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#include "asset.h"
#include "memory.h"
#include "plat.h"
#include "standard.h"
#include <stdlib.h>
static const Asset_Meta asset_meta[] = {
#define x(id, type, path) { type, path },
assets_xmacro()
#undef x
};
Asset* loaded_assets[asset_id_count];
static void init_mesh_asset(Asset* asset, void* raw, int size) {
Mesh* m = raw;
asset->payload = raw;
asset->payload_size = size;
m->p = (int*)&m[1];
m->n = (int*)&m->p[m->pc * 3];
m->t = (int*)&m->n[m->nc * 3];
m->verts = (Mesh_Vert*)&m->t[m->tc * 2];
}
static void init_texture_asset(Asset* asset, void* raw, int size) {
asset->payload = raw;
asset->payload_size = size;
}
/* Loading assets isn't that efficient. Too bad. */
static int get_asset_info(
File* pack,
int pack_count,
const char* name,
int* offset,
int* size
) {
int head_size = 8, i;
char buf[56];
file_seek(pack, head_size, file_whence_begin);
for (i = 0; i < pack_count; i++) {
file_read(pack, size, 4);
file_read(pack, offset, 4);
file_read(pack, buf, sizeof buf);
if (string_equal(buf, name)) {
return 1;
}
}
return 0;
}
Asset_Data* read_asset_data(
const char* name,
Arena* arena
) {
Asset_Data* r = 0;
File* pack;
int pack_count, offset, size;
pack = file_open("pack", file_flags_read);
if (!pack) {
print_err("Couldn't find 'pack'. Did you delete it?\n");
pbreak(error_file_not_found);
return 0;
}
file_read(pack, &pack_count, 4);
if (get_asset_info(pack, pack_count, name, &offset, &size)) {
r = arena_alloc(arena, sizeof *r);
r->offset = offset;
r->size = size;
r->buffer = arena_alloc(arena, r->size);
file_seek(pack, offset, file_whence_begin);
file_read(pack, r->buffer, r->size);
} else {
print_err(\
"%s doesn't exist in the pack. "
"Is the pack corrupt?\n",
name
);
file_close(pack);
return 0;
}
file_close(pack);
return r;
}
void preload_assets(Arena* mem) {
int offset, size, pack_count, id;
Asset* asset;
File* pack;
const Asset_Meta* meta;
const char* name;
Asset_Type type;
void* raw;
pack = file_open("pack", file_flags_read);
if (!pack) {
print_err("Couldn't find 'pack'. Did you delete it?\n");
pbreak(error_file_not_found);
}
file_read(pack, &pack_count, 4);
#define gi(e_) \
meta = get_asset_meta((Asset_ID)id); \
name = meta->name; \
type = meta->type; \
if (get_asset_info( \
pack, \
pack_count, \
name, \
&offset, \
&size \
)) { \
file_seek(pack, offset, file_whence_begin); \
e_ \
} else { \
print_err( \
"%s doesn't exist in the pack. " \
"Is the pack corrupt?\n", \
name \
); \
pbreak(error_file_not_found); \
}
for (id = 0; id < asset_id_count; id++) {
gi({
asset = arena_alloc(mem, sizeof *asset);
asset->id = (Asset_ID)id;
asset->type = type;
raw = arena_alloc(mem, size);
file_seek(pack, offset, file_whence_begin);
file_read(pack, raw, size);
switch (type) {
case asset_type_mesh:
init_mesh_asset(asset, raw, size);
break;
case asset_type_texture:
init_texture_asset(asset, raw, size);
break;
default:
print_err("Invalid asset type.\n");
pbreak(error_invalid_asset);
break;
}
loaded_assets[id] = asset;
});
}
#undef gi
file_close(pack);
}
const Asset* get_asset(Asset_ID id) {
return loaded_assets[id];
}
const Asset_Meta* get_asset_meta(Asset_ID id) {
return &asset_meta[id];
}
const struct Mesh* get_mesh(Asset_ID id) {
const Asset* a = get_asset(id);
return (struct Mesh*)a->payload;
}
const struct Texture* get_texture(Asset_ID id) {
const Asset* a = get_asset(id);
return (struct Texture*)a->payload;
}
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