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Diffstat (limited to 'engines/access/asurface.cpp')
-rw-r--r-- | engines/access/asurface.cpp | 346 |
1 files changed, 346 insertions, 0 deletions
diff --git a/engines/access/asurface.cpp b/engines/access/asurface.cpp new file mode 100644 index 0000000000..5f4372d5af --- /dev/null +++ b/engines/access/asurface.cpp @@ -0,0 +1,346 @@ +/* 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 "common/algorithm.h" +#include "common/endian.h" +#include "common/memstream.h" +#include "access/access.h" +#include "access/asurface.h" + +namespace Access { + +SpriteResource::SpriteResource(AccessEngine *vm, Resource *res) { + Common::Array<uint32> offsets; + int count = res->_stream->readUint16LE(); + + for (int i = 0; i < count; i++) + offsets.push_back(res->_stream->readUint32LE()); + offsets.push_back(res->_size); // For easier calculations of Noctropolis sizes + + // Build up the frames + for (int i = 0; i < count; ++i) { + res->_stream->seek(offsets[i]); + int frameSize = offsets[i + 1] - offsets[i]; + + SpriteFrame *frame = new SpriteFrame(vm, res->_stream, frameSize); + _frames.push_back(frame); + } +} + +SpriteResource::~SpriteResource() { + for (uint i = 0; i < _frames.size(); ++i) + delete _frames[i]; +} + +SpriteFrame::SpriteFrame(AccessEngine *vm, Common::SeekableReadStream *stream, int frameSize) { + int xSize = stream->readUint16LE(); + int ySize = stream->readUint16LE(); + create(xSize, ySize); + + // Empty surface + byte *data = (byte *)getPixels(); + Common::fill(data, data + w * h, 0); + + // Decode the data + for (int y = 0; y < h; ++y) { + int offset = stream->readByte(); + int len = stream->readByte(); + assert((offset + len) <= w); + + byte *destP = (byte *)getBasePtr(offset, y); + stream->read(destP, len); + } +} + +SpriteFrame::~SpriteFrame() { + free(); +} + +/*------------------------------------------------------------------------*/ + +ImageEntry::ImageEntry() { + _frameNumber = 0; + _spritesPtr = nullptr; + _offsetY = 0; + _flags = 0; +} + +/*------------------------------------------------------------------------*/ + +static bool sortImagesY(const ImageEntry &ie1, const ImageEntry &ie2) { + int v = (ie1._position.y + ie1._offsetY) - (ie2._position.y + ie2._offsetY); + return (v < 0) || (v == 0 && ie1._position.y <= ie2._position.y); +} + +void ImageEntryList::addToList(ImageEntry &ie) { + assert(size() < 35); + push_back(ie); + Common::sort(begin(), end(), sortImagesY); +} + +/*------------------------------------------------------------------------*/ + +int ASurface::_clipWidth; +int ASurface::_clipHeight; + +ASurface::ASurface(): Graphics::Surface() { + _leftSkip = _rightSkip = 0; + _topSkip = _bottomSkip = 0; + _lastBoundsX = _lastBoundsY = 0; + _lastBoundsW = _lastBoundsH = 0; + _orgX1 = _orgY1 = 0; + _orgX2 = _orgY2 = 0; + _lColor = 0; + _maxChars = 0; +} + +ASurface::~ASurface() { + free(); + _savedBlock.free(); +} + +void ASurface::create(uint16 width, uint16 height) { + Graphics::Surface::create(width, height, Graphics::PixelFormat::createFormatCLUT8()); +} + +void ASurface::clearBuffer() { + byte *pSrc = (byte *)getPixels(); + Common::fill(pSrc, pSrc + w * h, 0); +} + +bool ASurface::clip(Common::Rect &r) { + int skip; + _leftSkip = _rightSkip = 0; + _topSkip = _bottomSkip = 0; + + if (r.left > _clipWidth || r.left < 0) { + if (r.left >= 0) + return true; + + skip = -r.left; + r.setWidth(r.width() - skip); + _leftSkip = skip; + r.moveTo(0, r.top); + } + + int right = r.right - 1; + if (right < 0) + return true; + else if (right > _clipWidth) { + skip = right - _clipWidth; + r.setWidth(r.width() - skip); + _rightSkip = skip; + } + + if (r.top > _clipHeight || r.top < 0) { + if (r.top >= 0) + return true; + + skip = -r.top; + r.setHeight(r.height() - skip); + _topSkip = skip; + r.moveTo(r.left, 0); + } + + int bottom = r.bottom - 1; + if (bottom < 0) + return true; + else if (bottom > _clipHeight) { + skip = bottom - _clipHeight; + _bottomSkip = skip; + r.setHeight(r.height() - skip); + } + + return false; +} + +void ASurface::plotImage(SpriteResource *sprite, int frameNum, const Common::Point &pt) { + SpriteFrame *frame = sprite->getFrame(frameNum); + Common::Rect r(pt.x, pt.y, pt.x + frame->w, pt.y + frame->h); + + if (!clip(r)) { + _lastBoundsX = r.left; + _lastBoundsY = r.top; + _lastBoundsW = r.width(); + _lastBoundsH = r.height(); + + plotF(frame, pt); + } +} + +void ASurface::transBlitFrom(ASurface *src, const Common::Point &destPos) { + if (getPixels() == nullptr) + create(w, h); + + for (int yp = 0; yp < src->h; ++yp) { + const byte *srcP = (const byte *)src->getBasePtr(0, yp); + byte *destP = (byte *)getBasePtr(destPos.x, destPos.y + yp); + + for (int xp = 0; xp < this->w; ++xp, ++srcP, ++destP) { + if (*srcP != 0) + *destP = *srcP; + } + } +} + +void ASurface::transBlitFrom(ASurface *src, const Common::Rect &bounds) { + const int SCALE_LIMIT = 0x100; + int scaleX = SCALE_LIMIT * bounds.width() / src->w; + int scaleY = SCALE_LIMIT * bounds.height() / src->h; + int scaleXCtr = 0, scaleYCtr = 0; + + for (int yCtr = 0, destY = bounds.top; yCtr < src->h; ++yCtr) { + // Handle skipping lines if Y scaling + scaleYCtr += scaleY; + if (scaleYCtr < SCALE_LIMIT) + continue; + scaleYCtr -= SCALE_LIMIT; + + // Handle off-screen lines + if (destY >= this->h) + break; + + if (destY >= 0) { + // Handle drawing the line + const byte *pSrc = (const byte *)src->getBasePtr(0, yCtr); + byte *pDest = (byte *)getBasePtr(bounds.left, destY); + scaleXCtr = 0; + int x = bounds.left; + + for (int xCtr = 0; xCtr < src->w; ++xCtr, ++pSrc) { + // Handle horizontal scaling + scaleXCtr += scaleX; + if (scaleXCtr < SCALE_LIMIT) + continue; + scaleXCtr -= SCALE_LIMIT; + + // Only handle on-screen pixels + if (x >= this->w) + break; + if (x >= 0 && *pSrc != 0) + *pDest = *pSrc; + + ++pDest; + ++x; + } + } + + ++destY; + } +} + +void ASurface::transBlitFrom(ASurface &src) { + blitFrom(src); +} + +void ASurface::blitFrom(Graphics::Surface &src) { + assert(w >= src.w && h >= src.h); + for (int y = 0; y < src.h; ++y) { + const byte *srcP = (const byte *)src.getBasePtr(0, y); + byte *destP = (byte *)getBasePtr(0, y); + Common::copy(srcP, srcP + src.w, destP); + } +} + +void ASurface::copyBuffer(Graphics::Surface *src) { + blitFrom(*src); +} + +void ASurface::plotF(SpriteFrame *frame, const Common::Point &pt) { + sPlotF(frame, Common::Rect(pt.x, pt.y, pt.x + frame->w, pt.y + frame->h)); +} + +void ASurface::plotB(SpriteFrame *frame, const Common::Point &pt) { + sPlotB(frame, Common::Rect(pt.x, pt.y, pt.x + frame->w, pt.y + frame->h)); +} + +void ASurface::sPlotF(SpriteFrame *frame, const Common::Rect &bounds) { + transBlitFrom(frame, bounds); +} + +void ASurface::sPlotB(SpriteFrame *frame, const Common::Rect &bounds) { + ASurface flippedFrame; + frame->flipHorizontal(flippedFrame); + + transBlitFrom(&flippedFrame, bounds); +} + +void ASurface::copyBlock(ASurface *src, const Common::Rect &bounds) { + copyRectToSurface(*src, bounds.left, bounds.top, bounds); +} + +void ASurface::saveBlock(const Common::Rect &bounds) { + _savedBounds = bounds; + _savedBounds.clip(Common::Rect(0, 0, this->w, this->h)); + + _savedBlock.free(); + _savedBlock.create(bounds.width(), bounds.height(), + Graphics::PixelFormat::createFormatCLUT8()); + _savedBlock.copyRectToSurface(*this, 0, 0, _savedBounds); +} + +void ASurface::restoreBlock() { + if (!_savedBounds.isEmpty()) { + copyRectToSurface(_savedBlock, _savedBounds.left, _savedBounds.top, + Common::Rect(0, 0, _savedBlock.w, _savedBlock.h)); + + _savedBlock.free(); + _savedBounds = Common::Rect(0, 0, 0, 0); + } +} + +void ASurface::drawRect() { + Graphics::Surface::fillRect(Common::Rect(_orgX1, _orgY1, _orgX2, _orgY2), _lColor); +} + +void ASurface::flipHorizontal(ASurface &dest) { + dest.create(this->w, this->h); + for (int y = 0; y < h; ++y) { + const byte *pSrc = (const byte *)getBasePtr(this->w - 1, y); + byte *pDest = (byte *)dest.getBasePtr(0, y); + + for (int x = 0; x < w; ++x, --pSrc, ++pDest) + *pDest = *pSrc; + } +} + +void ASurface::moveBufferLeft() { + byte *p = (byte *)getPixels(); + Common::copy(p + TILE_WIDTH, p + (w * h), p); +} + +void ASurface::moveBufferRight() { + byte *p = (byte *)getPixels(); + Common::copy_backward(p, p + (pitch * h) - TILE_WIDTH, p + (pitch * h)); +} + +void ASurface::moveBufferUp() { + byte *p = (byte *)getPixels(); + Common::copy(p + (pitch * TILE_HEIGHT), p + (pitch * h), p); +} + +void ASurface::moveBufferDown() { + byte *p = (byte *)getPixels(); + Common::copy_backward(p, p + (pitch * (h - TILE_HEIGHT)), p + (pitch * h)); +} + +} // End of namespace Access |