// Project64 - A Nintendo 64 emulator
// http://www.pj64-emu.com/
// Copyright(C) 2001-2021 Project64
// Copyright(C) 2003-2009 Sergey 'Gonetz' Lipski
// Copyright(C) 2002 Dave2001
// GNU/GPLv2 licensed: https://gnu.org/licenses/gpl-2.0.html

static inline void load8bCI(uint8_t *src, uint8_t *dst, int wid_64, int height, int line, int ext, uint16_t *pal)
{
    uint8_t *v7;
    uint32_t *v8;
    int v9;
    int v10;
    int v11;
    uint32_t v12;
    uint32_t *v13;
    uint32_t v14;
    uint32_t *v15;
    uint32_t v16;
    uint32_t *v17;
    uint32_t *v18;
    int v19;
    int v20;
    uint32_t v21;
    uint32_t v22;
    uint32_t *v23;
    uint32_t v24;
    int v25;
    int v26;

    v7 = src;
    v8 = (uint32_t *)dst;
    v9 = height;
    do
    {
        v25 = v9;
        v10 = wid_64;
        do
        {
            v11 = v10;
            v12 = bswap32(*(uint32_t *)v7);
            v13 = (uint32_t *)(v7 + 4);
            ALOWORD(v10) = __ROR__(*(uint16_t *)((char *)pal + ((v12 >> 15) & 0x1FE)), 1);
            v14 = v10 << 16;
            ALOWORD(v14) = __ROR__(*(uint16_t *)((char *)pal + ((v12 >> 23) & 0x1FE)), 1);
            *v8 = v14;
            v15 = v8 + 1;
            ALOWORD(v14) = __ROR__(*(uint16_t *)((char *)pal + (2 * (uint16_t)(v12 & 0xFFFF) & 0x1FE)), 1);
            v14 <<= 16;
            ALOWORD(v14) = __ROR__(*(uint16_t *)((char *)pal + ((v12 >> 7) & 0x1FE)), 1);
            *v15 = v14;
            ++v15;
            v16 = bswap32(*v13);
            v7 = (uint8_t *)(v13 + 1);
            ALOWORD(v14) = __ROR__(*(uint16_t *)((char *)pal + ((v16 >> 15) & 0x1FE)), 1);
            v14 <<= 16;
            ALOWORD(v14) = __ROR__(*(uint16_t *)((char *)pal + ((v16 >> 23) & 0x1FE)), 1);
            *v15 = v14;
            ++v15;
            ALOWORD(v14) = __ROR__(*(uint16_t *)((char *)pal + (2 * (uint16_t)(v16 & 0xFFFF) & 0x1FE)), 1);
            v14 <<= 16;
            ALOWORD(v14) = __ROR__(*(uint16_t *)((char *)pal + ((v16 >> 7) & 0x1FE)), 1);
            *v15 = v14;
            v8 = v15 + 1;
            v10 = v11 - 1;
        } while (v11 != 1);
        if (v25 == 1)
            break;
        v26 = v25 - 1;
        v17 = (uint32_t *)&src[(line + (uintptr_t)v7 - (uintptr_t)src) & 0x7FF];
        v18 = (uint32_t *)((char *)v8 + ext);
        v19 = wid_64;
        do
        {
            v20 = v19;
            v21 = bswap32(v17[1]);
            ALOWORD(v19) = __ROR__(*(uint16_t *)((char *)pal + ((v21 >> 15) & 0x1FE)), 1);
            v22 = v19 << 16;
            ALOWORD(v22) = __ROR__(*(uint16_t *)((char *)pal + ((v21 >> 23) & 0x1FE)), 1);
            *v18 = v22;
            v23 = v18 + 1;
            ALOWORD(v22) = __ROR__(*(uint16_t *)((char *)pal + (2 * (uint16_t)(v21 & 0xFFFF) & 0x1FE)), 1);
            v22 <<= 16;
            ALOWORD(v22) = __ROR__(*(uint16_t *)((char *)pal + ((v21 >> 7) & 0x1FE)), 1);
            *v23 = v22;
            ++v23;
            v24 = bswap32(*v17);
            v17 = (uint32_t *)&src[((uintptr_t)v17 + 8 - (uintptr_t)src) & 0x7FF];
            ALOWORD(v22) = __ROR__(*(uint16_t *)((char *)pal + ((v24 >> 15) & 0x1FE)), 1);
            v22 <<= 16;
            ALOWORD(v22) = __ROR__(*(uint16_t *)((char *)pal + ((v24 >> 23) & 0x1FE)), 1);
            *v23 = v22;
            ++v23;
            ALOWORD(v22) = __ROR__(*(uint16_t *)((char *)pal + (2 * (uint16_t)(v24 & 0xFFFF) & 0x1FE)), 1);
            v22 <<= 16;
            ALOWORD(v22) = __ROR__(*(uint16_t *)((char *)pal + ((v24 >> 7) & 0x1FE)), 1);
            *v23 = v22;
            v18 = v23 + 1;
            v19 = v20 - 1;
        } while (v20 != 1);
        v7 = &src[(line + (uintptr_t)v17 - (uintptr_t)src) & 0x7FF];
        v8 = (uint32_t *)((char *)v18 + ext);
        v9 = v26 - 1;
    } while (v26 != 1);
}

static inline void load8bIA8(uint8_t *src, uint8_t *dst, int wid_64, int height, int line, int ext, uint16_t *pal)
{
    uint32_t *v7;
    uint32_t *v8;
    int v9;
    int v10;
    int v11;
    uint32_t v12;
    uint32_t *v13;
    uint32_t v14;
    uint32_t *v15;
    uint32_t v16;
    uint32_t *v17;
    uint32_t *v18;
    int v19;
    int v20;
    uint32_t v21;
    uint32_t v22;
    uint32_t *v23;
    uint32_t v24;
    int v25;
    int v26;

    v7 = (uint32_t *)src;
    v8 = (uint32_t *)dst;
    v9 = height;
    do
    {
        v25 = v9;
        v10 = wid_64;
        do
        {
            v11 = v10;
            v12 = bswap32(*v7);
            v13 = v7 + 1;
            ALOWORD(v10) = __ROR__(*(uint16_t *)((char *)pal + ((v12 >> 15) & 0x1FE)), 8);
            v14 = v10 << 16;
            ALOWORD(v14) = __ROR__(*(uint16_t *)((char *)pal + ((v12 >> 23) & 0x1FE)), 8);
            *v8 = v14;
            v15 = v8 + 1;
            ALOWORD(v14) = __ROR__(*(uint16_t *)((char *)pal + (2 * (uint16_t)v12 & 0x1FE)), 8);
            v14 <<= 16;
            ALOWORD(v14) = __ROR__(*(uint16_t *)((char *)pal + ((v12 >> 7) & 0x1FE)), 8);
            *v15 = v14;
            ++v15;
            v16 = bswap32(*v13);
            v7 = v13 + 1;
            ALOWORD(v14) = __ROR__(*(uint16_t *)((char *)pal + ((v16 >> 15) & 0x1FE)), 8);
            v14 <<= 16;
            ALOWORD(v14) = __ROR__(*(uint16_t *)((char *)pal + ((v16 >> 23) & 0x1FE)), 8);
            *v15 = v14;
            ++v15;
            ALOWORD(v14) = __ROR__(*(uint16_t *)((char *)pal + (2 * (uint16_t)v16 & 0x1FE)), 8);
            v14 <<= 16;
            ALOWORD(v14) = __ROR__(*(uint16_t *)((char *)pal + ((v16 >> 7) & 0x1FE)), 8);
            *v15 = v14;
            v8 = v15 + 1;
            v10 = v11 - 1;
        } while (v11 != 1);
        if (v25 == 1)
            break;
        v26 = v25 - 1;
        v17 = (uint32_t *)((char *)v7 + line);
        v18 = (uint32_t *)((char *)v8 + ext);
        v19 = wid_64;
        do
        {
            v20 = v19;
            v21 = bswap32(v17[1]);
            ALOWORD(v19) = __ROR__(*(uint16_t *)((char *)pal + ((v21 >> 15) & 0x1FE)), 8);
            v22 = v19 << 16;
            ALOWORD(v22) = __ROR__(*(uint16_t *)((char *)pal + ((v21 >> 23) & 0x1FE)), 8);
            *v18 = v22;
            v23 = v18 + 1;
            ALOWORD(v22) = __ROR__(*(uint16_t *)((char *)pal + (2 * (uint16_t)v21 & 0x1FE)), 8);
            v22 <<= 16;
            ALOWORD(v22) = __ROR__(*(uint16_t *)((char *)pal + ((v21 >> 7) & 0x1FE)), 8);
            *v23 = v22;
            ++v23;
            v24 = bswap32(*v17);
            v17 += 2;
            ALOWORD(v22) = __ROR__(*(uint16_t *)((char *)pal + ((v24 >> 15) & 0x1FE)), 8);
            v22 <<= 16;
            ALOWORD(v22) = __ROR__(*(uint16_t *)((char *)pal + ((v24 >> 23) & 0x1FE)), 8);
            *v23 = v22;
            ++v23;
            ALOWORD(v22) = __ROR__(*(uint16_t *)((char *)pal + (2 * (uint16_t)v24 & 0x1FE)), 8);
            v22 <<= 16;
            ALOWORD(v22) = __ROR__(*(uint16_t *)((char *)pal + ((v24 >> 7) & 0x1FE)), 8);
            *v23 = v22;
            v18 = v23 + 1;
            v19 = v20 - 1;
        } while (v20 != 1);
        v7 = (uint32_t *)((char *)v17 + line);
        v8 = (uint32_t *)((char *)v18 + ext);
        v9 = v26 - 1;
    } while (v26 != 1);
}

static inline void load8bIA4(uint8_t *src, uint8_t *dst, int wid_64, int height, int line, int ext)
{
    uint32_t *v6;
    uint32_t *v7;
    int v8;
    int v9;
    uint32_t v10;
    uint32_t v11;
    uint32_t *v12;
    uint32_t *v13;
    uint32_t v14;
    uint32_t v15;
    uint32_t *v16;
    uint32_t *v17;
    int v18;
    uint32_t *v19;
    uint32_t v20;
    int v21;
    int v22;

    v6 = (uint32_t *)src;
    v7 = (uint32_t *)dst;
    v8 = height;
    do
    {
        v21 = v8;
        v9 = wid_64;
        do
        {
            v10 = *v6;
            v11 = (*v6 >> 4) & 0xF0F0F0F;
            v12 = v6 + 1;
            *v7 = (16 * v10 & 0xF0F0F0F0) | v11;
            v13 = v7 + 1;
            v14 = (*v12 >> 4) & 0xF0F0F0F;
            v15 = 16 * *v12 & 0xF0F0F0F0;
            v6 = v12 + 1;
            *v13 = v15 | v14;
            v7 = v13 + 1;
            --v9;
        } while (v9);
        if (v21 == 1)
            break;
        v22 = v21 - 1;
        v16 = (uint32_t *)((char *)v6 + line);
        v17 = (uint32_t *)((char *)v7 + ext);
        v18 = wid_64;
        do
        {
            *v17 = (16 * v16[1] & 0xF0F0F0F0) | ((v16[1] >> 4) & 0xF0F0F0F);
            v19 = v17 + 1;
            v20 = *v16;
            v16 += 2;
            *v19 = (16 * v20 & 0xF0F0F0F0) | ((v20 >> 4) & 0xF0F0F0F);
            v17 = v19 + 1;
            --v18;
        } while (v18);
        v6 = (uint32_t *)((char *)v16 + line);
        v7 = (uint32_t *)((char *)v17 + ext);
        v8 = v22 - 1;
    } while (v22 != 1);
}

static inline void load8bI(uint8_t *src, uint8_t *dst, int wid_64, int height, int line, int ext)
{
    uint32_t *v6;
    uint32_t *v7;
    int v8;
    int v9;
    uint32_t v10;
    uint32_t *v11;
    uint32_t *v12;
    uint32_t v13;
    uint32_t *v14;
    uint32_t *v15;
    int v16;
    uint32_t *v17;
    uint32_t v18;
    int v19;
    int v20;

    v6 = (uint32_t *)src;
    v7 = (uint32_t *)dst;
    v8 = height;
    do
    {
        v19 = v8;
        v9 = wid_64;
        do
        {
            v10 = *v6;
            v11 = v6 + 1;
            *v7 = v10;
            v12 = v7 + 1;
            v13 = *v11;
            v6 = v11 + 1;
            *v12 = v13;
            v7 = v12 + 1;
            --v9;
        } while (v9);
        if (v19 == 1)
            break;
        v20 = v19 - 1;
        v14 = (uint32_t *)((char *)v6 + line);
        v15 = (uint32_t *)((char *)v7 + ext);
        v16 = wid_64;
        do
        {
            *v15 = v14[1];
            v17 = v15 + 1;
            v18 = *v14;
            v14 += 2;
            *v17 = v18;
            v15 = v17 + 1;
            --v16;
        } while (v16);
        v6 = (uint32_t *)((char *)v14 + line);
        v7 = (uint32_t *)((char *)v15 + ext);
        v8 = v20 - 1;
    } while (v20 != 1);
}

//****************************************************************
// Size: 1, Format: 2
//

uint32_t Load8bCI(uintptr_t dst, uintptr_t src, int wid_64, int height, int line, int real_width, int /*tile*/)
{
    if (wid_64 < 1) wid_64 = 1;
    if (height < 1) height = 1;
    int ext = (real_width - (wid_64 << 3));
    unsigned short * pal = rdp.pal_8;

    switch (rdp.tlut_mode) {
    case 0: //palette is not used
        //in tlut DISABLE mode load CI texture as plain intensity texture instead of palette dereference.
        //Thanks to angrylion for the advice
        load8bI((uint8_t *)src, (uint8_t *)dst, wid_64, height, line, ext);
        return /*(0 << 16) | */GFX_TEXFMT_ALPHA_8;
    case 2: //color palette
        ext <<= 1;
        load8bCI((uint8_t *)src, (uint8_t *)dst, wid_64, height, line, ext, pal);
        return (1 << 16) | GFX_TEXFMT_ARGB_1555;
    default: //IA palette
        ext <<= 1;
        load8bIA8((uint8_t *)src, (uint8_t *)dst, wid_64, height, line, ext, pal);
        return (1 << 16) | GFX_TEXFMT_ALPHA_INTENSITY_88;
    }
}

//****************************************************************
// Size: 1, Format: 3
//

uint32_t Load8bIA(uintptr_t dst, uintptr_t src, int wid_64, int height, int line, int real_width, int tile)
{
    if (rdp.tlut_mode != 0)
        return Load8bCI(dst, src, wid_64, height, line, real_width, tile);

    if (wid_64 < 1) wid_64 = 1;
    if (height < 1) height = 1;
    int ext = (real_width - (wid_64 << 3));
    load8bIA4((uint8_t *)src, (uint8_t *)dst, wid_64, height, line, ext);
    return /*(0 << 16) | */GFX_TEXFMT_ALPHA_INTENSITY_44;
}

//****************************************************************
// Size: 1, Format: 4
//

uint32_t Load8bI(uintptr_t dst, uintptr_t src, int wid_64, int height, int line, int real_width, int tile)
{
    if (rdp.tlut_mode != 0)
        return Load8bCI(dst, src, wid_64, height, line, real_width, tile);

    if (wid_64 < 1) wid_64 = 1;
    if (height < 1) height = 1;
    int ext = (real_width - (wid_64 << 3));
    load8bI((uint8_t *)src, (uint8_t *)dst, wid_64, height, line, ext);
    return /*(0 << 16) | */GFX_TEXFMT_ALPHA_8;
}