp);
+ cnt = 0;
+ }
+ if (!skip) {
+ if (_v)
+ *im = pix;
+ im++;
+ }
+ cnt++;
+ }
+
+ bm += _w;
+ if (_w < kScrWidth) {
+ if (skip) {
+ cnt += (kScrWidth - j + 3) / 4;
+ } else {
+ cnt |= kBmpCPY;
+ if (_v)
+ *cp = TO_LE_16(cnt);
+
+ cp = (uint16 *) im;
+ im += 2;
+ skip = true;
+ cnt = (kScrWidth - j + 3) / 4;
+ }
+ }
+ }
+ if (cnt && ! skip) {
+ cnt |= kBmpCPY;
+ if (_v)
+ *cp = TO_LE_16(cnt);
+
+ cp = (uint16 *) im;
+ im += 2;
+ }
+ if (_v)
+ *cp = TO_LE_16(kBmpEOI);
+ cp = (uint16 *) im;
+ im += 2;
+ }
+ if (_v)
+ break;
+
+ uint16 sizV = (uint16)(im - 2 - _v);
+ _v = new uint8[sizV + _h * sizeof(*_b)];
+ assert(_v != NULL);
+
+ _b = (HideDesc *)(_v + sizV);
+ }
+ cnt = 0;
+ for (uint16 i = 0; i < _h; i++) {
+ if (_b[i]._skip == 0xFFFF) { // whole line is skipped
+ _b[i]._skip = (cnt + kScrWidth) >> 2;
+ cnt = 0;
+ } else {
+ uint16 s = _b[i]._skip & ~3;
+ uint16 h = (_b[i]._hide + 3) & ~3;
+ _b[i]._skip = (cnt + s) >> 2;
+ _b[i]._hide = (h - s) >> 2;
+ cnt = kScrWidth - h;
+ }
+ }
+
+ return this;
+}
+
+bool Bitmap::solidAt(int16 x, int16 y) {
+ debugC(6, kCGEDebugBitmap, "Bitmap::solidAt(%d, %d)", x, y);
+
+ if ((x >= _w) || (y >= _h))
+ return false;
+
+ uint8 *m = _v;
+ uint16 r = static_cast<uint16>(x) % 4;
+ uint16 n0 = (kScrWidth * y + x) / 4;
+ uint16 n = 0;
+
+ while (r) {
+ uint16 w, t;
+
+ w = READ_LE_UINT16(m);
+ m += 2;
+ t = w & 0xC000;
+ w &= 0x3FFF;
+
+ switch (t) {
+ case kBmpEOI:
+ r--;
+ case kBmpSKP:
+ w = 0;
+ break;
+ case kBmpREP:
+ w = 1;
+ break;
+ }
+ m += w;
+ }
+
+ while (true) {
+ uint16 w, t;
+
+ w = READ_LE_UINT16(m);
+ m += 2;
+ t = w & 0xC000;
+ w &= 0x3FFF;
+
+ if (n > n0)
+ return false;
+
+ n += w;
+ switch (t) {
+ case kBmpEOI:
+ return false;
+ case kBmpSKP:
+ w = 0;
+ break;
+ case kBmpREP:
+ case kBmpCPY:
+ if (n - w <= n0 && n > n0)
+ return true;
+ break;
+ }
+ m += ((t == kBmpREP) ? 1 : w);
+ }
+}
+
+bool Bitmap::loadVBM(VFile *f) {
+ debugC(5, kCGEDebugBitmap, "Bitmap::loadVBM(f)");
+
+ uint16 p = 0, n = 0;
+ if (f->_error == 0)
+ f->read((uint8 *)&p, sizeof(p));
+ p = FROM_LE_16(p);
+
+ if (f->_error == 0)
+ f->read((uint8 *)&n, sizeof(n));
+ n = FROM_LE_16(n);
+
+ if (f->_error == 0)
+ f->read((uint8 *)&_w, sizeof(_w));
+ _w = FROM_LE_16(_w);
+
+ if (f->_error == 0)
+ f->read((uint8 *)&_h, sizeof(_h));
+ _h = FROM_LE_16(_h);
+
+ if (f->_error == 0) {
+ if (p) {
+ if (_pal) {
+ // Read in the palette
+ byte palData[kPalSize];
+ f->read(palData, kPalSize);
+
+ const byte *srcP = palData;
+ for (int idx = 0; idx < kPalCount; idx++, srcP += 3) {
+ _pal[idx]._r = *srcP;
+ _pal[idx]._g = *(srcP + 1);
+ _pal[idx]._b = *(srcP + 2);
+ }
+ } else
+ f->seek(f->mark() + kPalSize);
+ }
+ }
+ if ((_v = new uint8[n]) == NULL)
+ return false;
+
+ if (f->_error == 0)
+ f->read(_v, n);
+
+ _b = (HideDesc *)(_v + n - _h * sizeof(HideDesc));
+ return (f->_error == 0);
+}
+
+} // End of namespace CGE
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