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engines/draci/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 "draci/screen.h"
+#include "draci/surface.h"
+
+namespace Draci {
+
+Surface::Surface(int width, int height) {
+	this->create(width, height, Graphics::PixelFormat::createFormatCLUT8());
+	this->markClean();
+	_transparentColor = kDefaultTransparent;
+}
+
+Surface::~Surface() {
+	this->free();
+}
+
+/**
+ * @brief Marks a dirty rectangle on the surface
+ * @param r The rectangle to be marked dirty
+ */
+void Surface::markDirtyRect(Common::Rect r) {
+	Common::List<Common::Rect>::iterator it;
+
+	r.clip(w, h);
+
+	if (r.isEmpty())
+		return;
+
+	it = _dirtyRects.begin();
+	while (it != _dirtyRects.end()) {
+		if (it->contains(r))
+			return;
+
+		if (r.contains(*it))
+			it = _dirtyRects.erase(it);
+		else
+			++it;
+	}
+
+	_dirtyRects.push_back(r);
+}
+
+/**
+ * @brief Marks the whole surface dirty
+ */
+void Surface::markDirty() {
+	_fullUpdate = true;
+}
+
+/**
+ * @brief Marks the whole surface clean
+ */
+void Surface::markClean() {
+	_fullUpdate = false;
+	_dirtyRects.clear();
+}
+
+/**
+ * @brief Fills the surface with the specified color
+ */
+void Surface::fill(uint color) {
+	byte *ptr = (byte *)getPixels();
+
+	memset(ptr, color, (uint)(w * h));
+}
+
+/**
+ * @brief Calculates horizontal center of an object
+ *
+ * @param x     The x coordinate of the center
+ * @param width The width of the object to be centered (in pixels)
+ *
+ * @return The centered x coordinate
+ */
+uint Surface::centerOnX(int x, int width) const {
+	int newX = x - width / 2;
+
+	if (newX + width > w)
+		newX = w - width;
+
+	if (newX < 0)
+		newX = 0;
+
+	return newX;
+}
+
+/**
+ * @brief Calculates vertical center of an object
+ *
+ * @param y      The y coordinate of the center
+ * @param height The height of the object to be centered (in pixels)
+ *
+ * @return The centered y coordinate
+ */
+uint Surface::putAboveY(int y, int height) const {
+	int newY = y - height;
+
+	if (newY + height > h)
+		newY = h - height;
+
+	if (newY < 0)
+		newY = 0;
+
+	return newY;
+}
+
+} // End of namespace Draci