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

        Other authors:
        Gerald Zajac 2007-2008
*/

#include "accelerant.h"


status_t
SetCursorShape(uint16 width, uint16 height, uint16 hot_x, uint16 hot_y,
                                uint8* andMask, uint8* xorMask)
{
        // NOTE: Currently, for BeOS, cursor width and height must be equal to 16.

        if ((width != 16) || (height != 16)) {
                return B_ERROR;
        } else if ((hot_x >= width) || (hot_y >= height)) {
                return B_ERROR;
        } else {
                // Update cursor variables appropriately.

                SharedInfo& si = *gInfo.sharedInfo;
                si.cursorHotX = hot_x;
                si.cursorHotY = hot_y;

                if ( ! gInfo.LoadCursorImage(width, height, andMask, xorMask))
                        return B_ERROR;
        }

        return B_OK;
}


void
MoveCursor(uint16 xPos, uint16 yPos)
{
        // Move the cursor to the specified position on the desktop.  If we're
        // using some kind of virtual desktop, adjust the display start position
        // accordingly and position the cursor in the proper "virtual" location.

        int x = xPos;           // use signed int's since chip specific functions
        int y = yPos;           // need signed int to determine if cursor off screen

        SharedInfo& si = *gInfo.sharedInfo;
        DisplayModeEx& dm = si.displayMode;

        uint16 hds = dm.h_display_start;        // current horizontal starting pixel
        uint16 vds = dm.v_display_start;        // current vertical starting line

        // Clamp cursor to virtual display.
        if (x >= dm.virtual_width)
                x = dm.virtual_width - 1;
        if (y >= dm.virtual_height)
                y = dm.virtual_height - 1;

        // Adjust h/v display start to move cursor onto screen.
        if (x >= (dm.timing.h_display + hds))
                hds = x - dm.timing.h_display + 1;
        else if (x < hds)
                hds = x;

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

        // Reposition the desktop on the display if required.
        if (hds != dm.h_display_start || vds != dm.v_display_start)
                MoveDisplay(hds, vds);

        // Put cursor in correct physical position.
        x -= (hds + si.cursorHotX);
        y -= (vds + si.cursorHotY);

        // Position the cursor on the display.
        gInfo.SetCursorPosition(x, y);
}