Ejemplos de bitmap_paint_bits en C++ (Cpp)

Ejemplo n.º 1

Archivo: bitmap.c Proyecto: yourealwaysbe/zathura-dvi-mdvi

/* the general function to paint rows. Still used by the PK reader, but that
 * will change soon (The GF reader already uses bitmap_paint_bits()).
 */
void    bitmap_set_row(BITMAP *bm, int row, int col, int count, int state)
{
    BmUnit    *ptr;
    
    ptr = __bm_unit_ptr(bm, col, row);
    if(state)
        bitmap_paint_bits(ptr, col & (BITMAP_BITS-1), count);
    else
        bitmap_clear_bits(ptr, col & (BITMAP_BITS-1), count);
}

Ejemplo n.º 2

Archivo: gf.c Proyecto: 4eremuxa/evince

static int gf_read_bitmap(FILE *p, DviFontChar *ch)
{
	int	op;
	int	min_n, max_n;
	int	min_m, max_m;
	int	paint_switch;
	int	x, y;
	int	bpl;
	Int32	par;
	BmUnit	*line;
	BITMAP	*map;
	
	fseek(p, (long)ch->offset, SEEK_SET);
	op = fuget1(p);
	if(op == GF_BOC) {
		/* skip character code */
		fuget4(p);
		/* skip pointer */
		fuget4(p);
		min_m = fsget4(p);
		max_m = fsget4(p);
		min_n = fsget4(p);
		max_n = fsget4(p);
	} else if(op == GF_BOC1) {
		/* skip character code */
		fuget1(p);
		min_m = fuget1(p); /* this is max_m - min_m */
		max_m = fuget1(p);
		min_n = fuget1(p); /* this is max_n - min_n */
		max_n = fuget1(p); 
		min_m = max_m - min_m;
		min_n = max_n - min_n;
	} else {
		mdvi_error(_("GF: invalid opcode %d in character %d\n"),
			   op, ch->code);
		return -1;
	}

	ch->x = -min_m;
	ch->y = max_n;
	ch->width = max_m - min_m + 1;
	ch->height = max_n - min_n + 1;
	map = bitmap_alloc(ch->width, ch->height);

	ch->glyph.data = map;
	ch->glyph.x = ch->x;
	ch->glyph.y = ch->y;
	ch->glyph.w = ch->width;
	ch->glyph.h = ch->height;

#define COLOR(x)	((x) ? "BLACK" : "WHITE")

	paint_switch = WHITE;
	x = y = 0;
	line = map->data;
	bpl = map->stride;
	DEBUG((DBG_BITMAPS, "(gf) reading character %d\n", ch->code));
	while((op = fuget1(p)) != GF_EOC) {
		Int32	n;
		
		if(feof(p))
			break;
		if(op == GF_PAINT0) {
			DEBUG((DBG_BITMAPS, "(gf) Paint0 %s -> %s\n",
				COLOR(paint_switch), COLOR(!paint_switch)));	
			paint_switch = !paint_switch;
		} else if(op <= GF_PAINT3) {
			if(op < GF_PAINT1)
				par = op;
			else
				par = fugetn(p, op - GF_PAINT1 + 1);			
			if(y >= ch->height || x + par >= ch->width)
				goto toobig;
			/* paint everything between columns x and x + par - 1 */
			DEBUG((DBG_BITMAPS, "(gf) Paint %d %s from (%d,%d)\n",
				par, COLOR(paint_switch), x, y));
			if(paint_switch == BLACK)
				bitmap_paint_bits(line + (x / BITMAP_BITS),
					x % BITMAP_BITS, par);
			paint_switch = !paint_switch;
			x += par;
		} else if(op >= GF_NEW_ROW_0 && op <= GF_NEW_ROW_MAX) {
			y++; 
			line = bm_offset(line, bpl);
			x = op - GF_NEW_ROW_0;
			paint_switch = BLACK;
			DEBUG((DBG_BITMAPS, "(gf) new_row_%d\n", x));
		} else switch(op) {
			case GF_SKIP0:
				y++; 
				line = bm_offset(line, bpl);
				x = 0;
				paint_switch = WHITE;
				DEBUG((DBG_BITMAPS, "(gf) skip_0\n"));
				break;
			case GF_SKIP1:
			case GF_SKIP2:
			case GF_SKIP3:
				par = fugetn(p, op - GF_SKIP1 + 1);
				y += par + 1;
				line = bm_offset(line, (par + 1) * bpl);
				x = 0;
				paint_switch = WHITE;
				DEBUG((DBG_BITMAPS, "(gf) skip_%d\n", op - GF_SKIP1));
				break;
			case GF_XXX1:
			case GF_XXX2:
			case GF_XXX3:
			case GF_XXX4: {
#ifndef NODEBUG
				char	*s;

				s = read_string(p, op - GF_XXX1 + 1, NULL, 0);
				DEBUG((DBG_SPECIAL, "(gf) Character %d: Special \"%s\"\n",
					ch->code, s));
				mdvi_free(s);
#else
				n = fugetn(p, op - GF_XXX1 + 1);
				fseek(p, (long)n, SEEK_CUR);
#endif
				break;
			}
			case GF_YYY:
				n = fuget4(p);
				DEBUG((DBG_SPECIAL, "(gf) Character %d: MF special %u\n",
					ch->code, n));
				break;
			case GF_NOOP:
				DEBUG((DBG_BITMAPS, "(gf) no_op\n"));
				break;
			default:
				mdvi_error(_("(gf) Character %d: invalid opcode %d\n"),
					   ch->code, op);
				goto error;
		}
		/* chech that we're still inside the bitmap */
		if(x > ch->width || y > ch->height)
			goto toobig;
		DEBUG((DBG_BITMAPS, "(gf) curr_loc @ (%d,%d)\n", x, y));
	}

	if(op != GF_EOC)
		goto error;
	DEBUG((DBG_BITMAPS, "(gf) end of character %d\n", ch->code));
	return 0;

toobig:
	mdvi_error(_("(gf) character %d has an incorrect bounding box\n"),
		   ch->code);
error:
	bitmap_destroy(map);
	ch->glyph.data = NULL;
	return -1;
}