diff options
Diffstat (limited to 'engines/dreamweb/backdrop.cpp')
| -rw-r--r-- | engines/dreamweb/backdrop.cpp | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/engines/dreamweb/backdrop.cpp b/engines/dreamweb/backdrop.cpp new file mode 100644 index 0000000000..010d314b74 --- /dev/null +++ b/engines/dreamweb/backdrop.cpp @@ -0,0 +1,134 @@ +/* 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. + * + */ + +#include "dreamweb/dreamweb.h" +#include "engines/util.h" +#include "graphics/surface.h" + +namespace DreamGen { + +uint8 DreamGenContext::getxad(const uint8 *setData, uint8 *result) { + uint8 v0 = setData[0]; + uint8 v1 = setData[1]; + uint8 v2 = setData[2]; + if (v0 != 0) + return 0; + if (v1 < data.byte(kMapx)) + return 0; + v1 -= data.byte(kMapx); + if (v1 >= 11) + return 0; + *result = (v1 << 4) | v2; + return 1; +} + +uint8 DreamGenContext::getyad(const uint8 *setData, uint8 *result) { + uint8 v0 = setData[3]; + uint8 v1 = setData[4]; + if (v0 < data.byte(kMapy)) + return 0; + v0 -= data.byte(kMapy); + if (v0 >= 10) + return 0; + *result = (v0 << 4) | v1; + return 1; +} + +void DreamGenContext::getmapad() { + ch = getmapad((const uint8 *)es.ptr(si, 5)); +} + +uint8 DreamGenContext::getmapad(const uint8 *setData) { + uint8 xad, yad; + if (getxad(setData, &xad) == 0) + return 0; + data.word(kObjectx) = xad; + if (getyad(setData, &yad) == 0) + return 0; + data.word(kObjecty) = yad; + return 1; +} + +void DreamGenContext::calcfrframe() { + const Frame *frame = (const Frame *)segRef(data.word(kFrsegment)).ptr(data.word(kCurrentframe) * sizeof(Frame), sizeof(Frame)); + data.word(kSavesource) = data.word(kFramesad) + frame->ptr(); + data.byte(kSavesize+0) = frame->width; + data.byte(kSavesize+1) = frame->height; + data.word(kOffsetx) = frame->x; + data.word(kOffsety) = frame->y; +} + +void DreamGenContext::finalframe() { + uint16 x, y; + finalframe(&x, &y); + di = x; + bx = y; +} + +void DreamGenContext::finalframe(uint16 *x, uint16 *y) { + data.byte(kSavex) = (data.word(kObjectx) + data.word(kOffsetx)) & 0xff; + data.byte(kSavey) = (data.word(kObjecty) + data.word(kOffsety)) & 0xff; + *x = data.word(kObjectx); + *y = data.word(kObjecty); +} + +void DreamGenContext::showallobs() { + data.word(kListpos) = kSetlist; + memset(segRef(data.word(kBuffers)).ptr(kSetlist, 0), 0xff, 128 * 5); + data.word(kFrsegment) = data.word(kSetframes); + data.word(kDataad) = kFramedata; + data.word(kFramesad) = kFrames; + + const Frame *frames = (const Frame *)segRef(data.word(kFrsegment)).ptr(0, 0); + ObjData *setEntries = (ObjData *)segRef(data.word(kSetdat)).ptr(0, 128 * sizeof(ObjData)); + for (size_t i = 0; i < 128; ++i) { + ObjData *setEntry = setEntries + i; + if (getmapad(setEntry->b58) == 0) + continue; + uint8 currentFrame = setEntry->b18[0]; + data.word(kCurrentframe) = currentFrame; + if (currentFrame == 0xff) + continue; + calcfrframe(); + uint16 x, y; + finalframe(&x, &y); + setEntry->b17 = setEntry->b18[0]; + if ((setEntry->type == 0) && (setEntry->priority != 5) && (setEntry->priority != 6)) { + x += data.word(kMapadx); + y += data.word(kMapady); + uint8 width, height; + showframe(frames, x, y, data.word(kCurrentframe), 0, &width, &height); + } else + makebackob(setEntry); + + ObjPos *objPos = (ObjPos *)segRef(data.word(kBuffers)).ptr(data.word(kListpos), sizeof(ObjPos)); + objPos->xMin = data.byte(kSavex); + objPos->yMin = data.byte(kSavey); + objPos->xMax = data.byte(kSavex) + data.byte(kSavesize+0); + objPos->yMax = data.byte(kSavey) + data.byte(kSavesize+1); + objPos->index = i; + data.word(kListpos) += sizeof(ObjPos); + } +} + +} /*namespace dreamgen */ + |