dolphin/Source/Core/VideoBackends/Software/NativeVertexFormat.h

81 lines
1.7 KiB
C

// Copyright 2009 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#pragma once
#include "Common/ChunkFile.h"
#include "VideoBackends/Software/Vec3.h"
struct Vec4
{
float x;
float y;
float z;
float w;
};
struct InputVertexData
{
u8 posMtx;
u8 texMtx[8];
Vec3 position;
Vec3 normal[3];
u8 color[2][4];
float texCoords[8][2];
};
struct OutputVertexData
{
// components in color channels
enum
{
RED_C,
GRN_C,
BLU_C,
ALP_C
};
Vec3 mvPosition = {};
Vec4 projectedPosition = {};
Vec3 screenPosition = {};
Vec3 normal[3] = {};
u8 color[2][4] = {};
Vec3 texCoords[8] = {};
void Lerp(float t, OutputVertexData* a, 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 (int i = 0; i < 3; ++i)
{
normal[i] = LINTERP(t, a->normal[i], b->normal[i]);
}
u16 t_int = (u16)(t * 256);
for (int i = 0; i < 4; ++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 (int i = 0; i < 8; ++i)
{
texCoords[i] = LINTERP(t, a->texCoords[i], b->texCoords[i]);
}
#undef LINTERP
#undef LINTERP_INT
}
};