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// Copyright 2009 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <array>
#include <cstddef>
#include "Common/CommonTypes.h"
#include "VideoBackends/Software/Vec3.h"
struct Vec4
{
float x;
float y;
float z;
float w;
};
struct InputVertexData
{
u8 posMtx;
std::array<u8, 8> texMtx;
Vec3 position;
std::array<Vec3, 3> normal;
std::array<std::array<u8, 4>, 2> color;
std::array<std::array<float, 2>, 8> texCoords;
};
struct OutputVertexData
{
// components in color channels
enum
{
RED_C,
GRN_C,
BLU_C,
ALP_C
};
Vec3 mvPosition = {};
Vec4 projectedPosition = {};
Vec3 screenPosition = {};
std::array<Vec3, 3> normal{};
std::array<std::array<u8, 4>, 2> color{};
std::array<Vec3, 8> texCoords{};
void Lerp(float t, const OutputVertexData* a, const OutputVertexData* b)
{
#define LINTERP(T, OUT, IN) (OUT) + ((IN - OUT) * T)
#define LINTERP_INT(T, OUT, IN) (OUT) + (((IN - OUT) * T) >> 8)
mvPosition = LINTERP(t, a->mvPosition, b->mvPosition);
projectedPosition.x = LINTERP(t, a->projectedPosition.x, b->projectedPosition.x);
projectedPosition.y = LINTERP(t, a->projectedPosition.y, b->projectedPosition.y);
projectedPosition.z = LINTERP(t, a->projectedPosition.z, b->projectedPosition.z);
projectedPosition.w = LINTERP(t, a->projectedPosition.w, b->projectedPosition.w);
for (std::size_t i = 0; i < normal.size(); ++i)
{
normal[i] = LINTERP(t, a->normal[i], b->normal[i]);
}
const u16 t_int = static_cast<u16>(t * 256);
for (std::size_t i = 0; i < color[0].size(); ++i)
{
color[0][i] = LINTERP_INT(t_int, a->color[0][i], b->color[0][i]);
color[1][i] = LINTERP_INT(t_int, a->color[1][i], b->color[1][i]);
}
for (std::size_t i = 0; i < texCoords.size(); ++i)
{
texCoords[i] = LINTERP(t, a->texCoords[i], b->texCoords[i]);
}
#undef LINTERP
#undef LINTERP_INT
}
};
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