Initial commit

engines/sword25/gfx/bitmap.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/>.
+ *
+ */
+
+/*
+ * This code is based on Broken Sword 2.5 engine
+ *
+ * Copyright (c) Malte Thiesen, Daniel Queteschiner and Michael Elsdoerfer
+ *
+ * Licensed under GNU GPL v2
+ *
+ */
+
+#include "sword25/gfx/bitmap.h"
+#include "sword25/kernel/outputpersistenceblock.h"
+#include "sword25/kernel/inputpersistenceblock.h"
+
+namespace Sword25 {
+
+Bitmap::Bitmap(RenderObjectPtr<RenderObject> parentPtr, TYPES type, uint handle) :
+	RenderObject(parentPtr, type, handle),
+	_modulationColor(BS_ARGBMASK),
+	_scaleFactorX(1.0f),
+	_scaleFactorY(1.0f),
+	_flipH(false),
+	_flipV(false) {
+}
+
+Bitmap::~Bitmap() {
+}
+
+void Bitmap::setAlpha(int alpha) {
+	if (!isAlphaAllowed()) {
+		warning("Tried to set alpha value on a bitmap that does not support alpha blending. Call was ignored.");
+		return;
+	}
+
+	if (alpha < 0 || alpha > 255) {
+		int oldAlpha = alpha;
+		if (alpha < 0)
+			alpha = 0;
+		if (alpha > 255)
+			alpha = 255;
+		warning("Tried to set an invalid alpha value (%d) on a bitmap. Value was changed to %d.", oldAlpha, alpha);
+
+		return;
+	}
+
+	uint newModulationColor = (_modulationColor & BS_RGBMASK) | alpha << BS_ASHIFT;
+	if (newModulationColor != _modulationColor) {
+		_modulationColor = newModulationColor;
+		forceRefresh();
+	}
+}
+
+void Bitmap::setModulationColor(uint modulationColor) {
+	if (!isColorModulationAllowed()) {
+		warning("Tried to set modulation color of a bitmap that does not support color modulation. Call was ignored.");
+		return;
+	}
+
+	uint newModulationColor = (modulationColor & BS_RGBMASK) | (_modulationColor & BS_AMASK);
+	if (newModulationColor != _modulationColor) {
+		_modulationColor = newModulationColor;
+		forceRefresh();
+	}
+}
+
+void Bitmap::setScaleFactor(float scaleFactor) {
+	setScaleFactorX(scaleFactor);
+	setScaleFactorY(scaleFactor);
+}
+
+void Bitmap::setScaleFactorX(float scaleFactorX) {
+	if (!isScalingAllowed()) {
+		warning("Tried to set scale factor of a bitmap that does not support scaling. Call was ignored.");
+		return;
+	}
+
+	if (scaleFactorX < 0) {
+		warning("Tried to set scale factor of a bitmap to a negative value. Call was ignored.");
+		return;
+	}
+
+	if (scaleFactorX != _scaleFactorX) {
+		_scaleFactorX = scaleFactorX;
+		_width = static_cast<int>(_originalWidth * _scaleFactorX);
+		if (_scaleFactorX <= 0.0f)
+			_scaleFactorX = 0.001f;
+		if (_width <= 0)
+			_width = 1;
+		forceRefresh();
+	}
+}
+
+void Bitmap::setScaleFactorY(float scaleFactorY) {
+	if (!isScalingAllowed()) {
+		warning("Tried to set scale factor of a bitmap that does not support scaling. Call was ignored.");
+		return;
+	}
+
+	if (scaleFactorY < 0) {
+		warning("Tried to set scale factor of a bitmap to a negative value. Call was ignored.");
+		return;
+	}
+
+	if (scaleFactorY != _scaleFactorY) {
+		_scaleFactorY = scaleFactorY;
+		_height = static_cast<int>(_originalHeight * scaleFactorY);
+		if (_scaleFactorY <= 0.0f)
+			_scaleFactorY = 0.001f;
+		if (_height <= 0)
+			_height = 1;
+		forceRefresh();
+	}
+}
+
+void Bitmap::setFlipH(bool flipH) {
+	_flipH = flipH;
+	forceRefresh();
+}
+
+void Bitmap::setFlipV(bool flipV) {
+	_flipV = flipV;
+	forceRefresh();
+}
+
+bool Bitmap::persist(OutputPersistenceBlock &writer) {
+	bool result = true;
+
+	result &= RenderObject::persist(writer);
+	writer.write(_flipH);
+	writer.write(_flipV);
+	writer.write(_scaleFactorX);
+	writer.write(_scaleFactorY);
+	writer.write(_modulationColor);
+	writer.write(_originalWidth);
+	writer.write(_originalHeight);
+
+	return result;
+}
+
+bool Bitmap::unpersist(InputPersistenceBlock &reader) {
+	bool result = true;
+
+	result &= RenderObject::unpersist(reader);
+	reader.read(_flipH);
+	reader.read(_flipV);
+	reader.read(_scaleFactorX);
+	reader.read(_scaleFactorY);
+	reader.read(_modulationColor);
+	reader.read(_originalWidth);
+	reader.read(_originalHeight);
+
+	forceRefresh();
+
+	return reader.isGood() && result;
+}
+
+} // End of namespace Sword25