/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2005 Kevin Ferrare * * Fire demo plugin * * 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 (grayscale) */ #include "plugin.h" #ifdef HAVE_LCD_BITMAP /* and also not for the Player */ #include "gray.h" PLUGIN_HEADER /******************************* Globals ***********************************/ static struct plugin_api* rb; /* global api struct pointer */ static unsigned char *gbuf; static unsigned int gbuf_size = 0; static unsigned char fire[LCD_HEIGHT+3][LCD_WIDTH]; static unsigned char cooling_map[LCD_HEIGHT][LCD_WIDTH]; static unsigned char draw_buffer[8*LCD_WIDTH]; /* Key assignement */ #define FIRE_QUIT BUTTON_OFF #define FIRE_INCREASE_MULT BUTTON_UP #define FIRE_DECREASE_MULT BUTTON_DOWN #if CONFIG_KEYPAD == IRIVER_H100_PAD #define FIRE_SWITCH_FLAMES_TYPE BUTTON_MODE #define FIRE_SWITCH_FLAMES_MOVING BUTTON_REC #elif CONFIG_KEYPAD == RECORDER_PAD #define FIRE_SWITCH_FLAMES_TYPE BUTTON_ON #define FIRE_SWITCH_FLAMES_MOVING BUTTON_PLAY #elif CONFIG_KEYPAD == ONDIO_PAD #define FIRE_SWITCH_FLAMES_TYPE BUTTON_MENU #define FIRE_SWITCH_FLAMES_MOVING BUTTON_RIGHT #endif #define MIN_FLAME_VALUE 0 #if LCD_HEIGHT > 64 #define COOL_MAX 5 #else #define COOL_MAX 8 #endif /* unsigned 16 bit multiplication (a single instruction on the SH) */ #define MULU16(a, b) ((unsigned long) \ (((unsigned short) (a)) * ((unsigned short) (b)))) static unsigned char palette[255]= {/* logarithmic histogram equalisation */ 0, 15, 31, 50, 63, 74, 82, 89, 95, 101, 105, 110, 114, 118, 121, 124, 127, 130, 133, 135, 137, 140, 142, 144, 146, 148, 149, 151, 153, 154, 156, 158, 159, 160, 162, 163, 164, 166, 167, 168, 169, 170, 172, 173, 174, 175, 176, 177, 178, 179, 180, 180, 181, 182, 183, 184, 185, 186, 186, 187, 188, 189, 189, 190, 191, 192, 192, 193, 194, 194, 195, 196, 196, 197, 198, 198, 199, 199, 200, 201, 201, 202, 202, 203, 203, 204, 204, 205, 206, 206, 207, 207, 208, 208, 209, 209, 210, 210, 210, 211, 211, 212, 212, 213, 213, 214, 214, 215, 215, 215, 216, 216, 217, 217, 217, 218, 218, 219, 219, 219, 220, 220, 221, 221, 221, 222, 222, 222, 223, 223, 223, 224, 224, 225, 225, 225, 226, 226, 226, 227, 227, 227, 228, 228, 228, 229, 229, 229, 229, 230, 230, 230, 231, 231, 231, 232, 232, 232, 232, 233, 233, 233, 234, 234, 234, 234, 235, 235, 235, 236, 236, 236, 236, 237, 237, 237, 237, 238, 238, 238, 238, 239, 239, 239, 239, 240, 240, 240, 240, 241, 241, 241, 241, 242, 242, 242, 242, 243, 243, 243, 243, 244, 244, 244, 244, 244, 245, 245, 245, 245, 246, 246, 246, 246, 246, 247, 247, 247, 247, 247, 248, 248, 248, 248, 249, 249, 249, 249, 249, 250, 250, 250, 250, 250, 251, 251, 251, 251, 251, 252, 252, 252, 252, 252, 252, 253, 253, 253, 253, 253, 254, 254, 254, 254, 254 }; static inline void tab_init_rand(unsigned char *tab, unsigned int tab_size, int rand_max) { unsigned char *end = tab + tab_size; while(tab < end) *tab++ = (unsigned char)rb->rand() % rand_max; } static inline void fire_generate(int mult, int flames_type, bool moving) { unsigned int pixel_value = 0; /* stop the compiler complaining */ unsigned int cooling_value; unsigned char *ptr, *end, *cool; /* Randomize the bottom line */ if(moving) {/* moving must be true the first time the function is called */ ptr = &fire[LCD_HEIGHT][0]; end = ptr + LCD_WIDTH; do { *ptr++ = (MIN_FLAME_VALUE + rb->rand() % (256-MIN_FLAME_VALUE)); } while (ptr < end); } rb->yield(); /* Convolve the pixels and handle cooling (to add nice shapes effects later) */ cool = &cooling_map[0][0]; ptr = &fire[0][0]; end = ptr + LCD_HEIGHT*LCD_WIDTH; switch (flames_type) { case 0: do { pixel_value = ptr[LCD_WIDTH-1] /* fire[y+1][x-1] */ + ptr[2*LCD_WIDTH] /* fire[y+2][x] */ + ptr[LCD_WIDTH+1] /* fire[y+1][x+1] */ + ptr[3*LCD_WIDTH]; /* fire[y+3][x] */ pixel_value = MULU16(pixel_value, mult) >> 10; cooling_value = *cool++; if (cooling_value <= pixel_value) pixel_value -= cooling_value; /* else it's too cold, don't frost the pixels !!! */ if (pixel_value > 255) pixel_value = 255; *ptr++ = pixel_value; } while (ptr < end); break; case 1: do { pixel_value = ptr[LCD_WIDTH-1] /* fire[y+1][x-1] */ + ptr[LCD_WIDTH] /* fire[y+1][x] */ + ptr[LCD_WIDTH+1] /* fire[y+1][x+1] */ + ptr[2*LCD_WIDTH]; /* fire[y+2][x] */ pixel_value = MULU16(pixel_value, mult) >> 10; cooling_value = *cool++; if (cooling_value <= pixel_value) pixel_value -= cooling_value; /* else it's too cold, don't frost the pixels !!! */ if (pixel_value > 255) pixel_value = 255; *ptr++ = pixel_value; } while (ptr < end); break; default: /* We should never reach this */ break; } rb->yield(); } static inline void fire_draw(void) { int block; unsigned char *dest, *end; unsigned char *src = &fire[0][0]; for (block = 0; block < LCD_HEIGHT; block += 8) { dest = draw_buffer; end = dest + 8*LCD_WIDTH; do *dest++ = palette[*src++]; while(dest < end); gray_ub_gray_bitmap(draw_buffer, 0, block, LCD_WIDTH, 8); } } void cleanup(void *parameter) { (void)parameter; #if !defined(SIMULATOR) && defined(HAVE_ADJUSTABLE_CPU_FREQ) rb->cpu_boost(false); #endif gray_release(); rb->backlight_set_timeout(rb->global_settings->backlight_timeout); } /* * Main function that also contain the main plasma * algorithm. */ int main(void) { int shades, button; int mult = 261; int flames_type=0; bool moving=true; /* get the remainder of the plugin buffer */ gbuf = (unsigned char *) rb->plugin_get_buffer(&gbuf_size); shades = gray_init(rb, gbuf, gbuf_size, false, LCD_WIDTH, LCD_HEIGHT/8, 32, NULL) + 1; if(shades <= 1) { rb->splash(HZ, true, "not enougth memory"); return PLUGIN_ERROR; } #if !defined(SIMULATOR) && defined(HAVE_ADJUSTABLE_CPU_FREQ) rb->cpu_boost(true); #endif /* switch on grayscale overlay */ gray_show(true); rb->memset(&fire[0][0], 0, sizeof(fire)); tab_init_rand(&cooling_map[0][0], LCD_HEIGHT*LCD_WIDTH, COOL_MAX); while (true) { fire_generate(mult, flames_type, moving); fire_draw(); rb->yield(); button = rb->button_get(false); switch(button) { case(FIRE_QUIT): cleanup(NULL); return PLUGIN_OK; break; case (FIRE_INCREASE_MULT): ++mult; break; case (FIRE_DECREASE_MULT): if (mult > 0) --mult; break; case (FIRE_SWITCH_FLAMES_TYPE): flames_type = (flames_type + 1) % 2; break; case (FIRE_SWITCH_FLAMES_MOVING): moving = !moving; break; default: if (rb->default_event_handler_ex(button, cleanup, NULL) == SYS_USB_CONNECTED) return PLUGIN_USB_CONNECTED; break; } } } /*************************** Plugin entry point ****************************/ enum plugin_status plugin_start(struct plugin_api* api, void* parameter) { int ret; rb = api; // copy to global api pointer (void)parameter; if (rb->global_settings->backlight_timeout > 0) rb->backlight_set_timeout(1);/* keep the light on */ ret = main(); return ret; } #endif // #ifdef HAVE_LCD_BITMAP #endif // #ifndef SIMULATOR