/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2004 Matthias Wientapper * * * 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 #include "plugin.h" #ifdef HAVE_LCD_BITMAP // this is not fun on the player # include "gray.h" /* variable button definitions */ #if CONFIG_KEYPAD == RECORDER_PAD #define MANDELBROT_QUIT BUTTON_OFF #define MANDELBROT_ZOOM_IN BUTTON_PLAY #define MANDELBROT_ZOOM_OUT BUTTON_ON #define MANDELBROT_MAXITER_INC BUTTON_F2 #define MANDELBROT_MAXITER_DEC BUTTON_F1 #define MANDELBROT_RESET BUTTON_F3 #elif CONFIG_KEYPAD == ONDIO_PAD #define MANDELBROT_QUIT BUTTON_OFF #define MANDELBROT_ZOOM_IN_PRE BUTTON_MENU #define MANDELBROT_ZOOM_IN (BUTTON_MENU | BUTTON_REL) #define MANDELBROT_ZOOM_IN2 (BUTTON_MENU | BUTTON_UP) #define MANDELBROT_ZOOM_OUT (BUTTON_MENU | BUTTON_DOWN) #define MANDELBROT_MAXITER_INC (BUTTON_MENU | BUTTON_RIGHT) #define MANDELBROT_MAXITER_DEC (BUTTON_MENU | BUTTON_LEFT) #define MANDELBROT_RESET (BUTTON_MENU | BUTTON_OFF) #endif static struct plugin_api* rb; static char buff[32]; static int lcd_aspect_ratio; static int x_min; static int x_max; static int y_min; static int y_max; static int delta; static int max_iter; static unsigned char *gbuf; static unsigned int gbuf_size = 0; static unsigned char graybuffer[LCD_HEIGHT]; void init_mandelbrot_set(void){ x_min = -5<<25; // -2.0<<26 x_max = 1<<26; // 1.0<<26 y_min = -1<<26; // -1.0<<26 y_max = 1<<26; // 1.0<<26 delta = (x_max - x_min) >> 3; // /8 max_iter = 25; } void calc_mandelbrot_set(void){ long start_tick, last_yield; int n_iter; int x_pixel, y_pixel; int x, x2, y, y2, a, b; int x_fact, y_fact; int brightness; start_tick = last_yield = *rb->current_tick; gray_clear_display(); x_fact = (x_max - x_min) / LCD_WIDTH; y_fact = (y_max - y_min) / LCD_HEIGHT; for (x_pixel = 0; x_pixel=0; y_pixel--){ b = (y_pixel * y_fact) + y_min; x = 0; y = 0; n_iter = 0; while (++n_iter<=max_iter) { x >>= 13; y >>= 13; x2 = x * x; y2 = y * y; if (x2 + y2 > (4<<26)) break; y = 2 * x * y + b; x = x2 - y2 + a; } // "coloring" brightness = 0; if (n_iter > max_iter){ brightness = 0; // black } else { brightness = 255 - (31 * (n_iter & 7)); } graybuffer[y_pixel]=brightness; /* be nice to other threads: * if at least one tick has passed, yield */ if (*rb->current_tick > last_yield){ rb->yield(); last_yield = *rb->current_tick; } } gray_drawgraymap(graybuffer, x_pixel, 0, 1, LCD_HEIGHT, 1); } } void cleanup(void *parameter) { (void)parameter; gray_release_buffer(); } enum plugin_status plugin_start(struct plugin_api* api, void* parameter) { int button; int lastbutton = BUTTON_NONE; int grayscales; bool redraw = true; TEST_PLUGIN_API(api); rb = api; (void)parameter; /* This plugin uses the grayscale framework, so initialize */ gray_init(api); /* get the remainder of the plugin buffer */ gbuf = (unsigned char *) rb->plugin_get_buffer(&gbuf_size); /* initialize the grayscale buffer: * 112 pixels wide, 8 rows (64 pixels) high, (try to) reserve * 16 bitplanes for 17 shades of gray.*/ grayscales = gray_init_buffer(gbuf, gbuf_size, 112, 8, 16, NULL) + 1; if (grayscales != 17){ rb->snprintf(buff, sizeof(buff), "%d", grayscales); rb->lcd_puts(0, 1, buff); rb->lcd_update(); rb->sleep(HZ*2); return(0); } gray_show_display(true); /* switch on grayscale overlay */ init_mandelbrot_set(); lcd_aspect_ratio = ((LCD_WIDTH<<13) / LCD_HEIGHT)<<13; /* main loop */ while (true){ if(redraw) calc_mandelbrot_set(); redraw = false; button = rb->button_get(true); switch (button) { case MANDELBROT_QUIT: gray_release_buffer(); return PLUGIN_OK; case MANDELBROT_ZOOM_OUT: x_min -= ((delta>>13)*(lcd_aspect_ratio>>13)); x_max += ((delta>>13)*(lcd_aspect_ratio>>13)); y_min -= delta; y_max += delta; delta = (x_max - x_min) >> 3; redraw = true; break; case MANDELBROT_ZOOM_IN: #ifdef MANDELBROT_ZOOM_IN_PRE if (lastbutton != MANDELBROT_ZOOM_IN_PRE) break; #endif #ifdef MANDELBROT_ZOOM_IN2 case MANDELBROT_ZOOM_IN2: #endif x_min += ((delta>>13)*(lcd_aspect_ratio>>13)); x_max -= ((delta>>13)*(lcd_aspect_ratio>>13)); y_min += delta; y_max -= delta; delta = (x_max - x_min) >> 3; redraw = true; break; case BUTTON_UP: y_min -= delta; y_max -= delta; redraw = true; break; case BUTTON_DOWN: y_min += delta; y_max += delta; redraw = true; break; case BUTTON_LEFT: x_min -= delta; x_max -= delta; redraw = true; break; case BUTTON_RIGHT: x_min += delta; x_max += delta; redraw = true; break; case MANDELBROT_MAXITER_DEC: if (max_iter>5){ max_iter -= 5; redraw = true; } break; case MANDELBROT_MAXITER_INC: if (max_iter < 195){ max_iter += 5; redraw = true; } break; case MANDELBROT_RESET: init_mandelbrot_set(); redraw = true; break; default: if (rb->default_event_handler_ex(button, cleanup, NULL) == SYS_USB_CONNECTED) return PLUGIN_USB_CONNECTED; break; } if (button != BUTTON_NONE) lastbutton = button; } gray_release_buffer(); return PLUGIN_OK; } #endif #endif