summaryrefslogtreecommitdiffstats
path: root/apps/plugins/lib/gray.h
blob: dadac9298f5240fbfc8903b43b14a890a0bac06a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
/***************************************************************************
*             __________               __   ___.
*   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
*   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
*   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
*   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
*                     \/            \/     \/    \/            \/
* $Id$
*
* Greyscale framework
*
* This is a generic framework to use greyscale display within Rockbox
* plugins. It does not work for the player.
*
* Copyright (C) 2004-2005 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__

#ifndef SIMULATOR /* not for simulator by now */
#include "plugin.h"

#ifdef HAVE_LCD_BITMAP /* and also not for the Player */

#define GRAY_MAX_LEVEL 255 /* The real value is variable, so normalise */
#define GRAY_BLACK 0
#define GRAY_WHITE GRAY_MAX_LEVEL

/* 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, 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(int brightness);
int  gray_get_foreground(void);
void gray_set_background(int brightness);
int  gray_get_background(void);
void gray_set_drawinfo(int mode, int fg_brightness, int 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 ***/

#define _PBLOCK_EXP 3
#define _PBLOCK (1 << _PBLOCK_EXP)

/* flag definitions */
#define _GRAY_RUNNING          0x0001  /* greyscale overlay is running */
#define _GRAY_DEFERRED_UPDATE  0x0002  /* lcd_update() requested */

/* unsigned 16 bit multiplication (a single instruction on the SH) */
#define MULU16(a, b) ((unsigned long) \
                     (((unsigned short) (a)) * ((unsigned short) (b))))

/* The grayscale buffer management structure */
struct _gray_info
{
    int x;
    int by;         /* 8-pixel units */
    int width;
    int height;
    int bheight;    /* 8-pixel units */
    int depth;      /* number_of_bitplanes  = (number_of_grayscales - 1) */
    int cur_plane;  /* for the timer isr */
    int drawmode;              /* current draw mode */
    int fg_brightness;         /* current foreground brightness */
    int bg_brightness;         /* current background brightness */
    long plane_size;
    unsigned long flags;       /* various flags, see #defines */
    unsigned long randmask;    /* mask for random value in _writepixel() */
    unsigned long *bitpattern; /* start of pattern table */
    unsigned char *plane_data; /* start of bitplane data */
    unsigned char *cur_buffer; /* start of current chunky pixel buffer */
    unsigned char *back_buffer;/* start of chunky pixel back buffer */
    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 /* !SIMULATOR */
#endif /* __GRAY_H__ */