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incubator-nuttx/graphics/nxbe/nxbe_setsize.c

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/****************************************************************************
* graphics/nxbe/nxbe_setsize.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <assert.h>
#include <debug.h>
#include <sys/param.h>
#ifdef CONFIG_NX_RAMBACKED
# include <string.h>
#ifdef CONFIG_BUILD_KERNEL
# include <nuttx/pgalloc.h>
#else
# include <nuttx/kmalloc.h>
#endif
#endif
#include <nuttx/nx/nxglib.h>
#include "nxbe.h"
#include "nxmu.h"
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: nxbe_realloc
*
* Description:
* After the display size has changed, reallocate the pre-window frame
* buffer for the new framebuffer size.
*
* REVISIT: This currently takes a brute force force approach, allocating
* the new framebuffer while the old framebuffer is still in place. There
* may be some clever way to do this reallocation in place.
*
****************************************************************************/
#ifdef CONFIG_NX_RAMBACKED
static void nxbe_realloc(FAR struct nxbe_window_s *wnd,
FAR struct nxgl_rect_s *oldbounds)
{
FAR nxgl_mxpixel_t *newfb;
FAR uint8_t *src;
FAR uint8_t *dest;
struct nxgl_rect_s bounds;
nxgl_coord_t minheight;
nxgl_coord_t newwidth;
nxgl_coord_t newheight;
nxgl_coord_t oldwidth;
nxgl_coord_t oldheight;
nxgl_coord_t row;
size_t newfbsize;
unsigned int minstride;
unsigned int newstride;
unsigned int bpp;
#ifdef CONFIG_BUILD_KERNEL
unsigned int newnpages;
#endif
/* Allocate framebuffer memory if the per-window framebuffer feature has
* been selected.
*
* REVISIT: This initial state of the framebuffer is uninitialized and
* not synchronized with the graphic device content. It will take a full
* screen update from the application to force the framebuffer and device
* to be consistent.
*/
if (NXBE_ISRAMBACKED(wnd))
{
oldwidth = oldbounds->pt2.x - oldbounds->pt1.x + 1;
oldheight = oldbounds->pt2.y - oldbounds->pt1.y + 1;
newwidth = wnd->bounds.pt2.x - wnd->bounds.pt1.x + 1;
newheight = wnd->bounds.pt2.y - wnd->bounds.pt1.y + 1;
bpp = wnd->be->plane[0].pinfo.bpp;
newstride = (bpp * newwidth + 7) >> 3;
newfbsize = newstride * newheight;
#ifdef CONFIG_BUILD_KERNEL
/* Re-allocate memory from the page pool. */
/* Determine the number of pages to be allocated. */
newnpages = (uint16_t)MM_NPAGES(newfbsize);
/* Allocate the pages */
newfb = (FAR nxgl_mxpixel_t *)mm_pgalloc(newnpages);
if (newfb == NULL)
{
/* Fall back to no RAM back up */
gerr("ERROR: mm_pgalloc() failed for fbsize=%lu, npages=%u\n",
(unsigned long)newfbsize, npages);
mm_pgfree(wnd->fbmem, wnd->npages);
wnd->stride = 0;
wnd->npages = 0;
wnd->fbmem = NULL;
NXBE_CLRRAMBACKED(wnd);
return;
}
#else
/* Re-allocate memory from the user space heap. */
newfb = (FAR nxgl_mxpixel_t *)kumm_malloc(newfbsize);
if (newfb == NULL)
{
/* Fall back to no RAM back up */
gerr("ERROR: kumm_malloc() failed for fbsize=%lu\n",
(unsigned long)newfbsize);
kumm_free(wnd->fbmem);
wnd->stride = 0;
wnd->fbmem = NULL;
NXBE_CLRRAMBACKED(wnd);
return;
}
#endif
/* Copy the content of the old framebuffer to the new frame buffer */
minheight = MIN(oldheight, newheight);
minstride = MIN(wnd->stride, newstride);
/* Process each line one at a time */
for (src = (FAR uint8_t *)wnd->fbmem, dest = (FAR uint8_t *)newfb,
row = 0;
row < minheight;
src += wnd->stride, dest += newstride, row++)
{
/* Copy valid row data */
memcpy(dest, src, minstride);
/* Pad any extra pixel data on the right (with zeroes?) */
if (minstride < newstride)
{
memset(dest + minstride, 0, newstride - minstride);
}
}
/* Pad any extra lines at the bottom (with zeroes?) */
if (row < newheight)
{
size_t nbytes = newstride * (newheight - row);
memset(dest, 0, nbytes);
}
/* Free the old framebuffer and configure for the new framebuffer */
#ifdef CONFIG_BUILD_KERNEL
mm_pgfree(wnd->fbmem, wnd->npages);
wnd->npages = newnpages;
#else
kumm_free(wnd->fbmem);
#endif
wnd->stride = newstride;
wnd->fbmem = newfb;
/* If the window became wider, then send a message requesting an update
* of the new territory on the right.
*/
if (oldwidth < newwidth)
{
/* Get a bounding box in device coordinates */
bounds.pt1.x = wnd->bounds.pt1.x + oldwidth;
bounds.pt1.y = wnd->bounds.pt1.y;
bounds.pt2.x = wnd->bounds.pt2.x;
bounds.pt2.y = wnd->bounds.pt2.y + MIN(oldheight, newheight) - 1;
/* Send the redraw request */
nxmu_redrawreq(wnd, &bounds);
}
/* If the window became taller, then send a message requesting an
* update of the new territory at the bottom.
*/
if (oldheight < newheight)
{
/* Get a bounding box in device coordinates */
bounds.pt1.x = wnd->bounds.pt1.x;
bounds.pt1.y = wnd->bounds.pt1.y + oldheight;
bounds.pt2.x = wnd->bounds.pt2.x;
bounds.pt2.y = wnd->bounds.pt2.y;
/* Send the redraw request */
nxmu_redrawreq(wnd, &bounds);
}
}
}
#else
# define nxbe_realloc(w,b)
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxbe_setsize
*
* Description:
* This function checks for intersections and redraws the display after
* a change in the size of a window.
*
****************************************************************************/
void nxbe_setsize(FAR struct nxbe_window_s *wnd,
FAR const struct nxgl_size_s *size)
{
struct nxgl_rect_s bounds;
DEBUGASSERT(wnd != NULL && size != NULL);
/* Save the 'before' size of the window's bounding box */
nxgl_rectcopy(&bounds, &wnd->bounds);
/* Add the window origin to the supplied size get the new window bounding
* box
*/
wnd->bounds.pt2.x = wnd->bounds.pt1.x + size->w - 1;
wnd->bounds.pt2.y = wnd->bounds.pt1.y + size->h - 1;
/* Clip the new bounding box so that lies within the background screen */
nxgl_rectintersect(&wnd->bounds, &wnd->bounds, &wnd->be->bkgd.bounds);
/* Report the new size/position. The application needs to know the new
* size before getting redraw requests.
*/
nxmu_reportposition(wnd);
/* Re-allocate the per-window framebuffer memory for the new window size. */
nxbe_realloc(wnd, &bounds);
/* We need to update the larger of the two regions described by the
* original bounding box and the new bounding box. That will be the
* union of the two bounding boxes.
*/
nxgl_rectunion(&bounds, &bounds, &wnd->bounds);
/* Then redraw this window AND all windows below it. Having resized the
* window, we may have exposed previoulsy obscured portions of windows
* below this one.
*/
nxbe_redrawbelow(wnd->be, wnd, &bounds);
}
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