/* * Copyright (c) 1999-2001 Greg Haerr <greg@censoft.com> * * 1bpp Packed Linear Video Driver for Microwindows * * 	In this driver, psd->linelen is line byte length, not line pixel length *//*#define NDEBUG*/#include <assert.h>#include <string.h>#include "device.h"#include "fb.h"/* This file doesn't have full drawing mode functionality using * the applyOp() macro from fb.h */static unsigned char notmask[8] = {	0x7f, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, 0xfe};/* Calc linelen and mmap size, return 0 on fail*/static intlinear1_init(PSD psd){	if (!psd->size)		psd->size = psd->yres * psd->linelen;	/* linelen in bytes for bpp 1, 2, 4, 8 so no change*/	return 1;}/* Set pixel at x, y, to pixelval c*/static voidlinear1_drawpixel(PSD psd, MWCOORD x, MWCOORD y, MWPIXELVAL c){	ADDR8	addr = psd->addr;	assert (addr != 0);	assert (x >= 0 && x < psd->xres);	assert (y >= 0 && y < psd->yres);	assert (c < psd->ncolors);	DRAWON;	addr += (x>>3) + y * psd->linelen;	if(gr_mode == MWMODE_XOR)		*addr ^= c << (7-(x&7));	else		*addr = (*addr & notmask[x&7]) | (c << (7-(x&7)));	DRAWOFF;}/* Read pixel at x, y*/static MWPIXELVALlinear1_readpixel(PSD psd, MWCOORD x, MWCOORD y){	ADDR8	addr = psd->addr;	assert (addr != 0);	assert (x >= 0 && x < psd->xres);	assert (y >= 0 && y < psd->yres);	return (addr[(x>>3) + y * psd->linelen] >> (7-(x&7)) ) & 0x01;}/* Draw horizontal line from x1,y to x2,y including final point*/static voidlinear1_drawhorzline(PSD psd, MWCOORD x1, MWCOORD x2, MWCOORD y, MWPIXELVAL c){	ADDR8	addr = psd->addr;	assert (addr != 0);	assert (x1 >= 0 && x1 < psd->xres);	assert (x2 >= 0 && x2 < psd->xres);	assert (x2 >= x1);	assert (y >= 0 && y < psd->yres);	assert (c < psd->ncolors);	DRAWON;	addr += (x1>>3) + y * psd->linelen;	if(gr_mode == MWMODE_XOR) {		while(x1 <= x2) {			*addr ^= c << (7-(x1&7));			if((++x1 & 7) == 0)				++addr;		}	} else {		while(x1 <= x2) {			*addr = (*addr & notmask[x1&7]) | (c << (7-(x1&7)));			if((++x1 & 7) == 0)				++addr;		}	}	DRAWOFF;}/* Draw a vertical line from x,y1 to x,y2 including final point*/static voidlinear1_drawvertline(PSD psd, MWCOORD x, MWCOORD y1, MWCOORD y2, MWPIXELVAL c){	ADDR8	addr = psd->addr;	int	linelen = psd->linelen;	assert (addr != 0);	assert (x >= 0 && x < psd->xres);	assert (y1 >= 0 && y1 < psd->yres);	assert (y2 >= 0 && y2 < psd->yres);	assert (y2 >= y1);	assert (c < psd->ncolors);	DRAWON;	addr += (x>>3) + y1 * linelen;	if(gr_mode == MWMODE_XOR)		while(y1++ <= y2) {			*addr ^= c << (7-(x&7));			addr += linelen;		}	else		while(y1++ <= y2) {			*addr = (*addr & notmask[x&7]) | (c << (7-(x&7)));			addr += linelen;		}	DRAWOFF;}/* srccopy bitblt, opcode is currently ignored*/static voidlinear1_blit(PSD dstpsd, MWCOORD dstx, MWCOORD dsty, MWCOORD w, MWCOORD h,	PSD srcpsd, MWCOORD srcx, MWCOORD srcy, long op){	ADDR8	dst;	ADDR8	src;	int	i;	int	dlinelen = dstpsd->linelen;	int	slinelen = srcpsd->linelen;	assert (dstpsd->addr != 0);	assert (dstx >= 0 && dstx < dstpsd->xres);	assert (dsty >= 0 && dsty < dstpsd->yres);	assert (w > 0);	assert (h > 0);	assert (srcpsd->addr != 0);	assert (srcx >= 0 && srcx < srcpsd->xres);	assert (srcy >= 0 && srcy < srcpsd->yres);	assert (dstx+w <= dstpsd->xres);	assert (dsty+h <= dstpsd->yres);	assert (srcx+w <= srcpsd->xres);	assert (srcy+h <= srcpsd->yres);	DRAWON;	dst = dstpsd->addr + (dstx>>3) + dsty * dlinelen;	src = srcpsd->addr + (srcx>>3) + srcy * slinelen;	while(--h >= 0) {		ADDR8	d = dst;		ADDR8	s = src;		MWCOORD	dx = dstx;		MWCOORD	sx = srcx;		for(i=0; i<w; ++i) {			*d = (*d & notmask[dx&7]) |			   ((*s >> (7-(sx&7)) & 0x01) << (7-(dx&7)));			if((++dx & 7) == 0)				++d;			if((++sx & 7) == 0)				++s;		}		dst += dlinelen;		src += slinelen;	}	DRAWOFF;}SUBDRIVER fblinear1 = {	linear1_init,	linear1_drawpixel,	linear1_readpixel,	linear1_drawhorzline,	linear1_drawvertline,	gen_fillrect,	linear1_blit};