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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Greyscale framework
*
* This is a generic framework to display up to 33 shades of grey
* on low-depth bitmap LCDs (Archos b&w, Iriver 4-grey) within plugins.
*
* Copyright (C) 2004-2006 Jens Arnold
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef __GRAY_H__
#define __GRAY_H__
#include "plugin.h"
#ifdef HAVE_LCD_BITMAP /* not for the Player */
#define GRAY_BRIGHTNESS(y) (y)
#define GRAY_BLACK GRAY_BRIGHTNESS(0)
#define GRAY_DARKGRAY GRAY_BRIGHTNESS(85)
#define GRAY_LIGHTGRAY GRAY_BRIGHTNESS(170)
#define GRAY_WHITE GRAY_BRIGHTNESS(255)
/* Library initialisation and release */
int gray_init(struct plugin_api* newrb, unsigned char *gbuf, long gbuf_size,
bool buffered, int width, int bheight, int depth, int gamma,
long *buf_taken);
void gray_release(void);
/* Special functions */
void gray_show(bool enable);
void gray_deferred_lcd_update(void);
/* Update functions */
void gray_update(void);
void gray_update_rect(int x, int y, int width, int height);
/* Parameter handling */
void gray_set_position(int x, int by);
void gray_set_drawmode(int mode);
int gray_get_drawmode(void);
void gray_set_foreground(unsigned brightness);
unsigned gray_get_foreground(void);
void gray_set_background(unsigned brightness);
unsigned gray_get_background(void);
void gray_set_drawinfo(int mode, unsigned fg_brightness, unsigned bg_brightness);
void gray_setfont(int newfont);
int gray_getstringsize(const unsigned char *str, int *w, int *h);
/* Whole display */
void gray_clear_display(void);
void gray_ub_clear_display(void);
/* Pixel */
void gray_drawpixel(int x, int y);
/* Lines */
void gray_drawline(int x1, int y1, int x2, int y2);
void gray_hline(int x1, int x2, int y);
void gray_vline(int x, int y1, int y2);
void gray_drawrect(int x, int y, int nx, int ny);
/* Filled primitives */
void gray_fillrect(int x, int y, int nx, int ny);
void gray_filltriangle(int x1, int y1, int x2, int y2, int x3, int y3);
/* Bitmaps */
void gray_mono_bitmap_part(const unsigned char *src, int src_x, int src_y,
int stride, int x, int y, int width, int height);
void gray_mono_bitmap(const unsigned char *src, int x, int y, int width,
int height);
void gray_gray_bitmap_part(const unsigned char *src, int src_x, int src_y,
int stride, int x, int y, int width, int height);
void gray_gray_bitmap(const unsigned char *src, int x, int y, int width,
int height);
void gray_ub_gray_bitmap_part(const unsigned char *src, int src_x, int src_y,
int stride, int x, int y, int width, int height);
void gray_ub_gray_bitmap(const unsigned char *src, int x, int y, int width,
int height);
/* Text */
void gray_putsxyofs(int x, int y, int ofs, const unsigned char *str);
void gray_putsxy(int x, int y, const unsigned char *str);
/* Scrolling */
void gray_scroll_left(int count);
void gray_scroll_right(int count);
void gray_scroll_up(int count);
void gray_scroll_down(int count);
void gray_ub_scroll_left(int count);
void gray_ub_scroll_right(int count);
void gray_ub_scroll_up(int count);
void gray_ub_scroll_down(int count);
/*** Internal stuff ***/
/* flag definitions */
#define _GRAY_RUNNING 0x0001 /* greyscale overlay is running */
#define _GRAY_DEFERRED_UPDATE 0x0002 /* lcd_update() requested */
/* fast unsigned multiplication (16x16bit->32bit or 32x32bit->32bit,
* whichever is faster for the architecture) */
#ifdef CPU_ARM
#define _GRAY_MULUQ(a, b) ((uint32_t) (((uint32_t) (a)) * ((uint32_t) (b))))
#else
#define _GRAY_MULUQ(a, b) ((uint32_t) (((uint16_t) (a)) * ((uint16_t) (b))))
#endif
/* The grayscale buffer management structure */
struct _gray_info
{
int x;
int y;
int width;
int height;
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
int bx; /* 8-pixel units */
int bwidth; /* 8-pixel units */
#else /* vertical packing */
int by; /* 8-pixel units */
int bheight; /* 8-pixel units */
#endif
int depth; /* number_of_bitplanes = (number_of_grayscales - 1) */
unsigned long flags; /* various flags, see #defines */
#ifndef SIMULATOR
int cur_plane; /* for the timer isr */
long plane_size;
unsigned long randmask; /* mask for random value in _writepixel() */
unsigned long *bitpattern; /* start of pattern table */
unsigned char *plane_data; /* start of bitplane data */
#endif
unsigned char *cur_buffer; /* start of current chunky pixel buffer */
unsigned char *back_buffer;/* start of chunky pixel back buffer */
unsigned char idxtable[256]; /* calculated brightness -> index translation table */
int fg_index; /* current foreground index */
int bg_index; /* current background index */
int fg_brightness; /* current foreground brightness, for returning */
int bg_brightness; /* current background brightness, for returning */
int drawmode; /* current draw mode */
int curfont; /* current selected font */
};
/* Global variables */
extern struct plugin_api *_gray_rb;
extern struct _gray_info _gray_info;
extern short _gray_random_buffer;
#endif /* HAVE_LCD_BITMAP */
#endif /* __GRAY_H__ */
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