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#include <math.h>
#include <stdlib.h>
#include <time.h>
#include "fb.h"
#include "rototiller.h"
#include "settings.h"
#include "util.h"
/* Copyright (C) 2019 - Vito Caputo <vcaputo@pengaru.com> */
typedef struct montage_context_t {
const rototiller_module_t **modules;
void **contexts;
size_t n_modules;
unsigned n_cpus;
} montage_context_t;
static void setup_next_module(montage_context_t *ctxt);
static void * montage_create_context(unsigned num_cpus);
static void montage_destroy_context(void *context);
static void montage_prepare_frame(void *context, unsigned n_cpus, fb_fragment_t *fragment, rototiller_fragmenter_t *res_fragmenter);
static void montage_render_fragment(void *context, unsigned cpu, fb_fragment_t *fragment);
rototiller_module_t montage_module = {
.create_context = montage_create_context,
.destroy_context = montage_destroy_context,
.prepare_frame = montage_prepare_frame,
.render_fragment = montage_render_fragment,
.name = "montage",
.description = "Rototiller montage",
.author = "Vito Caputo <vcaputo@pengaru.com>",
.license = "GPLv2",
};
static void * montage_create_context(unsigned num_cpus)
{
const rototiller_module_t **modules, *rtv_module, *pixbounce_module, *stars_module;
size_t n_modules;
montage_context_t *ctxt;
ctxt = calloc(1, sizeof(montage_context_t));
if (!ctxt)
return NULL;
rototiller_get_modules(&modules, &n_modules);
ctxt->modules = calloc(n_modules, sizeof(rototiller_module_t *));
if (!ctxt->modules) {
free(ctxt);
return NULL;
}
rtv_module = rototiller_lookup_module("rtv");
pixbounce_module = rototiller_lookup_module("pixbounce");
stars_module = rototiller_lookup_module("stars");
for (size_t i = 0; i < n_modules; i++) {
const rototiller_module_t *module = modules[i];
if (module == &montage_module || /* prevents recursion */
module == rtv_module || /* also prevents recursion, rtv can run montage */
module == pixbounce_module || /* temporarily broken in montage */
module == stars_module) /* temporarily broken in montage */
continue;
ctxt->modules[ctxt->n_modules++] = module;
}
ctxt->n_cpus = num_cpus;
ctxt->contexts = calloc(ctxt->n_modules, sizeof(void *));
if (!ctxt->contexts) {
free(ctxt);
return NULL;
}
for (size_t i = 0; i < ctxt->n_modules; i++) {
const rototiller_module_t *module = ctxt->modules[i];
if (module->create_context) /* FIXME errors */
ctxt->contexts[i] = module->create_context(num_cpus);
}
return ctxt;
}
static void montage_destroy_context(void *context)
{
montage_context_t *ctxt = context;
for (int i = 0; i < ctxt->n_modules; i++) {
const rototiller_module_t *module = ctxt->modules[i];
if (!ctxt->contexts[i])
continue;
module->destroy_context(ctxt->contexts[i]);
}
free(ctxt->contexts);
free(ctxt->modules);
free(ctxt);
}
/* The fragmenter in montage is serving double-duty:
* 1. it divides the frame into subfragments for threaded rendering
* 2. it determines which modules will be rendered where via fragment->number
*/
static int montage_fragmenter(void *context, const fb_fragment_t *fragment, unsigned number, fb_fragment_t *res_fragment)
{
montage_context_t *ctxt = context;
float root = sqrtf((float)ctxt->n_modules);
int ret;
ret = fb_fragment_tile_single(fragment, fragment->frame_height / root, number, res_fragment);
if (!ret)
return 0;
/* as these tiles are frames of their own rather than subfragments, override these values */
res_fragment->x = res_fragment->y = 0;
res_fragment->frame_width = res_fragment->width;
res_fragment->frame_height = res_fragment->height;
return ret;
}
static void montage_prepare_frame(void *context, unsigned n_cpus, fb_fragment_t *fragment, rototiller_fragmenter_t *res_fragmenter)
{
montage_context_t *ctxt = context;
*res_fragmenter = montage_fragmenter;
}
static void montage_render_fragment(void *context, unsigned cpu, fb_fragment_t *fragment)
{
montage_context_t *ctxt = context;
const rototiller_module_t *module = ctxt->modules[fragment->number];
if (fragment->number >= ctxt->n_modules) {
fb_fragment_zero(fragment);
return;
}
/* since we're *already* in a threaded render of tiles, no further
* threading within the montage tiles is desirable, so the per-module
* render is done explicitly serially here in an open-coded ad-hoc
* fashion for now. FIXME TODO: move this into rototiller.c
*/
if (module->prepare_frame) {
rototiller_fragmenter_t unused;
/* XXX FIXME: ignoring the fragmenter here is a violation of the module API,
* rototiller.c should have a module render interface with explicit non-threading
* that still does all the necessary fragmenting as needed.
*
* Today, I can get away with this, because montage is the only module that's
* sensitive to this aspect of the API and it skips itself.
*/
module->prepare_frame(ctxt->contexts[fragment->number], 1, fragment, &unused);
}
if (module->render_fragment)
module->render_fragment(ctxt->contexts[fragment->number], 0, fragment);
}
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