triangle_converter.hpp

/* Copyright (c) 2020 Themaister
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#pragma once

#include "primitive_setup.hpp"

namespace RDP
{
struct Vertex
{
	union
	{
		struct
		{
			float x;
			float y;
			float z;
			float w;
		};
		float clip[4];
	};

	float u;
	float v;
	float color[4];
};

struct InputPrimitive
{
	Vertex vertices[3];
};

enum class CullMode
{
	None,
	CCWOnly,
	CWOnly
};

struct ViewportTransform
{
	float x;
	float y;
	float width;
	float height;
	float min_depth;
	float max_depth;
};

unsigned setup_clipped_triangles(PrimitiveSetup prim[8], const InputPrimitive &input, CullMode mode, const ViewportTransform &vp);
}