151 lines
5.1 KiB
C
151 lines
5.1 KiB
C
/****************************************************************************
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* graphics/nxglib/nxglib_cursor_backup.c
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*
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* Copyright (C) 2019 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <assert.h>
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#include <nuttx/nx/nxglib.h>
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#include "nxglib_bitblit.h"
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#include "../nxbe/nxbe.h"
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#include "nxglib.h"
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#ifdef CONFIG_NX_SWCURSOR
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxglib_cursor_backup
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*
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* Description:
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* Saved the cursor background data from the device graphics memory into an
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* internal save area. This saved image will be used to "erase" the cursor
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* when necessary.
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*
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* Input Parameters:
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* be - The back-end state structure instance
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* bounds - The region of the display that has been modified.
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* planeno - The color plane being drawn
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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void NXGL_FUNCNAME(nxglib_cursor_backup, NXGLIB_SUFFIX)
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(FAR struct nxbe_state_s *be, FAR const struct nxgl_rect_s *bounds, int planeno)
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{
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struct nxgl_rect_s intersection;
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struct nxgl_point_s origin;
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FAR struct nxbe_plane_s *plane;
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FAR uint8_t *fbmem;
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FAR const uint8_t *sline;
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FAR uint8_t *dline;
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FAR const FAR NXGL_PIXEL_T *src;
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FAR FAR NXGL_PIXEL_T *dest;
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nxgl_coord_t width;
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nxgl_coord_t height;
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nxgl_coord_t sstride;
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nxgl_coord_t dstride;
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int row;
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int col;
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/* Handle the case some or all of the backup image is off of the display. */
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nxgl_rectintersect(&intersection, &be->cursor.bounds, &be->bkgd.bounds);
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/* Check if there is anything in the modified region that we need to handle. */
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nxgl_rectintersect(&intersection, &intersection, bounds);
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if (!nxgl_nullrect(&intersection))
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{
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/* Get the width and the height of the images in pixels/rows */
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width = be->cursor.bounds.pt2.x - be->cursor.bounds.pt1.x + 1;
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height = be->cursor.bounds.pt2.y - be->cursor.bounds.pt1.y + 1;
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/* Get the width of the images in bytes. */
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plane = &be->plane[planeno];
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sstride = plane->pinfo.stride;
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dstride = NXGL_SCALEX(width);
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/* Get the origin position in the background image */
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nxgl_vectsubtract(&origin, &intersection.pt1, &be->cursor.bounds.pt1);
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/* Get the source and destination addresses */
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fbmem = (FAR uint8_t *)plane->pinfo.fbmem;
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sline = (FAR uint8_t *)fbmem + sstride * be->cursor.bounds.pt1.y +
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NXGL_SCALEX(be->cursor.bounds.pt1.x);
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dline = (FAR uint8_t *)be->cursor.bkgd + dstride * origin.y +
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NXGL_SCALEX(origin.y);
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/* Save the cursor background by copying the device graphics memory */
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/* Loop for each row */
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for (row = 0; row < height; row++)
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{
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/* Reset to the beginning of the line */
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src = (FAR NXGL_PIXEL_T *)sline;
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dest = (FAR NXGL_PIXEL_T *)dline;
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/* Loop for each column */
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for (col = 0; col < width; col++)
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{
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*dest++ = *src++;
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}
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/* Update the row addresses to the next row */
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sline += sstride;
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dline += dstride;
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}
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}
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}
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#endif /* CONFIG_NX_SWCURSOR */
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