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#include "core/pch.hh"
#include "core/image.hh"
#include "core/resource.hh"
static emhash8::HashMap<std::string, resource_ptr<Image>> resource_map;
static int stbi_physfs_read(void *context, char *data, int size)
{
return PHYSFS_readBytes(reinterpret_cast<PHYSFS_File *>(context), data, size);
}
static void stbi_physfs_skip(void *context, int count)
{
auto file = reinterpret_cast<PHYSFS_File *>(context);
PHYSFS_seek(file, PHYSFS_tell(file) + count);
}
static int stbi_physfs_eof(void *context)
{
return PHYSFS_eof(reinterpret_cast<PHYSFS_File *>(context));
}
template<>
resource_ptr<Image> resource::load<Image>(const char *name, unsigned int flags)
{
auto it = resource_map.find(name);
if(it != resource_map.cend()) {
// Return an existing resource
return it->second;
}
auto file = PHYSFS_openRead(name);
if(file == nullptr) {
spdlog::warn("resource: {}: {}", name, PHYSFS_getErrorByCode(PHYSFS_getLastErrorCode()));
return nullptr;
}
if(flags & IMAGE_LOAD_FLIP)
stbi_set_flip_vertically_on_load(true);
else stbi_set_flip_vertically_on_load(false);
stbi_io_callbacks callbacks;
callbacks.read = &stbi_physfs_read;
callbacks.skip = &stbi_physfs_skip;
callbacks.eof = &stbi_physfs_eof;
auto new_resource = std::make_shared<Image>();
if(flags & IMAGE_LOAD_GRAY)
new_resource->pixels = stbi_load_from_callbacks(&callbacks, file, &new_resource->size.x, &new_resource->size.y, nullptr, STBI_grey);
else new_resource->pixels = stbi_load_from_callbacks(&callbacks, file, &new_resource->size.x, &new_resource->size.y, nullptr, STBI_rgb_alpha);
PHYSFS_close(file);
if(new_resource->pixels == nullptr) {
spdlog::warn("resource: {}: {}", name, stbi_failure_reason());
return nullptr;
}
if(new_resource->size.x <= 0 || new_resource->size.y <= 0) {
spdlog::warn("resource {}: invalid dimensions", name);
stbi_image_free(new_resource->pixels);
return nullptr;
}
return resource_map.insert_or_assign(name, new_resource).first->second;
}
template<>
void resource::hard_cleanup<Image>(void)
{
for(const auto &it : resource_map) {
if(it.second.use_count() > 1L)
spdlog::warn("resource: zombie resource [Image] {} [use_count={}]", it.first, it.second.use_count());
else spdlog::debug("resource: releasing [Image] {}", it.first);
stbi_image_free(it.second->pixels);
}
resource_map.clear();
}
template<>
void resource::soft_cleanup<Image>(void)
{
auto iter = resource_map.cbegin();
while(iter != resource_map.cend()) {
if(iter->second.use_count() == 1L) {
spdlog::debug("resource: releasing [Image] {}", iter->first);
stbi_image_free(iter->second->pixels);
iter = resource_map.erase(iter);
continue;
}
iter = std::next(iter);
}
}
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