/***************************************************************************
 * Copyright (c) 2024 Microsoft Corporation 
 * 
 * This program and the accompanying materials are made available under the
 * terms of the MIT License which is available at
 * https://opensource.org/licenses/MIT.
 * 
 * SPDX-License-Identifier: MIT
 **************************************************************************/


/**************************************************************************/
/**************************************************************************/
/**                                                                       */
/** GUIX Component                                                        */
/**                                                                       */
/**   Display Management (Display)                                        */
/**                                                                       */
/**************************************************************************/

#define GX_SOURCE_CODE


/* Include necessary system files.  */

#include "gx_api.h"
#include "gx_display.h"

/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _gx_display_driver_16bpp_rotated_pixel_write        PORTABLE C      */
/*                                                           6.1.3        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Kenneth Maxwell, Microsoft Corporation                              */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    Generic 16bpp color format pixel write function.                    */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    context                               Drawing context               */
/*    x                                     X coordinate                  */
/*    y                                     Y coordinate                  */
/*    color                                 Color of pixel to write       */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    None                                                                */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    None                                                                */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    GUIX Internal Code                                                  */
/*                                                                        */
/*  RELEASE HISTORY                                                       */
/*                                                                        */
/*    DATE              NAME                      DESCRIPTION             */
/*                                                                        */
/*  12-31-2020     Kenneth Maxwell          Initial Version 6.1.3         */
/*                                                                        */
/**************************************************************************/
VOID _gx_display_driver_16bpp_rotated_pixel_write(GX_DRAW_CONTEXT *context, INT x, INT y, GX_COLOR color)
{
USHORT *put = (USHORT *)context -> gx_draw_context_memory;

    /* Calculate address of scan line.  */
    if (context -> gx_draw_context_display -> gx_display_rotation_angle == GX_SCREEN_ROTATION_CW)
    {
        put += context -> gx_draw_context_pitch * (context -> gx_draw_context_canvas -> gx_canvas_x_resolution - x - 1);

        /* Step in by y coordinate.  */
        put += y;
    }
    else
    {
        put += context -> gx_draw_context_pitch * x;

        /* Step in by y coordinate.  */
        put += (context -> gx_draw_context_canvas -> gx_canvas_y_resolution - y - 1);
    }

    /* Write the pixel value.  */
    *put = (USHORT)color;
}