path: root/src/nsc_gx1_cursor.c

/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/nsc/nsc_gx1_cursor.c,v 1.5tsi Exp $ */
/*
 * $Workfile: nsc_gx1_cursor.c $
 * $Revision$
 * $Author$
 *
 * File Contents: Xfree cursor implementation routines
 *                for geode HWcursor init.setting cursor color,image etc
 *                are done here.
 * Project:       Geode Xfree Frame buffer device driver.
 *
 */

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/* NSC_LIC_GPL
 *
 * National Semiconductor Corporation Gnu General Public License for 
 *
 * National Xfree frame buffer driver
 *
 * (GPL License with Export Notice)
 *
 * Copyright (c) 1999-2001
 * National Semiconductor Corporation.
 * All rights reserved.
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 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
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 * EXPORT LAWS: THIS LICENSE ADDS NO RESTRICTIONS TO THE EXPORT LAWS OF 
 * YOUR JURISDICTION. It is licensee's responsibility to comply with 
 * any export regulations applicable in licensee's jurisdiction. Under 
 * CURRENT (2001) U.S. export regulations this software 
 * is eligible for export from the U.S. and can be downloaded by or 
 * otherwise exported or reexported worldwide EXCEPT to U.S. embargoed 
 * destinations which include Cuba, Iraq, Libya, North Korea, Iran, 
 * Syria, Sudan, Afghanistan and any other country to which the U.S. 
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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "xf86.h"
#include "xf86_OSproc.h"
#include "xf86Pci.h"
#include "xf86PciInfo.h"
#include "nsc.h"

/* Forward declarations of the functions */
Bool GX1HWCursorInit(ScreenPtr pScreen);
static void GX1SetCursorColors(ScrnInfoPtr pScreenInfo, int bg, int fg);
static void GX1SetCursorPosition(ScrnInfoPtr pScreenInfo, int x, int y);
void GX1LoadCursorImage(ScrnInfoPtr pScreenInfo, unsigned char *src);
void GX1HideCursor(ScrnInfoPtr pScreenInfo);
void GX1ShowCursor(ScrnInfoPtr pScreenInfo);
static Bool GX1UseHWCursor(ScreenPtr pScreen, CursorPtr pCurs);
extern void GX1SetVideoPosition(int x, int y, int width, int height,
                                short src_w, short src_h, short drw_w,
                                short drw_h, int id, int offset,
                                ScrnInfoPtr pScrn);
/*----------------------------------------------------------------------------
 * GX1HWCursorInit.
 *
 * Description	:This function sets the cursor information by probing the
 * 																hardware.
 *
 * Parameters.
 *     pScreen	:Screeen pointer structure.
 *
 * Returns		:TRUE on success and FALSE on Failure
 *
 * Comments		:Geode supports the hardware_cursor,no need to enable SW
 *                    cursor.
*----------------------------------------------------------------------------
*/
Bool
GX1HWCursorInit(ScreenPtr pScreen)
{
    ScrnInfoPtr pScreenInfo = xf86Screens[pScreen->myNum];
    GeodePtr pGeode = GEODEPTR(pScreenInfo);
    xf86CursorInfoPtr infoPtr;

    infoPtr = xf86CreateCursorInfoRec();
    if (!infoPtr)
        return FALSE;
    /* the geode structure is intiallized with the cursor infoRec */
    pGeode->CursorInfo = infoPtr;
    infoPtr->MaxWidth = 32;
    infoPtr->MaxHeight = 32;
    /* seeting up the cursor flags */
    infoPtr->Flags = HARDWARE_CURSOR_BIT_ORDER_MSBFIRST |
        HARDWARE_CURSOR_TRUECOLOR_AT_8BPP |
        HARDWARE_CURSOR_SOURCE_MASK_NOT_INTERLEAVED;
    /* cursor info ptr is intiallized with the values obtained from
     * * durnago calls
     */
    infoPtr->SetCursorColors = GX1SetCursorColors;
    infoPtr->SetCursorPosition = GX1SetCursorPosition;
    infoPtr->LoadCursorImage = GX1LoadCursorImage;
    infoPtr->HideCursor = GX1HideCursor;
    infoPtr->ShowCursor = GX1ShowCursor;
    infoPtr->UseHWCursor = GX1UseHWCursor;
    return (xf86InitCursor(pScreen, infoPtr));
}

/*----------------------------------------------------------------------------
 * GX1SetCursorColors.
 *
 * Description	:This function sets the cursor foreground and background
 *                    colors
 * Parameters:
 *    pScreen:	Screeen pointer structure.
 *    	   bg:	Specifies the color value of cursor background color.
 *    	   fg:	Specifies the color value of cursor foreground color.
 *    Returns:	none.
 *
 *   Comments:	The integer color value passed by this function is
 *              converted into  * RGB  value by the gfx_set_color routines.
 *----------------------------------------------------------------------------
 */
static void
GX1SetCursorColors(ScrnInfoPtr pScreenInfo, int bg, int fg)
{
    GFX(set_cursor_colors(bg, fg));
}

/*----------------------------------------------------------------------------
 * GX1SetCursorPosition.
 *
 * Description	:This function sets the cursor co -ordinates and enable the
 *               cursor.
 *
 * Parameters:
 *    pScreen: Screeen pointer structure.
 *    	    x: Specifies the x-cordinates of the cursor.
 *    	    y: Specifies the y co-ordinate of the cursor.
 *    Returns: none.
 *
 *----------------------------------------------------------------------------
 */
static void
GX1SetCursorPosition(ScrnInfoPtr pScreenInfo, int x, int y)
{
    unsigned long offset;
    static int panOffset = 0;
    GeodePtr pGeode = GEODEPTR(pScreenInfo);

    unsigned short xhot = 0, yhot = 0;

    if (x < 0) {
        xhot = (unsigned short) (-x);
        x = 0;
    }
    if (y < 0) {
        yhot = (unsigned short) (-y);
        y = 0;
    }

    if (pGeode->TV_Overscan_On) {
        x += pGeode->TVOx;
        y += pGeode->TVOy;
    }
    GFX(set_cursor_position(pGeode->CursorStartOffset, x, y, xhot, yhot));
    GFX(set_cursor_enable(1));

    if ((pGeode->OverlayON) && (pGeode->Panel)) {
#if defined(STB_X)
        Gal_get_display_offset(&offset);
#else
        offset = gfx_get_display_offset();
#endif
        if (offset != panOffset) {
            GX1SetVideoPosition(pGeode->video_x, pGeode->video_y,
                                pGeode->video_w, pGeode->video_h,
                                pGeode->video_srcw, pGeode->video_srch,
                                pGeode->video_dstw, pGeode->video_dsth,
                                pGeode->video_id, pGeode->video_offset,
                                pGeode->video_scrnptr);
            panOffset = offset;
        }
    }
}

/*----------------------------------------------------------------------------
 * GX1LoadCursorImage
 *
 * Description	:This function loads the 32x32 cursor pattern.The shape
 *               and color is set by AND and XOR masking of arrays of 32
 *               DWORD.
 * Parameters:
 *    pScreen: Screeen pointer structure.
 *    src    : Specifies cursor data.
 * Returns   : none
 *
 *----------------------------------------------------------------------------
*/
void
GX1LoadCursorImage(ScrnInfoPtr pScreenInfo, unsigned char *src)
{
    int i;
    unsigned long shape;
    unsigned long mask;
    unsigned long andMask[32] = { 0, };
    unsigned long xorMask[32] = { 0, };
    GeodePtr pGeode = GEODEPTR(pScreenInfo);

    for (i = 0; i < 32; i++) {
        if (src) {
            shape = ((unsigned long) src[i * 4] << 24) |
                ((unsigned long) src[i * 4 + 1] << 16) |
                ((unsigned long) src[i * 4 + 2] << 8) |
                ((unsigned long) src[i * 4 + 3] << 0);
            mask = ((unsigned long) src[i * 4 + 128] << 24) |
                ((unsigned long) src[i * 4 + 1 + 128] << 16) |
                ((unsigned long) src[i * 4 + 2 + 128] << 8) |
                ((unsigned long) src[i * 4 + 3 + 128] << 0);
        }
        else {
            mask = 0x0;
            shape = 0xFFFFFFFF;
        }

        andMask[i] = ~(mask);
        xorMask[i] = shape & mask;
    }

    GFX(set_cursor_shape32(pGeode->CursorStartOffset, andMask, xorMask));
}

/*----------------------------------------------------------------------------
 * GX1HideCursor.
 *
 * Description	:This function will disable the cursor.
 *
 * Parameters:
 *    pScreen: Handles to the Screeen pointer structure.
 *
 *    Returns: none.
 *
 *   Comments:	gfx_set_cursor enable function is hardcoded to disable
 *		the cursor.
 *----------------------------------------------------------------------------
 */
void
GX1HideCursor(ScrnInfoPtr pScreenInfo)
{
    GFX(set_cursor_enable(0));
}

/*----------------------------------------------------------------------------
 * GX1ShowCursor
 *
 * Description	:This function will enable  the cursor.
 *
 * Parameters:
 *	pScreen		:Handles to the Screeen pointer structure.
 *
 * Returns      :none
 *
 * Comments		:gfx_set_cursor enable function is hardcoded to enable the
 * 											cursor
 *----------------------------------------------------------------------------
*/
void
GX1ShowCursor(ScrnInfoPtr pScreenInfo)
{
    GFX(set_cursor_enable(1));
}

/*----------------------------------------------------------------------------
 * GX1UseHwCursor.
 *
 * Description	:This function will sets the hardware cursor flag in
 *                 pscreen  structure.
 *
 * Parameters.
 *	pScreen		:Handles to the Screeen pointer structure.
 *
 * Returns		:none
 *
 * Comments		:none
 *
 *----------------------------------------------------------------------------
*/
static Bool
GX1UseHWCursor(ScreenPtr pScreen, CursorPtr pCurs)
{
    ScrnInfoPtr pScreenInfo = XF86SCRNINFO(pScreen);

    if (pScreenInfo->currentMode->Flags & V_DBLSCAN)
        return FALSE;
    return TRUE;
}

/* End of File */