mmsfb_drawline_argb.cpp

00001 /***************************************************************************
00002  *   Copyright (C) 2005-2007 Stefan Schwarzer, Jens Schneider,             *
00003  *                           Matthias Hardt, Guido Madaus                  *
00004  *                                                                         *
00005  *   Copyright (C) 2007-2008 BerLinux Solutions GbR                        *
00006  *                           Stefan Schwarzer & Guido Madaus               *
00007  *                                                                         *
00008  *   Copyright (C) 2009-2013 BerLinux Solutions GmbH                       *
00009  *                                                                         *
00010  *   Authors:                                                              *
00011  *      Stefan Schwarzer   <stefan.schwarzer@diskohq.org>,                 *
00012  *      Matthias Hardt     <matthias.hardt@diskohq.org>,                   *
00013  *      Jens Schneider     <jens.schneider@diskohq.org>,                   *
00014  *      Guido Madaus       <guido.madaus@diskohq.org>,                     *
00015  *      Patrick Helterhoff <patrick.helterhoff@diskohq.org>,               *
00016  *      René Bählkow       <rene.baehlkow@diskohq.org>                     *
00017  *                                                                         *
00018  *   This library is free software; you can redistribute it and/or         *
00019  *   modify it under the terms of the GNU Lesser General Public            *
00020  *   License version 2.1 as published by the Free Software Foundation.     *
00021  *                                                                         *
00022  *   This library is distributed in the hope that it will be useful,       *
00023  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
00024  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *
00025  *   Lesser General Public License for more details.                       *
00026  *                                                                         *
00027  *   You should have received a copy of the GNU Lesser General Public      *
00028  *   License along with this library; if not, write to the                 *
00029  *   Free Software Foundation, Inc.,                                       *
00030  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
00031  **************************************************************************/
00032 
00033 #include "mmsgui/fb/mmsfbconv.h"
00034 #include "mmstools/mmstools.h"
00035 
00036 void mmsfb_drawline_argb(MMSFBSurfacePlanes *dst_planes, int dst_height,
00037                          MMSFBRegion &clipreg, int x1, int y1, int x2, int y2, MMSFBColor &color) {
00038     // first time?
00039     static bool firsttime = true;
00040     if (firsttime) {
00041         printf("DISKO: Using accelerated draw line to ARGB.\n");
00042         firsttime = false;
00043     }
00044 
00045     // get the first destination ptr/pitch
00046     unsigned int *dst = (unsigned int *)dst_planes->ptr;
00047     int dst_pitch = dst_planes->pitch;
00048 
00049     // prepare...
00050     int dst_pitch_pix = dst_pitch >> 2;
00051 
00052     // prepare the color
00053     register unsigned int A = color.a;
00054     register unsigned int SRC;
00055     SRC =     (A << 24)
00056             | (color.r << 16)
00057             | (color.g << 8)
00058             | color.b;
00059 
00060     // draw a line with Bresenham-Algorithm
00061     MMSFB_DRAWLINE_BRESENHAM(MMSFB_DRAWLINE_PUT_PIXEL);
00062 }
00063