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incubator-nuttx/graphics/nxbe/nxbe_filltrapezoid.c

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/****************************************************************************
* graphics/nxbe/nxbe_filltrapezoid.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <assert.h>
#include <fixedmath.h>
#include <nuttx/nx/nxglib.h>
#include "nxbe.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifndef MIN
# define MIN(a,b) (((a) < (b)) ? (a) : (b))
#endif
#ifndef MAX
# define MAX(a,b) (((a) > (b)) ? (a) : (b))
#endif
/****************************************************************************
* Private Types
****************************************************************************/
struct nxbe_filltrap_s
{
struct nxbe_clipops_s cops;
struct nxgl_trapezoid_s trap;
nxgl_mxpixel_t color;
};
/****************************************************************************
* 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;
#ifdef CONFIG_NX_UPDATE
struct nxgl_rect_s update;
#endif
/* Draw the trapezond */
plane->dev.filltrapezoid(&plane->pinfo, &fillinfo->trap, rect,
fillinfo->color);
#ifdef CONFIG_NX_UPDATE
/* Notify external logic that the display has been updated */
update.pt1.x = MIN(MAX(fillinfo->trap.top.x1, rect->pt1.x),
MAX(fillinfo->trap.bot.x1, rect->pt1.x));
update.pt1.y = MAX(fillinfo->trap.top.y, rect->pt1.y);
update.pt2.x = MAX(MIN(fillinfo->trap.top.x2, rect->pt2.x),
MIN(fillinfo->trap.bot.x2, rect->pt2.x));
update.pt2.y = MIN(fillinfo->trap.bot.y, rect->pt2.y);
nxbe_notify_rectangle(plane->driver, &update);
#endif
}
/****************************************************************************
* Name: nxbe_filltrapezoid_dev
*
* Description:
* Fill the specified rectangle in the device graphics memory with the
* specified color
*
* Input Parameters:
* wnd - The window structure reference
* bounds - Trapezoid bounding box (in absolute window coordinates)
* rect - The location to be filled (in relative window coordinates)
* col - The color to use in the fill
*
* Returned Value:
* None
*
****************************************************************************/
static inline void
nxbe_filltrapezoid_dev(FAR struct nxbe_window_s *wnd,
FAR const struct nxgl_rect_s *bounds,
FAR const struct nxgl_trapezoid_s *trap,
nxgl_mxpixel_t color[CONFIG_NX_NPLANES])
{
struct nxbe_filltrap_s info;
int i;
info.cops.visible = nxbe_clipfilltrapezoid;
info.cops.obscured = nxbe_clipnull;
nxgl_trapcopy(&info.trap, trap);
/* Process each color plane */
#if CONFIG_NX_NPLANES > 1
for (i = 0; i < wnd->be->vinfo.nplanes; i++)
#else
i = 0;
#endif
{
/* Rend any part of the trapezoid that is not occluded by a window
* higher in the hierarchy.
*/
info.color = color[i];
nxbe_clipper(wnd->above, bounds, NX_CLIPORDER_DEFAULT,
&info.cops, &wnd->be->plane[i]);
#ifdef CONFIG_NX_SWCURSOR
/* Backup and redraw the cursor in the modified 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. This may result in an
* excessive number of cursor updates.
*/
nxbe_cursor_backupdraw_dev(wnd->be, bounds, i);
#endif
}
}
/****************************************************************************
* Name: nxbe_filltrapezoid_pwfb
*
* Description:
* Fill the specified rectangle in the window with the specified color
*
* Input Parameters:
* wnd - The window structure reference
* bounds - Trapezoid bounding box (in absolute window coordinates)
* rect - The location to be filled (in relative window coordinates)
* col - The color to use in the fill
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_NX_RAMBACKED
static inline void
nxbe_filltrapezoid_pwfb(FAR struct nxbe_window_s *wnd,
FAR const struct nxgl_rect_s *bounds,
FAR const struct nxgl_trapezoid_s *trap,
nxgl_mxpixel_t color[CONFIG_NX_NPLANES])
{
FAR const void *src[CONFIG_NX_NPLANES];
struct nxgl_trapezoid_s reltrap;
struct nxgl_rect_s relbounds;
struct nxgl_point_s origin;
unsigned int bpp;
/* Both the rectangle that we receive here are in absolute device
* coordinates. We need to restore both to windows relative coordinates.
*/
nxgl_trapoffset(&reltrap, trap,
-wnd->bounds.pt1.x, -wnd->bounds.pt1.y);
nxgl_rectoffset(&relbounds, bounds,
-wnd->bounds.pt1.x, -wnd->bounds.pt1.y);
/* Copy the trapezoidal region to the framebuffer (no clipping).
* REVISIT: Assumes a single color plane.
*/
DEBUGASSERT(wnd->be->plane[0].pwfb.filltrapezoid != NULL);
wnd->be->plane[0].pwfb.filltrapezoid(wnd, &reltrap, &relbounds,
color[0]);
/* Get the source of address of the trapezoid bounding box in the
* framebuffer.
*/
bpp = wnd->be->plane[0].pinfo.bpp;
src[0] = (FAR const void *)
((FAR uint8_t *)wnd->fbmem +
relbounds.pt1.y * wnd->stride +
((bpp * relbounds.pt1.x) >> 3));
/* For resolutions less than 8-bits, the starting pixel will be contained
* in the byte pointed to by src[0]but may not be properly aligned for
* the transfer. We fix this by modifying the origin.
*/
origin.x = relbounds.pt1.x;
origin.y = relbounds.pt1.y;
switch (bpp)
{
#ifndef CONFIG_NX_DISABLE_1BPP
case 1: /* 1 bit per pixel */
{
origin.x &= ~7;
}
break;
#endif
#ifndef CONFIG_NX_DISABLE_2BPP
case 2: /* 2 bits per pixel */
{
origin.x &= ~3;
}
break;
#endif
#ifndef CONFIG_NX_DISABLE_4BPP
case 4: /* 4 bits per pixel */
{
origin.x &= ~1;
}
break;
#endif
default:
break;
}
/* Copy the portion of the per-window framebuffer in the bounding box
* to the device graphics memory.
*/
nxbe_flush(wnd, &relbounds, src, &origin, wnd->stride);
}
#endif
/****************************************************************************
* 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
*
* Returned Value:
* 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 nxgl_rect_s remaining;
struct nxgl_rect_s absclip;
struct nxgl_trapezoid_s devtrap;
DEBUGASSERT(wnd != NULL && clip != NULL && trap != NULL);
/* Offset the trapezoid by the window origin to position it within
* the device graphics coordinate system.
*/
nxgl_trapoffset(&devtrap, trap, wnd->bounds.pt1.x, wnd->bounds.pt1.y);
/* Create a bounding box that contains the trapezoid */
remaining.pt1.x = b16toi(ngl_min(devtrap.top.x1, devtrap.bot.x1));
remaining.pt1.y = devtrap.top.y;
remaining.pt2.x = b16toi(ngl_max(devtrap.top.x2, devtrap.bot.x2));
remaining.pt2.y = devtrap.bot.y;
/* Clip to any user specified clipping window */
nxgl_rectoffset(&absclip, clip, wnd->bounds.pt1.x, wnd->bounds.pt1.y);
nxgl_rectintersect(&remaining, &remaining, &absclip);
/* 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))
{
#ifdef CONFIG_NX_RAMBACKED
/* Update the pre-window framebuffer first, then the device memory. */
if (NXBE_ISRAMBACKED(wnd))
{
nxbe_filltrapezoid_pwfb(wnd, &remaining, &devtrap, color);
}
else
#endif
/* Don't update hidden windows */
if (!NXBE_ISHIDDEN(wnd))
{
/* Update only the graphics device memory. */
nxbe_filltrapezoid_dev(wnd, &remaining, &devtrap, color);
}
}
}
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