common/io/tem_safe.c

4  * The contents of this file are subject to the terms of the
24  * Use is subject to license terms.
35  *   The functions in this file *must* be able to function in
40  * The following restrictions pertain to every function
178  * RFE might be desireable to allow dynamic font loading.  The
179  * original intention to facilitate dynamic fonts can be seen
181  * the original code is retained but modified to be suited to
245  * the user hits L1+A or the equivalent to enter OBP or the debugger.).
274  * of ASCII characters, which are treated as a byte-stream input to the
298 	 * Send the data we just got to the framebuffer.
325  * Copy a rectangle from one location to another on the frame buffer
438  * if parameters [0..count - 1] are not set, set them to the value
473 			/* reset to initial normal settings */
645 			/* erase cursor to end of screen */
646 			/* FIRST erase cursor to end of line */
664 			/* erase beginning of screen to cursor */
673 			/* THEN erase beginning of line to cursor */
698 			/* erase cursor to end of line */
708 			/* erase beginning of line to cursor */
784 		 * Restrict the count to a sane value to keep from
838  * Add character to internal buffer.
839  * When its full, send it to the next layer.
903 			 * scroll but just return cursor to top of screen,
950 		 * Call the primitive to render this data.
966  * We have just done something to the current output point.  Reset the start
979  * major terminations are to control character or normal character
1003 	if (tem->tvs_state != A_STATE_ESC) {	/* Need to get parameters? */
1049 			 * already as we want to be.
1054 				 * If we have switched the characters to be the
1056 				 * well to keep them the inverse of the screen.
1070 			 * already where as we want to be.
1075 				 * If we have switched the characters to be the
1077 				 * well to keep them the inverse of the screen.
1259 	 * to overflow, so we check "count" independently.
1297  * This function is used to blit a rectangular color image,
1298  * unperturbed on the underlying framebuffer, to render
1300  * fills a rectangle bounded to the width and height parameters.
1301  * The color pixel data must to be pre-adjusted by the caller
1418 		 * when our kernel console term begins to scroll up,
1439 		 * We need to clear OBP's columns area outside our kernel
1440 		 * console term. So that we set ma.e_col to entire row here.
1507  * our kernel console term. So we need to clear OBP output garbage outside
1521  *	  |---> columns area to be cleared
1570 	 * to clear OBP output later.
1578  * and reset the cursor to start point.
1720 	 * clipped to the screen boundaries.  This seems to be what SPARC
1952 	 * The minus 2 is to make sure we have at least a 1 pixel
2079  * high-order byte set to zero.
2178  *    nrows:	the number of rows to clear
2179  *    offset_y:	the offset of height in pixels to begin clear
2181  *    ncols:	the number of cols to clear
2182  *    offset_x:	the offset of width in pixels to begin clear
2259 	unsigned char   *to;
2275 			to = to_row_start;
2280 				*to++ = *from++;
2284 		 * Offset to the end of the region and copy backwards.
2293 			to = to_row_start;
2296 				*--to = *--from;
2402 	 * Display data in tvs_screen_buf to the actual framebuffer in a
2422 				 * Call the primitive to render this data.
2441 		 * Call the primitive to render this data.