df8749d6d7
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16987 a1c6a512-1295-4272-9138-f99709370657
364 lines
9.4 KiB
C
364 lines
9.4 KiB
C
/***************************************************************************
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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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#include "plugin.h"
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#include "helper.h"
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#ifdef HAVE_LCD_BITMAP
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#include "pluginlib_actions.h"
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#include "fixedpoint.h"
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#ifndef HAVE_LCD_COLOR
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#include "grey.h"
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#endif
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#if (LCD_WIDTH == 112) && (LCD_HEIGHT == 64)
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/* Archos has not enough plugin RAM for full-width fire :( */
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#define FIRE_WIDTH 106
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#define FIRE_XPOS 3
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#else
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#define FIRE_WIDTH LCD_WIDTH
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#define FIRE_XPOS 0
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#endif
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PLUGIN_HEADER
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static struct plugin_api* rb; /* global api struct pointer */
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#ifndef HAVE_LCD_COLOR
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GREY_INFO_STRUCT
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static unsigned char draw_buffer[FIRE_WIDTH];
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#endif
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/* Key assignement */
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const struct button_mapping* plugin_contexts[]= {
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generic_increase_decrease,
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generic_directions,
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#if defined(HAVE_REMOTE_LCD)
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remote_directions,
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#endif
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generic_actions
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};
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#define PLA_ARRAY_COUNT sizeof(plugin_contexts)/sizeof(plugin_contexts[0])
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#define FIRE_QUIT PLA_QUIT
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#define FIRE_SWITCH_FLAMES_TYPE PLA_LEFT
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#define FIRE_SWITCH_FLAMES_MOVING PLA_RIGHT
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#define FIRE_INCREASE_MULT PLA_INC
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#define FIRE_DECREASE_MULT PLA_DEC
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#define MIN_FLAME_VALUE 0
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#define COOL_MAX (440/LCD_HEIGHT+2)
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#ifndef HAVE_LCD_COLOR
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static unsigned char palette[256];
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void color_palette_init(unsigned char* palette)
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{
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int i;
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for(i=0;i<=160;i++)//palette[i]=(3/2)*i
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palette[i]=(i*3)/2;
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/* 'regular' fire doesn't exceed this value */
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for(;i<=255;i++)//palette[i]=(3/20)*i+216
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palette[i]=(i*3+20*217)/20;
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}
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#else
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static fb_data palette[256];
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/*
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* Color palette generation algorithm taken from
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* the "The Demo Effects Collection" GPL project
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* Copyright (C) 2002 W.P. van Paassen
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*/
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void color_palette_init(fb_data* palette)
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{
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int i;
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for (i = 0; i < 32; i++){
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/* black to blue, 32 values*/
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palette[i]=LCD_RGBPACK(0, 0, 2*i);
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/* blue to red, 32 values*/
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palette[i + 32]=LCD_RGBPACK(8*i, 0, 64 - 2*i);
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/* red to yellow, 32 values*/
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palette[i + 64]=LCD_RGBPACK(255, 8*i, 0);
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/* yellow to white, 162 values */
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palette[i + 96]=LCD_RGBPACK(255, 255, 0 + 4*i);
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palette[i + 128]=LCD_RGBPACK(255, 255, 64 + 4*i);
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palette[i + 160]=LCD_RGBPACK(255, 255, 128 + 4*i);
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palette[i + 192]=LCD_RGBPACK(255, 255, 192 + i);
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palette[i + 224]=LCD_RGBPACK(255, 255, 224 + i);
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}
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}
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#endif
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static 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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struct fire {
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unsigned char fire[LCD_HEIGHT+3][FIRE_WIDTH];
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unsigned char cooling_map[LCD_HEIGHT][FIRE_WIDTH];
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int flames_type;
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bool moving;
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unsigned int mult;
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};
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/* makes the instance a global variable since it's too big to fit on the target's stack */
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static struct fire fire;
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static inline void fire_convolve(struct fire* fire)
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{
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unsigned int pixel_value;
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unsigned int cooling_value;
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unsigned char *ptr, *end, *cool;
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unsigned int mult=fire->mult;
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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 = &fire->cooling_map[0][0];
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ptr = &fire->fire[0][0];
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end = ptr + LCD_HEIGHT*FIRE_WIDTH;
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switch (fire->flames_type){
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case 0:
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do{
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pixel_value = ptr[FIRE_WIDTH-1] /* fire[y+1][x-1] */
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+ ptr[2*FIRE_WIDTH] /* fire[y+2][x] */
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+ ptr[FIRE_WIDTH+1] /* fire[y+1][x+1] */
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+ ptr[3*FIRE_WIDTH]; /* fire[y+3][x] */
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pixel_value = FMULU(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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}while (ptr < end);
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break;
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case 1:
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mult -= 2;
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do{
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pixel_value = ptr[FIRE_WIDTH-1] /* fire[y+1][x-1] */
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+ ptr[FIRE_WIDTH] /* fire[y+1][x] */
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+ ptr[FIRE_WIDTH+1] /* fire[y+1][x+1] */
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+ ptr[2*FIRE_WIDTH]; /* fire[y+2][x] */
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pixel_value = FMULU(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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}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 void fire_generate_bottom_seed(struct fire* fire)
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{
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unsigned char *ptr, *end;
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ptr = &fire->fire[LCD_HEIGHT][0];
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end = ptr + FIRE_WIDTH;
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do{
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*ptr++ = (MIN_FLAME_VALUE + rb->rand() % (256-MIN_FLAME_VALUE));
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}while (ptr < end);
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}
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static inline void fire_step(struct fire* fire)
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{
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if(fire->moving){
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/* Randomize the bottom line */
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fire_generate_bottom_seed(fire);
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/* Add here further effects like fire letters, ball ... */
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}
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fire_convolve(fire);
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}
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static void fire_init(struct fire* fire)
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{
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fire->mult = 261;
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fire->flames_type=0;
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fire->moving=true;
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rb->memset(&fire->fire[0][0], 0, sizeof(fire->fire));
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tab_init_rand(&fire->cooling_map[0][0], LCD_HEIGHT*FIRE_WIDTH, COOL_MAX);
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fire_generate_bottom_seed(fire);
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}
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static inline void fire_draw(struct fire* fire)
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{
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int y;
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unsigned char *src = &fire->fire[0][0];
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#ifndef HAVE_LCD_COLOR
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unsigned char *dest, *end;
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#else
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fb_data *dest, *end;
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#endif
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for (y = 0; y < LCD_HEIGHT; y++){
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#ifndef HAVE_LCD_COLOR
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dest = draw_buffer;
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#else
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dest = rb->lcd_framebuffer + LCD_WIDTH * y + FIRE_XPOS;
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#endif
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end = dest + FIRE_WIDTH;
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do
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*dest++ = palette[*src++];
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while (dest < end);
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#ifndef HAVE_LCD_COLOR
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grey_ub_gray_bitmap(draw_buffer, 0, y, FIRE_WIDTH, 1);
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#endif
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}
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#ifdef HAVE_LCD_COLOR
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rb->lcd_update();
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#endif
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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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#ifdef HAVE_ADJUSTABLE_CPU_FREQ
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rb->cpu_boost(false);
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#endif
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#ifndef HAVE_LCD_COLOR
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grey_release();
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#endif
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/* Turn on backlight timeout (revert to settings) */
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backlight_use_settings(rb); /* backlight control in lib/helper.c */
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}
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#ifndef HAVE_LCD_COLOR
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int init_grey(void)
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{
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unsigned char *gbuf;
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size_t gbuf_size = 0;
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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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if (!grey_init(rb, gbuf, gbuf_size, GREY_ON_COP,
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FIRE_WIDTH, LCD_HEIGHT, NULL)){
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rb->splash(HZ, "not enough memory");
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return PLUGIN_ERROR;
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}
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/* switch on greyscale overlay */
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grey_set_position(FIRE_XPOS, 0);
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grey_show(true);
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return PLUGIN_OK;
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}
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#endif
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int main(void)
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{
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int action;
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#ifndef HAVE_LCD_COLOR
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if(init_grey()!=PLUGIN_OK)
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return(PLUGIN_ERROR);
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#endif
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color_palette_init(palette);
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#ifdef HAVE_ADJUSTABLE_CPU_FREQ
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rb->cpu_boost(true);
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#endif
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fire_init(&fire);
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while (true){
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fire_step(&fire);
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fire_draw(&fire);
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rb->yield();
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action = pluginlib_getaction(rb, 0, plugin_contexts, PLA_ARRAY_COUNT);
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switch(action){
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case FIRE_QUIT:
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cleanup(NULL);
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return PLUGIN_OK;
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case FIRE_INCREASE_MULT:
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++fire.mult;
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break;
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case FIRE_DECREASE_MULT:
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if (fire.mult > 0)
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--fire.mult;
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break;
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case FIRE_SWITCH_FLAMES_TYPE:
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fire.flames_type = (fire.flames_type + 1) % 2;
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break;
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case FIRE_SWITCH_FLAMES_MOVING:
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fire.moving = !fire.moving;
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break;
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default:
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if (rb->default_event_handler_ex(action, cleanup, NULL)
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== SYS_USB_CONNECTED)
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return PLUGIN_USB_CONNECTED;
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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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rb = api; //copy to global api pointer
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(void)parameter;
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#if LCD_DEPTH > 1
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rb->lcd_set_backdrop(NULL);
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#endif
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/* Turn off backlight timeout */
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backlight_force_on(rb); /* backlight control in lib/helper.c */
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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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