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Merge pull request #2451 from mlavik1/fbxexporter_embedded_textures 

FBXExporter: Embedded texture support
pull/2450/head^2
Kim Kulling 2019-05-10 15:30:57 +02:00 committed by GitHub
parent 9430696048 700954c115
commit f81b90a469
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
9 changed files with 130 additions and 27 deletions
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4
code/FBXCommon.h
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@ -47,7 +47,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef ASSIMP_BUILD_NO_FBX_EXPORTER
namespace Assimp {
namespace FBX
{
const std::string NULL_RECORD = { // 13 null bytes
@ -80,7 +80,7 @@ namespace FBX
TransformInheritance_MAX // end-of-enum sentinel
};
}
}
#endif // ASSIMP_BUILD_NO_FBX_EXPORTER
#endif // AI_FBXCOMMON_H_INC

5
code/FBXExportNode.cpp
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@ -54,6 +54,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <sstream> // ostringstream
#include <memory> // shared_ptr
namespace Assimp {
// AddP70<type> helpers... there's no usable pattern here,
// so all are defined as separate functions.
// Even "animatable" properties are often completely different
@ -367,7 +368,7 @@ void FBX::Node::EndBinary(
bool has_children
) {
// if there were children, add a null record
if (has_children) { s.PutString(FBX::NULL_RECORD); }
if (has_children) { s.PutString(Assimp::FBX::NULL_RECORD); }
// now go back and write initial pos
this->end_pos = s.Tell();
@ -563,6 +564,6 @@ void FBX::Node::WritePropertyNode(
FBX::Node::WritePropertyNodeAscii(name, v, s, indent);
}
}
}
#endif // ASSIMP_BUILD_NO_FBX_EXPORTER
#endif // ASSIMP_BUILD_NO_EXPORT

3
code/FBXExportNode.h
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@ -54,6 +54,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <string>
#include <vector>
namespace Assimp {
namespace FBX {
class Node;
}
@ -264,7 +265,7 @@ private: // static helper functions
);
};
}
#endif // ASSIMP_BUILD_NO_FBX_EXPORTER

4
code/FBXExportProperty.cpp
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@ -52,7 +52,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <locale>
#include <sstream> // ostringstream
namespace Assimp {
// constructors for single element properties
FBX::Property::Property(bool v)
@ -359,6 +359,6 @@ void FBX::Property::DumpAscii(std::ostream& s, int indent)
throw runtime_error(err.str());
}
}
}
#endif // ASSIMP_BUILD_NO_FBX_EXPORTER
#endif // ASSIMP_BUILD_NO_EXPORT

3
code/FBXExportProperty.h
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@ -56,6 +56,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <ostream>
#include <type_traits> // is_void
namespace Assimp {
namespace FBX {
class Property;
}
@ -123,7 +124,7 @@ private:
char type;
std::vector<uint8_t> data;
};
}
#endif // ASSIMP_BUILD_NO_FBX_EXPORTER
#endif // AI_FBXEXPORTPROPERTY_H_INC

61
code/FBXExporter.cpp
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@ -45,6 +45,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "FBXExportNode.h"
#include "FBXExportProperty.h"
#include "FBXCommon.h"
#include "FBXUtil.h"
#include <assimp/version.h> // aiGetVersion
#include <assimp/IOSystem.hpp>
@ -73,7 +74,11 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
const ai_real DEG = ai_real( 57.29577951308232087679815481 ); // degrees per radian
using namespace Assimp;
using namespace Assimp::FBX;
// some constants that we'll use for writing metadata
namespace Assimp {
namespace FBX {
const std::string EXPORT_VERSION_STR = "7.4.0";
const uint32_t EXPORT_VERSION_INT = 7400; // 7.4 == 2014/2015
@ -92,11 +97,6 @@ namespace FBX {
";------------------------------------------------------------------";
}
using namespace Assimp;
using namespace FBX;
namespace Assimp {
// ---------------------------------------------------------------------
// Worker function for exporting a scene to binary FBX.
// Prototyped and registered in Exporter.cpp
@ -121,6 +121,7 @@ namespace Assimp {
IOSystem* pIOSystem,
const aiScene* pScene,
const ExportProperties* pProperties
){
// initialize the exporter
FBXExporter exporter(pScene, pProperties);
@ -1393,10 +1394,6 @@ void FBXExporter::WriteObjects ()
// FbxVideo - stores images used by textures.
for (const auto &it : uid_by_image) {
if (it.first.compare(0, 1, "*") == 0) {
// TODO: embedded textures
continue;
}
FBX::Node n("Video");
const int64_t& uid = it.second;
const std::string name = ""; // TODO: ... name???
@ -1406,7 +1403,33 @@ void FBXExporter::WriteObjects ()
// TODO: get full path... relative path... etc... ugh...
// for now just use the same path for everything,
// and hopefully one of them will work out.
const std::string& path = it.first;
std::string path = it.first;
// try get embedded texture
const aiTexture* embedded_texture = mScene->GetEmbeddedTexture(it.first.c_str());
if (embedded_texture != nullptr) {
// change the path (use original filename, if available. If name is empty, concatenate texture index with file extension)
std::stringstream newPath;
if (embedded_texture->mFilename.length > 0) {
newPath << embedded_texture->mFilename.C_Str();
} else if (embedded_texture->achFormatHint[0]) {
int texture_index = std::stoi(path.substr(1, path.size() - 1));
newPath << texture_index << "." << embedded_texture->achFormatHint;
}
path = newPath.str();
// embed the texture
size_t texture_size = static_cast<size_t>(embedded_texture->mWidth * std::max(embedded_texture->mHeight, 1u));
if (binary) {
// embed texture as binary data
std::vector<uint8_t> tex_data;
tex_data.resize(texture_size);
memcpy(&tex_data[0], (char*)embedded_texture->pcData, texture_size);
n.AddChild("Content", tex_data);
} else {
// embed texture in base64 encoding
std::string encoded_texture = FBX::Util::EncodeBase64((char*)embedded_texture->pcData, texture_size);
n.AddChild("Content", encoded_texture);
}
}
p.AddP70("Path", "KString", "XRefUrl", "", path);
n.AddChild(p);
n.AddChild("UseMipMap", int32_t(0));
@ -1419,17 +1442,17 @@ void FBXExporter::WriteObjects ()
// referenced by material_index/texture_type pairs.
std::map<std::pair<size_t,size_t>,int64_t> texture_uids;
const std::map<aiTextureType,std::string> prop_name_by_tt = {
{aiTextureType_DIFFUSE, "DiffuseColor"},
{aiTextureType_SPECULAR, "SpecularColor"},
{aiTextureType_AMBIENT, "AmbientColor"},
{aiTextureType_EMISSIVE, "EmissiveColor"},
{aiTextureType_HEIGHT, "Bump"},
{aiTextureType_NORMALS, "NormalMap"},
{aiTextureType_SHININESS, "ShininessExponent"},
{aiTextureType_OPACITY, "TransparentColor"},
{aiTextureType_DIFFUSE, "DiffuseColor"},
{aiTextureType_SPECULAR, "SpecularColor"},
{aiTextureType_AMBIENT, "AmbientColor"},
{aiTextureType_EMISSIVE, "EmissiveColor"},
{aiTextureType_HEIGHT, "Bump"},
{aiTextureType_NORMALS, "NormalMap"},
{aiTextureType_SHININESS, "ShininessExponent"},
{aiTextureType_OPACITY, "TransparentColor"},
{aiTextureType_DISPLACEMENT, "DisplacementColor"},
//{aiTextureType_LIGHTMAP, "???"},
{aiTextureType_REFLECTION, "ReflectionColor"}
{aiTextureType_REFLECTION, "ReflectionColor"}
//{aiTextureType_UNKNOWN, ""}
};
for (size_t i = 0; i < mScene->mNumMaterials; ++i) {

60
code/FBXUtil.cpp
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@ -157,6 +157,66 @@ size_t DecodeBase64(const char* in, size_t inLength, uint8_t*& out)
return outLength;
}
static const char to_base64_string[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
char EncodeBase64(char byte)
{
return to_base64_string[(size_t)byte];
}
/** Encodes a block of 4 bytes to base64 encoding
*
* @param bytes Bytes to encode.
* @param out_string String to write encoded values to.
* @param string_pos Position in out_string.*/
void EncodeByteBlock(const char* bytes, std::string& out_string, size_t string_pos)
{
char b0 = (bytes[0] & 0xFC) >> 2;
char b1 = (bytes[0] & 0x03) << 4 | ((bytes[1] & 0xF0) >> 4);
char b2 = (bytes[1] & 0x0F) << 2 | ((bytes[2] & 0xC0) >> 6);
char b3 = (bytes[2] & 0x3F);
out_string[string_pos + 0] = EncodeBase64(b0);
out_string[string_pos + 1] = EncodeBase64(b1);
out_string[string_pos + 2] = EncodeBase64(b2);
out_string[string_pos + 3] = EncodeBase64(b3);
}
std::string EncodeBase64(const char* data, size_t length)
{
// calculate extra bytes needed to get a multiple of 3
size_t extraBytes = 3 - length % 3;
// number of base64 bytes
size_t encodedBytes = 4 * (length + extraBytes) / 3;
std::string encoded_string(encodedBytes, '=');
// read blocks of 3 bytes
for (size_t ib3 = 0; ib3 < length / 3; ib3++)
{
const size_t iByte = ib3 * 3;
const size_t iEncodedByte = ib3 * 4;
const char* currData = &data[iByte];
EncodeByteBlock(currData, encoded_string, iEncodedByte);
}
// if size of data is not a multiple of 3, also encode the final bytes (and add zeros where needed)
if (extraBytes > 0)
{
char finalBytes[4] = { 0,0,0,0 };
memcpy(&finalBytes[0], &data[length - length % 3], length % 3);
const size_t iEncodedByte = encodedBytes - 4;
EncodeByteBlock(&finalBytes[0], encoded_string, iEncodedByte);
// add '=' at the end
for (size_t i = 0; i < 4 * extraBytes / 3; i++)
encoded_string[encodedBytes - i - 1] = '=';
}
return encoded_string;
}
} // !Util
} // !FBX
} // !Assimp

9
code/FBXUtil.h
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@ -113,6 +113,15 @@ uint8_t DecodeBase64(char ch);
* @return size of the decoded data (number of bytes)*/
size_t DecodeBase64(const char* in, size_t inLength, uint8_t*& out);
char EncodeBase64(char byte);
/** Encode bytes in base64-encoding
*
* @param data Binary data to encode.
* @param inLength Number of bytes to encode.
* @return base64-encoded string*/
std::string EncodeBase64(const char* data, size_t length);
}
}
}

8
include/assimp/scene.h
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@ -389,6 +389,14 @@ struct aiScene
//! Returns an embedded texture
const aiTexture* GetEmbeddedTexture(const char* filename) const {
// lookup using texture ID (if referenced like: "*1", "*2", etc.)
if ('*' == *filename) {
int index = std::atoi(filename + 1);
if (0 > index || mNumTextures <= static_cast<unsigned>(index))
return nullptr;
return mTextures[index];
}
// lookup using filename
const char* shortFilename = GetShortFilename(filename);
for (unsigned int i = 0; i < mNumTextures; i++) {
const char* shortTextureFilename = GetShortFilename(mTextures[i]->mFilename.C_Str());