/*
        Copyright 1999, Be Incorporated.   All Rights Reserved.
        This file may be used under the terms of the Be Sample Code License.

        Other authors:
        Mark Watson,
        Rudolf Cornelissen 4/2003-11/2004
*/

#define MODULE_BIT 0x20000000

/*DUALHEAD notes - 
        No hardware cursor possible on the secondary head :( 
                Reasons:
                CRTC1 has a cursor, can be displayed on DAC or MAVEN
                CRTC2 has no cursor
                Can not switch CRTC in one vblank (has to resync)
                CRTC2 does not support split screen
                app_server does not support some modes with and some without cursor
        virtual not supported, because of MAVEN blanking issues
*/

#include "acc_std.h"

status_t SET_CURSOR_SHAPE(uint16 width, uint16 height, uint16 hot_x, uint16 hot_y, uint8 *andMask, uint8 *xorMask) 
{
        LOG(4,("SET_CURSOR_SHAPE: width %d, height %d\n", width, height));
        if ((width != 16) || (height != 16))
        {
                return B_ERROR;
        }
        else if ((hot_x >= width) || (hot_y >= height))
        {
                return B_ERROR;
        }
        else
        {
                gx00_crtc_cursor_define(andMask,xorMask);

                /* Update cursor variables appropriately. */
                si->cursor.width = width;
                si->cursor.height = height;
                si->cursor.hot_x = hot_x;
                si->cursor.hot_y = hot_y;
        }

        return B_OK;
}

/* Move the cursor to the specified position on the desktop, taking account of virtual/dual issues */
void MOVE_CURSOR(uint16 x, uint16 y) 
{
        uint16 hds = si->dm.h_display_start;    /* the current horizontal starting pixel */
        uint16 vds = si->dm.v_display_start;    /* the current vertical starting line */
        uint16 h_adjust;                     

        /* clamp cursor to display */
        if (x >= si->dm.virtual_width) x = si->dm.virtual_width - 1;
        if (y >= si->dm.virtual_height) y = si->dm.virtual_height - 1;

        /* store, for our info */
        si->cursor.x = x;
        si->cursor.y = y;

        /*set up minimum amount to scroll*/
        if (si->dm.flags & DUALHEAD_BITS)
        {
                switch(si->dm.space)
                {
                case B_RGB16_LITTLE:
                        h_adjust = 0x1f;
                        break;
                case B_RGB32_LITTLE:
                        h_adjust = 0x0f;
                        break;
                default:
                        h_adjust = 0x1f;
                        break;
                }
        }
        else
        {
                switch(si->dm.space)
                {
                case B_CMAP8:
                        h_adjust = 0x07;
                        break;
                case B_RGB15_LITTLE:case B_RGB16_LITTLE:
                        h_adjust = 0x03;
                        break;
                case B_RGB32_LITTLE:
                        h_adjust = 0x01;
                        break;
                default:
                        h_adjust = 0x07;
                        break;
                }
        }

        /* adjust h/v_display_start to move cursor onto screen */
        switch (si->dm.flags & DUALHEAD_BITS)
        {
        case DUALHEAD_ON:
        case DUALHEAD_SWITCH:
                if (x >= ((si->dm.timing.h_display * 2) + hds))
                {
                        hds = ((x - (si->dm.timing.h_display * 2)) + 1 + h_adjust) & ~h_adjust;
                        /* make sure we stay within the display! */
                        if ((hds + (si->dm.timing.h_display * 2)) > si->dm.virtual_width)
                                hds -= (h_adjust + 1);
                }
                else if (x < hds)
                        hds = x & ~h_adjust;
                break;
        default:
                if (x >= (si->dm.timing.h_display + hds))
                {
                        hds = ((x - si->dm.timing.h_display) + 1 + h_adjust) & ~h_adjust;
                        /* make sure we stay within the display! */
                        if ((hds + si->dm.timing.h_display) > si->dm.virtual_width)
                                hds -= (h_adjust + 1);
                }
                else if (x < hds)
                        hds = x & ~h_adjust;
                break;
        }

        if (y >= (si->dm.timing.v_display + vds))
                vds = y - si->dm.timing.v_display + 1;
        else if (y < vds)
                vds = y;

        /* reposition the desktop _and_ the overlay on the display if required */
        if ((hds!=si->dm.h_display_start) || (vds!=si->dm.v_display_start))
        {
                MOVE_DISPLAY(hds,vds);
                gx00_bes_move_overlay();
        }

        /* put cursor in correct physical position */
        x -= hds + si->cursor.hot_x;
        y -= vds + si->cursor.hot_y;

        /* account for switched CRTC's */
        if (si->switched_crtcs) x -= si->dm.timing.h_display;

        /* position the cursor on the display */
        gx00_crtc_cursor_position(x,y);
}

void SHOW_CURSOR(bool is_visible) 
{
        /* record for our info */
        si->cursor.is_visible = is_visible;

        if (is_visible)
                gx00_crtc_cursor_show();
        else
                gx00_crtc_cursor_hide();
}