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132 lines
4.0 KiB
C
132 lines
4.0 KiB
C
/* $Id: draw.h,v 1.50 2005/06/15 18:45:00 jonas Exp $ */
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#ifndef EL__TERMINAL_DRAW_H
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#define EL__TERMINAL_DRAW_H
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struct color_pair;
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struct box;
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struct terminal;
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/* All attributes should fit inside an unsigned char. */
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/* XXX: The bold mask is used as part of the color encoding. */
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enum screen_char_attr {
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SCREEN_ATTR_UNSEARCHABLE = 0x01,
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SCREEN_ATTR_BOLD = 0x08,
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SCREEN_ATTR_ITALIC = 0x10,
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SCREEN_ATTR_UNDERLINE = 0x20,
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SCREEN_ATTR_STANDOUT = 0x40,
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SCREEN_ATTR_FRAME = 0x80,
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};
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/* One position in the terminal screen's image. */
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struct screen_char {
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/* Contains either character value or frame data. */
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unsigned char data;
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/* Attributes are screen_char_attr bits. */
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unsigned char attr;
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/* The encoded fore- and background color. */
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#if defined(CONFIG_88_COLORS) || defined(CONFIG_256_COLORS)
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unsigned char color[2];
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#else
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unsigned char color[1];
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#endif
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};
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#define copy_screen_chars(to, from, amount) \
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do { memcpy(to, from, (amount) * sizeof(struct screen_char)); } while (0)
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/* Linux frame symbols table (it's magically converted to other terminals when
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* needed). */
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/* In the screen image, they have attribute SCREEN_ATTR_FRAME; you should drop them
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* to the image using draw_border_char(). */
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/* TODO: When we'll support internal Unicode, this should be changed to some
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* Unicode sequences. --pasky */
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enum border_char {
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/* single-lined */
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BORDER_SULCORNER = 218,
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BORDER_SURCORNER = 191,
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BORDER_SDLCORNER = 192,
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BORDER_SDRCORNER = 217,
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BORDER_SLTEE = 180, /* => the tee points to the left => -| */
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BORDER_SRTEE = 195,
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BORDER_SVLINE = 179,
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BORDER_SHLINE = 196,
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BORDER_SCROSS = 197, /* + */
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/* double-lined */ /* TODO: The TEE-chars! */
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BORDER_DULCORNER = 201,
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BORDER_DURCORNER = 187,
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BORDER_DDLCORNER = 200,
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BORDER_DDRCORNER = 188,
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BORDER_DVLINE = 186,
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BORDER_DHLINE = 205,
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};
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/* 0 -> 1 <- 2 v 3 ^ */
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enum border_cross_direction {
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BORDER_X_RIGHT = 0,
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BORDER_X_LEFT,
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BORDER_X_DOWN,
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BORDER_X_UP
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};
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/* Extracts a char from the screen. */
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struct screen_char *get_char(struct terminal *, int x, int y);
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/* Sets the color of a screen position. */
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void draw_char_color(struct terminal *term, int x, int y,
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struct color_pair *color);
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/* Sets the data of a screen position. */
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void draw_char_data(struct terminal *term, int x, int y, unsigned char data);
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/* Sets the data to @border and of a screen position. */
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void draw_border_char(struct terminal *term, int x, int y,
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enum border_char border, struct color_pair *color);
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/* Sets the cross position of two borders. */
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void draw_border_cross(struct terminal *, int x, int y,
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enum border_cross_direction, struct color_pair *color);
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/* Draws a char. */
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void draw_char(struct terminal *term, int x, int y,
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unsigned char data, enum screen_char_attr attr,
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struct color_pair *color);
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/* Draws area defined by @box using the same colors and attributes. */
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void draw_box(struct terminal *term, struct box *box,
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unsigned char data, enum screen_char_attr attr,
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struct color_pair *color);
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/* Draws a shadow of @width and @height with color @color around @box. */
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void draw_shadow(struct terminal *term, struct box *box,
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struct color_pair *color, int width, int height);
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/* Draw borders. */
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void draw_border(struct terminal *term, struct box *box,
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struct color_pair *color, int width);
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/* Draws @length chars from @text. */
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void draw_text(struct terminal *term, int x, int y,
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unsigned char *text, int length,
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enum screen_char_attr attr,
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struct color_pair *color);
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/* Draws @length chars from @line on the screen. */
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/* Used by viewer to copy over a document. */
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void draw_line(struct terminal *term, int x, int y, int length,
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struct screen_char *line);
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/* Updates the terminals cursor position. When @blockable is set the
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* block_cursor terminal option decides whether the cursor should be put at the
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* bottom right corner of the screen. */
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void set_cursor(struct terminal *term, int x, int y, int blockable);
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/* Blanks the screen. */
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void clear_terminal(struct terminal *);
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#endif
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