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