1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 /*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Grayscale framework * gray_scroll_down8() function * * This is a generic framework to use grayscale display within Rockbox * plugins. It obviously does not work for the player. * * Copyright (C) 2004 Jens Arnold * * All files in this archive are subject to the GNU General Public License. * See the file COPYING in the source tree root for full license agreement. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #ifndef SIMULATOR /* not for simulator by now */ #include "plugin.h" #ifdef HAVE_LCD_BITMAP /* and also not for the Player */ #include "gray.h" /*--------------------------------------------------------------------------- Scroll the whole grayscale buffer down by 8 pixels ---------------------------------------------------------------------------- black_border determines if the pixels scrolled in at the top are black or white Scrolling up/down by 8 pixels is very fast. */ void gray_scroll_down8(bool black_border) { int by, d; unsigned filler; unsigned char *ptr; filler = black_border ? 0xFF : 0; /* Scroll row by row to minimize flicker (byte rows = 8 pixels each) */ for (by = _graybuf->bheight - 1; by > 0; by--) { ptr = _graybuf->data + MULU16(_graybuf->width, by); for (d = 0; d < _graybuf->depth; d++) { _gray_rb->memcpy(ptr, ptr - _graybuf->width, _graybuf->width); ptr += _graybuf->plane_size; } } /* fill first row */ ptr = _graybuf->data; for (d = 0; d < _graybuf->depth; d++) { _gray_rb->memset(ptr, filler, _graybuf->width); ptr += _graybuf->plane_size; } } #endif // #ifdef HAVE_LCD_BITMAP #endif // #ifndef SIMULATOR
