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134 lines
4.7 KiB
134 lines
4.7 KiB
/**************************************************************************** |
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* graphics/nxbe/nxbe_redraw.c |
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* |
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* Copyright (C) 2008-2009, 2011 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 <stdbool.h> |
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#include <errno.h> |
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#include <debug.h> |
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#include <nuttx/nx/nxglib.h> |
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#include "nxbe.h" |
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#include "nxfe.h" |
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/**************************************************************************** |
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* Pre-Processor Definitions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Types |
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****************************************************************************/ |
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struct nxbe_visible_s |
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{ |
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struct nxbe_clipops_s cops; |
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bool visible; |
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}; |
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/**************************************************************************** |
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* Private Data |
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****************************************************************************/ |
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/**************************************************************************** |
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* Public Data |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Name: nxbe_clipvisible |
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****************************************************************************/ |
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static void nxbe_clipvisible(FAR struct nxbe_clipops_s *cops, |
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FAR struct nxbe_plane_s *plane, |
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FAR const struct nxgl_rect_s *rect) |
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{ |
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FAR struct nxbe_visible_s *info = (FAR struct nxbe_visible_s *)cops; |
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info->visible = true; |
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} |
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/**************************************************************************** |
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* Public Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Name: nxbe_visible |
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* |
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* Descripton: |
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* Return true if the point, pt, in window wnd is visible. pt is in |
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* absolute screen coordinates |
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* |
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****************************************************************************/ |
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bool nxbe_visible(FAR struct nxbe_window_s *wnd, |
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FAR const struct nxgl_point_s *pos) |
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{ |
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struct nxbe_visible_s info; |
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/* Check if the absolute position lies within the window */ |
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if (!nxgl_rectinside(&wnd->bounds, pos)) |
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{ |
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return false; |
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} |
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/* If this is the top window, then the psition is visible */ |
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if (!wnd->above) |
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{ |
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return true; |
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} |
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/* The position within the window range, but the window is not at |
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* the top. We will have to work harder to determine if the point |
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* visible |
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*/ |
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info.cops.visible = nxbe_clipvisible; |
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info.cops.obscured = nxbe_clipnull; |
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info.visible = false; |
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nxbe_clipper(wnd->above, &wnd->bounds, NX_CLIPORDER_DEFAULT, |
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&info.cops, &wnd->be->plane[0]); |
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return info.visible; |
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}
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