File: ags_blend.h

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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
 * 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/>.
 *
 */

#ifndef AGS_PLUGINS_AGS_BLEND_AGS_BLEND_H
#define AGS_PLUGINS_AGS_BLEND_AGS_BLEND_H

#include "ags/plugins/ags_plugin.h"

namespace AGS3 {
namespace Plugins {
namespace AGSBlend {

/**
 * Author: Steven Poulton
 * Description: An AGS Plugin to allow true Alpha Blending
 */
class AGSBlend : public PluginBase {
	SCRIPT_HASH(AGSBlend)
private:
	/**
	 * Gets the alpha value at coords x,y
	 */
	void GetAlpha(ScriptMethodParams &params);

	/**
	 * Sets the alpha value at coords x,y
	 */
	void PutAlpha(ScriptMethodParams &params);

	/**
	 * Translates index from a 2D array to a 1D array
	 */
	int xytolocale(int x, int y, int width);

	void HighPass(ScriptMethodParams &params);
	void Blur(ScriptMethodParams &params);
	void DrawSprite(ScriptMethodParams &params);
	void DrawAdd(ScriptMethodParams &params);
	void DrawAlpha(ScriptMethodParams &params);

public:
	AGSBlend() : PluginBase() {}
	virtual ~AGSBlend() {}

	const char *AGS_GetPluginName() override;
	void AGS_EngineStartup(IAGSEngine *lpEngine) override;
};

} // namespace AGSBlend
} // namespace Plugins
} // namespace AGS3

#endif