/*
 * Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
 *
 * (c) Copyright 1996 - 2001 Gary Henderson (gary.henderson@ntlworld.com) and
 *                           Jerremy Koot (jkoot@snes9x.com)
 *
 * Super FX C emulator code 
 * (c) Copyright 1997 - 1999 Ivar (ivar@snes9x.com) and
 *                           Gary Henderson.
 * Super FX assembler emulator code (c) Copyright 1998 zsKnight and _Demo_.
 *
 * DSP1 emulator code (c) Copyright 1998 Ivar, _Demo_ and Gary Henderson.
 * C4 asm and some C emulation code (c) Copyright 2000 zsKnight and _Demo_.
 * C4 C code (c) Copyright 2001 Gary Henderson (gary.henderson@ntlworld.com).
 *
 * DOS port code contains the works of other authors. See headers in
 * individual files.
 *
 * Snes9x homepage: http://www.snes9x.com
 *
 * Permission to use, copy, modify and distribute Snes9x in both binary and
 * source form, for non-commercial purposes, is hereby granted without fee,
 * providing that this license information and copyright notice appear with
 * all copies and any derived work.
 *
 * This software is provided 'as-is', without any express or implied
 * warranty. In no event shall the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Snes9x is freeware for PERSONAL USE only. Commercial users should
 * seek permission of the copyright holders first. Commercial use includes
 * charging money for Snes9x or software derived from Snes9x.
 *
 * The copyright holders request that bug fixes and improvements to the code
 * should be forwarded to them so everyone can benefit from the modifications
 * in future versions.
 *
 * Super NES and Super Nintendo Entertainment System are trademarks of
 * Nintendo Co., Limited and its subsidiary companies.
 */

// ARM V5 Assembly by bitrider

#include "snes9x.h"

#include "memmap.h"
#include "ppu.h"
#include "display.h"
#include "gfx.h"
#include "tile16.h"


extern uint32 HeadMask [4];
extern uint32 TailMask [5];

uint8 ConvertTile (uint8 *pCache, uint32 TileAddr)
{
    register uint8 *tp = &Memory.VRAM[TileAddr];
    uint32 *p = (uint32 *) pCache;
    uint32 non_zero = 0;
    uint8 line;
	uint32 p1;
	uint32 p2;
	register uint8 pix;

    switch (BG.BitShift)
    {
    case 8:
	for (line = 8; line != 0; line--, tp += 2)
	{
	    p1 = p2 = 0;
		if ((pix = *(tp + 0)))
	    {
		p1 |= odd_high[0][pix >> 4];
		p2 |= odd_low[0][pix & 0xf];
	    }
	    if ((pix = *(tp + 1)))
	    {
		p1 |= even_high[0][pix >> 4];
		p2 |= even_low[0][pix & 0xf];
	    }
	    if ((pix = *(tp + 16)))
	    {
		p1 |= odd_high[1][pix >> 4];
		p2 |= odd_low[1][pix & 0xf];
	    }
	    if ((pix = *(tp + 17)))
	    {
		p1 |= even_high[1][pix >> 4];
		p2 |= even_low[1][pix & 0xf];
	    }
	    if ((pix = *(tp + 32)))
	    {
		p1 |= odd_high[2][pix >> 4];
		p2 |= odd_low[2][pix & 0xf];
	    }
	    if ((pix = *(tp + 33)))
	    {
		p1 |= even_high[2][pix >> 4];
		p2 |= even_low[2][pix & 0xf];
	    }
	    if ((pix = *(tp + 48)))
	    {
		p1 |= odd_high[3][pix >> 4];
		p2 |= odd_low[3][pix & 0xf];
	    }
	    if ((pix = *(tp + 49)))
	    {
		p1 |= even_high[3][pix >> 4];
		p2 |= even_low[3][pix & 0xf];
	    }
	    *p++ = p1;
	    *p++ = p2;
	    non_zero |= p1 | p2;
	}
	break;

    case 4:
	for (line = 8; line != 0; line--, tp += 2)
	{
	    p1 = p2 = 0;
	    if ((pix = *(tp + 0)))
	    {
		p1 |= odd_high[0][pix >> 4];
		p2 |= odd_low[0][pix & 0xf];
	    }
	    if ((pix = *(tp + 1)))
	    {
		p1 |= even_high[0][pix >> 4];
		p2 |= even_low[0][pix & 0xf];
	    }
	    if ((pix = *(tp + 16)))
	    {
		p1 |= odd_high[1][pix >> 4];
		p2 |= odd_low[1][pix & 0xf];
	    }
	    if ((pix = *(tp + 17)))
	    {
		p1 |= even_high[1][pix >> 4];
		p2 |= even_low[1][pix & 0xf];
	    }
	    *p++ = p1;
	    *p++ = p2;
	    non_zero |= p1 | p2;
	}
	break;

    case 2:
	for (line = 8; line != 0; line--, tp += 2)
	{
	    p1 = p2 = 0;
	    if ((pix = *(tp + 0)))
	    {
		p1 |= odd_high[0][pix >> 4];
		p2 |= odd_low[0][pix & 0xf];
	    }
	    if ((pix = *(tp + 1)))
	    {
		p1 |= even_high[0][pix >> 4];
		p2 |= even_low[0][pix & 0xf];
	    }
	    *p++ = p1;
	    *p++ = p2;
	    non_zero |= p1 | p2;
	}
	break;
    }
    return (non_zero ? TRUE : BLANK_TILE);
}


inline void WRITE_4PIXELSHI16 (uint32 Offset, uint8 *Pixels)
{
    uint32 Pixel;
    uint16 *Screen = (uint16 *) GFX.S + Offset;
    uint8  *Depth = GFX.DB + Offset;

#define FN(N) \
    if (GFX.Z1 > Depth [N] && (Pixel = Pixels[2*N])) \
    { \
	Screen [N] = GFX.ScreenColors [Pixel]; \
	Depth [N] = GFX.Z2; \
    }

    FN(0)
    FN(1)
    FN(2)
    FN(3)
#undef FN
}

inline void WRITE_4PIXELSHI16_FLIPPED (uint32 Offset, uint8 *Pixels)
{
    uint32 Pixel;
    uint16 *Screen = (uint16 *) GFX.S + Offset;
    uint8  *Depth = GFX.DB + Offset;

#define FN(N) \
    if (GFX.Z1 > Depth [N] && (Pixel = Pixels[6 - 2*N])) \
    { \
	Screen [N] = GFX.ScreenColors [Pixel]; \
	Depth [N] = GFX.Z2; \
    }

    FN(0)
    FN(1)
    FN(2)
    FN(3)
#undef FN
}

static INLINE void WRITE_4PIXELS16x2 (uint32 Offset, uint8 *Pixels)
{
    register uint32 Pixel;
    uint16 *Screen = (uint16 *) GFX.S + Offset;
    uint8  *Depth = GFX.DB + Offset;

#define FN(N) \
    if (GFX.Z1 > Depth [N * 2] && (Pixel = Pixels[N])) \
    { \
	Screen [N * 2] = Screen [N * 2 + 1] = GFX.ScreenColors [Pixel]; \
	Depth [N * 2] = Depth [N * 2 + 1] = GFX.Z2; \
    }

    FN(0)
    FN(1)
    FN(2)
    FN(3)
#undef FN
}

static INLINE void WRITE_4PIXELS16_FLIPPEDx2 (uint32 Offset, uint8 *Pixels)
{
    register uint32 Pixel;
    uint16 *Screen = (uint16 *) GFX.S + Offset;
    uint8  *Depth = GFX.DB + Offset;

#define FN(N) \
    if (GFX.Z1 > Depth [N * 2] && (Pixel = Pixels[3 - N])) \
    { \
	Screen [N * 2] = Screen [N * 2 + 1] = GFX.ScreenColors [Pixel]; \
	Depth [N * 2] = Depth [N * 2 + 1] = GFX.Z2; \
    }

    FN(0)
    FN(1)
    FN(2)
    FN(3)
#undef FN
}

static INLINE void WRITE_4PIXELS16x2x2 (uint32 Offset, uint8 *Pixels)
{
    register uint32 Pixel;
    uint16 *Screen = (uint16 *) GFX.S + Offset;
    uint8  *Depth = GFX.DB + Offset;

#define FN(N) \
    if (GFX.Z1 > Depth [N * 2] && (Pixel = Pixels[N])) \
    { \
	Screen [N * 2] = Screen [N * 2 + 1] = Screen [(GFX_PITCH >> 1) + N * 2] = \
	    Screen [(GFX_PITCH >> 1) + N * 2 + 1] = GFX.ScreenColors [Pixel]; \
	Depth [N * 2] = Depth [N * 2 + 1] = Depth [(GFX_PITCH >> 1) + N * 2] = \
	    Depth [(GFX_PITCH >> 1) + N * 2 + 1] = GFX.Z2; \
    }

    FN(0)
    FN(1)
    FN(2)
    FN(3)
#undef FN
}

static INLINE void WRITE_4PIXELS16_FLIPPEDx2x2 (uint32 Offset, uint8 *Pixels)
{
    register uint32 Pixel;
    uint16 *Screen = (uint16 *) GFX.S + Offset;
    uint8  *Depth = GFX.DB + Offset;

#define FN(N) \
    if (GFX.Z1 > Depth [N * 2] && (Pixel = Pixels[3 - N])) \
    { \
	Screen [N * 2] = Screen [N * 2 + 1] = Screen [(GFX_PITCH >> 1) + N * 2] = \
	    Screen [(GFX_PITCH >> 1) + N * 2 + 1] = GFX.ScreenColors [Pixel]; \
	Depth [N * 2] = Depth [N * 2 + 1] = Depth [(GFX_PITCH >> 1) + N * 2] = \
	    Depth [(GFX_PITCH >> 1) + N * 2 + 1] = GFX.Z2; \
    }

    FN(0)
    FN(1)
    FN(2)
    FN(3)
#undef FN
}

// DrawTile16 -----------------------------------------
void DrawTile16 (uint32 Tile, uint32 Offset, uint32 StartLine, uint32 LineCount)
{
     TILE_PREAMBLE 

if (Tile & V_FLIP){
    if (!(Tile & H_FLIP)){
		__asm__ volatile (
		"2:					\n"
#define FN(p, p2, p3, p4)  \
			"	ldrb	r9, [%[depth], #" p "]		\n"\
			"	ldrb	r8, [%[depth], #" p3 "]		\n"\
			"	cmp	%[gfx_z1], r9			\n"\
			"	ldrhib	r9, [%[bp], #" p "]		\n"\
			"	bls	3f				\n"\
			"	movs	r9, r9, lsl #2			\n"\
			"	ldrne	r9, [%[colors], r9]		\n"\
			"	strneb	%[gfx_z2], [%[depth], #" p "]	\n"\
			"	strneh	r9, [%[screen], #" p2 "]	\n"\
			"3:						\n"\
			"	cmp	%[gfx_z1], r8			\n"\
			"	ldrhib	r9, [%[bp], #" p3 "]		\n"\
			"	bls	3f				\n"\
			"	movs	r9, r9, lsl #2			\n"\
			"	ldrne	r9, [%[colors], r9]		\n"\
			"	strneb	%[gfx_z2], [%[depth], #" p3 "]	\n"\
			"	strneh	r9, [%[screen], #" p4 "]	\n"\
			"3:						\n"

		FN("0", "0", "1", "2")
		FN("2", "4", "3", "6")
		FN("4", "8", "5", "10")
		FN("6", "12", "7", "14")
		// Loop	
		"	sub	%[bp], %[bp], #8		\n"	
		"	add	%[screen], %[screen], #640	\n" 
		"	add	%[depth], %[depth], #320	\n" 
		"	subs 	%[lcount], %[lcount], #1	\n"
		"	bne	2b"
		// output
		: 	// none	
		// input
		: [lcount] "r" (LineCount),
		  [gfx_z1] "r" (GFX.Z1),
		  [gfx_z2] "r" (GFX.Z2),
		  [screen] "r" ((uint16 *) GFX.S + Offset),
		  [colors] "r" (GFX.ScreenColors),
		  [depth] "r" (GFX.DB + Offset),
		  [bp] "r" (pCache + 56 - StartLine)
		// clobbered
		: "r9", "r8", "cc" // r8 & flags 				
		);
	} else {
		__asm__ volatile (
		"2:						\n"
#define FN1(p, p2, p3, p4, p5, p6)  \
			"	ldrb	r9, [%[depth], #" p "]		\n"\
			"	ldrb	r8, [%[depth], #" p4 "]		\n"\
			"	cmp	%[gfx_z1], r9			\n"\
			"	ldrhib	r9, [%[bp], #" p3 "]		\n"\
			"	bls	3f				\n"\
			"	movs	r9, r9, lsl #2			\n"\
			"	ldrne	r9, [%[colors], r9]		\n"\
			"	strneb	%[gfx_z2], [%[depth], #" p "]	\n"\
			"	strneh	r9, [%[screen], #" p2 "]	\n"\
			"3:						\n"\
			"	cmp	%[gfx_z1], r8			\n"\
			"	ldrhib	r9, [%[bp], #" p6 "]		\n"\
			"	bls	3f				\n"\
			"	movs	r9, r9, lsl #2			\n"\
			"	ldrne	r9, [%[colors], r9]		\n"\
			"	strneb	%[gfx_z2], [%[depth], #" p4 "]	\n"\
			"	strneh	r9, [%[screen], #" p5 "]	\n"\
			"3:						\n"

		FN1("0", "0", "7", "1", "2", "6")
		FN1("2", "4", "5", "3", "6", "4")
		FN1("4", "8", "3", "5", "10", "2")
		FN1("6", "12", "1", "7", "14", "0")	
		// Loop	
		"	sub	%[bp], %[bp], #8		\n"	
		"	add	%[screen], %[screen], #640	\n" 
		"	add	%[depth], %[depth], #320	\n" 
		"	subs 	%[lcount], %[lcount], #1	\n"
		"	bne	2b"
		// output
		: 	// none	
		// input
		: [lcount] "r" (LineCount),
		  [gfx_z1] "r" (GFX.Z1),
		  [gfx_z2] "r" (GFX.Z2),
		  [screen] "r" ((uint16 *) GFX.S + Offset),
		  [colors] "r" (GFX.ScreenColors),
		  [depth] "r" (GFX.DB + Offset),
		  [bp] "r" (pCache + 56 - StartLine)
		// clobbered
		: "r9", "r8", "cc" // r8 & flags 				
		);
	}
} else {
    if (!(Tile & H_FLIP)){
		__asm__ volatile (
		"2:					\n"
		FN("0", "0", "1", "2")
		FN("2", "4", "3", "6")
		FN("4", "8", "5", "10")
		FN("6", "12", "7", "14")
		// Loop	
		"	add	%[bp], %[bp], #8		\n"	
		"	add	%[screen], %[screen], #640	\n" 
		"	add	%[depth], %[depth], #320	\n" 
		"	subs 	%[lcount], %[lcount], #1	\n"
		"	bne	2b"
		// output
		: 	// none	
		// input
		: [lcount] "r" (LineCount),
		  [gfx_z1] "r" (GFX.Z1),
		  [gfx_z2] "r" (GFX.Z2),
		  [screen] "r" ((uint16 *) GFX.S + Offset),
		  [colors] "r" (GFX.ScreenColors),
		  [depth] "r" (GFX.DB + Offset),
		  [bp] "r" (pCache + StartLine)
		// clobbered
		: "r9", "r8", "cc" // r8 & flags 				
		);
	} else {
		__asm__ volatile (
		"2:						\n"
		FN1("0", "0", "7", "1", "2", "6")
		FN1("2", "4", "5", "3", "6", "4")
		FN1("4", "8", "3", "5", "10", "2")
		FN1("6", "12", "1", "7", "14", "0")	
		// Loop	
		"	add	%[bp], %[bp], #8		\n"	
		"	add	%[screen], %[screen], #640	\n" 
		"	add	%[depth], %[depth], #320	\n" 
		"	subs 	%[lcount], %[lcount], #1	\n"
		"	bne	2b"
		// output
		: 	// none	
		// input
		: [lcount] "r" (LineCount),
		  [gfx_z1] "r" (GFX.Z1),
		  [gfx_z2] "r" (GFX.Z2),
		  [screen] "r" ((uint16 *) GFX.S + Offset),
		  [colors] "r" (GFX.ScreenColors),
		  [depth] "r" (GFX.DB + Offset),
		  [bp] "r" (pCache + StartLine)
		// clobbered
		: "r9", "r8", "cc" // r8 & flags 				
		);

	}
   }
#undef FN
#undef FN1

}

// DrawClippedTile16 -----------------------------------------
void DrawClippedTile16 (uint32 Tile, uint32 Offset,
			uint32 StartPixel, uint32 Width,
			uint32 StartLine, uint32 LineCount)
{
if (Width == 0) return;

     TILE_PREAMBLE 

Offset = Offset + StartPixel;

if (Tile & V_FLIP){
    if (!(Tile & H_FLIP)){
		__asm__ volatile (
		"2:					\n"
#define FN(p)  \
			"	ldrb	r9, [%[depth], #" p "]		\n"\
			"	cmp	%[gfx_z1], r9			\n"\
			"	bls	3f				\n"\
			"	ldrb	r9, [%[bp], #" p "]		\n"\
			"	movs	r9, r9, lsl #2			\n"\
			"	ldrne	r9, [%[colors], r9]		\n"\
			"	strneb	%[gfx_z2], [%[depth], #" p "]	\n"\
			"	strneh	r9, [%[screen], #(" p " * 2)]	\n"\
			"3:						\n"

#define C(p)		"	cmp	%[width], #(" p  " + 1)		\n"\
			"	beq	1f				\n"

		FN("0")
		C("0")
		FN("1")
		C("1")
		FN("2")
		C("2")
		FN("3")
		C("3")
		FN("4") 
		C("4")
		FN("5")
		C("5")
		FN("6") 
		C("6")
		FN("7")
		// Loop	
		"1:						\n"	
		"	sub	%[bp], %[bp], #8		\n"	
		"	add	%[screen], %[screen], #640	\n" 
		"	add	%[depth], %[depth], #320	\n" 
		"	subs 	%[lcount], %[lcount], #1	\n"
		"	bne	2b"
		// output
		: 	// none	
		// input
		: [lcount] "r" (LineCount),
		  [gfx_z1] "r" (GFX.Z1),
		  [gfx_z2] "r" (GFX.Z2),
		  [screen] "r" ((uint16 *) GFX.S + Offset),
		  [colors] "r" (GFX.ScreenColors),
		  [depth] "r" (GFX.DB + Offset),
		  [width] "r" (Width),
		  [bp] "r" (pCache + 56 - StartLine + StartPixel)
		// clobbered
		: "r9", "cc" // r8 & flags 				
		);
	} else {
		__asm__ volatile (
		"2:					\n"
#define FN1(p)  \
			"	ldrb	r9, [%[depth], #" p "]		\n"\
			"	cmp	%[gfx_z1], r9			\n"\
			"	bls	3f				\n"\
			"	ldrb	r9, [%[bp], #(7 - " p ")]	\n"\
			"	movs	r9, r9, lsl #2			\n"\
			"	ldrne	r9, [%[colors], r9]		\n"\
			"	strneb	%[gfx_z2], [%[depth], #" p "]	\n"\
			"	strneh	r9, [%[screen], #(" p " * 2)]	\n"\
			"3:						\n"\

		FN1("0")
		C("0")
		FN1("1")
		C("1")
		FN1("2")
		C("2")
		FN1("3")
		C("3")
		FN1("4") 
		C("4")
		FN1("5")
		C("5")
		FN1("6") 
		C("6")
		FN1("7")
		// Loop	
		"1:						\n"	
		"	sub	%[bp], %[bp], #8		\n"	
		"	add	%[screen], %[screen], #640	\n" 
		"	add	%[depth], %[depth], #320	\n" 
		"	subs 	%[lcount], %[lcount], #1	\n"
		"	bne	2b"
		// output
		: 	// none	
		// input
		: [lcount] "r" (LineCount),
		  [gfx_z1] "r" (GFX.Z1),
		  [gfx_z2] "r" (GFX.Z2),
		  [screen] "r" ((uint16 *) GFX.S + Offset),
		  [colors] "r" (GFX.ScreenColors),
		  [depth] "r" (GFX.DB + Offset),
		  [width] "r" (Width),
		  [bp] "r" (pCache + 56 - StartLine - StartPixel)
		// clobbered
		: "r9", "cc" // r8 & flags 				
		);
	}
} else {
    if (!(Tile & H_FLIP)){
		__asm__ volatile (
		"2:					\n"
		FN("0")
		C("0")
		FN("1")
		C("1")
		FN("2")
		C("2")
		FN("3")
		C("3")
		FN("4") 
		C("4")
		FN("5")
		C("5")
		FN("6") 
		C("6")
		FN("7")
		// Loop	
		"1:						\n"
		"	add	%[bp], %[bp], #8		\n"	
		"	add	%[screen], %[screen], #640	\n" 
		"	add	%[depth], %[depth], #320	\n" 
		"	subs 	%[lcount], %[lcount], #1	\n"
		"	bne	2b"
		// output
		: 	// none	
		// input
		: [lcount] "r" (LineCount),
		  [gfx_z1] "r" (GFX.Z1),
		  [gfx_z2] "r" (GFX.Z2),
		  [screen] "r" ((uint16 *) GFX.S + Offset),
		  [colors] "r" (GFX.ScreenColors),
		  [depth] "r" (GFX.DB + Offset),
		  [width] "r" (Width),
		  [bp] "r" (pCache + StartLine + StartPixel)
		// clobbered
		: "r9", "cc" // r8 & flags 				
		);
	} else {
		__asm__ volatile (
		"2:					\n"
		FN1("0")
		C("0")
		FN1("1")
		C("1")
		FN1("2")
		C("2")
		FN1("3")
		C("3")
		FN1("4") 
		C("4")
		FN1("5")
		C("5")
		FN1("6") 
		C("6")
		FN1("7")
		// Loop	
		"1:						\n"	
		"	add	%[bp], %[bp], #8		\n"	
		"	add	%[screen], %[screen], #640	\n" 
		"	add	%[depth], %[depth], #320	\n" 
		"	subs 	%[lcount], %[lcount], #1	\n"
		"	bne	2b"
		// output
		: 	// none	
		// input
		: [lcount] "r" (LineCount),
		  [gfx_z1] "r" (GFX.Z1),
		  [gfx_z2] "r" (GFX.Z2),
		  [screen] "r" ((uint16 *) GFX.S + Offset),
		  [colors] "r" (GFX.ScreenColors),
		  [depth] "r" (GFX.DB + Offset),
		  [width] "r" (Width),
		  [bp] "r" (pCache + StartLine - StartPixel)
		// clobbered
		: "r9", "cc" // r8 & flags 				
		);

	}
   }
#undef FN
#undef FN1
#undef C

}


void DrawTile16x2 (uint32 Tile, uint32 Offset, uint32 StartLine,
		   uint32 LineCount)
{
    TILE_PREAMBLE
    register uint8 *bp;

    RENDER_TILE(WRITE_4PIXELS16x2, WRITE_4PIXELS16_FLIPPEDx2, 8)
}

void DrawClippedTile16x2 (uint32 Tile, uint32 Offset,
			  uint32 StartPixel, uint32 Width,
			  uint32 StartLine, uint32 LineCount)
{
    TILE_PREAMBLE
    register uint8 *bp;

    TILE_CLIP_PREAMBLE
    RENDER_CLIPPED_TILE(WRITE_4PIXELS16x2, WRITE_4PIXELS16_FLIPPEDx2, 8)
}

void DrawTile16x2x2 (uint32 Tile, uint32 Offset, uint32 StartLine,
		     uint32 LineCount)
{
    TILE_PREAMBLE
    register uint8 *bp;

    RENDER_TILE(WRITE_4PIXELS16x2x2, WRITE_4PIXELS16_FLIPPEDx2x2, 8)
}

void DrawClippedTile16x2x2 (uint32 Tile, uint32 Offset,
			    uint32 StartPixel, uint32 Width,
			    uint32 StartLine, uint32 LineCount)
{
    TILE_PREAMBLE
    register uint8 *bp;

    TILE_CLIP_PREAMBLE
    RENDER_CLIPPED_TILE(WRITE_4PIXELS16x2x2, WRITE_4PIXELS16_FLIPPEDx2x2, 8)
}

void DrawLargePixel16 (uint32 Tile, uint32 Offset,
		       uint32 StartPixel, uint32 Pixels,
		       uint32 StartLine, uint32 LineCount)
{
    TILE_PREAMBLE

    register uint16 *sp = (uint16 *) GFX.S + Offset;
    uint8  *Depth = GFX.DB + Offset;
    uint16 pixel;

#define PLOT_PIXEL(screen, pixel) (pixel)

    RENDER_TILE_LARGE (GFX.ScreenColors [pixel], PLOT_PIXEL)
}


void DrawLargePixel16Add (uint32 Tile, uint32 Offset,
			  uint32 StartPixel, uint32 Pixels,
			  uint32 StartLine, uint32 LineCount)
{
    TILE_PREAMBLE

    register uint16 *sp = (uint16 *) GFX.S + Offset;
    uint8  *Depth = GFX.ZBuffer + Offset;
    register uint16 pixel;

#define LARGE_ADD_PIXEL(s, p) \
(Depth [z + GFX.DepthDelta] ? (Depth [z + GFX.DepthDelta] != 1 ? \
			       COLOR_ADD (p, *(s + GFX.Delta))    : \
			       COLOR_ADD (p, GFX.FixedColour)) \
			    : p)
			      
    RENDER_TILE_LARGE (GFX.ScreenColors [pixel], LARGE_ADD_PIXEL)
}

void DrawLargePixel16Add1_2 (uint32 Tile, uint32 Offset,
			     uint32 StartPixel, uint32 Pixels,
			     uint32 StartLine, uint32 LineCount)
{
    TILE_PREAMBLE

    register uint16 *sp = (uint16 *) GFX.S + Offset;
    uint8  *Depth = GFX.ZBuffer + Offset;
    register uint16 pixel;

#define LARGE_ADD_PIXEL1_2(s, p) \
((uint16) (Depth [z + GFX.DepthDelta] ? (Depth [z + GFX.DepthDelta] != 1 ? \
			       COLOR_ADD1_2 (p, *(s + GFX.Delta))    : \
			       COLOR_ADD (p, GFX.FixedColour)) \
			    : p))
			      
    RENDER_TILE_LARGE (GFX.ScreenColors [pixel], LARGE_ADD_PIXEL1_2)
}

void DrawLargePixel16Sub (uint32 Tile, uint32 Offset,
			  uint32 StartPixel, uint32 Pixels,
			  uint32 StartLine, uint32 LineCount)
{
    TILE_PREAMBLE

    register uint16 *sp = (uint16 *) GFX.S + Offset;
    uint8  *Depth = GFX.ZBuffer + Offset;
    register uint16 pixel;

#define LARGE_SUB_PIXEL(s, p) \
(Depth [z + GFX.DepthDelta] ? (Depth [z + GFX.DepthDelta] != 1 ? \
			       COLOR_SUB (p, *(s + GFX.Delta))    : \
			       COLOR_SUB (p, GFX.FixedColour)) \
			    : p)
			      
    RENDER_TILE_LARGE (GFX.ScreenColors [pixel], LARGE_SUB_PIXEL)
}

void DrawLargePixel16Sub1_2 (uint32 Tile, uint32 Offset,
			     uint32 StartPixel, uint32 Pixels,
			     uint32 StartLine, uint32 LineCount)
{
    TILE_PREAMBLE

    register uint16 *sp = (uint16 *) GFX.S + Offset;
    uint8  *Depth = GFX.ZBuffer + Offset;
    uint16 pixel;

#define LARGE_SUB_PIXEL1_2(s, p) \
(Depth [z + GFX.DepthDelta] ? (Depth [z + GFX.DepthDelta] != 1 ? \
			       COLOR_SUB1_2 (p, *(s + GFX.Delta))    : \
			       COLOR_SUB (p, GFX.FixedColour)) \
			    : p)
			      
    RENDER_TILE_LARGE (GFX.ScreenColors [pixel], LARGE_SUB_PIXEL1_2)
}

void DrawHiResTile16 (uint32 Tile, uint32 Offset, uint32 StartLine,
	         uint32 LineCount)
{
    TILE_PREAMBLE
    register uint8 *bp;

    RENDER_TILEHI(WRITE_4PIXELSHI16, WRITE_4PIXELSHI16_FLIPPED, 4)
}

void DrawHiResClippedTile16 (uint32 Tile, uint32 Offset,
			uint32 StartPixel, uint32 Width,
			uint32 StartLine, uint32 LineCount)
{
    TILE_PREAMBLE
    register uint8 *bp;

    TILE_CLIP_PREAMBLE
    RENDER_CLIPPED_TILEHI(WRITE_4PIXELSHI16, WRITE_4PIXELSHI16_FLIPPED, 4)
}