diff options
| -rw-r--r-- | src/modules/pixbounce/pixbounce.c | 111 |
1 files changed, 71 insertions, 40 deletions
diff --git a/src/modules/pixbounce/pixbounce.c b/src/modules/pixbounce/pixbounce.c index bfc7693..c5697cc 100644 --- a/src/modules/pixbounce/pixbounce.c +++ b/src/modules/pixbounce/pixbounce.c @@ -5,7 +5,7 @@ #include "draw.h" #include "rototiller.h" -/* Copyright (C) 2018 Philip J. Freeman <elektron@halo.nu> */ +/* Copyright (C) 2018-19 Philip J. Freeman <elektron@halo.nu> */ int pix_width = 16; int pix_height = 16; @@ -90,6 +90,14 @@ char pix_map[][16*16] = { }, }; +typedef struct pixbounce_context_t { + unsigned n_cpus; + int x, y; + int x_dir, y_dir; + int pix_num; + +} pixbounce_context_t; + /* randomly pick another pixmap from the list, excluding the current one. */ static int pick_pix(int num_pics, int last_pic) { @@ -101,69 +109,92 @@ static int pick_pix(int num_pics, int last_pic) return pix_num; } +static void * pixbounce_create_context(unsigned num_cpus) +{ + pixbounce_context_t *ctxt; + + ctxt = malloc(sizeof(pixbounce_context_t)); + if (!ctxt) + return NULL; + + srand(time(NULL) + getpid()); + + ctxt->n_cpus = num_cpus; + ctxt->x = 0; + ctxt->y = 8; + ctxt->x_dir = 1; + ctxt->y_dir = 1; + ctxt->pix_num = rand() % num_pix; + + return ctxt; +} + +static void pixbounce_destroy_context(void *context) +{ + pixbounce_context_t *ctxt = context; + free(context); +} + static void pixbounce_render_fragment(void *context, unsigned cpu, fb_fragment_t *fragment) { - static int initialized=0; - static int x, y, multiplier; - static int x_dir, y_dir; - static int pix_num; - - int width = fragment->width, height = fragment->height; - - if(!initialized) { - srand(time(NULL) + getpid()); - int multiplier_x = width / pix_width; - int multiplier_y = height / pix_height; - if(multiplier_x>multiplier_y) { - multiplier = multiplier_y * 77 / 100; - } else if(multiplier_y>multiplier_x) { - multiplier = multiplier_x * 77 / 100; - } - x = rand()%(width - (pix_width * multiplier)); - y = rand()%(height - (pix_height * multiplier)); - pix_num = rand() % num_pix; - x_dir = 1; - y_dir = 1; - initialized = 1; - } + pixbounce_context_t *ctxt = context; + + int multiplier_x, multiplier_y, multiplier; + int width = fragment->width, height = fragment->height; /* blank the frame */ fb_fragment_zero(fragment); + /* check for very small fragment */ + if(pix_width*2>width||pix_height*2>height) + return; + + /* calculate multiplyer for the pixmap */ + multiplier_x = width / pix_width; + multiplier_y = height / pix_height; + + if(multiplier_x>=multiplier_y) { + multiplier = multiplier_y * 77 / 100; + } else if(multiplier_y>multiplier_x) { + multiplier = multiplier_x * 77 / 100; + } + /* translate pixmap to multiplier size and draw it to the fragment */ for(int cursor_y=0; cursor_y < pix_height*multiplier; cursor_y++) { for(int cursor_x=0; cursor_x < pix_width*multiplier; cursor_x++) { int pix_offset = ((cursor_y/multiplier)*pix_width) + (cursor_x/multiplier); - if(pix_map[pix_num][pix_offset] == 0) continue; + if(pix_map[ctxt->pix_num][pix_offset] == 0) continue; fb_fragment_put_pixel_unchecked( - fragment, x+cursor_x, y+cursor_y, + fragment, ctxt->x+cursor_x, ctxt->y+cursor_y, makergb(0xFF, 0xFF, 0xFF, 1) ); } } /* update pixmap location */ - if(x+x_dir < 0) { - x_dir = 1; - pix_num = pick_pix(num_pix, pix_num); + if(ctxt->x+ctxt->x_dir < 0) { + ctxt->x_dir = 1; + ctxt->pix_num = pick_pix(num_pix, ctxt->pix_num); } - if((x+(pix_width*multiplier))+x_dir > width) { - x_dir = -1; - pix_num = pick_pix(num_pix, pix_num); + if((ctxt->x+(pix_width*multiplier))+ctxt->x_dir > width) { + ctxt->x_dir = -1; + ctxt->pix_num = pick_pix(num_pix, ctxt->pix_num); } - if(y+y_dir < 0) { - y_dir = 1; - pix_num = pick_pix(num_pix, pix_num); + if(ctxt->y+ctxt->y_dir < 0) { + ctxt->y_dir = 1; + ctxt->pix_num = pick_pix(num_pix, ctxt->pix_num); } - if((y+(pix_height*multiplier))+y_dir > height) { - y_dir = -1; - pix_num = pick_pix(num_pix, pix_num); + if((ctxt->y+(pix_height*multiplier))+ctxt->y_dir > height) { + ctxt->y_dir = -1; + ctxt->pix_num = pick_pix(num_pix, ctxt->pix_num); } - x = x+x_dir; - y = y+y_dir; + ctxt->x = ctxt->x+ctxt->x_dir; + ctxt->y = ctxt->y+ctxt->y_dir; } rototiller_module_t pixbounce_module = { + .create_context = pixbounce_create_context, + .destroy_context = pixbounce_destroy_context, .render_fragment = pixbounce_render_fragment, .name = "pixbounce", .description = "pixmap bounce", |