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gfx_scene.cpp
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/****************************************************************************
MIT License
Copyright (c) 2024 Guillaume Boissé
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
****************************************************************************/
#include "gfx_scene.h"
#include <map>
#include <set>
#include <functional>
#include <ios>
#include <fstream>
#define CGLTF_IMPLEMENTATION
#ifdef _MSC_VER
# pragma warning(push)
# pragma warning(disable:4789) // buffer will be overrun
#endif
#include <cgltf.h> // glTF loader
#ifdef _MSC_VER
# pragma warning(pop)
#endif
#include <tiny_obj_loader.h> // obj loader
#define STB_IMAGE_IMPLEMENTATION
#include <stb_image.h>
#include <tinyexr.h>
#define STB_IMAGE_WRITE_IMPLEMENTATION
#ifdef __clang__
# pragma clang diagnostic push
# pragma clang diagnostic ignored "-Wmissing-field-initializers"
#elif defined(__GNUC__)
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wmissing-field-initializers"
#endif
#include <stb_image_write.h>
#ifdef __clang__
# pragma clang diagnostic pop
#elif defined(__GNUC__)
# pragma GCC diagnostic pop
#endif
#ifdef GFX_ENABLE_SCENE_KTX
#include <ktx.h>
#include <vulkan/vulkan.h>
#endif
#define GLM_ENABLE_EXPERIMENTAL
#include <glm/gtx/quaternion.hpp>
#include <glm/gtc/type_ptr.hpp>
class GfxSceneInternal
{
GFX_NON_COPYABLE(GfxSceneInternal);
struct GltfNode
{
glm::dmat4 default_local_transform_;
glm::dmat4 world_transform_;
uint64_t parent_ = 0;
GfxRef<GfxSkin> skin_;
GfxRef<GfxLight> light_;
GfxRef<GfxCamera> camera_;
std::vector<uint64_t> children_;
std::vector<GfxRef<GfxInstance>> instances_;
std::vector<float> default_weights_;
};
struct GltfAnimatedNode
{
glm::dvec3 translate_;
glm::dquat rotate_;
glm::dvec3 scale_;
};
enum GltfAnimationChannelMode
{
kGltfAnimationChannelMode_Linear = 0,
kGltfAnimationChannelMode_Step,
kGltfAnimationChannelMode_Count
};
enum GltfAnimationChannelType
{
kGltfAnimationChannelType_Translate = 0,
kGltfAnimationChannelType_Rotate,
kGltfAnimationChannelType_Scale,
kGltfAnimationChannelType_Weights,
kGltfAnimationChannelType_Count
};
struct GltfAnimationChannel
{
uint64_t node_;
std::vector<float> keyframes_;
std::vector<float> values_;
GltfAnimationChannelMode mode_;
GltfAnimationChannelType type_;
};
struct GltfAnimation
{
std::vector<uint64_t> animated_root_nodes_;
std::vector<GfxRef<GfxSkin>> dependent_skins_;
std::vector<GltfAnimationChannel> channels_;
};
struct GltfSkin
{
std::vector<glm::mat4> inverse_bind_matrices_;
std::vector<uint64_t> joints_;
};
std::vector<uint64_t> scene_gltf_nodes_;
GfxArray<GltfNode> gltf_nodes_;
GfxArray<GltfAnimatedNode> gltf_animated_nodes_;
GfxHandles gltf_node_handles_;
GfxArray<GltfAnimation> gltf_animations_;
GfxArray<GltfSkin> gltf_skins_;
GfxArray<GfxAnimation> animations_;
GfxArray<uint64_t> animation_refs_;
GfxArray<GfxMetadata> animation_metadata_;
GfxHandles animation_handles_;
GfxArray<GfxSkin> skins_;
GfxArray<uint64_t> skin_refs_;
GfxArray<GfxMetadata> skin_metadata_;
GfxHandles skin_handles_;
GfxArray<GfxCamera> cameras_;
GfxArray<uint64_t> camera_refs_;
GfxArray<GfxMetadata> camera_metadata_;
GfxRef<GfxCamera> active_camera_;
GfxHandles camera_handles_;
GfxArray<GfxLight> lights_;
GfxArray<uint64_t> light_refs_;
GfxArray<GfxMetadata> light_metadata_;
GfxHandles light_handles_;
GfxArray<GfxImage> images_;
GfxArray<uint64_t> image_refs_;
GfxArray<GfxMetadata> image_metadata_;
GfxHandles image_handles_;
GfxArray<GfxMaterial> materials_;
GfxArray<uint64_t> material_refs_;
GfxArray<GfxMetadata> material_metadata_;
GfxHandles material_handles_;
GfxArray<GfxMesh> meshes_;
GfxArray<uint64_t> mesh_refs_;
GfxArray<GfxMetadata> mesh_metadata_;
GfxHandles mesh_handles_;
GfxArray<GfxInstance> instances_;
GfxArray<uint64_t> instance_refs_;
GfxArray<GfxMetadata> instance_metadata_;
GfxHandles instance_handles_;
static GfxArray<GfxScene> scenes_;
static GfxHandles scene_handles_;
template<typename TYPE> GfxArray<TYPE> &objects_();
template<typename TYPE> GfxArray<uint64_t> &object_refs_();
template<typename TYPE> GfxArray<GfxMetadata> &object_metadata_();
template<typename TYPE> GfxHandles &object_handles_();
template<> inline GfxArray<GfxAnimation> &objects_<GfxAnimation>() { return animations_; }
template<> inline GfxArray<uint64_t> &object_refs_<GfxAnimation>() { return animation_refs_; }
template<> inline GfxArray<GfxMetadata> &object_metadata_<GfxAnimation>() { return animation_metadata_; }
template<> inline GfxHandles &object_handles_<GfxAnimation>() { return animation_handles_; }
template<> inline GfxArray<GfxSkin> &objects_<GfxSkin>() { return skins_; }
template<> inline GfxArray<uint64_t> &object_refs_<GfxSkin>() { return skin_refs_; }
template<> inline GfxArray<GfxMetadata> &object_metadata_<GfxSkin>() { return skin_metadata_; }
template<> inline GfxHandles &object_handles_<GfxSkin>() { return skin_handles_; }
template<> inline GfxArray<GfxCamera> &objects_<GfxCamera>() { return cameras_; }
template<> inline GfxArray<uint64_t> &object_refs_<GfxCamera>() { return camera_refs_; }
template<> inline GfxArray<GfxMetadata> &object_metadata_<GfxCamera>() { return camera_metadata_; }
template<> inline GfxHandles &object_handles_<GfxCamera>() { return camera_handles_; }
template<> inline GfxArray<GfxLight>& objects_<GfxLight>() { return lights_; }
template<> inline GfxArray<uint64_t>& object_refs_<GfxLight>() { return light_refs_; }
template<> inline GfxArray<GfxMetadata>& object_metadata_<GfxLight>() { return light_metadata_; }
template<> inline GfxHandles& object_handles_<GfxLight>() { return light_handles_; }
template<> inline GfxArray<GfxImage> &objects_<GfxImage>() { return images_; }
template<> inline GfxArray<uint64_t> &object_refs_<GfxImage>() { return image_refs_; }
template<> inline GfxArray<GfxMetadata> &object_metadata_<GfxImage>() { return image_metadata_; }
template<> inline GfxHandles &object_handles_<GfxImage>() { return image_handles_; }
template<> inline GfxArray<GfxMaterial> &objects_<GfxMaterial>() { return materials_; }
template<> inline GfxArray<uint64_t> &object_refs_<GfxMaterial>() { return material_refs_; }
template<> inline GfxArray<GfxMetadata> &object_metadata_<GfxMaterial>() { return material_metadata_; }
template<> inline GfxHandles &object_handles_<GfxMaterial>() { return material_handles_; }
template<> inline GfxArray<GfxMesh> &objects_<GfxMesh>() { return meshes_; }
template<> inline GfxArray<uint64_t> &object_refs_<GfxMesh>() { return mesh_refs_; }
template<> inline GfxArray<GfxMetadata> &object_metadata_<GfxMesh>() { return mesh_metadata_; }
template<> inline GfxHandles &object_handles_<GfxMesh>() { return mesh_handles_; }
template<> inline GfxArray<GfxInstance> &objects_<GfxInstance>() { return instances_; }
template<> inline GfxArray<uint64_t> &object_refs_<GfxInstance>() { return instance_refs_; }
template<> inline GfxArray<GfxMetadata> &object_metadata_<GfxInstance>() { return instance_metadata_; }
template<> inline GfxHandles &object_handles_<GfxInstance>() { return instance_handles_; }
public:
GfxSceneInternal(GfxScene &scene) : gltf_node_handles_("gltf_node"), animation_handles_("animation"), skin_handles_("skin"), camera_handles_("camera")
, image_handles_("image"), material_handles_("material"), mesh_handles_("mesh"), instance_handles_("instance")
{ scene.handle = reinterpret_cast<uint64_t>(this); }
~GfxSceneInternal() { terminate(); }
GfxResult initialize()
{
return kGfxResult_NoError;
}
GfxResult terminate()
{
GFX_TRY(clear());
return kGfxResult_NoError;
}
GfxResult import(GfxScene const &scene, char const *asset_file)
{
if(asset_file == nullptr)
return kGfxResult_InvalidParameter;
char const *asset_extension = strrchr(asset_file, '.');
if(asset_extension == nullptr)
return GFX_SET_ERROR(kGfxResult_InvalidParameter, "Unable to determine extension for asset file `%s'", asset_file);
if(CaseInsensitiveCompare(asset_extension, ".obj") ||
CaseInsensitiveCompare(asset_extension, ".objm"))
GFX_TRY(importObj(scene, asset_file));
else if(CaseInsensitiveCompare(asset_extension, ".glb") ||
CaseInsensitiveCompare(asset_extension, ".gltf"))
GFX_TRY(importGltf(scene, asset_file));
else if(CaseInsensitiveCompare(asset_extension, ".hdr"))
GFX_TRY(importHdr(scene, asset_file));
else if(CaseInsensitiveCompare(asset_extension, ".dds"))
GFX_TRY(importDds(scene, asset_file));
#ifdef GFX_ENABLE_SCENE_KTX
else if(CaseInsensitiveCompare(asset_extension, ".ktx2") ||
CaseInsensitiveCompare(asset_extension, ".ktx"))
GFX_TRY(importKtx(scene, asset_file));
#endif
else if(CaseInsensitiveCompare(asset_extension, ".exr"))
GFX_TRY(importExr(scene, asset_file));
else if(CaseInsensitiveCompare(asset_extension, ".bmp") ||
CaseInsensitiveCompare(asset_extension, ".png") ||
CaseInsensitiveCompare(asset_extension, ".tga") ||
CaseInsensitiveCompare(asset_extension, ".jpg") ||
CaseInsensitiveCompare(asset_extension, ".jpeg"))
GFX_TRY(importImage(scene, asset_file));
else
return GFX_SET_ERROR(kGfxResult_InvalidOperation, "Cannot import unsupported asset type `%s'", asset_extension);
return kGfxResult_NoError;
}
GfxResult clear()
{
clearObjects<GfxAnimation>();
clearObjects<GfxSkin>();
clearObjects<GfxCamera>();
clearObjects<GfxLight>();
clearObjects<GfxImage>();
clearObjects<GfxMaterial>();
clearObjects<GfxMesh>();
clearObjects<GfxInstance>();
clearNodes();
return kGfxResult_NoError;
}
GfxResult applyAnimation(uint64_t animation_handle, float time_in_seconds)
{
if(!animation_handles_.has_handle(animation_handle))
return GFX_SET_ERROR(kGfxResult_InvalidOperation, "Cannot apply animation of an invalid object");
GltfAnimation const *gltf_animation = gltf_animations_.at(GetObjectIndex(animation_handle));
if(gltf_animation == nullptr)
return kGfxResult_NoError;
applyAnimation(*gltf_animation, time_in_seconds);
updateTransforms(*gltf_animation);
return kGfxResult_NoError;
}
GfxResult resetAnimation(uint64_t animation_handle)
{
if(!animation_handles_.has_handle(animation_handle))
return GFX_SET_ERROR(kGfxResult_InvalidOperation, "Cannot reset animation of an invalid object");
GltfAnimation const *gltf_animation = gltf_animations_.at(GetObjectIndex(animation_handle));
if(gltf_animation != nullptr)
{
std::function<void(uint64_t, glm::dmat4 const &)> VisitNode;
VisitNode = [&](uint64_t node_handle, glm::dmat4 const &parent_transform)
{
if(!gltf_node_handles_.has_handle(node_handle)) return;
GltfNode const &node = gltf_nodes_[GetObjectIndex(node_handle)];
glm::dmat4 const transform = parent_transform * node.default_local_transform_;
for(size_t i = 0; i < node.children_.size(); ++i)
VisitNode(node.children_[i], transform);
for(size_t i = 0; i < node.instances_.size(); ++i)
if(node.instances_[i])
node.instances_[i]->transform = glm::mat4(transform);
if(node.camera_)
TransformGltfCamera(*node.camera_, transform);
if(node.light_)
TransformGltfLight(*node.light_, transform);
};
for(size_t i = 0; i < gltf_animation->animated_root_nodes_.size(); ++i)
VisitNode(gltf_animation->animated_root_nodes_[i], glm::dmat4(1.0));
for(size_t i = 0; i < gltf_animation->channels_.size(); ++i)
{
GltfAnimationChannel const &channel = gltf_animation->channels_[i];
if(!gltf_node_handles_.has_handle(channel.node_) || (channel.type_ != kGltfAnimationChannelType_Weights)) continue;
GltfNode const &node = gltf_nodes_[GetObjectIndex(channel.node_)];
for(size_t j = 0; j < node.instances_.size(); ++j)
{
if(!node.instances_[j]) continue;
if(!node.default_weights_.empty())
node.instances_[j]->weights = node.default_weights_;
else if(!node.instances_[j]->mesh->default_weights.empty())
node.instances_[j]->weights = node.instances_[j]->mesh->default_weights;
else
std::fill(node.instances_[j]->weights.begin(), node.instances_[j]->weights.end(), 0.0f);
}
}
}
return kGfxResult_NoError;
}
GfxResult resetAllAnimation()
{
uint32_t const animation_count = animation_refs_.size();
for(uint32_t i = 0; i < animation_count; ++i)
{
uint64_t const animation_handle = animation_refs_[animation_refs_.get_index(i)];
resetAnimation(animation_handle); // reset animation
}
return kGfxResult_NoError;
}
float getAnimationLength(uint64_t animation_handle)
{
if(!animation_handles_.has_handle(animation_handle))
{
GFX_PRINT_ERROR(kGfxResult_InvalidOperation, "Cannot get the duration of an invalid animation object");
return 0.0f; // invalid operation
}
float animation_length = 0.0f;
GltfAnimation const *gltf_animation = gltf_animations_.at(GetObjectIndex(animation_handle));
if(gltf_animation != nullptr)
for(size_t i = 0; i < gltf_animation->channels_.size(); ++i)
if(!gltf_animation->channels_[i].keyframes_.empty())
animation_length = GFX_MAX(animation_length, gltf_animation->channels_[i].keyframes_.back());
return animation_length;
}
GfxResult setActiveCamera(GfxScene const &scene, uint64_t camera_handle)
{
active_camera_.handle = camera_handle;
active_camera_.scene = scene;
return kGfxResult_NoError;
}
GfxRef<GfxCamera> getActiveCamera()
{
return active_camera_;
}
template<typename TYPE>
GfxRef<TYPE> createObject(GfxScene const &scene)
{
GfxRef<TYPE> object_ref = {};
object_ref.handle = object_handles_<TYPE>().allocate_handle();
object_refs_<TYPE>().insert(GetObjectIndex(object_ref.handle), object_ref.handle);
object_metadata_<TYPE>().insert(GetObjectIndex(object_ref.handle)).is_valid = true;
objects_<TYPE>().insert(GetObjectIndex(object_ref.handle)) = {};
object_ref.scene = scene;
return object_ref;
}
template<typename TYPE>
GfxResult destroyObjectCallback(uint64_t object_handle);
template<>
GfxResult destroyObjectCallback<GfxAnimation>(uint64_t object_handle)
{
GFX_ASSERT(animation_handles_.has_handle(object_handle));
GltfAnimation const *gltf_animation = gltf_animations_.at(GetObjectIndex(object_handle));
if(gltf_animation != nullptr)
gltf_animations_.erase(GetObjectIndex(object_handle));
return kGfxResult_NoError;
}
template<>
GfxResult destroyObjectCallback<GfxSkin>(uint64_t object_handle)
{
GFX_ASSERT(skin_handles_.has_handle(object_handle));
GltfSkin const *gltf_skin = gltf_skins_.at(GetObjectIndex(object_handle));
if(gltf_skin != nullptr)
gltf_skins_.erase(GetObjectIndex(object_handle));
return kGfxResult_NoError;
}
template<typename TYPE>
GfxResult destroyObject(uint64_t object_handle)
{
if(object_handle == 0)
return kGfxResult_NoError;
if(!object_handles_<TYPE>().has_handle(object_handle))
return GFX_SET_ERROR(kGfxResult_InvalidOperation, "Cannot destroy invalid scene object");
destroyObjectCallback<TYPE>(object_handle);
objects_<TYPE>().erase(GetObjectIndex(object_handle));
object_refs_<TYPE>().erase(GetObjectIndex(object_handle));
object_metadata_<TYPE>().erase(GetObjectIndex(object_handle));
object_handles_<TYPE>().free_handle(object_handle);
return kGfxResult_NoError;
}
template<typename TYPE>
GfxResult clearObjects()
{
while(getObjectCount<TYPE>() > 0)
GFX_TRY(destroyObject<TYPE>(object_refs_<TYPE>().data()[0]));
return kGfxResult_NoError;
}
GfxResult clearNodes()
{
std::function<void(uint64_t)> VisitNode;
VisitNode = [&](uint64_t node_handle)
{
if(!gltf_node_handles_.has_handle(node_handle)) return;
GltfNode const &node = gltf_nodes_[GetObjectIndex(node_handle)];
for(uint64_t child_handle : node.children_)
VisitNode(child_handle); // release child nodes
gltf_node_handles_.free_handle(node_handle);
gltf_nodes_.erase(GetObjectIndex(node_handle));
if(gltf_animated_nodes_.has(GetObjectIndex(node_handle)))
gltf_animated_nodes_.erase(GetObjectIndex(node_handle));
};
for(uint64_t node_handle : scene_gltf_nodes_)
VisitNode(node_handle);
scene_gltf_nodes_.clear();
return kGfxResult_NoError;
}
template<typename TYPE>
uint32_t getObjectCount()
{
return objects_<TYPE>().size();
}
template<typename TYPE>
TYPE const *getObjects()
{
return objects_<TYPE>().data();
}
template<typename TYPE>
TYPE *getObject(uint64_t object_handle)
{
if(!object_handles_<TYPE>().has_handle(object_handle))
return nullptr; // invalid object handle
return objects_<TYPE>().at(GetObjectIndex(object_handle));
}
template<typename TYPE>
GfxRef<TYPE> getObjectHandle(GfxScene const &scene, uint32_t object_index)
{
GfxRef<TYPE> object_ref = {};
if(object_index >= object_refs_<TYPE>().size())
return object_ref; // out of bounds
object_ref.handle = object_refs_<TYPE>()[object_refs_<TYPE>().get_index(object_index)];
object_ref.scene = scene;
return object_ref;
}
template<typename TYPE>
GfxMetadata const &getObjectMetadata(uint64_t object_handle)
{
static GfxMetadata const metadata = {};
if(!object_handles_<TYPE>().has_handle(object_handle))
return metadata; // invalid object handle
return object_metadata_<TYPE>()[GetObjectIndex(object_handle)];
}
template<typename TYPE>
bool setObjectMetadata(uint64_t object_handle, GfxMetadata const &metadata)
{
if(!object_handles_<TYPE>().has_handle(object_handle))
return false; // invalid object handle
GfxMetadata &object_metadata = object_metadata_<TYPE>()[GetObjectIndex(object_handle)];
object_metadata = metadata; // commit metadata
object_metadata.is_valid = true;
return true;
}
static inline GfxSceneInternal *GetGfxScene(GfxScene scene) { return reinterpret_cast<GfxSceneInternal *>(scene.handle); }
private:
static inline uint32_t GetObjectIndex(uint64_t object_handle)
{
return (uint32_t)(object_handle != 0 ? object_handle & 0xFFFFFFFFull : 0xFFFFFFFFull);
}
static inline bool CaseInsensitiveCompare(char const *str1, char const *str2)
{
GFX_ASSERT(str1 != nullptr && str2 != nullptr);
for(uint32_t i = 0;; ++i)
if(tolower(str1[i]) != tolower(str2[i]))
return false;
else if(str1[i] == '\0')
break;
return true;
}
// The cgltf_node_transform_local function adaptation
static inline glm::dmat4 CalculateNodeTransform(glm::dvec3 trans, glm::dquat rot, glm::dvec3 scale)
{
glm::dmat4 transform;
transform[0].x = (1 - 2.0 * rot.y * rot.y - 2.0 * rot.z * rot.z) * scale.x;
transform[0].y = (2.0 * rot.x * rot.y + 2.0 * rot.z * rot.w) * scale.x;
transform[0].z = (2.0 * rot.x * rot.z - 2.0 * rot.y * rot.w) * scale.x;
transform[0].w = 0.0;
transform[1].x = (2.0 * rot.x * rot.y - 2.0 * rot.z * rot.w) * scale.x;
transform[1].y = (1.0 - 2.0 * rot.x * rot.x - 2.0 * rot.z * rot.z) * scale.x;
transform[1].z = (2.0 * rot.y * rot.z + 2 * rot.x * rot.w) * scale.x;
transform[1].w = 0.0;
transform[2].x = (2.0 * rot.x * rot.z + 2.0 * rot.y * rot.w) * scale.x;
transform[2].y = (2.0 * rot.y * rot.z - 2.0 * rot.x * rot.w) * scale.x;
transform[2].z = (1.0 - 2.0 * rot.x * rot.x - 2.0 * rot.y * rot.y) * scale.x;
transform[2].w = 0.0;
transform[3].x = trans.x;
transform[3].y = trans.y;
transform[3].z = trans.z;
transform[3].w = 1.0;
return transform;
}
static inline void TransformGltfCamera(GfxCamera &camera, glm::dmat4 const &transform)
{
glm::dvec4 eye(0.0, 0.0, 0.0, 1.0);
glm::dvec4 center(0.0, 0.0, -1.0, 1.0);
glm::dvec4 up(0.0, 1.0, 0.0, 0.0);
eye = transform * eye;
center = transform * center;
up = transform * up;
camera.eye = glm::vec3(eye / eye.w);
camera.center = glm::vec3(center / center.w);
camera.up = glm::vec3(glm::normalize(up));
}
static inline void TransformGltfLight(GfxLight& light, glm::dmat4 const& transform)
{
glm::dvec4 position(0.0, 0.0, 0.0, 1.0);
glm::dvec4 direction(0.0, 0.0, 1.0, 0.0);//Direction oriented toward the light
position = transform * position;
direction = transform * direction;
light.position = glm::vec3(position / position.w);
light.direction = glm::vec3(direction);
}
static inline DXGI_FORMAT GetImageFormat(GfxImage const& image)
{
if(image.format != DXGI_FORMAT_UNKNOWN) return image.format;
if(image.bytes_per_channel != 1 && image.bytes_per_channel != 2 && image.bytes_per_channel != 4) return DXGI_FORMAT_UNKNOWN;
uint32_t const bits = (image.bytes_per_channel << 3);
switch(image.channel_count) {
case 1:
return (bits == 8 ? DXGI_FORMAT_R8_UNORM : bits == 16 ? DXGI_FORMAT_R16_UNORM : DXGI_FORMAT_R32_FLOAT);
case 2:
return (bits == 8 ? DXGI_FORMAT_R8G8_UNORM : bits == 16 ? DXGI_FORMAT_R16G16_UNORM : DXGI_FORMAT_R32G32_FLOAT);
case 4:
return (bits == 8 ? DXGI_FORMAT_R8G8B8A8_UNORM : bits == 16 ? DXGI_FORMAT_R16G16B16A16_UNORM : DXGI_FORMAT_R32G32B32A32_FLOAT);
default:
break;
}
return DXGI_FORMAT_UNKNOWN;
}
static inline DXGI_FORMAT ConvertImageFormatSRGB(const DXGI_FORMAT format)
{
switch(format)
{
case DXGI_FORMAT_R8G8B8A8_UNORM: return DXGI_FORMAT_R8G8B8A8_UNORM_SRGB;
case DXGI_FORMAT_BC1_UNORM: return DXGI_FORMAT_BC1_UNORM_SRGB;
case DXGI_FORMAT_BC2_UNORM: return DXGI_FORMAT_BC2_UNORM_SRGB;
case DXGI_FORMAT_BC3_UNORM: return DXGI_FORMAT_BC3_UNORM_SRGB;
case DXGI_FORMAT_BC7_UNORM: return DXGI_FORMAT_BC7_UNORM_SRGB;
case DXGI_FORMAT_B8G8R8A8_TYPELESS: return DXGI_FORMAT_B8G8R8A8_UNORM_SRGB;
case DXGI_FORMAT_B8G8R8X8_TYPELESS: return DXGI_FORMAT_B8G8R8X8_UNORM_SRGB;
default:
break;
}
return format;
}
static inline DXGI_FORMAT ConvertImageFormatLinear(const DXGI_FORMAT format)
{
switch(format)
{
case DXGI_FORMAT_R8G8B8A8_UNORM_SRGB: return DXGI_FORMAT_R8G8B8A8_UNORM;
case DXGI_FORMAT_BC1_UNORM_SRGB: return DXGI_FORMAT_BC1_UNORM;
case DXGI_FORMAT_BC2_UNORM_SRGB: return DXGI_FORMAT_BC2_UNORM;
case DXGI_FORMAT_BC3_UNORM_SRGB: return DXGI_FORMAT_BC3_UNORM;
case DXGI_FORMAT_BC7_UNORM_SRGB: return DXGI_FORMAT_BC7_UNORM;
case DXGI_FORMAT_B8G8R8A8_UNORM_SRGB: return DXGI_FORMAT_B8G8R8A8_TYPELESS;
case DXGI_FORMAT_B8G8R8X8_UNORM_SRGB: return DXGI_FORMAT_B8G8R8X8_TYPELESS;
default:
break;
}
return format;
}
inline static uint32_t GetBitsPerPixel(DXGI_FORMAT format)
{
switch(format)
{
case DXGI_FORMAT_R32G32B32A32_TYPELESS:
case DXGI_FORMAT_R32G32B32A32_FLOAT:
case DXGI_FORMAT_R32G32B32A32_UINT:
case DXGI_FORMAT_R32G32B32A32_SINT:
return 128;
case DXGI_FORMAT_R32G32B32_TYPELESS:
case DXGI_FORMAT_R32G32B32_FLOAT:
case DXGI_FORMAT_R32G32B32_UINT:
case DXGI_FORMAT_R32G32B32_SINT:
return 96;
case DXGI_FORMAT_R16G16B16A16_TYPELESS:
case DXGI_FORMAT_R16G16B16A16_FLOAT:
case DXGI_FORMAT_R16G16B16A16_UNORM:
case DXGI_FORMAT_R16G16B16A16_UINT:
case DXGI_FORMAT_R16G16B16A16_SNORM:
case DXGI_FORMAT_R16G16B16A16_SINT:
case DXGI_FORMAT_R32G32_TYPELESS:
case DXGI_FORMAT_R32G32_FLOAT:
case DXGI_FORMAT_R32G32_UINT:
case DXGI_FORMAT_R32G32_SINT:
case DXGI_FORMAT_R32G8X24_TYPELESS:
case DXGI_FORMAT_D32_FLOAT_S8X24_UINT:
case DXGI_FORMAT_R32_FLOAT_X8X24_TYPELESS:
case DXGI_FORMAT_X32_TYPELESS_G8X24_UINT:
case DXGI_FORMAT_Y416:
case DXGI_FORMAT_Y210:
case DXGI_FORMAT_Y216:
return 64;
case DXGI_FORMAT_R10G10B10A2_TYPELESS:
case DXGI_FORMAT_R10G10B10A2_UNORM:
case DXGI_FORMAT_R10G10B10A2_UINT:
case DXGI_FORMAT_R11G11B10_FLOAT:
case DXGI_FORMAT_R8G8B8A8_TYPELESS:
case DXGI_FORMAT_R8G8B8A8_UNORM:
case DXGI_FORMAT_R8G8B8A8_UNORM_SRGB:
case DXGI_FORMAT_R8G8B8A8_UINT:
case DXGI_FORMAT_R8G8B8A8_SNORM:
case DXGI_FORMAT_R8G8B8A8_SINT:
case DXGI_FORMAT_R16G16_TYPELESS:
case DXGI_FORMAT_R16G16_FLOAT:
case DXGI_FORMAT_R16G16_UNORM:
case DXGI_FORMAT_R16G16_UINT:
case DXGI_FORMAT_R16G16_SNORM:
case DXGI_FORMAT_R16G16_SINT:
case DXGI_FORMAT_R32_TYPELESS:
case DXGI_FORMAT_D32_FLOAT:
case DXGI_FORMAT_R32_FLOAT:
case DXGI_FORMAT_R32_UINT:
case DXGI_FORMAT_R32_SINT:
case DXGI_FORMAT_R24G8_TYPELESS:
case DXGI_FORMAT_D24_UNORM_S8_UINT:
case DXGI_FORMAT_R24_UNORM_X8_TYPELESS:
case DXGI_FORMAT_X24_TYPELESS_G8_UINT:
case DXGI_FORMAT_R9G9B9E5_SHAREDEXP:
case DXGI_FORMAT_R8G8_B8G8_UNORM:
case DXGI_FORMAT_G8R8_G8B8_UNORM:
case DXGI_FORMAT_B8G8R8A8_UNORM:
case DXGI_FORMAT_B8G8R8X8_UNORM:
case DXGI_FORMAT_R10G10B10_XR_BIAS_A2_UNORM:
case DXGI_FORMAT_B8G8R8A8_TYPELESS:
case DXGI_FORMAT_B8G8R8A8_UNORM_SRGB:
case DXGI_FORMAT_B8G8R8X8_TYPELESS:
case DXGI_FORMAT_B8G8R8X8_UNORM_SRGB:
case DXGI_FORMAT_AYUV:
case DXGI_FORMAT_Y410:
case DXGI_FORMAT_YUY2:
return 32;
case DXGI_FORMAT_P010:
case DXGI_FORMAT_P016:
return 24;
case DXGI_FORMAT_R8G8_TYPELESS:
case DXGI_FORMAT_R8G8_UNORM:
case DXGI_FORMAT_R8G8_UINT:
case DXGI_FORMAT_R8G8_SNORM:
case DXGI_FORMAT_R8G8_SINT:
case DXGI_FORMAT_R16_TYPELESS:
case DXGI_FORMAT_R16_FLOAT:
case DXGI_FORMAT_D16_UNORM:
case DXGI_FORMAT_R16_UNORM:
case DXGI_FORMAT_R16_UINT:
case DXGI_FORMAT_R16_SNORM:
case DXGI_FORMAT_R16_SINT:
case DXGI_FORMAT_B5G6R5_UNORM:
case DXGI_FORMAT_B5G5R5A1_UNORM:
case DXGI_FORMAT_A8P8:
case DXGI_FORMAT_B4G4R4A4_UNORM:
return 16;
case DXGI_FORMAT_NV12:
case DXGI_FORMAT_420_OPAQUE:
case DXGI_FORMAT_NV11:
return 12;
case DXGI_FORMAT_R8_TYPELESS:
case DXGI_FORMAT_R8_UNORM:
case DXGI_FORMAT_R8_UINT:
case DXGI_FORMAT_R8_SNORM:
case DXGI_FORMAT_R8_SINT:
case DXGI_FORMAT_A8_UNORM:
case DXGI_FORMAT_AI44:
case DXGI_FORMAT_IA44:
case DXGI_FORMAT_P8:
return 8;
case DXGI_FORMAT_R1_UNORM:
return 1;
case DXGI_FORMAT_BC1_TYPELESS:
case DXGI_FORMAT_BC1_UNORM:
case DXGI_FORMAT_BC1_UNORM_SRGB:
case DXGI_FORMAT_BC4_TYPELESS:
case DXGI_FORMAT_BC4_UNORM:
case DXGI_FORMAT_BC4_SNORM:
return 4;
case DXGI_FORMAT_BC2_TYPELESS:
case DXGI_FORMAT_BC2_UNORM:
case DXGI_FORMAT_BC2_UNORM_SRGB:
case DXGI_FORMAT_BC3_TYPELESS:
case DXGI_FORMAT_BC3_UNORM:
case DXGI_FORMAT_BC3_UNORM_SRGB:
case DXGI_FORMAT_BC5_TYPELESS:
case DXGI_FORMAT_BC5_UNORM:
case DXGI_FORMAT_BC5_SNORM:
case DXGI_FORMAT_BC6H_TYPELESS:
case DXGI_FORMAT_BC6H_UF16:
case DXGI_FORMAT_BC6H_SF16:
case DXGI_FORMAT_BC7_TYPELESS:
case DXGI_FORMAT_BC7_UNORM:
case DXGI_FORMAT_BC7_UNORM_SRGB:
return 8;
default:
return 0;
}
}
inline static uint32_t GetNumChannels(DXGI_FORMAT format)
{
switch(format)
{
case DXGI_FORMAT_R32G32B32A32_TYPELESS:
case DXGI_FORMAT_R32G32B32A32_FLOAT:
case DXGI_FORMAT_R32G32B32A32_UINT:
case DXGI_FORMAT_R32G32B32A32_SINT:
case DXGI_FORMAT_R16G16B16A16_TYPELESS:
case DXGI_FORMAT_R16G16B16A16_FLOAT:
case DXGI_FORMAT_R16G16B16A16_UNORM:
case DXGI_FORMAT_R16G16B16A16_UINT:
case DXGI_FORMAT_R16G16B16A16_SNORM:
case DXGI_FORMAT_R16G16B16A16_SINT:
case DXGI_FORMAT_R10G10B10A2_TYPELESS:
case DXGI_FORMAT_R10G10B10A2_UNORM:
case DXGI_FORMAT_R10G10B10A2_UINT:
case DXGI_FORMAT_R8G8B8A8_TYPELESS:
case DXGI_FORMAT_R8G8B8A8_UNORM:
case DXGI_FORMAT_R8G8B8A8_UNORM_SRGB:
case DXGI_FORMAT_R8G8B8A8_UINT:
case DXGI_FORMAT_R8G8B8A8_SNORM:
case DXGI_FORMAT_R8G8B8A8_SINT:
case DXGI_FORMAT_R9G9B9E5_SHAREDEXP:
case DXGI_FORMAT_B5G5R5A1_UNORM:
case DXGI_FORMAT_B8G8R8A8_UNORM:
case DXGI_FORMAT_B8G8R8X8_UNORM:
case DXGI_FORMAT_R10G10B10_XR_BIAS_A2_UNORM:
case DXGI_FORMAT_B8G8R8A8_TYPELESS:
case DXGI_FORMAT_B8G8R8A8_UNORM_SRGB:
case DXGI_FORMAT_B8G8R8X8_TYPELESS:
case DXGI_FORMAT_B8G8R8X8_UNORM_SRGB:
case DXGI_FORMAT_B4G4R4A4_UNORM:
case DXGI_FORMAT_BC2_TYPELESS:
case DXGI_FORMAT_BC2_UNORM:
case DXGI_FORMAT_BC2_UNORM_SRGB:
case DXGI_FORMAT_BC3_TYPELESS:
case DXGI_FORMAT_BC3_UNORM:
case DXGI_FORMAT_BC3_UNORM_SRGB:
case DXGI_FORMAT_BC7_TYPELESS: // BC7 could also be 3 channel, there is no way of knowing
case DXGI_FORMAT_BC7_UNORM:
case DXGI_FORMAT_BC7_UNORM_SRGB:
return 4;
case DXGI_FORMAT_R32G32B32_TYPELESS:
case DXGI_FORMAT_R32G32B32_FLOAT:
case DXGI_FORMAT_R32G32B32_UINT:
case DXGI_FORMAT_R32G32B32_SINT:
case DXGI_FORMAT_R11G11B10_FLOAT:
case DXGI_FORMAT_R8G8_B8G8_UNORM:
case DXGI_FORMAT_G8R8_G8B8_UNORM:
case DXGI_FORMAT_B5G6R5_UNORM:
case DXGI_FORMAT_BC1_TYPELESS:
case DXGI_FORMAT_BC1_UNORM:
case DXGI_FORMAT_BC1_UNORM_SRGB:
case DXGI_FORMAT_AYUV:
case DXGI_FORMAT_Y410:
case DXGI_FORMAT_Y416:
case DXGI_FORMAT_NV12:
case DXGI_FORMAT_P010:
case DXGI_FORMAT_P016:
case DXGI_FORMAT_420_OPAQUE:
case DXGI_FORMAT_YUY2:
case DXGI_FORMAT_Y210:
case DXGI_FORMAT_Y216:
case DXGI_FORMAT_NV11:
case DXGI_FORMAT_AI44:
case DXGI_FORMAT_IA44:
case DXGI_FORMAT_P8:
case DXGI_FORMAT_A8P8:
case DXGI_FORMAT_P208:
case DXGI_FORMAT_V208:
case DXGI_FORMAT_V408:
case DXGI_FORMAT_BC6H_TYPELESS:
case DXGI_FORMAT_BC6H_UF16:
case DXGI_FORMAT_BC6H_SF16:
return 3;
case DXGI_FORMAT_R32G32_TYPELESS:
case DXGI_FORMAT_R32G32_FLOAT:
case DXGI_FORMAT_R32G32_UINT:
case DXGI_FORMAT_R32G32_SINT:
case DXGI_FORMAT_R32G8X24_TYPELESS:
case DXGI_FORMAT_D32_FLOAT_S8X24_UINT:
case DXGI_FORMAT_R16G16_TYPELESS:
case DXGI_FORMAT_R16G16_FLOAT:
case DXGI_FORMAT_R16G16_UNORM:
case DXGI_FORMAT_R16G16_UINT:
case DXGI_FORMAT_R16G16_SNORM:
case DXGI_FORMAT_R16G16_SINT:
case DXGI_FORMAT_R24G8_TYPELESS:
case DXGI_FORMAT_D24_UNORM_S8_UINT:
case DXGI_FORMAT_R8G8_TYPELESS:
case DXGI_FORMAT_R8G8_UNORM:
case DXGI_FORMAT_R8G8_UINT:
case DXGI_FORMAT_R8G8_SNORM:
case DXGI_FORMAT_R8G8_SINT:
case DXGI_FORMAT_BC5_TYPELESS:
case DXGI_FORMAT_BC5_UNORM:
case DXGI_FORMAT_BC5_SNORM:
return 2;
case DXGI_FORMAT_R32_FLOAT_X8X24_TYPELESS:
case DXGI_FORMAT_X32_TYPELESS_G8X24_UINT:
case DXGI_FORMAT_R32_TYPELESS:
case DXGI_FORMAT_D32_FLOAT:
case DXGI_FORMAT_R32_FLOAT:
case DXGI_FORMAT_R32_UINT:
case DXGI_FORMAT_R32_SINT:
case DXGI_FORMAT_R24_UNORM_X8_TYPELESS:
case DXGI_FORMAT_X24_TYPELESS_G8_UINT:
case DXGI_FORMAT_R16_TYPELESS:
case DXGI_FORMAT_R16_FLOAT:
case DXGI_FORMAT_D16_UNORM:
case DXGI_FORMAT_R16_UNORM:
case DXGI_FORMAT_R16_UINT:
case DXGI_FORMAT_R16_SNORM:
case DXGI_FORMAT_R16_SINT:
case DXGI_FORMAT_R8_TYPELESS:
case DXGI_FORMAT_R8_UNORM:
case DXGI_FORMAT_R8_UINT:
case DXGI_FORMAT_R8_SNORM:
case DXGI_FORMAT_R8_SINT:
case DXGI_FORMAT_A8_UNORM:
case DXGI_FORMAT_R1_UNORM:
case DXGI_FORMAT_BC4_TYPELESS:
case DXGI_FORMAT_BC4_UNORM:
case DXGI_FORMAT_BC4_SNORM:
return 1;
default: return 0;
}
}
template<typename T>
static inline bool UnpackAccessor(cgltf_accessor const *accessor, std::vector<T> &buffer)
{
if(accessor == nullptr) return true;
GFX_ASSERT(sizeof(T) == cgltf_num_components(accessor->type) * sizeof(float));
buffer.resize(accessor->count);
cgltf_size floats_size = cgltf_num_components(accessor->type) * accessor->count;
if(cgltf_accessor_unpack_floats(accessor, (float*)&buffer[0], floats_size) < floats_size)
{
GFX_PRINT_ERROR(kGfxResult_InternalError, "Failed to unpack sparse accessor");
return false;
}
return true;
};
void applyAnimation(GltfAnimation const &gltf_animation, float time_in_seconds)
{
for(size_t i = 0; i < gltf_animation.channels_.size(); ++i)
{
GltfAnimationChannel const &animation_channel = gltf_animation.channels_[i];
if(!gltf_node_handles_.has_handle(animation_channel.node_)) continue; // invalid target node
GltfAnimatedNode *animated_node = gltf_animated_nodes_.at(GetObjectIndex(animation_channel.node_));
if(animation_channel.keyframes_.empty() || ((animation_channel.type_ != kGltfAnimationChannelType_Weights) &&
(animated_node == nullptr))) { GFX_ASSERT(0); continue; }
if(animation_channel.keyframes_.empty()) { GFX_ASSERT(0); continue; }
intptr_t const keyframe = std::lower_bound(animation_channel.keyframes_.begin(),
animation_channel.keyframes_.end(), time_in_seconds) - animation_channel.keyframes_.begin();
size_t const previous_index = std::max(keyframe - 1, 0ll);
size_t const next_index = std::min(keyframe, (intptr_t)animation_channel.keyframes_.size() - 1);
double interpolate = 0.0;
if((animation_channel.mode_ == kGltfAnimationChannelMode_Linear) && (previous_index != next_index))
{
interpolate = ((double)time_in_seconds - (double)animation_channel.keyframes_[keyframe - 1]) /
((double)animation_channel.keyframes_[keyframe] - (double)animation_channel.keyframes_[keyframe - 1]);
}
if(animation_channel.type_ == kGltfAnimationChannelType_Translate)
{
for(uint32_t j = 0; j < 3; ++j)
{
animated_node->translate_[j] = glm::mix(animation_channel.values_[3 * previous_index + j],
animation_channel.values_[3 * next_index + j], interpolate);
}
}
else if(animation_channel.type_ == kGltfAnimationChannelType_Rotate)
{
glm::dquat const previous = glm::dquat(animation_channel.values_[4 * previous_index + 3], animation_channel.values_[4 * previous_index],
animation_channel.values_[4 * previous_index + 1], animation_channel.values_[4 * previous_index + 2]);
glm::dquat const next = glm::dquat(animation_channel.values_[4 * next_index + 3], animation_channel.values_[4 * next_index],
animation_channel.values_[4 * next_index + 1], animation_channel.values_[4 * next_index + 2]);
animated_node->rotate_ = glm::slerp(previous, next, interpolate);
}
else if(animation_channel.type_ == kGltfAnimationChannelType_Scale)
{
for(uint32_t j = 0; j < 3; ++j)
{
animated_node->scale_[j] = glm::mix(animation_channel.values_[3 * previous_index + j],
animation_channel.values_[3 * next_index + j], interpolate);
}
}
else
{
size_t const weights_count = animation_channel.values_.size() / animation_channel.keyframes_.size();
std::vector<float> weights;
weights.resize(weights_count);
for(size_t j = 0; j < weights_count; ++j)
{
weights[j] = glm::mix(animation_channel.values_[previous_index * weights_count + j],
animation_channel.values_[next_index * weights_count + j], interpolate);
}
GltfNode const &node = gltf_nodes_[GetObjectIndex(animation_channel.node_)];
for(size_t j = 0; j < node.instances_.size(); ++j)
{
if(!node.instances_[j]) continue;
node.instances_[j]->weights = weights;
}
}
}
}
void updateTransforms(GltfAnimation const &gltf_animation)
{
std::function<void(uint64_t, glm::dmat4 const &)> VisitNode;
VisitNode = [&](uint64_t node_handle, glm::dmat4 const &parent_transform)
{
GFX_ASSERT(gltf_node_handles_.has_handle(node_handle));
GltfNode &node = gltf_nodes_[GetObjectIndex(node_handle)];
GltfAnimatedNode *animated_node = gltf_animated_nodes_.at(GetObjectIndex(node_handle));
if(animated_node == nullptr)