1 files changed, 166 insertions, 0 deletions

diff --git a/apps/plugins/lib/grey.h b/apps/plugins/lib/grey.h
new file mode 100644
index 0000000000..136794bd26
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+++ b/apps/plugins/lib/grey.h
@@ -0,0 +1,166 @@
+/***************************************************************************
+*             __________               __   ___.
+*   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)
+
+#define GREY_BRIGHTNESS(y) (y)
+
+#define GREY_BLACK     GREY_BRIGHTNESS(0)
+#define GREY_DARKGRAY  GREY_BRIGHTNESS(85)
+#define GREY_LIGHTGRAY GREY_BRIGHTNESS(170)
+#define GREY_WHITE     GREY_BRIGHTNESS(255)
+
+/* Library initialisation and release */
+bool grey_init(struct plugin_api* newrb, unsigned char *gbuf, long gbuf_size,
+               bool buffered, 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_X_ADVANCE sizeof(struct grey_data)
+#else
+#if LCD_DEPTH == 1
+#define _GREY_X_ADVANCE (8*sizeof(struct grey_data))
+#elif LCD_DEPTH == 2
+#define _GREY_X_ADVANCE (4*sizeof(struct grey_data))
+#endif
+#endif /* LCD_PIXELFORMAT */
+
+/* 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 */
+#ifndef SIMULATOR
+    struct grey_data *data;    /* start of greyscale display data */
+#endif
+    unsigned char *buffer;     /* start of chunky pixel buffer (for buffered mode) */
+    unsigned char gvalue[256]; /* calculated brightness -> greyvalue table */
+    int fg_val;                /* current foreground value */
+    int bg_val;                /* current background value */
+    int fg_brightness;         /* current foreground brightness */
+    int bg_brightness;         /* current background brightness */
+    int drawmode;              /* current draw mode */
+    int curfont;               /* current selected font */
+};
+
+/* Global variables */
+extern struct plugin_api *_grey_rb;
+extern struct _grey_info _grey_info;
+
+#endif /* HAVE_LCD_BITMAP && (LCD_DEPTH < 4) */
+#endif /* __GREY_H__ */