mmsfb_fillrectangle_rgb16.cpp

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/***************************************************************************
 *   Copyright (C) 2005-2007 Stefan Schwarzer, Jens Schneider,             *
 *                           Matthias Hardt, Guido Madaus                  *
 *                                                                         *
 *   Copyright (C) 2007-2008 BerLinux Solutions GbR                        *
 *                           Stefan Schwarzer & Guido Madaus               *
 *                                                                         *
 *   Copyright (C) 2009-2013 BerLinux Solutions GmbH                       *
 *                                                                         *
 *   Authors:                                                              *
 *      Stefan Schwarzer   <stefan.schwarzer@diskohq.org>,                 *
 *      Matthias Hardt     <matthias.hardt@diskohq.org>,                   *
 *      Jens Schneider     <jens.schneider@diskohq.org>,                   *
 *      Guido Madaus       <guido.madaus@diskohq.org>,                     *
 *      Patrick Helterhoff <patrick.helterhoff@diskohq.org>,               *
 *      René Bählkow       <rene.baehlkow@diskohq.org>                     *
 *                                                                         *
 *   This library is free software; you can redistribute it and/or         *
 *   modify it under the terms of the GNU Lesser General Public            *
 *   License version 2.1 as published by the Free Software Foundation.     *
 *                                                                         *
 *   This library is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *
 *   Lesser General Public License for more details.                       *
 *                                                                         *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with this library; if not, write to the                 *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
 **************************************************************************/

#include "mmsgui/fb/mmsfbconv.h"

#ifdef __HAVE_PF_RGB16__

#include "mmstools/mmstools.h"

void mmsfb_fillrectangle_rgb16(MMSFBSurfacePlanes *dst_planes, int dst_height,
                               int dx, int dy, int dw, int dh, MMSFBColor color) {
    // first time?
    static bool firsttime = true;
    if (firsttime) {
        printf("DISKO: Using accelerated fill rectangle to RGB16.\n");
        firsttime = false;
    }

    // get the first destination ptr/pitch
    unsigned short int *dst = (unsigned short int *)dst_planes->ptr;
    int dst_pitch = dst_planes->pitch;

    // prepare...
    int dst_pitch_pix = dst_pitch >> 1;
    dst+= dx + dy * dst_pitch_pix;

    unsigned short int *dst_end = dst + dst_pitch_pix * dh;
#ifndef __HAVE_SSE__
    int dst_pitch_diff = dst_pitch_pix - dw;
#endif

    // prepare the color
    register unsigned short int SRC;
    unsigned int r = color.r >> 3;
    unsigned int g = color.g >> 2;
    unsigned int b = color.b >> 3;
    SRC =     (r << 11)
            | (g << 5)
            | b;

    if ((SRC >> 8) != (SRC & 0xff)) {
        // different values for hi and lo byte
        // copy pixel directly to the destination
        // for all lines
        while (dst < dst_end) {
            // for all pixels in the line
#ifdef __HAVE_SSE__
            // fill memory 2-byte-wise (much faster than loop see below)
//      __asm__ __volatile__ ( "\trep stosw\n" : : "D" (dst), "a" (SRC), "c" (dw));
            short d0, d1, d2;
            __asm__ __volatile__ ( "\tcld\n\trep stosw" \
                    : "=&D" (d0), "=&a" (d1), "=&c" (d2) \
                    : "0" (dst), "1" (SRC), "2" (dw) \
                    : "memory", "cc");

            // go to the next line
            dst+= dst_pitch_pix;
#else
            unsigned short int *line_end = dst + dw;
            while (dst < line_end) {
                *dst = SRC;
                dst++;
            }

            // go to the next line
            dst+= dst_pitch_diff;
#endif
        }
    }
    else {
        // hi and lo byte are equal, so clear it with value from lo byte
        register int mw = dw << 1;
        register unsigned char lo = SRC & 0xff;
        if (mw != dst_pitch) {
            // for all lines
            while (dst < dst_end) {
                // reset all pixels in the line
                memset(dst, lo, mw);

                // go to the next line
                dst+= dst_pitch_pix;
            }
        }
        else {
            // clear one big block
            memset(dst, lo, (int)((char*)dst_end - (char*)dst));
        }
    }
}

#endif

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