WebSVN - shark - Blame - Rev 1689 - /shark/trunk/drivers/grx/drawfun/fun8.c

Rev	Author	Line No.	Line
1063	tullio	1
		2	/*
		3	* This program is free software; you can redistribute it and/or modify
		4	* it under the terms of the GNU General Public License as published by
		5	* the Free Software Foundation; either version 2 of the License, or
		6	* (at your option) any later version.
		7	*
		8	* This program is distributed in the hope that it will be useful,
		9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
		10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		11	* GNU General Public License for more details.
		12	*
		13	* You should have received a copy of the GNU General Public License
		14	* along with this program; if not, write to the Free Software
		15	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
		16	*
		17	*/
		18
2	pj	19	#include <ll/i386/hw-data.h>
		20	#include <ll/i386/hw-instr.h>
		21	#include <ll/i386/mem.h>
1689	fabio	22	#include <arch/stdlib.h>
2	pj	23
		24	#include <drivers/gd.h>
		25
151	giacomo	26	#include "font.h"
2	pj	27	#include "fun8.h"
		28
		29	#define fontaddr 0xffa6eL /* indirizzo set caratteri */
		30	extern DWORD flbaddr;
		31
		32	void RdWin_256(WORD x1, WORD y1, WORD x2, WORD y2, BYTE *buf)
		33	{
		34	WORD b_bank, b_offset, display_ptr;
		35	int dx, len1, len2, bank_num, row, sx[12];
		36	/* int bank, enmem;*/
		37	DWORD end_of_line, display_offset;
		38	WORD bytes_per_row;
		39	LIN_ADDR p;
		40
		41	bytes_per_row = gd_getbpr();
		42	p = buf;
		43
		44	if (bytes_per_row == 1024) {
		45	/* ClrWin_1024(x1,y1,x2,y2,color);*/
		46	Seg_Off_256(x1, y1, bytes_per_row, &b_offset, &b_bank);
		47	dx = (x2 - x1) + 1;
		48	display_offset = b_offset;
		49	bank_num = b_bank;
		50	Load_Write_Bank_256(bank_num);
		51	row = y1;
		52	do {
		53	display_ptr = display_offset;
		54	/* Clr_Part(color, dx, display_ptr);*/
		55	memcpy(p, (LIN_ADDR)(0xA0000 + display_ptr), dx);
		56	p += dx;
		57	display_offset += bytes_per_row;
		58	if (display_offset >= 65536L) {
		59	bank_num++;
		60	Load_Write_Bank_256(bank_num);
		61	display_offset = x1;
		62	}
		63	row++;
		64	} while (row <= y2);
		65	Load_Write_Bank_256(0);
		66	} else {
		67	if (bytes_per_row == 640) {
		68	sx[0] = 0;
		69	sx[1] = 256;
		70	sx[2] = 512;
		71	sx[3] = 128;
		72	sx[4] = 384;
		73	sx[5] = 0;
		74	}
		75	if (bytes_per_row == 800) {
		76	sx[0] = 0;
		77	sx[1] = 736;
		78	sx[2] = 672;
		79	sx[3] = 608;
		80	sx[4] = 544;
		81	sx[5] = 480;
		82	sx[6] = 416;
		83	sx[7] = 352;
		84	}
		85	Seg_Off_256(x1, y1, bytes_per_row, &b_offset, &b_bank);
		86	dx = (x2 - x1) + 1;
		87	row = y1;
		88	display_offset = b_offset;
		89	display_ptr = display_offset;
		90	bank_num = b_bank;
		91	Load_Write_Bank_256(bank_num);
		92	do {
		93	end_of_line = display_ptr + (x2 - x1);
		94	if (end_of_line > 65536L) {
		95	len2 = (1 + end_of_line - 65536L);
		96	len1 = dx - len2;
		97	/* Clr_Part(color, length_1, display_ptr);*/
		98	memcpy(p, (LIN_ADDR)(0xA0000 + display_ptr), len1);
		99	p += len1;
		100	bank_num++;
		101	Load_Write_Bank_256(bank_num);
		102	display_ptr = 0;
		103	/* Clr_Part(color, length_2, display_ptr);*/
		104	memcpy(p, (LIN_ADDR)(0xA0000 + display_ptr), len2);
		105	p += len2;
		106	display_ptr = bytes_per_row - len1;
		107	} else {
		108	/* Clr_Part(color, dx, display_ptr);*/
		109	memcpy(p, (LIN_ADDR)(0xA0000 + display_ptr), dx);
		110	p += dx;
		111	display_offset = display_ptr + bytes_per_row;
		112	if (display_offset > 65536L) {
		113	bank_num++;
		114	Load_Write_Bank_256(bank_num);
		115	if (sx[bank_num] <= x1) {
		116	display_ptr = x1 - sx[bank_num];
		117	} else {
		118	display_ptr = x1 + (bytes_per_row - sx[bank_num]);
		119	}
		120	} else {
		121	display_ptr += bytes_per_row;
		122	}
		123	}
		124	row++;
		125	} while (row <= y2);
		126	Load_Write_Bank_256(0);
		127	}
		128	}
		129
		130	void WrWin_256(WORD x1, WORD y1, WORD x2, WORD y2, BYTE *buf)
		131	{
		132	WORD b_bank, b_offset, display_ptr;
		133	int dx, len1, len2, bank_num, row, sx[12];
		134	/* int bank, enmem;*/
		135	DWORD end_of_line, display_offset;
		136	WORD bytes_per_row;
		137	LIN_ADDR p;
		138
		139	bytes_per_row = gd_getbpr();
		140	p = buf;
		141
		142	if (bytes_per_row == 1024) {
		143	/* ClrWin_1024(x1,y1,x2,y2,color);*/
		144	Seg_Off_256(x1, y1, bytes_per_row, &b_offset, &b_bank);
		145	//dx = (x2 - x1);
		146	dx = (x2 - x1 + 1);
		147	display_offset = b_offset;
		148	bank_num = b_bank;
		149	Load_Write_Bank_256(bank_num);
		150	row = y1;
		151	do {
		152	display_ptr = display_offset;
		153	/* Clr_Part(color, dx, display_ptr);*/
		154	memcpy((LIN_ADDR)(0xA0000 + display_ptr), p, dx);
		155	p += dx;
		156	display_offset += bytes_per_row;
		157	if (display_offset >= 65536L) {
		158	bank_num++;
		159	Load_Write_Bank_256(bank_num);
		160	display_offset = x1;
		161	}
		162	row++;
		163	} while (row <= y2);
		164	Load_Write_Bank_256(0);
		165	} else {
		166	if (bytes_per_row == 640) {
		167	sx[0] = 0;
		168	sx[1] = 256;
		169	sx[2] = 512;
		170	sx[3] = 128;
		171	sx[4] = 384;
		172	sx[5] = 0;
		173	}
		174	if (bytes_per_row == 800) {
		175	sx[0] = 0;
		176	sx[1] = 736;
		177	sx[2] = 672;
		178	sx[3] = 608;
		179	sx[4] = 544;
		180	sx[5] = 480;
		181	sx[6] = 416;
		182	sx[7] = 352;
		183	}
		184	Seg_Off_256(x1, y1, bytes_per_row, &b_offset, &b_bank);
		185	dx = (x2 - x1 + 1);
		186	row = y1;
		187	display_offset = b_offset;
		188	display_ptr = display_offset;
		189	bank_num = b_bank;
		190	Load_Write_Bank_256(bank_num);
		191	do {
		192	end_of_line = display_ptr + (x2 - x1);
		193	// if (end_of_line >= 65536L) {
		194	if (end_of_line > 65536L) {
		195	len2 = (1 + end_of_line - 65536L);
		196	len1 = dx - len2;
		197	/* Clr_Part(color, length_1, display_ptr);*/
		198	memcpy((LIN_ADDR)(0xA0000 + display_ptr), p, len1);
		199	p += len1;
		200	bank_num++;
		201	Load_Write_Bank_256(bank_num);
		202	display_ptr = 0;
		203	/* Clr_Part(color, length_2, display_ptr);*/
		204	memcpy((LIN_ADDR)(0xA0000 + display_ptr), p, len2);
		205	p += len2;
		206	display_ptr = bytes_per_row - len1;
		207	} else {
		208	/* Clr_Part(color, dx, display_ptr);*/
		209	memcpy((LIN_ADDR)(0xA0000 + display_ptr), p, dx);
		210	p += dx;
		211	display_offset = display_ptr + bytes_per_row;
		212	if (display_offset > 65536L) {
		213	//if (display_offset >= 65536L) {
		214	bank_num++;
		215	Load_Write_Bank_256(bank_num);
		216	if (sx[bank_num] <= x1) {
		217	display_ptr = x1 - sx[bank_num];
		218	} else {
		219	display_ptr = x1 + (bytes_per_row - sx[bank_num]);
		220	}
		221	} else {
		222	display_ptr += bytes_per_row;
		223	}
		224	}
		225	row++;
		226	} while (row <= y2);
		227	Load_Write_Bank_256(0);
		228	}
		229	}
		230
		231	void linGet8(WORD x1, WORD y1, WORD x2, WORD y2, BYTE *buf)
		232	{
		233	WORD bpr;
		234	LIN_ADDR addr, p;
		235	WORD dx, y;
		236
		237	bpr = gd_getbpr();
		238	p = buf;
		239	addr = (void )(flbaddr + x1 + bpr y1);
		240	//dx = x2 - x1;
		241	dx = x2 - x1 +1;
		242
		243	for (y = y1; y <= y2; y++) {
		244	memcpy(p, addr, dx);
		245	p += dx;
		246	addr += bpr;
		247	}
		248	}
		249
		250	void linPut8(WORD x1, WORD y1, WORD x2, WORD y2, BYTE *buf)
		251	{
		252	WORD bpr;
		253	LIN_ADDR addr, p;
		254	WORD dx, y;
		255
		256	bpr = gd_getbpr();
		257	p = buf;
		258	addr = (void )(flbaddr + x1 + bpr y1);
		259	dx = x2 - x1 +1;
		260
		261	for (y = y1; y <= y2; y++) {
		262	memcpy(addr, p, dx);
		263	p += dx;
		264	addr += bpr;
		265	}
		266	}
		267
		268	void ClrWin_256(WORD x1, WORD y1, WORD x2, WORD y2, DWORD color)
		269	{
		270	WORD b_bank, b_offset, display_ptr;
		271	int dx, len1, len2, bank_num, row, sx[12];
		272	/* int bank, enmem;*/
		273	DWORD end_of_line, display_offset;
		274	WORD bytes_per_row;
		275
		276	bytes_per_row = gd_getbpr();
		277
		278	if (bytes_per_row == 1024) {
		279	/* ClrWin_1024(x1,y1,x2,y2,color);*/
		280	Seg_Off_256(x1, y1, bytes_per_row, &b_offset, &b_bank);
		281	dx = (x2 - x1) + 1;
		282	display_offset = b_offset;
		283	bank_num = b_bank;
		284	Load_Write_Bank_256(bank_num);
		285	row = y1;
		286	do {
		287	display_ptr = display_offset;
		288	/* Clr_Part(color, dx, display_ptr);*/
		289	memset((LIN_ADDR)(0xA0000 + display_ptr), color, dx);
		290	display_offset += bytes_per_row;
		291	if (display_offset >= 65536L) {
		292	bank_num++;
		293	Load_Write_Bank_256(bank_num);
		294	display_offset = x1;
		295	}
		296	row++;
		297	} while (row <= y2);
		298	Load_Write_Bank_256(0);
		299	} else {
		300	if (bytes_per_row == 640) {
		301	sx[0] = 0;
		302	sx[1] = 256;
		303	sx[2] = 512;
		304	sx[3] = 128;
		305	sx[4] = 384;
		306	sx[5] = 0;
		307	}
		308	if (bytes_per_row == 800) {
		309	sx[0] = 0;
		310	sx[1] = 736;
		311	sx[2] = 672;
		312	sx[3] = 608;
		313	sx[4] = 544;
		314	sx[5] = 480;
		315	sx[6] = 416;
		316	sx[7] = 352;
		317	}
		318	Seg_Off_256(x1, y1, bytes_per_row, &b_offset, &b_bank);
		319	dx = (x2 - x1) + 1;
		320	row = y1;
		321	display_offset = b_offset;
		322	display_ptr = display_offset;
		323	bank_num = b_bank;
		324	Load_Write_Bank_256(bank_num);
		325	do {
		326	end_of_line = display_ptr + (x2 - x1);
		327	if (end_of_line >= 65536L) {
		328	len2 = (1 + end_of_line - 65536L);
		329	len1 = dx - len2;
		330	/* Clr_Part(color, length_1, display_ptr);*/
		331	memset((LIN_ADDR)(0xA0000 + display_ptr), color, len1);
		332	bank_num++;
		333	Load_Write_Bank_256(bank_num);
		334	display_ptr = 0;
		335	/* Clr_Part(color, length_2, display_ptr);*/
		336	memset((LIN_ADDR)(0xA0000 + display_ptr), color, len2);
		337	display_ptr = bytes_per_row - len1;
		338	} else {
		339	/* Clr_Part(color, dx, display_ptr);*/
		340	memset((LIN_ADDR)(0xA0000 + display_ptr), color, dx);
		341	display_offset = display_ptr + bytes_per_row;
		342	if (display_offset >= 65536L) {
		343	bank_num++;
		344	Load_Write_Bank_256(bank_num);
		345	if (sx[bank_num] <= x1) {
		346	display_ptr = x1 - sx[bank_num];
		347	} else {
		348	display_ptr = x1 + (bytes_per_row - sx[bank_num]);
		349	}
		350	} else {
		351	display_ptr += bytes_per_row;
		352	}
		353	}
		354	row++;
		355	} while (row <= y2);
		356	Load_Write_Bank_256(0);
		357	}
		358	}
		359
		360	void linBox8(WORD x1, WORD y1, WORD x2, WORD y2, DWORD color)
		361	{
		362	WORD bpr;
		363	DWORD addr;
		364	WORD dx, y;
		365
		366	bpr = gd_getbpr();
		367	addr = flbaddr + x1 + bpr * y1;
		368	dx = x2 - x1 + 1;
		369
		370	for (y = y1; y <= y2; y++) {
		371	memset((LIN_ADDR)addr, color, dx);
		372	addr += bpr;
		373	}
		374	}
		375
		376	void WrRect_256(WORD x1, WORD y1, WORD x2, WORD y2, DWORD color)
		377	{
		378	WORD bank, offs, ebank, eoffs;
		379	WORD bpr;
		380	WORD line_segment, len;
		381	WORD y;
		382
		383	bpr = gd_getbpr();
		384	len = 1 + x2 - x1;
		385	Seg_Off_256(x2, y1, bpr, &eoffs, &ebank);
		386	Seg_Off_256(x1, y1, bpr, &offs, &bank);
		387	Load_Write_Bank_256(bank);
		388	if (bank == ebank) {
		389	memset((LIN_ADDR)(0xA0000 + offs), color, len);
		390	} else {
		391	line_segment = 65536L - offs;
		392	memset((LIN_ADDR)(0xA0000 + offs), color, line_segment);
		393	Load_Write_Bank_256(ebank);
		394	memset((LIN_ADDR)0xA0000, color, eoffs);
		395	}
		396	for (y = y1 + 1; y < y2 + 1; y++) {
		397	Seg_Off_256(x1, y, bpr, &offs, &bank);
		398	Load_Write_Bank_256(bank);
		399	lmempokeb((LIN_ADDR)(0xA0000 + offs), color);
		400	Seg_Off_256(x2, y, bpr, &offs, &bank);
		401	Load_Write_Bank_256(bank);
		402	lmempokeb((LIN_ADDR)(0xA0000 + offs), color);
		403	}
		404	Seg_Off_256(x2, y2, bpr, &eoffs, &ebank);
		405	Seg_Off_256(x1, y2, bpr, &offs, &bank);
		406	Load_Write_Bank_256(bank);
		407	if (bank == ebank) {
		408	memset((LIN_ADDR)(0xA0000 + offs), color, len);
		409	} else {
		410	line_segment = 65536L - offs;
		411	memset((LIN_ADDR)(0xA0000 + offs), color, line_segment);
		412	Load_Write_Bank_256(ebank);
		413	memset((LIN_ADDR)0xA0000, color, eoffs);
		414	}
		415	}
		416
		417	void linRect8(WORD x1, WORD y1, WORD x2, WORD y2, DWORD color)
		418	{
		419	WORD bpr;
		420	DWORD addr;
		421	WORD dx, y;
		422
		423	bpr = gd_getbpr();
		424	addr = flbaddr + x1 + bpr * y1;
		425	dx = x2 - x1;
		426
		427	memset((LIN_ADDR)addr, color, dx+1);
		428	addr += bpr;
		429
		430	for (y = y1 + 1; y <= y2 - 1; y++) {
		431	lmempokeb((LIN_ADDR)addr, color);
		432	lmempokeb((LIN_ADDR)(addr + dx), color);
		433	addr += bpr;
		434	}
		435	memset((LIN_ADDR)addr, color, dx+1);
		436	}
		437
		438	void WrText_256(char *text, WORD x, WORD y, DWORD fg, DWORD bg)
		439	{
		440	DWORD fp;
		441	WORD offs, bank;
		442	WORD bpr;
		443	int r, c, bits;
		444
		445	bpr = gd_getbpr();
		446	while (*text) {
151	giacomo	447	fp = (DWORD)&(font_table[(BYTE )text][0]);
2	pj	448	for (r=0; r<8; r++) {
		449	bits = lmempeekb((LIN_ADDR)(fp++));
		450	for (c=0; c<8; c++)
		451	if (bits & (0x80>>c)) {
		452	Seg_Off_256(x + c, y + r, bpr, &offs, &bank);
		453	Load_Write_Bank_256(bank);
		454	lmempokeb((LIN_ADDR)(0xA0000 + offs), fg);
		455	}
		456	/* lmempokeb((LIN_ADDR)(addr + (y + r) * bpr + x + c), fg);*/
		457	/* vbe_putpixel((x+c),(y+r),fg);*/
		458	else {
		459	Seg_Off_256(x + c, y + r, bpr, &offs, &bank);
		460	Load_Write_Bank_256(bank);
		461	lmempokeb((LIN_ADDR)(0xA0000 + offs), bg);
		462	}
		463	/* lmempokeb((LIN_ADDR)(addr + (y + r) * bpr + x + c), bg);*/
		464	/* vbe_putpixel((x+c), (y+r), bg);*/
		465	}
		466	text++;
		467	x += 8;
		468	}
		469	}
		470
		471	void linText8(char *text, WORD x, WORD y, DWORD fg, DWORD bg)
		472	{
		473	DWORD fp, addr;
		474	WORD bpr;
		475	int r, c, bits;
		476
		477	bpr = gd_getbpr();
		478	addr = gd_getflb();
		479	while (*text) {
		480	/DOSSetAddr(fp, (fontaddr + (8 (BYTE )text)));*/
		481	/DOSSetAddr(fp, (fontaddr + (8 (BYTE )text)));*/
151	giacomo	482	fp = (DWORD)&(font_table[(BYTE )text][0]);
2	pj	483	for (r=0; r<8; r++) {
		484	bits = lmempeekb((LIN_ADDR)fp++);
		485	for (c=0; c<8; c++)
		486	if (bits & (0x80>>c))
		487	lmempokeb((LIN_ADDR)(addr + (y + r) * bpr + x + c), fg);
		488	/* vbe_putpixel((x+c),(y+r),fg);*/
		489	else
		490	lmempokeb((LIN_ADDR)(addr + (y + r) * bpr + x + c), bg);
		491	/* vbe_putpixel((x+c), (y+r), bg);*/
		492	}
		493	text++;
		494	x += 8;
		495	}
		496	}
		497
		498	void WrLine_256(WORD x1, WORD y1, WORD x2, WORD y2, DWORD color)
		499	{
		500	int dx, dy, incr1, incr2, d, x, y, xend, yend, yinc, xinc;
		501	WORD bpr;
		502	WORD bank, offs, ebank, eoffs;
		503	WORD line_segment, len;
		504
		505	bpr = gd_getbpr();
		506	if (y2 == y1) {
		507	y = y1;
		508	if (x1 > x2) {
		509	xend = x1;
		510	x1 = x2;
		511	x2 = xend;
		512	}
		513	/* WrHline_256(x1, x2, y1, color, bpr); */
		514	len = 1 + x2 - x1;
		515	Seg_Off_256(x2, y, bpr, &eoffs, &ebank);
		516	Seg_Off_256(x1, y, bpr, &offs, &bank);
		517	Load_Write_Bank_256(bank);
		518	if (bank == ebank) {
		519	memset((LIN_ADDR)(0xA0000 + offs), color, len);
		520	} else {
		521	line_segment = 65536L - offs;
		522	memset((LIN_ADDR)(0xA0000 + offs), color, line_segment);
		523	Load_Write_Bank_256(ebank);
		524	memset((LIN_ADDR)0xA0000, color, eoffs);
		525	}
		526	} else {
		527	dx = abs(x2 - x1);
		528	dy = abs(y2 - y1);
		529	if (dx >= dy) {
		530	if (x1 > x2) {
		531	x = x2;
		532	y = y2;
		533	xend = x1;
		534	if (dy == 0) {
		535	yinc = 0;
		536	} else {
		537	if (y2 > y1) {
		538	yinc = -1;
		539	} else {
		540	yinc = 1;
		541	}
		542	}
		543	} else {
		544	x = x1;
		545	y = y1;
		546	xend = x2;
		547	if (dy == 0) {
		548	yinc = 0;
		549	} else {
		550	if (y2 > y1) {
		551	yinc =1;
		552	} else {
		553	yinc = -1;
		554	}
		555	}
		556	}
		557	incr1 = 2 * dy;
		558	d = incr1 - dx;
		559	incr2 = 2 * (dy - dx);
		560	Seg_Off_256(x, y, bpr, &offs, &bank);
		561	Load_Write_Bank_256(bank);
		562	lmempokeb((LIN_ADDR)(0xA0000 + offs), color);
		563	while (x < xend) {
		564	x++;
		565	if (d < 0) {
		566	d += incr1;
		567	} else {
		568	y += yinc;
		569	d += incr2;
		570	}
		571	Seg_Off_256(x, y, bpr, &offs, &bank);
		572	Load_Write_Bank_256(bank);
		573	lmempokeb((LIN_ADDR)(0xA0000 + offs), color);
		574	}
		575	} else {
		576	if (y1 > y2) {
		577	x = x2;
		578	y = y2;
		579	yend = y1;
		580	if (dx == 0) {
		581	xinc = 0;
		582	} else {
		583	if (x2 > x1) {
		584	xinc = -1;
		585	} else {
		586	xinc = 1;
		587	}
		588	}
		589	} else {
		590	x = x1;
		591	y = y1;
		592	yend = y2;
		593	if (dx == 0) {
		594	xinc = 0;
		595	} else {
		596	if (x2 > x1) {
		597	xinc = 1;
		598	} else {
		599	xinc = -1;
		600	}
		601	}
		602	}
		603	incr1 = 2 * dx;
		604	d = incr1 - dy;
		605	incr2 = 2 * (dx - dy);
		606	Seg_Off_256(x, y, bpr, &offs, &bank);
		607	Load_Write_Bank_256(bank);
		608	lmempokeb((LIN_ADDR)(0xA0000 + offs), color);
		609	while (y < yend) {
		610	y++;
		611	if (d < 0) {
		612	d += incr1;
		613	} else {
		614	x += xinc;
		615	d += incr2;
		616	}
		617	Seg_Off_256(x, y, bpr, &offs, &bank);
		618	Load_Write_Bank_256(bank);
		619	lmempokeb((LIN_ADDR)(0xA0000 + offs), color);
		620	}
		621	}
		622	}
		623	}
		624
		625	void linLine8(WORD x1, WORD y1, WORD x2, WORD y2, DWORD color)
		626	{
		627	register int t, distance;
		628	register DWORD addr;
		629	register WORD bpr;
		630	int xerr=0, yerr=0, deltax, deltay;
		631	int incx, incy;
		632
		633	bpr = gd_getbpr();
		634	addr = gd_getflb();
		635	deltax = x2 - x1; /* compute both distances */
		636	deltay = y2 - y1;
		637
		638	if (deltax > 0) /* compute increments */
		639	incx = 1;
		640	else if (deltax == 0)
		641	incx = 0;
		642	else
		643	incx = -1;
		644
		645	if (deltay > 0)
		646	incy = 1;
		647	else if (deltay == 0)
		648	incy = 0;
		649	else
		650	incy = -1;
		651
		652	deltax = abs(deltax); /* determine greater distance */
		653	deltay = abs(deltay);
		654	if (deltax > deltay)
		655	distance = deltax;
		656	else
		657	distance = deltay;
		658
		659	for (t=0; t<=distance+1; t++) { /* draw the line */
		660	/* vbe_putpixel(x1, y1, colour);*/
		661	lmempokeb((LIN_ADDR)(addr + y1 * bpr + x1), color);
		662	xerr += deltax;
		663	yerr += deltay;
		664	if (xerr > distance) {
		665	xerr -= distance;
		666	x1 += incx;
		667	}
		668	if (yerr > distance) {
		669	yerr -= distance;
		670	y1 += incy;
		671	}
		672	}
		673	}
		674
		675	void WrPixel_256(WORD x, WORD y, DWORD color)
		676	{
		677	WORD bpr;
		678	WORD bank, offs;
		679
		680	bpr = gd_getbpr();
		681	Seg_Off_256(x, y, bpr, &offs, &bank);
		682	Load_Write_Bank_256(bank);
		683	lmempokeb((LIN_ADDR)(0xA0000 + offs), color);
		684	/* Load_Write_Bank_256(0);*/
		685	}
		686
		687	void linWr8(WORD x, WORD y, DWORD color)
		688	{
		689	WORD bpr;
		690
		691	bpr = gd_getbpr();
		692	lmempokeb((LIN_ADDR)(flbaddr + y * bpr + x), color);
		693	}
		694
		695	DWORD RdPixel_256(WORD x, WORD y)
		696	{
		697	WORD bpr;
		698	WORD bank, offs;
		699	DWORD rv;
		700
		701	bpr = gd_getbpr();
		702	Seg_Off_256(x, y, bpr, &offs, &bank);
		703	Load_Write_Bank_256(bank);
		704	rv = lmempeekb((LIN_ADDR)(0xA0000 + offs));
		705	return rv;
		706	}
		707
		708	DWORD linRd8(WORD x, WORD y)
		709	{
		710	WORD bpr;
		711	DWORD rv;
		712
		713	bpr = gd_getbpr();
		714	rv = lmempeekb((LIN_ADDR)(flbaddr + y * bpr + x));
		715	return rv;
		716	}
		717

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(root)/shark/trunk/drivers/grx/drawfun/fun8.c @ 1506 - Rev 1689