Initial commit

engines/teenagent/surface.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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "teenagent/surface.h"
+#include "teenagent/pack.h"
+#include "teenagent/teenagent.h"
+
+#include "common/stream.h"
+#include "common/debug.h"
+
+namespace TeenAgent {
+
+Surface::Surface() : x(0), y(0) {
+}
+
+Surface::~Surface() {
+	free();
+}
+
+void Surface::load(Common::SeekableReadStream &stream, Type type) {
+	debugC(0, kDebugSurface, "load()");
+	free();
+
+	x = y = 0;
+
+	uint16 w_ = stream.readUint16LE();
+	uint16 h_ = stream.readUint16LE();
+
+	if (type != kTypeLan) {
+		uint16 pos = stream.readUint16LE();
+		x = pos % kScreenWidth;
+		y = pos / kScreenWidth;
+	}
+
+	debugC(0, kDebugSurface, "declared info: %ux%u (%04xx%04x) -> %u,%u", w_, h_, w_, h_, x, y);
+	if (stream.eos() || w_ == 0)
+		return;
+
+	if (w_ * h_ > stream.size()) {
+		debugC(0, kDebugSurface, "invalid surface %ux%u -> %u,%u", w_, h_, x, y);
+		return;
+	}
+
+	debugC(0, kDebugSurface, "creating surface %ux%u -> %u,%u", w_, h_, x, y);
+	create(w_, h_, Graphics::PixelFormat::createFormatCLUT8());
+
+	stream.read(pixels, w_ * h_);
+}
+
+Common::Rect Surface::render(Graphics::Surface *surface, int dx, int dy, bool mirror, Common::Rect srcRect, uint zoom) const {
+	if (srcRect.isEmpty()) {
+		srcRect = Common::Rect(0, 0, w, h);
+	}
+	Common::Rect dstRect(x + dx, y + dy, x + dx + zoom * srcRect.width() / 256, y + dy + zoom * srcRect.height() / 256);
+	if (dstRect.left < 0) {
+		srcRect.left = -dstRect.left;
+		dstRect.left = 0;
+	}
+	if (dstRect.right > surface->w) {
+		srcRect.right -= dstRect.right - surface->w;
+		dstRect.right = surface->w;
+	}
+	if (dstRect.top < 0) {
+		srcRect.top -= dstRect.top;
+		dstRect.top = 0;
+	}
+	if (dstRect.bottom > surface->h) {
+		srcRect.bottom -= dstRect.bottom - surface->h;
+		dstRect.bottom = surface->h;
+	}
+	if (srcRect.isEmpty() || dstRect.isEmpty())
+		return Common::Rect();
+
+	if (zoom == 256) {
+		const byte *src = (const byte *)getBasePtr(0, srcRect.top);
+		byte *dstBase = (byte *)surface->getBasePtr(dstRect.left, dstRect.top);
+
+		for (int i = srcRect.top; i < srcRect.bottom; ++i) {
+			byte *dst = dstBase;
+			for (int j = srcRect.left; j < srcRect.right; ++j) {
+				byte p = src[(mirror ? w - j - 1 : j)];
+				if (p != 0xff)
+					*dst++ = p;
+				else
+					++dst;
+			}
+			dstBase += surface->pitch;
+			src += pitch;
+		}
+	} else {
+		byte *dst = (byte *)surface->getBasePtr(dstRect.left, dstRect.top);
+		for (int i = 0; i < dstRect.height(); ++i) {
+			for (int j = 0; j < dstRect.width(); ++j) {
+				int px = j * 256 / zoom;
+				const byte *src = (const byte *)getBasePtr(srcRect.left + (mirror ? w - px - 1 : px), srcRect.top + i * 256 / zoom);
+				byte p = *src;
+				if (p != 0xff)
+					dst[j] = p;
+			}
+			dst += surface->pitch;
+		}
+	}
+	return dstRect;
+}
+
+} // End of namespace TeenAgent