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Diffstat (limited to 'nuttx/graphics/nxbe/nxbe_bitmap.c')
| -rw-r--r-- | nuttx/graphics/nxbe/nxbe_bitmap.c | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/nuttx/graphics/nxbe/nxbe_bitmap.c b/nuttx/graphics/nxbe/nxbe_bitmap.c new file mode 100644 index 000000000..991b91d82 --- /dev/null +++ b/nuttx/graphics/nxbe/nxbe_bitmap.c @@ -0,0 +1,192 @@ +/**************************************************************************** + * graphics/nxbe/nxbe_bitmap.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 <errno.h> +#include <debug.h> + +#include <nuttx/nx/nxglib.h> +#include "nxbe.h" + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +struct nx_bitmap_s +{ + struct nxbe_clipops_s cops; + FAR const void *src; /* The start of the source image. */ + struct nxgl_point_s origin; /* Offset into the source image data */ + unsigned int stride; /* The width of the full source image in pixels. */ +}; + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: nxs_clipcopy + * + * Description: + * Called from nxbe_clipper() to performed the fill operation on visible portions + * of the rectangle. + * + ****************************************************************************/ + +static void nxs_clipcopy(FAR struct nxbe_clipops_s *cops, + FAR struct nxbe_plane_s *plane, + FAR const struct nxgl_rect_s *rect) +{ + struct nx_bitmap_s *bminfo = (struct nx_bitmap_s *)cops; + plane->copyrectangle(&plane->pinfo, rect, bminfo->src, + &bminfo->origin, bminfo->stride); +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: nxbe_bitmap + * + * Description: + * Copy a rectangular region of a larger image into the rectangle in the + * specified window. + * + * Input Parameters: + * wnd - The window that will receive the bitmap image + * dest - Describes the rectangular on the display that will receive the + * the bit map. + * src - The start of the source image. + * origin - The origin of the upper, left-most corner of the full bitmap. + * Both dest and origin are in window coordinates, however, origin + * may lie outside of the display. + * stride - The width of the full source image in pixels. + * + * Return: + * OK on success; ERROR on failure with errno set appropriately + * + ****************************************************************************/ + +void nxbe_bitmap(FAR struct nxbe_window_s *wnd, FAR const struct nxgl_rect_s *dest, + FAR const void *src[CONFIG_NX_NPLANES], + FAR const struct nxgl_point_s *origin, unsigned int stride) +{ + struct nx_bitmap_s info; + struct nxgl_rect_s bounds; + struct nxgl_point_s offset; + struct nxgl_rect_s remaining; + unsigned int deststride; + int i; + +#ifdef CONFIG_DEBUG + if (!wnd || !dest || !src || !origin) + { + return; + } +#endif + + /* Verify that the destination rectangle begins "below" and to the "right" + * of the origin + */ + + if (dest->pt1.x < origin->x || dest->pt1.y < origin->y) + { + gdbg("Bad dest start position\n"); + return; + } + + /* Verify that the width of the destination rectangle does not exceed the + * width of the source bitmap data (taking into account the bitmap origin) + */ + + deststride = (((dest->pt2.x - origin->x + 1) * wnd->be->plane[0].pinfo.bpp + 7) >> 3); + if (deststride > stride) + { + gdbg("Bad dest width\n"); + return; + } + + /* Offset the rectangle and image origin by the window origin */ + + nxgl_rectoffset(&bounds, dest, wnd->bounds.pt1.x, wnd->bounds.pt1.y); + nxgl_vectoradd(&offset, origin, &wnd->bounds.pt1); + + /* Clip to the limits of the window and of the background screen */ + + nxgl_rectintersect(&remaining, &bounds, &wnd->bounds); + nxgl_rectintersect(&remaining, &remaining, &wnd->be->bkgd.bounds); + if (nxgl_nullrect(&remaining)) + { + return; + } + + /* Then perform the clipped fill */ + +#if CONFIG_NX_NPLANES > 1 + for (i = 0; i < wnd->be->vinfo.nplanes; i++) +#else + i = 0; +#endif + { + info.cops.visible = nxs_clipcopy; + info.cops.obscured = nxbe_clipnull; + info.src = src[i]; + info.origin.x = offset.x; + info.origin.y = offset.y; + info.stride = stride; + + nxbe_clipper(wnd->above, &remaining, NX_CLIPORDER_DEFAULT, + &info.cops, &wnd->be->plane[i]); + } +} + |