Subversion Repositories shark

/*

 * Project: S.Ha.R.K.

 *

 * Coordinators:

 *   Giorgio Buttazzo    <giorgio@sssup.it>

 *   Paolo Gai           <pj@gandalf.sssup.it>

 *

 * Authors     :

 *   Paolo Gai           <pj@gandalf.sssup.it>

 *   Massimiliano Giorgi <massy@gandalf.sssup.it>

 *   Luca Abeni          <luca@gandalf.sssup.it>

 *   (see the web pages for full authors list)

 *

 * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)

 *

 * http://www.sssup.it

 * http://retis.sssup.it

 * http://shark.sssup.it

 */

/*

 * Copyright (C) 2000 Paolo Gai

 *

 * 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

 *

 */

/*---------------*

 * GRX Management*

 *---------------*/

#include <kernel/kern.h>

//#include <drivers/glib.h>

#include "../include/drivers/shark_input26.h"

#include "../include/drivers/shark_mouse26.h"

/* External functions */

extern void grx_getimage(WORD x1, WORD y1, WORD x2, WORD y2, BYTE *buf);

extern void grx_putimage(WORD x1, WORD y1, WORD x2, WORD y2, BYTE *buf);

extern int _mouse_cursor_init(int cmd, void(*my_show_cursor)(int, int), void(*my_restore_cursor)(int, int));

extern void _mouse_cursor_getposition(int *xptr, int *yptr);

extern int autocursormode;

static BYTE left_ptr_bits[] = { 0x00, 0x00, 0x08, 0x00, 0x18, 0x00, 0x38, 0x00,

				0x78, 0x00, 0xf8, 0x00, 0xf8, 0x01, 0xf8, 0x03,

				0xf8, 0x07, 0xf8, 0x00, 0xd8, 0x00, 0x88, 0x01,

				0x80, 0x01, 0x00, 0x03, 0x00, 0x03, 0x00, 0x00 };

static BYTE left_ptrmsk_bits[] = { 0x0c, 0x00, 0x1c, 0x00, 0x3c, 0x00, 0x7c, 0x00,

				   0xfc, 0x00, 0xfc, 0x01, 0xfc, 0x03, 0xfc, 0x07,

				   0xfc, 0x0f, 0xfc, 0x0f, 0xfc, 0x01, 0xdc, 0x03,

				   0xcc, 0x03, 0x80, 0x07, 0x80, 0x07, 0x00, 0x03 };

/* dimensions (16x16) */

#define SHAPE_DX MOUSESHAPEDX

#define SHAPE_DY MOUSESHAPEDY

/* shape hot spot (3,1) */

#define HOTSPOT_X MOUSEHOTSPOTX

#define HOTSPOT_Y MOUSEHOTSPOTY

/* cursor shape */

static BYTE shape[SHAPE_DX * SHAPE_DY * 4];

/* cursor mask */

static BYTE mask[SHAPE_DX * SHAPE_DY * 4];

/* old memory buffer */

static BYTE saved_shape[SHAPE_DX * SHAPE_DY * 4];

/* new memory buffer */

static BYTE new_shape[SHAPE_DX * SHAPE_DY * 4];

static BYTE *saved_shapeptr = (void*)DEFAULT;

static BYTE *saved_maskptr = (void*)DEFAULT;

static int bpp; // bytes per pixel

/* if called with NULL -> retrieve next bit of a bits-stream

 * else                -> initialize the bit stream

 */

static int get_bit(BYTE *p)

{

	static BYTE *ptr;

	static BYTE val;

	static int  c;

	if (p != NULL) {

		ptr = p;

		val = 0;

		c = 8;

		return 0;

	}

	if (c==8) {

		c = 0;

		val = *ptr;

		ptr++;

	} else

		val >>= 1;

	c++;

	return val&1;

}

/* show grx cursor */

static void show_grx_cursor(int x, int y)

{

	int i;

	x -= HOTSPOT_X - 1;

	y -= HOTSPOT_Y - 1;

	grx_getimage(x, y, x+SHAPE_DX-1, y+SHAPE_DY-1, saved_shape);

	for(i=0; i < SHAPE_DX*SHAPE_DY*bpp/4; i++)

		((DWORD*)new_shape)[i] = ( ((DWORD*)saved_shape)[i] & ((DWORD*)mask)[i] ) | ((DWORD*)shape)[i];

	grx_putimage(x, y, x+SHAPE_DX-1, y+SHAPE_DY-1, new_shape);

}

/* restore grx cursor */

static void restore_grx_cursor(int x, int y)

{

	x -= HOTSPOT_X - 1;

	y -= HOTSPOT_Y - 1;

	grx_putimage(x, y, x+SHAPE_DX-1, y+SHAPE_DY-1, saved_shape);

}

int mouse_grxcursor(int cmd, int bpp)

{

	mouse_grxshape(saved_shapeptr, saved_maskptr, bpp);

	return _mouse_cursor_init(cmd|GRXCURSOR, show_grx_cursor, restore_grx_cursor);

}

/* compute the shape and mask array */

int mouse_grxshape(BYTE *shapeptr, BYTE *maskptr, int bpp_in)

{

	BYTE b;

	int  pc;

	int  i,j;

	int  saved_x, saved_y;

	int  cond;

	/*int  result;

	grx_vga_modeinfo info;*/

	/* Autocalculate bpp */

	/*result = gd_getmodeinfo(&info);

	if (result == -1)

		return -1;

	bpp = info.bytesperpixel;*/

	cond = ( ((autocursormode & STATUSMASK) == ENABLE) && ((autocursormode & GRXCURSOR) == GRXCURSOR) );

	if (cond) {

		_mouse_cursor_getposition(&saved_x,&saved_y);

		restore_grx_cursor(saved_x,saved_y);

	}

	if (bpp_in != -1)

		bpp = bpp_in;

	if (shapeptr == (void*)DEFAULT) {

		shapeptr = left_ptr_bits;

		pc = 0;

		get_bit(left_ptr_bits);

		for (i = 0; i < SHAPE_DX*SHAPE_DY; i++) {

			b = get_bit(NULL) ? 255 : 0;

			for (j = 0; j < bpp; j++)

				shape[pc++] = b;

		}

	} else {

		memcpy(shape, shapeptr, SHAPE_DX*SHAPE_DY*bpp);

		saved_shapeptr = shapeptr;

	}

	if (maskptr == (void*)DEFAULT) {

		maskptr = left_ptrmsk_bits;

		pc = 0;

		get_bit(left_ptrmsk_bits);

		for (i = 0; i < SHAPE_DX*SHAPE_DY; i++) {

			b=get_bit(NULL)?0:255;

			for (j = 0; j < bpp; j++)

				mask[pc++] = b;

		}

	} else {

		memcpy(mask, maskptr, SHAPE_DX*SHAPE_DY*bpp);

		saved_maskptr = maskptr;

	}

	if (cond)

		show_grx_cursor(saved_x,saved_y);

	return 0;

}