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/*

 * Copyright (c) 2000 Greg Haerr <greg@censoft.com>

 *

 * Screen Driver Utilities

 *

 * Microwindows framebuffer selection routines

 * Including this file will drag in all fblinX framebuffer subdrivers

 * When a new framebuffer subdriver is written, it should be referenced

 * here in select_fb_driver.

 */

#include <assert.h>

#include <stdio.h>

#include <stdlib.h>

#include "device.h"

#include "genmem.h"

#include "fb.h"

/* select a framebuffer subdriver based on planes and bpp*/

/* modify this procedure to add a new framebuffer subdriver*/

PSUBDRIVER

select_fb_subdriver(PSD psd)

{

        PSUBDRIVER  driver = NULL;

        extern SUBDRIVER fblinear1;

        extern SUBDRIVER fblinear2;

        extern SUBDRIVER fblinear4;

        extern SUBDRIVER fblinear8;

        extern SUBDRIVER fblinear16;

        extern SUBDRIVER fblinear24;

        extern SUBDRIVER fblinear32;

#if FBVGA

        extern SUBDRIVER vgaplan4;

        extern SUBDRIVER memplan4;

        /* FB_TYPE_VGA_PLANES*/

        if(psd->planes == 4 && psd->bpp == 4) {

                if(psd->flags & PSF_MEMORY)

                        driver = &memplan4;

                else driver = &vgaplan4;

        }

#endif

        /* FB_TYPE_PACKED_PIXELS*/

        /* device and memory drivers are the same for packed pixels*/

        if(psd->planes == 1) {

                switch(psd->bpp) {

                case 1:

                        driver = &fblinear1;

                        break;

                case 2:

                        driver = &fblinear2;

                        break;

                case 4:

                        driver = &fblinear4;

                        break;

                case 8:

                        driver = &fblinear8;

                        break;

                case 16:

                        driver = &fblinear16;

                        break;

                case 24:

                        driver = &fblinear24;

                        break;

                case 32:

                        driver = &fblinear32;

                        break;

                }

        }

        /* return driver selected*/

        return driver;

}

/*

 * Initialize memory device with passed parms,

 * select suitable framebuffer subdriver,

 * and set subdriver in memory device.

 */

MWBOOL

fb_mapmemgc(PSD mempsd,MWCOORD w,MWCOORD h,int planes,int bpp,int linelen,

        int size,void *addr)

{

        PSUBDRIVER subdriver;

        /* initialize mem screen driver*/

        initmemgc(mempsd, w, h, planes, bpp, linelen, size, addr);

/* FIXME kluge for current portrait mode subdriver in scr_fbportrait.c*/

//if(mempsd->portrait != MWPORTRAIT_NONE) return 1;

        /* select a framebuffer subdriver based on planes and bpp*/

        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;

}