project64/Source/Project64-video/TextureEnhancer/TxQuantize.cpp

/***************************************************************************
*                                                                          *
* Project64-video - A Nintendo 64 gfx plugin.                              *
* http://www.pj64-emu.com/                                                 *
* Copyright (C) 2017 Project64. All rights reserved.                       *
* Copyright (C) 2007 Hiroshi Morii                                         *
* Copyright (C) 2003 Rice1964                                              *
*                                                                          *
* License:                                                                 *
* GNU/GPLv2 http://www.gnu.org/licenses/gpl-2.0.html                       *
* version 2 of the License, or (at your option) any later version.         *
*                                                                          *
****************************************************************************/

#ifdef WIN32
#pragma warning(disable: 4786)
#endif

/* NOTE: The codes are not optimized. They can be made faster. */

#include "TxQuantize.h"

TxQuantize::TxQuantize()
{
    _txUtil = new TxUtil();

    /* get number of CPU cores. */
    _numcore = _txUtil->getNumberofProcessors();

    /* get dxtn extensions */
    _tx_compress_fxt1 = TxLoadLib::getInstance()->getfxtCompressTexFuncExt();
    _tx_compress_dxtn = TxLoadLib::getInstance()->getdxtCompressTexFuncExt();
}

TxQuantize::~TxQuantize()
{
    delete _txUtil;
}

void
TxQuantize::ARGB1555_ARGB8888(uint32* src, uint32* dest, int width, int height)
{
#if 1
    int siz = (width * height) >> 1;
    int i;
    for (i = 0; i < siz; i++) {
        *dest = (((*src & 0x00008000) ? 0xff000000 : 0x00000000) |
            ((*src & 0x00007c00) << 9) | ((*src & 0x00007000) << 4) |
            ((*src & 0x000003e0) << 6) | ((*src & 0x00000380) << 1) |
            ((*src & 0x0000001f) << 3) | ((*src & 0x0000001c) >> 2));
        dest++;
        *dest = (((*src & 0x80000000) ? 0xff000000 : 0x00000000) |
            ((*src & 0x7c000000) >> 7) | ((*src & 0x70000000) >> 12) |
            ((*src & 0x03e00000) >> 10) | ((*src & 0x03800000) >> 15) |
            ((*src & 0x001f0000) >> 13) | ((*src & 0x001c0000) >> 18));
        dest++;
        src++;
    }
#else
    int siz = (width * height) >> 1;

    __asm {
        push ebx;
        push esi;
        push edi;

        mov esi, dword ptr[src];
        mov edi, dword ptr[dest];
        mov ecx, dword ptr[siz];

    tc1_loop:
        mov eax, dword ptr[esi];
        add esi, 4;

        // arrr rrgg gggb bbbb
        // aaaaaaaa rrrrrrrr gggggggg bbbbbbbb
        mov edx, eax;         // edx = arrrrrgg gggbbbbb arrrrrgg gggbbbbb
        mov ebx, 0x00000000;
        and eax, 0x00008000;  // eax = 00000000 00000000 a0000000 00000000
        jz  transparent1;
        mov ebx, 0xff000000;  // ebx = aaaaaaaa 00000000 00000000 00000000

    transparent1:
        mov eax, edx;         // eax = arrrrrgg gggbbbbb arrrrrgg gggbbbbb
        and edx, 0x00007c00;  // edx = 00000000 00000000 0rrrrr00 00000000
        shl edx, 4;           // edx = 00000000 00000rrr rr000000 00000000
        or ebx, edx;         // ebx = aaaaaaaa 00000rrr rr000000 00000000
        shl edx, 5;           // edx = 00000000 rrrrr000 00000000 00000000
        or ebx, edx;         // ebx = aaaaaaaa rrrrrrrr rr000000 00000000
        and ebx, 0xffff0000;  // ebx = aaaaaaaa rrrrrrrr 00000000 00000000
        mov edx, eax;
        and edx, 0x000003e0;  // edx = 00000000 00000000 000000gg ggg00000
        shl edx, 1;           // edx = 00000000 00000000 00000ggg gg000000
        or ebx, edx;         // ebx = aaaaaaaa rrrrrrrr 00000ggg gg000000
        shl edx, 5;           // edx = 00000000 00000000 ggggg000 00000000
        or ebx, edx;         // ebx = aaaaaaaa rrrrrrrr gggggggg gg000000
        and ebx, 0xffffff00;  // ebx = aaaaaaaa rrrrrrrr gggggggg 00000000
        mov edx, eax;
        and edx, 0x0000001f;  // edx = 00000000 00000000 00000000 000bbbbb
        shl edx, 3;           // edx = 00000000 00000000 00000000 bbbbb000
        or ebx, edx;         // ebx = aaaaaaaa rrrrrrrr gggggggg bbbbb000
        shr edx, 5;           // edx = 00000000 00000000 00000000 00000bbb
        or ebx, edx;         // ebx = aaaaaaaa rrrrrrrr gggggggg bbbbbbbb

        mov dword ptr[edi], ebx;
        add edi, 4;

        shr eax, 16;          // eax = 00000000 00000000 arrrrrgg gggbbbbb
        mov edx, eax;         // edx = 00000000 00000000 arrrrrgg gggbbbbb
        mov ebx, 0x00000000;
        and eax, 0x00008000;  // eax = 00000000 00000000 a0000000 00000000
        jz  transparent2;
        mov ebx, 0xff000000;  // ebx = aaaaaaaa 00000000 00000000 00000000

    transparent2:
        mov eax, edx;         // eax = 00000000 00000000 arrrrrgg gggbbbbb
        and edx, 0x00007c00;  // edx = 00000000 00000000 0rrrrr00 00000000
        shl edx, 4;           // edx = 00000000 00000rrr rr000000 00000000
        or ebx, edx;         // ebx = aaaaaaaa 00000rrr rr000000 00000000
        shl edx, 5;           // edx = 00000000 rrrrr000 00000000 00000000
        or ebx, edx;         // ebx = aaaaaaaa rrrrrrrr rr000000 00000000
        and ebx, 0xffff0000;  // ebx = aaaaaaaa rrrrrrrr 00000000 00000000
        mov edx, eax;
        and edx, 0x000003e0;  // edx = 00000000 00000000 000000gg ggg00000
        shl edx, 1;           // edx = 00000000 00000000 00000ggg gg000000
        or ebx, edx;         // ebx = aaaaaaaa rrrrrrrr 00000ggg gg000000
        shl edx, 5;           // edx = 00000000 00000000 ggggg000 00000000
        or ebx, edx;         // ebx = aaaaaaaa rrrrrrrr gggggggg gg000000
        and ebx, 0xffffff00;  // ebx = aaaaaaaa rrrrrrrr gggggggg 00000000
        mov edx, eax;
        and edx, 0x0000001f;  // edx = 00000000 00000000 00000000 000bbbbb
        shl edx, 3;           // edx = 00000000 00000000 00000000 bbbbb000
        or ebx, edx;         // ebx = aaaaaaaa rrrrrrrr gggggggg bbbbb000
        shr edx, 5;           // edx = 00000000 00000000 00000000 00000bbb
        or ebx, edx;         // ebx = aaaaaaaa rrrrrrrr gggggggg bbbbbbbb

        mov dword ptr[edi], ebx;
        add edi, 4;

        dec ecx;
        jnz tc1_loop;

        pop edi;
        pop esi;
        pop ebx;
    }
#endif
}

void
TxQuantize::ARGB4444_ARGB8888(uint32* src, uint32* dest, int width, int height)
{
#if 1
    int siz = (width * height) >> 1;
    int i;
    for (i = 0; i < siz; i++) {
        *dest = ((*src & 0x0000f000) << 12) |
            ((*src & 0x00000f00) << 8) |
            ((*src & 0x000000f0) << 4) |
            (*src & 0x0000000f);
        *dest |= (*dest << 4);
        dest++;
        *dest = ((*src & 0xf0000000) |
            ((*src & 0x0f000000) >> 4) |
            ((*src & 0x00f00000) >> 8) |
            ((*src & 0x000f0000) >> 12));
        *dest |= (*dest >> 4);
        dest++;
        src++;
    }
#else
    int siz = (width * height) >> 1;

    __asm {
        push ebx;
        push esi;
        push edi;

        mov esi, dword ptr[src];
        mov edi, dword ptr[dest];
        mov ecx, dword ptr[siz];

    tc1_loop:
        mov eax, dword ptr[esi];
        add esi, 4;

        // aaaa rrrr gggg bbbb
        // aaaaaaaa rrrrrrrr gggggggg bbbbbbbb
        mov edx, eax;
        and eax, 0x0000ffff;
        mov ebx, eax;        // 00000000 00000000 aaaarrrr ggggbbbb
        and ebx, 0x0000f000; // 00000000 00000000 aaaa0000 00000000
        shl ebx, 12;         // 0000aaaa 00000000 00000000 00000000
        or eax, ebx;        // 0000aaaa 00000000 aaaarrrr ggggbbbb
        mov ebx, eax;
        and ebx, 0x00000f00; // 00000000 00000000 0000rrrr 00000000
        shl ebx, 8;          // 00000000 0000rrrr 00000000 00000000
        or eax, ebx;        // 0000aaaa 0000rrrr aaaarrrr ggggbbbb
        mov ebx, eax;
        and ebx, 0x000000f0; // 00000000 00000000 00000000 gggg0000
        shl ebx, 4;          // 00000000 00000000 0000gggg 00000000
        and eax, 0x0f0f000f; // 0000aaaa 0000rrrr 00000000 0000bbbb
        or eax, ebx;        // 0000aaaa 0000rrrr 0000gggg 0000bbbb
        mov ebx, eax;
        shl ebx, 4;          // aaaa0000 rrrr0000 gggg0000 bbbb0000
        or eax, ebx;        // aaaaaaaa rrrrrrrr gggggggg bbbbbbbb

        mov dword ptr[edi], eax;
        add edi, 4;

        shr edx, 16;
        mov ebx, edx;        // 00000000 00000000 aaaarrrr ggggbbbb
        and ebx, 0x0000f000; // 00000000 00000000 aaaa0000 00000000
        shl ebx, 12;         // 0000aaaa 00000000 00000000 00000000
        or edx, ebx;        // 0000aaaa 00000000 aaaarrrr ggggbbbb
        mov ebx, edx;
        and ebx, 0x00000f00; // 00000000 00000000 0000rrrr 00000000
        shl ebx, 8;          // 00000000 0000rrrr 00000000 00000000
        or edx, ebx;        // 0000aaaa 0000rrrr aaaarrrr ggggbbbb
        mov ebx, edx;
        and ebx, 0x000000f0; // 00000000 00000000 00000000 gggg0000
        shl ebx, 4;          // 00000000 00000000 0000gggg 00000000
        and edx, 0x0f0f000f; // 0000aaaa 0000rrrr 00000000 0000bbbb
        or edx, ebx;        // 0000aaaa 0000rrrr 0000gggg 0000bbbb
        mov ebx, edx;
        shl ebx, 4;          // aaaa0000 rrrr0000 gggg0000 bbbb0000
        or edx, ebx;        // aaaaaaaa rrrrrrrr gggggggg bbbbbbbb

        mov dword ptr[edi], edx;
        add edi, 4;

        dec ecx;
        jnz tc1_loop;

        pop edi;
        pop esi;
        pop ebx;
    }
#endif
}

void
TxQuantize::RGB565_ARGB8888(uint32* src, uint32* dest, int width, int height)
{
#if 1
    int siz = (width * height) >> 1;
    int i;
    for (i = 0; i < siz; i++) {
        *dest = (0xff000000 |
            ((*src & 0x0000f800) << 8) | ((*src & 0x0000e000) << 3) |
            ((*src & 0x000007e0) << 5) | ((*src & 0x00000600) >> 1) |
            ((*src & 0x0000001f) << 3) | ((*src & 0x0000001c) >> 2));
        dest++;
        *dest = (0xff000000 |
            ((*src & 0xf8000000) >> 8) | ((*src & 0xe0000000) >> 13) |
            ((*src & 0x07e00000) >> 11) | ((*src & 0x06000000) >> 17) |
            ((*src & 0x001f0000) >> 13) | ((*src & 0x001c0000) >> 18));
        dest++;
        src++;
    }
#else
    int siz = (width * height) >> 1;

    __asm {
        push ebx;
        push esi;
        push edi;

        mov esi, dword ptr[src];
        mov edi, dword ptr[dest];
        mov ecx, dword ptr[siz];

    tc1_loop:
        mov eax, dword ptr[esi];
        add esi, 4;

        // rrrr rggg gggb bbbb
        // 11111111 rrrrrrrr gggggggg bbbbbbbb
        mov edx, eax;
        and eax, 0x0000ffff;
        mov ebx, eax;        // 00000000 00000000 rrrrrggg gggbbbbb
        and ebx, 0x0000f800; // 00000000 00000000 rrrrr000 00000000
        shl ebx, 5;          // 00000000 000rrrrr 00000000 00000000
        or eax, ebx;        // 00000000 000rrrrr rrrrrggg gggbbbbb
        mov ebx, eax;
        and ebx, 0x000007e0; // 00000000 00000000 00000ggg ggg00000
        shl ebx, 5;          // 00000000 00000000 gggggg00 00000000
        and eax, 0x001F001F; // 00000000 000rrrrr 00000000 000bbbbb
        shl eax, 3;          // 00000000 rrrrr000 00000000 bbbbb000
        or eax, ebx;        // 00000000 rrrrr000 gggggg00 bbbbb000
        mov ebx, eax;
        shr ebx, 5;          // 00000000 00000rrr rr000ggg ggg00bbb
        and ebx, 0x00070007; // 00000000 00000rrr 00000000 00000bbb
        or eax, ebx;        // 00000000 rrrrrrrr gggggg00 bbbbbbbb
        mov ebx, eax;
        shr ebx, 6;
        and ebx, 0x00000300; // 00000000 00000000 000000gg 00000000
        or eax, ebx         // 00000000 rrrrrrrr gggggggg bbbbbbbb
            or eax, 0xff000000; // 11111111 rrrrrrrr gggggggg bbbbbbbb

        mov dword ptr[edi], eax;
        add edi, 4;

        shr edx, 16;
        mov eax, edx;        // 00000000 00000000 rrrrrggg gggbbbbb
        and eax, 0x0000ffff;
        mov ebx, eax;        // 00000000 00000000 rrrrrggg gggbbbbb
        and ebx, 0x0000f800; // 00000000 00000000 rrrrr000 00000000
        shl ebx, 5;          // 00000000 000rrrrr 00000000 00000000
        or eax, ebx;        // 00000000 000rrrrr rrrrrggg gggbbbbb
        mov ebx, eax;
        and ebx, 0x000007e0; // 00000000 00000000 00000ggg ggg00000
        shl ebx, 5;          // 00000000 00000000 gggggg00 00000000
        and eax, 0x001F001F; // 00000000 000rrrrr 00000000 000bbbbb
        shl eax, 3;          // 00000000 rrrrr000 00000000 bbbbb000
        or eax, ebx;        // 00000000 rrrrr000 gggggg00 bbbbb000
        mov ebx, eax;
        shr ebx, 5;          // 00000000 00000rrr rr000ggg ggg00bbb
        and ebx, 0x00070007; // 00000000 00000rrr 00000000 00000bbb
        or eax, ebx;        // 00000000 rrrrrrrr gggggg00 bbbbbbbb
        mov ebx, eax;
        shr ebx, 6;
        and ebx, 0x00000300; // 00000000 00000000 000000gg 00000000
        or eax, ebx         // 00000000 rrrrrrrr gggggggg bbbbbbbb
            or eax, 0xff000000; // 11111111 rrrrrrrr gggggggg bbbbbbbb

        mov dword ptr[edi], eax;
        add edi, 4;

        dec ecx;
        jnz tc1_loop;

        pop edi;
        pop esi;
        pop ebx;
    }
#endif
}

void
TxQuantize::A8_ARGB8888(uint32* src, uint32* dest, int width, int height)
{
#if 1
    int siz = (width * height) >> 2;
    int i;
    for (i = 0; i < siz; i++) {
        *dest = (*src & 0x000000ff);
        *dest |= (*dest << 8);
        *dest |= (*dest << 16);
        dest++;
        *dest = (*src & 0x0000ff00);
        *dest |= (*dest >> 8);
        *dest |= (*dest << 16);
        dest++;
        *dest = (*src & 0x00ff0000);
        *dest |= (*dest << 8);
        *dest |= (*dest >> 16);
        dest++;
        *dest = (*src & 0xff000000);
        *dest |= (*dest >> 8);
        *dest |= (*dest >> 16);
        dest++;
        src++;
    }
#else
    int siz = (width * height) >> 2;

    __asm {
        push ebx;
        push esi;
        push edi;

        mov esi, dword ptr[src];
        mov edi, dword ptr[dest];
        mov ecx, dword ptr[siz];

    tc1_loop:
        mov eax, dword ptr[esi];
        add esi, 4;

        // aaaaaaaa
        // aaaaaaaa rrrrrrrr gggggggg bbbbbbbb
        mov edx, eax;
        and eax, 0x000000ff;
        mov ebx, eax;        // 00000000 00000000 00000000 aaaaaaaa
        shl ebx, 8;          // 00000000 00000000 aaaaaaaa 00000000
        or eax, ebx;        // 00000000 00000000 aaaaaaaa aaaaaaaa
        mov ebx, eax;
        shl ebx, 16;         // aaaaaaaa aaaaaaaa 00000000 00000000
        or eax, ebx;        // aaaaaaaa rrrrrrrr gggggggg bbbbbbbb

        mov dword ptr[edi], eax;
        add edi, 4;

        mov eax, edx;
        and eax, 0x0000ff00;
        mov ebx, eax;        // 00000000 00000000 aaaaaaaa 00000000
        shr ebx, 8;          // 00000000 00000000 00000000 aaaaaaaa
        or eax, ebx;        // 00000000 00000000 aaaaaaaa aaaaaaaa
        mov ebx, eax;
        shl ebx, 16;         // aaaaaaaa aaaaaaaa 00000000 00000000
        or eax, ebx;        // aaaaaaaa rrrrrrrr gggggggg bbbbbbbb

        mov dword ptr[edi], eax;
        add edi, 4;

        mov eax, edx;
        and eax, 0x00ff0000;
        mov ebx, eax;        // 00000000 aaaaaaaa 00000000 00000000
        shl ebx, 8;          // aaaaaaaa 00000000 00000000 00000000
        or eax, ebx;        // aaaaaaaa aaaaaaaa 00000000 00000000
        mov ebx, eax;
        shr ebx, 16;         // 00000000 00000000 aaaaaaaa aaaaaaaa
        or eax, ebx;        // aaaaaaaa rrrrrrrr gggggggg bbbbbbbb

        mov dword ptr[edi], eax;
        add edi, 4;

        mov eax, edx;
        and eax, 0xff000000;
        mov ebx, eax;        // aaaaaaaa 00000000 00000000 00000000
        shr ebx, 8;          // 00000000 aaaaaaaa 00000000 00000000
        or eax, ebx;        // aaaaaaaa aaaaaaaa 00000000 00000000
        mov ebx, eax;
        shr ebx, 16;         // 00000000 00000000 aaaaaaaa aaaaaaaa
        or eax, ebx;        // aaaaaaaa rrrrrrrr gggggggg bbbbbbbb

        mov dword ptr[edi], eax;
        add edi, 4;

        dec ecx;
        jnz tc1_loop;

        pop edi;
        pop esi;
        pop ebx;
    }
#endif
}

void
TxQuantize::AI44_ARGB8888(uint32* src, uint32* dest, int width, int height)
{
#if 1
    int siz = (width * height) >> 2;
    int i;
    for (i = 0; i < siz; i++) {
        *dest = (*src & 0x0000000f);
        *dest |= ((*dest << 8) | (*dest << 16));
        *dest |= ((*src & 0x000000f0) << 20);
        *dest |= (*dest << 4);
        dest++;
        *dest = (*src & 0x00000f00);
        *dest |= ((*dest << 8) | (*dest >> 8));
        *dest |= ((*src & 0x0000f000) << 12);
        *dest |= (*dest << 4);
        dest++;
        *dest = (*src & 0x000f0000);
        *dest |= ((*dest >> 8) | (*dest >> 16));
        *dest |= ((*src & 0x00f00000) << 4);
        *dest |= (*dest << 4);
        dest++;
        *dest = ((*src & 0x0f000000) >> 4);
        *dest |= ((*dest >> 8) | (*dest >> 16));
        *dest |= (*src & 0xf0000000);
        *dest |= (*dest >> 4);
        dest++;
        src++;
    }
#else
    int siz = (width * height) >> 2;

    __asm {
        push ebx;
        push esi;
        push edi;

        mov esi, dword ptr[src];
        mov edi, dword ptr[dest];
        mov ecx, dword ptr[siz];

    tc1_loop:
        mov eax, dword ptr[esi];
        add esi, 4;

        // aaaaiiii
        // aaaaaaaa iiiiiiii iiiiiiii iiiiiiii
        mov edx, eax;
        and eax, 0x000000f0; // 00000000 00000000 00000000 aaaa0000
        mov ebx, edx;
        shl eax, 20;         // 0000aaaa 00000000 00000000 00000000
        and ebx, 0x0000000f; // 00000000 00000000 00000000 0000iiii
        or eax, ebx;        // 0000aaaa 00000000 00000000 0000iiii
        shl ebx, 8;          // 00000000 00000000 0000iiii 00000000
        or eax, ebx;        // 0000aaaa 00000000 0000iiii 0000iiii
        shl ebx, 8;          // 00000000 0000iiii 00000000 00000000
        or eax, ebx;        // 0000aaaa 0000iiii 0000iiii 0000iiii
        mov ebx, eax;
        shl ebx, 4;          // aaaa0000 iiii0000 iiii0000 iiii0000
        or eax, ebx;        // aaaaaaaa iiiiiiii iiiiiiii iiiiiiii

        mov dword ptr[edi], eax;
        add edi, 4;

        mov eax, edx;
        and eax, 0x0000f000; // 00000000 00000000 aaaa0000 00000000
        mov ebx, edx;
        shl eax, 12;         // 0000aaaa 00000000 00000000 00000000
        and ebx, 0x00000f00; // 00000000 00000000 0000iiii 00000000
        or eax, ebx;        // 0000aaaa 00000000 0000iiii 00000000
        shr ebx, 8;          // 00000000 00000000 00000000 0000iiii
        or eax, ebx;        // 0000aaaa 00000000 0000iiii 0000iiii
        shl ebx, 16;         // 00000000 0000iiii 00000000 00000000
        or eax, ebx;        // 0000aaaa 0000iiii 0000iiii 0000iiii
        mov ebx, eax;
        shl ebx, 4;          // aaaa0000 iiii0000 iiii0000 iiii0000
        or eax, ebx;        // aaaaaaaa iiiiiiii iiiiiiii iiiiiiii

        mov dword ptr[edi], eax;
        add edi, 4;

        mov eax, edx;
        and eax, 0x00f00000; // 00000000 aaaa0000 00000000 00000000
        mov ebx, edx;
        shl eax, 4;          // 0000aaaa 00000000 00000000 00000000
        and ebx, 0x000f0000; // 00000000 0000iiii 00000000 00000000
        or eax, ebx;        // 0000aaaa 0000iiii 00000000 00000000
        shr ebx, 8;          // 00000000 00000000 0000iiii 00000000
        or eax, ebx;        // 0000aaaa 0000iiii 0000iiii 00000000
        shr ebx, 8;          // 00000000 00000000 00000000 0000iiii
        or eax, ebx;        // 0000aaaa 0000iiii 0000iiii 0000iiii
        mov ebx, eax;
        shl ebx, 4;          // aaaa0000 iiii0000 iiii0000 iiii0000
        or eax, ebx;        // aaaaaaaa iiiiiiii iiiiiiii iiiiiiii

        mov dword ptr[edi], eax;
        add edi, 4;

        mov eax, edx;
        and eax, 0xf0000000; // aaaa0000 00000000 00000000 00000000
        mov ebx, edx;
        and ebx, 0x0f000000; // 0000iiii 00000000 00000000 00000000
        shr ebx, 4;          // 00000000 iiii0000 00000000 00000000
        or eax, ebx;        // aaaa0000 iiii0000 00000000 00000000
        shr ebx, 8;          // 00000000 00000000 iiii0000 00000000
        or eax, ebx;        // aaaa0000 iiii0000 iiii0000 00000000
        shr ebx, 8;          // 00000000 00000000 00000000 iiii0000
        or eax, ebx;        // aaaa0000 iiii0000 iiii0000 iiii0000
        mov ebx, eax;
        shr ebx, 4;          // 0000aaaa 0000iiii 0000iiii 0000iiii
        or eax, ebx;        // aaaaaaaa iiiiiiii iiiiiiii iiiiiiii

        mov dword ptr[edi], eax;
        add edi, 4;

        dec ecx;
        jnz tc1_loop;

        pop edi;
        pop esi;
        pop ebx;
    }
#endif
}

void
TxQuantize::AI88_ARGB8888(uint32* src, uint32* dest, int width, int height)
{
#if 1
    int siz = (width * height) >> 1;
    int i;
    for (i = 0; i < siz; i++) {
        *dest = (*src & 0x000000ff);
        *dest |= ((*dest << 8) | (*dest << 16));
        *dest |= ((*src & 0x0000ff00) << 16);
        dest++;
        *dest = (*src & 0x00ff0000);
        *dest |= ((*dest >> 8) | (*dest >> 16));
        *dest |= (*src & 0xff000000);
        dest++;
        src++;
    }
#else
    int siz = (width * height) >> 1;

    __asm {
        push ebx;
        push esi;
        push edi;

        mov esi, dword ptr[src];
        mov edi, dword ptr[dest];
        mov ecx, dword ptr[siz];

    tc1_loop:
        mov eax, dword ptr[esi];
        add esi, 4;

        // aaaaaaaa iiiiiiii
        // aaaaaaaa iiiiiiii iiiiiiii iiiiiiii
        mov edx, eax;
        and eax, 0x0000ffff; // 00000000 00000000 aaaaaaaa iiiiiiii
        mov ebx, eax;        // 00000000 00000000 aaaaaaaa iiiiiiii
        shl eax, 16;         // aaaaaaaa iiiiiiii 00000000 00000000
        and ebx, 0x000000ff; // 00000000 00000000 00000000 iiiiiiii
        or eax, ebx;        // aaaaaaaa iiiiiiii 00000000 iiiiiiii
        shl ebx, 8;          // 00000000 00000000 iiiiiiii 00000000
        or eax, ebx;        // aaaaaaaa iiiiiiii iiiiiiii iiiiiiii

        mov dword ptr[edi], eax;
        add edi, 4;

        mov eax, edx;
        and eax, 0xffff0000; // aaaaaaaa iiiiiiii 00000000 00000000
        mov ebx, eax;        // aaaaaaaa iiiiiiii 00000000 00000000
        and ebx, 0x00ff0000; // 00000000 iiiiiiii 00000000 00000000
        shr ebx, 8;          // 00000000 00000000 iiiiiiii 00000000
        or eax, ebx;        // aaaaaaaa iiiiiiii iiiiiiii 00000000
        shr ebx, 8;          // 00000000 00000000 00000000 iiiiiiii
        or eax, ebx;        // aaaaaaaa iiiiiiii iiiiiiii iiiiiiii

        mov dword ptr[edi], eax;
        add edi, 4;

        dec ecx;
        jnz tc1_loop;

        pop edi;
        pop esi;
        pop ebx;
    }
#endif
}

void
TxQuantize::ARGB8888_ARGB1555(uint32* src, uint32* dest, int width, int height)
{
#if 1
    int siz = (width * height) >> 1;
    int i;
    for (i = 0; i < siz; i++) {
        *dest = ((*src & 0xff000000) ? 0x00008000 : 0x00000000);
        *dest |= (((*src & 0x00f80000) >> 9) |
            ((*src & 0x0000f800) >> 6) |
            ((*src & 0x000000f8) >> 3));
        src++;
        *dest |= ((*src & 0xff000000) ? 0x80000000 : 0x00000000);
        *dest |= (((*src & 0x00f80000) << 7) |
            ((*src & 0x0000f800) << 10) |
            ((*src & 0x000000f8) << 13));
        src++;
        dest++;
    }
#else
    int siz = (width * height) >> 1;

    __asm {
        push ebx;
        push esi;
        push edi;

        mov esi, dword ptr[src];
        mov edi, dword ptr[dest];
        mov ecx, dword ptr[siz];

    tc1_loop:
        mov eax, dword ptr[esi];
        add esi, 4;

#if 1
        mov edx, eax;
        and eax, 0xff000000;  // aaaa0000 00000000 00000000 00000000
        jz transparent1;
        mov eax, 0x00008000;  // 00000000 00000000 a0000000 00000000

    transparent1:
        mov ebx, edx;
        and ebx, 0x00f80000;  // 00000000 rrrrr000 00000000 00000000
        shr ebx, 9;           // 00000000 00000000 0rrrrr00 00000000
        or eax, ebx;         // 00000000 00000000 arrrrr00 00000000
        mov ebx, edx;
        and ebx, 0x0000f800;  // 00000000 00000000 ggggg000 00000000
        shr ebx, 6;           // 00000000 00000000 000000gg ggg00000
        or eax, ebx;         // 00000000 00000000 arrrrrgg ggg00000
        and edx, 0x000000f8;  // 00000000 00000000 00000000 bbbbb000
        shr edx, 3;           // 00000000 00000000 00000000 000bbbbb
        or edx, eax;         // 00000000 00000000 arrrrrgg gggbbbbb

        mov eax, dword ptr[esi];
        add esi, 4;

        mov ebx, eax;
        and eax, 0xff000000;  // aaaa0000 00000000 00000000 00000000
        jz transparent2;
        or edx, 0x80000000;  // a0000000 00000000 arrrrrgg gggbbbbb

    transparent2:
        mov eax, ebx;
        and ebx, 0x00f80000;  // 00000000 rrrrr000 00000000 00000000
        shl ebx, 7;           // 0rrrrr00 00000000 00000000 00000000
        or edx, ebx;         // arrrrr00 00000000 arrrrrgg gggbbbbb
        mov ebx, eax;
        and ebx, 0x0000f800;  // 00000000 00000000 ggggg000 00000000
        shl ebx, 10;          // 000000gg ggg00000 00000000 00000000
        or edx, ebx;         // arrrrrgg ggg00000 arrrrrgg gggbbbbb
        and eax, 0x000000f8;  // 00000000 00000000 00000000 bbbbb000
        shl eax, 13;          // 00000000 000bbbbb 00000000 00000000
        or edx, eax;         // arrrrrgg gggbbbbb arrrrrgg gggbbbbb

        mov dword ptr[edi], edx;
        add edi, 4;
#else
        mov edx, eax;
        and edx, 0x01000000;  // 0000000a 00000000 00000000 00000000
        shr edx, 9;           // 00000000 00000000 a0000000 00000000
        mov ebx, eax;
        and ebx, 0x00f80000;  // 00000000 rrrrr000 00000000 00000000
        shr ebx, 9;           // 00000000 00000000 0rrrrr00 00000000
        or edx, ebx;         // 00000000 00000000 arrrrr00 00000000
        mov ebx, eax;
        and ebx, 0x0000f800;  // 00000000 00000000 ggggg000 00000000
        shr ebx, 6;           // 00000000 00000000 000000gg ggg00000
        or edx, ebx;         // 00000000 00000000 arrrrrgg ggg00000
        and eax, 0x000000f8;  // 00000000 00000000 00000000 bbbbb000
        shr eax, 3;           // 00000000 00000000 00000000 000bbbbb
        or edx, eax;         // 00000000 00000000 arrrrrgg gggbbbbb

        mov eax, dword ptr[esi];
        add esi, 4;

        mov ebx, eax;
        and ebx, 0x80000000;  // a0000000 00000000 00000000 00000000
        or edx, ebx;         // a0000000 00000000 arrrrrgg gggbbbbb
        mov ebx, eax;
        and ebx, 0x00f80000;  // 00000000 rrrrr000 00000000 00000000
        shl ebx, 7;           // 0rrrrr00 00000000 00000000 00000000
        or edx, ebx;         // arrrrr00 00000000 arrrrrgg gggbbbbb
        mov ebx, eax;
        and ebx, 0x0000f800;  // 00000000 00000000 ggggg000 00000000
        shl ebx, 10;          // 000000gg ggg00000 00000000 00000000
        or edx, ebx;         // arrrrrgg ggg00000 arrrrrgg gggbbbbb
        and eax, 0x000000f8;  // 00000000 00000000 00000000 bbbbb000
        shl eax, 13;          // 00000000 000bbbbb 00000000 00000000
        or edx, eax;         // arrrrrgg gggbbbbb arrrrrgg gggbbbbb

        mov dword ptr[edi], edx;
        add edi, 4;
#endif
        dec ecx;
        jnz tc1_loop;

        pop edi;
        pop esi;
        pop ebx;
    }
#endif
}

void
TxQuantize::ARGB8888_ARGB4444(uint32* src, uint32* dest, int width, int height)
{
#if 1
    int siz = (width * height) >> 1;
    int i;
    for (i = 0; i < siz; i++) {
        *dest = (((*src & 0xf0000000) >> 16) |
            ((*src & 0x00f00000) >> 12) |
            ((*src & 0x0000f000) >> 8) |
            ((*src & 0x000000f0) >> 4));
        src++;
        *dest |= ((*src & 0xf0000000) |
            ((*src & 0x00f00000) << 4) |
            ((*src & 0x0000f000) << 8) |
            ((*src & 0x000000f0) << 12));
        src++;
        dest++;
    }
#else
    int siz = (width * height) >> 1;

    __asm {
        push ebx;
        push esi;
        push edi;

        mov esi, dword ptr[src];
        mov edi, dword ptr[dest];
        mov ecx, dword ptr[siz];

    tc1_loop:
        mov eax, dword ptr[esi];
        add esi, 4;

        mov edx, eax;
        and edx, 0xf0000000;  // aaaa0000 00000000 00000000 00000000
        shr edx, 16;          // 00000000 00000000 aaaa0000 00000000
        mov ebx, eax;
        and ebx, 0x00f00000;  // 00000000 rrrr0000 00000000 00000000
        shr ebx, 12;          // 00000000 00000000 0000rrrr 00000000
        or edx, ebx;         // 00000000 00000000 aaaarrrr 00000000
        mov ebx, eax;
        and ebx, 0x0000f000;  // 00000000 00000000 gggg0000 00000000
        shr ebx, 8;           // 00000000 00000000 00000000 gggg0000
        or edx, ebx;         // 00000000 00000000 aaaarrrr gggg0000
        and eax, 0x000000f0;  // 00000000 00000000 00000000 bbbb0000
        shr eax, 4;           // 00000000 00000000 00000000 0000bbbb
        or edx, eax;         // 00000000 00000000 aaaarrrr ggggbbbb

        mov eax, dword ptr[esi];
        add esi, 4;

        mov ebx, eax;
        and ebx, 0xf0000000;  // aaaa0000 00000000 00000000 00000000
        or edx, ebx;         // aaaa0000 00000000 aaaarrrr ggggbbbb
        mov ebx, eax;
        and ebx, 0x00f00000;  // 00000000 rrrr0000 00000000 00000000
        shl ebx, 4;           // 0000rrrr 00000000 00000000 00000000
        or edx, ebx;         // aaaarrrr 00000000 aaaarrrr ggggbbbb
        mov ebx, eax;
        and ebx, 0x0000f000;  // 00000000 00000000 gggg0000 00000000
        shl ebx, 8;           // 00000000 gggg0000 00000000 00000000
        or edx, ebx;         // aaaarrrr gggg0000 aaaarrrr ggggbbbb
        and eax, 0x000000f0;  // 00000000 00000000 00000000 bbbb0000
        shl eax, 12;          // 00000000 0000bbbb 00000000 00000000
        or edx, eax;         // arrrrrgg ggggbbbb aaaarrrr ggggbbbb

        mov dword ptr[edi], edx;
        add edi, 4;

        dec ecx;
        jnz tc1_loop;

        pop edi;
        pop esi;
        pop ebx;
    }
#endif
}

void
TxQuantize::ARGB8888_RGB565(uint32* src, uint32* dest, int width, int height)
{
#if 1
    int siz = (width * height) >> 1;
    int i;
    for (i = 0; i < siz; i++) {
        *dest = (((*src & 0x000000f8) >> 3) |
            ((*src & 0x0000fc00) >> 5) |
            ((*src & 0x00f80000) >> 8));
        src++;
        *dest |= (((*src & 0x000000f8) << 13) |
            ((*src & 0x0000fc00) << 11) |
            ((*src & 0x00f80000) << 8));
        src++;
        dest++;
    }
#else
    int siz = (width * height) >> 1;

    __asm {
        push ebx;
        push esi;
        push edi;

        mov esi, dword ptr[src];
        mov edi, dword ptr[dest];
        mov ecx, dword ptr[siz];

    tc1_loop:
        mov eax, dword ptr[esi];
        add esi, 4;

        mov edx, eax;
        and edx, 0x000000F8;  // 00000000 00000000 00000000 bbbbb000
        shr edx, 3;           // 00000000 00000000 00000000 000bbbbb
        mov ebx, eax;
        and ebx, 0x0000FC00;  // 00000000 00000000 gggggg00 00000000
        shr ebx, 5;           // 00000000 00000000 00000ggg ggg00000
        or edx, ebx;         // 00000000 00000000 00000ggg gggbbbbb
        mov ebx, eax;
        and ebx, 0x00F80000;  // 00000000 rrrrr000 00000000 00000000
        shr ebx, 8;           // 00000000 00000000 rrrrr000 00000000
        or edx, ebx;         // 00000000 00000000 rrrrrggg gggbbbbb

        mov eax, dword ptr[esi];
        add esi, 4;

        mov ebx, eax;
        and ebx, 0x000000F8;  // 00000000 00000000 00000000 bbbbb000
        shl ebx, 13;          // 00000000 000bbbbb 00000000 00000000
        or edx, ebx;         // 00000000 000bbbbb rrrrrggg gggbbbbb
        mov ebx, eax;
        and ebx, 0x0000FC00;  // 00000000 00000000 gggggg00 00000000
        shl ebx, 11;          // 00000ggg ggg00000 00000000 00000000
        or edx, ebx;         // 00000ggg gggbbbbb rrrrrggg gggbbbbb
        mov ebx, eax;
        and ebx, 0x00F80000;  // 00000000 rrrrr000 00000000 00000000
        shl ebx, 8;           // rrrrr000 00000000 00000000 00000000
        or edx, ebx;         // rrrrrggg gggbbbbb rrrrrggg gggbbbbb

        mov dword ptr[edi], edx;
        add edi, 4;

        dec ecx;
        jnz tc1_loop;

        pop edi;
        pop esi;
        pop ebx;
    }
#endif
}

void
TxQuantize::ARGB8888_A8(uint32* src, uint32* dest, int width, int height)
{
#if 1
    int siz = (width * height) >> 2;
    int i;
    for (i = 0; i < siz; i++) {
        *dest = (*src & 0x0000ff00) >> 8;
        src++;
        *dest |= (*src & 0x0000ff00);
        src++;
        *dest |= ((*src & 0x0000ff00) << 8);
        src++;
        *dest |= ((*src & 0x0000ff00) << 16);
        src++;
        dest++;
    }
#else
    int siz = (width * height) >> 2;

    __asm {
        push ebx;
        push esi;
        push edi;

        mov esi, dword ptr[src];
        mov edi, dword ptr[dest];
        mov ecx, dword ptr[siz];

    tc1_loop:
        mov eax, dword ptr[esi];
        add esi, 4;

#if 0
        mov edx, eax;         // we'll use A comp for every pixel
        and edx, 0xFF000000;  // aaaaaaaa 00000000 00000000 00000000
        shr edx, 24;          // 00000000 00000000 00000000 aaaaaaaa

        mov eax, dword ptr[esi];
        add esi, 4;

        and eax, 0xFF000000;  // aaaaaaaa 00000000 00000000 00000000
        shr eax, 16;          // 00000000 00000000 aaaaaaaa 00000000
        or edx, eax;         // 00000000 00000000 aaaaaaaa aaaaaaaa

        mov eax, dword ptr[esi];
        add esi, 4;

        and eax, 0xFF000000;  // aaaaaaaa 00000000 00000000 00000000
        shr eax, 8;           // 00000000 aaaaaaaa 00000000 00000000
        or edx, eax;         // 00000000 aaaaaaaa aaaaaaaa aaaaaaaa

        mov eax, dword ptr[esi];
        add esi, 4;

        and eax, 0xFF000000;  // aaaaaaaa 00000000 00000000 00000000
        or edx, eax;         // aaaaaaaa aaaaaaaa aaaaaaaa aaaaaaaa
#endif

#if 1
        mov edx, eax;         // we'll use G comp for every pixel
        and edx, 0x0000FF00;  // 00000000 00000000 aaaaaaaa 00000000
        shr edx, 8;           // 00000000 00000000 00000000 aaaaaaaa

        mov eax, dword ptr[esi];
        add esi, 4;

        and eax, 0x0000FF00;  // 00000000 00000000 aaaaaaaa 00000000
        or edx, eax;         // 00000000 00000000 aaaaaaaa aaaaaaaa

        mov eax, dword ptr[esi];
        add esi, 4;

        and eax, 0x0000FF00;  // 00000000 00000000 aaaaaaaa 00000000
        shl eax, 8;           // 00000000 aaaaaaaa 00000000 00000000
        or edx, eax;         // 00000000 aaaaaaaa aaaaaaaa aaaaaaaa

        mov eax, dword ptr[esi];
        add esi, 4;

        and eax, 0x0000FF00;  // 00000000 00000000 aaaaaaaa 00000000
        shl eax, 16;          // aaaaaaaa 00000000 00000000 00000000
        or edx, eax;         // aaaaaaaa aaaaaaaa aaaaaaaa aaaaaaaa
#endif

#if 0
        mov edx, eax;
        and edx, 0x000000FF;  // 00000000 00000000 00000000 aaaaaaaa

        mov eax, dword ptr[esi];
        add esi, 4;

        and eax, 0x0000FF00;  // 00000000 00000000 aaaaaaaa 00000000
        or edx, eax;         // 00000000 00000000 aaaaaaaa aaaaaaaa

        mov eax, dword ptr[esi];
        add esi, 4;

        and eax, 0x00FF0000;  // 00000000 aaaaaaaa 00000000 00000000
        or edx, eax;         // 00000000 aaaaaaaa aaaaaaaa aaaaaaaa

        mov eax, dword ptr[esi];
        add esi, 4;

        and eax, 0xFF000000;  // aaaaaaaa 00000000 00000000 00000000
        or edx, eax;         // aaaaaaaa aaaaaaaa aaaaaaaa aaaaaaaa
#endif
        mov dword ptr[edi], edx;
        add edi, 4;

        dec ecx;
        jnz tc1_loop;

        pop edi;
        pop esi;
        pop ebx;
    }
#endif
}

void
TxQuantize::ARGB8888_AI44(uint32* src, uint32* dest, int width, int height)
{
#if 1
    int siz = (width * height) >> 2;
    int i;
    for (i = 0; i < siz; i++) {
        *dest = (((*src & 0xf0000000) >> 24) | ((*src & 0x0000f000) >> 12));
        src++;
        *dest |= (((*src & 0xf0000000) >> 16) | ((*src & 0x0000f000) >> 4));
        src++;
        *dest |= (((*src & 0xf0000000) >> 8) | ((*src & 0x0000f000) << 4));
        src++;
        *dest |= ((*src & 0xf0000000) | ((*src & 0x0000f000) << 12));
        src++;
        dest++;
    }
#else
    int siz = (width * height) >> 2;

    __asm {
        push ebx;
        push esi;
        push edi;

        mov esi, dword ptr[src];
        mov edi, dword ptr[dest];
        mov ecx, dword ptr[siz];

    tc1_loop:
        mov eax, dword ptr[esi];
        add esi, 4;

        mov edx, eax;         // use A and G comps MSB
        and edx, 0xF0000000;  // aaaa0000 00000000 00000000 00000000
        mov ebx, eax;
        shr edx, 24;          // 00000000 00000000 00000000 aaaa0000
        and ebx, 0x0000F000;  // 00000000 00000000 iiii0000 00000000
        shr ebx, 12;          // 00000000 00000000 00000000 0000iiii
        or edx, ebx;         // 00000000 00000000 00000000 aaaaiiii

        mov eax, dword ptr[esi];
        add esi, 4;

        mov ebx, eax;
        and eax, 0xF0000000;  // aaaa0000 00000000 00000000 00000000
        shr eax, 16;          // 00000000 00000000 aaaa0000 00000000
        and ebx, 0x0000F000;  // 00000000 00000000 iiii0000 00000000
        shr ebx, 4;           // 00000000 00000000 0000iiii 00000000
        or eax, ebx;         // 00000000 00000000 aaaaiiii 00000000
        or edx, eax;         // 00000000 00000000 aaaaiiii aaaaiiii

        mov eax, dword ptr[esi];
        add esi, 4;

        mov ebx, eax;
        and eax, 0xF0000000;  // aaaa0000 00000000 00000000 00000000
        shr eax, 8;           // 00000000 aaaa0000 00000000 00000000
        and ebx, 0x0000F000;  // 00000000 00000000 iiii0000 00000000
        shl ebx, 4;           // 00000000 0000iiii 00000000 00000000
        or eax, ebx;         // 00000000 aaaaiiii 00000000 00000000
        or edx, eax;         // 00000000 aaaaiiii aaaaiiii aaaaiiii

        mov eax, dword ptr[esi];
        add esi, 4;

        mov ebx, eax;
        and eax, 0xF0000000;   // aaaa0000 00000000 00000000 00000000
        and ebx, 0x0000F000;   // 00000000 00000000 iiii0000 00000000
        shl ebx, 12;           // 0000iiii 00000000 00000000 00000000
        or eax, ebx;          // aaaaiiii 00000000 00000000 00000000
        or edx, eax;          // aaaaiiii aaaaiiii aaaaiiii aaaaiiii

        mov dword ptr[edi], edx;
        add edi, 4;

        dec ecx;
        jnz tc1_loop;

        pop edi;
        pop esi;
        pop ebx;
    }
#endif
}

void
TxQuantize::ARGB8888_AI88(uint32* src, uint32* dest, int width, int height)
{
#if 1
    int siz = (width * height) >> 1;
    int i;
    for (i = 0; i < siz; i++) {
        *dest = (((*src & 0xff000000) >> 16) | ((*src & 0x0000ff00) >> 8));
        src++;
        *dest |= ((*src & 0xff000000) | ((*src & 0x0000ff00) << 8));
        src++;
        dest++;
    }
#else
    int siz = (width * height) >> 1;

    __asm {
        push ebx;
        push esi;
        push edi;

        mov esi, dword ptr[src];
        mov edi, dword ptr[dest];
        mov ecx, dword ptr[siz];

    tc1_loop:
        mov eax, dword ptr[esi];
        add esi, 4;

        mov edx, eax;
        and edx, 0xFF000000;   // aaaaaaaa 00000000 00000000 00000000
        mov ebx, eax;
        shr edx, 16;           // 00000000 00000000 aaaaaaaa 00000000
        and ebx, 0x0000FF00;   // 00000000 00000000 iiiiiiii 00000000
        shr ebx, 8;            // 00000000 00000000 00000000 iiiiiiii
        or edx, ebx;          // 00000000 00000000 aaaaaaaa iiiiiiii

        mov eax, dword ptr[esi];
        add esi, 4;

        mov ebx, eax;
        and eax, 0xFF000000;    // aaaaaaaa 00000000 00000000 00000000
        and ebx, 0x0000FF00;    // 00000000 00000000 iiiiiiii 00000000
        shl ebx, 8;             // 00000000 iiiiiiii 00000000 00000000
        or eax, ebx;           // aaaaaaaa iiiiiiii 00000000 00000000
        or edx, eax;           // aaaaaaaa iiiiiiii aaaaaaaa iiiiiiii

        mov dword ptr[edi], edx;
        add edi, 4;

        dec ecx;
        jnz tc1_loop;

        pop edi;
        pop esi;
        pop ebx;
    }
#endif
}

/* R.W. Floyd and L. Steinberg, An adaptive algorithm
 * for spatial grey scale, Proceedings of the Society
 * of Information Display 17, pp75-77, 1976
 */
void
TxQuantize::ARGB8888_RGB565_ErrD(uint32* src, uint32* dst, int width, int height)
{
    /* Floyd-Steinberg error-diffusion halftoning */

    int i, x, y;
    int qr, qg, qb; /* quantized incoming values */
    int ir, ig, ib; /* incoming values */
    int t;
    int *errR = new int[width];
    int *errG = new int[width];
    int *errB = new int[width];

    uint16 *dest = (uint16 *)dst;

    for (i = 0; i < width; i++) errR[i] = errG[i] = errB[i] = 0;

    for (y = 0; y < height; y++) {
        for (x = 0; x < width; x++) {
            /* incoming pixel values */
            ir = ((*src >> 16) & 0xFF) * 10000;
            ig = ((*src >> 8) & 0xFF) * 10000;
            ib = ((*src) & 0xFF) * 10000;

            if (x == 0) qr = qg = qb = 0;

            /* quantize pixel values.
             * qr * 0.4375 is the error from the pixel to the left,
             * errR is the error from the pixel to the top, top left, and top right */
             /* qr * 0.4375 is the error distribution to the EAST in
              * the previous loop */
            ir += errR[x] + qr * 4375 / 10000;
            ig += errG[x] + qg * 4375 / 10000;
            ib += errB[x] + qb * 4375 / 10000;

            /* error distribution to the SOUTH-EAST in the previous loop
             * can't calculate in the previous loop because it steps on
             * the above quantization */
            errR[x] = qr * 625 / 10000;
            errG[x] = qg * 625 / 10000;
            errB[x] = qb * 625 / 10000;

            qr = ir;
            qg = ig;
            qb = ib;

            /* clamp */
            if (qr < 0) qr = 0; else if (qr > 2550000) qr = 2550000;
            if (qg < 0) qg = 0; else if (qg > 2550000) qg = 2550000;
            if (qb < 0) qb = 0; else if (qb > 2550000) qb = 2550000;

            /* convert to RGB565 */
            qr = qr * 0x1F / 2550000;
            qg = qg * 0x3F / 2550000;
            qb = qb * 0x1F / 2550000;

            /* this is the dithered pixel */
            t = (qr << 11) | (qg << 5) | qb;

            /* compute the errors */
            qr = ((qr << 3) | (qr >> 2)) * 10000;
            qg = ((qg << 2) | (qg >> 4)) * 10000;
            qb = ((qb << 3) | (qb >> 2)) * 10000;
            qr = ir - qr;
            qg = ig - qg;
            qb = ib - qb;

            /* compute the error distributions */
            /* Floyd-Steinberg filter
             * 7/16 (=0.4375) to the EAST
             * 5/16 (=0.3125) to the SOUTH
             * 1/16 (=0.0625) to the SOUTH-EAST
             * 3/16 (=0.1875) to the SOUTH-WEST
             *
             *         x    7/16
             *  3/16  5/16  1/16
             */
             /* SOUTH-WEST */
            if (x > 1) {
                errR[x - 1] += qr * 1875 / 10000;
                errG[x - 1] += qg * 1875 / 10000;
                errB[x - 1] += qb * 1875 / 10000;
            }

            /* SOUTH */
            errR[x] += qr * 3125 / 10000;
            errG[x] += qg * 3125 / 10000;
            errB[x] += qb * 3125 / 10000;

            *dest = (t & 0xFFFF);

            dest++;
            src++;
        }
    }

    delete[] errR;
    delete[] errG;
    delete[] errB;
}

void
TxQuantize::ARGB8888_ARGB1555_ErrD(uint32* src, uint32* dst, int width, int height)
{
    /* Floyd-Steinberg error-diffusion halftoning */

    int i, x, y;
    int qr, qg, qb; /* quantized incoming values */
    int ir, ig, ib; /* incoming values */
    int t;
    int *errR = new int[width];
    int *errG = new int[width];
    int *errB = new int[width];

    uint16 *dest = (uint16 *)dst;

    for (i = 0; i < width; i++) errR[i] = errG[i] = errB[i] = 0;

    for (y = 0; y < height; y++) {
        for (x = 0; x < width; x++) {
            /* incoming pixel values */
            ir = ((*src >> 16) & 0xFF) * 10000;
            ig = ((*src >> 8) & 0xFF) * 10000;
            ib = ((*src) & 0xFF) * 10000;

            if (x == 0) qr = qg = qb = 0;

            /* quantize pixel values.
             * qr * 0.4375 is the error from the pixel to the left,
             * errR is the error from the pixel to the top, top left, and top right */
             /* qr * 0.4375 is the error distribution to the EAST in
              * the previous loop */
            ir += errR[x] + qr * 4375 / 10000;
            ig += errG[x] + qg * 4375 / 10000;
            ib += errB[x] + qb * 4375 / 10000;

            /* error distribution to the SOUTH-EAST of the previous loop.
             * cannot calculate in the previous loop because it steps on
             * the above quantization */
            errR[x] = qr * 625 / 10000;
            errG[x] = qg * 625 / 10000;
            errB[x] = qb * 625 / 10000;

            qr = ir;
            qg = ig;
            qb = ib;

            /* clamp */
            if (qr < 0) qr = 0; else if (qr > 2550000) qr = 2550000;
            if (qg < 0) qg = 0; else if (qg > 2550000) qg = 2550000;
            if (qb < 0) qb = 0; else if (qb > 2550000) qb = 2550000;

            /* convert to RGB555 */
            qr = qr * 0x1F / 2550000;
            qg = qg * 0x1F / 2550000;
            qb = qb * 0x1F / 2550000;

            /* this is the dithered pixel */
            t = (qr << 10) | (qg << 5) | qb;
            t |= ((*src >> 24) ? 0x8000 : 0);

            /* compute the errors */
            qr = ((qr << 3) | (qr >> 2)) * 10000;
            qg = ((qg << 3) | (qg >> 2)) * 10000;
            qb = ((qb << 3) | (qb >> 2)) * 10000;
            qr = ir - qr;
            qg = ig - qg;
            qb = ib - qb;

            /* compute the error distributions */
            /* Floyd-Steinberg filter
             * 7/16 (=0.4375) to the EAST
             * 5/16 (=0.3125) to the SOUTH
             * 1/16 (=0.0625) to the SOUTH-EAST
             * 3/16 (=0.1875) to the SOUTH-WEST
             *
             *         x    7/16
             *  3/16  5/16  1/16
             */
             /* SOUTH-WEST */
            if (x > 1) {
                errR[x - 1] += qr * 1875 / 10000;
                errG[x - 1] += qg * 1875 / 10000;
                errB[x - 1] += qb * 1875 / 10000;
            }

            /* SOUTH */
            errR[x] += qr * 3125 / 10000;
            errG[x] += qg * 3125 / 10000;
            errB[x] += qb * 3125 / 10000;

            *dest = (t & 0xFFFF);

            dest++;
            src++;
        }
    }

    delete[] errR;
    delete[] errG;
    delete[] errB;
}

void
TxQuantize::ARGB8888_ARGB4444_ErrD(uint32* src, uint32* dst, int width, int height)
{
    /* Floyd-Steinberg error-diffusion halftoning */

    /* NOTE: alpha dithering looks better for alpha gradients, but are prone
     * to producing noisy speckles for constant or step level alpha. Output
     * results should always be checked.
     */
    bool ditherAlpha = 0;

    int i, x, y;
    int qr, qg, qb, qa; /* quantized incoming values */
    int ir, ig, ib, ia; /* incoming values */
    int t;
    int *errR = new int[width];
    int *errG = new int[width];
    int *errB = new int[width];
    int *errA = new int[width];

    uint16 *dest = (uint16 *)dst;

    for (i = 0; i < width; i++) errR[i] = errG[i] = errB[i] = errA[i] = 0;

    for (y = 0; y < height; y++) {
        for (x = 0; x < width; x++) {
            /* incoming pixel values */
            ir = ((*src >> 16) & 0xFF) * 10000;
            ig = ((*src >> 8) & 0xFF) * 10000;
            ib = ((*src) & 0xFF) * 10000;
            ia = ((*src >> 24) & 0xFF) * 10000;

            if (x == 0) qr = qg = qb = qa = 0;

            /* quantize pixel values.
             * qr * 0.4375 is the error from the pixel to the left,
             * errR is the error from the pixel to the top, top left, and top right */
             /* qr * 0.4375 is the error distribution to the EAST in
              * the previous loop */
            ir += errR[x] + qr * 4375 / 10000;
            ig += errG[x] + qg * 4375 / 10000;
            ib += errB[x] + qb * 4375 / 10000;
            ia += errA[x] + qa * 4375 / 10000;

            /* error distribution to the SOUTH-EAST of the previous loop.
             * cannot calculate in the previous loop because it steps on
             * the above quantization */
            errR[x] = qr * 625 / 10000;
            errG[x] = qg * 625 / 10000;
            errB[x] = qb * 625 / 10000;
            errA[x] = qa * 625 / 10000;

            qr = ir;
            qg = ig;
            qb = ib;
            qa = ia;

            /* clamp */
            if (qr < 0) qr = 0; else if (qr > 2550000) qr = 2550000;
            if (qg < 0) qg = 0; else if (qg > 2550000) qg = 2550000;
            if (qb < 0) qb = 0; else if (qb > 2550000) qb = 2550000;
            if (qa < 0) qa = 0; else if (qa > 2550000) qa = 2550000;

            /* convert to RGB444 */
            qr = qr * 0xF / 2550000;
            qg = qg * 0xF / 2550000;
            qb = qb * 0xF / 2550000;
            qa = qa * 0xF / 2550000;

            /* this is the value to be returned */
            if (ditherAlpha) {
                t = (qa << 12) | (qr << 8) | (qg << 4) | qb;
            }
            else {
                t = (qr << 8) | (qg << 4) | qb;
                t |= (*src >> 16) & 0xF000;
            }

            /* compute the errors */
            qr = ((qr << 4) | qr) * 10000;
            qg = ((qg << 4) | qg) * 10000;
            qb = ((qb << 4) | qb) * 10000;
            qa = ((qa << 4) | qa) * 10000;
            qr = ir - qr;
            qg = ig - qg;
            qb = ib - qb;
            qa = ia - qa;

            /* compute the error distributions */
            /* Floyd-Steinberg filter
             * 7/16 (=0.4375) to the EAST
             * 5/16 (=0.3125) to the SOUTH
             * 1/16 (=0.0625) to the SOUTH-EAST
             * 3/16 (=0.1875) to the SOUTH-WEST
             *
             *         x    7/16
             *  3/16  5/16  1/16
             */
             /* SOUTH-WEST */
            if (x > 1) {
                errR[x - 1] += qr * 1875 / 10000;
                errG[x - 1] += qg * 1875 / 10000;
                errB[x - 1] += qb * 1875 / 10000;
                errA[x - 1] += qa * 1875 / 10000;
            }

            /* SOUTH */
            errR[x] += qr * 3125 / 10000;
            errG[x] += qg * 3125 / 10000;
            errB[x] += qb * 3125 / 10000;
            errA[x] += qa * 3125 / 10000;

            *dest = (t & 0xFFFF);

            dest++;
            src++;
        }
    }

    delete[] errR;
    delete[] errG;
    delete[] errB;
    delete[] errA;
}

void
TxQuantize::ARGB8888_AI44_ErrD(uint32* src, uint32* dst, int width, int height)
{
    /* Floyd-Steinberg error-diffusion halftoning */

    /* NOTE: alpha dithering looks better for alpha gradients, but are prone
     * to producing noisy speckles for constant or step level alpha. Output
     * results should always be checked.
     */
    bool ditherAlpha = 0;

    int i, x, y;
    int qi, qa; /* quantized incoming values */
    int ii, ia; /* incoming values */
    int t;
    int *errI = new int[width];
    int *errA = new int[width];

    uint8 *dest = (uint8 *)dst;

    for (i = 0; i < width; i++) errI[i] = errA[i] = 0;

    for (y = 0; y < height; y++) {
        for (x = 0; x < width; x++) {
            /* 3dfx style Intensity = R * 0.299 + G * 0.587 + B * 0.114 */
            ii = ((*src >> 16) & 0xFF) * 2990 +
                ((*src >> 8) & 0xFF) * 5870 +
                ((*src) & 0xFF) * 1140;
            ia = ((*src >> 24) & 0xFF) * 10000;

            if (x == 0) qi = qa = 0;

            /* quantize pixel values.
             * qi * 0.4375 is the error from the pixel to the left,
             * errI is the error from the pixel to the top, top left, and top right */
             /* qi * 0.4375 is the error distrtibution to the EAST in
              * the previous loop */
            ii += errI[x] + qi * 4375 / 10000;
            ia += errA[x] + qa * 4375 / 10000;

            /* error distribution to the SOUTH-EAST in the previous loop.
             * cannot calculate in the previous loop because it steps on
             * the above quantization */
            errI[x] = qi * 625 / 10000;
            errA[x] = qa * 625 / 10000;

            qi = ii;
            qa = ia;

            /* clamp */
            if (qi < 0) qi = 0; else if (qi > 2550000) qi = 2550000;
            if (qa < 0) qa = 0; else if (qa > 2550000) qa = 2550000;

            /* convert to I4 */
            qi = qi * 0xF / 2550000;
            qa = qa * 0xF / 2550000;

            /* this is the value to be returned */
            if (ditherAlpha) {
                t = (qa << 4) | qi;
            }
            else {
                t = qi;
                t |= ((*src >> 24) & 0xF0);
            }

            /* compute the errors */
            qi = ((qi << 4) | qi) * 10000;
            qa = ((qa << 4) | qa) * 10000;
            qi = ii - qi;
            qa = ia - qa;

            /* compute the error distributions */
            /* Floyd-Steinberg filter
             * 7/16 (=0.4375) to the EAST
             * 5/16 (=0.3125) to the SOUTH
             * 1/16 (=0.0625) to the SOUTH-EAST
             * 3/16 (=0.1875) to the SOUTH-WEST
             *
             *         x    7/16
             *  3/16  5/16  1/16
             */
             /* SOUTH-WEST */
            if (x > 1) {
                errI[x - 1] += qi * 1875 / 10000;
                errA[x - 1] += qa * 1875 / 10000;
            }

            /* SOUTH */
            errI[x] += qi * 3125 / 10000;
            errA[x] += qa * 3125 / 10000;

            *dest = t & 0xFF;

            dest++;
            src++;
        }
    }

    delete[] errI;
    delete[] errA;
}

void
TxQuantize::ARGB8888_AI88_Slow(uint32* src, uint32* dst, int width, int height)
{
    int x, y;
    uint16 *dest = (uint16 *)dst;
    for (y = 0; y < height; y++) {
        for (x = 0; x < width; x++) {
#if 1
            /* libpng style grayscale conversion.
             * Reduce RGB files to grayscale with or without alpha
             * using the equation given in Poynton's ColorFAQ at
             * <http://www.inforamp.net/~poynton/>
             * Copyright (c) 1998-01-04 Charles Poynton poynton at inforamp.net
             *
             *     Y = 0.212671 * R + 0.715160 * G + 0.072169 * B
             *
             *  We approximate this with
             *
             *     Y = 0.21268 * R    + 0.7151 * G    + 0.07217 * B
             *
             *  which can be expressed with integers as
             *
             *     Y = (6969 * R + 23434 * G + 2365 * B)/32768
             *
             *  The calculation is to be done in a linear colorspace.
             */
            *dest = (((int)((((*src >> 16) & 0xFF) * 6969 +
                ((*src >> 8) & 0xFF) * 23434 +
                ((*src) & 0xFF) * 2365) / 32768) & 0xFF) |
                (uint16)((*src >> 16) & 0xFF00));
#else
            /* 3dfx style Intensity = R * 0.299 + G * 0.587 + B * 0.114
             * this is same as the standard NTSC gray scale conversion. */
            *dest = (((int)((((*src >> 16) & 0xFF) * 299 +
                ((*src >> 8) & 0xFF) * 587 +
                ((*src) & 0xFF) * 114) / 1000) & 0xFF) |
                (uint16)((*src >> 16) & 0xFF00));
#endif
            dest++;
            src++;
        }
    }
}

void
TxQuantize::ARGB8888_I8_Slow(uint32* src, uint32* dst, int width, int height)
{
    int x, y;
    uint8 *dest = (uint8 *)dst;
    for (y = 0; y < height; y++) {
        for (x = 0; x < width; x++) {
#if 1
            /* libpng style Intensity = (6969 * R + 23434 * G + 2365 * B)/32768 */
            * dest = (int)((((*src >> 16) & 0xFF) * 6969 +
                ((*src >> 8) & 0xFF) * 23434 +
                ((*src) & 0xFF) * 2365) / 32768) & 0xFF;
#else
            /* 3dfx style Intensity = R * 0.299 + G * 0.587 + B * 0.114
             * this is same as the standard NTSC gray scale conversion. */
            *dest = (int)((((*src >> 16) & 0xFF) * 299 +
                ((*src >> 8) & 0xFF) * 587 +
                ((*src) & 0xFF) * 114) / 1000) & 0xFF;
#endif
            dest++;
            src++;
        }
    }
}

void
TxQuantize::P8_16BPP(uint32* src, uint32* dest, int width, int height, uint32* palette)
{
    /* passed in palette is RGBA5551 format */
#if 1
    int i;
    int size = width * height;
    for (i = 0; i < size; i++) {
        ((uint16*)dest)[i] = ((uint16*)palette)[(int)(((uint8*)src)[i])];
        ((uint16*)dest)[i] = ((((uint16*)dest)[i] << 15) | (((uint16*)dest)[i] >> 1));
    }
#else

  /* not finished yet... */

    int siz = (width * height) >> 2;

    __asm {
        push ebx;
        push esi;
        push edi;

        mov esi, dword ptr[src];
        mov edi, dword ptr[dest];
        mov ecx, dword ptr[siz];
        mov edx, dword ptr[palette];

    tc1_loop:
        mov eax, dword ptr[esi];
        add esi, 4;

        dec ecx;
        jnz tc1_loop;

        pop edi;
        pop esi;
        pop ebx;
    }
#endif
}

bool
TxQuantize::quantize(uint8* src, uint8* dest, int width, int height, uint16 srcformat, uint16 destformat, bool fastQuantizer)
{
    typedef void (TxQuantize::*quantizerFunc)(uint32* src, uint32* dest, int width, int height);
    quantizerFunc quantizer;
    int bpp_shift = 0;

    if (destformat == GR_TEXFMT_ARGB_8888) {
        switch (srcformat) {
        case GR_TEXFMT_ARGB_1555:
            quantizer = &TxQuantize::ARGB1555_ARGB8888;
            bpp_shift = 1;
            break;
        case GR_TEXFMT_ARGB_4444:
            quantizer = &TxQuantize::ARGB4444_ARGB8888;
            bpp_shift = 1;
            break;
        case GR_TEXFMT_RGB_565:
            quantizer = &TxQuantize::RGB565_ARGB8888;
            bpp_shift = 1;
            break;
        case GR_TEXFMT_ALPHA_8:
            quantizer = &TxQuantize::A8_ARGB8888;
            bpp_shift = 2;
            break;
        case GR_TEXFMT_ALPHA_INTENSITY_44:
            quantizer = &TxQuantize::AI44_ARGB8888;
            bpp_shift = 2;
            break;
        case GR_TEXFMT_ALPHA_INTENSITY_88:
            quantizer = &TxQuantize::AI88_ARGB8888;
            bpp_shift = 1;
            break;
        default:
            return 0;
        }

        unsigned int numcore = _numcore;
        unsigned int blkrow = 0;
        while (numcore > 1 && blkrow == 0) {
            blkrow = (height >> 2) / numcore;
            numcore--;
        }
        (*this.*quantizer)((uint32*)src, (uint32*)dest, width, height);
    }
    else if (srcformat == GR_TEXFMT_ARGB_8888) {
        switch (destformat) {
        case GR_TEXFMT_ARGB_1555:
            quantizer = fastQuantizer ? &TxQuantize::ARGB8888_ARGB1555 : &TxQuantize::ARGB8888_ARGB1555_ErrD;
            bpp_shift = 1;
            break;
        case GR_TEXFMT_ARGB_4444:
            quantizer = fastQuantizer ? &TxQuantize::ARGB8888_ARGB4444 : &TxQuantize::ARGB8888_ARGB4444_ErrD;
            bpp_shift = 1;
            break;
        case GR_TEXFMT_RGB_565:
            quantizer = fastQuantizer ? &TxQuantize::ARGB8888_RGB565 : &TxQuantize::ARGB8888_RGB565_ErrD;
            bpp_shift = 1;
            break;
        case GR_TEXFMT_ALPHA_8:
        case GR_TEXFMT_INTENSITY_8:
            quantizer = fastQuantizer ? &TxQuantize::ARGB8888_A8 : &TxQuantize::ARGB8888_I8_Slow;
            bpp_shift = 2;
            break;
        case GR_TEXFMT_ALPHA_INTENSITY_44:
            quantizer = fastQuantizer ? &TxQuantize::ARGB8888_AI44 : &TxQuantize::ARGB8888_AI44_ErrD;
            bpp_shift = 2;
            break;
        case GR_TEXFMT_ALPHA_INTENSITY_88:
            quantizer = fastQuantizer ? &TxQuantize::ARGB8888_AI88 : &TxQuantize::ARGB8888_AI88_Slow;
            bpp_shift = 1;
            break;
        default:
            return 0;
        }
        (*this.*quantizer)((uint32*)src, (uint32*)dest, width, height);
    }
    else {
        return 0;
    }

    return 1;
}

bool
TxQuantize::FXT1(uint8 *src, uint8 *dest,
    int srcwidth, int srcheight, uint16 srcformat,
    int *destwidth, int *destheight, uint16 *destformat)
{
    /*
     * NOTE: src must be in ARGB8888 format, srcformat describes
     * the closest 16bbp representation of src.
     *
     * NOTE: I have modified the dxtn library to use ARGB format
     * which originaly was ABGR format.
     */

    bool bRet = 0;

    if (_tx_compress_fxt1 &&
        srcwidth >= 8 && srcheight >= 4) {
        /* compress to fxt1
         * width and height must be larger than 8 and 4 respectively
         */
        int dstRowStride = ((srcwidth + 7) & ~7) << 1;
        int srcRowStride = (srcwidth << 2);

        unsigned int numcore = _numcore;
        unsigned int blkrow = 0;
        while (numcore > 1 && blkrow == 0) {
            blkrow = (srcheight >> 2) / numcore;
            numcore--;
        }
        (*_tx_compress_fxt1)(srcwidth,      /* width */
            srcheight,     /* height */
            4,             /* comps: ARGB8888=4, RGB888=3 */
            src,           /* source */
            srcRowStride,  /* width*comps */
            dest,          /* destination */
            dstRowStride); /* 16 bytes per 8x4 texel */

/* dxtn adjusts width and height to M8 and M4 respectively by replication */
        *destwidth = (srcwidth + 7) & ~7;
        *destheight = (srcheight + 3) & ~3;
        *destformat = GR_TEXFMT_ARGB_CMP_FXT1;

        bRet = 1;
    }

    return bRet;
}

bool
TxQuantize::DXTn(uint8 *src, uint8 *dest,
    int srcwidth, int srcheight, uint16 srcformat,
    int *destwidth, int *destheight, uint16 *destformat)
{
    /*
     * NOTE: src must be in ARGB8888 format, srcformat describes
     * the closest 16bbp representation of src.
     *
     * NOTE: I have modified the dxtn library to use ARGB format
     * which originaly was ABGR format.
     */

    bool bRet = 0;

    if (_tx_compress_dxtn &&
        srcwidth >= 4 && srcheight >= 4) {
        /* compress to dxtn
         * width and height must be larger than 4
         */

         /* skip formats that DXTn won't help in size. */
        if (srcformat == GR_TEXFMT_ALPHA_8 ||
            srcformat == GR_TEXFMT_ALPHA_INTENSITY_44) {
            ; /* shutup compiler */
        }
        else {
            int dstRowStride = ((srcwidth + 3) & ~3) << 2;
            int compression = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT;

            *destformat = GR_TEXFMT_ARGB_CMP_DXT5;

#if !GLIDE64_DXTN
            /* okay... we are going to disable DXT1 with 1bit alpha
             * for Glide64. some textures have all 0 alpha values.
             * see "N64 Kobe Bryant in NBA Courtside"
             */
            if (srcformat == GR_TEXFMT_ARGB_1555) {
                dstRowStride >>= 1;
                compression = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
                *destformat = GR_TEXFMT_ARGB_CMP_DXT1;
            }
            else
#endif
                if (srcformat == GR_TEXFMT_RGB_565 ||
                    srcformat == GR_TEXFMT_INTENSITY_8) {
                    dstRowStride >>= 1;
                    compression = GL_COMPRESSED_RGB_S3TC_DXT1_EXT;
                    *destformat = GR_TEXFMT_ARGB_CMP_DXT1;
                }

            unsigned int numcore = _numcore;
            unsigned int blkrow = 0;
            while (numcore > 1 && blkrow == 0) {
                blkrow = (srcheight >> 2) / numcore;
                numcore--;
            }
            (*_tx_compress_dxtn)(4,             /* comps: ARGB8888=4, RGB888=3 */
                srcwidth,      /* width */
                srcheight,     /* height */
                src,           /* source */
                compression,   /* format */
                dest,          /* destination */
                dstRowStride); /* DXT1 = 8 bytes per 4x4 texel
                                * others = 16 bytes per 4x4 texel */

                                /* dxtn adjusts width and height to M4 by replication */
            *destwidth = (srcwidth + 3) & ~3;
            *destheight = (srcheight + 3) & ~3;

            bRet = 1;
        }
    }

    return bRet;
}

bool
TxQuantize::compress(uint8 *src, uint8 *dest,
    int srcwidth, int srcheight, uint16 srcformat,
    int *destwidth, int *destheight, uint16 *destformat,
    int compressionType)
{
    bool bRet = 0;

    switch (compressionType) {
    case FXT1_COMPRESSION:
        bRet = FXT1(src, dest,
            srcwidth, srcheight, srcformat,
            destwidth, destheight, destformat);
        break;
    case S3TC_COMPRESSION:
        bRet = DXTn(src, dest,
            srcwidth, srcheight, srcformat,
            destwidth, destheight, destformat);
        break;
    case NCC_COMPRESSION:
        /* TODO: narrow channel compression */
        ;
    }

    return bRet;
}

#if 0 /* unused */
void
TxQuantize::I8_ARGB8888(uint32* src, uint32* dest, int width, int height)
{
    int siz = (width * height) >> 2;

    __asm {
        push ebx;
        push esi;
        push edi;

        mov esi, dword ptr[src];
        mov edi, dword ptr[dest];
        mov ecx, dword ptr[siz];

    tc1_loop:
        mov eax, dword ptr[esi];
        add esi, 4;

        // aaaaaaaa
        // 11111111 aaaaaaaa aaaaaaaa aaaaaaaa
        mov edx, eax;
        and eax, 0x000000ff;
        mov ebx, eax;        // 00000000 00000000 00000000 aaaaaaaa
        shl ebx, 8;          // 00000000 00000000 aaaaaaaa 00000000
        or eax, ebx;        // 00000000 00000000 aaaaaaaa aaaaaaaa
        shl ebx, 8;         // 00000000 aaaaaaaa 00000000 00000000
        or eax, ebx;        // 00000000 aaaaaaaa aaaaaaaa aaaaaaaa
        or eax, 0xff000000; // 11111111 aaaaaaaa aaaaaaaa aaaaaaaa

        mov dword ptr[edi], eax;
        add edi, 4;

        mov eax, edx;
        and eax, 0x0000ff00;
        mov ebx, eax;        // 00000000 00000000 aaaaaaaa 00000000
        shr ebx, 8;          // 00000000 00000000 00000000 aaaaaaaa
        or eax, ebx;        // 00000000 00000000 aaaaaaaa aaaaaaaa
        shl ebx, 16;         // 00000000 aaaaaaaa 00000000 00000000
        or eax, ebx;        // 00000000 aaaaaaaa aaaaaaaa aaaaaaaa
        or eax, 0xff000000; // 11111111 aaaaaaaa aaaaaaaa aaaaaaaa

        mov dword ptr[edi], eax;
        add edi, 4;

        mov eax, edx;
        and eax, 0x00ff0000;
        mov ebx, eax;        // 00000000 aaaaaaaa 00000000 00000000
        shr ebx, 8;          // 00000000 00000000 aaaaaaaa 00000000
        or eax, ebx;        // 00000000 aaaaaaaa aaaaaaaa 00000000
        shr ebx, 8;         // 00000000 00000000 00000000 aaaaaaaa
        or eax, ebx;        // 00000000 aaaaaaaa aaaaaaaa aaaaaaaa
        or eax, 0xff000000; // 11111111 aaaaaaaa aaaaaaaa aaaaaaaa

        mov dword ptr[edi], eax;
        add edi, 4;

        mov eax, edx;
        and eax, 0xff000000;
        mov ebx, eax;        // aaaaaaaa 00000000 00000000 00000000
        shr ebx, 8;          // 00000000 aaaaaaaa 00000000 00000000
        or eax, ebx;        // aaaaaaaa aaaaaaaa 00000000 00000000
        shr ebx, 8;         // 00000000 00000000 aaaaaaaa 00000000
        or eax, ebx;        // aaaaaaaa aaaaaaaa aaaaaaaa 00000000
        shr eax, 8;         // 00000000 aaaaaaaa aaaaaaaa aaaaaaaa
        or eax, 0xff000000; // 11111111 aaaaaaaa aaaaaaaa aaaaaaaa

        mov dword ptr[edi], eax;
        add edi, 4;

        dec ecx;
        jnz tc1_loop;

        pop edi;
        pop esi;
        pop ebx;
    }
}

void
TxQuantize::ARGB8888_I8(uint32* src, uint32* dest, int width, int height)
{
    ARGB8888_A8(src, dest, width, height);
}

void
TxQuantize::ARGB1555_ABGR8888(uint32* src, uint32* dest, int width, int height)
{
    int siz = (width * height) >> 1;

    __asm {
        push ebx;
        push esi;
        push edi;

        mov esi, dword ptr[src];
        mov edi, dword ptr[dest];
        mov ecx, dword ptr[siz];

    tc1_loop:
        mov eax, dword ptr[esi];
        add esi, 4;

        // arrr rrgg gggb bbbb
        // aaaaaaaa bbbbbbbb gggggggg rrrrrrrr
        mov edx, eax;         // edx = arrrrrgg gggbbbbb arrrrrgg gggbbbbb
        and ebx, 0x00000000;
        and eax, 0x00008000;  // eax = 00000000 00000000 a0000000 00000000
        jz  transparent1;
        or ebx, 0xff000000;  // ebx = aaaaaaaa 00000000 00000000 00000000

    transparent1:
        mov eax, edx;         // eax = arrrrrgg gggbbbbb arrrrrgg gggbbbbb
        and edx, 0x0000001f;  // edx = 00000000 00000000 00000000 000bbbbb
        shl edx, 14;          // edx = 00000000 00000bbb bb000000 00000000
        or ebx, edx;         // ebx = aaaaaaaa 00000bbb bb000000 00000000
        shl edx, 5;           // edx = 00000000 bbbbb000 00000000 00000000
        or ebx, edx;         // ebx = aaaaaaaa bbbbbbbb bb000000 00000000
        and ebx, 0xffff0000;  // ebx = aaaaaaaa bbbbbbbb 00000000 00000000
        mov edx, eax;
        and edx, 0x000003e0;  // edx = 00000000 00000000 000000gg ggg00000
        shl edx, 1;           // edx = 00000000 00000000 00000ggg gg000000
        or ebx, edx;         // ebx = aaaaaaaa bbbbbbbb 00000ggg gg000000
        shl edx, 5;           // edx = 00000000 00000000 ggggg000 00000000
        or ebx, edx;         // ebx = aaaaaaaa bbbbbbbb gggggggg gg000000
        and ebx, 0xffffff00;  // ebx = aaaaaaaa bbbbbbbb gggggggg 00000000
        mov edx, eax;
        and edx, 0x00007c00;  // edx = 00000000 00000000 0rrrrr00 00000000
        shr edx, 7;           // edx = 00000000 00000000 00000000 rrrrr000
        or ebx, edx;         // ebx = aaaaaaaa bbbbbbbb gggggggg rrrrr000
        shr edx, 5;           // edx = 00000000 00000000 00000000 00000rrr
        or ebx, edx;         // ebx = aaaaaaaa bbbbbbbb gggggggg rrrrrrrr

        mov dword ptr[edi], ebx;
        add edi, 4;

        shr eax, 16;          // eax = 00000000 00000000 arrrrrgg gggbbbbb
        mov edx, eax;         // edx = 00000000 00000000 arrrrrgg gggbbbbb
        and ebx, 0x00000000;
        and eax, 0x00008000;  // eax = 00000000 00000000 a0000000 00000000
        jz  transparent2;
        or ebx, 0xff000000;  // ebx = aaaaaaaa 00000000 00000000 00000000

    transparent2:
        mov eax, edx;         // eax = arrrrrgg gggbbbbb arrrrrgg gggbbbbb
        and edx, 0x0000001f;  // edx = 00000000 00000000 00000000 000bbbbb
        shl edx, 14;          // edx = 00000000 00000bbb bb000000 00000000
        or ebx, edx;         // ebx = aaaaaaaa 00000bbb bb000000 00000000
        shl edx, 5;           // edx = 00000000 bbbbb000 00000000 00000000
        or ebx, edx;         // ebx = aaaaaaaa bbbbbbbb bb000000 00000000
        and ebx, 0xffff0000;  // ebx = aaaaaaaa bbbbbbbb 00000000 00000000
        mov edx, eax;
        and edx, 0x000003e0;  // edx = 00000000 00000000 000000gg ggg00000
        shl edx, 1;           // edx = 00000000 00000000 00000ggg gg000000
        or ebx, edx;         // ebx = aaaaaaaa bbbbbbbb 00000ggg gg000000
        shl edx, 5;           // edx = 00000000 00000000 ggggg000 00000000
        or ebx, edx;         // ebx = aaaaaaaa bbbbbbbb gggggggg gg000000
        and ebx, 0xffffff00;  // ebx = aaaaaaaa bbbbbbbb gggggggg 00000000
        mov edx, eax;
        and edx, 0x00007c00;  // edx = 00000000 00000000 0rrrrr00 00000000
        shr edx, 7;           // edx = 00000000 00000000 00000000 rrrrr000
        or ebx, edx;         // ebx = aaaaaaaa bbbbbbbb gggggggg rrrrr000
        shr edx, 5;           // edx = 00000000 00000000 00000000 00000rrr
        or ebx, edx;         // ebx = aaaaaaaa bbbbbbbb gggggggg rrrrrrrr

        mov dword ptr[edi], ebx;
        add edi, 4;

        dec ecx;
        jnz tc1_loop;

        pop edi;
        pop esi;
        pop ebx;
    }
}

void
TxQuantize::ARGB4444_ABGR8888(uint32* src, uint32* dest, int width, int height)
{
    int siz = (width * height) >> 1;

    __asm {
        push ebx;
        push esi;
        push edi;

        mov esi, dword ptr[src];
        mov edi, dword ptr[dest];
        mov ecx, dword ptr[siz];

    tc1_loop:
        mov eax, dword ptr[esi];
        add esi, 4;

        // aaaa rrrr gggg bbbb
        // aaaaaaaa bbbbbbbb gggggggg rrrrrrrr
        mov edx, eax;
        and eax, 0x0000ffff;
        mov ebx, eax;        // 00000000 00000000 aaaarrrr ggggbbbb
        and ebx, 0x0000f000; // 00000000 00000000 aaaa0000 00000000
        shl ebx, 12;         // 0000aaaa 00000000 00000000 00000000
        or eax, ebx;        // 0000aaaa 00000000 aaaarrrr ggggbbbb
        mov ebx, eax;
        and ebx, 0x0000000f; // 00000000 00000000 00000000 0000bbbb
        shl ebx, 16;         // 00000000 0000bbbb 00000000 00000000
        or eax, ebx;        // 0000aaaa 0000bbbb aaaarrrr ggggbbbb
        mov ebx, eax;
        and ebx, 0x00000f00; // 00000000 00000000 0000rrrr 00000000
        shr ebx, 8;          // 00000000 00000000 00000000 0000rrrr
        and eax, 0xfffffff0;
        or eax, ebx;        // 0000aaaa 0000bbbb aaaarrrr ggggrrrr
        mov ebx, eax;
        and ebx, 0x000000f0; // 00000000 00000000 00000000 gggg0000
        shl ebx, 4;          // 00000000 00000000 0000gggg 00000000
        and eax, 0x0f0f000f; // 0000aaaa 0000bbbb 00000000 0000rrrr
        or eax, ebx;        // 0000aaaa 0000bbbb 0000gggg 0000rrrr
        mov ebx, eax;
        shl ebx, 4;          // aaaa0000 bbbb0000 gggg0000 rrrr0000
        or eax, ebx;        // aaaaaaaa bbbbbbbb gggggggg rrrrrrrr

        mov dword ptr[edi], eax;

        add edi, 4;

        shr edx, 16;
        mov ebx, edx;        // 00000000 00000000 aaaarrrr ggggbbbb
        and ebx, 0x0000f000; // 00000000 00000000 aaaa0000 00000000
        shl ebx, 12;         // 0000aaaa 00000000 00000000 00000000
        or edx, ebx;        // 0000aaaa 00000000 aaaarrrr ggggbbbb
        mov ebx, edx;
        and ebx, 0x0000000f; // 00000000 00000000 00000000 0000bbbb
        shl ebx, 16;         // 00000000 0000bbbb 00000000 00000000
        or edx, ebx;        // 0000aaaa 0000bbbb aaaarrrr ggggbbbb
        mov ebx, edx;
        and ebx, 0x00000f00; // 00000000 00000000 0000rrrr 00000000
        shr ebx, 8;          // 00000000 00000000 00000000 0000rrrr
        and edx, 0xfffffff0;
        or edx, ebx;        // 0000aaaa 0000bbbb aaaarrrr ggggrrrr
        mov ebx, edx;
        and ebx, 0x000000f0; // 00000000 00000000 00000000 gggg0000
        shl ebx, 4;          // 00000000 00000000 0000gggg 00000000
        and edx, 0x0f0f000f; // 0000aaaa 0000bbbb 00000000 0000rrrr
        or edx, ebx;        // 0000aaaa 0000bbbb 0000gggg 0000rrrr
        mov ebx, edx;
        shl ebx, 4;          // aaaa0000 bbbb0000 gggg0000 rrrr0000
        or edx, ebx;        // aaaaaaaa bbbbbbbb gggggggg rrrrrrrr

        mov dword ptr[edi], edx;
        add edi, 4;

        dec ecx;
        jnz tc1_loop;

        pop edi;
        pop esi;
        pop ebx;
    }
}

void
TxQuantize::ARGB8888_ABGR8888(uint32* src, uint32* dest, int width, int height)
{
    int siz = width * height;

    __asm {
        push ebx;
        push esi;
        push edi;

        mov esi, dword ptr[src];
        mov edi, dword ptr[dest];
        mov ecx, dword ptr[siz];

    tc1_loop:
        mov eax, dword ptr[esi];
        add esi, 4;

        // aaaaaaaa bbbbbbbb gggggggg rrrrrrrr
        mov edx, eax;
        bswap edx;
        shr edx, 8;
        and eax, 0xff000000;

        or eax, edx;

        mov dword ptr[edi], eax;
        add edi, 4;

        dec ecx;
        jnz tc1_loop;

        pop edi;
        pop esi;
        pop ebx;
    }
}
#endif