display.h

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/* LCD graphics functions */
/* Copyright (C) 2009, 2010 Holger Dietze
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) version 3.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License along
 *   with this program; if not, see <http://www.gnu.org/licenses/>.
 */

#ifndef DISPLAY_H
#define DISPLAY_H

#ifdef HAVE_STDDEF_H
#include <stddef.h>
#endif
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#include <avr/pgmspace.h>
#include "../../font/font.h"

typedef enum {
  op_clear  = 0b00, 
  op_invert = 0b01, 
  op_keep   = 0b10, 
  op_set    = 0b11, 
} hl_blt_1op;

/* for two pixels: */
typedef enum {
  op2_clearall = 0b0000,
  op2_notand   = 0b0001,
  op2_0010     = 0b0010,
  op2_notsrc   = 0b0011,
  op2_clearnot = 0b0100,
  op2_invert   = 0b0101,
  op2_xor      = 0b0110,
  op2_notor    = 0b0111,
  op2_and      = 0b1000,
  op2_1001     = 0b1001,
  op2_keep     = 0b1010,
  op2_1011     = 0b1011,
  op2_copysrc  = 0b1100,
  op2_1101     = 0b1101,
  op2_or       = 0b1110,
  op2_setall   = 0b1111,
} hl_blt_2op;

void hl_lcd_op_pixel (uint8_t x, uint8_t y, hl_blt_1op op);

void hl_lcd_setall (uint8_t fill);

void hl_lcd_set_font (const font_t * f);

void hl_lcd_get_current_font (font_t * f);
void hl_lcd_set_current_font (const font_t * f);

void hl_lcd_drawchar (uint8_t x, uint8_t y, char c);

void hl_lcd_drawchar_font (uint8_t x, uint8_t y, char c, const font_t * f);

uint8_t hl_lcd_get_charwidth (void) __attribute__((pure));
uint8_t hl_lcd_get_charheight (void) __attribute__((pure));

void hl_lcd_drawstr (uint8_t x, uint8_t y, const char * s);
void hl_lcd_drawstr_P (uint8_t x, uint8_t y, PGM_P s);
void hl_lcd_drawstrn (uint8_t x, uint8_t y, const char * s, size_t len);
void hl_lcd_drawstrn_P (uint8_t x, uint8_t y, PGM_P s, size_t len);

inline void hl_lcd_clear (void) { hl_lcd_setall (0); }

typedef struct rectangle_s {
  uint8_t x0, y0; /* upper left corner */
  uint8_t x1, y1; /* lower right corner */
} rectangle_t;

void hl_lcd_scroll_up (rectangle_t win, uint8_t lines);

void hl_lcd_set_rectangle (uint8_t x0,uint8_t y0, uint8_t x1,uint8_t y1,
                           hl_blt_1op op);

inline void hl_lcd_set_line_horiz (uint8_t x0, uint8_t y, uint8_t x1,
                                   hl_blt_1op op)
{
  hl_lcd_set_rectangle (x0,y, x1,y+1, op);
}

inline void hl_lcd_set_line_vert (uint8_t x, uint8_t y0, uint8_t y1,
                                  hl_blt_1op op)
{
  hl_lcd_set_rectangle (x,y0, x+1,y1, op);
}


size_t hl_lcd_save (uint8_t x0,uint8_t y0, uint8_t x1,uint8_t y1,
                    uint8_t * save, size_t size);
size_t hl_lcd_restore (uint8_t x0,uint8_t y0, uint8_t x1,uint8_t y1,
                       const uint8_t * save, size_t size);
size_t hl_lcd_save_size (uint8_t x0,uint8_t y0, uint8_t x1,uint8_t y1)
  __attribute__((const));
#define HL_LCD_SAVE_SIZE(X0,Y0, X1,Y1) \
  ((((X1+7)/8)-(X0/8))*(Y1-Y0))


#endif