nuttx/graphics/nxbe/nxbe_setpixel.c
Gregory Nutt da314276a1 NX graphics: This commit adds support for hiding windows. This features is needed by Twm4Nx: When a window is iconfied, the icon should appear on the background and the window should disappear (i.e., be hidden). The windows needs to remain healthy and to be updated in all ways, but it cannot affect the display content.
Converserely, when the icon is clicked, the icon needs to be hidden on the backgound and the window needs to be restored in its current state (which may be different than the state of the window at the time it was iconified.

Squashed commit of the following:

    graphics/:  Add checks in all places that I can think to avoid doing something stupid with hidden windows

    Improve some naming

    Add a new file missing in last commit.

    graphics/:  Initial, incomplete support for hiding windows.
2019-05-05 15:21:52 -06:00

214 lines
6.7 KiB
C

/****************************************************************************
* graphics/nxbe/nxbe_setpixel.c
*
* Copyright (C) 2011, 2016, 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 <nuttx/nx/nxglib.h>
#include <nuttx/nx/nx.h>
#include "nxbe.h"
/****************************************************************************
* Private Types
****************************************************************************/
struct nxbe_setpixel_s
{
struct nxbe_clipops_s cops;
nxgl_mxpixel_t color;
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: nxbe_clipfill
*
* Description:
* Called from nxbe_clipper() to performed the fill operation on visible portions
* of the rectangle.
*
****************************************************************************/
static void nxbe_clipfill(FAR struct nxbe_clipops_s *cops,
FAR struct nxbe_plane_s *plane,
FAR const struct nxgl_rect_s *rect)
{
struct nxbe_setpixel_s *fillinfo = (struct nxbe_setpixel_s *)cops;
/* Set the pixel in the graphics device. */
plane->dev.setpixel(&plane->pinfo, &rect->pt1, fillinfo->color);
#ifdef CONFIG_NX_UPDATE
/* Notify external logic that the display has been updated */
nx_notify_rectangle(&plane->pinfo, rect);
#endif
}
/****************************************************************************
* Name: nxbe_setpixel
*
* Description:
* Fill the specified rectangle in the window with the specified color
*
* Input Parameters:
* wnd - The window structure reference
* rect - The location to be filled
* col - The color to use in the fill
*
* Returned Value:
* None
*
****************************************************************************/
static void nxbe_setpixel_dev(FAR struct nxbe_window_s *wnd,
FAR const struct nxgl_point_s *pos,
nxgl_mxpixel_t color[CONFIG_NX_NPLANES])
{
struct nxbe_setpixel_s info;
struct nxgl_rect_s rect;
int i;
/* Offset the position by the window origin */
nxgl_vectoradd(&rect.pt1, pos, &wnd->bounds.pt1);
/* Make sure that the point is within the limits of the window
* and of the background screen.
*/
if (!nxgl_rectinside(&wnd->bounds, &rect.pt1) ||
!nxgl_rectinside(&wnd->be->bkgd.bounds, &rect.pt1))
{
return;
}
/* Then create a bounding box and render the point if there it
* is exposed.
*/
rect.pt2.x = rect.pt1.x;
rect.pt2.y = rect.pt1.y;
#if CONFIG_NX_NPLANES > 1
for (i = 0; i < wnd->be->vinfo.nplanes; i++)
#else
i = 0;
#endif
{
info.cops.visible = nxbe_clipfill;
info.cops.obscured = nxbe_clipnull;
info.color = color[i];
/* Draw the point (if it is visible) */
nxbe_clipper(wnd->above, &rect, NX_CLIPORDER_DEFAULT,
&info.cops, &wnd->be->plane[i]);
#ifdef CONFIG_NX_SWCURSOR
/* Update cursor backup memory and redraw the cursor in the modified
* window region.
*
* REVISIT: This and the following logic belongs in the function
* nxbe_clipfill(). It is here only because the struct
* nxbe_state_s (wnd->be) is not available at that point.
*/
nxbe_cursor_backupdraw_dev(wnd->be, &rect, i);
#endif
}
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxbe_setpixel
*
* Description:
* Fill the specified rectangle in the window with the specified color
*
* Input Parameters:
* wnd - The window structure reference
* rect - The location to be filled
* col - The color to use in the fill
*
* Returned Value:
* None
*
****************************************************************************/
void nxbe_setpixel(FAR struct nxbe_window_s *wnd,
FAR const struct nxgl_point_s *pos,
nxgl_mxpixel_t color[CONFIG_NX_NPLANES])
{
DEBUGASSERT(wnd != NULL && pos != NULL);
#ifdef CONFIG_NX_RAMBACKED
/* If this window supports a pre-window frame buffer then shadow the full,
* unclipped bitmap in that framebuffer.
* REVISIT: The logic to set a pixel in the per-window frame buffer is missing
*/
DEBUGASSERT(!NXBE_ISRAMBACKED(wnd));
#endif
/* Don't update hidden windows */
if (!NXBE_ISHIDDEN(wnd))
{
nxbe_setpixel_dev(wnd, pos, color);
#ifdef CONFIG_NX_SWCURSOR
/* Was the software cursor visible?
* REVISIT: Missing logic for the case where the update clobbers a
* single pixel in the cursor image
*/
DEBUGASSERT(!wnd->be->cursor.visible);
#endif
}
}