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