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118 lines
4.7 KiB
118 lines
4.7 KiB
/**************************************************************************** |
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* graphics/nxtk/nxtk_subwindowclip.c |
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* |
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* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr> |
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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 <stdlib.h> |
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#include <errno.h> |
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#include <debug.h> |
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#include <nuttx/nx/nx.h> |
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#include <nuttx/nx/nxtk.h> |
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#include "nxfe.h" |
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#include "nxtk_internal.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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/**************************************************************************** |
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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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* Public Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Name: nxtk_subwindowclip |
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* |
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* Description: |
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* We are given a 'src' rectangle in sub-window, relative coordinates |
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* (i.e., (0,0) is the top left corner of the sub-window). This function |
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* will (1) clip that src rectangle so that it lies within the sub-window |
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* bounds, and then (2) move the rectangle to that it is relative to the |
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* containing window (i.e., (0,0) is the top left corner of the containing |
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* window). |
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* |
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* Input parameters: |
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* fwnd - The framed window to be used |
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* dest - The locaton to put the result |
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* src - The src rectangle in relative sub-window coordinates |
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* bounds - The subwindow bounds in absolute screen coordinates. |
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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 nxtk_subwindowclip(FAR struct nxtk_framedwindow_s *fwnd, |
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FAR struct nxgl_rect_s *dest, |
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FAR const struct nxgl_rect_s *src, |
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FAR const struct nxgl_rect_s *bounds) |
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{ |
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struct nxgl_rect_s tmp; |
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/* Temporarily, position the src rectangle in absolute screen coordinates */ |
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nxgl_rectoffset(&tmp, src, bounds->pt1.x, bounds->pt1.y); |
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/* Clip the src rectangle to lie within the client window region */ |
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nxgl_rectintersect(&tmp, &tmp, bounds); |
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/* Then move the rectangle so that is relative to the containing window, not the |
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* client subwindow |
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*/ |
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nxgl_rectoffset(dest, &tmp, -fwnd->wnd.bounds.pt1.x, -fwnd->wnd.bounds.pt1.y); |
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}
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