px4-firmware/nuttx/graphics/nxbe/nxbe_filltrapezoid.c

174 lines
6.1 KiB
C

/****************************************************************************
* graphics/nxbe/nxbe_filltrapezoid.c
*
* Copyright (C) 2008-2009, 2012 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 <fixedmath.h>
#include <nuttx/nx/nxglib.h>
#include "nxbe.h"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
struct nxbe_filltrap_s
{
struct nxbe_clipops_s cops;
struct nxgl_trapezoid_s trap;
nxgl_mxpixel_t color;
};
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: nxbe_clipfilltrapezoid
*
* Description:
* Called from nxbe_clipper() to performed the fill operation on visible portions
* of the rectangle.
*
****************************************************************************/
static void nxbe_clipfilltrapezoid(FAR struct nxbe_clipops_s *cops,
FAR struct nxbe_plane_s *plane,
FAR const struct nxgl_rect_s *rect)
{
struct nxbe_filltrap_s *fillinfo = (struct nxbe_filltrap_s *)cops;
plane->filltrapezoid(&plane->pinfo, &fillinfo->trap, rect, fillinfo->color);
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxbe_filltrapezoid
*
* Description:
* Fill the specified rectangle in the window with the specified color
*
* Input Parameters:
* wnd - The window structure reference
* clip - Clipping region (in relative window coordinates)
* rect - The location to be filled (in relative window coordinates)
* col - The color to use in the fill
*
* Return:
* None
*
****************************************************************************/
void nxbe_filltrapezoid(FAR struct nxbe_window_s *wnd,
FAR const struct nxgl_rect_s *clip,
FAR const struct nxgl_trapezoid_s *trap,
nxgl_mxpixel_t color[CONFIG_NX_NPLANES])
{
struct nxbe_filltrap_s info;
struct nxgl_rect_s remaining;
int i;
#ifdef CONFIG_DEBUG
if (!wnd || !trap)
{
return;
}
#endif
/* Offset the trapezoid by the window origin to position it within
* the framebuffer region
*/
nxgl_trapoffset(&info.trap, trap, wnd->bounds.pt1.x, wnd->bounds.pt1.y);
/* Create a bounding box that contains the trapezoid */
remaining.pt1.x = b16toi(ngl_min(info.trap.top.x1, info.trap.bot.x1));
remaining.pt1.y = info.trap.top.y;
remaining.pt2.x = b16toi(ngl_max(info.trap.top.x2, info.trap.bot.x2));
remaining.pt2.y = info.trap.bot.y;
/* Clip to any user specified clipping window */
if (clip)
{
struct nxgl_rect_s tmp;
nxgl_rectoffset(&tmp, clip, wnd->bounds.pt1.x, wnd->bounds.pt1.y);
nxgl_rectintersect(&remaining, &remaining, &tmp);
}
/* Clip to the limits of the window and of the background screen */
nxgl_rectintersect(&remaining, &remaining, &wnd->bounds);
nxgl_rectintersect(&remaining, &remaining, &wnd->be->bkgd.bounds);
if (!nxgl_nullrect(&remaining))
{
info.cops.visible = nxbe_clipfilltrapezoid;
info.cops.obscured = nxbe_clipnull;
/* Then process each color plane */
#if CONFIG_NX_NPLANES > 1
for (i = 0; i < wnd->be->vinfo.nplanes; i++)
#else
i = 0;
#endif
{
info.color = color[i];
nxbe_clipper(wnd->above, &remaining, NX_CLIPORDER_DEFAULT,
&info.cops, &wnd->be->plane[i]);
}
}
}