/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * New greyscale framework * * This is a generic framework to display 129 shades of grey on low-depth * bitmap LCDs (Archos b&w, Iriver & Ipod 4-grey) within plugins. * * Copyright (C) 2008 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 __GREY_H__ #define __GREY_H__ #include "plugin.h" #if defined(HAVE_LCD_BITMAP) && (LCD_DEPTH < 4) /* The greyscale lib uses 8 bit brightness values natively on input. */ #define GREY_BRIGHTNESS(y) (y) /* Some predefined levels for convenience: */ #define GREY_BLACK GREY_BRIGHTNESS(0) #define GREY_DARKGRAY GREY_BRIGHTNESS(85) #define GREY_LIGHTGRAY GREY_BRIGHTNESS(170) #define GREY_WHITE GREY_BRIGHTNESS(255) /* Greyscale library management structure declaration. You need one of these * in every plugin using the library, depending on whether the structure should * use IRAM or not. */ #define GREY_INFO_STRUCT struct _grey_info _grey_info; #define GREY_INFO_STRUCT_IRAM struct _grey_info _grey_info IBSS_ATTR; /* Features you can request on library init (ORed together): */ #define GREY_BUFFERED 0x0001 #define GREY_RAWMAPPED 0x0002 /* Library initialisation and release */ bool grey_init(struct plugin_api* newrb, unsigned char *gbuf, long gbuf_size, unsigned features, int width, int height, long *buf_taken); void grey_release(void); /* Special functions */ void grey_show(bool enable); void grey_deferred_lcd_update(void); /* Update functions */ void grey_update(void); void grey_update_rect(int x, int y, int width, int height); /* Parameter handling */ void grey_set_position(int x, int y); void grey_set_drawmode(int mode); int grey_get_drawmode(void); void grey_set_foreground(unsigned brightness); unsigned grey_get_foreground(void); void grey_set_background(unsigned brightness); unsigned grey_get_background(void); void grey_set_drawinfo(int mode, unsigned fg_brightness, unsigned bg_brightness); void grey_setfont(int newfont); int grey_getstringsize(const unsigned char *str, int *w, int *h); /* Whole display */ void grey_clear_display(void); void grey_ub_clear_display(void); /* Pixel */ void grey_drawpixel(int x, int y); /* Lines */ void grey_drawline(int x1, int y1, int x2, int y2); void grey_hline(int x1, int x2, int y); void grey_vline(int x, int y1, int y2); void grey_drawrect(int x, int y, int nx, int ny); /* Filled primitives */ void grey_fillrect(int x, int y, int nx, int ny); void grey_filltriangle(int x1, int y1, int x2, int y2, int x3, int y3); /* Bitmaps */ void grey_mono_bitmap_part(const unsigned char *src, int src_x, int src_y, int stride, int x, int y, int width, int height); void grey_mono_bitmap(const unsigned char *src, int x, int y, int width, int height); void grey_gray_bitmap_part(const unsigned char *src, int src_x, int src_y, int stride, int x, int y, int width, int height); void grey_gray_bitmap(const unsigned char *src, int x, int y, int width, int height); void grey_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 grey_ub_gray_bitmap(const unsigned char *src, int x, int y, int width, int height); /* Text */ void grey_putsxyofs(int x, int y, int ofs, const unsigned char *str); void grey_putsxy(int x, int y, const unsigned char *str); /* Scrolling */ void grey_scroll_left(int count); void grey_scroll_right(int count); void grey_scroll_up(int count); void grey_scroll_down(int count); void grey_ub_scroll_left(int count); void grey_ub_scroll_right(int count); void grey_ub_scroll_up(int count); void grey_ub_scroll_down(int count); /*** Internal stuff ***/ /* flag definitions */ #define _GREY_RUNNING 0x0001 /* greyscale overlay is running */ #define _GREY_DEFERRED_UPDATE 0x0002 /* lcd_update() requested */ /* fast unsigned multiplication (16x16bit->32bit or 32x32bit->32bit, * whichever is faster for the architecture) */ #ifdef CPU_ARM #define _GREY_MULUQ(a, b) ((uint32_t) (((uint32_t) (a)) * ((uint32_t) (b)))) #else #define _GREY_MULUQ(a, b) ((uint32_t) (((uint16_t) (a)) * ((uint16_t) (b)))) #endif #if LCD_PIXELFORMAT == HORIZONTAL_PACKING #define _GREY_BSHIFT 0 #else #if LCD_DEPTH == 1 #define _GREY_BSHIFT 3 #elif LCD_DEPTH == 2 #define _GREY_BSHIFT 2 #endif #endif /* LCD_PIXELFORMAT */ #define _GREY_BSIZE (1<<_GREY_BSHIFT) #define _GREY_BMASK (_GREY_BSIZE-1) /* The greyscale buffer management structure */ struct _grey_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; /* 4-pixel or 8-pixel units */ int bheight; /* 4-pixel or 8-pixel units */ #endif unsigned long flags; /* various flags, see #defines */ struct plugin_api *rb; /* plugin API pointer */ unsigned char *values; /* start of greyscale pixel values */ unsigned char *phases; /* start of greyscale pixel phases */ unsigned char *buffer; /* start of chunky pixel buffer (for buffered mode) */ unsigned char gvalue[256]; /* calculated brightness -> greyvalue table */ int fg_brightness; /* current foreground brightness */ int bg_brightness; /* current background brightness */ int drawmode; /* current draw mode */ int curfont; /* current selected font */ }; /* Global variable, defined in the plugin */ extern struct _grey_info _grey_info; #endif /* HAVE_LCD_BITMAP && (LCD_DEPTH < 4) */ #endif /* __GREY_H__ */