32c69452d6
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11436 a1c6a512-1295-4272-9138-f99709370657
164 lines
5.9 KiB
C
164 lines
5.9 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Greyscale framework
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*
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* This is a generic framework to display up to 33 shades of grey
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* on low-depth bitmap LCDs (Archos b&w, Iriver 4-grey) within plugins.
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*
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* Copyright (C) 2004-2006 Jens Arnold
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef __GRAY_H__
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#define __GRAY_H__
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#include "plugin.h"
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#ifdef HAVE_LCD_BITMAP /* not for the Player */
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#define GRAY_BRIGHTNESS(y) (y)
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#define GRAY_BLACK GRAY_BRIGHTNESS(0)
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#define GRAY_DARKGRAY GRAY_BRIGHTNESS(85)
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#define GRAY_LIGHTGRAY GRAY_BRIGHTNESS(170)
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#define GRAY_WHITE GRAY_BRIGHTNESS(255)
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/* Library initialisation and release */
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int gray_init(struct plugin_api* newrb, unsigned char *gbuf, long gbuf_size,
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bool buffered, int width, int bheight, int depth, int gamma,
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long *buf_taken);
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void gray_release(void);
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/* Special functions */
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void gray_show(bool enable);
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void gray_deferred_lcd_update(void);
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/* Update functions */
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void gray_update(void);
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void gray_update_rect(int x, int y, int width, int height);
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/* Parameter handling */
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void gray_set_position(int x, int by);
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void gray_set_drawmode(int mode);
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int gray_get_drawmode(void);
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void gray_set_foreground(unsigned brightness);
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unsigned gray_get_foreground(void);
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void gray_set_background(unsigned brightness);
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unsigned gray_get_background(void);
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void gray_set_drawinfo(int mode, unsigned fg_brightness, unsigned bg_brightness);
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void gray_setfont(int newfont);
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int gray_getstringsize(const unsigned char *str, int *w, int *h);
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/* Whole display */
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void gray_clear_display(void);
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void gray_ub_clear_display(void);
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/* Pixel */
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void gray_drawpixel(int x, int y);
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/* Lines */
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void gray_drawline(int x1, int y1, int x2, int y2);
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void gray_hline(int x1, int x2, int y);
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void gray_vline(int x, int y1, int y2);
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void gray_drawrect(int x, int y, int nx, int ny);
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/* Filled primitives */
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void gray_fillrect(int x, int y, int nx, int ny);
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void gray_filltriangle(int x1, int y1, int x2, int y2, int x3, int y3);
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/* Bitmaps */
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void gray_mono_bitmap_part(const unsigned char *src, int src_x, int src_y,
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int stride, int x, int y, int width, int height);
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void gray_mono_bitmap(const unsigned char *src, int x, int y, int width,
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int height);
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void gray_gray_bitmap_part(const unsigned char *src, int src_x, int src_y,
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int stride, int x, int y, int width, int height);
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void gray_gray_bitmap(const unsigned char *src, int x, int y, int width,
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int height);
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void gray_ub_gray_bitmap_part(const unsigned char *src, int src_x, int src_y,
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int stride, int x, int y, int width, int height);
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void gray_ub_gray_bitmap(const unsigned char *src, int x, int y, int width,
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int height);
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/* Text */
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void gray_putsxyofs(int x, int y, int ofs, const unsigned char *str);
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void gray_putsxy(int x, int y, const unsigned char *str);
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/* Scrolling */
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void gray_scroll_left(int count);
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void gray_scroll_right(int count);
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void gray_scroll_up(int count);
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void gray_scroll_down(int count);
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void gray_ub_scroll_left(int count);
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void gray_ub_scroll_right(int count);
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void gray_ub_scroll_up(int count);
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void gray_ub_scroll_down(int count);
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/*** Internal stuff ***/
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/* flag definitions */
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#define _GRAY_RUNNING 0x0001 /* greyscale overlay is running */
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#define _GRAY_DEFERRED_UPDATE 0x0002 /* lcd_update() requested */
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/* fast unsigned multiplication (16x16bit->32bit or 32x32bit->32bit,
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* whichever is faster for the architecture) */
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#ifdef CPU_ARM
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#define _GRAY_MULUQ(a, b) ((uint32_t) (((uint32_t) (a)) * ((uint32_t) (b))))
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#else
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#define _GRAY_MULUQ(a, b) ((uint32_t) (((uint16_t) (a)) * ((uint16_t) (b))))
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#endif
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/* The grayscale buffer management structure */
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struct _gray_info
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{
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int x;
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int y;
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int width;
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int height;
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#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
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int bx; /* 8-pixel units */
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int bwidth; /* 8-pixel units */
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#else /* vertical packing */
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int by; /* 8-pixel units */
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int bheight; /* 8-pixel units */
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#endif
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int depth; /* number_of_bitplanes = (number_of_grayscales - 1) */
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unsigned long flags; /* various flags, see #defines */
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#ifndef SIMULATOR
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int cur_plane; /* for the timer isr */
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long plane_size;
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unsigned long randmask; /* mask for random value in _writepixel() */
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unsigned long *bitpattern; /* start of pattern table */
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unsigned char *plane_data; /* start of bitplane data */
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#endif
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unsigned char *cur_buffer; /* start of current chunky pixel buffer */
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unsigned char *back_buffer;/* start of chunky pixel back buffer */
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unsigned char idxtable[256]; /* calculated brightness -> index translation table */
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int fg_index; /* current foreground index */
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int bg_index; /* current background index */
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int fg_brightness; /* current foreground brightness, for returning */
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int bg_brightness; /* current background brightness, for returning */
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int drawmode; /* current draw mode */
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int curfont; /* current selected font */
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};
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/* Global variables */
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extern struct plugin_api *_gray_rb;
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extern struct _gray_info _gray_info;
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extern short _gray_random_buffer;
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#endif /* HAVE_LCD_BITMAP */
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#endif /* __GRAY_H__ */
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