1 files changed, 300 insertions, 0 deletions
diff --git a/engines/sherlock/surface.cpp b/engines/sherlock/surface.cpp
new file mode 100644
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--- /dev/null
+++ b/engines/sherlock/surface.cpp
@@ -0,0 +1,300 @@
+/* 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 "sherlock/surface.h"
+#include "sherlock/sherlock.h"
+#include "sherlock/resources.h"
+#include "common/system.h"
+#include "graphics/palette.h"
+
+namespace Sherlock {
+
+Surface::Surface(uint16 width, uint16 height) : Fonts(), _freePixels(true) {
+	create(width, height);
+}
+
+Surface::Surface() : Fonts(), _freePixels(false) {
+}
+
+Surface::~Surface() {
+	if (_freePixels)
+		_surface.free();
+}
+
+void Surface::create(uint16 width, uint16 height) {
+	if (_freePixels)
+		_surface.free();
+
+	if (_vm->getPlatform() == Common::kPlatform3DO) {
+		_surface.create(width, height, Graphics::PixelFormat(2, 5, 6, 5, 0, 11, 5, 0, 0));
+	} else {
+		_surface.create(width, height, Graphics::PixelFormat::createFormatCLUT8());
+	}
+	_freePixels = true;
+}
+
+Graphics::PixelFormat Surface::getPixelFormat() {
+	return _surface.format;
+}
+
+void Surface::blitFrom(const Surface &src) {
+	blitFrom(src, Common::Point(0, 0));
+}
+
+void Surface::blitFrom(const ImageFrame &src) {
+	blitFrom(src._frame, Common::Point(0, 0));
+}
+
+void Surface::blitFrom(const Graphics::Surface &src) {
+	blitFrom(src, Common::Point(0, 0));
+}
+
+void Surface::blitFrom(const Surface &src, const Common::Point &pt) {
+	blitFrom(src, pt, Common::Rect(0, 0, src._surface.w, src._surface.h));
+}
+
+void Surface::blitFrom(const ImageFrame &src, const Common::Point &pt) {
+	blitFrom(src._frame, pt, Common::Rect(0, 0, src._frame.w, src._frame.h));
+}
+
+void Surface::blitFrom(const Graphics::Surface &src, const Common::Point &pt) {
+	blitFrom(src, pt, Common::Rect(0, 0, src.w, src.h));
+}
+
+void Surface::blitFrom(const Graphics::Surface &src, const Common::Point &pt, const Common::Rect &srcBounds) {
+	Common::Rect srcRect = srcBounds;
+	Common::Rect destRect(pt.x, pt.y, pt.x + srcRect.width(), pt.y + srcRect.height());
+
+	if (srcRect.isValidRect() && clip(srcRect, destRect)) {
+		// Surface is at least partially or completely on-screen
+		addDirtyRect(destRect);
+		_surface.copyRectToSurface(src, destRect.left, destRect.top, srcRect);
+	}
+}
+
+void Surface::blitFrom(const ImageFrame &src, const Common::Point &pt, const Common::Rect &srcBounds) {
+	blitFrom(src._frame, pt, srcBounds);
+}
+
+void Surface::blitFrom(const Surface &src, const Common::Point &pt, const Common::Rect &srcBounds) {
+	blitFrom(src._surface, pt, srcBounds);
+}
+
+void Surface::transBlitFrom(const ImageFrame &src, const Common::Point &pt,
+		bool flipped, int overrideColor, int scaleVal) {
+	transBlitFrom(src._frame, pt + src._offset, flipped, overrideColor, scaleVal);
+}
+
+void Surface::transBlitFrom(const Surface &src, const Common::Point &pt,
+		bool flipped, int overrideColor, int scaleVal) {
+	const Graphics::Surface &s = src._surface;
+	transBlitFrom(s, pt, flipped, overrideColor, scaleVal);
+}
+
+void Surface::transBlitFrom(const Graphics::Surface &src, const Common::Point &pt,
+		bool flipped, int overrideColor, int scaleVal) {
+	if (scaleVal == 256) {
+		transBlitFromUnscaled(src, pt, flipped, overrideColor);
+		return;
+	}
+
+	int scaleX = SCALE_THRESHOLD * SCALE_THRESHOLD / scaleVal;
+	int scaleY = scaleX;
+	int scaleXCtr = 0, scaleYCtr = 0;
+
+	for (int yCtr = 0, destY = pt.y; yCtr < src.h && destY < this->h(); ++yCtr) {
+		// Handle skipping lines if Y scaling
+		scaleYCtr += scaleY;
+		
+		while (scaleYCtr >= SCALE_THRESHOLD && destY < this->h()) {
+			scaleYCtr -= SCALE_THRESHOLD;
+
+			if (destY >= 0) {
+				// Handle drawing the line
+				const byte *pSrc = (const byte *)src.getBasePtr(flipped ? src.w - 1 : 0, yCtr);
+				byte *pDest = (byte *)getBasePtr(pt.x, destY);
+				scaleXCtr = 0;
+
+				for (int xCtr = 0, destX = pt.x; xCtr < src.w && destX < this->w(); ++xCtr) {
+					// Handle horizontal scaling
+					scaleXCtr += scaleX;
+
+					while (scaleXCtr >= SCALE_THRESHOLD && destX < this->w()) {
+						scaleXCtr -= SCALE_THRESHOLD;
+
+						// Only handle on-screen pixels
+						if (destX >= 0 && *pSrc != TRANSPARENCY)
+							*pDest = *pSrc;
+
+						++pDest;
+						++destX;
+					}
+
+					pSrc = pSrc + (flipped ? -1 : 1);
+				}
+			}
+
+			++destY;
+		}
+	}
+}
+
+void Surface::transBlitFromUnscaled(const Graphics::Surface &src, const Common::Point &pt,
+		bool flipped, int overrideColor) {
+	Common::Rect drawRect(0, 0, src.w, src.h);
+	Common::Rect destRect(pt.x, pt.y, pt.x + src.w, pt.y + src.h);
+
+	// Clip the display area to on-screen
+	if (!clip(drawRect, destRect))
+		// It's completely off-screen
+		return;
+
+	if (flipped)
+		drawRect = Common::Rect(src.w - drawRect.right, src.h - drawRect.bottom,
+			src.w - drawRect.left, src.h - drawRect.top);
+
+	Common::Point destPt(destRect.left, destRect.top);
+	addDirtyRect(Common::Rect(destPt.x, destPt.y, destPt.x + drawRect.width(),
+		destPt.y + drawRect.height()));
+
+	switch (src.format.bytesPerPixel) {
+	case 1:
+		// 8-bit palettized: Draw loop
+		assert(_surface.format.bytesPerPixel == 1); // Security check
+		for (int yp = 0; yp < drawRect.height(); ++yp) {
+			const byte *srcP = (const byte *)src.getBasePtr(
+				flipped ? drawRect.right - 1 : drawRect.left, drawRect.top + yp);
+			byte *destP = (byte *)getBasePtr(destPt.x, destPt.y + yp);
+
+			for (int xp = 0; xp < drawRect.width(); ++xp, ++destP) {
+				if (*srcP != TRANSPARENCY)
+					*destP = overrideColor ? overrideColor : *srcP;
+
+				srcP = flipped ? srcP - 1 : srcP + 1;
+			}
+		}
+		break;
+	case 2:
+		// 3DO 15-bit RGB565: Draw loop
+		assert(_surface.format.bytesPerPixel == 2); // Security check
+		for (int yp = 0; yp < drawRect.height(); ++yp) {
+			const uint16 *srcP = (const uint16 *)src.getBasePtr(
+				flipped ? drawRect.right - 1 : drawRect.left, drawRect.top + yp);
+			uint16 *destP = (uint16 *)getBasePtr(destPt.x, destPt.y + yp);
+
+			for (int xp = 0; xp < drawRect.width(); ++xp, ++destP) {
+				if (*srcP) // RGB 0, 0, 0 -> transparent on 3DO
+					*destP = *srcP; // overrideColor ? overrideColor : *srcP;
+
+				srcP = flipped ? srcP - 1 : srcP + 1;
+			}
+		}
+		break;
+	default:
+		error("Surface: unsupported bytesperpixel");
+		break;
+	}
+}
+
+void Surface::fillRect(int x1, int y1, int x2, int y2, byte color) {
+	fillRect(Common::Rect(x1, y1, x2, y2), color);
+}
+
+void Surface::fillRect(const Common::Rect &r, byte color) {
+	_surface.fillRect(r, color);
+	addDirtyRect(r);
+}
+
+void Surface::fill(uint16 color) {
+	_surface.fillRect(Common::Rect(_surface.w, _surface.h), color);
+}
+
+bool Surface::clip(Common::Rect &srcBounds, Common::Rect &destBounds) {
+	if (destBounds.left >= _surface.w || destBounds.top >= _surface.h ||
+			destBounds.right <= 0 || destBounds.bottom <= 0)
+		return false;
+
+	// Clip the bounds if necessary to fit on-screen
+	if (destBounds.right > _surface.w) {
+		srcBounds.right -= destBounds.right - _surface.w;
+		destBounds.right = _surface.w;
+	}
+
+	if (destBounds.bottom > _surface.h) {
+		srcBounds.bottom -= destBounds.bottom - _surface.h;
+		destBounds.bottom = _surface.h;
+	}
+
+	if (destBounds.top < 0) {
+		srcBounds.top += -destBounds.top;
+		destBounds.top = 0;
+	}
+
+	if (destBounds.left < 0) {
+		srcBounds.left += -destBounds.left;
+		destBounds.left = 0;
+	}
+
+	return true;
+}
+
+void Surface::clear() {
+	fillRect(Common::Rect(0, 0, _surface.w, _surface.h), 0);
+}
+
+void Surface::free() {
+	if (_freePixels) {
+		_surface.free();
+		_freePixels = false;
+	}
+}
+
+void Surface::setPixels(byte *pixels, int width, int height, Graphics::PixelFormat pixelFormat) {
+	_surface.format = pixelFormat;
+	_surface.w = width;
+	_surface.h = height;
+	_surface.pitch = width * pixelFormat.bytesPerPixel;
+	_surface.setPixels(pixels);
+}
+
+void Surface::writeString(const Common::String &str, const Common::Point &pt, byte overrideColor) {
+	Fonts::writeString(this, str, pt, overrideColor);
+}
+
+void Surface::writeFancyString(const Common::String &str, const Common::Point &pt, byte overrideColor1, byte overrideColor2) {
+	writeString(str, Common::Point(pt.x, pt.y), overrideColor1);
+	writeString(str, Common::Point(pt.x + 1, pt.y), overrideColor1);
+	writeString(str, Common::Point(pt.x + 2, pt.y), overrideColor1);
+	writeString(str, Common::Point(pt.x, pt.y + 1), overrideColor1);
+	writeString(str, Common::Point(pt.x + 2, pt.y + 1), overrideColor1);
+	writeString(str, Common::Point(pt.x, pt.y + 2), overrideColor1);
+	writeString(str, Common::Point(pt.x + 1, pt.y + 2), overrideColor1);
+	writeString(str, Common::Point(pt.x + 2, pt.y + 2), overrideColor1);
+	writeString(str, Common::Point(pt.x + 1, pt.y + 1), overrideColor2);
+}
+
+void Surface::maskArea(const ImageFrame &src, const Common::Point &pt, int scrollX) {
+	// TODO
+	error("TODO: maskArea");
+}
+
+} // End of namespace Sherlock