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/*

 * Copyright (c) 2000, 2001 Greg Haerr <greg@censoft.com>

 *

 * Screen Driver Utilities

 *

 * Microwindows memory device routines

 */

#include <assert.h>

#include <stdio.h>

#include <stdlib.h>

#include "device.h"

#include "fb.h"

#include "genmem.h"

/* allocate a memory screen device*/

PSD

gen_allocatememgc(PSD psd)

{

        PSD     mempsd;

        /* if driver doesn't have blit, fail*/

        if((psd->flags & PSF_HAVEBLIT) == 0)

                return NULL;

        mempsd = malloc(sizeof(SCREENDEVICE));

        if (!mempsd)

                return NULL;

        /* copy passed device get initial values*/

        *mempsd = *psd;

        /* initialize*/

        mempsd->flags |= PSF_MEMORY;

        mempsd->flags &= ~PSF_SCREEN;

        mempsd->addr = NULL;

        return mempsd;

}

/* initialize memory device with passed parms*/

void

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

        int size,void *addr)

{

        assert(mempsd->flags & PSF_MEMORY);

        /* create mem psd w/h aligned with hw screen w/h*/

        if (mempsd->portrait & (MWPORTRAIT_LEFT|MWPORTRAIT_RIGHT)) {

                mempsd->yres = w;

                mempsd->xres = h;

        } else {

                mempsd->xres = w;

                mempsd->yres = h;

        }

        mempsd->xvirtres = w;

        mempsd->yvirtres = h;

        mempsd->planes = planes;

        mempsd->bpp = bpp;

        mempsd->linelen = linelen;

        mempsd->size = size;

        mempsd->addr = addr;

}

void

gen_freememgc(PSD mempsd)

{

        assert(mempsd->flags & PSF_MEMORY);

        /* note: mempsd->addr must be freed elsewhere*/

        free(mempsd);

}

void

gen_fillrect(PSD psd,MWCOORD x1, MWCOORD y1, MWCOORD x2, MWCOORD y2,

        MWPIXELVAL c)

{

        while(y1 <= y2)

                psd->DrawHorzLine(psd, x1, x2, y1++, c);

}

/*

 * Set subdriver entry points in screen device

 * Initialize subdriver if init flag is TRUE

 * Return 0 on fail

 */

MWBOOL

set_subdriver(PSD psd, PSUBDRIVER subdriver, MWBOOL init)

{

        /* set subdriver entry points in screen driver*/

        psd->DrawPixel          = subdriver->DrawPixel;

        psd->ReadPixel          = subdriver->ReadPixel;

        psd->DrawHorzLine       = subdriver->DrawHorzLine;

        psd->DrawVertLine       = subdriver->DrawVertLine;

        psd->FillRect           = subdriver->FillRect;

        psd->Blit               = subdriver->Blit;

        psd->DrawArea           = subdriver->DrawArea;

        psd->StretchBlit        = subdriver->StretchBlit;

        /* 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->DrawHorzLine         = psd->DrawHorzLine;

        subdriver->DrawVertLine         = psd->DrawVertLine;

        subdriver->FillRect             = psd->FillRect;

        subdriver->Blit                 = psd->Blit;

        subdriver->DrawArea             = psd->DrawArea;

        subdriver->StretchBlit          = psd->StretchBlit;

}