psxsdk/libpsx/src/gpu.c

// PSXSDK Graphics Processing Unit (GPU) / Graphics Synthesizer (GS)
// Routines

#include <psx.h>
#include <stdio.h>
#include <strings.h>
#include "font.h"
#include "costbl.h"

extern volatile int __psxsdk_gpu_dma_finished;

static unsigned int *linked_list;
static unsigned int linked_list_pos;

int fb_font_x, fb_font_y, fb_font_cx, fb_font_cy;

static unsigned int prfont_flags = 0;
static int prfont_scale_x = 0;
static int prfont_scale_y = 0;
static unsigned char prfont_rl = NORMAL_LUMINANCE;
static unsigned char prfont_gl = NORMAL_LUMINANCE;
static unsigned char prfont_bl = NORMAL_LUMINANCE;

unsigned short GsScreenW;
unsigned short GsScreenH;
unsigned char GsScreenM;

unsigned short GsCurDrawEnvW;
unsigned short GsCurDrawEnvH;

double gs_vbuf[4][3];

static int __gs_autowait = 0;

unsigned int PRFONT_SCALEX(int i)
{
	prfont_scale_x = i;
	return PRFONT_SCALE;
}

unsigned int PRFONT_SCALEY(int i)
{
	prfont_scale_y = i;
	return PRFONT_SCALE;
}

unsigned int PRFONT_RL(unsigned char f)
{
	prfont_rl = f;
	return PRFONT_COLOR;
}

unsigned int PRFONT_GL(unsigned char f)
{
	prfont_gl = f;
	return PRFONT_COLOR;
}

unsigned int PRFONT_BL(unsigned char f)
{
	prfont_bl = f;
	return PRFONT_COLOR;
}

unsigned int draw_mode_packet;

unsigned int setup_attribs(unsigned char tpage, unsigned int attribute, unsigned char *packet);
static void gs_internal_vector_rotate(int x_a, int y_a, int z_a, double *v, double *n);

static char gpu_stringbuf[512];

int gs_calculate_scaled_size(int size, int scale)
{
	if(scale > 8)
		return (size * scale) / SCALE_ONE;
	else if(scale == 0)
		return size;
	else if(scale > 0)
		return size * scale;
	else if(scale > -8)
		return size / (scale * -1);

	return (size * SCALE_ONE) / -scale;
}

void GsSetList(unsigned int *listptr)
{
	linked_list = listptr;
	linked_list_pos = 0;
}

void GsDrawList()
{
	if(PSX_GetInitFlags() & PSX_INIT_NOBIOS)
	{
// DMA is unreliable right now, use PIO.
		GsDrawListPIO();
		return;
	}

	//int x = 0;

	/* Put a terminator, so the link listed ends. */
	linked_list[linked_list_pos] = 0x00ffffff;

//	do{printf("linked_list[%d] = %08x\n", x, linked_list[x]);}while(linked_list[x++]!=0xffffff);

	//#warning "Let's hope this works well."

	while(!(GPU_CONTROL_PORT & (1<<0x1a))); /* Wait for the GPU to finish
						 * drawing primitives. */
	while(!(GPU_CONTROL_PORT & (1<<0x1c))); /* Wait for the GPU to be free */

	gpu_ctrl(4, 2); // DMA CPU->GPU mode
	D2_MADR = (unsigned int)linked_list;
	D2_BCR = 0;
	D2_CHCR = (1<<0xa)|1|(1<<0x18);

	linked_list_pos = 0;

	//if(PSX_GetInitFlags() & PSX_INIT_NOBIOS)
	//	__psxsdk_gpu_dma_finished = 0;

	if(__gs_autowait)
		while(GsIsDrawing());
}

void GsDrawListPIO()
{
	//linked_list[linked_list_pos] = 0x00ffffff;
	int pos = 0;
	int sz = 0;
	int x;

	while(!(GPU_CONTROL_PORT & (1<<0x1c)));
	// Disable DMA
	GPU_CONTROL_PORT = 0x04000000;


	while(pos < linked_list_pos)
	{
		while(!(GPU_CONTROL_PORT & (1<<0x1c)));

		GPU_DATA_PORT = 0x01000000; // Reset data port

		sz = linked_list[pos++] >> 24;

		for(x = 0; x < sz; x++)
			GPU_DATA_PORT = linked_list[pos++];
	}

	linked_list_pos = 0;
//	GPU_DATA_PORT = 0xE6000000; // Disable masking stuff
//	gpu_data_ctrl(2, ((b&0xff)<<16)|((g&0xff)<<8)|r);
//	GPU_DATA_PORT = (y<<16)|x;
//	GPU_DATA_PORT = (h<<16)|w;
	if(__gs_autowait)
		while(GsIsDrawing());
}

void GsSortPoly3(const GsPoly3 *poly3)
{
	int orig_pos = linked_list_pos;
	int x;
	unsigned char pkt = 0x20;
	unsigned int md;

	md = setup_attribs(0, poly3->attribute, &pkt);

	linked_list[linked_list_pos++] = 0x05000000;
	linked_list[linked_list_pos++] = md;
	linked_list[linked_list_pos++] = (pkt<<24)|(poly3->b<<16)|(poly3->g<<8)|(poly3->r);

	for(x = 0; x < 3; x++)
		linked_list[linked_list_pos++] = ((poly3->y[x]&0x7ff)<<16)|(poly3->x[x]&0x7ff);

	linked_list[orig_pos] |= ((unsigned int)&linked_list[linked_list_pos]) & 0xffffff;
}

void GsSortPoly4(const GsPoly4 *poly4)
{
	int orig_pos = linked_list_pos;
	int x;
	unsigned char pkt = 0x28;
	unsigned int md;

	md = setup_attribs(0, poly4->attribute, &pkt);

	linked_list[linked_list_pos++] = 0x06000000;
	linked_list[linked_list_pos++] = md;
	linked_list[linked_list_pos++] = (pkt<<24)|(poly4->b<<16)|(poly4->g<<8)|(poly4->r);

	for(x = 0; x < 4; x++)
		linked_list[linked_list_pos++] = ((poly4->y[x]&0x7ff)<<16)|(poly4->x[x]&0x7ff);

	linked_list[orig_pos] |= ((unsigned int)&linked_list[linked_list_pos]) & 0xffffff;
}

void GsSortGPoly3(const GsGPoly3 *poly3)
{
	// PKT 0x30

	int orig_pos = linked_list_pos;
	int x;
	unsigned char pkt = 0x30;
	unsigned int md;

	md = setup_attribs(0, poly3->attribute, &pkt);

	linked_list[linked_list_pos++] = 0x07000000;
	linked_list[linked_list_pos++] = md;

	for(x = 0; x < 3; x++)
	{
		linked_list[linked_list_pos++] = (poly3->b[x]<<16)|(poly3->g[x]<<8)|(poly3->r[x]) | ((x == 0)?(pkt<<24):0);
		linked_list[linked_list_pos++] = ((poly3->y[x]&0x7ff)<<16)|(poly3->x[x]&0x7ff);
	}

	linked_list[orig_pos] |= ((unsigned int)&linked_list[linked_list_pos]) & 0xffffff;
}

void GsSortGPoly4(const GsGPoly4 *poly4)
{
	// PKT 0x38

	int orig_pos = linked_list_pos;
	int x;
	unsigned char pkt = 0x38;
	unsigned int md;

	md = setup_attribs(0, poly4->attribute, &pkt);

	linked_list[linked_list_pos++] = 0x09000000;
	linked_list[linked_list_pos++] = md;

	for(x = 0; x < 4; x++)
	{
		linked_list[linked_list_pos++] = (poly4->b[x]<<16)|(poly4->g[x]<<8)|(poly4->r[x]) | ((x == 0)?(pkt<<24):0);
		linked_list[linked_list_pos++] = ((poly4->y[x]&0x7ff)<<16)|(poly4->x[x]&0x7ff);
	}

	linked_list[orig_pos] |= ((unsigned int)&linked_list[linked_list_pos]) & 0xffffff;
}

void GsSortLine(const GsLine *line)
{
	// PKT 0x40

	int orig_pos = linked_list_pos;
	int x;
	unsigned char pkt = 0x40;
	unsigned int md;

	md = setup_attribs(0, line->attribute, &pkt);

	linked_list[linked_list_pos++] = 0x04000000;
	linked_list[linked_list_pos++] = md;
	linked_list[linked_list_pos++] = (pkt<<24)|(line->b<<16)|(line->g<<8)|(line->r);

	for(x = 0; x < 2; x++)
		linked_list[linked_list_pos++] = ((line->y[x]&0x7ff)<<16)|(line->x[x]&0x7ff);

	linked_list[orig_pos] |= ((unsigned int)&linked_list[linked_list_pos]) & 0xffffff;
}

void GsSortGLine(const GsGLine *line)
{
	// PKT 0x50

	int orig_pos = linked_list_pos;
	int x;
	unsigned char pkt = 0x50;
	unsigned int md;

	md = setup_attribs(0, line->attribute, &pkt);

	linked_list[linked_list_pos++] = 0x05000000;
	linked_list[linked_list_pos++] = md;

	for(x=0;x<2;x++)
	{
		linked_list[linked_list_pos++] = (line->b[x]<<16)|(line->g[x]<<8)|(line->r[x])|((x == 0)?(pkt<<24):0);
		linked_list[linked_list_pos++] = ((line->y[x]&0x7ff)<<16)|(line->x[x] & 0x7ff);
	}

	linked_list[orig_pos] |= ((unsigned int)&linked_list[linked_list_pos]) & 0xffffff;
}

void GsSortDot(const GsDot *dot)
{
	// PKT 0x68

	int orig_pos = linked_list_pos;
	unsigned char pkt = 0x68;
	unsigned int md;

	md = setup_attribs(0, dot->attribute, &pkt);

	linked_list[linked_list_pos++] = 0x03000000;
	linked_list[linked_list_pos++] = md;
	linked_list[linked_list_pos++] = (pkt<<24)|(dot->b<<16)|(dot->g<<8)|(dot->r);
	linked_list[linked_list_pos++] = ((dot->y&0x7ff)<<16)|(dot->x&0x7ff);

	linked_list[orig_pos] |= ((unsigned int)&linked_list[linked_list_pos]) & 0xffffff;
}

void GsSortSprite(const GsSprite *sprite)
{
	GsTPoly4 tpoly4;
	int x, y;
	int sx = sprite->x & 0x7ff;
	int sy = sprite->y & 0x7ff;
	int mcx, mcy;

	/*if(sprite->w > 256)
		sprite->w = 256;

	if(sprite->h > 256)
		sprite->h = 256;*/

	// If "sprite" has no flipping and no scaling use sprite primitive
	// otherwise manipulate a 4 point textured polygon primitive

	if(sprite->rotate != 0)
	{
		tpoly4.u[0] = sprite->u;
		tpoly4.v[0] = sprite->v;

		tpoly4.u[1] = sprite->u;
		tpoly4.v[1] = sprite->v + sprite->h;

		tpoly4.u[2] = sprite->u + sprite->w;
		tpoly4.v[2] = sprite->v;

		tpoly4.u[3] = sprite->u + sprite->w;
		tpoly4.v[3] = sprite->v + sprite->h;

		gs_vbuf[0][2] = gs_vbuf[1][2] = gs_vbuf[2][2] = gs_vbuf[3][2] = 0;

		mcx = sprite->mx + sprite->x;
		mcy = sprite->my + sprite->y;

		gs_vbuf[0][0] = -(mcx - sprite->x);
		gs_vbuf[0][1] = (mcy - sprite->y);

		gs_vbuf[1][0] = -(mcx - sprite->x);
		gs_vbuf[1][1] = (mcy - (sprite->y + gs_calculate_scaled_size(sprite->h, sprite->scaley)));

		gs_vbuf[2][0] =  -(mcx - (sprite->x + gs_calculate_scaled_size(sprite->w, sprite->scalex)));
		gs_vbuf[2][1] = (mcy - sprite->y);

		gs_vbuf[3][0] =  -(mcx - (sprite->x + gs_calculate_scaled_size(sprite->w, sprite->scalex)));
		gs_vbuf[3][1] = (mcy - (sprite->y + gs_calculate_scaled_size(sprite->h, sprite->scaley)));

		for(x = 0; x < 4; x++)
		{
			gs_internal_vector_rotate(0, 0, sprite->rotate, gs_vbuf[x], gs_vbuf[x]);
			tpoly4.x[x] = mcx + gs_vbuf[x][0];
			tpoly4.y[x] = mcy + gs_vbuf[x][1];
		}

		tpoly4.r = sprite->r;
		tpoly4.g = sprite->g;
		tpoly4.b = sprite->b;
		tpoly4.attribute = sprite->attribute;
		tpoly4.tpage = sprite->tpage;
		tpoly4.cx = sprite->cx;
		tpoly4.cy = sprite->cy;

		GsSortTPoly4(&tpoly4);
	}
	else if((sprite->attribute & (H_FLIP|V_FLIP)) ||
		sprite->scalex != 0 || sprite->scaley != 0)
	{
		x = sprite->w;
		if(x>256)x=256;

		y = sprite->h;
		if(y>256)y=256;

		if(sprite->scalex > 8)
		{
			x *= sprite->scalex;
			x /= 4096;
		}
		else
		{
			if(sprite->scalex >= 2)
				x*=sprite->scalex;
			else if(sprite->scalex <= -2)
				x/=-sprite->scalex;
		}

		if(sprite->scaley > 8)
		{
			y *= sprite->scaley;
			y /= 4096;
		}
		else
		{
			if(sprite->scaley >= 2)
				y*=sprite->scaley;
			else if(sprite->scaley <= -2)
				y/=-sprite->scaley;
		}

		tpoly4.x[0] = tpoly4.x[1] = sx;
		tpoly4.x[2] = tpoly4.x[3] = (sx + x);
		tpoly4.y[0] = tpoly4.y[2] = sy;
		tpoly4.y[1] = tpoly4.y[3] = (sy + y);

		if(sprite->attribute &  H_FLIP)
		{
			tpoly4.u[0] = tpoly4.u[1] = (sprite->u + sprite->w) - 1;
			tpoly4.u[2] = tpoly4.u[3] = sprite->u;
		}
		else
		{
			tpoly4.u[0] = tpoly4.u[1] = sprite->u;
			tpoly4.u[2] = tpoly4.u[3] = (sprite->u + sprite->w);
		}

		if(sprite->attribute & V_FLIP)
		{
			tpoly4.v[0] = tpoly4.v[2] = (sprite->v + sprite->h) - 1;
			tpoly4.v[1] = tpoly4.v[3] = sprite->v;
		}
		else
		{
			tpoly4.v[0] = tpoly4.v[2] = sprite->v;
			tpoly4.v[1] = tpoly4.v[3] = (sprite->v + sprite->h);
		}

		tpoly4.r = sprite->r;
		tpoly4.g = sprite->g;
		tpoly4.b = sprite->b;
		tpoly4.attribute = sprite->attribute;
		tpoly4.tpage = sprite->tpage;
		tpoly4.cx = sprite->cx;
		tpoly4.cy = sprite->cy;

		GsSortTPoly4(&tpoly4);
	}
	else
	{
		GsSortSimpleSprite(sprite);
	}
}

void GsSortSimpleSprite(const GsSprite *sprite)
{
	unsigned int orig_pos = linked_list_pos;
	unsigned char pkt = 0x64;
	unsigned int md;

	md = setup_attribs(sprite->tpage, sprite->attribute, &pkt);

	linked_list[linked_list_pos++] = 0x05000000;
	linked_list[linked_list_pos++] = md;
	linked_list[linked_list_pos++] = (pkt<<24)|(sprite->b<<16)|(sprite->g<<8)|sprite->r;
	linked_list[linked_list_pos++] = ((sprite->y&0x7ff)<<16)|(sprite->x&0x7ff);
	linked_list[linked_list_pos++] = (get_clutid(sprite->cx,sprite->cy)<<16)|(sprite->v<<8)|sprite->u;
	linked_list[linked_list_pos++] = (sprite->h<<16)|sprite->w;

	linked_list[orig_pos] |= ((unsigned int)&linked_list[linked_list_pos]) & 0xffffff;
}

void GsSortRectangle(const GsRectangle *rectangle)
{
	unsigned int orig_pos = linked_list_pos;
	unsigned char pkt = 0x60;
	unsigned int md;

	md = setup_attribs(0, rectangle->attribute, &pkt);

	linked_list[linked_list_pos++] = 0x04000000;
	linked_list[linked_list_pos++] = md;
	linked_list[linked_list_pos++] = (pkt<<24)|(rectangle->b<<16)|(rectangle->g<<8)|(rectangle->r);
	linked_list[linked_list_pos++] = ((rectangle->y&0x7ff)<<16)|(rectangle->x&0x7ff);
	linked_list[linked_list_pos++] = (rectangle->h<<16)|rectangle->w;

	linked_list[orig_pos] |= ((unsigned int)&linked_list[linked_list_pos]) & 0xffffff;
}

void GsSortTPoly4(const GsTPoly4 *tpoly4)
{
	unsigned int orig_pos = linked_list_pos;
	unsigned char pkt = 0x2c;
	unsigned int md;

	/*md = setup_attribs(tpoly4->tpage, tpoly4->attribute, &pkt);*/

	//printf("tpoly4->tpage = %d\n", tpoly4->tpage);

	md = setup_attribs(tpoly4->tpage, tpoly4->attribute, &pkt);

	//printf("pkt = %x\n", pkt);

	linked_list[linked_list_pos++] = 0x09000000;
	//linked_list[linked_list_pos++] = md;
	//linked_list[linked_list_pos++] = 0xe0000000;
	//linked_list[linked_list_pos++] = 0xe1000105;

	//printf("tpoly4 md: %08x\n", md);
	linked_list[linked_list_pos++] = (pkt<<24)|(tpoly4->b<<16)|(tpoly4->g<<8)|(tpoly4->r);
	linked_list[linked_list_pos++] = ((tpoly4->y[0]&0x7ff)<<16)|(tpoly4->x[0]&0x7ff);
	linked_list[linked_list_pos++] = (get_clutid(tpoly4->cx, tpoly4->cy)<<16)|(tpoly4->v[0]<<8)|tpoly4->u[0];
	linked_list[linked_list_pos++] = ((tpoly4->y[1]&0x7ff)<<16)|(tpoly4->x[1]&0x7ff);
	linked_list[linked_list_pos++] = (md << 16)|(tpoly4->v[1]<<8)|tpoly4->u[1];
	linked_list[linked_list_pos++] = ((tpoly4->y[2]&0x7ff)<<16)|(tpoly4->x[2]&0x7ff);
	linked_list[linked_list_pos++] = (tpoly4->v[2]<<8)|tpoly4->u[2];
	linked_list[linked_list_pos++] = ((tpoly4->y[3]&0x7ff)<<16)|(tpoly4->x[3]&0x7ff);
	linked_list[linked_list_pos++] = (tpoly4->v[3]<<8)|tpoly4->u[3];

	linked_list[orig_pos] |= ((unsigned int)&linked_list[linked_list_pos]) & 0xffffff;
}

void GsSortTPoly3(const GsTPoly3 *tpoly3)
{
	int orig_pos = linked_list_pos;
	int x;
	unsigned char pkt = 0x24;
	unsigned int md;

	md = setup_attribs(tpoly3->tpage, tpoly3->attribute, &pkt);

	linked_list[linked_list_pos++] = 0x07000000;
	linked_list[linked_list_pos++] =
		(pkt<<24)|(tpoly3->b<<16)|(tpoly3->g<<8)|(tpoly3->r);

	for(x = 0; x < 3; x++)
	{
		linked_list[linked_list_pos++] = ((tpoly3->y[x]&0x7ff)<<16)|(tpoly3->x[x]&0x7ff);
		linked_list[linked_list_pos] = (tpoly3->u[x]<<8)|tpoly3->v[x];

		switch(x)
		{
			case 0:
				linked_list[linked_list_pos++] |=
					get_clutid(tpoly3->cx, tpoly3->cy) << 16;
			break;
			case 1:
				linked_list[linked_list_pos++] |=
					md << 16;
			break;
			default:
				linked_list_pos++;
			break;
		}
	}

	linked_list[orig_pos] |= ((unsigned int)&linked_list[linked_list_pos]) & 0xffffff;
}

void MoveImage(int src_x, int src_y, int dst_x, int dst_y, int w, int h)
{
	/*
	 * This seems more like "CopyImage"...
	 */

	while(!(GPU_CONTROL_PORT & (1<<0x1c)));

	GPU_CONTROL_PORT = 0x04000000;
	GPU_DATA_PORT = 0x01000000; // Reset command buffer
	GPU_DATA_PORT = 0xE6000000;
	GPU_DATA_PORT = 0x80000000;
	GPU_DATA_PORT = (src_y<<16)|src_x;
	GPU_DATA_PORT = (dst_y<<16)|dst_x;
	GPU_DATA_PORT = (h<<16)|w;
}

/*
 * Add a method to add arbitrary data to the packet list
 */

void LoadImage(const void *img, int x, int y, int w, int h)
{
	unsigned short *image = (unsigned short*)img;
	int a, l;

	//printf("LoadImage: %d, %d, %d, %d\n", x, y, w, h);

	while(!(GPU_CONTROL_PORT & (1<<0x1c)));

	GPU_CONTROL_PORT = 0x04000000; // Disable DMA

// Reset should be on data port ! otherwise we won't be able
// to write CLUTs for some time after they've been used!
// (why??)

	GPU_DATA_PORT = 0x01000000;
	GPU_DATA_PORT = 0xE6000000; // disable masking stuff !!
	GPU_DATA_PORT = 0xA0000000;
	GPU_DATA_PORT = (y<<16)|x;
	GPU_DATA_PORT = (h<<16)|w;

	l = w*h;
	if(l&1)l++;

	for(a = 0; a < l; a+=2)
		GPU_DATA_PORT = image[a]|(image[a+1]<<16);

	GPU_CONTROL_PORT = 0x01000000;
//	while(!(GPU_CONTROL_PORT & (1<<0x1c)));
}

void GsUploadCLUT(const GsImage * image)
{
    LoadImage(  image->clut_data, image->clut_x, image->clut_y,
                image->clut_w, image->clut_h    );
}

/*void LoadImage(void *img, int x, int y, int w, int h)
{
	GPU_dw(x, y, w, h, img);

	int l;

	printf("LoadImage: %d, %d, %d, %d\n", x, y, w, h);

	l = w*h;
	if(l&1)l++;
	l/=2;

	while(!(GPU_CONTROL_PORT & (1<<0x1c))); // Wait for the GPU to be free

	gpu_ctrl(4, 2); // DMA CPU->GPU mode
	D2_MADR = (unsigned int)img;
	D2_BCR = (l << 16) | 1;
	D2_CHCR = 0x01000201;

	// Wait for DMA to finish

	while(D2_CHCR & (1<<0x18));
//}*/

void GsSetDrawEnv(const GsDrawEnv *drawenv)
{
	int end_y, end_x;
	int mf;

	/*
	 * Store the 0xe1 packet - we need it because we have to
	 * modify drawing environment for sprites
	 */

	draw_mode_packet = (0xe1<<24)|(drawenv->draw_on_display>=1)<<10|
		(drawenv->dither>=1)<<9;

	gpu_data_ctrl(0xe1, draw_mode_packet);
	gpu_data_ctrl(0xe2, 0);
	gpu_data_ctrl(0xe3, (drawenv->y<<10)|drawenv->x);

	end_x = (drawenv->x + drawenv->w)-1;
	end_y = (drawenv->y + drawenv->h)-1;

	gpu_data_ctrl(0xe4, (end_y<<10)|end_x);

	//#warning "Check drawing offset better."
	gpu_data_ctrl(0xe5, (drawenv->y<<11)|drawenv->x);
	//gpu_data_ctrl(0xe5, 0);


	mf = 0;
	if(drawenv->set_mask) mf|=MASK_SET;
	if(drawenv->ignore_mask) mf|=MASK_IGNORE;

	GsSetMasking(mf);

	GsCurDrawEnvW = drawenv->w;
	GsCurDrawEnvH = drawenv->h;
}

void GsSetDrawEnv_DMA(const GsDrawEnv* drawenv)
{
    unsigned int orig_pos = linked_list_pos;

    linked_list[linked_list_pos++] = 0x05000000;

    linked_list[linked_list_pos++] = (0xE1 << 24) |(drawenv->draw_on_display>=1)<<10|(drawenv->dither>=1)<<9;
    linked_list[linked_list_pos++] = (0xE2 << 24);
    linked_list[linked_list_pos++] = ((0xE3 << 24) | (drawenv->x & 0x7FF) | ((drawenv->y & 0x3FF) << 10));
    linked_list[linked_list_pos++] = ((0xE4 << 24) | ((drawenv->x + drawenv->w - 1) & 0x3FF) | (((drawenv->y + drawenv->h - 1) & 0x3FF) << 10));
    linked_list[linked_list_pos++] = ((0xE5 << 24) | ((drawenv->x) & 0x7FF) | (((drawenv->y ) & 0x7FF) << 11));

    linked_list[orig_pos] |= ((unsigned int)&linked_list[linked_list_pos]) & 0xffffff;

    GsCurDrawEnvW = drawenv->w;
    GsCurDrawEnvH = drawenv->h;
}

void GsSetDispEnv(const GsDispEnv *dispenv)
{
	gpu_ctrl(5, (dispenv->y<<10)|dispenv->x); // Display offset
}

void gpu_ctrl(unsigned int command, unsigned int param)
{
	unsigned int doubleword = (command << 0x18) | param;

	GPU_CONTROL_PORT = 0x01000000;
	GPU_CONTROL_PORT = doubleword;
}

void gpu_data(unsigned int data)
{
	GPU_DATA_PORT = data;
}

void gpu_data_ctrl(unsigned int command, unsigned int param)
{
	unsigned int doubleword = (command << 0x18) | param;

	GPU_CONTROL_PORT = 0x01000000;
	GPU_DATA_PORT = doubleword;
}

unsigned int setup_attribs(unsigned char tpage, unsigned int attribute, unsigned char *packet)
{
	unsigned int sprite_mode_packet;

	//printf("tpage = %d, attribute = %x, packet = %x\n", tpage, attribute, packet);
	//while(1);*/

/*
 * First, setup draw mode setting.
 */

	sprite_mode_packet = draw_mode_packet;
	sprite_mode_packet|= tpage & 0x1f; /* Texture page */
	sprite_mode_packet|= (attribute & 3) << 7; /* Color mode */
	sprite_mode_packet|= ((attribute>>2)&3) << 5; /* Translucency mode */

/*
 * Check for STP bit flag in attribute, and modify packet byte accordingly
 */
	if(attribute & 16)
		*packet|=2;

	//printf("sprite_mode_packet = %08x\n", sprite_mode_packet);

	return sprite_mode_packet;
}

unsigned int GsListPos()
{
	return linked_list_pos;
}

void GsEnableDisplay(int enable)
{
	gpu_ctrl(3, enable ? 0 : 1);
}

void GsReset()
{
	gpu_ctrl(0, 0); // Reset GPU
}

void GsInitEx(unsigned int flags)
{
	//gpu_ctrl(0, 0); // Reset GPU
	GsReset(); // Reset GPU

	DPCR |= (1<<0xb); // Enable dma channel 2
	gpu_ctrl(4, 2); // DMA CPU->GPU mode

	//gpu_ctrl(3, 1); // Disable display
	GsEnableDisplay(0); // Disable display

	GPU_DATA_PORT = 0x01000000; // Reset data port

	/*gpu_ctrl(6, 0xc40240); // Horizontal start end
	gpu_ctrl(7, 0x049025); // Vertical start end*/
	//DrawFBRect(0, 0, 1023, 511, 0, 0, 0);
}

void GsInit()
{
	GsInitEx(0);
}

/*void SetVBlankHandler2(void *(callback)())
{
	unsigned int eventid;

	EnterCriticalSection();

	IMASK|=8; // Enable VBLANK interrupt
	eventid = openevent(0xf0000001, 2, 0x1000, vblank_handler);

	if(eventid == -1)
	{
		printf("SetVBlankHandler: Failed to open event!\n");
		return;
	}
	else
		printf("SetVBlankHandler: Event opened successfully!\n");

	if(enableevent(eventid) == 0)
	{
		printf("SetVBlankHandler: Failed to enable event!\n");
		// Shouldn't we close the event as well?
		return;
	}
	else
		printf("SetVBlankHandler: Event enabled successfully!\n");

	ExitCriticalSection();
}*/

int GsSetVideoMode(int width, int height, int video_mode)
{
	// Just a quick wrapper for GsSetVideoModeEx
	return GsSetVideoModeEx(width, height, video_mode, 0, 0, 0);
}

int GsSetVideoModeEx(int width, int height, int video_mode, int rgb24,
	int inter, int reverse)
{
	unsigned char mode = 0;

	GsEnableDisplay(0);

	if(video_mode == VMODE_NTSC)
	{
		gpu_ctrl(6, 0xC4E24E); // Horizontal screen range
		gpu_ctrl(7, 0x040010); // Vertical screen range
	}
	else
	{
		gpu_ctrl(6, 0xC62262); // Horizontal screen range
		gpu_ctrl(7, 0x04B42D); // Vertical screen range
	}

	switch(height)
	{
		case 240:
		break;
		case 480:
			mode|=4;
		break;
		default:
			printf("%s: error, unknown height %d!\n", __FUNCTION__, height);
			return 0;
	}

	switch(width)
	{
		case 256:
		break;
		case 320:
			mode|=1;
		break;
		case 512:
			mode|=2;
		break;
		case 640:
			mode|=3;
		break;
		case 368:
			mode|=64;
		break;
		default:
			printf("%s: error, unknown width %d!\n", __FUNCTION__, width);
			return 0;
	}

	if(video_mode)mode|=8; // Set PAL
	if(rgb24)mode|=16; // Set unaccellerated 24-bit mode
	if(inter)mode|=32; // Set interlaced video mode
	if(reverse)mode|=128; // Set reverse flag (?)

	gpu_ctrl(8, mode);
	GsEnableDisplay(1);

	GsScreenW = width;
	GsScreenH = height;
	GsScreenM = video_mode;

	return 1;
}

void DrawFBRect(int x, int y, int w, int h, int r, int g, int b)
{
	while(!(GPU_CONTROL_PORT & (1<<0x1c)));

	// Disable DMA
	GPU_CONTROL_PORT = 0x04000000;

	GPU_DATA_PORT = 0x01000000; // Reset data port
	GPU_DATA_PORT = 0xE6000000; // Disable masking stuff
	gpu_data_ctrl(2, ((b&0xff)<<16)|((g&0xff)<<8)|r);
	GPU_DATA_PORT = (y<<16)|x;
	GPU_DATA_PORT = (h<<16)|w;
}

void GsClearMem()
{
	// "Clears" the entire video memory by using DrawFBRect
	// and waits that it has finished drawing...

	DrawFBRect(0,0,1023,511,0,0,0);
	while(GsIsDrawing());
	DrawFBRect(0,511,1023,1,0,0,0);
	while(GsIsDrawing());
	DrawFBRect(1023,511,1,1,0,0,0);
	while(GsIsDrawing());
}

int GsImageFromTim(GsImage *image, const void *timdata)
{
	const unsigned int *timdata_i = (unsigned int*)timdata;
	const unsigned short *timdata_s = (unsigned short*)timdata;
	unsigned int pdata_pos;
	unsigned int pdata_pos_s;

	//printf("timdata_i[0] = %08x\n", timdata_i[0]);

	if(timdata_i[0] != 0x10)
	{
		//printf("timdata_i[0] = %08x\n", timdata_i[0]);
		return 0; // Unknown version or ID
	}

	image->pmode = timdata_i[1] & 7;

	//printf("image->pmode = %d\n", image->pmode);

	image->has_clut = (timdata_i[1] & 8) ? 1 : 0;

	if(!image->has_clut)
		pdata_pos = 8;
	else
	{
		pdata_pos = 8 + timdata_i[2];
		image->clut_x = timdata_s[6];
		image->clut_y = timdata_s[7];
		image->clut_w = timdata_s[8];
		image->clut_h = timdata_s[9];
		image->clut_data = &timdata_s[10];

		/*printf("image->clut_y = %d\n", image->clut_y);
		printf("image->clut_x = %d\n", image->clut_x);
		printf("image->clut_h = %d\n", image->clut_h);
		printf("image->clut_w = %d\n", image->clut_w);*/
	}

	pdata_pos_s = pdata_pos / 2;

	image->x = timdata_s[pdata_pos_s + 2];
	image->y = timdata_s[pdata_pos_s + 3];
	image->w = timdata_s[pdata_pos_s + 4];
	image->h = timdata_s[pdata_pos_s + 5];
	image->data = &timdata_s[pdata_pos_s + 6];

	/*printf("image->y = %d\n", image->y);
	printf("image->x = %d\n", image->x);
	printf("image->h = %d\n", image->h);
	printf("image->w = %d\n", image->w);*/

	return 1;
}

void GsUploadImage(const GsImage *image)
{
	if(image->has_clut)
		LoadImage(image->clut_data, image->clut_x, image->clut_y,
			image->clut_w, image->clut_h);

	LoadImage(image->data, image->x, image->y, image->w, image->h);
}

int GsSpriteFromImage(GsSprite *sprite, const GsImage *image, int do_upload)
{
	if(do_upload)
		GsUploadImage(image);

	bzero(sprite, sizeof(GsSprite));

	sprite->tpage = (image->x / 64) + ((image->y/256)*16);
	sprite->u = image->x & 0x3f;
	sprite->v = image->y & 0xff;

	sprite->cx = image->clut_x;
	sprite->cy = image->clut_y;

	if(image->pmode == 0) // 4-bit pixel mode
		sprite->u*=4;
	else if(image->pmode == 1) // 8-bit pixel mode
		sprite->u*=2;

	switch(image->pmode)
	{
		case 0:
			sprite->w = image->w * 4;
		break;
		case 1:
			sprite->w = image->w * 2;
		break;
		case 2:
			sprite->w = image->w;
		break;
		case 3:
			sprite->w = image->w + (image->w / 2);
		break;
	}

	sprite->h = image->h;
	sprite->attribute = COLORMODE(image->pmode);
	sprite->r = sprite->g = sprite->b = NORMAL_LUMINANCE;

	return 1;
}

void GsSetMasking(unsigned char flag)
{
	gpu_data_ctrl(0xe6, flag);
}

int GsIsDrawing()
{
	/*int x;

	if(PSX_GetInitFlags() & PSX_INIT_NOBIOS)
	{
		int r = (!(GPU_CONTROL_PORT & (1<<0x1a))) || (!__psxsdk_gpu_dma_finished);

		for(x = 0; x < 1000; x++);

		return r;
	}*/

	return !(GPU_CONTROL_PORT & (1<<0x1a)) ;
}



// Functions which use default values to use when you do not
// really need to fiddle with all the fields of the structure

void GsSetDrawEnvSimple(int x, int y, int w, int h)
{
	GsDrawEnv env;

	env.dither = 0;
	env.draw_on_display = 1;
	env.x = x;
	env.y = y;
	env.w = w;
	env.h = h;
	env.ignore_mask = 0;
	env.set_mask = 0;

	GsSetDrawEnv(&env);
}

void GsSetDispEnvSimple(int x, int y)
{
	GsDispEnv env;

	env.x = x;
	env.y = y;

	GsSetDispEnv(&env);
}

// Built-in font functions.

void GsLoadFont(int fb_x, int fb_y, int cx, int cy)
{
	const unsigned short pal[16] = {0x0, 0x7fff};

	LoadImage(psxsdk_font_data, fb_x, fb_y, 16, 128);
	while(GsIsDrawing());

	if(cx != -1 && cy != -1)
	{
		LoadImage(pal, cx, cy, 16, 1);

		fb_font_cx = cx;
		fb_font_cy = cy;

		while(GsIsDrawing());
	}

	fb_font_x = fb_x;
	fb_font_y = fb_y;
}

unsigned int GsPrintFont_Draw(int x, int y, int scalex, int scaley)
{
	//int r;
	GsSprite spr;
	char *string;
	int fw, fh;

	/*va_list ap;

	va_start(ap, fmt);*/

//	r = vsnprintf(gpu_stringbuf, 512, fmt, ap);

//	va_end(ap);
	fw = gs_calculate_scaled_size(8, scalex);//(8*scalex)/4096;
	fh = gs_calculate_scaled_size(8, scaley);//(8*scaley)/4096;

	spr.x = x;
	spr.y = y;
	spr.r = prfont_rl;
	spr.g = prfont_gl;
	spr.b = prfont_bl;
	spr.attribute = 0;
	spr.cx = fb_font_cx;
	spr.cy = fb_font_cy;
	spr.tpage = (fb_font_x / 64) + ((fb_font_y / 256)*16);
	spr.w = 8;
	spr.h = 8;
	spr.scalex = scalex;
	spr.scaley = scaley;

	string = gpu_stringbuf;

	while(*string)
	{
		if(prfont_flags & PRFONT_WRAP)
		{
			if(spr.x >= GsScreenW)
			{
				spr.x = spr.x - GsScreenW;
				spr.y += fh;
			}
		}

		if(*string >= ' ' && *string <= '~')
		{
			spr.u = ((fb_font_x & 0x3f)*4)+((*string & 7) << 3);
			spr.v = (fb_font_y & 0xff)+(*string & 0xf8);

			if((spr.x < GsCurDrawEnvW && (spr.x+fw)>=0) &&
			   (spr.y < GsCurDrawEnvH && (spr.y+fh)>=0))
			{

				if((scalex == 0 || scalex == 1) && (scaley == 0 || scaley == 1))
					GsSortSimpleSprite(&spr);
				else
					GsSortSprite(&spr);
			}

			spr.x += fw;
		}

		if(*string == '\r')
			spr.x = 0;

		if(*string == '\n')
		{
			spr.x = (prfont_flags & PRFONT_UNIXLF)? 0 : x;
			spr.y += fh;
		}

		if(*string == '\t')
			spr.x += fw * 8;

		string++;
	}

	return (spr.y << 16) | spr.x;
}

unsigned int GsVPrintFont(int x, int y, const char *fmt, va_list ap)
{
	int r;
	//GsSprite spr;
	//char *string;
	int fw = gs_calculate_scaled_size(8, prfont_scale_x);

	r = vsnprintf(gpu_stringbuf, 512, fmt, ap);

	if(prfont_flags & PRFONT_WRAP)
		r = GsPrintFont_Draw(x, y, prfont_scale_x, prfont_scale_y);
	else if(prfont_flags & PRFONT_CENTER)
		r = GsPrintFont_Draw(x - ((r * fw)/2), y, prfont_scale_x, prfont_scale_y);
	else if(prfont_flags & PRFONT_RIGHT)
		r = GsPrintFont_Draw(x - (r * fw), y, prfont_scale_x, prfont_scale_y);
	else
		r = GsPrintFont_Draw(x, y, prfont_scale_x, prfont_scale_y);

	return r;
}

unsigned int GsPrintFont(int x, int y, const char *fmt, ...)
{
	int r;

	va_list ap;

	va_start(ap, fmt);

	r = GsVPrintFont(x, y, fmt, ap);

	va_end(ap);

	return r;
}

void GsSetFont(int fb_x, int fb_y, int cx, int cy)
{
	if(fb_x != -1)
		fb_font_x = fb_x;

	if(fb_y != -1)
		fb_font_y = fb_y;

	if(fb_font_cx != -1)
		fb_font_cx = cx;

	if(fb_font_cy != -1)
		fb_font_cy = cy;
}

void GsSetFontAttrib(unsigned int flags)
{
	prfont_flags = flags;

	if(prfont_flags == 0)
	{
		PRFONT_SCALEX(0);
		PRFONT_SCALEY(0);

		PRFONT_RL(NORMAL_LUMINANCE);
		PRFONT_GL(NORMAL_LUMINANCE);
		PRFONT_BL(NORMAL_LUMINANCE);
	}
}

static double gs_internal_cos(int a)
{
	int a_a = (a>>12)-(((a>>12)/360)*360);

	if(a_a>=0 && a_a<=90)
		return gs_rot_cos_tbl[a_a];
	else if(a_a>90 && a_a<=180)
		return -gs_rot_cos_tbl[180 - a_a];
	else if(a_a>180 && a_a<=270)
		return -gs_rot_cos_tbl[a_a - 180];
	else if(a_a>270 && a_a<=359)
		return gs_rot_cos_tbl[360 - a_a];

	return 0;
}

static double gs_internal_sin(int a)
{
	int a_a = (a>>12)-(((a>>12)/360)*360);

	if(a_a>=0 && a_a<=90)
		return gs_rot_cos_tbl[90-a_a];
	else if(a_a>90 && a_a<=180)
		return gs_rot_cos_tbl[a_a-90];
	else if(a_a>180 && a_a<=270)
		return -gs_rot_cos_tbl[270-a_a];
	else if(a_a>270 && a_a<=359)
		return -gs_rot_cos_tbl[a_a-270];

	return 0;
}

static void gs_internal_vector_rotate(int x_a, int y_a, int z_a, double *v, double *n)
{
	double axis_m[3][3];
	double b[3];
	double k[3], s[3];
	int x;

	k[0] = gs_internal_cos(x_a);
	k[1] = gs_internal_cos(y_a);
	k[2] = gs_internal_cos(z_a);

	s[0] = gs_internal_sin(x_a);
	s[1] = gs_internal_sin(y_a);
	s[2] = gs_internal_sin(z_a);

	axis_m[0][0] = k[1] * k[2];
	axis_m[0][1] = (k[0] * s[2]) + (s[0]*s[1]*k[2]);
	axis_m[0][2] = (s[0]*s[2]) - (k[0]*s[1]*k[2]);
	axis_m[1][0] = -(k[1] * s[2]);
	axis_m[1][1] = (k[0]*k[2]) - (s[0]*s[1]*s[2]);
	axis_m[1][2] = (s[0]*k[2]) + (k[0]*s[1]*s[2]);
	axis_m[2][0] = s[1];
	axis_m[2][1] = -(s[0]*k[1]);
	axis_m[2][2] = k[0]*k[1];

	for(x=0;x<3;x++)
		b[x] = (axis_m[x][0] * v[0]) + (axis_m[x][1] * v[1]) + (axis_m[x][2] * v[2]);

	b[1]=-b[1];

	for(x=0;x<3;x++)
		n[x]=b[x];
}

int GsIsWorking()
{
	return GsIsDrawing();
}

void GsSortCls(int r, int g, int b)
{
	GsRectangle rect;

	rect.r = r;
	rect.g = g;
	rect.b = b;
	rect.x = 0;
	rect.y = 0;
	rect.attribute = 0;
	rect.w = GsCurDrawEnvW;
	rect.h = GsCurDrawEnvH;

	GsSortRectangle(&rect);
}

void GsSetAutoWait()
{
	__gs_autowait = 1;
}

void GsRotateVector(int x_a, int y_a, int z_a, double *v, double *n)
{
	gs_internal_vector_rotate(x_a, y_a, z_a, v, n);
}

/*void GsSortSimpleMap(GsMap *map)
{
	unsigned int orig_pos = linked_list_pos;
	//unsigned int
	unsigned char pkt = 0x64;
	unsigned int md;
	unsigned char curCount = 0;
	unsigned int remaining;
	unsigned int tn;
	unsigned short tu;
	unsigned short tv;
	int x, y;

	md = setup_attribs(map->tpage, map->attribute, &pkt);

	linked_list[linked_list_pos++] = 0x01000000;
	linked_list[linked_list_pos++] = md;
	linked_list[orig_pos] |= ((unsigned int)&linked_list[linked_list_pos]) & 0xffffff;

	orig_pos = linked_list_pos;
	linked_list[linked_list_pos++] = 0x00000000;

	remaining = map->w * map->h;

	for(y = 0; y < map->h; y++)
	{
		for(x = 0; x < map->w; x++)
		{
			switch(map->tsize)
			{
				case 1:
					tn = ((unsigned char*)map->data)[(y * map->l) + x];
				break;
				case 2:
					tn = ((unsigned short*)map->data)[(y * map->l) + x];
				break;
				case 4:
					tn = ((unsigned int*)map->data)[(y * map->l) + x];
				break;
			}

			tn &= ~map->tmask;

			tu = (tn * map->tw) % map->tmw;
			tv = ((tn * map->tw) / map->tmw) * map->th;

			linked_list[linked_list_pos++] = (pkt<<24)|(map->b<<16)|(map->g<<8)|map->r;
			linked_list[linked_list_pos++] = (((map->y+(y*map->th))&0x7ff)<<16)|((map->x+(x*map->tw))&0x7ff);
			linked_list[linked_list_pos++] = (get_clutid(map->cx,map->cy)<<16)|((tv+map->v)<<8)|
				(tu+map->u);
			linked_list[linked_list_pos++] = (map->th<<16)|map->tw;

			curCount++;

			if(curCount == 252)
			{
				linked_list[orig_pos] = (252 << 24) | (((unsigned int)&linked_list[linked_list_pos]) & 0xffffff);
				orig_pos = linked_list_pos;

				remaining -= curCount;

				if(remaining > 0)
					linked_list_pos++;

				curCount = 0;
			}
		}
	}

	if(curCount > 0)
		linked_list[orig_pos] = (curCount << 24) | (((unsigned int)&linked_list[linked_list_pos]) & 0xffffff);
}*/

void GsSetListEx(unsigned int *listptr, unsigned int listpos)
{
	linked_list = listptr;
	linked_list_pos = listpos;
}

void GsSortPolyLine(const GsPolyLine *line)
{
	// PKT 0x48

	int orig_pos = linked_list_pos;
	int x;
	unsigned char pkt = 0x48;
	unsigned int md;

	md = setup_attribs(0, line->attribute, &pkt);

	linked_list_pos++; // skip this word, we will replace it later
	linked_list[linked_list_pos++] = md;
	linked_list[linked_list_pos++] = (pkt<<24)|(line->b<<16)|(line->g<<8)|(line->r);

	for(x = 0; x < line->npoints; x++)
		linked_list[linked_list_pos++] = ((line->y[x]&0x7ff)<<16)|(line->x[x]&0x7ff);

	linked_list[linked_list_pos++] = 0x55555555; // termination code

	linked_list[orig_pos] = ((line->npoints+3) << 24) | (((unsigned int)&linked_list[linked_list_pos]) & 0xffffff);
}

void GsSortGPolyLine(const GsGPolyLine *line)
{
	// PKT 0x58

	int orig_pos = linked_list_pos;
	int x;
	unsigned char pkt = 0x58;
	unsigned int md;

	md = setup_attribs(0, line->attribute, &pkt);

	linked_list_pos++; // skip this word, we will replace it later
	linked_list[linked_list_pos++] = md;

	for(x=0; x < line->npoints;x++)
	{
		linked_list[linked_list_pos++] = (line->b[x]<<16)|(line->g[x]<<8)|(line->r[x])|((x == 0)?(pkt<<24):0);
		linked_list[linked_list_pos++] = ((line->y[x]&0x7ff)<<16)|(line->x[x] & 0x7ff);
	}

	linked_list[linked_list_pos++] = 0x55555555; // termination code

	linked_list[orig_pos] = (((line->npoints*2)+2) << 24) | (((unsigned int)&linked_list[linked_list_pos]) & 0xffffff);
}

void GsSortGTPoly4(const GsGTPoly4 *tpoly4)
{
	unsigned int orig_pos = linked_list_pos;
	unsigned char pkt = 0x3c;
	unsigned int md;

	/*md = setup_attribs(tpoly4->tpage, tpoly4->attribute, &pkt);*/

	//printf("tpoly4->tpage = %d\n", tpoly4->tpage);

	md = setup_attribs(tpoly4->tpage, tpoly4->attribute, &pkt);

	//printf("pkt = %x\n", pkt);

	linked_list[linked_list_pos++] = 0x0C000000;
	//linked_list[linked_list_pos++] = md;
	//linked_list[linked_list_pos++] = 0xe0000000;
	//linked_list[linked_list_pos++] = 0xe1000105;

	//printf("tpoly4 md: %08x\n", md);
	linked_list[linked_list_pos++] = (pkt<<24)|(tpoly4->b[0]<<16)|(tpoly4->g[0]<<8)|(tpoly4->r[0]);
	linked_list[linked_list_pos++] = ((tpoly4->y[0]&0x7ff)<<16)|(tpoly4->x[0]&0x7ff);
	linked_list[linked_list_pos++] = (get_clutid(tpoly4->cx, tpoly4->cy)<<16)|(tpoly4->v[0]<<8)|tpoly4->u[0];
	linked_list[linked_list_pos++] = (tpoly4->b[1]<<16)|(tpoly4->g[1]<<8)|tpoly4->r[1];
	linked_list[linked_list_pos++] = ((tpoly4->y[1]&0x7ff)<<16)|(tpoly4->x[1]&0x7ff);
	linked_list[linked_list_pos++] = (md << 16)|(tpoly4->v[1]<<8)|tpoly4->u[1];
	linked_list[linked_list_pos++] = (tpoly4->b[1]<<16)|(tpoly4->g[1]<<8)|tpoly4->r[1];
	linked_list[linked_list_pos++] = ((tpoly4->y[2]&0x7ff)<<16)|(tpoly4->x[2]&0x7ff);
	linked_list[linked_list_pos++] = (tpoly4->v[2]<<8)|tpoly4->u[2];
	linked_list[linked_list_pos++] = (tpoly4->b[2]<<16)|(tpoly4->g[2]<<8)|tpoly4->r[2];
	linked_list[linked_list_pos++] = ((tpoly4->y[3]&0x7ff)<<16)|(tpoly4->x[3]&0x7ff);
	linked_list[linked_list_pos++] = (tpoly4->v[3]<<8)|tpoly4->u[3];

	linked_list[orig_pos] |= ((unsigned int)&linked_list[linked_list_pos]) & 0xffffff;
}

void GsSortGTPoly3(const GsGTPoly3 *tpoly3)
{
	int orig_pos = linked_list_pos;
	int x;
	unsigned char pkt = 0x34;
	unsigned int md;

	md = setup_attribs(tpoly3->tpage, tpoly3->attribute, &pkt);

	linked_list[linked_list_pos++] = 0x09000000;

	for(x = 0; x < 3; x++)
	{
		linked_list[linked_list_pos++] =
			((x==0)?(pkt<<24):0)|(tpoly3->b[x]<<16)|(tpoly3->g[x]<<8)|(tpoly3->r[x]);
		linked_list[linked_list_pos++] = ((tpoly3->y[x]&0x7ff)<<16)|(tpoly3->x[x]&0x7ff);
		linked_list[linked_list_pos] = (tpoly3->u[x]<<8)|tpoly3->v[x];

		switch(x)
		{
			case 0:
				linked_list[linked_list_pos++] |=
					get_clutid(tpoly3->cx, tpoly3->cy) << 16;
			break;
			case 1:
				linked_list[linked_list_pos++] |=
					md << 16;
			break;
			default:
				linked_list_pos++;
		}
	}

	linked_list[orig_pos] |= ((unsigned int)&linked_list[linked_list_pos]) & 0xffffff;
}