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rockbox/apps/plugins/grayscale.c
Jens Arnold 628d20a610 Grayscale library: LCD linearisation and gamma correction. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10402 a1c6a512-1295-4272-9138-f99709370657
2006-08-02 00:22:01 +00:00

342 lines
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Grayscale demo plugin
*
* Copyright (C) 2004 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"
#if defined(HAVE_LCD_BITMAP) && (LCD_DEPTH < 4) && (CONFIG_LCD != LCD_IPOD2BPP)
#include "gray.h"
PLUGIN_HEADER
/* variable button definitions */
#if CONFIG_KEYPAD == RECORDER_PAD
#define GRAYSCALE_SHIFT BUTTON_ON
#define GRAYSCALE_UP BUTTON_UP
#define GRAYSCALE_DOWN BUTTON_DOWN
#define GRAYSCALE_LEFT BUTTON_LEFT
#define GRAYSCALE_RIGHT BUTTON_RIGHT
#define GRAYSCALE_OFF BUTTON_OFF
#elif CONFIG_KEYPAD == ONDIO_PAD
#define GRAYSCALE_SHIFT BUTTON_MENU
#define GRAYSCALE_UP BUTTON_UP
#define GRAYSCALE_DOWN BUTTON_DOWN
#define GRAYSCALE_LEFT BUTTON_LEFT
#define GRAYSCALE_RIGHT BUTTON_RIGHT
#define GRAYSCALE_OFF BUTTON_OFF
#elif CONFIG_KEYPAD == IRIVER_H100_PAD
#define GRAYSCALE_SHIFT BUTTON_ON
#define GRAYSCALE_UP BUTTON_UP
#define GRAYSCALE_DOWN BUTTON_DOWN
#define GRAYSCALE_LEFT BUTTON_LEFT
#define GRAYSCALE_RIGHT BUTTON_RIGHT
#define GRAYSCALE_OFF BUTTON_OFF
#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_LEFT BUTTON_LEFT
#define GRAYSCALE_RIGHT BUTTON_RIGHT
#define GRAYSCALE_OFF (BUTTON_SELECT | BUTTON_MENU)
#endif
#define GFX_HEIGHT (LCD_HEIGHT-8)
#if LCD_WIDTH < 160
#define GFX_GRAYTONE_WIDTH 86
#define GFX_GRAYTONE_STEP 3
#else
#define GFX_GRAYTONE_WIDTH 128
#define GFX_GRAYTONE_STEP 2
#endif
/******************************* Globals ***********************************/
static struct plugin_api* rb; /* global api struct pointer */
static char pbuf[32]; /* global printf buffer */
static unsigned char *gbuf;
static unsigned int gbuf_size = 0;
/**************************** main function ********************************/
void cleanup(void *parameter)
{
(void)parameter;
gray_release(); /* switch off overlay and deinitialize */
/* restore normal backlight setting */
rb->backlight_set_timeout(rb->global_settings->backlight_timeout);
}
/* this is only a demo of what the framework can do */
int main(void)
{
int shades, time;
int x, y, i;
int button, scroll_amount;
bool black_border = false;
static const unsigned char rockbox[] = {
/* ...........................................
* .####...###...###..#...#.####...###..#...#.
* .#...#.#...#.#...#.#..#..#...#.#...#..#.#..
* .####..#...#.#.....###...####..#...#...#...
* .#..#..#...#.#...#.#..#..#...#.#...#..#.#..
* .#...#..###...###..#...#.####...###..#...#.
* ...........................................
* 43 x 7 pixel, 1 bpp
*/
0x00, 0x3E, 0x0A, 0x0A, 0x1A, 0x24, 0x00, 0x1C, 0x22, 0x22,
0x22, 0x1C, 0x00, 0x1C, 0x22, 0x22, 0x22, 0x14, 0x00, 0x3E,
0x08, 0x08, 0x14, 0x22, 0x00, 0x3E, 0x2A, 0x2A, 0x2A, 0x14,
0x00, 0x1C, 0x22, 0x22, 0x22, 0x1C, 0x00, 0x22, 0x14, 0x08,
0x14, 0x22, 0x00
};
static const unsigned char showing[] = {
/* .......................................
* ..####.#...#..###..#...#.#.#...#..####.
* .#.....#...#.#...#.#...#.#.##..#.#.....
* ..###..#####.#...#.#.#.#.#.#.#.#.#..##.
* .....#.#...#.#...#.#.#.#.#.#..##.#...#.
* .####..#...#..###...#.#..#.#...#..####.
* .......................................
* 39 x 7 pixel, 1 bpp
*/
0x00, 0x24, 0x2A, 0x2A, 0x2A, 0x12, 0x00, 0x3E, 0x08, 0x08,
0x08, 0x3E, 0x00, 0x1C, 0x22, 0x22, 0x22, 0x1C, 0x00, 0x1E,
0x20, 0x18, 0x20, 0x1E, 0x00, 0x3E, 0x00, 0x3E, 0x04, 0x08,
0x10, 0x3E, 0x00, 0x1C, 0x22, 0x22, 0x2A, 0x3A, 0x00
};
static const unsigned char grayscale_gray[] = {
/* .......................................................
* ..####.####...###..#...#..####..###...###..#.....#####.
* .#.....#...#.#...#.#...#.#.....#...#.#...#.#.....#.....
* .#..##.####..#####..#.#...###..#.....#####.#.....####..
* .#...#.#..#..#...#...#.......#.#...#.#...#.#.....#.....
* ..####.#...#.#...#...#...####...###..#...#.#####.#####.
* .......................................................
* 55 x 7 pixel, 8 bpp
*/
110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,
110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,
110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,
110,110,110,110,110,110,110,
120,120, 20, 20, 20, 20,120,222,222,222,222,120,120,120, 24, 24,
24,120,120,226,120,120,120,226,120,120, 28, 28, 28, 28,120,120,
230,230,230,120,120,120, 32, 32, 32,120,120,234,120,120,120,120,
120, 36, 36, 36, 36, 36,120,
130, 20,130,130,130,130,130,222,130,130,130,222,130, 24,130,130,
130, 24,130,226,130,130,130,226,130, 28,130,130,130,130,130,230,
130,130,130,230,130, 32,130,130,130, 32,130,234,130,130,130,130,
130, 36,130,130,130,130,130,
140, 20,140,140, 20, 20,140,222,222,222,222,140,140, 24, 24, 24,
24, 24,140,140,226,140,226,140,140,140, 28, 28, 28,140,140,230,
140,140,140,140,140, 32, 32, 32, 32, 32,140,234,140,140,140,140,
140, 36, 36, 36, 36,140,140,
130, 20,130,130,130, 20,130,222,130,130,222,130,130, 24,130,130,
130, 24,130,130,130,226,130,130,130,130,130,130,130, 28,130,230,
130,130,130,230,130, 32,130,130,130, 32,130,234,130,130,130,130,
130, 36,130,130,130,130,130,
120,120, 20, 20, 20, 20,120,222,120,120,120,222,120, 24,120,120,
120, 24,120,120,120,226,120,120,120, 28, 28, 28, 28,120,120,120,
230,230,230,120,120, 32,120,120,120, 32,120,234,234,234,234,234,
120, 36, 36, 36, 36, 36,120,
110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,
110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,
110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,110,
110,110,110,110,110,110,110
};
if (rb->global_settings->backlight_timeout > 0)
rb->backlight_set_timeout(1); /* keep the light on */
rb->lcd_setfont(FONT_SYSFIXED); /* select default font */
/* get the remainder of the plugin buffer */
gbuf = (unsigned char *) rb->plugin_get_buffer(&gbuf_size);
/* initialize the greyscale buffer:
Archos: 112 pixels wide, 7 rows (56 pixels) high, (try to) reserve
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,
32, 0, NULL) + 1;
/* place greyscale overlay 1 row down */
gray_set_position(0, 1);
rb->snprintf(pbuf, sizeof(pbuf), "Shades: %d", shades);
rb->lcd_puts(0, 0, pbuf);
rb->lcd_update();
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
rb->cpu_boost(true);
#endif
gray_show(true); /* switch on greyscale overlay */
time = *rb->current_tick; /* start time measurement */
gray_set_background(150);
gray_clear_display(); /* fill everything with grey 150 */
/* draw a dark grey line star background */
gray_set_foreground(80);
for (y = 0; y < GFX_HEIGHT; y += 8) /* horizontal part */
{
gray_drawline(0, y, (LCD_WIDTH-1), (GFX_HEIGHT-1) - y); /*grey lines */
}
for (x = 10; x <= LCD_WIDTH; x += 10) /* vertical part */
{
gray_drawline(x, 0, (LCD_WIDTH-1) - x, (GFX_HEIGHT-1)); /*grey lines */
}
gray_set_foreground(0);
gray_drawrect(0, 0, LCD_WIDTH, GFX_HEIGHT); /* black border */
/* draw grey tones */
for (i = 0; i < GFX_GRAYTONE_WIDTH; i++)
{
x = ((LCD_WIDTH-GFX_GRAYTONE_WIDTH)/2) + i;
gray_set_foreground(GFX_GRAYTONE_STEP * i);
/* vertical lines */
gray_vline(x, (GFX_HEIGHT/8), (GFX_HEIGHT-GFX_HEIGHT/8-1));
}
gray_set_drawmode(DRMODE_COMPLEMENT);
/* invert rectangle (lower half) */
gray_fillrect((LCD_WIDTH-GFX_GRAYTONE_WIDTH)/2, (GFX_HEIGHT/2+1),
GFX_GRAYTONE_WIDTH, (GFX_HEIGHT/2-GFX_HEIGHT/8-1));
/* invert a line */
gray_hline((LCD_WIDTH-GFX_GRAYTONE_WIDTH)/2,
(LCD_WIDTH+GFX_GRAYTONE_WIDTH)/2, (GFX_HEIGHT/2-1));
/* show bitmaps (1 bit and 8 bit) */
/* opaque */
gray_set_drawinfo(DRMODE_SOLID, 255, 100);
gray_mono_bitmap(rockbox,
MAX((LCD_WIDTH/2-47), ((LCD_WIDTH-GFX_GRAYTONE_WIDTH)/2)),
(5*GFX_HEIGHT/16-4), 43, 7);
/* transparent */
gray_set_drawinfo(DRMODE_FG, 0, 100);
gray_mono_bitmap(showing, (LCD_WIDTH/2+4) , (5*GFX_HEIGHT/16-4), 39, 7);
/* greyscale */
gray_gray_bitmap(grayscale_gray, ((LCD_WIDTH-55)/2), (11*GFX_HEIGHT/16-4),
55, 7);
gray_update();
time = *rb->current_tick - time; /* end time measurement */
rb->snprintf(pbuf, sizeof(pbuf), "Shades: %d, %d.%02ds", shades,
time / 100, time % 100);
rb->lcd_puts(0, 0, pbuf);
gray_deferred_lcd_update(); /* schedule an lcd_update() */
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
rb->cpu_boost(false);
#endif
/* drawing is now finished, play around with scrolling
* until you press OFF or connect USB
*/
gray_set_background(255);
while (true)
{
scroll_amount = 1;
button = rb->button_get(true);
if (rb->default_event_handler_ex(button, cleanup, NULL)
== SYS_USB_CONNECTED)
return PLUGIN_USB_CONNECTED;
if (button & GRAYSCALE_SHIFT)
{
if (!black_border)
{
gray_set_background(0);
black_border = true;
}
}
else
{
if (black_border)
{
gray_set_background(255);
black_border = false;
}
}
if (button & BUTTON_REPEAT)
scroll_amount = 4;
switch (button & ~(GRAYSCALE_SHIFT | BUTTON_REPEAT))
{
case GRAYSCALE_LEFT:
gray_scroll_left(scroll_amount); /* scroll left */
gray_update();
break;
case GRAYSCALE_RIGHT:
gray_scroll_right(scroll_amount); /* scroll right */
gray_update();
break;
case GRAYSCALE_UP:
gray_scroll_up(scroll_amount); /* scroll up */
gray_update();
break;
case GRAYSCALE_DOWN:
gray_scroll_down(scroll_amount); /* scroll down */
gray_update();
break;
#ifdef GRAYSCALE_RC_OFF
case GRAYSCALE_RC_OFF:
#endif
case GRAYSCALE_OFF:
cleanup(NULL);
return PLUGIN_OK;
}
}
}
/*************************** Plugin entry point ****************************/
enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
{
rb = api; /* copy to global api pointer */
(void)parameter;
return main();
}
#endif /* #ifdef HAVE_LCD_BITMAP */
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