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All-new greyscale library, replacing the old one. Features: (1) Drawing/updating is faster than the old grayscale lib at full depth. (2) Always 129 shades instead of 2..33 shades. (3) No graininess caused by frequent updates (mpegplayer, doom, ...). (4) Needs less memory than the old grayscale lib at full depth. * The tradeoff is slightly higher CPU load in the ISR (frames are calculated 'live') and an extra function in the core. * Ported all plugins which used the graylib to use the new one. * Some slight optimisations for archos and H1x0 LCD update.

Browse source 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15998 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2008-01-04 23:42:38 +00:00
parent d3586837fa
commit feb5b15e9b
35 changed files with 2872 additions and 357 deletions
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4
apps/plugins/lib/SOURCES
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@ -8,6 +8,10 @@ gray_core.c
gray_draw.c
gray_parm.c
gray_scroll.c
grey_core.c
grey_draw.c
grey_parm.c
grey_scroll.c
#endif
highscore.c
#ifndef SIMULATOR

166
apps/plugins/lib/grey.h Normal file
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@ -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__ */

767
apps/plugins/lib/grey_core.c Normal file
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@ -0,0 +1,767 @@
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* New greyscale framework
* Core & miscellaneous functions
*
* 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.
*
****************************************************************************/
#include "plugin.h"
#include "grey.h"
#if defined(CPU_PP) && defined(HAVE_ADJUSTABLE_CPU_FREQ)
#define NEED_BOOST
#endif
/* Global variables */
struct plugin_api *_grey_rb = NULL; /* global api struct pointer */
struct _grey_info _grey_info; /* global info structure */
#ifndef SIMULATOR
#if CONFIG_LCD == LCD_SSD1815 || CONFIG_LCD == LCD_IFP7XX
/* measured and interpolated curve */
/* TODO: check for iFP */
static const unsigned char lcdlinear[256] = {
0, 3, 5, 8, 11, 13, 16, 18,
21, 23, 26, 28, 31, 33, 36, 38,
40, 42, 45, 47, 49, 51, 53, 55,
57, 59, 60, 62, 64, 66, 67, 69,
70, 72, 73, 74, 76, 77, 78, 79,
81, 82, 83, 84, 85, 86, 87, 88,
88, 89, 90, 91, 92, 92, 93, 94,
95, 95, 96, 97, 97, 98, 99, 99,
100, 101, 102, 102, 103, 104, 104, 105,
106, 106, 107, 107, 108, 109, 109, 110,
111, 111, 112, 113, 113, 114, 114, 115,
116, 116, 117, 117, 118, 119, 119, 120,
120, 121, 121, 122, 122, 123, 123, 124,
124, 125, 125, 126, 126, 127, 127, 128,
128, 128, 129, 129, 130, 130, 131, 131,
132, 132, 133, 133, 133, 134, 134, 135,
135, 136, 136, 137, 137, 138, 138, 138,
139, 139, 140, 140, 141, 141, 142, 142,
143, 143, 144, 144, 145, 145, 146, 146,
147, 147, 148, 148, 148, 149, 149, 150,
150, 151, 151, 152, 152, 153, 153, 153,
154, 154, 155, 155, 156, 156, 157, 157,
158, 158, 158, 159, 159, 160, 160, 161,
161, 162, 162, 163, 163, 164, 164, 165,
165, 166, 167, 167, 168, 168, 169, 169,
170, 171, 171, 172, 173, 173, 174, 175,
176, 176, 177, 178, 179, 180, 181, 181,
182, 183, 184, 185, 186, 188, 189, 190,
191, 192, 194, 195, 196, 198, 199, 201,
202, 204, 205, 207, 209, 211, 213, 215,
217, 219, 222, 224, 226, 229, 231, 234,
236, 239, 242, 244, 247, 250, 252, 255
};
#elif CONFIG_LCD == LCD_S1D15E06
/* measured and interpolated curve */
static const unsigned char lcdlinear[256] = {
0, 5, 11, 16, 21, 27, 32, 37,
42, 47, 51, 56, 60, 64, 68, 72,
75, 78, 81, 84, 87, 89, 91, 93,
95, 96, 98, 99, 101, 102, 103, 104,
105, 106, 107, 108, 109, 110, 111, 111,
112, 113, 113, 114, 115, 115, 116, 117,
117, 118, 118, 119, 119, 120, 120, 121,
121, 122, 122, 123, 123, 124, 124, 125,
125, 126, 126, 127, 127, 127, 128, 128,
129, 129, 130, 130, 131, 131, 132, 132,
133, 133, 134, 134, 135, 135, 136, 136,
137, 137, 138, 138, 138, 139, 139, 140,
140, 141, 141, 141, 142, 142, 143, 143,
143, 144, 144, 145, 145, 145, 146, 146,
146, 147, 147, 147, 148, 148, 149, 149,
149, 150, 150, 150, 151, 151, 151, 152,
152, 153, 153, 153, 154, 154, 155, 155,
155, 156, 156, 157, 157, 157, 158, 158,
159, 159, 159, 160, 160, 161, 161, 162,
162, 162, 163, 163, 164, 164, 164, 165,
165, 166, 166, 167, 167, 167, 168, 168,
169, 169, 170, 170, 170, 171, 171, 172,
172, 173, 173, 174, 174, 175, 175, 176,
176, 177, 177, 178, 178, 179, 179, 180,
180, 181, 182, 182, 183, 184, 184, 185,
186, 186, 187, 188, 188, 189, 190, 191,
191, 192, 193, 194, 195, 196, 196, 197,
198, 199, 200, 201, 202, 203, 204, 205,
206, 207, 208, 209, 210, 211, 213, 214,
215, 216, 218, 219, 220, 222, 223, 225,
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 */
static const unsigned char lcdlinear[256] = {
0, 16, 23, 28, 32, 36, 39, 42,
45, 48, 50, 53, 55, 58, 60, 62,
64, 66, 68, 70, 71, 73, 75, 77,
78, 80, 81, 83, 84, 86, 87, 89,
90, 92, 93, 94, 96, 97, 98, 100,
101, 102, 103, 105, 106, 107, 108, 109,
111, 112, 113, 114, 115, 116, 117, 118,
119, 121, 122, 123, 124, 125, 126, 127,
128, 129, 130, 131, 132, 133, 134, 135,
135, 136, 137, 138, 139, 140, 141, 142,
143, 144, 145, 145, 146, 147, 148, 149,
150, 151, 151, 152, 153, 154, 155, 156,
156, 157, 158, 159, 160, 160, 161, 162,
163, 164, 164, 165, 166, 167, 167, 168,
169, 170, 170, 171, 172, 173, 173, 174,
175, 176, 176, 177, 178, 179, 179, 180,
181, 181, 182, 183, 183, 184, 185, 186,
186, 187, 188, 188, 189, 190, 190, 191,
192, 192, 193, 194, 194, 195, 196, 196,
197, 198, 198, 199, 199, 200, 201, 201,
202, 203, 203, 204, 204, 205, 206, 206,
207, 208, 208, 209, 209, 210, 211, 211,
212, 212, 213, 214, 214, 215, 215, 216,
217, 217, 218, 218, 219, 220, 220, 221,
221, 222, 222, 223, 224, 224, 225, 225,
226, 226, 227, 228, 228, 229, 229, 230,
230, 231, 231, 232, 233, 233, 234, 234,
235, 235, 236, 236, 237, 237, 238, 238,
239, 240, 240, 241, 241, 242, 242, 243,
243, 244, 244, 245, 245, 246, 246, 247,
247, 248, 248, 249, 249, 250, 250, 251,
251, 252, 252, 253, 253, 254, 254, 255
};
#endif /* SIMULATOR */
/* Prototypes */
static inline void _deferred_update(void) __attribute__ ((always_inline));
static int exp_s16p16(int x);
static int log_s16p16(int x);
static void grey_screendump_hook(int fd);
#ifdef SIMULATOR
static unsigned long _grey_get_pixel(int x, int y);
#else
static void _timer_isr(void);
#endif
/* Update LCD areas not covered by the greyscale overlay */
static inline void _deferred_update(void)
{
int x1 = MAX(_grey_info.x, 0);
int x2 = MIN(_grey_info.x + _grey_info.width, LCD_WIDTH);
int y1 = MAX(_grey_info.y, 0);
int y2 = MIN(_grey_info.y + _grey_info.height, LCD_HEIGHT);
if (y1 > 0) /* refresh part above overlay, full width */
_grey_rb->lcd_update_rect(0, 0, LCD_WIDTH, y1);
if (y2 < LCD_HEIGHT) /* refresh part below overlay, full width */
_grey_rb->lcd_update_rect(0, y2, LCD_WIDTH, LCD_HEIGHT - y2);
if (x1 > 0) /* refresh part to the left of overlay */
_grey_rb->lcd_update_rect(0, y1, x1, y2 - y1);
if (x2 < LCD_WIDTH) /* refresh part to the right of overlay */
_grey_rb->lcd_update_rect(x2, y1, LCD_WIDTH - x2, y2 - y1);
}
#ifndef SIMULATOR
/* Timer interrupt handler: display next frame */
static void _timer_isr(void)
{
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
_grey_rb->lcd_grey_phase_blit(_grey_info.data, _grey_info.bx, _grey_info.y,
_grey_info.bwidth, _grey_info.height,
_grey_info.width);
#else
_grey_rb->lcd_grey_phase_blit(_grey_info.data, _grey_info.x, _grey_info.by,
_grey_info.width, _grey_info.bheight,
_grey_info.width);
#endif
if (_grey_info.flags & _GREY_DEFERRED_UPDATE) /* lcd_update() requested? */
{
_deferred_update();
_grey_info.flags &= ~_GREY_DEFERRED_UPDATE; /* clear request */
}
}
#endif /* !SIMULATOR */
/* fixed point exp() */
static int exp_s16p16(int x)
{
int t;
int y = 0x00010000;
if (x < 0) x += 0xb1721, y >>= 16;
t = x - 0x58b91; if (t >= 0) x = t, y <<= 8;
t = x - 0x2c5c8; if (t >= 0) x = t, y <<= 4;
t = x - 0x162e4; if (t >= 0) x = t, y <<= 2;
t = x - 0x0b172; if (t >= 0) x = t, y <<= 1;
t = x - 0x067cd; if (t >= 0) x = t, y += y >> 1;
t = x - 0x03920; if (t >= 0) x = t, y += y >> 2;
t = x - 0x01e27; if (t >= 0) x = t, y += y >> 3;
t = x - 0x00f85; if (t >= 0) x = t, y += y >> 4;
t = x - 0x007e1; if (t >= 0) x = t, y += y >> 5;
t = x - 0x003f8; if (t >= 0) x = t, y += y >> 6;
t = x - 0x001fe; if (t >= 0) x = t, y += y >> 7;
y += ((y >> 8) * x) >> 8;
return y;
}
/* fixed point log() */
static int log_s16p16(int x)
{
int t;
int y = 0xa65af;
if (x < 0x00008000) x <<=16, y -= 0xb1721;
if (x < 0x00800000) x <<= 8, y -= 0x58b91;
if (x < 0x08000000) x <<= 4, y -= 0x2c5c8;
if (x < 0x20000000) x <<= 2, y -= 0x162e4;
if (x < 0x40000000) x <<= 1, y -= 0x0b172;
t = x + (x >> 1); if ((t & 0x80000000) == 0) x = t, y -= 0x067cd;
t = x + (x >> 2); if ((t & 0x80000000) == 0) x = t, y -= 0x03920;
t = x + (x >> 3); if ((t & 0x80000000) == 0) x = t, y -= 0x01e27;
t = x + (x >> 4); if ((t & 0x80000000) == 0) x = t, y -= 0x00f85;
t = x + (x >> 5); if ((t & 0x80000000) == 0) x = t, y -= 0x007e1;
t = x + (x >> 6); if ((t & 0x80000000) == 0) x = t, y -= 0x003f8;
t = x + (x >> 7); if ((t & 0x80000000) == 0) x = t, y -= 0x001fe;
x = 0x80000000 - x;
y -= x >> 15;
return y;
}
/* Initialise the framework and prepare the greyscale display buffer
arguments:
newrb = pointer to plugin api
gbuf = pointer to the memory area to use (e.g. plugin buffer)
gbuf_size = max usable size of the buffer
buffered = use chunky pixel buffering?
This allows to use all drawing functions, but needs more
memory. Unbuffered operation provides only a subset of
drawing functions. (only grey_bitmap drawing and scrolling)
width = width in pixels (1..LCD_WIDTH)
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 4 or 8.
result:
true on success, false on failure
If you need info about the memory taken by the greyscale buffer, supply a
long* as the last parameter. This long will then contain the number of bytes
used. The total memory needed can be calculated as follows:
total_mem =
width * height * 2 [grey display data]
+ buffered ? (width * height) : 0 [chunky buffer]
+ 0..3 [alignment]
The function is authentic regarding memory usage on the simulator, even
if it doesn't use all of the allocated memory. */
bool grey_init(struct plugin_api* newrb, unsigned char *gbuf, long gbuf_size,
bool buffered, int width, int height, long *buf_taken)
{
int bdim, i;
long plane_size, buftaken;
unsigned data;
#ifndef SIMULATOR
struct grey_data *grey_data, *grey_end;
#endif
_grey_rb = newrb;
if ((unsigned) width > LCD_WIDTH
|| (unsigned) height > LCD_HEIGHT)
return false;
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
bdim = (width + 7) >> 3;
width = bdim << 3;
#else /* vertical packing */
#if LCD_DEPTH == 1
bdim = (height + 7) >> 3;
height = bdim << 3;
#elif LCD_DEPTH == 2
bdim = (height + 3) >> 2;
height = bdim << 2;
#endif
#endif
/* the buffer has to be long aligned */
buftaken = (-(long)gbuf) & 3;
gbuf += buftaken;
plane_size = _GREY_MULUQ(width, height);
if (buffered) /* chunky buffer */
{
buftaken += plane_size;
_grey_info.buffer = gbuf;
gbuf += plane_size;
}
buftaken += sizeof(struct grey_data) * plane_size;
if (buftaken > gbuf_size)
return false;
#ifdef SIMULATOR
_grey_info.buffer = gbuf;
#else
grey_data = (struct grey_data *)gbuf;
grey_end = grey_data + plane_size;
_grey_info.data = grey_data;
while (grey_data < grey_end)
{
grey_data->phase = _grey_rb->rand() & 0xff;
grey_data->value = 128; /* init to white */
grey_data++;
}
#endif
_grey_info.x = 0;
_grey_info.y = 0;
_grey_info.width = width;
_grey_info.height = height;
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
_grey_info.bx = 0;
_grey_info.bwidth = bdim;
#else
_grey_info.by = 0;
_grey_info.bheight = bdim;
#endif
_grey_info.flags = 0;
_grey_info.fg_val = 0;
_grey_info.bg_val = 128;
_grey_info.fg_brightness = 0;
_grey_info.bg_brightness = 255;
_grey_info.drawmode = DRMODE_SOLID;
_grey_info.curfont = FONT_SYSFIXED;
/* precalculate the value -> pattern index conversion table, taking
linearisation and gamma correction into account */
for (i = 0; i < 256; i++)
{
data = exp_s16p16(((2<<8) * log_s16p16(i * 257 + 1)) >> 8) + 128;
data = (data - (data >> 8)) >> 8; /* approx. data /= 257 */
data = (lcdlinear[data] << 7) + 127;
_grey_info.gvalue[i] = (data + (data >> 8)) >> 8;
/* approx. data / 255 */
}
if (buf_taken) /* caller requested info about space taken */
*buf_taken = buftaken;
return true;
}
/* Release the greyscale display buffer and the library
DO CALL either this function or at least grey_show_display(false)
before you exit, otherwise nasty things may happen. */
void grey_release(void)
{
grey_show(false);
}
/* Switch the greyscale overlay on or off
DO NOT call lcd_update() or any other api function that directly accesses
the lcd while the greyscale overlay is running! If you need to do
lcd_update() to update something outside the greyscale overlay area, use
grey_deferred_update() instead.
Other functions to avoid are:
lcd_blit() (obviously), lcd_update_rect(), lcd_set_contrast(),
lcd_set_invert_display(), lcd_set_flip() */
void grey_show(bool enable)
{
if (enable && !(_grey_info.flags & _GREY_RUNNING))
{
_grey_info.flags |= _GREY_RUNNING;
#ifdef SIMULATOR
_grey_rb->sim_lcd_ex_init(129, _grey_get_pixel);
grey_update();
#else /* !SIMULATOR */
#ifdef NEED_BOOST
_grey_rb->cpu_boost(true);
#endif
#if CONFIG_LCD == LCD_SSD1815
_grey_rb->timer_register(1, NULL, TIMER_FREQ / 67, 1, _timer_isr);
#elif CONFIG_LCD == LCD_S1D15E06
_grey_rb->timer_register(1, NULL, TIMER_FREQ / 70, 1, _timer_isr);
#elif CONFIG_LCD == LCD_IPOD2BPP
#ifdef IPOD_1G2G
_grey_rb->timer_register(1, NULL, TIMER_FREQ / 95, 1, _timer_isr); /* verified */
#elif defined IPOD_3G
_grey_rb->timer_register(1, NULL, TIMER_FREQ / 87, 1, _timer_isr); /* verified */
#else
/* FIXME: verify value */
_grey_rb->timer_register(1, NULL, TIMER_FREQ / 80, 1, _timer_isr);
#endif
#elif CONFIG_LCD == LCD_IPODMINI
_grey_rb->timer_register(1, NULL, TIMER_FREQ / 88, 1, _timer_isr);
#elif CONFIG_LCD == LCD_IFP7XX
_grey_rb->timer_register(1, NULL, TIMER_FREQ / 83, 1, _timer_isr);
#endif /* CONFIG_LCD */
#endif /* !SIMULATOR */
_grey_rb->screen_dump_set_hook(grey_screendump_hook);
}
else if (!enable && (_grey_info.flags & _GREY_RUNNING))
{
#ifdef SIMULATOR
_grey_rb->sim_lcd_ex_init(0, NULL);
#else
_grey_rb->timer_unregister();
#ifdef NEED_BOOST
_grey_rb->cpu_boost(false);
#endif
#endif
_grey_info.flags &= ~_GREY_RUNNING;
_grey_rb->screen_dump_set_hook(NULL);
_grey_rb->lcd_update(); /* restore whatever there was before */
}
}
#ifdef SIMULATOR
/* Callback function for grey_update_rect() to read a pixel from the greybuffer.
Note that x and y are in LCD coordinates, not greybuffer coordinates! */
static unsigned long _grey_get_pixel(int x, int y)
{
return _grey_info.buffer[(y - _grey_info.y) * _grey_info.width
+ x - _grey_info.x] + (1 << LCD_DEPTH);
}
/* Update a rectangular area of the greyscale overlay */
void grey_update_rect(int x, int y, int width, int height)
{
if (x + width > _grey_info.width)
width = _grey_info.width - x;
if (y + height > _grey_info.height)
height = _grey_info.height - y;
x += _grey_info.x;
y += _grey_info.y;
if (x + width > LCD_WIDTH)
width = LCD_WIDTH - x;
if (y + height > LCD_HEIGHT)
height = LCD_HEIGHT - y;
_grey_rb->sim_lcd_ex_update_rect(x, y, width, height);
}
#else /* !SIMULATOR */
void grey_update_rect(int x, int y, int width, int height)
{
unsigned char *src;
if ((width <= 0) || (height <= 0))
return; /* nothing to do */
if (y + height > _grey_info.height)
height = _grey_info.height - y;
if (x + width > _grey_info.width)
width = _grey_info.width - x;
src = _grey_info.buffer + _GREY_MULUQ(_grey_info.width, y) + x;
do
{
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
int idx = _GREY_MULUQ(_grey_info.width, y) + x;
#else
#if LCD_DEPTH == 1
int idx = _GREY_MULUQ(_grey_info.width, y & ~7) + (x << 3) + (~y & 7);
#elif LCD_DEPTH == 2
int idx = _GREY_MULUQ(_grey_info.width, y & ~3) + (x << 2) + (~y & 3);
#endif
#endif /* LCD_PIXELFORMAT */
unsigned char *dst_row = &_grey_info.data[idx].value;
unsigned char *src_row = src;
unsigned char *src_end = src + width;
do
{
*dst_row = *src_row++;
dst_row += _GREY_X_ADVANCE;
}
while (src_row < src_end);
y++;
src += _grey_info.width;
}
while (--height > 0);
}
#endif /* !SIMULATOR */
/* Update the whole greyscale overlay */
void grey_update(void)
{
grey_update_rect(0, 0, _grey_info.width, _grey_info.height);
}
/* Do an lcd_update() to show changes done by rb->lcd_xxx() functions
(in areas of the screen not covered by the greyscale overlay). */
void grey_deferred_lcd_update(void)
{
if (_grey_info.flags & _GREY_RUNNING)
{
#ifdef SIMULATOR
_deferred_update();
#else
_grey_info.flags |= _GREY_DEFERRED_UPDATE;
#endif
}
else
_grey_rb->lcd_update();
}
/*** Screenshot ***/
#define BMP_FIXEDCOLORS (1 << LCD_DEPTH)
#define BMP_VARCOLORS 129
#define BMP_NUMCOLORS (BMP_FIXEDCOLORS + BMP_VARCOLORS)
#define BMP_BPP 8
#define BMP_LINESIZE ((LCD_WIDTH + 3) & ~3)
#define BMP_HEADERSIZE (54 + 4 * BMP_NUMCOLORS)
#define BMP_DATASIZE (BMP_LINESIZE * LCD_HEIGHT)
#define BMP_TOTALSIZE (BMP_HEADERSIZE + BMP_DATASIZE)
#define LE16_CONST(x) (x)&0xff, ((x)>>8)&0xff
#define LE32_CONST(x) (x)&0xff, ((x)>>8)&0xff, ((x)>>16)&0xff, ((x)>>24)&0xff
static const unsigned char bmpheader[] =
{
0x42, 0x4d, /* 'BM' */
LE32_CONST(BMP_TOTALSIZE), /* Total file size */
0x00, 0x00, 0x00, 0x00, /* Reserved */
LE32_CONST(BMP_HEADERSIZE), /* Offset to start of pixel data */
0x28, 0x00, 0x00, 0x00, /* Size of (2nd) header */
LE32_CONST(LCD_WIDTH), /* Width in pixels */
LE32_CONST(LCD_HEIGHT), /* Height in pixels */
0x01, 0x00, /* Number of planes (always 1) */
LE16_CONST(BMP_BPP), /* Bits per pixel 1/4/8/16/24 */
0x00, 0x00, 0x00, 0x00, /* Compression mode, 0 = none */
LE32_CONST(BMP_DATASIZE), /* Size of bitmap data */
0xc4, 0x0e, 0x00, 0x00, /* Horizontal resolution (pixels/meter) */
0xc4, 0x0e, 0x00, 0x00, /* Vertical resolution (pixels/meter) */
LE32_CONST(BMP_NUMCOLORS), /* Number of used colours */
LE32_CONST(BMP_NUMCOLORS), /* Number of important colours */
/* Fixed colours */
#if LCD_DEPTH == 1
0x90, 0xee, 0x90, 0x00, /* Colour #0 */
0x00, 0x00, 0x00, 0x00 /* Colour #1 */
#elif LCD_DEPTH == 2
0xe6, 0xd8, 0xad, 0x00, /* Colour #0 */
0x99, 0x90, 0x73, 0x00, /* Colour #1 */
0x4c, 0x48, 0x39, 0x00, /* Colour #2 */
0x00, 0x00, 0x00, 0x00 /* Colour #3 */
#endif
};
#if LCD_DEPTH == 1
#define BMP_RED 0x90
#define BMP_GREEN 0xee
#define BMP_BLUE 0x90
#elif LCD_DEPTH == 2
#define BMP_RED 0xad
#define BMP_GREEN 0xd8
#define BMP_BLUE 0xe6
#endif
/* Hook function for core screen_dump() to save the current display
content (b&w and greyscale overlay) to an 8-bit BMP file. */
static void grey_screendump_hook(int fd)
{
int i;
int x, y, gx, gy;
#if LCD_PIXELFORMAT == VERTICAL_PACKING
#if LCD_DEPTH == 1
unsigned mask;
#elif LCD_DEPTH == 2
int shift;
#endif
#endif /* LCD_PIXELFORMAT == VERTICAL_PACKING */
unsigned char *lcdptr;
unsigned char *clut_entry;
unsigned char linebuf[MAX(4*BMP_VARCOLORS,BMP_LINESIZE)];
_grey_rb->write(fd, bmpheader, sizeof(bmpheader)); /* write header */
/* build clut */
_grey_rb->memset(linebuf, 0, 4*BMP_VARCOLORS);
clut_entry = linebuf;
for (i = 0; i <= 128; i++)
{
*clut_entry++ = _GREY_MULUQ(BMP_BLUE, i) >> 7;
*clut_entry++ = _GREY_MULUQ(BMP_GREEN, i) >> 7;
*clut_entry++ = _GREY_MULUQ(BMP_RED, i) >> 7;
clut_entry++;
}
_grey_rb->write(fd, linebuf, 4*BMP_VARCOLORS);
/* BMP image goes bottom -> top */
for (y = LCD_HEIGHT - 1; y >= 0; y--)
{
_grey_rb->memset(linebuf, 0, BMP_LINESIZE);
gy = y - _grey_info.y;
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
#if LCD_DEPTH == 2
lcdptr = _grey_rb->lcd_framebuffer + _GREY_MULUQ(LCD_FBWIDTH, y);
for (x = 0; x < LCD_WIDTH; x += 4)
{
gx = x - _grey_info.x;
if (((unsigned)gy < (unsigned)_grey_info.height)
&& ((unsigned)gx < (unsigned)_grey_info.width))
{
#ifdef SIMULATOR
unsigned char *src = _grey_info.buffer
+ _GREY_MULUQ(_grey_info.width, gy) + gx;
for (i = 0; i < 4; i++)
linebuf[x + i] = BMP_FIXEDCOLORS + *src++;
#else
unsigned char *src = &_grey_info.data[_GREY_MULUQ(_grey_info.width,
gy) + gx].value;
for (i = 0; i < 4; i++)
{
linebuf[x + i] = BMP_FIXEDCOLORS + *src;
src += _GREY_X_ADVANCE;
}
#endif
}
else
{
unsigned data = *lcdptr;
linebuf[x] = (data >> 6) & 3;
linebuf[x + 1] = (data >> 4) & 3;
linebuf[x + 2] = (data >> 2) & 3;
linebuf[x + 3] = data & 3;
}
lcdptr++;
}
#endif /* LCD_DEPTH */
#else /* LCD_PIXELFORMAT == VERTICAL_PACKING */
#if LCD_DEPTH == 1
mask = 1 << (y & 7);
lcdptr = _grey_rb->lcd_framebuffer + _GREY_MULUQ(LCD_WIDTH, y >> 3);
for (x = 0; x < LCD_WIDTH; x++)
{
gx = x - _grey_info.x;
if (((unsigned)gy < (unsigned)_grey_info.height)
&& ((unsigned)gx < (unsigned)_grey_info.width))
{
#ifdef SIMULATOR
linebuf[x] = BMP_FIXEDCOLORS
+ _grey_info.buffer[_GREY_MULUQ(_grey_info.width,
gy) + gx];
#else
linebuf[x] = BMP_FIXEDCOLORS
+ _grey_info.data[_GREY_MULUQ(_grey_info.width,
gy & ~7) + (gx << 3) + (~gy & 7)].value;
#endif
}
else
{
linebuf[x] = (*lcdptr & mask) ? 1 : 0;
}
lcdptr++;
}
#elif LCD_DEPTH == 2
shift = 2 * (y & 3);
lcdptr = _grey_rb->lcd_framebuffer + _GREY_MULUQ(LCD_WIDTH, y >> 2);
for (x = 0; x < LCD_WIDTH; x++)
{
gx = x - _grey_info.x;
if (((unsigned)gy < (unsigned)_grey_info.height)
&& ((unsigned)gx < (unsigned)_grey_info.width))
{
#ifdef SIMULATOR
linebuf[x] = BMP_FIXEDCOLORS
+ _grey_info.buffer[_GREY_MULUQ(_grey_info.width,
gy) + gx];
#else
linebuf[x] = BMP_FIXEDCOLORS
+ _grey_info.data[_GREY_MULUQ(_grey_info.width,
gy & ~3) + (gx << 2) + (~gy & 7)].value;
#endif
}
else
{
linebuf[x] = (*lcdptr >> shift) & 3;
}
lcdptr++;
}
#endif /* LCD_DEPTH */
#endif /* LCD_PIXELFORMAT */
_grey_rb->write(fd, linebuf, BMP_LINESIZE);
}
}

681
apps/plugins/lib/grey_draw.c Normal file
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@ -0,0 +1,681 @@
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* New greyscale framework
* Drawing functions
*
* 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.
*
****************************************************************************/
#include "plugin.h"
#include "grey.h"
/*** low-level drawing functions ***/
static void setpixel(unsigned char *address)
{
*address = _grey_info.fg_val;
}
static void clearpixel(unsigned char *address)
{
*address = _grey_info.bg_val;
}
static void flippixel(unsigned char *address)
{
*address = 128 - *address;
}
static void nopixel(unsigned char *address)
{
(void)address;
}
void (* const _grey_pixelfuncs[8])(unsigned char *address) = {
flippixel, nopixel, setpixel, setpixel,
nopixel, clearpixel, nopixel, clearpixel
};
/*** Drawing functions ***/
/* Clear the whole display */
void grey_clear_display(void)
{
int value = (_grey_info.drawmode & DRMODE_INVERSEVID) ?
_grey_info.fg_val : _grey_info.bg_val;
_grey_rb->memset(_grey_info.buffer, value,
_GREY_MULUQ(_grey_info.width, _grey_info.height));
}
/* Set a single pixel */
void grey_drawpixel(int x, int y)
{
if (((unsigned)x < (unsigned)_grey_info.width)
&& ((unsigned)y < (unsigned)_grey_info.height))
_grey_pixelfuncs[_grey_info.drawmode](&_grey_info.buffer[_GREY_MULUQ(
_grey_info.width, y) + x]);
}
/* Draw a line */
void grey_drawline(int x1, int y1, int x2, int y2)
{
int numpixels;
int i;
int deltax, deltay;
int d, dinc1, dinc2;
int x, xinc1, xinc2;
int y, yinc1, yinc2;
void (*pfunc)(unsigned char *address) = _grey_pixelfuncs[_grey_info.drawmode];
deltax = abs(x2 - x1);
deltay = abs(y2 - y1);
xinc2 = 1;
yinc2 = 1;
if (deltax >= deltay)
{
numpixels = deltax;
d = 2 * deltay - deltax;
dinc1 = deltay * 2;
dinc2 = (deltay - deltax) * 2;
xinc1 = 1;
yinc1 = 0;
}
else
{
numpixels = deltay;
d = 2 * deltax - deltay;
dinc1 = deltax * 2;
dinc2 = (deltax - deltay) * 2;
xinc1 = 0;
yinc1 = 1;
}
numpixels++; /* include endpoints */
if (x1 > x2)
{
xinc1 = -xinc1;
xinc2 = -xinc2;
}
if (y1 > y2)
{
yinc1 = -yinc1;
yinc2 = -yinc2;
}
x = x1;
y = y1;
for (i = 0; i < numpixels; i++)
{
if (((unsigned)x < (unsigned)_grey_info.width)
&& ((unsigned)y < (unsigned)_grey_info.height))
pfunc(&_grey_info.buffer[_GREY_MULUQ(_grey_info.width, y) + x]);
if (d < 0)
{
d += dinc1;
x += xinc1;
y += yinc1;
}
else
{
d += dinc2;
x += xinc2;
y += yinc2;
}
}
}
/* Draw a horizontal line (optimised) */
void grey_hline(int x1, int x2, int y)
{
int x;
int value = 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)_grey_info.height)
|| (x1 >= _grey_info.width) || (x2 < 0))
return;
/* clipping */
if (x1 < 0)
x1 = 0;
if (x2 >= _grey_info.width)
x2 = _grey_info.width - 1;
if (_grey_info.drawmode & DRMODE_INVERSEVID)
{
if (_grey_info.drawmode & DRMODE_BG)
{
fillopt = true;
value = _grey_info.bg_val;
}
}
else
{
if (_grey_info.drawmode & DRMODE_FG)
{
fillopt = true;
value = _grey_info.fg_val;
}
}
pfunc = _grey_pixelfuncs[_grey_info.drawmode];
dst = &_grey_info.buffer[_GREY_MULUQ(_grey_info.width, y) + x1];
if (fillopt)
_grey_rb->memset(dst, value, x2 - x1 + 1);
else
{
unsigned char *dst_end = dst + x2 - x1;
do
pfunc(dst++);
while (dst <= dst_end);
}
}
/* Draw a vertical line (optimised) */
void grey_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)_grey_info.width)
|| (y1 >= _grey_info.height) || (y2 < 0))
return;
/* clipping */
if (y1 < 0)
y1 = 0;
if (y2 >= _grey_info.height)
y2 = _grey_info.height - 1;
pfunc = _grey_pixelfuncs[_grey_info.drawmode];
dst = &_grey_info.buffer[_GREY_MULUQ(_grey_info.width, y1) + x];
dst_end = dst + _GREY_MULUQ(_grey_info.width, y2 - y1);
do
{
pfunc(dst);
dst += _grey_info.width;
}
while (dst <= dst_end);
}
/* Draw a filled triangle */
void grey_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++)
{
grey_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++)
{
grey_hline(fp_x1 >> 16, fp_x2 >> 16, y);
fp_x1 += fp_dx1;
fp_x2 += fp_dx2;
}
}
}
}
/* Draw a rectangular box */
void grey_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;
grey_vline(x, y, y2);
grey_vline(x2, y, y2);
grey_hline(x, x2, y);
grey_hline(x, x2, y2);
}
/* Fill a rectangular area */
void grey_fillrect(int x, int y, int width, int height)
{
int value = 0;
unsigned char *dst, *dst_end;
bool fillopt = false;
void (*pfunc)(unsigned char *address);
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= _grey_info.width)
|| (y >= _grey_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 > _grey_info.width)
width = _grey_info.width - x;
if (y + height > _grey_info.height)
height = _grey_info.height - y;
if (_grey_info.drawmode & DRMODE_INVERSEVID)
{
if (_grey_info.drawmode & DRMODE_BG)
{
fillopt = true;
value = _grey_info.bg_val;
}
}
else
{
if (_grey_info.drawmode & DRMODE_FG)
{
fillopt = true;
value = _grey_info.fg_val;
}
}
pfunc = _grey_pixelfuncs[_grey_info.drawmode];
dst = &_grey_info.buffer[_GREY_MULUQ(_grey_info.width, y) + x];
dst_end = dst + _GREY_MULUQ(_grey_info.width, height);
do
{
if (fillopt)
_grey_rb->memset(dst, value, width);
else
{
unsigned char *dst_row = dst;
unsigned char *row_end = dst_row + width;
do
pfunc(dst_row++);
while (dst_row < row_end);
}
dst += _grey_info.width;
}
while (dst < dst_end);
}
/* About Rockbox' internal monochrome bitmap format:
*
* A bitmap contains one bit for every pixel that defines if that pixel is
* foreground (1) or background (0). Bits within a byte are arranged
* 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. */
/* Draw a partial monochrome bitmap */
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)
{
const unsigned char *src_end;
unsigned char *dst, *dst_end;
void (*fgfunc)(unsigned char *address);
void (*bgfunc)(unsigned char *address);
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= _grey_info.width)
|| (y >= _grey_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 > _grey_info.width)
width = _grey_info.width - x;
if (y + height > _grey_info.height)
height = _grey_info.height - y;
src += _GREY_MULUQ(stride, src_y >> 3) + src_x; /* move starting point */
src_y &= 7;
src_end = src + width;
fgfunc = _grey_pixelfuncs[_grey_info.drawmode];
bgfunc = _grey_pixelfuncs[_grey_info.drawmode ^ DRMODE_INVERSEVID];
dst = &_grey_info.buffer[_GREY_MULUQ(_grey_info.width, y) + 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 + _GREY_MULUQ(_grey_info.width, height);
do
{
if (data & 0x01)
fgfunc(dst_col);
else
bgfunc(dst_col);
dst_col += _grey_info.width;
data >>= 1;
if (--numbits == 0)
{
src_col += stride;
data = *src_col;
numbits = 8;
}
}
while (dst_col < dst_end);
}
while (src < src_end);
}
/* Draw a full monochrome bitmap */
void grey_mono_bitmap(const unsigned char *src, int x, int y, int width, int height)
{
grey_mono_bitmap_part(src, 0, 0, width, x, y, width, height);
}
/* Draw a partial greyscale bitmap, canonical format */
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)
{
unsigned char *dst, *dst_end;
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= _grey_info.width)
|| (y >= _grey_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 > _grey_info.width)
width = _grey_info.width - x;
if (y + height > _grey_info.height)
height = _grey_info.height - y;
src += _GREY_MULUQ(stride, src_y) + src_x; /* move starting point */
dst = &_grey_info.buffer[_GREY_MULUQ(_grey_info.width, y) + x];
dst_end = dst + _GREY_MULUQ(_grey_info.width, height);
do
{
const unsigned char *src_row = src;
unsigned char *dst_row = dst;
unsigned char *row_end = dst_row + width;
do
*dst_row++ = _grey_info.gvalue[*src_row++];
while (dst_row < row_end);
src += stride;
dst += _grey_info.width;
}
while (dst < dst_end);
}
/* Draw a full greyscale bitmap, canonical format */
void grey_gray_bitmap(const unsigned char *src, int x, int y, int width,
int height)
{
grey_gray_bitmap_part(src, 0, 0, width, x, y, width, height);
}
/* Put a string at a given pixel position, skipping first ofs pixel columns */
void grey_putsxyofs(int x, int y, int ofs, const unsigned char *str)
{
int ch;
struct font* pf = _grey_rb->font_get(_grey_info.curfont);
while ((ch = *str++) != '\0' && x < _grey_info.width)
{
int width;
const unsigned char *bits;
/* check input range */
if (ch < pf->firstchar || ch >= pf->firstchar+pf->size)
ch = pf->defaultchar;
ch -= pf->firstchar;
/* get proportional width and glyph bits */
width = pf->width ? pf->width[ch] : pf->maxwidth;
if (ofs > width)
{
ofs -= width;
continue;
}
bits = pf->bits + (pf->offset ?
pf->offset[ch] : (((pf->height + 7) >> 3) * pf->maxwidth * ch));
grey_mono_bitmap_part(bits, ofs, 0, width, x, y, width - ofs, pf->height);
x += width - ofs;
ofs = 0;
}
}
/* Put a string at a given pixel position */
void grey_putsxy(int x, int y, const unsigned char *str)
{
grey_putsxyofs(x, y, 0, str);
}
/*** Unbuffered drawing functions ***/
#ifdef SIMULATOR
/* Clear the whole display */
void grey_ub_clear_display(void)
{
grey_clear_display();
grey_update();
}
/* Draw a partial greyscale bitmap, canonical format */
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)
{
grey_gray_bitmap_part(src, src_x, src_y, stride, x, y, width, height);
grey_update_rect(x, y, width, height);
}
#else /* !SIMULATOR */
/* Clear the greyscale display (sets all pixels to white) */
void grey_ub_clear_display(void)
{
int value = (_grey_info.drawmode & DRMODE_INVERSEVID) ?
_grey_info.fg_val : _grey_info.bg_val;
unsigned char *dst = &_grey_info.data[0].value;
unsigned char *dst_end = dst + sizeof(struct grey_data)
* _GREY_MULUQ(_grey_info.width, _grey_info.height);
do
{
*dst = value;
dst += sizeof(struct grey_data);
}
while (dst < dst_end);
}
/* Draw a partial greyscale bitmap, canonical format */
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)
{
/* nothing to draw? */
if ((width <= 0) || (height <= 0) || (x >= _grey_info.width)
|| (y >= _grey_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 > _grey_info.width)
width = _grey_info.width - x;
if (y + height > _grey_info.height)
height = _grey_info.height - y;
src += _GREY_MULUQ(stride, src_y) + src_x; /* move starting point */
do
{
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
int idx = _GREY_MULUQ(_grey_info.width, y) + x;
#else
#if LCD_DEPTH == 1
int idx = _GREY_MULUQ(_grey_info.width, y & ~7) + (x << 3) + (~y & 7);
#elif LCD_DEPTH == 2
int idx = _GREY_MULUQ(_grey_info.width, y & ~3) + (x << 2) + (~y & 3);
#endif
#endif /* LCD_PIXELFORMAT */
unsigned char *dst_row = &_grey_info.data[idx].value;
const unsigned char *src_row = src;
const unsigned char *src_end = src + width;
do
{
*dst_row = _grey_info.gvalue[*src_row++];
dst_row += _GREY_X_ADVANCE;
}
while (src_row < src_end);
y++;
src += stride;
}
while (--height > 0);
}
#endif /* !SIMULATOR */
/* Draw a full greyscale bitmap, canonical format */
void grey_ub_gray_bitmap(const unsigned char *src, int x, int y, int width,
int height)
{
grey_ub_gray_bitmap_part(src, 0, 0, width, x, y, width, height);
}

116
apps/plugins/lib/grey_parm.c Normal file
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@ -0,0 +1,116 @@
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* New greyscale framework
* Parameter handling
*
* 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.
*
****************************************************************************/
#include "plugin.h"
#include "grey.h"
/* Set position of the top left corner of the greyscale overlay
Note that depending on the target LCD, either x or y gets rounded
to the nearest multiple of 4 or 8 */
void grey_set_position(int x, int y)
{
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
_grey_info.bx = (x + 4) >> 3;
x = 8 * _grey_info.bx;
#else
#if LCD_DEPTH == 1
_grey_info.by = (y + 4) >> 3;
y = 8 * _grey_info.by;
#elif LCD_DEPTH == 2
_grey_info.by = (y + 2) >> 2;
y = 4 * _grey_info.by;
#endif
#endif /* LCD_PIXELFORMAT */
_grey_info.x = x;
_grey_info.y = y;
if (_grey_info.flags & _GREY_RUNNING)
{
#ifdef SIMULATOR
grey_deferred_lcd_update();
grey_update();
#else
_grey_info.flags |= _GREY_DEFERRED_UPDATE;
#endif
}
}
/* Set the draw mode for subsequent drawing operations */
void grey_set_drawmode(int mode)
{
_grey_info.drawmode = mode & (DRMODE_SOLID|DRMODE_INVERSEVID);
}
/* Return the current draw mode */
int grey_get_drawmode(void)
{
return _grey_info.drawmode;
}
/* Set the foreground shade for subsequent drawing operations */
void grey_set_foreground(unsigned brightness)
{
_grey_info.fg_val = _grey_info.gvalue[brightness];
_grey_info.fg_brightness = brightness;
}
/* Return the current foreground shade */
unsigned grey_get_foreground(void)
{
return _grey_info.fg_brightness;
}
/* Set the background shade for subsequent drawing operations */
void grey_set_background(unsigned brightness)
{
_grey_info.bg_val = _grey_info.gvalue[brightness];
_grey_info.bg_brightness = brightness;
}
/* Return the current background shade */
unsigned grey_get_background(void)
{
return _grey_info.bg_brightness;
}
/* Set draw mode, foreground and background shades at once */
void grey_set_drawinfo(int mode, unsigned fg_brightness, unsigned bg_brightness)
{
grey_set_drawmode(mode);
grey_set_foreground(fg_brightness);
grey_set_background(bg_brightness);
}
/* Set font for the text output routines */
void grey_setfont(int newfont)
{
_grey_info.curfont = newfont;
}
/* Get width and height of a text when printed with the current font */
int grey_getstringsize(const unsigned char *str, int *w, int *h)
{
return _grey_rb->font_getstringsize(str, w, h, _grey_info.curfont);
}

358
apps/plugins/lib/grey_scroll.c Normal file
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* New greyscale framework
* Scrolling routines
*
* 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.
*
****************************************************************************/
#include "plugin.h"
#include "grey.h"
/*** Scrolling ***/
/* Scroll left */
void grey_scroll_left(int count)
{
unsigned char *data, *data_end;
int length, blank;
if ((unsigned)count >= (unsigned)_grey_info.width)
return;
data = _grey_info.buffer;
data_end = data + _GREY_MULUQ(_grey_info.width, _grey_info.height);
length = _grey_info.width - count;
blank = (_grey_info.drawmode & DRMODE_INVERSEVID) ?
_grey_info.fg_val : _grey_info.bg_val;
do
{
_grey_rb->memmove(data, data + count, length);
_grey_rb->memset(data + length, blank, count);
data += _grey_info.width;
}
while (data < data_end);
}
/* Scroll right */
void grey_scroll_right(int count)
{
unsigned char *data, *data_end;
int length, blank;
if ((unsigned)count >= (unsigned)_grey_info.width)
return;
data = _grey_info.buffer;
data_end = data + _GREY_MULUQ(_grey_info.width, _grey_info.height);
length = _grey_info.width - count;
blank = (_grey_info.drawmode & DRMODE_INVERSEVID) ?
_grey_info.fg_val : _grey_info.bg_val;
do
{
_grey_rb->memmove(data + count, data, length);
_grey_rb->memset(data, blank, count);
data += _grey_info.width;
}
while (data < data_end);
}
/* Scroll up */
void grey_scroll_up(int count)
{
long shift, length;
int blank;
if ((unsigned)count >= (unsigned)_grey_info.height)
return;
shift = _GREY_MULUQ(_grey_info.width, count);
length = _GREY_MULUQ(_grey_info.width, _grey_info.height - count);
blank = (_grey_info.drawmode & DRMODE_INVERSEVID) ?
_grey_info.fg_val : _grey_info.bg_val;
_grey_rb->memmove(_grey_info.buffer, _grey_info.buffer + shift, length);
_grey_rb->memset(_grey_info.buffer + length, blank, shift);
}
/* Scroll down */
void grey_scroll_down(int count)
{
long shift, length;
int blank;
if ((unsigned)count >= (unsigned)_grey_info.height)
return;
shift = _GREY_MULUQ(_grey_info.width, count);
length = _GREY_MULUQ(_grey_info.width, _grey_info.height - count);
blank = (_grey_info.drawmode & DRMODE_INVERSEVID) ?
_grey_info.fg_val : _grey_info.bg_val;
_grey_rb->memmove(_grey_info.buffer + shift, _grey_info.buffer, length);
_grey_rb->memset(_grey_info.buffer, blank, shift);
}
/*** Unbuffered scrolling functions ***/
#ifdef SIMULATOR
/* Scroll left */
void grey_ub_scroll_left(int count)
{
grey_scroll_left(count);
grey_update();
}
/* Scroll right */
void grey_ub_scroll_right(int count)
{
grey_scroll_right(count);
grey_update();
}
/* Scroll up */
void grey_ub_scroll_up(int count)
{
grey_scroll_up(count);
grey_update();
}
/* Scroll down */
void grey_ub_scroll_down(int count)
{
grey_scroll_down(count);
grey_update();
}
#else /* !SIMULATOR */
/* Scroll left */
void grey_ub_scroll_left(int count)
{
unsigned char *dst, *src, *end;
int blank, y, idx;
if ((count == 0) || ((unsigned)count >= (unsigned)_grey_info.width))
return;
blank = (_grey_info.drawmode & DRMODE_INVERSEVID) ?
_grey_info.fg_val : _grey_info.bg_val;
for (y = 0; y < _grey_info.height; y++)
{
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
idx = _GREY_MULUQ(_grey_info.width, y);
#else
#if LCD_DEPTH == 1
idx = _GREY_MULUQ(_grey_info.width, y & ~7) + (~y & 7);
#elif LCD_DEPTH == 2
idx = _GREY_MULUQ(_grey_info.width, y & ~3) + (~y & 3);
#endif
#endif /* LCD_PIXELFORMAT */
dst = &_grey_info.data[idx].value;
src = dst + count * _GREY_X_ADVANCE;
end = dst + _grey_info.width * _GREY_X_ADVANCE;
do
{
*dst = *src;
dst += _GREY_X_ADVANCE;
src += _GREY_X_ADVANCE;
}
while (src < end);
do
{
*dst = blank;
dst += _GREY_X_ADVANCE;
}
while (dst < end);
}
}
/* Scroll right */
void grey_ub_scroll_right(int count)
{
unsigned char *dst, *src, *start;
int blank, y, idx;
if ((count == 0) || ((unsigned)count >= (unsigned)_grey_info.width))
return;
blank = (_grey_info.drawmode & DRMODE_INVERSEVID) ?
_grey_info.fg_val : _grey_info.bg_val;
for (y = 0; y < _grey_info.height; y++)
{
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
idx = _GREY_MULUQ(_grey_info.width, y);
#else
#if LCD_DEPTH == 1
idx = _GREY_MULUQ(_grey_info.width, y & ~7) + (~y & 7);
#elif LCD_DEPTH == 2
idx = _GREY_MULUQ(_grey_info.width, y & ~3) + (~y & 3);
#endif
#endif /* LCD_PIXELFORMAT */
start = &_grey_info.data[idx].value;
dst = start + _grey_info.width * _GREY_X_ADVANCE;
src = dst - count * _GREY_X_ADVANCE;
do
{
dst -= _GREY_X_ADVANCE;
src -= _GREY_X_ADVANCE;
*dst = *src;
}
while (src > start);
do
{
dst -= _GREY_X_ADVANCE;
*dst = blank;
}
while (dst > start);
}
}
void grey_ub_scroll_up(int count)
{
unsigned char *dst, *dst_end, *src;
int blank, ys, yd, is, id;
if ((unsigned)count >= (unsigned)_grey_info.height)
return;
blank = (_grey_info.drawmode & DRMODE_INVERSEVID) ?
_grey_info.fg_val : _grey_info.bg_val;
for (ys = count, yd = 0; ys < _grey_info.height; ys++, yd++)
{
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
id = _GREY_MULUQ(_grey_info.width, yd);
is = _GREY_MULUQ(_grey_info.width, ys);
#else
#if LCD_DEPTH == 1
id = _GREY_MULUQ(_grey_info.width, yd & ~7) + (~yd & 7);
is = _GREY_MULUQ(_grey_info.width, ys & ~7) + (~ys & 7);
#elif LCD_DEPTH == 2
id = _GREY_MULUQ(_grey_info.width, yd & ~3) + (~yd & 3);
is = _GREY_MULUQ(_grey_info.width, ys & ~3) + (~ys & 3);
#endif
#endif /* LCD_PIXELFORMAT */
dst = &_grey_info.data[id].value;
src = &_grey_info.data[is].value;
dst_end = dst + _grey_info.width * _GREY_X_ADVANCE;
do
{
*dst = *src;
dst += _GREY_X_ADVANCE;
src += _GREY_X_ADVANCE;
}
while (dst < dst_end);
}
for (; yd < _grey_info.height; yd++)
{
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
id = _GREY_MULUQ(_grey_info.width, yd);
#else
#if LCD_DEPTH == 1
id = _GREY_MULUQ(_grey_info.width, yd & ~7) + (~yd & 7);
#elif LCD_DEPTH == 2
id = _GREY_MULUQ(_grey_info.width, yd & ~3) + (~yd & 3);
#endif
#endif /* LCD_PIXELFORMAT */
dst = &_grey_info.data[id].value;
dst_end = dst + _grey_info.width * _GREY_X_ADVANCE;
do
{
*dst = blank;
dst += _GREY_X_ADVANCE;
}
while (dst < dst_end);
}
}
void grey_ub_scroll_down(int count)
{
unsigned char *dst, *dst_end, *src;
int blank, ys, yd, is, id;
if ((unsigned)count >= (unsigned)_grey_info.height)
return;
blank = (_grey_info.drawmode & DRMODE_INVERSEVID) ?
_grey_info.fg_val : _grey_info.bg_val;
yd = _grey_info.height - 1;
for (ys = yd - count; ys >= 0; ys--, yd--)
{
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
id = _GREY_MULUQ(_grey_info.width, yd);
is = _GREY_MULUQ(_grey_info.width, ys);
#else
#if LCD_DEPTH == 1
id = _GREY_MULUQ(_grey_info.width, yd & ~7) + (~yd & 7);
is = _GREY_MULUQ(_grey_info.width, ys & ~7) + (~ys & 7);
#elif LCD_DEPTH == 2
id = _GREY_MULUQ(_grey_info.width, yd & ~3) + (~yd & 3);
is = _GREY_MULUQ(_grey_info.width, ys & ~3) + (~ys & 3);
#endif
#endif /* LCD_PIXELFORMAT */
dst = &_grey_info.data[id].value;
src = &_grey_info.data[is].value;
dst_end = dst + _grey_info.width * _GREY_X_ADVANCE;
do
{
*dst = *src;
dst += _GREY_X_ADVANCE;
src += _GREY_X_ADVANCE;
}
while (dst < dst_end);
}
for (; yd >= 0; yd--)
{
#if LCD_PIXELFORMAT == HORIZONTAL_PACKING
id = _GREY_MULUQ(_grey_info.width, yd);
#else
#if LCD_DEPTH == 1
id = _GREY_MULUQ(_grey_info.width, yd & ~7) + (~yd & 7);
#elif LCD_DEPTH == 2
id = _GREY_MULUQ(_grey_info.width, yd & ~3) + (~yd & 3);
#endif
#endif /* LCD_PIXELFORMAT */
dst = &_grey_info.data[id].value;
dst_end = dst + _grey_info.width * _GREY_X_ADVANCE;
do
{
*dst = blank;
dst += _GREY_X_ADVANCE;
}
while (dst < dst_end);
}
}
#endif /* !SIMULATOR */