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FilamentResourceManager.cpp
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// ----------------------------------------------------------------------------
// - Open3D: www.open3d.org -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.open3d.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
#include "open3d/visualization/rendering/filament/FilamentResourceManager.h"
#include "open3d/core/Dtype.h"
// 4068: Filament has some clang-specific vectorizing pragma's that MSVC flags
// 4146: PixelBufferDescriptor assert unsigned is positive before subtracting
// but MSVC can't figure that out.
// 4293: Filament's utils/algorithm.h utils::details::clz() does strange
// things with MSVC. Somehow sizeof(unsigned int) > 4, but its size is
// 32 so that x >> 32 gives a warning. (Or maybe the compiler can't
// determine the if statement does not run.)
// 4305: LightManager.h needs to specify some constants as floats
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable : 4068 4146 4293 4305)
#endif // _MSC_VER
#include <filament/Engine.h>
#include <filament/IndexBuffer.h>
#include <filament/IndirectLight.h>
#include <filament/LightManager.h>
#include <filament/Material.h>
#include <filament/RenderTarget.h>
#include <filament/RenderableManager.h>
#include <filament/Scene.h>
#include <filament/Skybox.h>
#include <filament/Texture.h>
#include <filament/TextureSampler.h>
#include <image/KtxBundle.h>
#include <image/KtxUtility.h>
#ifdef _MSC_VER
#pragma warning(pop)
#endif // _MSC_VER
#include "open3d/io/ImageIO.h"
#include "open3d/t/geometry/Image.h"
#include "open3d/utility/FileSystem.h"
#include "open3d/utility/Logging.h"
#include "open3d/visualization/gui/Application.h"
#include "open3d/visualization/rendering/filament/FilamentEngine.h"
#include "open3d/visualization/rendering/filament/FilamentEntitiesMods.h"
namespace open3d {
namespace visualization {
namespace rendering {
// Implementation of FNV-1a hash function. See
// https://en.wikipedia.org/wiki/Fowler-Noll-Vo_hash_function for details
std::uint64_t fnv1a_block_hash(const void* const block, std::size_t len) {
const uint64_t kFNVPrime = 0x00000100000001B3;
std::uint64_t hash = 0xcbf29ce484222325;
const auto* ptr = static_cast<const unsigned char*>(block);
for (unsigned int i = 0; i < len; ++i) {
hash ^= static_cast<uint64_t>(*ptr++);
hash *= kFNVPrime;
}
return hash;
}
namespace {
template <class ResourceType>
using ResourcesContainer =
FilamentResourceManager::ResourcesContainer<ResourceType>;
// We need custom shared pointer make function to
// use engine deleter for allocated filament entities
template <class ResourceType>
std::shared_ptr<ResourceType> MakeShared(ResourceType* pointer,
filament::Engine& engine) {
return std::shared_ptr<ResourceType>(
pointer, [&engine](ResourceType* p) { engine.destroy(p); });
}
template <class ResourceType>
FilamentResourceManager::BoxedResource<ResourceType> BoxResource(
ResourceType* pointer, filament::Engine& engine) {
return FilamentResourceManager::BoxedResource<ResourceType>(
MakeShared(pointer, engine));
}
template <class Handle, class ResourceType>
Handle RegisterResource(filament::Engine& engine,
ResourceType* resource,
ResourcesContainer<ResourceType>& container) {
if (!resource) {
utility::LogError("Trying to register empty resource!");
return Handle::kBad;
}
auto new_handle = Handle::Next();
container[new_handle] = std::move(BoxResource(resource, engine));
return new_handle;
}
template <class ResourceType>
std::weak_ptr<ResourceType> FindResource(
const REHandle_abstract& id,
ResourcesContainer<ResourceType>& container) {
auto found = container.find(id);
if (found != container.end()) {
return found->second.ptr;
}
utility::LogWarning("Resource {} not found.", id);
return std::weak_ptr<ResourceType>();
}
template <class ResourceType>
void DestroyResource(const REHandle_abstract& id,
ResourcesContainer<ResourceType>& container) {
auto found = container.find(id);
if (found == container.end()) {
utility::LogError("Trying to destroy nonexistent resource ({})!", id);
return;
}
found->second.use_count -= 1;
if (found->second.use_count == 0) {
container.erase(found);
} else if (found->second.use_count < 0) {
utility::LogError("Negative use count for resource ({})!", id);
return;
}
}
// Image data that is retained by renderer thread,
// will be freed on PixelBufferDescriptor callback
std::unordered_map<std::intptr_t, std::shared_ptr<geometry::Image>>
pending_images;
std::intptr_t RetainImageForLoading(
const std::shared_ptr<geometry::Image>& img) {
static std::intptr_t img_id = 1;
const auto id = img_id;
pending_images[img_id] = img;
++img_id;
return id;
}
static void DeallocateBuffer(void* buffer, size_t size, void* user_ptr) {
free(buffer);
}
void FreeRetainedImage(void* buffer, size_t size, void* user_ptr) {
const auto id = reinterpret_cast<std::intptr_t>(user_ptr);
auto found = pending_images.find(id);
if (found != pending_images.end()) {
pending_images.erase(found);
} else {
utility::LogDebug(
"Trying to release non existent image shared pointer, id: {}",
id);
}
}
filament::Material* LoadMaterialFromFile(const std::string& path,
filament::Engine& engine) {
std::vector<char> material_data;
std::string error_str;
std::string platform_path = path;
#ifdef _WIN32
std::replace(platform_path.begin(), platform_path.end(), '/', '\\');
#endif // _WIN32
utility::LogDebug("LoadMaterialFromFile(): {}", platform_path);
if (utility::filesystem::FReadToBuffer(platform_path, material_data,
&error_str)) {
using namespace filament;
return Material::Builder()
.package(material_data.data(), material_data.size())
.build(engine);
}
utility::LogDebug("Failed to load default material from {}. Error: {}",
platform_path, error_str);
return nullptr;
}
struct TextureSettings {
filament::Texture::Format image_format = filament::Texture::Format::RGB;
filament::Texture::Type image_type = filament::Texture::Type::UBYTE;
filament::Texture::InternalFormat format =
filament::Texture::InternalFormat::RGB8;
std::uint32_t texel_width = 0;
std::uint32_t texel_height = 0;
};
void FormatSettingsFromImage(TextureSettings& settings,
int num_channels,
int bytes_per_channel,
bool srgb) {
// Map of (bytes_per_channel << 4 | num_channles) -> internal format
static std::unordered_map<unsigned int, filament::Texture::InternalFormat>
format_map = {
{(4 << 4 | 1), filament::Texture::InternalFormat::R32F},
{(4 << 4 | 2), filament::Texture::InternalFormat::RG32F},
{(4 << 4 | 3), filament::Texture::InternalFormat::RGB32F},
{(4 << 4 | 4), filament::Texture::InternalFormat::RGBA32F},
{(2 << 4 | 1), filament::Texture::InternalFormat::R16UI},
{(2 << 4 | 2), filament::Texture::InternalFormat::RG16UI},
{(2 << 4 | 3), filament::Texture::InternalFormat::RGB16UI},
{(2 << 4 | 4), filament::Texture::InternalFormat::RGBA16UI},
{(1 << 4 | 1), filament::Texture::InternalFormat::R8},
{(1 << 4 | 2), filament::Texture::InternalFormat::RG8},
{(1 << 4 | 3), filament::Texture::InternalFormat::RGB8},
{(1 << 4 | 4), filament::Texture::InternalFormat::RGBA8}};
// Set image format
bool int_format = (bytes_per_channel == 2);
switch (num_channels) {
case 1:
settings.image_format =
(int_format ? filament::Texture::Format::R_INTEGER
: filament::Texture::Format::R);
break;
case 2:
settings.image_format =
(int_format ? filament::Texture::Format::RG_INTEGER
: filament::Texture::Format::RG);
break;
case 3:
settings.image_format =
(int_format ? filament::Texture::Format::RGB_INTEGER
: filament::Texture::Format::RGB);
break;
case 4:
settings.image_format =
(int_format ? filament::Texture::Format::RGBA_INTEGER
: filament::Texture::Format::RGBA);
break;
default:
utility::LogError("Unsupported image number of channels: {}",
num_channels);
break;
}
// Figure out internal format
unsigned int key = (bytes_per_channel << 4 | num_channels);
if (format_map.count(key) > 0) {
settings.format = format_map[key];
} else {
utility::LogError(
"Unsupported combination of number of channels ({}) and bytes "
"per channel ({}).",
num_channels, bytes_per_channel);
}
// Override the two special cases of RGB/RGBA with srgb=true
if (srgb && bytes_per_channel == 1 &&
(num_channels == 3 || num_channels == 4)) {
if (num_channels == 3) {
settings.format = filament::Texture::InternalFormat::SRGB8;
} else {
settings.format = filament::Texture::InternalFormat::SRGB8_A8;
}
}
}
void DataTypeFromImage(TextureSettings& settings, int bytes_per_channel) {
switch (bytes_per_channel) {
case 1:
settings.image_type = filament::Texture::Type::UBYTE;
break;
case 2:
settings.image_type = filament::Texture::Type::USHORT;
break;
case 4:
settings.image_type = filament::Texture::Type::FLOAT;
break;
default:
utility::LogError("Unsupported image bytes per channel: {}",
bytes_per_channel);
break;
}
}
TextureSettings GetSettingsFromImage(const geometry::Image& image, bool srgb) {
TextureSettings settings;
settings.texel_width = image.width_;
settings.texel_height = image.height_;
FormatSettingsFromImage(settings, image.num_of_channels_,
image.bytes_per_channel_, srgb);
DataTypeFromImage(settings, image.bytes_per_channel_);
return settings;
}
TextureSettings GetSettingsFromImage(const t::geometry::Image& image,
bool srgb) {
TextureSettings settings;
settings.texel_width = image.GetCols();
settings.texel_height = image.GetRows();
FormatSettingsFromImage(settings, image.GetChannels(),
image.GetDtype().ByteSize(), srgb);
DataTypeFromImage(settings, image.GetDtype().ByteSize());
return settings;
}
} // namespace
const MaterialHandle FilamentResourceManager::kDefaultLit =
MaterialHandle::Next();
const MaterialHandle FilamentResourceManager::kGaussianSplatShader =
MaterialHandle::Next();
const MaterialHandle FilamentResourceManager::kDefaultLitWithTransparency =
MaterialHandle::Next();
const MaterialHandle FilamentResourceManager::kDefaultLitSSR =
MaterialHandle::Next();
const MaterialHandle FilamentResourceManager::kDefaultUnlit =
MaterialHandle::Next();
const MaterialHandle FilamentResourceManager::kDefaultUnlitWithTransparency =
MaterialHandle::Next();
const MaterialHandle FilamentResourceManager::kDefaultNormalShader =
MaterialHandle::Next();
const MaterialHandle FilamentResourceManager::kDefaultDepthShader =
MaterialHandle::Next();
const MaterialHandle FilamentResourceManager::kDefaultDepthValueShader =
MaterialHandle::Next();
const MaterialHandle FilamentResourceManager::kDefaultUnlitGradientShader =
MaterialHandle::Next();
const MaterialHandle FilamentResourceManager::kDefaultUnlitSolidColorShader =
MaterialHandle::Next();
const MaterialHandle FilamentResourceManager::kDefaultUnlitBackgroundShader =
MaterialHandle::Next();
const MaterialHandle FilamentResourceManager::kInfinitePlaneShader =
MaterialHandle::Next();
const MaterialHandle FilamentResourceManager::kDefaultLineShader =
MaterialHandle::Next();
const MaterialHandle FilamentResourceManager::kDefaultUnlitPolygonOffsetShader =
MaterialHandle::Next();
const MaterialInstanceHandle FilamentResourceManager::kDepthMaterial =
MaterialInstanceHandle::Next();
const MaterialInstanceHandle FilamentResourceManager::kNormalsMaterial =
MaterialInstanceHandle::Next();
const MaterialInstanceHandle FilamentResourceManager::kColorMapMaterial =
MaterialInstanceHandle::Next();
const TextureHandle FilamentResourceManager::kDefaultTexture =
TextureHandle::Next();
const TextureHandle FilamentResourceManager::kDefaultColorMap =
TextureHandle::Next();
const TextureHandle FilamentResourceManager::kDefaultNormalMap =
TextureHandle::Next();
static const std::unordered_set<REHandle_abstract> kDefaultResources = {
FilamentResourceManager::kDefaultLit,
FilamentResourceManager::kDefaultLitWithTransparency,
FilamentResourceManager::kDefaultUnlit,
FilamentResourceManager::kDefaultNormalShader,
FilamentResourceManager::kDefaultDepthShader,
FilamentResourceManager::kDefaultUnlitGradientShader,
FilamentResourceManager::kDefaultUnlitSolidColorShader,
FilamentResourceManager::kDefaultUnlitBackgroundShader,
FilamentResourceManager::kInfinitePlaneShader,
FilamentResourceManager::kDefaultLineShader,
FilamentResourceManager::kDefaultUnlitPolygonOffsetShader,
FilamentResourceManager::kDepthMaterial,
FilamentResourceManager::kNormalsMaterial,
FilamentResourceManager::kDefaultTexture,
FilamentResourceManager::kDefaultColorMap,
FilamentResourceManager::kDefaultNormalMap};
FilamentResourceManager::FilamentResourceManager(filament::Engine& engine)
: engine_(engine) {
LoadDefaults();
}
FilamentResourceManager::~FilamentResourceManager() { DestroyAll(); }
MaterialHandle FilamentResourceManager::CreateMaterial(
const void* material_data, const size_t data_size) {
using namespace filament;
Material* material = Material::Builder()
.package(material_data, data_size)
.build(engine_);
MaterialHandle handle;
if (material) {
handle =
RegisterResource<MaterialHandle>(engine_, material, materials_);
}
return handle;
}
MaterialHandle FilamentResourceManager::CreateMaterial(
const ResourceLoadRequest& request) {
MaterialHandle handle;
if (!request.path_.empty()) {
std::vector<char> material_data;
std::string error_str;
if (utility::filesystem::FReadToBuffer(request.path_, material_data,
&error_str)) {
handle = CreateMaterial(material_data.data(), material_data.size());
} else {
request.error_callback_(request, errno, error_str);
}
} else if (request.data_size_ > 0) {
// TODO: Filament throws an exception if it can't parse the
// material. Handle this exception across library boundary
// to avoid aborting.
handle = CreateMaterial(request.data_, request.data_size_);
} else {
request.error_callback_(request, -1, "");
}
return handle;
}
MaterialInstanceHandle FilamentResourceManager::CreateMaterialInstance(
const MaterialHandle& id) {
auto found = materials_.find(id);
if (found != materials_.end()) {
auto material_instance = found->second->createInstance();
return RegisterResource<MaterialInstanceHandle>(
engine_, material_instance, material_instances_);
}
utility::LogWarning("Material ({}) for creating instance not found", id);
return {};
}
TextureHandle FilamentResourceManager::CreateTexture(const char* path,
bool srgb) {
std::shared_ptr<geometry::Image> img;
if (path) {
img = io::CreateImageFromFile(path);
} else {
utility::LogWarning("Empty path for texture loading provided");
}
return CreateTexture(img, srgb);
}
TextureHandle FilamentResourceManager::CreateTexture(
const std::shared_ptr<geometry::Image>& img, bool srgb) {
TextureHandle handle;
auto hash = fnv1a_block_hash(img->data_.data(), img->data_.size());
if (texture_cache_.count(hash) > 0) {
handle = texture_cache_[hash];
textures_[handle].use_count++;
return handle;
} else if (img->HasData()) {
auto texture = LoadTextureFromImage(img, srgb);
handle = RegisterResource<TextureHandle>(engine_, texture, textures_);
textures_[handle].use_count++;
texture_cache_[hash] = handle;
}
return handle;
}
TextureHandle FilamentResourceManager::CreateTexture(
const geometry::Image& image, bool srgb) {
TextureHandle handle;
auto hash = fnv1a_block_hash(image.data_.data(), image.data_.size());
if (texture_cache_.count(hash) > 0) {
handle = texture_cache_[hash];
textures_[handle].use_count++;
return handle;
} else if (image.HasData()) {
auto copy = std::make_shared<geometry::Image>(image);
auto texture = LoadTextureFromImage(copy, srgb);
handle = RegisterResource<TextureHandle>(engine_, texture, textures_);
textures_[handle].use_count++;
texture_cache_[hash] = handle;
}
return handle;
}
TextureHandle FilamentResourceManager::CreateTexture(
const t::geometry::Image& image, bool srgb) {
TextureHandle handle;
auto texture = LoadTextureFromImage(image, srgb);
handle = RegisterResource<TextureHandle>(engine_, texture, textures_);
return handle;
}
TextureHandle FilamentResourceManager::CreateTextureFilled(
const Eigen::Vector3f& color, size_t dimension) {
TextureHandle handle;
auto texture = LoadFilledTexture(color, dimension);
handle = RegisterResource<TextureHandle>(engine_, texture, textures_);
return handle;
}
bool FilamentResourceManager::UpdateTexture(
TextureHandle texture,
const std::shared_ptr<geometry::Image> image,
bool srgb) {
auto ftexture_weak = GetTexture(texture);
if (auto ftexture = ftexture_weak.lock()) {
if (ftexture->getWidth() == size_t(image->width_) &&
ftexture->getHeight() == size_t(image->height_)) {
auto retained_img_id = RetainImageForLoading(image);
auto texture_settings = GetSettingsFromImage(*image, srgb);
filament::Texture::PixelBufferDescriptor desc(
image->data_.data(), image->data_.size(),
texture_settings.image_format, texture_settings.image_type,
FreeRetainedImage, (void*)retained_img_id);
ftexture->setImage(engine_, 0, std::move(desc));
return true;
}
}
return false;
}
bool FilamentResourceManager::UpdateTexture(TextureHandle texture,
const t::geometry::Image& image,
bool srgb) {
auto ftexture_weak = GetTexture(texture);
if (auto ftexture = ftexture_weak.lock()) {
if (ftexture->getWidth() == size_t(image.GetCols()) &&
ftexture->getHeight() == size_t(image.GetRows())) {
auto texture_settings = GetSettingsFromImage(image, srgb);
filament::Texture::PixelBufferDescriptor desc(
image.GetDataPtr(),
image.GetRows() * image.GetCols() * image.GetChannels() *
image.GetDtype().ByteSize(),
texture_settings.image_format, texture_settings.image_type);
ftexture->setImage(engine_, 0, std::move(desc));
return true;
}
}
return false;
}
TextureHandle FilamentResourceManager::CreateColorAttachmentTexture(
int width, int height) {
using namespace filament;
auto texture = Texture::Builder()
.width(width)
.height(height)
.levels(1)
.format(Texture::InternalFormat::RGBA16F)
.usage(Texture::Usage::COLOR_ATTACHMENT |
Texture::Usage::SAMPLEABLE)
.build(engine_);
TextureHandle handle;
handle = RegisterResource<TextureHandle>(engine_, texture, textures_);
return handle;
}
TextureHandle FilamentResourceManager::CreateDepthAttachmentTexture(
int width, int height) {
using namespace filament;
auto texture = Texture::Builder()
.width(width)
.height(height)
.levels(1)
.format(Texture::InternalFormat::DEPTH32F)
.usage(Texture::Usage::DEPTH_ATTACHMENT)
.build(engine_);
TextureHandle handle;
handle = RegisterResource<TextureHandle>(engine_, texture, textures_);
return handle;
}
RenderTargetHandle FilamentResourceManager::CreateRenderTarget(
TextureHandle color, TextureHandle depth) {
using namespace filament;
RenderTargetHandle handle;
auto color_tex_weak = GetTexture(color);
auto depth_tex_weak = GetTexture(depth);
auto color_tex = color_tex_weak.lock();
auto depth_tex = depth_tex_weak.lock();
if (!color_tex || !depth_tex) {
utility::LogWarning("Supplied texture attachments are invalid.");
return handle;
}
auto rt = RenderTarget::Builder()
.texture(RenderTarget::COLOR, color_tex.get())
.texture(RenderTarget::DEPTH, depth_tex.get())
.build(engine_);
handle = RegisterResource<RenderTargetHandle>(engine_, rt, render_targets_);
return handle;
}
IndirectLightHandle FilamentResourceManager::CreateIndirectLight(
const ResourceLoadRequest& request) {
IndirectLightHandle handle;
if (!request.path_.empty()) {
std::vector<char> ibl_data;
std::string error_str;
if (utility::filesystem::FReadToBuffer(request.path_, ibl_data,
&error_str)) {
using namespace filament;
// will be destroyed later by image::ktx::createTexture
auto* ibl_ktx = new image::KtxBundle(
reinterpret_cast<std::uint8_t*>(ibl_data.data()),
std::uint32_t(ibl_data.size()));
auto* ibl_texture =
image::ktx::createTexture(&engine_, ibl_ktx, false);
filament::math::float3 bands[9] = {};
if (!ibl_ktx->getSphericalHarmonics(bands)) {
engine_.destroy(ibl_texture);
request.error_callback_(
request, 2,
"Failed to read spherical harmonics from ktx");
return handle;
}
auto indirect_light = IndirectLight::Builder()
.reflections(ibl_texture)
.irradiance(3, bands)
.intensity(30000.f)
.build(engine_);
if (indirect_light) {
handle = RegisterResource<IndirectLightHandle>(
engine_, indirect_light, ibls_);
auto htexture = RegisterResource<TextureHandle>(
engine_, ibl_texture, textures_);
dependencies_[handle].insert(htexture);
} else {
request.error_callback_(
request, 3, "Failed to create indirect light from ktx");
engine_.destroy(ibl_texture);
}
} else {
request.error_callback_(request, errno, error_str);
}
} else {
request.error_callback_(request, -1, "");
}
return handle;
}
SkyboxHandle FilamentResourceManager::CreateColorSkybox(
const Eigen::Vector3f& color) {
filament::math::float4 fcolor;
fcolor.r = color.x();
fcolor.g = color.y();
fcolor.b = color.z();
fcolor.a = 1.0f;
auto skybox =
filament::Skybox::Builder().showSun(false).color(fcolor).build(
engine_);
auto handle = RegisterResource<SkyboxHandle>(engine_, skybox, skyboxes_);
return handle;
}
SkyboxHandle FilamentResourceManager::CreateSkybox(
const ResourceLoadRequest& request) {
SkyboxHandle handle;
if (!request.path_.empty()) {
std::vector<char> sky_data;
std::string error_str;
if (utility::filesystem::FReadToBuffer(request.path_, sky_data,
&error_str)) {
using namespace filament;
// will be destroyed later by image::ktx::createTexture
auto* sky_ktx = new image::KtxBundle(
reinterpret_cast<std::uint8_t*>(sky_data.data()),
std::uint32_t(sky_data.size()));
auto* sky_texture =
image::ktx::createTexture(&engine_, sky_ktx, false);
auto skybox = Skybox::Builder()
.environment(sky_texture)
.showSun(true)
.build(engine_);
if (skybox) {
handle = RegisterResource<SkyboxHandle>(engine_, skybox,
skyboxes_);
auto htex = RegisterResource<TextureHandle>(
engine_, sky_texture, textures_);
dependencies_[handle].insert(htex);
} else {
request.error_callback_(
request, 3, "Failed to create indirect light from ktx");
engine_.destroy(sky_texture);
}
} else {
request.error_callback_(request, errno, error_str);
}
} else {
request.error_callback_(request, -1, "");
}
return handle;
}
VertexBufferHandle FilamentResourceManager::AddVertexBuffer(
filament::VertexBuffer* vertex_buffer) {
return RegisterResource<VertexBufferHandle>(engine_, vertex_buffer,
vertex_buffers_);
}
void FilamentResourceManager::ReuseVertexBuffer(VertexBufferHandle vb) {
auto found = vertex_buffers_.find(vb);
if (found != vertex_buffers_.end()) {
found->second.use_count += 1;
} else {
utility::LogError("Reusing non-existent vertex buffer");
}
}
IndexBufferHandle FilamentResourceManager::CreateIndexBuffer(
size_t indices_count, size_t index_stride) {
using namespace filament;
IndexBuffer* ibuf =
IndexBuffer::Builder()
.bufferType(index_stride == 2
? IndexBuffer::IndexType::USHORT
: IndexBuffer::IndexType::UINT)
.indexCount(std::uint32_t(indices_count))
.build(engine_);
IndexBufferHandle handle;
if (ibuf) {
handle = RegisterResource<IndexBufferHandle>(engine_, ibuf,
index_buffers_);
}
return handle;
}
std::weak_ptr<filament::Material> FilamentResourceManager::GetMaterial(
const MaterialHandle& id) {
return FindResource(id, materials_);
}
std::weak_ptr<filament::MaterialInstance>
FilamentResourceManager::GetMaterialInstance(const MaterialInstanceHandle& id) {
return FindResource(id, material_instances_);
}
std::weak_ptr<filament::Texture> FilamentResourceManager::GetTexture(
const TextureHandle& id) {
return FindResource(id, textures_);
}
std::weak_ptr<filament::RenderTarget> FilamentResourceManager::GetRenderTarget(
const RenderTargetHandle& id) {
return FindResource(id, render_targets_);
}
std::weak_ptr<filament::IndirectLight>
FilamentResourceManager::GetIndirectLight(const IndirectLightHandle& id) {
return FindResource(id, ibls_);
}
std::weak_ptr<filament::Skybox> FilamentResourceManager::GetSkybox(
const SkyboxHandle& id) {
return FindResource(id, skyboxes_);
}
std::weak_ptr<filament::VertexBuffer> FilamentResourceManager::GetVertexBuffer(
const VertexBufferHandle& id) {
return FindResource(id, vertex_buffers_);
}
std::weak_ptr<filament::IndexBuffer> FilamentResourceManager::GetIndexBuffer(
const IndexBufferHandle& id) {
return FindResource(id, index_buffers_);
}
void FilamentResourceManager::DestroyAll() {
texture_cache_.clear();
material_instances_.clear();
materials_.clear();
textures_.clear();
render_targets_.clear();
vertex_buffers_.clear();
index_buffers_.clear();
ibls_.clear();
skyboxes_.clear();
}
void FilamentResourceManager::Destroy(const REHandle_abstract& id) {
if (kDefaultResources.count(id) > 0) {
utility::LogDebug(
"Trying to destroy default resource {}. Nothing will happen.",
id);
return;
}
switch (id.type) {
case EntityType::Material:
DestroyResource(id, materials_);
break;
case EntityType::MaterialInstance:
DestroyResource(id, material_instances_);
break;
case EntityType::Texture:
DestroyResource(id, textures_);
break;
case EntityType::VertexBuffer:
DestroyResource(id, vertex_buffers_);
break;
case EntityType::IndexBuffer:
DestroyResource(id, index_buffers_);
break;
case EntityType::Skybox:
DestroyResource(id, skyboxes_);
break;
case EntityType::IndirectLight:
DestroyResource(id, ibls_);
break;
case EntityType::RenderTarget:
DestroyResource(id, render_targets_);
break;
default:
utility::LogWarning(
"Resource {} is not suited for destruction by "
"ResourceManager",
REHandle_abstract::TypeToString(id.type));
return;
}
auto found = dependencies_.find(id);
if (found != dependencies_.end()) {
for (const auto& dependent : found->second) {
Destroy(dependent);
}
dependencies_.erase(found);
}
}
inline uint8_t maxLevelCount(uint32_t width, uint32_t height) {
auto maxdim = std::max(width, height);
uint8_t levels = static_cast<uint8_t>(std::ilogbf(float(maxdim)));
return std::max(1, levels + 1);
}
filament::Texture* FilamentResourceManager::LoadTextureFromImage(
const std::shared_ptr<geometry::Image>& image, bool srgb) {
using namespace filament;
auto retained_img_id = RetainImageForLoading(image);
auto texture_settings = GetSettingsFromImage(*image, srgb);
auto levels = maxLevelCount(texture_settings.texel_width,
texture_settings.texel_height);
bool mipmappable =
(texture_settings.image_type == filament::Texture::Type::UBYTE);
if (!mipmappable) {
levels = 1;
}
Texture::PixelBufferDescriptor pb(
image->data_.data(), image->data_.size(),
texture_settings.image_format, texture_settings.image_type,
FreeRetainedImage, (void*)retained_img_id);
auto texture = Texture::Builder()
.width(texture_settings.texel_width)
.height(texture_settings.texel_height)
.levels(levels)
.format(texture_settings.format)
.sampler(Texture::Sampler::SAMPLER_2D)
.build(engine_);
texture->setImage(engine_, 0, std::move(pb));
if (mipmappable) {
texture->generateMipmaps(engine_);
}
return texture;
}
filament::Texture* FilamentResourceManager::LoadTextureFromImage(
const t::geometry::Image& image, bool srgb) {
using namespace filament;
auto texture_settings = GetSettingsFromImage(image, srgb);
auto levels = maxLevelCount(texture_settings.texel_width,
texture_settings.texel_height);
// Float textures cannot be mipmapped
bool mipmappable = (image.GetDtype() == core::Dtype::UInt8);
if (mipmappable) {
levels = 1;
}
const size_t image_bytes = image.GetRows() * image.GetCols() *
image.GetChannels() *
image.GetDtype().ByteSize();
if (image.IsCUDA()) {
t::geometry::Image cpu_image = image.To(core::Device("CPU:0"));
auto* image_data = malloc(image_bytes);
memcpy(image_data, cpu_image.GetDataPtr(), image_bytes);
Texture::PixelBufferDescriptor pb(
image_data, image_bytes, texture_settings.image_format,
texture_settings.image_type, DeallocateBuffer);
auto texture = Texture::Builder()
.width(texture_settings.texel_width)
.height(texture_settings.texel_height)
.levels(levels)
.format(texture_settings.format)
.sampler(Texture::Sampler::SAMPLER_2D)
.build(engine_);
texture->setImage(engine_, 0, std::move(pb));
if (mipmappable) {
texture->generateMipmaps(engine_);
}
return texture;
} else {
Texture::PixelBufferDescriptor pb(image.GetDataPtr(), image_bytes,
texture_settings.image_format,
texture_settings.image_type);
auto texture = Texture::Builder()
.width(texture_settings.texel_width)
.height(texture_settings.texel_height)
.levels(levels)
.format(texture_settings.format)
.sampler(Texture::Sampler::SAMPLER_2D)
.build(engine_);
texture->setImage(engine_, 0, std::move(pb));
if (mipmappable) {
texture->generateMipmaps(engine_);
}
return texture;
}
}
filament::Texture* FilamentResourceManager::LoadFilledTexture(
const Eigen::Vector3f& color, size_t dimension) {
auto image = std::make_shared<geometry::Image>();
image->Prepare(int(dimension), int(dimension), 3, 1);
struct RGB {
std::uint8_t r, g, b;
};
RGB c = {static_cast<uint8_t>(color(0) * 255.f),
static_cast<uint8_t>(color(1) * 255.f),
static_cast<uint8_t>(color(2) * 255.f)};
auto data = reinterpret_cast<RGB*>(image->data_.data());
for (size_t i = 0; i < dimension * dimension; ++i) {
data[i] = c;
}
auto texture = LoadTextureFromImage(image, false);
return texture;
}
void FilamentResourceManager::LoadDefaults() {
// FIXME: Move to precompiled resource blobs
const std::string& resource_root = EngineInstance::GetResourcePath();
const auto texture_path = resource_root + "/defaultTexture.png";
auto texture_img = io::CreateImageFromFile(texture_path);
auto texture = LoadTextureFromImage(texture_img, false);
textures_[kDefaultTexture] = BoxResource(texture, engine_);
const auto colormap_path = resource_root + "/defaultGradient.png";
auto colormap_img = io::CreateImageFromFile(colormap_path);
auto color_map = LoadTextureFromImage(colormap_img, false);
textures_[kDefaultColorMap] = BoxResource(color_map, engine_);
auto normal_map = LoadFilledTexture(Eigen::Vector3f(0.5, 0.5, 1.f), 1);
textures_[kDefaultNormalMap] = BoxResource(normal_map, engine_);
const auto default_sampler =
FilamentMaterialModifier::SamplerFromSamplerParameters(
TextureSamplerParameters::Pretty());
const auto default_color = filament::math::float3{1.0f, 1.0f, 1.0f};
const auto default_color_alpha =
filament::math::float4{1.0f, 1.0f, 1.0f, 1.0f};
const auto lit_path = resource_root + "/defaultLit.filamat";
auto lit_mat = LoadMaterialFromFile(lit_path, engine_);