/*** $Id: fb.c,v 1.12 2003/09/04 02:57:09 weiym Exp $** ** fb.c: Screen Driver Utilities**** Copyright (C) 2003 Feynman Software.** Copyright (C) 2000 Song Lixin and Wei Yongming.**** Portions from Greg Haerr's MicroWindows.** Copyright (c) 1999, 2000 Greg Haerr <greg@censoft.com>** ** Create Date: 2000/10/20 by Song Lixin.*//*** This program is free software; you can redistribute it and/or modify** it under the terms of the GNU General Public License as published by** the Free Software Foundation; either version 2 of the License, or** (at your option) any later version.**** This program 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 General Public License for more details.**** You should have received a copy of the GNU General Public License** along with this program; if not, write to the Free Software** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA*/#include <stdio.h>#include <stdlib.h>#include <linux/fb.h>#include "native.h"#include "fb.h"/* select a framebuffer subdriver based on planes and bpp *//* modify this procedure to add a new framebuffer subdriver */#ifdef _FBLIN1R_SUPPORTextern SUBDRIVER fblinear1;#endif#ifdef _FBLIN1L_SUPPORTextern SUBDRIVER fblinear_1;#endif#ifdef _FBLIN2R_SUPPORTextern SUBDRIVER fblinear2;#endif#ifdef _FBLIN2L_SUPPORTextern SUBDRIVER fblinear_2;#endif#ifdef _FBLIN4R_SUPPORTextern SUBDRIVER fblinear4;#endif#ifdef _FBLIN4L_SUPPORTextern SUBDRIVER fblinear_4;#endif#ifdef _FBLIN8_SUPPORTextern SUBDRIVER fblinear8;#endif#ifdef _FBLIN16_SUPPORTextern SUBDRIVER fblinear16;#endif#ifdef _FBLIN24_SUPPORTextern SUBDRIVER fblinear24;#endif#ifdef _FBLIN32_SUPPORTextern SUBDRIVER fblinear32;#endif#ifdef _FBVGA16_SUPPORTextern SUBDRIVER fbvga16;#endifPSUBDRIVER select_fb_subdriver (PSD psd){    PSUBDRIVER  driver = NULL;#ifdef _FBVGA16_SUPPORT    /* FB_TYPE_VGA_PLANES */    /* device and memory drivers are not same for vga16*/    if (psd->planes == 4 && psd->bpp == 4) {        driver = &fbvga16;    }#endif    /* FB_TYPE_PACKED_PIXELS */    /* device and memory drivers are the same for packed pixels*/    if (psd->planes == 1) {        switch (psd->bpp) {        case 1:            if (psd->flags & PSF_MSBRIGHT)#ifdef _FBLIN1R_SUPPORT                driver = &fblinear1;#else                driver = NULL;#endif            else#ifdef _FBLIN1L_SUPPORT                driver = &fblinear_1;#else                driver = NULL;#endif        break;        case 2:            if (psd->flags & PSF_MSBRIGHT)#ifdef _FBLIN2R_SUPPORT                driver = &fblinear2;#else                driver = NULL;#endif            else#ifdef _FBLIN2L_SUPPORT                driver = &fblinear_2;#else                driver = NULL;#endif        break;        case 4:            if (psd->flags & PSF_MSBRIGHT)#ifdef _FBLIN4R_SUPPORT                driver = &fblinear4;#else                driver = NULL;#endif            else#ifdef _FBLIN4L_SUPPORT                driver = &fblinear_4;#else                driver = NULL;#endif        break;#ifdef _FBLIN8_SUPPORT        case 8:            driver = &fblinear8;        break;#endif#ifdef _FBLIN16_SUPPORT        case 16:            driver = &fblinear16;        break;#endif#ifdef _FBLIN24_SUPPORT        case 24:            driver = &fblinear24;        break;#endif#ifdef _FBLIN32_SUPPORT        case 32:            driver = &fblinear32;        break;#endif        }    }#ifdef _DEBUG    printf ("PSD info: linelen %d xres %d yres %d\n", psd->linelen, psd->xres, psd->yres);#endif    /* return driver selected*/    return driver;}/*  * Initialize memory device with passed parms, * select suitable framebuffer subdriver, * and set subdriver in memory device. */int fb_mapmemgc (PSD mempsd,int w,int h,int planes,int bpp, int linelen,int size,void *addr){    PSUBDRIVER subdriver;    /* initialize mem screen driver */    native_gen_initmemgc (mempsd, w, h, planes, bpp, linelen, size, addr);    /* select the framebuffer subdriver */    subdriver = select_fb_subdriver (mempsd);    if(!subdriver)        return 0;    /* set and initialize subdriver into mem screen driver */    if (!set_subdriver (mempsd, subdriver, TRUE))        return 0;    return 1;}/* * Set subdriver entry points in screen device * Initialize subdriver if init flag is TRUE * Return 0 on fail */int set_subdriver(PSD psd, PSUBDRIVER subdriver, int init){    /* set subdriver entry points in screen driver*/    psd->DrawPixel  = subdriver->DrawPixel;    psd->ReadPixel  = subdriver->ReadPixel;    psd->DrawHLine  = subdriver->DrawHLine;    psd->DrawVLine  = subdriver->DrawVLine;    psd->Blit       = subdriver->Blit;    psd->PutBox     = subdriver->PutBox;    psd->GetBox     = subdriver->GetBox;    psd->PutBoxMask = subdriver->PutBoxMask;    psd->CopyBox    = subdriver->CopyBox;    /* call driver init procedure to calc map size and linelen*/    if (init && !subdriver->Init(psd))        return 0;    return 1;}/* fill in a subdriver struct from passed screen device*/void get_subdriver(PSD psd, PSUBDRIVER subdriver){    /* set subdriver entry points in screen driver*/    subdriver->DrawPixel  = psd->DrawPixel;    subdriver->ReadPixel  = psd->ReadPixel;    subdriver->DrawHLine  = psd->DrawHLine;    subdriver->DrawVLine  = psd->DrawVLine;    subdriver->Blit       = psd->Blit;    subdriver->PutBox     = psd->PutBox;    subdriver->GetBox     = psd->GetBox;    subdriver->PutBoxMask = psd->PutBoxMask;    subdriver->CopyBox    = psd->CopyBox;}