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#include "asset_cache.h"
#include "model.h"
#include "scene/animation_impl.h"
#include "scene/model_impl.h"
#include "scene/node_impl.h"
#include "scene/scene_memory.h"
#include "texture.h"
#include <gfx/asset.h>
#include <gfx/gfx.h>
#include <gfx/scene/node.h>
#include <gfx_assert.h>
#include <cstring.h>
#include <log/log.h>
static Hash calc_model_hash(const LoadModelCmd* cmd) {
assert(cmd);
switch (cmd->origin) {
case AssetFromFile:
return cstring_hash(mstring_cstr(&cmd->filepath));
case AssetFromMemory:
return (Hash)cmd->data;
}
FAIL("Unhandled model asset origin");
return 0;
}
static Hash calc_texture_hash(const LoadTextureCmd* cmd) {
assert(cmd);
switch (cmd->origin) {
case AssetFromFile:
switch (cmd->type) {
case LoadTexture:
return cstring_hash(mstring_cstr(&cmd->data.texture.filepath));
case LoadCubemap:
return cstring_hash(
mstring_cstr(&cmd->data.cubemap.filepaths.filepath_pos_x)) ^
cstring_hash(
mstring_cstr(&cmd->data.cubemap.filepaths.filepath_neg_x)) ^
cstring_hash(
mstring_cstr(&cmd->data.cubemap.filepaths.filepath_pos_y)) ^
cstring_hash(
mstring_cstr(&cmd->data.cubemap.filepaths.filepath_neg_y)) ^
cstring_hash(
mstring_cstr(&cmd->data.cubemap.filepaths.filepath_pos_z)) ^
cstring_hash(
mstring_cstr(&cmd->data.cubemap.filepaths.filepath_neg_z));
}
break;
case AssetFromMemory:
switch (cmd->type) {
case LoadTexture:
return (Hash)cmd->data.texture.data;
case LoadCubemap:
return (Hash)cmd->data.cubemap.buffers.data_pos_x ^
(Hash)cmd->data.cubemap.buffers.data_neg_x ^
(Hash)cmd->data.cubemap.buffers.data_pos_y ^
(Hash)cmd->data.cubemap.buffers.data_neg_y ^
(Hash)cmd->data.cubemap.buffers.data_pos_z ^
(Hash)cmd->data.cubemap.buffers.data_neg_z;
}
break;
}
FAIL("Unhandled texture asset origin");
return 0;
}
static Asset* lookup_cache(AssetCache* cache, Hash hash) {
assert(cache);
mempool_foreach(&cache->assets, asset, {
if (asset->hash == hash) {
return asset;
}
});
return 0;
}
static void log_model_cache_hit(const LoadModelCmd* cmd, Hash hash) {
assert(cmd);
switch (cmd->origin) {
case AssetFromFile:
LOGD(
"Found asset [%s] in cache with hash [%lu]",
mstring_cstr(&cmd->filepath), hash);
break;
case AssetFromMemory:
LOGD("Found asset [%p] in cache with hash [%lu]", cmd->data, hash);
break;
}
}
static void log_model_loaded(const LoadModelCmd* cmd) {
assert(cmd);
switch (cmd->origin) {
case AssetFromFile:
LOGD("Loaded asset from file: [%s]", mstring_cstr(&cmd->filepath));
break;
case AssetFromMemory:
LOGD("Loaded asset from memory: [%p]", cmd->data);
break;
}
}
static Model* clone_model(const Model* model) {
assert(model);
// Only the Anima needs to be (shallow) cloned since everything else in the
// model is static. Also note that only the Anima's joints and animation state
// need to be cloned; all other members can be shared. So a shallow clone of
// the anima is sufficient.
const SceneNode* root = mem_get_node(model->root);
if (gfx_get_node_type(root) == AnimaNode) {
const Anima* anima = gfx_get_node_anima(root);
Anima* anima_copy = mem_alloc_anima();
*anima_copy = *anima; // Shallow copy.
SceneNode* root_copy = gfx_clone_scene_shallow(root);
root_copy->anima = mem_get_anima_index(anima_copy);
anima_copy->parent = mem_get_node_index(root_copy);
Model* copy = mem_alloc_model();
copy->root = mem_get_node_index(root_copy);
return copy;
} else {
return (Model*)model; // Static model, can't be mutated.
}
}
void gfx_init_asset_cache(AssetCache* cache) {
assert(cache);
mempool_make(&cache->assets);
// Allocate a dummy asset at index 0 to guarantee that no assets allocated by
// the caller map to index 0.
const Asset* dummy = mempool_alloc(&cache->assets);
assert(mempool_get_block_index(&cache->assets, dummy) == 0);
}
void gfx_destroy_asset_cache(AssetCache* cache) {
assert(cache);
mempool_del(&cache->assets);
}
Model* gfx_load_model(Gfx* gfx, const LoadModelCmd* cmd) {
assert(gfx);
AssetCache* cache = gfx_get_asset_cache(gfx);
// First search for the asset in the cache.
const uint64_t hash = calc_model_hash(cmd);
Asset* asset = lookup_cache(cache, hash);
if (asset) {
log_model_cache_hit(cmd, hash);
return clone_model(asset->model);
}
// Asset not found in the cache.
// Load it, insert it into the cache, and return it.
Model* model = gfx_model_load(gfx, cmd);
if (model) {
*(Asset*)mempool_alloc(&cache->assets) = (Asset){
.type = ModelAsset,
.hash = hash,
.model = model,
};
log_model_loaded(cmd);
}
return clone_model(model);
}
const Texture* gfx_load_texture(Gfx* gfx, const LoadTextureCmd* cmd) {
assert(gfx);
assert(cmd);
AssetCache* cache = gfx_get_asset_cache(gfx);
// First search for the asset in the cache.
const uint64_t hash = calc_texture_hash(cmd);
Asset* asset = lookup_cache(cache, hash);
if (asset) {
return asset->texture;
}
// Asset not found in the cache.
// Load it, insert it into the cache, and return it.
RenderBackend* render_backend = gfx_get_render_backend(gfx);
const Texture* texture = gfx_texture_load(render_backend, cmd);
if (texture) {
*(Asset*)mempool_alloc(&cache->assets) = (Asset){
.type = TextureAsset,
.hash = hash,
.texture = texture,
};
}
return texture;
}
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