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nuttx-mirror/graphics/nxbe/nxbe_cursor.c

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/****************************************************************************
* graphics/nxbe/nxbe_cursor.c
*
* Copyright (C) 2019 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <assert.h>
#include "nxglib_bitblit.h"
#include "nxbe.h"
#if defined(CONFIG_NX_SWCURSOR) || defined(CONFIG_NX_HWCURSOR)
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: nxbe_map_color
*
* Description:
* Map a 2-bit cursor pixel value to a device pixel value
*
* Input Parameters:
* be - The back-end state structure instance
* pixel - Pixel to be mapped
*
* Returned Value:
* The mapped pixel.
*
****************************************************************************/
static nxgl_mxcolor_t nxbe_map_color(FAR struct nxbe_state_s *be, int plane,
uint8_t pixel)
{
switch pixel
{
case 0:
default:
return 0; /* Should not happen */
case 1:
return be->cursor.color1[plane];
break;
case 2:
return be->cursor.color2[plane];
break;
case 3:
return be->cursor.color3[plane];
break;
}
}
/****************************************************************************
* Name: nxbe_cursor_update
*
* Description:
* Update the cursor region
*
* Input Parameters:
* be - The back-end state structure instance
*
* Returned Value:
* None
*
****************************************************************************/
static void nxbe_cursor_update(FAR struct nxbe_state_s *be, int plane)
{
struct nxgl_rect_s intersection;
FAR struct nxbe_plane_s *plane;
FAR unsigned int *sstride;
FAR unsigned int *dstride;
FAR uint8_t *fbmem;
FAR uint8_t *src;
FAR uint8_t *sline;
FAR NXGL_PIXEL_T *dest;
FAR uint8_t *dline;
nxgl_coord_t width;
nxgl_coord_t height;
int row;
int col;
/* Handle the case some or all of the cursor image is off of the display. */
nxgl_rectintersect(&intersction, &be->cursor.bounds, &be->backgd.bounds);
if (!nxgl_nullrect(&intersection))
{
/* Get the width and the height of the images in pixels/rows */
width = be->cursor.bounds.pt2.x = be->cursor.bounds.pt1.x + 1;
height = be->cursor.bounds.pt2.y = be->cursor.bounds.pt1.xy + 1;
/* Get the width of the images in bytes. */
sstride = (width + 3) >> 2; /* 2 bits per pixel, 4 pixels per byte */
plane = &wnd->be->plane[0];
dstride = plane->pinfo.stride;
/* Erase the old cursor position */
#warning Missing logic
/* Update any cursor graphics on top of the device display to include
* the modified cursor.
*
* REVISIT: This will only work for a single plane and for bits per pixel
* greater than or equal to 8.
*/
fbmem = (FAR uint8_t *)plane->pinfo.fbmem;
sline = be->cursor.image;
dline = (FAR uint8_t *)fbmem + dstride * be->cursor.bounds.pt1.y +
NXGL_SCALEX(be->cursor.bounds.pt1.x);
for (row = 0; row < height; row++)
{
src = sline;
dest = (FAR NXGL_PIXEL_T *)dline;
for (col = 0; col < width; )
{
/* Data is always packed MS first */
uint8_t spixel = (*src & >> 6) & 3
if (pixel != 0)
{
*dest = nxbe_map_color(be, 0, spixel);
}
col++;
dest++;
if (col < width)
{
spixel = (*src & >> 4) & 3
if (pixel != 0)
{
*dest = nxbe_map_color(be, 0, spixel);
}
}
col++;
dest++;
if (col < width)
{
spixel = (*src & >> 2) & 3
if (pixel != 0)
{
*dest = nxbe_map_color(be, 0, spixel);
}
}
col++;
dest++;
if (col < width)
{
spixel = *src & 3
if (pixel != 0)
{
*dest = nxbe_map_color(be, 0, spixel);
}
}
col++;
dest++;
/* Update source column addresses */
src++;
}
/* Update the row addresses */
sline += sstride;
dline += dstride;
}
}
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxbe_cursor_enable
*
* Description:
* Enable/disable presentation of the cursor
*
* Input Parameters:
* be - The back-end state structure instance
* enable - True: show the cursor, false: hide the cursor.
*
* Returned Value:
* None
*
****************************************************************************/
void nxbe_cursor_enable(FAR struct nxbe_state_s *be, bool enable)
{
/* Are we enabling the cursor */
if (enable && !be->cursor.visible)
{
/* Mark the cursor visible */
be->cursor.visible = true;
}
/* Are we disabling the cursor ? */
else if (!enable && be->cursor.visible)
{
/* Mark the cursor not visible */
be->cursor.visible = false;
}
else
{
/* No change in state.. do nothing */
return;
}
#ifdef CONFIG_NX_SWCURSOR
/* For the software cursor, we need to update the cursor region */
nxbe_cursor_update(be);
#else
/* For a hardware cursor, this would require some interaction with the
* grahics device.
*/
# error Missing logic
#endif
}
/****************************************************************************
* Name: nxbe_cursor_setimage
*
* Description:
* Set the cursor image.
*
* The image is provided a a 2-bits-per-pixel image. The two bit incoding
* is as followings:
*
* 00 - The transparent background
* 01 - Color1: The main color of the cursor
* 10 - Color2: The color of any border
* 11 - Color3: A blend color for better imaging (fake anti-aliasing).
*
* Input Parameters:
* be - The back-end state structure instance
* image - Describes the cursor image in the expected format.
*
* Returned Value:
* None
*
****************************************************************************/
#if defined(CONFIG_NX_HWCURSORIMAGE) || defined(CONFIG_NX_SWCURSOR)
void nxbe_cursor_setimage(FAR struct nxbe_state_s *be,
FAR struct nx_cursorimage_s *image);
{
#warning Missing logic
}
#endif
/****************************************************************************
* Name: nxcursor_setposition
*
* Description:
* Move the cursor to the specified position
*
* Input Parameters:
* be - The back-end state structure instance
* pos - The new cursor position
*
* Returned Value:
* None
*
****************************************************************************/
void nxcursor_setposition(FAR struct nxbe_state_s *be,
FAR const struct nxgl_point_s *pos)
{
#warning Missing logic
}
#endif /* CONFIG_NX_SWCURSOR || CONFIG_NX_HWCURSOR */
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