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author | uruk | 2014-04-29 09:50:40 +0200 |
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committer | uruk | 2014-04-29 09:50:40 +0200 |
commit | ec71f936280496d349310ea0091dbe26b90ae540 (patch) | |
tree | c82e841ab69dcec31fd74ba87f5bc88b7f25ae32 /engines/cge2/bitmap.cpp | |
parent | 258d7ea535c2891bed4132e649c66fb86967a2a0 (diff) | |
download | scummvm-rg350-ec71f936280496d349310ea0091dbe26b90ae540.tar.gz scummvm-rg350-ec71f936280496d349310ea0091dbe26b90ae540.tar.bz2 scummvm-rg350-ec71f936280496d349310ea0091dbe26b90ae540.zip |
CGE2: Add parts of the graphics code.
Diffstat (limited to 'engines/cge2/bitmap.cpp')
-rw-r--r-- | engines/cge2/bitmap.cpp | 369 |
1 files changed, 369 insertions, 0 deletions
diff --git a/engines/cge2/bitmap.cpp b/engines/cge2/bitmap.cpp new file mode 100644 index 0000000000..77c7eb9c41 --- /dev/null +++ b/engines/cge2/bitmap.cpp @@ -0,0 +1,369 @@ +/* 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 Sfinx source code + * Copyright (c) 1994-1997 Janus B. Wisniewski and L.K. Avalon + */ + +#include "cge2/bitmap.h" +#include "cge2/cge2.h" +#include "cge2/vga13h.h" +//#include "cge/cge_main.h" +#include "common/system.h" +#include "common/debug.h" +#include "common/debug-channels.h" + +namespace CGE2 { + +Bitmap::Bitmap(CGE2Engine *vm, const char *fname) : _m(NULL), _v(NULL), _map(0), _vm(vm) { + char pat[kMaxPath]; + forceExt(pat, fname, ".VBM"); + + if (_vm->_resman->exist(pat)) { + EncryptedStream file(_vm, pat); + if (file.err()) + error("Unable to find VBM [%s]", fname); + if (!loadVBM(&file)) + error("Bad VBM [%s]", fname); + } else { + error("Bad VBM [%s]", fname); + } +} + +Bitmap::Bitmap(CGE2Engine *vm, uint16 w, uint16 h, uint8 *map) : _w(w), _h(h), _m(map), _v(NULL), _map(0), _b(NULL), _vm(vm) { + 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(CGE2Engine *vm, uint16 w, uint16 h, uint8 fill) + : _w((w + 3) & ~3), // only full uint32 allowed! + _h(h), _m(NULL), _map(0), _b(NULL), _vm(vm) { + + 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); + + WRITE_LE_UINT16(v, (kBmpCPY | dsiz)); // data chunk hader + memset(v + 2, fill, dsiz); // data bytes + WRITE_LE_UINT16(v + lsiz - 2, (kBmpSKP | ((kScrWidth / 4) - dsiz))); // gap + + // Replicate lines + byte *destP; + for (destP = v + lsiz; destP < (v + psiz); destP += lsiz) + Common::copy(v, v + lsiz, destP); + + WRITE_LE_UINT16(v + psiz - 2, 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(CGE2Engine *vm, const Bitmap &bmp) : _w(bmp._w), _h(bmp._h), _m(NULL), _v(NULL), _map(0), _b(NULL), _vm(vm) { + 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() { + free(_m); + delete[] _v; +} + +Bitmap &Bitmap::operator=(const Bitmap &bmp) { + if (this == &bmp) + return *this; + + uint8 *v0 = bmp._v; + _w = bmp._w; + _h = bmp._h; + _m = NULL; + _map = 0; + _vm = bmp._vm; + delete[] _v; + + if (v0 == NULL) { + _v = NULL; + } else { + 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); + } + return *this; +} + +char *Bitmap::forceExt(char *buf, const char *name, const char *ext) { + strcpy(buf, name); + char *dot = strrchr(buf, '.'); + if (dot) + *dot = '\0'; + strcat(buf, ext); + + return buf; +} + +BitmapPtr Bitmap::code() { + if (!_m) + return NULL; + + 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) + WRITE_LE_UINT16(cp, 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) + WRITE_LE_UINT16(cp, cnt); + + cp = (uint16 *) im; + im += 2; + skip = true; + cnt = (kScrWidth - j + 3) / 4; + } + } + } + if (cnt && ! skip) { + cnt |= kBmpCPY; + if (_v) + WRITE_LE_UINT16(cp, cnt); + + cp = (uint16 *) im; + im += 2; + } + if (_v) + WRITE_LE_UINT16(cp, 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) { + 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--; + // No break on purpose + 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(EncryptedStream *f) { + uint16 p = 0, n = 0; + if (!f->err()) + f->read((uint8 *)&p, sizeof(p)); + p = FROM_LE_16(p); + + if (!f->err()) + f->read((uint8 *)&n, sizeof(n)); + n = FROM_LE_16(n); + + if (!f->err()) + f->read((uint8 *)&_w, sizeof(_w)); + _w = FROM_LE_16(_w); + + if (!f->err()) + f->read((uint8 *)&_h, sizeof(_h)); + _h = FROM_LE_16(_h); + + if (!f->err()) { + if (p) { + if (_vm->_bitmapPalette) { + // Read in the palette + byte palData[kPalSize]; + f->read(palData, kPalSize); + + const byte *srcP = palData; + for (int idx = 0; idx < kPalCount; idx++, srcP += 3) { + _vm->_bitmapPalette[idx]._r = *srcP; + _vm->_bitmapPalette[idx]._g = *(srcP + 1); + _vm->_bitmapPalette[idx]._b = *(srcP + 2); + } + } else + f->seek(f->pos() + kPalSize); + } + } + if ((_v = new uint8[n]) == NULL) + return false; + + if (!f->err()) + f->read(_v, n); + + _b = (HideDesc *)(_v + n - _h * sizeof(HideDesc)); + return (!f->err()); +} + +} // End of namespace CGE2 |