diff options
Diffstat (limited to 'libhb/deccc608sub.c')
| -rw-r--r-- | libhb/deccc608sub.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/libhb/deccc608sub.c b/libhb/deccc608sub.c index 3c6d098e3..93c9cda81 100644 --- a/libhb/deccc608sub.c +++ b/libhb/deccc608sub.c @@ -965,6 +965,79 @@ static int write_cc_buffer(struct s_write *wb) return wrote_something; } +static void move_roll_up(struct s_write *wb, int row) +{ + struct eia608_screen *use_buffer; + int ii, src, dst, keep_lines; + + switch (wb->data608->mode) + { + case MODE_ROLLUP_2: + keep_lines = 2; + break; + case MODE_ROLLUP_3: + keep_lines = 3; + break; + case MODE_ROLLUP_4: + keep_lines = 4; + break; + default: + // Not rollup mode, nothing to do + return; + } + + if (row == wb->data608->rollup_base_row) + { + // base row didn't change, nothing to do + return; + } + + use_buffer = get_current_visible_buffer(wb); + if (row < wb->data608->rollup_base_row) + { + src = wb->data608->rollup_base_row - keep_lines + 1; + dst = row - keep_lines + 1; + for (ii = 0; ii < keep_lines; ii++) + { + memcpy(use_buffer->characters[dst], use_buffer->characters[src], CC608_SCREEN_WIDTH+1); + memcpy(use_buffer->colors[dst], use_buffer->colors[src], CC608_SCREEN_WIDTH+1); + memcpy(use_buffer->fonts[dst], use_buffer->fonts[src], CC608_SCREEN_WIDTH+1); + use_buffer->row_used[dst] = use_buffer->row_used[src]; + + memset(use_buffer->characters[src], ' ', CC608_SCREEN_WIDTH); + memset(use_buffer->colors[src], COL_WHITE, CC608_SCREEN_WIDTH); + memset(use_buffer->fonts[src], FONT_REGULAR, CC608_SCREEN_WIDTH); + use_buffer->characters[src][CC608_SCREEN_WIDTH] = 0; + use_buffer->row_used[src] = 0; + + src++; + dst++; + } + } + else + { + src = wb->data608->rollup_base_row; + dst = row; + for (ii = 0; ii < keep_lines; ii++) + { + memcpy(use_buffer->characters[dst], use_buffer->characters[src], CC608_SCREEN_WIDTH+1); + memcpy(use_buffer->colors[dst], use_buffer->colors[src], CC608_SCREEN_WIDTH+1); + memcpy(use_buffer->fonts[dst], use_buffer->fonts[src], CC608_SCREEN_WIDTH+1); + use_buffer->row_used[dst] = use_buffer->row_used[src]; + + memset(use_buffer->characters[src], ' ', CC608_SCREEN_WIDTH); + memset(use_buffer->colors[src], COL_WHITE, CC608_SCREEN_WIDTH); + memset(use_buffer->fonts[src], FONT_REGULAR, CC608_SCREEN_WIDTH); + use_buffer->characters[src][CC608_SCREEN_WIDTH] = 0; + use_buffer->row_used[src] = 0; + + src--; + dst--; + } + } + use_buffer->dirty = 1; +} + static void roll_up(struct s_write *wb) { struct eia608_screen *use_buffer; @@ -1388,10 +1461,39 @@ static void handle_pac(unsigned char c1, unsigned char c2, struct s_write *wb) if (debug_608) hb_log (" -- Position: %d:%d, color: %s, font: %s\n",row, indent,color_text[color][0],font_text[font]); + + // CC spec says to the preferred method to handle a roll-up base row + // that causes the display to scroll off the top of the screen is to + // adjust the base row down. + int keep_lines; + switch (wb->data608->mode) + { + case MODE_ROLLUP_2: + keep_lines = 2; + break; + case MODE_ROLLUP_3: + keep_lines = 3; + break; + case MODE_ROLLUP_4: + keep_lines = 4; + break; + default: + // Not rollup mode, all rows ok + keep_lines = 0; + return; + } + if (row < keep_lines) + { + row = keep_lines; + } if (wb->data608->mode != MODE_TEXT) { // According to Robson, row info is discarded in text mode // but column is accepted + // + // CC-608 spec says current rollup display must move to the + // new position when the cursor row changes + move_roll_up(wb, row - 1); wb->data608->cursor_row = row - 1 ; // Since the array is 0 based } wb->data608->rollup_base_row = row - 1; |