1 files changed, 346 insertions, 0 deletions
diff --git a/engines/access/asurface.cpp b/engines/access/asurface.cpp
new file mode 100644
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--- /dev/null
+++ b/engines/access/asurface.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.
+ *
+ */
+
+#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