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#include <stdlib.h>
#include <time.h>
#include "fb.h"
#include "rototiller.h"
#include "settings.h"
#include "txt/txt.h"
#include "util.h"
/* Copyright (C) 2019 - Vito Caputo <vcaputo@pengaru.com> */
/* This implements an MTV-inspired random slideshow of rototiller modules.
*
* Eventually it'd be nice to have it show a caption every time a new
* module starts overlaying the name, author, license, etc.
*
* Some TODO items:
* - optionally persist module contexts so they resume rather than restart
* - runtime-configurable duration
* - redo the next module selection from random to
* walking the list and randomizing the list every
* time it completes a cycle. The current dumb
* random technique will happily keep showing you the
* same thing over and over.
*/
#define RTV_SNOW_DURATION_SECS 1
#define RTV_DURATION_SECS 15
#define RTV_CAPTION_DURATION_SECS 5
typedef struct rtv_context_t {
const rototiller_module_t **modules;
size_t n_modules;
time_t next_switch, next_hide_caption;
const rototiller_module_t *module, *last_module;
void *module_ctxt;
txt_t *caption;
const rototiller_module_t *snow_module;
} rtv_context_t;
static void setup_next_module(rtv_context_t *ctxt);
static void * rtv_create_context(void);
static void rtv_destroy_context(void *context);
static void rtv_prepare_frame(void *context, unsigned n_cpus, fb_fragment_t *fragment, rototiller_fragmenter_t *res_fragmenter);
static void rtv_finish_frame(void *context, fb_fragment_t *fragment);
rototiller_module_t rtv_module = {
.create_context = rtv_create_context,
.destroy_context = rtv_destroy_context,
.prepare_frame = rtv_prepare_frame,
.finish_frame = rtv_finish_frame,
.name = "rtv",
.description = "Rototiller TV",
.author = "Vito Caputo <vcaputo@pengaru.com>",
.license = "GPLv2",
};
static char * randomize_module_setup(const rototiller_module_t *module)
{
settings_t *settings;
setting_desc_t *desc;
char *arg;
if (!module->setup)
return NULL;
settings = settings_new(NULL);
if (!settings)
return NULL;
while (module->setup(settings, &desc) > 0) {
if (desc->values) {
int n;
for (n = 0; desc->values[n]; n++);
n = rand() % n;
settings_add_value(settings, desc->key, desc->values[n]);
} else {
/* TODO: only randomizing multiple choice currently, so
* here I'm always taking the default for now.
*/
settings_add_value(settings, desc->key, desc->preferred);
}
setting_desc_free(desc);
}
arg = settings_as_arg(settings);
settings_free(settings);
return arg;
}
static void setup_next_module(rtv_context_t *ctxt)
{
time_t now = time(NULL);
int i;
/* TODO: most of this module stuff should probably be
* in rototiller.c helpers, but it's harmless for now.
*/
if (ctxt->module) {
if (ctxt->module->destroy_context)
ctxt->module->destroy_context(ctxt->module_ctxt);
ctxt->module_ctxt = NULL;
ctxt->caption = txt_free(ctxt->caption);
}
if (ctxt->module != ctxt->snow_module) {
ctxt->last_module = ctxt->module;
ctxt->module = ctxt->snow_module;
ctxt->next_switch = now + RTV_SNOW_DURATION_SECS;
} else {
char *setup;
do {
i = rand() % ctxt->n_modules;
} while (ctxt->modules[i] == &rtv_module ||
ctxt->modules[i] == ctxt->last_module ||
ctxt->modules[i] == ctxt->snow_module);
ctxt->module = ctxt->modules[i];
setup = randomize_module_setup(ctxt->module);
ctxt->caption = txt_newf("Title: %s\nAuthor: %s\nDescription: %s\nLicense: %s%s%s",
ctxt->module->name,
ctxt->module->author,
ctxt->module->description,
ctxt->module->license,
setup ? "\nSettings: " : "",
setup ? setup : "");
free(setup);
ctxt->next_switch = now + RTV_DURATION_SECS;
ctxt->next_hide_caption = now + RTV_CAPTION_DURATION_SECS;
}
if (ctxt->module->create_context)
ctxt->module_ctxt = ctxt->module->create_context();
}
static void * rtv_create_context(void)
{
rtv_context_t *ctxt = calloc(1, sizeof(rtv_context_t));
ctxt->snow_module = rototiller_lookup_module("snow");
rototiller_get_modules(&ctxt->modules, &ctxt->n_modules);
setup_next_module(ctxt);
return ctxt;
}
static void rtv_destroy_context(void *context)
{
free(context);
}
static void rtv_prepare_frame(void *context, unsigned n_cpus, fb_fragment_t *fragment, rototiller_fragmenter_t *res_fragmenter)
{
rtv_context_t *ctxt = context;
time_t now = time(NULL);
if (now >= ctxt->next_switch)
setup_next_module(ctxt);
if (now >= ctxt->next_hide_caption)
ctxt->caption = txt_free(ctxt->caption);
rototiller_module_render(ctxt->module, ctxt->module_ctxt, fragment);
}
static void rtv_finish_frame(void *context, fb_fragment_t *fragment)
{
rtv_context_t *ctxt = context;
if (!ctxt->caption)
return;
txt_render_fragment(ctxt->caption, fragment, 0x00000000,
1, fragment->frame_height + 1,
(txt_align_t){
.horiz = TXT_HALIGN_LEFT,
.vert = TXT_VALIGN_BOTTOM
});
txt_render_fragment(ctxt->caption, fragment, 0xffffffff,
0, fragment->frame_height,
(txt_align_t){
.horiz = TXT_HALIGN_LEFT,
.vert = TXT_VALIGN_BOTTOM
});
}
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