20 #define MSB_BIT_MASK(x) (BIT_MASK(x) << (8 - x))
52 	/** Number of pixels per tile, typically 8 */
74 	       (fptr->width * fptr->height / 8U);  in get_glyph_ptr()
81 		return glyph_ptr[x * (fptr->height / 8U) + y];  in get_glyph_byte()
92  * a byte is interpreted as 8 pixels ordered vertically among each other.
119 			 * by separating per 8-line boundaries.  in draw_char_vtmono()
123 			const size_t fb_index = (fb_y / 8U) * fb->x_res + fb_x;  in draw_char_vtmono()
124 			const size_t offset = y % 8;  in draw_char_vtmono()
125 			const uint8_t bottom_lines = ((offset + fptr->height) % 8);  in draw_char_vtmono()
143 				next_byte = get_glyph_byte(glyph_ptr, fptr, g_x, g_y / 8);  in draw_char_vtmono()
145 				byte = get_glyph_byte(glyph_ptr, fptr, g_x, g_y / 8);  in draw_char_vtmono()
146 				next_byte = get_glyph_byte(glyph_ptr, fptr, g_x, (g_y + 8) / 8);  in draw_char_vtmono()
151 				 * Extract the necessary 8 bits from the combined 2 tiles of glyphs.  in draw_char_vtmono()
153 				byte = ((byte << 8) | next_byte) >> (offset);  in draw_char_vtmono()
159 					bg_mask = BIT_MASK(8 - offset);  in draw_char_vtmono()
168 				byte = ((next_byte << 8) | byte) >> (8 - offset);  in draw_char_vtmono()
170 					bg_mask = BIT_MASK(8 - offset) << offset;  in draw_char_vtmono()
179 			if (((fptr->height - g_y) < 8) && (bottom_lines != 0)) {  in draw_char_vtmono()
200 				g_y += (8 - offset);  in draw_char_vtmono()
201 			} else if ((fptr->height - g_y) >= 8) {  in draw_char_vtmono()
202 				g_y += 8;  in draw_char_vtmono()
215 	const size_t index = ((y / 8) * fb->x_res);  in draw_point()
216 	uint8_t m = BIT(y % 8);  in draw_point()
275 	if (fptr->height % 8) {  in draw_text()
372 				 * by separating per 8-line boundaries.  in cfb_invert_area()
375 				const size_t index = ((j / 8) * fb->x_res) + i;  in cfb_invert_area()
380 				 * between the start line or end line and the 8-line boundary.  in cfb_invert_area()
382 				if ((j % 8) > 0) {  in cfb_invert_area()
383 					uint8_t m = BIT_MASK((j % 8));  in cfb_invert_area()
388 					 * drawing within 8 lines from the start line  in cfb_invert_area()
390 					if (remains < 8) {  in cfb_invert_area()
391 						m |= BIT_MASK((8 - (j % 8) + remains))  in cfb_invert_area()
392 						     << ((j % 8) + remains);  in cfb_invert_area()
400 					j += 7 - (j % 8);  in cfb_invert_area()
401 				} else if (remains >= 8) {  in cfb_invert_area()
406 					uint8_t m = BIT_MASK(8 - remains) << (remains);  in cfb_invert_area()
428 	for (size_t i = 0; i < fb->x_res * fb->y_res / 8U; i++) {  in cfb_invert()
579 	fb->ppt = 8U;  in cfb_framebuffer_init()