xenocara/xserver/hw/kdrive/i810/i810_cursor.c

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/**************************************************************************

Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
All Rights Reserved.

Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
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**************************************************************************/

/* i810_cursor.c: KDrive hardware cursor routines for the i810 chipset */

/*
 * Authors:
 *   Keith Whitwell <keith@tungstengraphics.com>
 *   Pontus Lidman <pontus.lidman@nokia.com>
 *
 */

#ifdef HAVE_CONFIG_H
#include <kdrive-config.h>
#endif
#include "kdrive.h"
#include "kxv.h"
#include "i810.h"
#include "cursorstr.h"

#define SetupCursor(s)	    KdScreenPriv(pScreen); \
			    i810CardInfo(pScreenPriv); \
			    i810ScreenInfo(pScreenPriv); \
			    i810Cursor *pCurPriv = &i810s->cursor


static void
writeStandardMMIO(I810CardInfo *i810c, int addr, CARD8 val)
{
  moutb(addr, val);
}

static void
_i810MoveCursor(ScreenPtr pScreen, int x, int y)
{
    KdScreenPriv(pScreen);
    i810CardInfo(pScreenPriv);
    int flag;

    if (I810_DEBUG & DEBUG_VERBOSE_CURSOR)
      ErrorF( "I810SetCursorPosition %d %d\n", x, y);

    x += i810c->CursorOffset;

    if (x >= 0) flag = CURSOR_X_POS;
    else {
        flag = CURSOR_X_NEG;
        x=-x;
    }

    OUTREG8( CURSOR_X_LO, x&0xFF);
    OUTREG8( CURSOR_X_HI, (((x >> 8) & 0x07) | flag));
    
    if (y >= 0) flag = CURSOR_Y_POS;
    else {
        flag = CURSOR_Y_NEG;
        y=-y;
    }
    OUTREG8( CURSOR_Y_LO, y&0xFF);
    OUTREG8( CURSOR_Y_HI, (((y >> 8) & 0x07) | flag));

    /* Enable cursor */
    OUTREG( CURSOR_BASEADDR, i810c->CursorPhysical);
    OUTREG8( CURSOR_CONTROL, CURSOR_ORIGIN_DISPLAY | CURSOR_MODE_64_3C);

}

static void i810LoadCursor(ScreenPtr pScreen, int x, int y);

static void
i810MoveCursor (ScreenPtr pScreen, int x, int y)
{
    KdScreenPriv(pScreen);
    i810ScreenInfo(pScreenPriv);
    i810Cursor *pCurPriv = &i810s->cursor;
    
    if (!pCurPriv->has_cursor)
	return;
    
    if (!pScreenPriv->enabled)
	return;
    
    _i810MoveCursor (pScreen, x, y);

    i810LoadCursor(pScreen, x, y);
}

static void
_i810SetCursorColors(ScreenPtr pScreen)
{

    KdScreenPriv(pScreen);
    i810CardInfo(pScreenPriv);
    int tmp;

    int bg = 0xffffff;
    int fg = 0x000000;

    tmp=INREG8(PIXPIPE_CONFIG_0);
    tmp |= EXTENDED_PALETTE;
    OUTREG8( PIXPIPE_CONFIG_0, tmp);

    writeStandardMMIO(i810c, DACMASK, 0xFF);
    writeStandardMMIO(i810c, DACWX, 0x04);

    writeStandardMMIO(i810c, DACDATA, (bg & 0x00FF0000) >> 16);
    writeStandardMMIO(i810c, DACDATA, (bg & 0x0000FF00) >> 8);
    writeStandardMMIO(i810c, DACDATA, (bg & 0x000000FF));

    writeStandardMMIO(i810c, DACDATA, (fg & 0x00FF0000) >> 16);
    writeStandardMMIO(i810c, DACDATA, (fg & 0x0000FF00) >> 8);
    writeStandardMMIO(i810c, DACDATA, (fg & 0x000000FF));

    tmp=INREG8( PIXPIPE_CONFIG_0 );
    tmp &= ~EXTENDED_PALETTE;
    OUTREG8( PIXPIPE_CONFIG_0, tmp );
}

#define InvertBits32(v) { \
    v = ((v & 0x55555555) << 1) | ((v >> 1) & 0x55555555); \
    v = ((v & 0x33333333) << 2) | ((v >> 2) & 0x33333333); \
    v = ((v & 0x0f0f0f0f) << 4) | ((v >> 4) & 0x0f0f0f0f); \
}

static void i810LoadCursor(ScreenPtr pScreen, int x, int y)
{
    SetupCursor(pScreen);

    int		    h;
    unsigned int   *msk, *mskLine, *src, *srcLine;
    
    int		    i, j;
    int		    src_stride, src_width;

    CursorPtr	    pCursor = pCurPriv->pCursor;
    CursorBitsPtr   bits = pCursor->bits;
    CARD8 tmp;
    unsigned int *ram, *ramLine;

    pCurPriv->pCursor = pCursor;
    pCurPriv->xhot = pCursor->bits->xhot;
    pCurPriv->yhot = pCursor->bits->yhot;

    ramLine = (unsigned int *) (i810c->FbBase + i810c->CursorStart);
    mskLine = (unsigned int *) (bits->mask);
    srcLine = (unsigned int *) (bits->source);

    h = bits->height;
    if (h > I810_CURSOR_HEIGHT)
	h = I810_CURSOR_HEIGHT;

    src_stride = BitmapBytePad(bits->width);		/* bytes per line */
    src_stride = (src_stride +3) >> 2;
    src_width = (bits->width + 31) >> 5;

    for (i = 0; i < I810_CURSOR_HEIGHT; i++) {

	msk = mskLine;
	src = srcLine;
        ram = ramLine;
	mskLine += src_stride;
	srcLine += src_stride;
        ramLine += I810_CURSOR_WIDTH / 16;

	for (j = 0; j < I810_CURSOR_WIDTH / 32; j++) {

	    unsigned long  m, s;

	    if (i < h && j < src_width) 
	    {
		m = *msk++;
		s = *src++ & m;
		m = ~m;
		/* mask off right side */
		if (j == src_width - 1 && (bits->width & 31))
		{
		    m |= 0xffffffff << (bits->width & 31);
		}
	    }
	    else
	    {
		m = 0xffffffff;
		s = 0x00000000;
	    }

            InvertBits32(s);
            InvertBits32(m);

            ram[2+j]=s;
            ram[0+j]=m;
	}
    }
    /* Set new color */
    _i810SetCursorColors (pScreen);
     
    /* Move to new position */
    _i810MoveCursor (pScreen, x, y);
    
    /* Enable cursor */
    OUTREG( CURSOR_BASEADDR, i810c->CursorPhysical);
    OUTREG8( CURSOR_CONTROL, CURSOR_ORIGIN_DISPLAY | CURSOR_MODE_64_3C);
    
    tmp = INREG8( PIXPIPE_CONFIG_0 );
    tmp |= HW_CURSOR_ENABLE;
    OUTREG8( PIXPIPE_CONFIG_0, tmp);
}

static void
i810UnloadCursor(ScreenPtr pScreen)
{
    KdScreenPriv(pScreen);
    i810CardInfo(pScreenPriv);

    unsigned char tmp;
    
    tmp=INREG8( PIXPIPE_CONFIG_0 );
    tmp &= ~HW_CURSOR_ENABLE;
    OUTREG8( PIXPIPE_CONFIG_0, tmp);
}


static Bool
i810RealizeCursor (ScreenPtr pScreen, CursorPtr pCursor)
{
    KdScreenPriv(pScreen);
    i810ScreenInfo(pScreenPriv);
    i810Cursor *pCurPriv = &i810s->cursor;

    if (!pScreenPriv->enabled)
	return TRUE;
    
    /* miRecolorCursor does this */
    if (pCurPriv->pCursor == pCursor)
    {
	if (pCursor)
	{
	    int	    x, y;
	    
	    miPointerPosition (&x, &y);
	    i810LoadCursor (pScreen, x, y);
	}
    }
    return TRUE;
}

static Bool
i810UnrealizeCursor (ScreenPtr pScreen, CursorPtr pCursor)
{
    return TRUE;
}

static void
i810SetCursor (ScreenPtr pScreen, CursorPtr pCursor, int x, int y)
{
    KdScreenPriv(pScreen);
    i810ScreenInfo(pScreenPriv);
    i810Cursor *pCurPriv = &i810s->cursor;

    pCurPriv->pCursor = pCursor;
    
    if (!pScreenPriv->enabled)
	return;
    
    if (pCursor)
	i810LoadCursor (pScreen, x, y);
    else
	i810UnloadCursor (pScreen);
}

miPointerSpriteFuncRec i810PointerSpriteFuncs = {
    i810RealizeCursor,
    i810UnrealizeCursor,
    i810SetCursor,
    i810MoveCursor,
};

static void
i810QueryBestSize (int class, 
                   unsigned short *pwidth, unsigned short *pheight, 
                   ScreenPtr pScreen)
{
    KdScreenPriv(pScreen);
    i810ScreenInfo(pScreenPriv);
    i810Cursor *pCurPriv = &i810s->cursor;

    switch (class)
    {
    case CursorShape:
	if (*pwidth > pCurPriv->width)
	    *pwidth = pCurPriv->width;
	if (*pheight > pCurPriv->height)
	    *pheight = pCurPriv->height;
	if (*pwidth > pScreen->width)
	    *pwidth = pScreen->width;
	if (*pheight > pScreen->height)
	    *pheight = pScreen->height;
	break;
    default:
	fbQueryBestSize (class, pwidth, pheight, pScreen);
	break;
    }
}

Bool
i810CursorInit(ScreenPtr pScreen)
{
    KdScreenPriv(pScreen);
    i810ScreenInfo(pScreenPriv);
    i810CardInfo(pScreenPriv);
    i810Cursor *pCurPriv = &i810s->cursor;

    if (!i810c->CursorStart) {
	pCurPriv->has_cursor = FALSE;
	return FALSE;
    }

    pCurPriv->width = I810_CURSOR_WIDTH;
    pCurPriv->height= I810_CURSOR_HEIGHT;
    pScreen->QueryBestSize = i810QueryBestSize;
    miPointerInitialize (pScreen,
			 &i810PointerSpriteFuncs,
			 &kdPointerScreenFuncs,
			 FALSE);
    pCurPriv->has_cursor = TRUE;
    pCurPriv->pCursor = NULL;
    return TRUE;
}

void
i810CursorEnable (ScreenPtr pScreen)
{
    KdScreenPriv(pScreen);
    i810ScreenInfo(pScreenPriv);
    i810Cursor *pCurPriv = &i810s->cursor;

    if (pCurPriv->has_cursor)
    {
	if (pCurPriv->pCursor)
	{
	    int	    x, y;
	    
	    miPointerPosition (&x, &y);
	    i810LoadCursor (pScreen, x, y);
	}
	else
	    i810UnloadCursor (pScreen);
    }
}

void
i810CursorDisable (ScreenPtr pScreen)
{
    KdScreenPriv(pScreen);
    i810ScreenInfo(pScreenPriv);
    i810Cursor *pCurPriv = &i810s->cursor;

    if (!pScreenPriv->enabled)
	return;
    
    if (pCurPriv->has_cursor)
    {
	if (pCurPriv->pCursor)
	{
	    i810UnloadCursor (pScreen);
	}
    }
}

void
i810CursorFini (ScreenPtr pScreen)
{
    KdScreenPriv(pScreen);
    i810ScreenInfo(pScreenPriv);
    i810Cursor *pCurPriv = &i810s->cursor;

    pCurPriv->pCursor = NULL;
}