Grayscale demo plugin, now using the grayscale library

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4642 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 259 insertions, 0 deletions

diff --git a/apps/plugins/grayscale.c b/apps/plugins/grayscale.c
new file mode 100644
index 0000000000..0231541761
--- /dev/null
+++ b/apps/plugins/grayscale.c
@@ -0,0 +1,259 @@
+/***************************************************************************
+*             __________               __   ___.
+*   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.
+*
+****************************************************************************/
+
+#ifndef SIMULATOR /* not for simulator by now */
+#include "plugin.h"
+
+#ifdef HAVE_LCD_BITMAP /* and also not for the Player */
+#include "gray.h"
+
+/******************************* 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 ********************************/
+
+/* 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;
+
+    static 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 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 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 grayscale buffer:
+     * 112 pixels wide, 7 rows (56 pixels) high, (try to) reserve
+     * 32 bitplanes for 33 shades of gray. (uses 25268 bytes)*/
+    shades = gray_init_buffer(gbuf, gbuf_size, 112, 7, 32) + 1;
+
+    /* place grayscale overlay 1 row down */
+    gray_position_display(0, 1);
+
+    rb->snprintf(pbuf, sizeof(pbuf), "Shades: %d", shades);
+    rb->lcd_puts(0, 0, pbuf);
+    rb->lcd_update();
+
+    gray_show_display(true);  /* switch on grayscale overlay */
+
+    time = *rb->current_tick; /* start time measurement */
+
+    gray_fillrect(0, 0, 111, 55, 150); /* fill everything with gray 150 */
+
+    /* draw a dark gray line star background */
+    for (y = 0; y < 56; y += 8)        /* horizontal part */
+    {
+        gray_drawline(0, y, 111, 55 - y, 80); /* gray lines */
+    }
+    for (x = 10; x < 112; x += 10)     /* vertical part */
+    {
+        gray_drawline(x, 0, 111 - x, 55, 80); /* gray lines */
+    }
+
+    gray_drawrect(0, 0, 111, 55, 0);   /* black border */
+
+    /* draw gray tones */
+    for (i = 0; i < 86; i++)           
+    {
+        x = 13 + i;
+        gray_fillrect(x, 6, x, 49, 3 * i); /* gray rectangles */
+    }
+
+    gray_invertrect(13, 29, 98, 49);   /* invert rectangle (lower half) */
+    gray_invertline(13, 27, 98, 27);   /* invert a line */
+    
+    /* show bitmaps (1 bit and 8 bit) */
+    gray_drawbitmap(rockbox, 14, 13, 43, 7, 43, true, 255, 100);   /* opaque */
+    gray_drawbitmap(showing, 58, 13, 39, 7, 39, false, 0, 0); /* transparent */
+    gray_drawgraymap(grayscale_gray, 28, 35, 55, 7, 55);
+
+    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_update();             /* schedule an lcd_update() */
+
+    /* drawing is now finished, play around with scrolling 
+     * until you press OFF or connect USB
+     */
+    while (true)
+    {
+        scroll_amount = 1;
+        black_border = false;
+
+        button = rb->button_get(true);
+
+        if (button == SYS_USB_CONNECTED)
+        {
+            gray_release_buffer(); /* switch off overlay and deinitialize */
+            /* restore normal backlight setting */
+            rb->backlight_set_timeout(rb->global_settings->backlight_timeout);
+            return PLUGIN_USB_CONNECTED;
+        }
+
+        if (button & BUTTON_ON)
+            black_border = true;
+            
+        if (button & BUTTON_REPEAT)
+            scroll_amount = 4;
+
+        switch(button & ~(BUTTON_ON | BUTTON_REPEAT))
+        {
+            case BUTTON_LEFT:
+
+                gray_scroll_left(scroll_amount, black_border); /* scroll left */
+                break;
+
+            case BUTTON_RIGHT:
+
+                gray_scroll_right(scroll_amount, black_border); /* scroll right */
+                break;
+
+            case BUTTON_UP:
+
+                gray_scroll_up(scroll_amount, black_border); /* scroll up */
+                break;
+
+            case BUTTON_DOWN:
+
+                gray_scroll_down(scroll_amount, black_border); /* scroll down */
+                break;
+
+            case BUTTON_OFF:
+
+                gray_release_buffer(); /* switch off overlay and deinitialize */
+                /* restore normal backlight setting */
+                rb->backlight_set_timeout(rb->global_settings->backlight_timeout);
+                return PLUGIN_OK;
+        }
+    }
+}
+
+/*************************** Plugin entry point ****************************/
+
+enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
+{
+    int ret;
+    /* this macro should be called as the first thing you do in the plugin.
+    it test that the api version and model the plugin was compiled for
+    matches the machine it is running on */
+    TEST_PLUGIN_API(api);
+
+    rb = api; // copy to global api pointer
+    (void)parameter;
+ 
+    /* This plugin uses the grayscale framework, so initialize */
+    gray_init(api);
+
+    ret = main();
+
+    if (ret == PLUGIN_USB_CONNECTED)
+        rb->usb_screen();
+    return ret;
+}
+
+#endif // #ifdef HAVE_LCD_BITMAP
+#endif // #ifndef SIMULATOR
+