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#include <assert.h>
#include <stdlib.h>
#include "til_fb.h"
#include "til_settings.h"
#include "til_util.h"
/* dummy mem_fb backend; render to anonymous memory */
/* useful for testing/debugging, and benchmarking systems even if headless */
typedef struct mem_fb_page_t mem_fb_page_t;
struct mem_fb_page_t {
void *unused;
uint32_t buf[];
};
typedef struct mem_fb_setup_t {
til_setup_t til_setup;
unsigned width, height;
} mem_fb_setup_t;
typedef struct mem_fb_t {
mem_fb_setup_t setup;
} mem_fb_t;
static int mem_fb_setup(const til_settings_t *settings, til_setting_t **res_setting, const til_setting_desc_t **res_desc, til_setup_t **res_setup)
{
const char *size;
int r;
r = til_settings_get_and_describe_value(settings,
&(til_setting_desc_t){
.name = "Virtual window size",
.key = "size",
.regex = "[1-9][0-9]*[xX][1-9][0-9]*",
.preferred = "640x480",
.values = NULL,
.annotations = NULL
},
&size,
res_setting,
res_desc);
if (r)
return r;
if (res_setup) {
mem_fb_setup_t *setup;
setup = til_setup_new(sizeof(*setup), (void(*)(til_setup_t *))free);
if (!setup)
return -ENOMEM;
/* TODO FIXME: parse errors */
sscanf(size, "%ux%u", &setup->width, &setup->height);
*res_setup = &setup->til_setup;
}
return 0;
}
static int mem_fb_init(const til_setup_t *setup, void **res_context)
{
mem_fb_t *c;
int r;
assert(setup);
assert(res_context);
c = calloc(1, sizeof(mem_fb_t));
if (!c) {
r = -ENOMEM;
goto _err;
}
c->setup = *(mem_fb_setup_t *)setup;
*res_context = c;
return 0;
_err:
return r;
}
static void mem_fb_shutdown(til_fb_t *fb, void *context)
{
mem_fb_t *c = context;
assert(c);
free(c);
}
static int mem_fb_acquire(til_fb_t *fb, void *context, void *page)
{
mem_fb_t *c = context;
mem_fb_page_t *p = page;
return 0;
}
static void mem_fb_release(til_fb_t *fb, void *context)
{
}
static void * mem_fb_page_alloc(til_fb_t *fb, void *context, til_fb_page_t *res_page)
{
mem_fb_t *c = context;
mem_fb_page_t *p;
p = calloc(1, sizeof(mem_fb_page_t) + c->setup.width * c->setup.height * sizeof(uint32_t));
if (!p)
return NULL;
*res_page = (til_fb_page_t){
.fragment.buf = p->buf,
.fragment.width = c->setup.width,
.fragment.frame_width = c->setup.width,
.fragment.height = c->setup.height,
.fragment.frame_height = c->setup.height,
.fragment.pitch = c->setup.width,
};
return p;
}
static int mem_fb_page_free(til_fb_t *fb, void *context, void *page)
{
mem_fb_t *c = context;
mem_fb_page_t *p = page;
free(p);
return 0;
}
static int mem_fb_page_flip(til_fb_t *fb, void *context, void *page)
{
mem_fb_t *c = context;
mem_fb_page_t *p = page;
/* TODO: add a timer for supporting an fps setting? */
return 0;
}
til_fb_ops_t mem_fb_ops = {
.setup = mem_fb_setup,
.init = mem_fb_init,
.shutdown = mem_fb_shutdown,
.acquire = mem_fb_acquire,
.release = mem_fb_release,
.page_alloc = mem_fb_page_alloc,
.page_free = mem_fb_page_free,
.page_flip = mem_fb_page_flip
};
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