/* 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 "common/scummsys.h"

#if defined(USE_OPENGL_SHADERS)

namespace OpenGL {
namespace BuiltinShaders {

const char *controlVertex =
	"#version 100\n"
	"attribute vec2 position;\n"
	"attribute vec2 texcoord;\n"
	"uniform vec2 offsetXY;\n"
	"uniform vec2 sizeWH;\n"
	"uniform vec4 clip;\n"
	"uniform bool flipY;\n"
	"varying vec2 Texcoord;\n"
	"void main() {\n"
		"Texcoord = clip.xy + texcoord * (clip.zw - clip.xy);\n"
		"vec2 pos = offsetXY + position * sizeWH;\n"
		"pos.x = pos.x * 2.0 - 1.0;\n"
		"pos.y = pos.y * 2.0 - 1.0;\n"
		"if (flipY)\n"
			"pos.y *= -1.0;\n"
		"gl_Position = vec4(pos, 0.0, 1.0);\n"
	"}\n";

const char *controlFragment =
	"#version 100\n"
	"#ifdef GL_FRAGMENT_PRECISION_HIGH\n"
		"precision highp float;\n"
	"#else\n"
		"precision mediump float;\n"
	"#endif\n"
	"varying vec2 Texcoord;\n"
	"uniform sampler2D tex;\n"
	"void main() {\n"
		"gl_FragColor = texture2D(tex, Texcoord);\n"
	"}\n";

}
} // End of namespace OpenGL

#endif