path: root/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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permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice (including the
next paragraph) shall be included in all copies or substantial portions
of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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



/* $XFree86$ */

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

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

#include "kdrive.h"
#include "kxv.h"
#include "i810.h"
#include "cursorstr.h"

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


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

void
_i810MoveCursor(ScreenPtr pScreen, int x, int y) {
    SetupCursor(pScreen);
    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)
{
    SetupCursor (pScreen);
    
    if (!pCurPriv->has_cursor)
	return;
    
    if (!pScreenPriv->enabled)
	return;
    
    _i810MoveCursor (pScreen, x, y);

    i810LoadCursor(pScreen, x, y);
}

static void
_i810SetCursorColors(ScreenPtr pScreen) { /* int bg, int fg */

    SetupCursor(pScreen);
    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		    w, h;
    unsigned short  r;
    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, b1, b2;

	    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) {

    SetupCursor(pScreen);

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


static Bool
i810RealizeCursor (ScreenPtr pScreen, CursorPtr pCursor)
{
    SetupCursor(pScreen);

    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)
{
    SetupCursor(pScreen);

    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)
{
    SetupCursor (pScreen);

    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)
{

    SetupCursor(pScreen);

    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)
{
    SetupCursor (pScreen);

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

void
i810CursorDisable (ScreenPtr pScreen)
{
    SetupCursor (pScreen);

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

void
i810CursorFini (ScreenPtr pScreen)
{
    SetupCursor (pScreen);

    pCurPriv->pCursor = NULL;
}