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Grayscale library ported to the grayscale iPods, first version. Added C reference versions of gray_update_rect() for both horizontal and vertical pixel packing. gray_update_rect() and gray_ub_gray_bitmap_part() not yet assembler optimised. Grayscale screendump doesn't work yet. * Fixed button assignments for iPod in grayscale.c

Browse source 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10468 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2006-08-07 01:46:42 +00:00
parent 5375e26e51
commit c214e7bb0c
20 changed files with 1360 additions and 232 deletions
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3
apps/plugins/SOURCES
View file

@ -27,12 +27,11 @@ dice.c
#ifdef HAVE_LCD_BITMAP /* Not for the Player */
text_editor.c
#if CONFIG_LCD != LCD_IPOD2BPP /* Plugins needing the grayscale lib */
/* Plugins needing the grayscale lib on low-depth LCDs */
fire.c
jpeg.c
mandelbrot.c
plasma.c
#endif
bounce.c
bubbles.c

2
apps/plugins/SUBDIRS
View file

@ -28,7 +28,7 @@ pacbox
#endif
/* For all the color targets apart from the Gigabeat */
#if defined(HAVE_LCD_COLOR) && !defined(TOSHIBA_GIGABEAT_F) || defined(IRIVER_H100_SERIES)
#if (defined(HAVE_LCD_COLOR) && !defined(TOSHIBA_GIGABEAT_F)) || (LCD_DEPTH == 2)
doom
#endif

2
apps/plugins/cube.c
View file

@ -547,7 +547,7 @@ enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
xlcd_init(rb);
#elif defined(USE_GSLIB)
gbuf = (unsigned char *)rb->plugin_get_buffer(&gbuf_size);
if (gray_init(rb, gbuf, gbuf_size, true, LCD_WIDTH, LCD_HEIGHT/8, 3, 0, NULL)
if (gray_init(rb, gbuf, gbuf_size, true, LCD_WIDTH, LCD_HEIGHT, 3, 0, NULL)
!= 3)
{
rb->splash(HZ, true, "Couldn't get grayscale buffer");

7
apps/plugins/doom/i_video.c
View file

@ -16,7 +16,10 @@
* GNU General Public License for more details.
*
* $Log$
* Revision 1.19 2006/08/03 20:17:22 bagder
* Revision 1.20 2006/08/07 01:46:41 amiconn
* Grayscale library ported to the grayscale iPods, first version. Added C reference versions of gray_update_rect() for both horizontal and vertical pixel packing. gray_update_rect() and gray_ub_gray_bitmap_part() not yet assembler optimised. Grayscale screendump doesn't work yet. * Fixed button assignments for iPod in grayscale.c
*
* Revision 1.19 2006-08-03 20:17:22 bagder
* Barry Wardell's keymappings for H10
*
* Revision 1.18 2006-08-02 00:21:59 amiconn
@ -500,7 +503,7 @@ void I_InitGraphics(void)
#ifndef HAVE_LCD_COLOR
gbuf=malloc(GRAYBUFSIZE);
gray_init(rb, gbuf, GRAYBUFSIZE, false, LCD_WIDTH, LCD_HEIGHT/8, 32,
gray_init(rb, gbuf, GRAYBUFSIZE, false, LCD_WIDTH, LCD_HEIGHT, 32,
3<<7 /* 1.5 */, NULL);
/* switch on grayscale overlay */
gray_show(true);

2
apps/plugins/fire.c
View file

@ -338,7 +338,7 @@ int main(void)
#ifdef HAVE_LCD_COLOR
shades = 256;
#else
shades = gray_init(rb, gbuf, gbuf_size, false, LCD_WIDTH, LCD_HEIGHT/8,
shades = gray_init(rb, gbuf, gbuf_size, false, LCD_WIDTH, LCD_HEIGHT,
32, 2<<8, NULL) + 1;
if(shades <= 1)
{

14
apps/plugins/grayscale.c
View file

@ -21,7 +21,7 @@
#include "plugin.h"
#if defined(HAVE_LCD_BITMAP) && (LCD_DEPTH < 4) && (CONFIG_LCD != LCD_IPOD2BPP)
#if defined(HAVE_LCD_BITMAP) && (LCD_DEPTH < 4)
#include "gray.h"
PLUGIN_HEADER
@ -54,12 +54,12 @@ PLUGIN_HEADER
#define GRAYSCALE_RC_OFF BUTTON_RC_STOP
#elif (CONFIG_KEYPAD == IPOD_3G_PAD) || (CONFIG_KEYPAD == IPOD_4G_PAD)
#define GRAYSCALE_SHIFT (BUTTON_SELECT | BUTTON_REL)
#define GRAYSCALE_UP BUTTON_MENU
#define GRAYSCALE_DOWN BUTTON_PLAY
#define GRAYSCALE_SHIFT BUTTON_SELECT
#define GRAYSCALE_UP BUTTON_SCROLL_BACK
#define GRAYSCALE_DOWN BUTTON_SCROLL_FWD
#define GRAYSCALE_LEFT BUTTON_LEFT
#define GRAYSCALE_RIGHT BUTTON_RIGHT
#define GRAYSCALE_OFF (BUTTON_SELECT | BUTTON_MENU)
#define GRAYSCALE_OFF BUTTON_MENU
#endif
#define GFX_HEIGHT (LCD_HEIGHT-8)
@ -182,11 +182,11 @@ int main(void)
32 bitplanes for 33 shades of grey.
H1x0: 160 pixels wide, 30 rows (120 pixels) high, (try to) reserve
32 bitplanes for 33 shades of grey. */
shades = gray_init(rb, gbuf, gbuf_size, true, LCD_WIDTH, GFX_HEIGHT/8,
shades = gray_init(rb, gbuf, gbuf_size, true, LCD_WIDTH, GFX_HEIGHT,
32, 0, NULL) + 1;
/* place greyscale overlay 1 row down */
gray_set_position(0, 1);
gray_set_position(0, 8);
rb->snprintf(pbuf, sizeof(pbuf), "Shades: %d", shades);
rb->lcd_puts(0, 0, pbuf);

2
apps/plugins/jpeg.c
View file

@ -2783,7 +2783,7 @@ enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
#ifdef USEGSLIB
/* initialize the grayscale buffer: 32 bitplanes for 33 shades of gray. */
grayscales = gray_init(rb, buf, buf_size, false, LCD_WIDTH, LCD_HEIGHT/8,
grayscales = gray_init(rb, buf, buf_size, false, LCD_WIDTH, LCD_HEIGHT,
32, 2<<8, &graysize) + 1;
buf += graysize;
buf_size -= graysize;

2
apps/plugins/lib/SOURCES
View file

@ -1,7 +1,7 @@
configfile.c
playback_control.c
rgb_hsv.c
#if defined(HAVE_LCD_BITMAP) && (LCD_DEPTH < 4) && (CONFIG_LCD != LCD_IPOD2BPP)
#if defined(HAVE_LCD_BITMAP) && (LCD_DEPTH < 4)
gray_core.c
gray_draw.c
gray_parm.c

13
apps/plugins/lib/gray.h
View file

@ -27,7 +27,7 @@
#include "plugin.h"
#ifdef HAVE_LCD_BITMAP /* and also not for the Player */
#ifdef HAVE_LCD_BITMAP /* not for the Player */
#define GRAY_BRIGHTNESS(y) (y)
@ -109,9 +109,6 @@ 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 */
@ -124,10 +121,16 @@ void gray_ub_scroll_down(int count);
struct _gray_info
{
int x;
int by; /* 8-pixel units */
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

419
apps/plugins/lib/gray_core.c
View file

@ -11,7 +11,8 @@
* Core & miscellaneous functions
*
* 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.
* on low-depth bitmap LCDs (Archos b&w, Iriver 4-grey, iPod 4-grey)
* within plugins.
*
* Copyright (C) 2004-2006 Jens Arnold
*
@ -28,9 +29,14 @@
#ifdef HAVE_LCD_BITMAP
#include "gray.h"
#ifdef CPU_PP
#define NEED_BOOST
#endif
/* Global variables */
struct plugin_api *_gray_rb = NULL; /* global api struct pointer */
struct _gray_info _gray_info; /* global info structure */
#ifndef SIMULATOR
short _gray_random_buffer; /* buffer for random number generator */
@ -106,6 +112,43 @@ static const unsigned char lcdlinear[256] = {
227, 228, 230, 232, 233, 235, 237, 239,
241, 243, 245, 247, 249, 251, 253, 255
};
#elif (CONFIG_LCD == LCD_IPOD2BPP) || (CONFIG_LCD == LCD_IPODMINI)
/* measured and interpolated curve for mini LCD */
/* TODO: verify this curve on the fullsize greyscale LCD */
static const unsigned char lcdlinear[256] = {
0, 3, 6, 8, 11, 14, 17, 19,
22, 24, 27, 29, 32, 34, 36, 38,
40, 42, 44, 45, 47, 48, 50, 51,
52, 54, 55, 56, 57, 58, 58, 59,
60, 61, 62, 62, 63, 64, 64, 65,
66, 66, 67, 67, 68, 68, 69, 69,
70, 70, 70, 71, 71, 71, 72, 72,
73, 73, 73, 74, 74, 74, 74, 75,
75, 75, 76, 76, 76, 77, 77, 77,
78, 78, 78, 79, 79, 79, 80, 80,
80, 80, 81, 81, 81, 82, 82, 82,
83, 83, 83, 84, 84, 84, 85, 85,
85, 85, 86, 86, 86, 87, 87, 87,
87, 88, 88, 88, 89, 89, 89, 89,
90, 90, 90, 91, 91, 91, 92, 92,
92, 93, 93, 93, 94, 94, 94, 95,
95, 96, 96, 96, 97, 97, 98, 98,
99, 99, 99, 100, 100, 101, 101, 102,
102, 103, 103, 104, 104, 105, 105, 106,
106, 107, 107, 108, 108, 109, 109, 110,
110, 111, 111, 112, 113, 113, 114, 114,
115, 115, 116, 117, 117, 118, 118, 119,
120, 120, 121, 122, 122, 123, 124, 124,
125, 126, 126, 127, 128, 128, 129, 130,
131, 131, 132, 133, 134, 134, 135, 136,
137, 138, 139, 140, 141, 142, 143, 144,
145, 146, 147, 148, 149, 150, 152, 153,
154, 156, 157, 159, 160, 162, 163, 165,
167, 168, 170, 172, 174, 176, 178, 180,
182, 184, 187, 189, 192, 194, 197, 200,
203, 206, 209, 212, 215, 219, 222, 226,
229, 233, 236, 240, 244, 248, 251, 255
};
#endif
#else /* SIMULATOR */
/* undo a (generic) PC display gamma of 2.0 to simulate target behaviour */
@ -147,20 +190,22 @@ static const unsigned char lcdlinear[256] = {
/* Prototypes */
static inline void _deferred_update(void) __attribute__ ((always_inline));
static int exp_s16p16(int x);
static int log_s16p16(int x);
static void gray_screendump_hook(int fd);
#ifdef SIMULATOR
static unsigned long _gray_get_pixel(int x, int y);
#else
static void _timer_isr(void);
#endif
static void gray_screendump_hook(int fd);
/* Update LCD areas not covered by the greyscale overlay */
static inline void _deferred_update(void)
{
int x1 = MAX(_gray_info.x, 0);
int x2 = MIN(_gray_info.x + _gray_info.width, LCD_WIDTH);
int y1 = MAX(_gray_info.by << _PBLOCK_EXP, 0);
int y2 = MIN((_gray_info.by << _PBLOCK_EXP) + _gray_info.height, LCD_HEIGHT);
int y1 = MAX(_gray_info.y, 0);
int y2 = MIN(_gray_info.y + _gray_info.height, LCD_HEIGHT);
if (y1 > 0) /* refresh part above overlay, full width */
_gray_rb->lcd_update_rect(0, 0, LCD_WIDTH, y1);
@ -179,9 +224,15 @@ static inline void _deferred_update(void)
/* Timer interrupt handler: display next bitplane */
static void _timer_isr(void)
{
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
_gray_rb->lcd_blit(_gray_info.plane_data + MULU16(_gray_info.plane_size,
_gray_info.cur_plane), _gray_info.bx, _gray_info.y,
_gray_info.bwidth, _gray_info.height, _gray_info.bwidth);
#else
_gray_rb->lcd_blit(_gray_info.plane_data + MULU16(_gray_info.plane_size,
_gray_info.cur_plane), _gray_info.x, _gray_info.by,
_gray_info.width, _gray_info.bheight, _gray_info.width);
#endif
if (++_gray_info.cur_plane >= _gray_info.depth)
_gray_info.cur_plane = 0;
@ -218,7 +269,7 @@ static int exp_s16p16(int x)
}
/* fixed point log() */
int log_s16p16(int x)
static int log_s16p16(int x)
{
int t;
int y = 0xa65af;
@ -252,7 +303,9 @@ int log_s16p16(int x)
memory. Unbuffered operation provides only a subset of
drawing functions. (only gray_bitmap drawing and scrolling)
width = width in pixels (1..LCD_WIDTH)
bheight = height in LCD pixel-block units (8 pixels) (1..LCD_HEIGHT/8)
height = height in pixels (1..LCD_HEIGHT)
Note that depending on the target LCD, either height or
width are rounded up to a multiple of 8.
depth = number of bitplanes to use (1..32).
gamma = gamma value as s8p8 fixed point. gamma <= 0 means no
correction at all, i.e. no LCD linearisation as well.
@ -277,9 +330,10 @@ int log_s16p16(int x)
used. The total memory needed can be calculated as follows:
total_mem =
shades * sizeof(long) (bitpatterns)
+ (width * bheight) * depth (bitplane data)
+ [horizontal_packing] ? (bitplane data)
((width + 7) / 8) * height * depth : width * ((height + 7) / 8) * depth
+ buffered ? (chunky front- & backbuffer)
(width * bheight * 8 * 2) : 0
(width * height * 2) : 0
+ 0..3 (longword alignment)
The function tries to be as authentic as possible regarding memory usage on
@ -287,10 +341,10 @@ int log_s16p16(int x)
one situation where it will consume more memory on the sim than on the
target: if you're allocating a low depth (< 8) without buffering. */
int gray_init(struct plugin_api* newrb, unsigned char *gbuf, long gbuf_size,
bool buffered, int width, int bheight, int depth, int gamma,
bool buffered, int width, int height, int depth, int gamma,
long *buf_taken)
{
int possible_depth, i;
int possible_depth, bdim, i;
long plane_size, buftaken;
unsigned data;
#ifndef SIMULATOR
@ -300,10 +354,18 @@ int gray_init(struct plugin_api* newrb, unsigned char *gbuf, long gbuf_size,
_gray_rb = newrb;
if ((unsigned) width > LCD_WIDTH
|| (unsigned) bheight > (LCD_HEIGHT/_PBLOCK)
|| (unsigned) height > LCD_HEIGHT
|| depth < 1)
return 0;
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
bdim = (width + 7) >> 3;
width = bdim << 3;
#else
bdim = (height + 7) >> 3;
height = bdim << 3;
#endif
/* the buffer has to be long aligned */
buftaken = (-(long)gbuf) & 3;
gbuf += buftaken;
@ -311,7 +373,7 @@ int gray_init(struct plugin_api* newrb, unsigned char *gbuf, long gbuf_size,
/* chunky front- & backbuffer */
if (buffered)
{
plane_size = MULU16(width, bheight << _PBLOCK_EXP);
plane_size = MULU16(width, height);
buftaken += 2 * plane_size;
if (buftaken > gbuf_size)
return 0;
@ -324,7 +386,11 @@ int gray_init(struct plugin_api* newrb, unsigned char *gbuf, long gbuf_size,
gbuf += plane_size;
}
plane_size = MULU16(width, bheight);
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
plane_size = MULU16(bdim, height);
#else
plane_size = MULU16(width, bdim);
#endif
possible_depth = (gbuf_size - buftaken - sizeof(long))
/ (plane_size + sizeof(long));
@ -339,7 +405,7 @@ int gray_init(struct plugin_api* newrb, unsigned char *gbuf, long gbuf_size,
{
long orig_size = depth * plane_size + (depth + 1) * sizeof(long);
plane_size = MULU16(width, bheight << _PBLOCK_EXP);
plane_size = MULU16(width, height);
if (plane_size > orig_size)
{
buftaken += plane_size;
@ -357,10 +423,16 @@ int gray_init(struct plugin_api* newrb, unsigned char *gbuf, long gbuf_size,
buftaken += depth * plane_size + (depth + 1) * sizeof(long);
_gray_info.x = 0;
_gray_info.by = 0;
_gray_info.y = 0;
_gray_info.width = width;
_gray_info.height = bheight << _PBLOCK_EXP;
_gray_info.bheight = bheight;
_gray_info.height = height;
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
_gray_info.bx = 0;
_gray_info.bwidth = bdim;
#else
_gray_info.by = 0;
_gray_info.bheight = bdim;
#endif
_gray_info.depth = depth;
_gray_info.flags = 0;
#ifndef SIMULATOR
@ -463,13 +535,20 @@ void gray_show(bool enable)
_gray_rb->sim_lcd_ex_init(_gray_info.depth + 1, _gray_get_pixel);
gray_update();
#else /* !SIMULATOR */
#ifdef NEED_BOOST
_gray_rb->cpu_boost(true);
#endif
#if CONFIG_LCD == LCD_SSD1815
_gray_rb->timer_register(1, NULL, TIMER_FREQ / 67, 1, _timer_isr);
#elif CONFIG_LCD == LCD_S1D15E06
_gray_rb->timer_register(1, NULL, TIMER_FREQ / 70, 1, _timer_isr);
#elif CONFIG_LCD == LCD_IPOD2BPP
/* FIXME: verify value */
_gray_rb->timer_register(1, NULL, TIMER_FREQ / 40, 1, _timer_isr);
#elif CONFIG_LCD == LCD_IPODMINI
_gray_rb->timer_register(1, NULL, TIMER_FREQ / 44, 1, _timer_isr);
#elif CONFIG_LCD == LCD_IFP7XX
/* TODO: implement for iFP */
(void)_timer_isr;
(void)_timer_isr; /* TODO: implement for iFP */
#endif /* CONFIG_LCD */
#endif /* !SIMULATOR */
_gray_rb->screen_dump_set_hook(gray_screendump_hook);
@ -480,6 +559,9 @@ void gray_show(bool enable)
_gray_rb->sim_lcd_ex_init(0, NULL);
#else
_gray_rb->timer_unregister();
#ifdef NEED_BOOST
_gray_rb->cpu_boost(false);
#endif
#endif
_gray_info.flags &= ~_GRAY_RUNNING;
_gray_rb->screen_dump_set_hook(NULL);
@ -492,9 +574,15 @@ void gray_show(bool enable)
Note that x and y are in LCD coordinates, not graybuffer coordinates! */
static unsigned long _gray_get_pixel(int x, int y)
{
return _gray_info.cur_buffer[MULU16(x - _gray_info.x, _gray_info.height)
+ y - (_gray_info.by << _PBLOCK_EXP)]
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
return _gray_info.cur_buffer[MULU16(y - _gray_info.y, _gray_info.width)
+ x - _gray_info.x]
+ (1 << LCD_DEPTH);
#else
return _gray_info.cur_buffer[MULU16(x - _gray_info.x, _gray_info.height)
+ y - _gray_info.y]
+ (1 << LCD_DEPTH);
#endif
}
/* Update a rectangular area of the greyscale overlay */
@ -506,7 +594,7 @@ void gray_update_rect(int x, int y, int width, int height)
height = _gray_info.height - y;
x += _gray_info.x;
y += _gray_info.by << _PBLOCK_EXP;
y += _gray_info.y;
if (x + width > LCD_WIDTH)
width = LCD_WIDTH - x;
@ -517,38 +605,41 @@ void gray_update_rect(int x, int y, int width, int height)
}
#else /* !SIMULATOR */
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
/* Update a rectangular area of the greyscale overlay */
void gray_update_rect(int x, int y, int width, int height)
{
int ymax;
int xmax, bwidth;
long srcofs;
unsigned char *dst;
if (width <= 0)
if ((width <= 0) || (height <= 0))
return; /* nothing to do */
/* The Y coordinates have to work on whole pixel block rows */
ymax = (y + height - 1) >> _PBLOCK_EXP;
y >>= _PBLOCK_EXP;
/* The X coordinates have to work on whole pixel block columns */
xmax = (x + width - 1) >> 3;
x >>= 3;
if (x + width > _gray_info.width)
width = _gray_info.width - x;
if (ymax >= _gray_info.bheight)
ymax = _gray_info.bheight - 1;
if (y + height > _gray_info.height)
height = _gray_info.height - y;
if (xmax >= _gray_info.bwidth)
xmax = _gray_info.bwidth - 1;
bwidth = xmax - x + 1;
srcofs = (y << _PBLOCK_EXP) + MULU16(_gray_info.height, x);
dst = _gray_info.plane_data + MULU16(_gray_info.width, y) + x;
srcofs = MULU16(_gray_info.width, y) + (x << 3);
dst = _gray_info.plane_data + MULU16(_gray_info.bwidth, y) + x;
/* Copy specified rectange bitmap to hardware */
for (; y <= ymax; y++)
/* Copy specified rectangle bitmap to hardware */
for (; height > 0; height--)
{
long srcofs_row = srcofs;
unsigned char *dst_row = dst;
unsigned char *dst_end = dst_row + width;
unsigned char *dst_end = dst_row + bwidth;
do
{
#if (CONFIG_CPU == SH7034) && (LCD_DEPTH == 1)
unsigned long pat_stack[8];
unsigned long *pat_ptr;
unsigned char *cbuf, *bbuf;
@ -557,6 +648,145 @@ void gray_update_rect(int x, int y, int width, int height)
cbuf = _gray_info.cur_buffer + srcofs_row;
bbuf = _gray_info.back_buffer + srcofs_row;
#if 0 /* CPU specific asm versions will go here */
#else /* C version, for reference*/
(void)pat_ptr;
/* check whether anything changed in the 8-pixel block */
change = *(uint32_t *)cbuf ^ *(uint32_t *)bbuf;
cbuf += sizeof(uint32_t);
bbuf += sizeof(uint32_t);
change |= *(uint32_t *)cbuf ^ *(uint32_t *)bbuf;
if (change != 0)
{
unsigned char *addr, *end;
unsigned mask = 0;
unsigned test = 1;
int i;
cbuf = _gray_info.cur_buffer + srcofs_row;
bbuf = _gray_info.back_buffer + srcofs_row;
/* precalculate the bit patterns with random shifts
* for all 8 pixels and put them on an extra "stack" */
for (i = 7; i >= 0; i--)
{
unsigned pat = 0;
unsigned char cur = *cbuf++;
unsigned char back = *bbuf;
*bbuf++ = cur;
mask <<= 1;
if (cur != back)
{
int shift;
pat = _gray_info.bitpattern[cur];
/* shift pattern pseudo-random, simple & fast PRNG */
_gray_random_buffer = 75 * _gray_random_buffer + 74;
shift = (_gray_random_buffer >> 8) & _gray_info.randmask;
if (shift >= _gray_info.depth)
shift -= _gray_info.depth;
pat = (pat << shift) | (pat >> (_gray_info.depth - shift));
mask |= 1;
}
pat_stack[i] = pat;
}
addr = dst_row;
end = addr + MULU16(_gray_info.depth, _gray_info.plane_size);
/* set the bits for all 8 pixels in all bytes according to the
* precalculated patterns on the pattern stack */
mask = (~mask & 0xff);
if (mask == 0)
{
do
{
unsigned data = 0;
for (i = 7; i >= 0; i--)
data = (data << 1) | ((pat_stack[i] & test) ? 1 : 0);
*addr = data;
addr += _gray_info.plane_size;
test <<= 1;
}
while (addr < end);
}
else
{
do
{
unsigned data = 0;
for (i = 7; i >= 0; i--)
data = (data << 1) | ((pat_stack[i] & test) ? 1 : 0);
*addr = (*addr & mask) | data;
addr += _gray_info.plane_size;
test <<= 1;
}
while (addr < end);
}
}
#endif /* CONFIG_CPU */
srcofs_row += 8;
dst_row++;
}
while (dst_row < dst_end);
srcofs += _gray_info.width;
dst += _gray_info.bwidth;
}
}
#else /* LCD_PIXELFORMAT == VERTICAL_PACKING */
/* Update a rectangular area of the greyscale overlay */
void gray_update_rect(int x, int y, int width, int height)
{
int ymax;
long srcofs;
unsigned char *dst;
if ((width <= 0) || (height <= 0))
return; /* nothing to do */
/* The Y coordinates have to work on whole pixel block rows */
ymax = (y + height - 1) >> 3;
y >>= 3;
if (x + width > _gray_info.width)
width = _gray_info.width - x;
if (ymax >= _gray_info.bheight)
ymax = _gray_info.bheight - 1;
srcofs = (y << 3) + MULU16(_gray_info.height, x);
dst = _gray_info.plane_data + MULU16(_gray_info.width, y) + x;
/* Copy specified rectangle bitmap to hardware */
for (; y <= ymax; y++)
{
long srcofs_row = srcofs;
unsigned char *dst_row = dst;
unsigned char *dst_end = dst_row + width;
do
{
unsigned long pat_stack[8];
unsigned long *pat_ptr;
unsigned char *cbuf, *bbuf;
unsigned change;
cbuf = _gray_info.cur_buffer + srcofs_row;
bbuf = _gray_info.back_buffer + srcofs_row;
#if CONFIG_CPU == SH7034
asm volatile (
"mov.l @%[cbuf]+,r1 \n"
"mov.l @%[bbuf]+,r2 \n"
@ -738,15 +968,7 @@ void gray_update_rect(int x, int y, int width, int height)
"r0", "r1", "r2", "r3", "r6", "r7", "r8", "r9", "r10"
);
}
#elif defined(CPU_COLDFIRE) && (LCD_DEPTH == 2)
unsigned long pat_stack[8];
unsigned long *pat_ptr;
unsigned char *cbuf, *bbuf;
unsigned change;
cbuf = _gray_info.cur_buffer + srcofs_row;
bbuf = _gray_info.back_buffer + srcofs_row;
#elif defined(CPU_COLDFIRE)
asm volatile (
"move.l (%[cbuf])+,%%d0 \n"
"move.l (%[bbuf])+,%%d1 \n"
@ -924,16 +1146,105 @@ void gray_update_rect(int x, int y, int width, int height)
"d0", "d1", "d2", "d3", "d4", "d5", "d6", "a0", "a1"
);
}
#endif /* CONFIG_CPU, LCD_DEPTH */
#else /* C version, for reference*/
#warning C version of gray_update_rect() used
(void)pat_ptr;
/* check whether anything changed in the 8-pixel block */
change = *(uint32_t *)cbuf ^ *(uint32_t *)bbuf;
cbuf += sizeof(uint32_t);
bbuf += sizeof(uint32_t);
change |= *(uint32_t *)cbuf ^ *(uint32_t *)bbuf;
if (change != 0)
{
unsigned char *addr, *end;
unsigned mask = 0;
unsigned test = 1;
int i;
cbuf = _gray_info.cur_buffer + srcofs_row;
bbuf = _gray_info.back_buffer + srcofs_row;
/* precalculate the bit patterns with random shifts
* for all 8 pixels and put them on an extra "stack" */
for (i = 0; i < 8; i++)
{
unsigned pat = 0;
unsigned char cur = *cbuf++;
unsigned char back = *bbuf;
*bbuf++ = cur;
if (cur != back)
{
int shift;
pat = _gray_info.bitpattern[cur];
/* shift pattern pseudo-random, simple & fast PRNG */
_gray_random_buffer = 75 * _gray_random_buffer + 74;
shift = (_gray_random_buffer >> 8) & _gray_info.randmask;
if (shift >= _gray_info.depth)
shift -= _gray_info.depth;
pat = (pat << shift) | (pat >> (_gray_info.depth - shift));
mask |= 0x100;
}
mask >>= 1;
pat_stack[i] = pat;
}
addr = dst_row;
end = addr + MULU16(_gray_info.depth, _gray_info.plane_size);
/* set the bits for all 8 pixels in all bytes according to the
* precalculated patterns on the pattern stack */
mask = (~mask & 0xff);
if (mask == 0)
{
do
{
unsigned data = 0;
for (i = 7; i >= 0; i--)
data = (data << 1) | ((pat_stack[i] & test) ? 1 : 0);
*addr = data;
addr += _gray_info.plane_size;
test <<= 1;
}
while (addr < end);
}
else
{
do
{
unsigned data = 0;
for (i = 7; i >= 0; i--)
data = (data << 1) | ((pat_stack[i] & test) ? 1 : 0);
*addr = (*addr & mask) | data;
addr += _gray_info.plane_size;
test <<= 1;
}
while (addr < end);
}
}
#endif /* CONFIG_CPU */
srcofs_row += _gray_info.height;
dst_row++;
}
while (dst_row < dst_end);
srcofs += _PBLOCK;
srcofs += 8;
dst += _gray_info.width;
}
}
#endif /* LCD_PIXELFORMAT */
#endif /* !SIMULATOR */
/* Update the whole greyscale overlay */
@ -1047,10 +1358,10 @@ static void gray_screendump_hook(int fd)
{
_gray_rb->memset(linebuf, 0, BMP_LINESIZE);
gy = y - (_gray_info.by << _PBLOCK_EXP);
gy = y - _gray_info.y;
#if LCD_DEPTH == 1
mask = 1 << (y & (_PBLOCK-1));
by = y >> _PBLOCK_EXP;
mask = 1 << (y & 7);
by = y >> 3;
lcdptr = _gray_rb->lcd_framebuffer + MULU16(LCD_WIDTH, by);
if ((unsigned) gy < (unsigned) _gray_info.height)
@ -1058,7 +1369,7 @@ static void gray_screendump_hook(int fd)
/* line contains greyscale (and maybe b&w) graphics */
#ifndef SIMULATOR
unsigned char *grayptr = _gray_info.plane_data
+ MULU16(_gray_info.width, gy >> _PBLOCK_EXP);
+ MULU16(_gray_info.width, gy >> 3);
#endif
for (x = 0; x < LCD_WIDTH; x++)
@ -1108,8 +1419,8 @@ static void gray_screendump_hook(int fd)
(void)mask;
#else
unsigned char *grayptr = _gray_info.plane_data
+ MULU16(_gray_info.width, gy >> _PBLOCK_EXP);
mask = 1 << (gy & (_PBLOCK-1));
+ MULU16(_gray_info.width, gy >> 3);
mask = 1 << (gy & 7);
#endif
for (x = 0; x < LCD_WIDTH; x++)

684
apps/plugins/lib/gray_draw.c
View file

@ -11,7 +11,8 @@
* Drawing functions
*
* 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.
* on low-depth bitmap LCDs (Archos b&w, Iriver 4-grey, iPod 4-grey)
* within plugins.
*
* Copyright (C) 2004-2006 Jens Arnold
*
@ -72,8 +73,13 @@ void gray_drawpixel(int x, int y)
{
if (((unsigned)x < (unsigned)_gray_info.width)
&& ((unsigned)y < (unsigned)_gray_info.height))
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
_gray_pixelfuncs[_gray_info.drawmode](&_gray_info.cur_buffer[MULU16(y,
_gray_info.width) + x]);
#else
_gray_pixelfuncs[_gray_info.drawmode](&_gray_info.cur_buffer[MULU16(x,
_gray_info.height) + y]);
#endif
}
/* Draw a line */
@ -131,7 +137,11 @@ void gray_drawline(int x1, int y1, int x2, int y2)
{
if (((unsigned)x < (unsigned)_gray_info.width)
&& ((unsigned)y < (unsigned)_gray_info.height))
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
pfunc(&_gray_info.cur_buffer[MULU16(y, _gray_info.width) + x]);
#else
pfunc(&_gray_info.cur_buffer[MULU16(x, _gray_info.height) + y]);
#endif
if (d < 0)
{
@ -148,6 +158,175 @@ void gray_drawline(int x1, int y1, int x2, int y2)
}
}
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
/* Draw a horizontal line (optimised) */
void gray_hline(int x1, int x2, int y)
{
int x;
int bits = 0;
unsigned char *dst;
bool fillopt = false;
void (*pfunc)(unsigned char *address);
/* direction flip */
if (x2 < x1)
{
x = x1;
x1 = x2;
x2 = x;
}
/* nothing to draw? */
if (((unsigned)y >= (unsigned)_gray_info.height)
|| (x1 >= _gray_info.width) || (x2 < 0))
return;
/* clipping */
if (x1 < 0)
x1 = 0;
if (x2 >= _gray_info.width)
x2 = _gray_info.width - 1;
if (_gray_info.drawmode & DRMODE_INVERSEVID)
{
if (_gray_info.drawmode & DRMODE_BG)
{
fillopt = true;
bits = _gray_info.bg_index;
}
}
else
{
if (_gray_info.drawmode & DRMODE_FG)
{
fillopt = true;
bits = _gray_info.fg_index;
}
}
pfunc = _gray_pixelfuncs[_gray_info.drawmode];
dst = &_gray_info.cur_buffer[MULU16(y, _gray_info.width) + x1];
if (fillopt)
_gray_rb->memset(dst, bits, x2 - x1 + 1);
else
{
unsigned char *dst_end = dst + x2 - x1;
do
pfunc(dst++);
while (dst <= dst_end);
}
}
/* Draw a vertical line (optimised) */
void gray_vline(int x, int y1, int y2)
{
int y;
unsigned char *dst, *dst_end;
void (*pfunc)(unsigned char *address);
/* direction flip */
if (y2 < y1)
{
y = y1;
y1 = y2;
y2 = y;
}
/* nothing to draw? */
if (((unsigned)x >= (unsigned)_gray_info.width)
|| (y1 >= _gray_info.height) || (y2 < 0))
return;
/* clipping */
if (y1 < 0)
y1 = 0;
if (y2 >= _gray_info.height)
y2 = _gray_info.height - 1;
pfunc = _gray_pixelfuncs[_gray_info.drawmode];
dst = &_gray_info.cur_buffer[MULU16(y1, _gray_info.width) + x];
dst_end = dst + MULU16(y2 - y1, _gray_info.width);
do
{
pfunc(dst);
dst += _gray_info.width;
}
while (dst <= dst_end);
}
/* Draw a filled triangle */
void gray_filltriangle(int x1, int y1, int x2, int y2, int x3, int y3)
{
int x, y;
long fp_x1, fp_x2, fp_dx1, fp_dx2;
/* sort vertices by increasing y value */
if (y1 > y3)
{
if (y2 < y3) /* y2 < y3 < y1 */
{
x = x1; x1 = x2; x2 = x3; x3 = x;
y = y1; y1 = y2; y2 = y3; y3 = y;
}
else if (y2 > y1) /* y3 < y1 < y2 */
{
x = x1; x1 = x3; x3 = x2; x2 = x;
y = y1; y1 = y3; y3 = y2; y2 = y;
}
else /* y3 <= y2 <= y1 */
{
x = x1; x1 = x3; x3 = x;
y = y1; y1 = y3; y3 = y;
}
}
else
{
if (y2 < y1) /* y2 < y1 <= y3 */
{
x = x1; x1 = x2; x2 = x;
y = y1; y1 = y2; y2 = y;
}
else if (y2 > y3) /* y1 <= y3 < y2 */
{
x = x2; x2 = x3; x3 = x;
y = y2; y2 = y3; y3 = y;
}
/* else already sorted */
}
if (y1 < y3) /* draw */
{
fp_dx1 = ((x3 - x1) << 16) / (y3 - y1);
fp_x1 = (x1 << 16) + (1<<15) + (fp_dx1 >> 1);
if (y1 < y2) /* first part */
{
fp_dx2 = ((x2 - x1) << 16) / (y2 - y1);
fp_x2 = (x1 << 16) + (1<<15) + (fp_dx2 >> 1);
for (y = y1; y < y2; y++)
{
gray_hline(fp_x1 >> 16, fp_x2 >> 16, y);
fp_x1 += fp_dx1;
fp_x2 += fp_dx2;
}
}
if (y2 < y3) /* second part */
{
fp_dx2 = ((x3 - x2) << 16) / (y3 - y2);
fp_x2 = (x2 << 16) + (1<<15) + (fp_dx2 >> 1);
for (y = y2; y < y3; y++)
{
gray_hline(fp_x1 >> 16, fp_x2 >> 16, y);
fp_x1 += fp_dx1;
fp_x2 += fp_dx2;
}
}
}
}
#else /* LCD_PIXELFORMAT == VERTICAL_PACKING */
/* Draw a horizontal line (optimised) */
void gray_hline(int x1, int x2, int y)
{
@ -244,88 +423,6 @@ void gray_vline(int x, int y1, int y2)
}
}
/* Draw a rectangular box */
void gray_drawrect(int x, int y, int width, int height)
{
if ((width <= 0) || (height <= 0))
return;
int x2 = x + width - 1;
int y2 = y + height - 1;
gray_vline(x, y, y2);
gray_vline(x2, y, y2);
gray_hline(x, x2, y);
gray_hline(x, x2, y2);
}
/* Fill a rectangular area */
void gray_fillrect(int x, int y, int width, int height)
{
int bits = 0;
unsigned char *dst, *dst_end;
bool fillopt = false;
void (*pfunc)(unsigned char *address);
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= _gray_info.width)
|| (y >= _gray_info.height) || (x + width <= 0) || (y + height <= 0))
return;
/* clipping */
if (x < 0)
{
width += x;
x = 0;
}
if (y < 0)
{
height += y;
y = 0;
}
if (x + width > _gray_info.width)
width = _gray_info.width - x;
if (y + height > _gray_info.height)
height = _gray_info.height - y;
if (_gray_info.drawmode & DRMODE_INVERSEVID)
{
if (_gray_info.drawmode & DRMODE_BG)
{
fillopt = true;
bits = _gray_info.bg_index;
}
}
else
{
if (_gray_info.drawmode & DRMODE_FG)
{
fillopt = true;
bits = _gray_info.fg_index;
}
}
pfunc = _gray_pixelfuncs[_gray_info.drawmode];
dst = &_gray_info.cur_buffer[MULU16(x, _gray_info.height) + y];
dst_end = dst + MULU16(width, _gray_info.height);
do
{
if (fillopt)
_gray_rb->memset(dst, bits, height);
else
{
unsigned char *dst_col = dst;
unsigned char *col_end = dst_col + height;
do
pfunc(dst_col++);
while (dst_col < col_end);
}
dst += _gray_info.height;
}
while (dst < dst_end);
}
/* Draw a filled triangle */
void gray_filltriangle(int x1, int y1, int x2, int y2, int x3, int y3)
{
@ -395,6 +492,111 @@ void gray_filltriangle(int x1, int y1, int x2, int y2, int x3, int y3)
}
}
}
#endif /* LCD_PIXELFORMAT */
/* Draw a rectangular box */
void gray_drawrect(int x, int y, int width, int height)
{
if ((width <= 0) || (height <= 0))
return;
int x2 = x + width - 1;
int y2 = y + height - 1;
gray_vline(x, y, y2);
gray_vline(x2, y, y2);
gray_hline(x, x2, y);
gray_hline(x, x2, y2);
}
/* Fill a rectangular area */
void gray_fillrect(int x, int y, int width, int height)
{
int bits = 0;
unsigned char *dst, *dst_end;
bool fillopt = false;
void (*pfunc)(unsigned char *address);
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= _gray_info.width)
|| (y >= _gray_info.height) || (x + width <= 0) || (y + height <= 0))
return;
/* clipping */
if (x < 0)
{
width += x;
x = 0;
}
if (y < 0)
{
height += y;
y = 0;
}
if (x + width > _gray_info.width)
width = _gray_info.width - x;
if (y + height > _gray_info.height)
height = _gray_info.height - y;
if (_gray_info.drawmode & DRMODE_INVERSEVID)
{
if (_gray_info.drawmode & DRMODE_BG)
{
fillopt = true;
bits = _gray_info.bg_index;
}
}
else
{
if (_gray_info.drawmode & DRMODE_FG)
{
fillopt = true;
bits = _gray_info.fg_index;
}
}
pfunc = _gray_pixelfuncs[_gray_info.drawmode];
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
dst = &_gray_info.cur_buffer[MULU16(y, _gray_info.width) + x];
dst_end = dst + MULU16(height, _gray_info.width);
do
{
if (fillopt)
_gray_rb->memset(dst, bits, width);
else
{
unsigned char *dst_row = dst;
unsigned char *row_end = dst_row + width;
do
pfunc(dst_row++);
while (dst_row < row_end);
}
dst += _gray_info.width;
}
while (dst < dst_end);
#else
dst = &_gray_info.cur_buffer[MULU16(x, _gray_info.height) + y];
dst_end = dst + MULU16(width, _gray_info.height);
do
{
if (fillopt)
_gray_rb->memset(dst, bits, height);
else
{
unsigned char *dst_col = dst;
unsigned char *col_end = dst_col + height;
do
pfunc(dst_col++);
while (dst_col < col_end);
}
dst += _gray_info.height;
}
while (dst < dst_end);
#endif
}
/* About Rockbox' internal monochrome bitmap format:
*
@ -403,9 +605,7 @@ void gray_filltriangle(int x1, int y1, int x2, int y2, int x3, int y3)
* vertically, LSB at top.
* The bytes are stored in row-major order, with byte 0 being top left,
* byte 1 2nd from left etc. The first row of bytes defines pixel rows
* 0..7, the second row defines pixel row 8..15 etc.
*
* This is similar to the internal lcd hw format. */
* 0..7, the second row defines pixel row 8..15 etc. */
/* Draw a partial monochrome bitmap */
void gray_mono_bitmap_part(const unsigned char *src, int src_x, int src_y,
@ -443,9 +643,41 @@ void gray_mono_bitmap_part(const unsigned char *src, int src_x, int src_y,
src_y &= 7;
src_end = src + width;
dst = &_gray_info.cur_buffer[MULU16(x, _gray_info.height) + y];
fgfunc = _gray_pixelfuncs[_gray_info.drawmode];
bgfunc = _gray_pixelfuncs[_gray_info.drawmode ^ DRMODE_INVERSEVID];
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
dst = &_gray_info.cur_buffer[MULU16(y, _gray_info.width) + x];
do
{
const unsigned char *src_col = src++;
unsigned char *dst_col = dst++;
unsigned data = *src_col >> src_y;
int numbits = 8 - src_y;
dst_end = dst_col + MULU16(height, _gray_info.width);
do
{
if (data & 0x01)
fgfunc(dst_col);
else
bgfunc(dst_col);
dst_col += _gray_info.width;
data >>= 1;
if (--numbits == 0)
{
src_col += stride;
data = *src_col;
numbits = 8;
}
}
while (dst_col < dst_end);
}
while (src < src_end);
#else /* LCD_PIXELFORMAT == VERTICAL_PACKING */
dst = &_gray_info.cur_buffer[MULU16(x, _gray_info.height) + y];
do
{
@ -475,6 +707,7 @@ void gray_mono_bitmap_part(const unsigned char *src, int src_x, int src_y,
dst += _gray_info.height;
}
while (src < src_end);
#endif /* LCD_PIXELFORMAT */
}
/* Draw a full monochrome bitmap */
@ -487,7 +720,6 @@ void gray_mono_bitmap(const unsigned char *src, int x, int y, int width, int hei
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)
{
const unsigned char *src_end;
unsigned char *dst, *dst_end;
/* nothing to draw? */
@ -514,25 +746,45 @@ void gray_gray_bitmap_part(const unsigned char *src, int src_x, int src_y,
height = _gray_info.height - y;
src += MULU16(stride, src_y) + src_x; /* move starting point */
src_end = src + width;
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
dst = &_gray_info.cur_buffer[MULU16(y, _gray_info.width) + x];
dst_end = dst + MULU16(height, _gray_info.width);
do
{
const unsigned char *src_row = src;
unsigned char *dst_row = dst;
unsigned char *row_end = dst_row + width;
do
*dst_row++ = _gray_info.idxtable[*src_row++];
while (dst_row < row_end);
src += stride;
dst += _gray_info.width;
}
while (dst < dst_end);
#else /* LCD_PIXELFORMAT == VERTICAL_PACKING */
dst = &_gray_info.cur_buffer[MULU16(x, _gray_info.height) + y];
dst_end = dst + height;
do
{
const unsigned char *src_col = src++;
unsigned char *dst_col = dst;
const unsigned char *src_row = src;
unsigned char *dst_row = dst++;
unsigned char *row_end = dst_row + MULU16(width, _gray_info.height);
dst_end = dst_col + height;
do
{
*dst_col++ = _gray_info.idxtable[*src_col];
src_col += stride;
*dst_row = _gray_info.idxtable[*src_row++];
dst_row += _gray_info.height;
}
while (dst_col < dst_end);
while (dst_row < row_end);
dst += _gray_info.height;
src += stride;
}
while (src < src_end);
while (dst < dst_end);
#endif /* LCD_PIXELFORMAT */
}
/* Draw a full greyscale bitmap, canonical format */
@ -612,6 +864,149 @@ void gray_ub_clear_display(void)
_gray_info.plane_size));
}
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
/* Write a pixel block, defined by their brightnesses in a greymap.
Address is the byte in the first bitplane, src is the greymap start address,
stride is the increment for the greymap to get to the next pixel, mask
determines which pixels of the destination block are changed. */
static void _writearray(unsigned char *address, const unsigned char *src,
unsigned mask)
{
unsigned long pat_stack[8];
unsigned long *pat_ptr = &pat_stack[8];
unsigned char *addr, *end;
#if 0 /* CPU specific asm versions will go here */
#else /* C version, for reference*/
unsigned test = 0x80;
int i;
/* precalculate the bit patterns with random shifts
* for all 8 pixels and put them on an extra "stack" */
for (i = 7; i >= 0; i--)
{
unsigned pat = 0;
if (mask & test)
{
int shift;
pat = _gray_info.bitpattern[_gray_info.idxtable[*src]];
/* shift pattern pseudo-random, simple & fast PRNG */
_gray_random_buffer = 75 * _gray_random_buffer + 74;
shift = (_gray_random_buffer >> 8) & _gray_info.randmask;
if (shift >= _gray_info.depth)
shift -= _gray_info.depth;
pat = (pat << shift) | (pat >> (_gray_info.depth - shift));
}
*(--pat_ptr) = pat;
src++;
test >>= 1;
}
addr = address;
end = addr + MULU16(_gray_info.depth, _gray_info.plane_size);
/* set the bits for all 8 pixels in all bytes according to the
* precalculated patterns on the pattern stack */
test = 1;
mask = (~mask & 0xff);
if (mask == 0)
{
do
{
unsigned data = 0;
for (i = 7; i >= 0; i--)
data = (data << 1) | ((pat_stack[i] & test) ? 1 : 0);
*addr = data;
addr += _gray_info.plane_size;
test <<= 1;
}
while (addr < end);
}
else
{
do
{
unsigned data = 0;
for (i = 7; i >= 0; i--)
data = (data << 1) | ((pat_stack[i] & test) ? 1 : 0);
*addr = (*addr & mask) | data;
addr += _gray_info.plane_size;
test <<= 1;
}
while (addr < end);
}
#endif
}
/* Draw a partial greyscale bitmap, canonical format */
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)
{
int shift, nx;
unsigned char *dst, *dst_end;
unsigned mask, mask_right;
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= _gray_info.width)
|| (y >= _gray_info.height) || (x + width <= 0) || (y + height <= 0))
return;
/* clipping */
if (x < 0)
{
width += x;
src_x -= x;
x = 0;
}
if (y < 0)
{
height += y;
src_y -= y;
y = 0;
}
if (x + width > _gray_info.width)
width = _gray_info.width - x;
if (y + height > _gray_info.height)
height = _gray_info.height - y;
shift = x & 7;
src += MULU16(stride, src_y) + src_x - shift;
dst = _gray_info.plane_data + (x >> 3) + MULU16(_gray_info.bwidth, y);
nx = width - 1 + shift;
mask = 0xFFu >> shift;
mask_right = 0xFFu << (~nx & 7);
dst_end = dst + MULU16(_gray_info.bwidth, height);
do
{
const unsigned char *src_row = src;
unsigned char *dst_row = dst;
unsigned mask_row = mask;
for (x = nx; x >= 8; x -= 8)
{
_writearray(dst_row++, src_row, mask_row);
src_row += 8;
mask_row = 0xFFu;
}
_writearray(dst_row, src_row, mask_row & mask_right);
src += stride;
dst += _gray_info.bwidth;
}
while (dst < dst_end);
}
#else /* LCD_PIXELFORMAT == VERTICAL_PACKING */
/* Write a pixel block, defined by their brightnesses in a greymap.
Address is the byte in the first bitplane, src is the greymap start address,
stride is the increment for the greymap to get to the next pixel, mask
@ -619,11 +1014,11 @@ void gray_ub_clear_display(void)
static void _writearray(unsigned char *address, const unsigned char *src,
int stride, unsigned mask)
{
#if (CONFIG_CPU == SH7034) && (LCD_DEPTH == 1)
unsigned long pat_stack[8];
unsigned long *pat_ptr = &pat_stack[8];
const unsigned char *_src;
unsigned char *addr, *end;
#if CONFIG_CPU == SH7034
const unsigned char *_src;
unsigned _mask, trash;
_mask = mask;
@ -784,11 +1179,8 @@ static void _writearray(unsigned char *address, const unsigned char *src,
: /* clobbers */
"r0", "r1", "r2", "r3", "r6", "r7", "r8", "r9", "r10"
);
#elif defined(CPU_COLDFIRE) && (LCD_DEPTH == 2)
unsigned long pat_stack[8];
unsigned long *pat_ptr = &pat_stack[8];
#elif defined(CPU_COLDFIRE)
const unsigned char *_src;
unsigned char *addr, *end;
unsigned _mask, trash;
_mask = mask;
@ -941,12 +1333,73 @@ static void _writearray(unsigned char *address, const unsigned char *src,
: /* clobbers */
"d0", "d1", "d2", "d3", "d4", "d5", "d6", "a0", "a1"
);
#elif defined(CPU_ARM) && (LCD_DEPTH == 1)
/* TODO: implement for iFP */
(void)address;
(void)src;
(void)stride;
(void)mask;
#else /* C version, for reference*/
#warning C version of _writearray() used
unsigned test = 1;
int i;
/* precalculate the bit patterns with random shifts
* for all 8 pixels and put them on an extra "stack" */
for (i = 7; i >= 0; i--)
{
unsigned pat = 0;
if (mask & test)
{
int shift;
pat = _gray_info.bitpattern[_gray_info.idxtable[*src]];
/* shift pattern pseudo-random, simple & fast PRNG */
_gray_random_buffer = 75 * _gray_random_buffer + 74;
shift = (_gray_random_buffer >> 8) & _gray_info.randmask;
if (shift >= _gray_info.depth)
shift -= _gray_info.depth;
pat = (pat << shift) | (pat >> (_gray_info.depth - shift));
}
*(--pat_ptr) = pat;
src += stride;
test <<= 1;
}
addr = address;
end = addr + MULU16(_gray_info.depth, _gray_info.plane_size);
/* set the bits for all 8 pixels in all bytes according to the
* precalculated patterns on the pattern stack */
test = 1;
mask = (~mask & 0xff);
if (mask == 0)
{
do
{
unsigned data = 0;
for (i = 0; i < 8; i++)
data = (data << 1) | ((pat_stack[i] & test) ? 1 : 0);
*addr = data;
addr += _gray_info.plane_size;
test <<= 1;
}
while (addr < end);
}
else
{
do
{
unsigned data = 0;
for (i = 0; i < 8; i++)
data = (data << 1) | ((pat_stack[i] & test) ? 1 : 0);
*addr = (*addr & mask) | data;
addr += _gray_info.plane_size;
test <<= 1;
}
while (addr < end);
}
#endif
}
@ -981,16 +1434,16 @@ void gray_ub_gray_bitmap_part(const unsigned char *src, int src_x, int src_y,
if (y + height > _gray_info.height)
height = _gray_info.height - y;
shift = y & (_PBLOCK-1);
shift = y & 7;
src += MULU16(stride, src_y) + src_x - MULU16(stride, shift);
dst = _gray_info.plane_data + x
+ MULU16(_gray_info.width, y >> _PBLOCK_EXP);
+ MULU16(_gray_info.width, y >> 3);
ny = height - 1 + shift;
mask = 0xFFu << shift;
mask_bottom = 0xFFu >> (~ny & (_PBLOCK-1));
mask_bottom = 0xFFu >> (~ny & 7);
for (; ny >= _PBLOCK; ny -= _PBLOCK)
for (; ny >= 8; ny -= 8)
{
const unsigned char *src_row = src;
unsigned char *dst_row = dst;
@ -1000,7 +1453,7 @@ void gray_ub_gray_bitmap_part(const unsigned char *src, int src_x, int src_y,
_writearray(dst_row++, src_row++, stride, mask);
while (dst_row < dst_end);
src += stride << _PBLOCK_EXP;
src += stride << 3;
dst += _gray_info.width;
mask = 0xFFu;
}
@ -1010,6 +1463,7 @@ void gray_ub_gray_bitmap_part(const unsigned char *src, int src_x, int src_y,
_writearray(dst++, src++, stride, mask);
while (dst < dst_end);
}
#endif /* LCD_PIXELFORMAT */
#endif /* !SIMULATOR */
@ -1020,6 +1474,4 @@ void gray_ub_gray_bitmap(const unsigned char *src, int x, int y, int width,
gray_ub_gray_bitmap_part(src, 0, 0, width, x, y, width, height);
}
#endif /* HAVE_LCD_BITMAP */

17
apps/plugins/lib/gray_parm.c
View file

@ -11,7 +11,8 @@
* Parameter handling
*
* 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.
* on low-depth bitmap LCDs (Archos b&w, Iriver 4-grey, iPod 4-grey)
* within plugins.
*
* Copyright (C) 2004-2006 Jens Arnold
*
@ -29,11 +30,19 @@
#include "gray.h"
/* Set position of the top left corner of the greyscale overlay
Note that by is in pixel-block units (8 pixels) */
void gray_set_position(int x, int by)
Note that depending on the target LCD, either x or y gets rounded
to the nearest multiple of 8 */
void gray_set_position(int x, int y)
{
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
_gray_info.bx = (x + 3) / 8;
x = 8 * _gray_info.bx;
#else
_gray_info.by = (y + 3) / 8;
y = 8 * _gray_info.by;
#endif
_gray_info.x = x;
_gray_info.by = by;
_gray_info.y = y;
if (_gray_info.flags & _GRAY_RUNNING)
{

373
apps/plugins/lib/gray_scroll.c
View file

@ -11,7 +11,8 @@
* Scrolling routines
*
* 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.
* on low-depth bitmap LCDs (Archos b&w, Iriver 4-grey, iPod 4-grey)
* within plugins.
*
* Copyright (C) 2004-2006 Jens Arnold
*
@ -30,6 +31,96 @@
/*** Scrolling ***/
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
/* Scroll left */
void gray_scroll_left(int count)
{
unsigned char *data, *data_end;
int length, blank;
if ((unsigned)count >= (unsigned)_gray_info.width)
return;
data = _gray_info.cur_buffer;
data_end = data + MULU16(_gray_info.width, _gray_info.height);
length = _gray_info.width - count;
blank = (_gray_info.drawmode & DRMODE_INVERSEVID) ?
_gray_info.fg_index : _gray_info.bg_index;
do
{
_gray_rb->memmove(data, data + count, length);
_gray_rb->memset(data + length, blank, count);
data += _gray_info.width;
}
while (data < data_end);
}
/* Scroll right */
void gray_scroll_right(int count)
{
unsigned char *data, *data_end;
int length, blank;
if ((unsigned)count >= (unsigned)_gray_info.width)
return;
data = _gray_info.cur_buffer;
data_end = data + MULU16(_gray_info.width, _gray_info.height);
length = _gray_info.width - count;
blank = (_gray_info.drawmode & DRMODE_INVERSEVID) ?
_gray_info.fg_index : _gray_info.bg_index;
do
{
_gray_rb->memmove(data + count, data, length);
_gray_rb->memset(data, blank, count);
data += _gray_info.width;
}
while (data < data_end);
}
/* Scroll up */
void gray_scroll_up(int count)
{
long shift, length;
int blank;
if ((unsigned)count >= (unsigned)_gray_info.height)
return;
shift = MULU16(_gray_info.width, count);
length = MULU16(_gray_info.width, _gray_info.height - count);
blank = (_gray_info.drawmode & DRMODE_INVERSEVID) ?
_gray_info.fg_index : _gray_info.bg_index;
_gray_rb->memmove(_gray_info.cur_buffer, _gray_info.cur_buffer + shift,
length);
_gray_rb->memset(_gray_info.cur_buffer + length, blank, shift);
}
/* Scroll down */
void gray_scroll_down(int count)
{
long shift, length;
int blank;
if ((unsigned)count >= (unsigned)_gray_info.height)
return;
shift = MULU16(_gray_info.width, count);
length = MULU16(_gray_info.width, _gray_info.height - count);
blank = (_gray_info.drawmode & DRMODE_INVERSEVID) ?
_gray_info.fg_index : _gray_info.bg_index;
_gray_rb->memmove(_gray_info.cur_buffer + shift, _gray_info.cur_buffer,
length);
_gray_rb->memset(_gray_info.cur_buffer, blank, shift);
}
#else /* LCD_PIXELFORMAT == VERTICAL_PACKING */
/* Scroll left */
void gray_scroll_left(int count)
{
@ -44,7 +135,8 @@ void gray_scroll_left(int count)
blank = (_gray_info.drawmode & DRMODE_INVERSEVID) ?
_gray_info.fg_index : _gray_info.bg_index;
_gray_rb->memmove(_gray_info.cur_buffer, _gray_info.cur_buffer + shift, length);
_gray_rb->memmove(_gray_info.cur_buffer, _gray_info.cur_buffer + shift,
length);
_gray_rb->memset(_gray_info.cur_buffer + length, blank, shift);
}
@ -62,7 +154,8 @@ void gray_scroll_right(int count)
blank = (_gray_info.drawmode & DRMODE_INVERSEVID) ?
_gray_info.fg_index : _gray_info.bg_index;
_gray_rb->memmove(_gray_info.cur_buffer + shift, _gray_info.cur_buffer, length);
_gray_rb->memmove(_gray_info.cur_buffer + shift, _gray_info.cur_buffer,
length);
_gray_rb->memset(_gray_info.cur_buffer, blank, shift);
}
@ -113,6 +206,7 @@ void gray_scroll_down(int count)
}
while (data < data_end);
}
#endif /* LCD_PIXELFORMAT */
/*** Unbuffered scrolling functions ***/
@ -148,6 +242,260 @@ void gray_ub_scroll_down(int count)
#else /* !SIMULATOR */
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
/* Scroll left */
void gray_ub_scroll_left(int count)
{
int shift, length;
unsigned char *ptr, *ptr_end;
if ((unsigned) count >= (unsigned) _gray_info.width)
return;
shift = count >> 3;
count &= 7;
if (shift)
{
length = _gray_info.bwidth - shift;
ptr = _gray_info.plane_data;
ptr_end = ptr + _gray_info.plane_size;
/* Scroll row by row to minimize flicker */
do
{
unsigned char *ptr_row = ptr;
unsigned char *row_end = ptr_row
+ MULU16(_gray_info.plane_size, _gray_info.depth);
do
{
_gray_rb->memmove(ptr_row, ptr_row + shift, length);
_gray_rb->memset(ptr_row + length, 0, shift);
ptr_row += _gray_info.plane_size;
}
while (ptr_row < row_end);
ptr += _gray_info.bwidth;
}
while (ptr < ptr_end);
}
if (count)
{
asm (
"mov r4, %[high] \n"
".sl_rloop: \n"
"mov r5, %[addr] \n"
"mov r2, %[dpth] \n"
".sl_oloop: \n"
"mov r6, r5 \n"
"mov r3, %[cols] \n"
"mov r1, #0 \n"
".sl_iloop: \n"
"mov r1, r1, lsr #8 \n"
"ldrb r0, [r6, #-1]! \n"
"orr r1, r1, r0, lsl %[cnt] \n"
"strb r1, [r6] \n"
"subs r3, r3, #1 \n"
"bne .sl_iloop \n"
"add r5, r5, %[psiz] \n"
"subs r2, r2, #1 \n"
"bne .sl_oloop \n"
"add %[addr],%[addr],%[bwid] \n"
"subs r4, r4, #1 \n"
"bne .sl_rloop \n"
: /* outputs */
: /* inputs */
[dpth]"r"(_gray_info.depth),
[high]"r"(_gray_info.height),
[bwid]"r"(_gray_info.bwidth),
[cols]"r"(_gray_info.bwidth - shift),
[psiz]"r"(_gray_info.plane_size),
[addr]"r"(_gray_info.plane_data + _gray_info.bwidth - shift),
[cnt] "r"(count)
: /* clobbers */
"r0", "r1", "r2", "r3", "r4", "r5", "r6"
);
}
}
/* Scroll right */
void gray_ub_scroll_right(int count)
{
int shift, length;
unsigned char *ptr, *ptr_end;
if ((unsigned) count >= (unsigned) _gray_info.width)
return;
shift = count >> 3;
count &= 7;
if (shift)
{
length = _gray_info.bwidth - shift;
ptr = _gray_info.plane_data;
ptr_end = ptr + _gray_info.plane_size;
/* Scroll row by row to minimize flicker */
do
{
unsigned char *ptr_row = ptr;
unsigned char *row_end = ptr_row
+ MULU16(_gray_info.plane_size, _gray_info.depth);
do
{
_gray_rb->memmove(ptr_row + shift, ptr_row, length);
_gray_rb->memset(ptr_row, 0, shift);
ptr_row += _gray_info.plane_size;
}
while (ptr_row < row_end);
ptr += _gray_info.bwidth;
}
while (ptr < ptr_end);
}
if (count)
{
asm (
"mov r4, %[high] \n"
".sr_rloop: \n"
"mov r5, %[addr] \n"
"mov r2, %[dpth] \n"
".sr_oloop: \n"
"mov r6, r5 \n"
"mov r3, %[cols] \n"
"mov r1, #0 \n"
".sr_iloop: \n"
"ldrb r0, [r6] \n"
"orr r1, r0, r1, lsl #8 \n"
"mov r0, r1, lsr %[cnt] \n"
"strb r0, [r6], #1 \n"
"subs r3, r3, #1 \n"
"bne .sr_iloop \n"
"add r5, r5, %[psiz] \n"
"subs r2, r2, #1 \n"
"bne .sr_oloop \n"
"add %[addr],%[addr],%[bwid] \n"
"subs r4, r4, #1 \n"
"bne .sr_rloop \n"
: /* outputs */
: /* inputs */
[dpth]"r"(_gray_info.depth),
[high]"r"(_gray_info.height),
[bwid]"r"(_gray_info.bwidth),
[cols]"r"(_gray_info.bwidth - shift),
[psiz]"r"(_gray_info.plane_size),
[addr]"r"(_gray_info.plane_data + shift),
[cnt] "r"(count)
: /* clobbers */
"r0", "r1", "r2", "r3", "r4", "r5", "r6"
);
}
}
/* Scroll up */
void gray_ub_scroll_up(int count)
{
long blockshift;
unsigned char *ptr, *ptr_end1, *ptr_end2;
if ((unsigned) count >= (unsigned) _gray_info.height)
return;
blockshift = MULU16(_gray_info.bwidth, count);
ptr = _gray_info.plane_data;
ptr_end2 = ptr + _gray_info.plane_size;
ptr_end1 = ptr_end2 - blockshift;
/* Scroll row by row to minimize flicker */
do
{
unsigned char *ptr_row = ptr;
unsigned char *row_end = ptr_row
+ MULU16(_gray_info.plane_size, _gray_info.depth);
if (ptr < ptr_end1)
{
do
{
_gray_rb->memcpy(ptr_row, ptr_row + blockshift,
_gray_info.bwidth);
ptr_row += _gray_info.plane_size;
}
while (ptr_row < row_end);
}
else
{
do
{
_gray_rb->memset(ptr_row, 0, _gray_info.bwidth);
ptr_row += _gray_info.plane_size;
}
while (ptr_row < row_end);
}
ptr += _gray_info.bwidth;
}
while (ptr < ptr_end2);
}
/* Scroll down */
void gray_ub_scroll_down(int count)
{
long blockshift;
unsigned char *ptr, *ptr_end1, *ptr_end2;
if ((unsigned) count >= (unsigned) _gray_info.height)
return;
blockshift = MULU16(_gray_info.bwidth, count);
ptr_end2 = _gray_info.plane_data;
ptr_end1 = ptr_end2 + blockshift;
ptr = ptr_end2 + _gray_info.plane_size;
/* Scroll row by row to minimize flicker */
do
{
unsigned char *ptr_row, *row_end;
ptr -= _gray_info.bwidth;
ptr_row = ptr;
row_end = ptr_row + MULU16(_gray_info.plane_size, _gray_info.depth);
if (ptr >= ptr_end1)
{
do
{
_gray_rb->memcpy(ptr_row, ptr_row - blockshift,
_gray_info.bwidth);
ptr_row += _gray_info.plane_size;
}
while (ptr_row < row_end);
}
else
{
do
{
_gray_rb->memset(ptr_row, 0, _gray_info.bwidth);
ptr_row += _gray_info.plane_size;
}
while (ptr_row < row_end);
}
}
while (ptr > ptr_end2);
}
#else /* LCD_PIXELFORMAT == VERTICAL_PACKING */
/* Scroll left */
void gray_ub_scroll_left(int count)
{
@ -222,8 +570,8 @@ void gray_ub_scroll_up(int count)
if ((unsigned) count >= (unsigned) _gray_info.height)
return;
shift = count >> _PBLOCK_EXP;
count &= (_PBLOCK-1);
shift = count >> 3;
count &= 7;
if (shift)
{
@ -263,7 +611,7 @@ void gray_ub_scroll_up(int count)
}
if (count)
{
#if (CONFIG_CPU == SH7034) && (LCD_DEPTH == 1)
#if CONFIG_CPU == SH7034
/* scroll column by column to minimize flicker */
asm (
"mov #0,r6 \n" /* x = 0 */
@ -345,7 +693,7 @@ void gray_ub_scroll_up(int count)
: /* clobbers */
"r0", "r1", "r2", "r3", "r4", "r5", "r6"
);
#elif defined(CPU_COLDFIRE) && (LCD_DEPTH == 2)
#elif defined(CPU_COLDFIRE)
/* scroll column by column to minimize flicker */
asm (
"move.l %[wide],%%d4\n" /* columns = width */
@ -406,8 +754,8 @@ void gray_ub_scroll_down(int count)
if ((unsigned) count >= (unsigned) _gray_info.height)
return;
shift = count >> _PBLOCK_EXP;
count &= (_PBLOCK-1);
shift = count >> 3;
count &= 7;
if (shift)
{
@ -448,7 +796,7 @@ void gray_ub_scroll_down(int count)
}
if (count)
{
#if (CONFIG_CPU == SH7034) && (LCD_DEPTH == 1)
#if CONFIG_CPU == SH7034
/* scroll column by column to minimize flicker */
asm (
"mov #0,r6 \n" /* x = 0 */
@ -529,7 +877,7 @@ void gray_ub_scroll_down(int count)
: /* clobbers */
"r0", "r1", "r2", "r3", "r4", "r5", "r6"
);
#elif defined(CPU_COLDFIRE) && (LCD_DEPTH == 2)
#elif defined(CPU_COLDFIRE)
/* scroll column by column to minimize flicker */
asm (
"move.l %[wide],%%d4\n" /* columns = width */
@ -576,7 +924,8 @@ void gray_ub_scroll_down(int count)
#endif
}
}
#endif /* LCD_PIXELFORMAT */
#endif /* !SIMULATOR */
#endif /* HAVE_LCD_BITMAP */

2
apps/plugins/mandelbrot.c
View file

@ -487,7 +487,7 @@ enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
/* initialize the grayscale buffer:
* 8 bitplanes for 9 shades of gray.*/
grayscales = gray_init(rb, gbuf, gbuf_size, false, LCD_WIDTH, LCD_HEIGHT/8,
grayscales = gray_init(rb, gbuf, gbuf_size, false, LCD_WIDTH, LCD_HEIGHT,
8, 0, NULL) + 1;
if (grayscales != 9) {
rb->snprintf(buff, sizeof(buff), "%d", grayscales);

2
apps/plugins/plasma.c
View file

@ -243,7 +243,7 @@ int main(void)
/* get the remainder of the plugin buffer */
gbuf = (unsigned char *) rb->plugin_get_buffer(&gbuf_size);
gray_init(rb, gbuf, gbuf_size, false, LCD_WIDTH, LCD_HEIGHT/8, 32, 2<<8, NULL);
gray_init(rb, gbuf, gbuf_size, false, LCD_WIDTH, LCD_HEIGHT, 32, 2<<8, NULL);
/* switch on grayscale overlay */
gray_show(true);
#endif

3
firmware/SOURCES
View file

@ -87,7 +87,8 @@ drivers/lcd-h100-remote.c
drivers/lcd-remote-2bit-vi.c
#endif
#endif
#if CONFIG_LCD==LCD_IPODNANO || CONFIG_LCD==LCD_IPODCOLOR || CONFIG_LCD == LCD_IPOD2BPP
#if CONFIG_LCD==LCD_IPODNANO || CONFIG_LCD==LCD_IPODCOLOR \
|| CONFIG_LCD == LCD_IPOD2BPP || CONFIG_LCD == LCD_IPODMINI
drivers/lcd-ipod.c
#endif
#if CONFIG_LCD==LCD_IPODVIDEO

2
firmware/drivers/lcd-ipod.c
View file

@ -36,7 +36,7 @@ static inline bool timer_check(int clock_start, int usecs)
return ((int)(USEC_TIMER - clock_start)) >= usecs;
}
#if (CONFIG_LCD == LCD_IPOD2BPP)
#if (CONFIG_LCD == LCD_IPOD2BPP) || (CONFIG_LCD == LCD_IPODMINI)
/*** hardware configuration ***/

2
firmware/export/config-ipodmini.h
View file

@ -82,7 +82,7 @@
/* Define this to the CPU frequency */
#define CPU_FREQ 11289600
#define CONFIG_LCD LCD_IPOD2BPP
#define CONFIG_LCD LCD_IPODMINI
/* Offset ( in the firmware file's header ) to the file length */
#define FIRMWARE_OFFSET_FILE_LENGTH 0

2
firmware/export/config-ipodmini2g.h
View file

@ -85,7 +85,7 @@
/* Define this to the CPU frequency */
#define CPU_FREQ 11289600
#define CONFIG_LCD LCD_IPOD2BPP
#define CONFIG_LCD LCD_IPODMINI
/* Offset ( in the firmware file's header ) to the file length */
#define FIRMWARE_OFFSET_FILE_LENGTH 0

7
firmware/export/config.h
View file

@ -89,9 +89,10 @@
#define LCD_IPODCOLOR 6 /* as used by iPod Color/Photo */
#define LCD_IPODNANO 7 /* as used by iPod Nano */
#define LCD_IPODVIDEO 8 /* as used by iPod Video */
#define LCD_IPOD2BPP 9 /* as used by all greyscale iPods */
#define LCD_IFP7XX 10 /* as used by iRiver iFP 7xx/8xx */
#define LCD_GIGABEAT 11
#define LCD_IPOD2BPP 9 /* as used by all fullsize greyscale iPods */
#define LCD_IPODMINI 10 /* as used by iPod Mini g1/g2 */
#define LCD_IFP7XX 11 /* as used by iRiver iFP 7xx/8xx */
#define LCD_GIGABEAT 12
/* LCD_PIXELFORMAT */
#define HORIZONTAL_PACKING 1