maobo/cup_edit
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

allow setting bg texture from ktx

Browse Source
This commit is contained in:
Nick Fisher
2022-09-09 12:59:55 +10:00
parent bac5c07c01
commit 7f2c68b199
7 changed files with 570 additions and 58 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
android/CMakeLists.txt
View File

@@ -10,7 +10,7 @@ add_library(
filament_interop
SHARED
src/main/cpp/filament_android.cpp
src/main/cpp/KtxReader1.cpp
../ios/src/ktxreader/Ktx1Reader.cpp
src/main/cpp/StbProvider.cpp
src/main/cpp/JobSystem.cpp
../ios/src/SceneAssetLoader.cpp

3
example/assets/background.ktx Normal file
View File

@@ -0,0 +1,3 @@
version https://git-lfs.github.com/spec/v1
oid sha256:620bfa644724e9914df19949346ad0f441357fbb176879421d66b4377705836b
size 1048644

4
example/assets/background.png
View File

@@ -1,3 +1,3 @@
version https://git-lfs.github.com/spec/v1
oid sha256:c38fa36cbbbe969a2ae015fe56752343e8d06007c6eea28c56e22ffd56a8db1a
size 2570831
oid sha256:bedb625eca04a9abba66d1521efda591819212e44cef0ab2438631596902140c
size 585493

189
ios/src/FilamentViewer.cpp
View File

@@ -59,8 +59,10 @@
#include <math/vec4.h>
#include <ktxreader/Ktx1Reader.h>
#include <ktxreader/Ktx2Reader.h>
#include <iostream>
#include <fstream>
#include <mutex>
@@ -323,74 +325,132 @@ void FilamentViewer::createImageRenderable() {
_imageEntity = &imageEntity;
Texture *texture = Texture::Builder()
.width(1)
.height(1)
.levels(1)
.format(Texture::InternalFormat::RGBA8)
.sampler(Texture::Sampler::SAMPLER_2D)
.build(*_engine);
static uint32_t pixel = 0;
Texture::PixelBufferDescriptor buffer(&pixel, 4, Texture::Format::RGBA,
Texture::Type::UBYTE);
texture->setImage(*_engine, 0, std::move(buffer));
}
void FilamentViewer::setBackgroundImage(const char *resourcePath) {
static bool endsWith(string path, string ending) {
return path.compare(path.length() - ending.length(), ending.length(), ending) == 0;
}
createImageRenderable();
void FilamentViewer::loadKtx2Texture(string path, ResourceBuffer rb) {
if (_imageTexture) {
_engine->destroy(_imageTexture);
_imageTexture = nullptr;
}
// TODO - check all this
ResourceBuffer bg = _loadResource(resourcePath);
// ktxreader::Ktx2Reader reader(*_engine);
polyvox::StreamBufferAdapter sb((char *)bg.data, (char *)bg.data + bg.size);
// reader.requestFormat(Texture::InternalFormat::DXT3_SRGBA);
// reader.requestFormat(Texture::InternalFormat::DXT3_RGBA);
std::istream *inputStream = new std::istream(&sb);
// // Uncompressed formats are lower priority, so they get added last.
// reader.requestFormat(Texture::InternalFormat::SRGB8_A8);
// reader.requestFormat(Texture::InternalFormat::RGBA8);
LinearImage *image = new LinearImage(ImageDecoder::decode(
*inputStream, resourcePath, ImageDecoder::ColorSpace::SRGB));
// // std::ifstream inputStream("/data/data/app.polyvox.filament_example/foo.ktx", ios::binary);
// // auto contents = vector<uint8_t>((istreambuf_iterator<char>(inputStream)), {});
// _imageTexture = reader.load(contents.data(), contents.size(),
// ktxreader::Ktx2Reader::TransferFunction::LINEAR);
}
void FilamentViewer::loadKtxTexture(string path, ResourceBuffer rb) {
ktxreader::Ktx1Bundle *bundle =
new ktxreader::Ktx1Bundle(static_cast<const uint8_t *>(rb.data),
static_cast<uint32_t>(rb.size));
_imageTexture =
ktxreader::Ktx1Reader::createTexture(_engine, *bundle, false, [](void* userdata) {
Ktx1Bundle* bundle = (Ktx1Bundle*) userdata;
delete bundle;
}, bundle);
auto info = bundle->getInfo();
_imageWidth = info.pixelWidth;
_imageHeight = info.pixelHeight;
}
void FilamentViewer::loadPngTexture(string path, ResourceBuffer rb) {
polyvox::StreamBufferAdapter sb((char *)rb.data, (char *)rb.data + rb.size);
std::istream inputStream(&sb);
LinearImage* image = new LinearImage(ImageDecoder::decode(
inputStream, path.c_str(), ImageDecoder::ColorSpace::SRGB));
if (!image->isValid()) {
Log("Invalid image : %s", resourcePath);
Log("Invalid image : %s", path.c_str());
return;
}
delete inputStream;
_freeResource(bg.id);
uint32_t channels = image->getChannels();
_imageWidth = image->getWidth();
_imageHeight = image->getHeight();
_imageTexture = Texture::Builder()
.width(_imageWidth)
.height(_imageHeight)
.levels(0xff)
.format(channels == 3 ? Texture::InternalFormat::RGB16F
: Texture::InternalFormat::RGBA16F)
.sampler(Texture::Sampler::SAMPLER_2D)
.build(*_engine);
.width(_imageWidth)
.height(_imageHeight)
.levels(0xff)
.format(channels == 3 ? Texture::InternalFormat::RGB16F
: Texture::InternalFormat::RGBA16F)
.sampler(Texture::Sampler::SAMPLER_2D)
.build(*_engine);
Texture::PixelBufferDescriptor::Callback freeCallback = [](void *buf, size_t,
void *data) {
delete reinterpret_cast<LinearImage *>(data);
void *data) {
Log("Deleting LinearImage");
delete reinterpret_cast<LinearImage*>(data);
};
Texture::PixelBufferDescriptor buffer(
image->getPixelRef(), size_t(_imageWidth * _imageHeight * channels * sizeof(float)),
channels == 3 ? Texture::Format::RGB : Texture::Format::RGBA,
Texture::Type::FLOAT, freeCallback);
auto pbd = Texture::PixelBufferDescriptor(
image->getPixelRef(), size_t(_imageWidth * _imageHeight * channels * sizeof(float)),
channels == 3 ? Texture::Format::RGB : Texture::Format::RGBA,
Texture::Type::FLOAT, nullptr, freeCallback, image);
_imageTexture->setImage(*_engine, 0, std::move(buffer));
_imageTexture->generateMipmaps(*_engine);
_imageTexture->setImage(*_engine, 0, std::move(pbd));
}
// This currently just acnhors the image at the bottom left of the viewport at its original size
// TODO - implement stretch/etc
void FilamentViewer::loadTextureFromPath(string path) {
string ktxExt(".ktx");
string ktx2Ext(".ktx2");
string pngExt(".png");
if (path.length() < 5) {
Log("Invalid resource path : %s", path.c_str());
return;
}
ResourceBuffer rb = _loadResource(path.c_str());
if(endsWith(path, ktxExt)) {
loadKtxTexture(path, rb);
} else if(endsWith(path, ktx2Ext)) {
loadKtx2Texture(path, rb);
} else if(endsWith(path, pngExt)) {
loadPngTexture(path, rb);
}
_freeResource(rb.id);
}
void FilamentViewer::setBackgroundImage(const char *resourcePath) {
string resourcePathString(resourcePath);
Log("Setting background image to %s", resourcePath);
createImageRenderable();
if (_imageTexture) {
Log("Destroying existing texture");
_engine->destroy(_imageTexture);
Log("Destroyed.");
_imageTexture = nullptr;
}
loadTextureFromPath(resourcePathString);
// This currently just anchors the image at the bottom left of the viewport at its original size
// TODO - implement stretch/etc
const Viewport& vp = _view->getViewport();
Log("Image width %d height %d vp width %d height %d", _imageWidth, _imageHeight, vp.width, vp.height);
_imageScale = mat4f { float(vp.width) / float(_imageWidth) , 0.0f, 0.0f, 0.0f, 0.0f, float(vp.height) / float(_imageHeight), 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f };
@@ -671,16 +731,18 @@ bool FilamentViewer::setCamera(SceneAsset *asset, const char *cameraName) {
}
void FilamentViewer::loadSkybox(const char *const skyboxPath) {
if (!skyboxPath) {
_scene->setSkybox(nullptr);
} else {
removeSkybox();
if (skyboxPath) {
ResourceBuffer skyboxBuffer = _loadResource(skyboxPath);
image::Ktx1Bundle *skyboxBundle =
new image::Ktx1Bundle(static_cast<const uint8_t *>(skyboxBuffer.data),
static_cast<uint32_t>(skyboxBuffer.size));
_skyboxTexture =
ktxreader::Ktx1Reader::createTexture(_engine, skyboxBundle, false);
ktxreader::Ktx1Reader::createTexture(_engine, *skyboxBundle, false, [](void* userdata) {
image::Ktx1Bundle* bundle = (image::Ktx1Bundle*) userdata;
delete bundle;
}, skyboxBundle);
_skybox =
filament::Skybox::Builder().environment(_skyboxTexture).build(*_engine);
@@ -689,15 +751,29 @@ void FilamentViewer::loadSkybox(const char *const skyboxPath) {
}
}
void FilamentViewer::removeSkybox() { _scene->setSkybox(nullptr); }
void FilamentViewer::removeSkybox() {
if(_skybox) {
_engine->destroy(_skybox);
_engine->destroy(_skyboxTexture);
_skybox = nullptr;
_skyboxTexture = nullptr;
}
_scene->setSkybox(nullptr);
}
void FilamentViewer::removeIbl() { _scene->setIndirectLight(nullptr); }
void FilamentViewer::removeIbl() {
if(_indirectLight) {
_engine->destroy(_indirectLight);
_engine->destroy(_iblTexture);
_indirectLight = nullptr;
_iblTexture = nullptr;
}
_scene->setIndirectLight(nullptr);
}
void FilamentViewer::loadIbl(const char *const iblPath) {
if (!iblPath) {
_scene->setIndirectLight(nullptr);
} else {
removeIbl();
if (iblPath) {
Log("Loading IBL from %s", iblPath);
// Load IBL.
@@ -709,7 +785,10 @@ void FilamentViewer::loadIbl(const char *const iblPath) {
math::float3 harmonics[9];
iblBundle->getSphericalHarmonics(harmonics);
_iblTexture =
ktxreader::Ktx1Reader::createTexture(_engine, iblBundle, false);
ktxreader::Ktx1Reader::createTexture(_engine, *iblBundle, false, [](void* userdata) {
image::Ktx1Bundle* bundle = (image::Ktx1Bundle*) userdata;
delete bundle;
}, iblBundle);
_indirectLight = IndirectLight::Builder()
.reflections(_iblTexture)
.irradiance(3, harmonics)

4
ios/src/FilamentViewer.hpp
View File

@@ -151,6 +151,10 @@ namespace polyvox {
Material* _imageMaterial = nullptr;
TextureSampler _imageSampler;
ColorGrading *colorGrading = nullptr;
void loadKtx2Texture(string path, ResourceBuffer data);
void loadKtxTexture(string path, ResourceBuffer data);
void loadPngTexture(string path, ResourceBuffer data);
void loadTextureFromPath(string path);
void _createManipulator();
uint32_t _lastFrameTimeInNanos;

0
android/src/main/cpp/KtxReader1.cpp → ios/src/ktxreader/Ktx1Reader.cpp
View File

426
ios/src/ktxreader/Ktx2Reader.cpp Normal file
View File

@@ -0,0 +1,426 @@
/*
* Copyright (C) 2022 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <ktxreader/Ktx2Reader.h>
#include <filament/Engine.h>
#include <filament/Texture.h>
#include <utils/Log.h>
#include <atomic>
#include <vector>
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warray-bounds"
#include <basisu_transcoder.h>
#pragma clang diagnostic pop
using namespace basist;
using namespace filament;
using TransferFunction = ktxreader::Ktx2Reader::TransferFunction;
using Result = ktxreader::Ktx2Reader::Result;
using Async = ktxreader::Ktx2Reader::Async;
using Buffer = std::vector<uint8_t>;
namespace {
struct FinalFormatInfo {
const char* name; // <-- for debug purposes only
bool isSupported;
bool isCompressed;
TransferFunction transferFunction;
transcoder_texture_format basisFormat;
Texture::CompressedType compressedPixelDataType;
Texture::Type pixelDataType;
Texture::Format pixelDataFormat;
};
}
// This function returns various information about a Filament internal format, most notably its
// equivalent BasisU enumerant.
//
// Return by value isn't expensive here due to copy elision.
//
// Note that Filament's internal format list mimics the Vulkan format list, which
// embeds transfer function information (i.e. sRGB or not) into the format, whereas
// the basis format list does not.
//
// The following formats supported by BasisU but are not supported by Filament.
//
// transcoder_texture_format::cTFETC1_RGB
// transcoder_texture_format::cTFATC_RGB
// transcoder_texture_format::cTFATC_RGBA
// transcoder_texture_format::cTFFXT1_RGB
// transcoder_texture_format::cTFPVRTC2_4_RGB
// transcoder_texture_format::cTFPVRTC2_4_RGBA
// transcoder_texture_format::cTFPVRTC1_4_RGB
// transcoder_texture_format::cTFPVRTC1_4_RGBA
// transcoder_texture_format::cTFBC4_R
// transcoder_texture_format::cTFBC5_RG
// transcoder_texture_format::cTFBC7_RGBA (this format would add size bloat to the transcoder)
// transcoder_texture_format::cTFBGR565 (note the blue/red swap)
//
static FinalFormatInfo getFinalFormatInfo(Texture::InternalFormat fmt) {
using tif = Texture::InternalFormat;
using tct = Texture::CompressedType;
using tt = Texture::Type;
using tf = Texture::Format;
using ttf = transcoder_texture_format;
const auto sRGB = TransferFunction::sRGB;
const auto LINEAR = TransferFunction::LINEAR;
switch (fmt) {
case tif::ETC2_EAC_SRGBA8: return {"ETC2_EAC_SRGBA8", true, true, sRGB, ttf::cTFETC2_RGBA, tct::ETC2_EAC_RGBA8};
case tif::ETC2_EAC_RGBA8: return {"ETC2_EAC_RGBA8", true, true, LINEAR, ttf::cTFETC2_RGBA, tct::ETC2_EAC_SRGBA8};
case tif::DXT1_SRGB: return {"DXT1_SRGB", true, true, sRGB, ttf::cTFBC1_RGB, tct::DXT1_RGB};
case tif::DXT1_RGB: return {"DXT1_RGB", true, true, LINEAR, ttf::cTFBC1_RGB, tct::DXT1_SRGB};
case tif::DXT5_SRGBA: return {"DXT5_SRGBA", true, true, sRGB, ttf::cTFBC3_RGBA, tct::DXT5_RGBA};
case tif::DXT5_RGBA: return {"DXT5_RGBA", true, true, LINEAR, ttf::cTFBC3_RGBA, tct::DXT5_SRGBA};
case tif::SRGB8_ALPHA8_ASTC_4x4: return {"SRGB8_ALPHA8_ASTC_4x4", true, true, sRGB, ttf::cTFASTC_4x4_RGBA, tct::RGBA_ASTC_4x4};
case tif::RGBA_ASTC_4x4: return {"RGBA_ASTC_4x4", true, true, LINEAR, ttf::cTFASTC_4x4_RGBA, tct::SRGB8_ALPHA8_ASTC_4x4};
case tif::EAC_R11: return {"EAC_R11", true, true, LINEAR, ttf::cTFETC2_EAC_R11, tct::EAC_R11};
// The following format is useful for normal maps.
// Note that BasisU supports only the unsigned variant.
case tif::EAC_RG11: return {"EAC_RG11", true, true, LINEAR, ttf::cTFETC2_EAC_RG11, tct::EAC_RG11};
// Uncompressed formats.
case tif::SRGB8_A8: return {"SRGB8_A8", true, false, sRGB, ttf::cTFRGBA32, {}, tt::UBYTE, tf::RGBA};
case tif::RGBA8: return {"RGBA8", true, false, LINEAR, ttf::cTFRGBA32, {}, tt::UBYTE, tf::RGBA};
case tif::RGB565: return {"RGB565", true, false, LINEAR, ttf::cTFRGB565, {}, tt::USHORT_565, tf::RGB};
case tif::RGBA4: return {"RGBA4", true, false, LINEAR, ttf::cTFRGBA4444, {}, tt::USHORT, tf::RGBA};
default: return {};
}
}
// In theory we could pass "free" directly into the callback but doing so triggers ASAN warnings.
static void freeCallback(void* buf, size_t, void* userdata) {
free(buf);
}
// This helper is used by both the asynchronous and synchronous API's.
static Result transcodeImageLevel(ktx2_transcoder& transcoder,
ktx2_transcoder_state& transcoderState, Texture::InternalFormat format,
uint32_t levelIndex, Texture::PixelBufferDescriptor** pbd) {
using basisu::texture_format;
assert_invariant(levelIndex < KTX2_MAX_SUPPORTED_LEVEL_COUNT);
const FinalFormatInfo formatInfo = getFinalFormatInfo(format);
const texture_format destFormat = basis_get_basisu_texture_format(formatInfo.basisFormat);
const uint32_t layerIndex = 0;
const uint32_t faceIndex = 0;
const uint32_t decodeFlags = 0;
const uint32_t outputRowPitch = 0;
const uint32_t outputRowCount = 0;
const int channel0 = 0;
const int channel1 = 0;
basist::ktx2_image_level_info levelInfo;
transcoder.get_image_level_info(levelInfo, levelIndex, layerIndex, faceIndex);
if (formatInfo.isCompressed) {
const uint32_t qwordsPerBlock = basisu::get_qwords_per_block(destFormat);
const size_t byteCount = sizeof(uint64_t) * qwordsPerBlock * levelInfo.m_total_blocks;
uint64_t* const blocks = (uint64_t*) malloc(byteCount);
if (!transcoder.transcode_image_level(levelIndex, layerIndex, faceIndex, blocks,
levelInfo.m_total_blocks, formatInfo.basisFormat, decodeFlags,
outputRowPitch, outputRowCount, channel0,
channel1, &transcoderState)) {
return Result::COMPRESSED_TRANSCODE_FAILURE;
}
*pbd = new Texture::PixelBufferDescriptor(blocks,
byteCount, formatInfo.compressedPixelDataType, byteCount, freeCallback);
return Result::SUCCESS;
}
const uint32_t rowCount = levelInfo.m_orig_height;
const uint32_t bytesPerPix = basis_get_bytes_per_block_or_pixel(formatInfo.basisFormat);
const size_t byteCount = bytesPerPix * levelInfo.m_orig_width * rowCount;
uint64_t* const rows = (uint64_t*) malloc(byteCount);
if (!transcoder.transcode_image_level(levelIndex, layerIndex, faceIndex, rows,
byteCount / bytesPerPix, formatInfo.basisFormat, decodeFlags,
outputRowPitch, outputRowCount, channel0, channel1, &transcoderState)) {
return Result::UNCOMPRESSED_TRANSCODE_FAILURE;
}
*pbd = new Texture::PixelBufferDescriptor(rows, byteCount,
formatInfo.pixelDataFormat, formatInfo.pixelDataType, freeCallback);
return Result::SUCCESS;
}
namespace ktxreader {
class FAsync : public Async {
public:
FAsync(Texture* texture, Engine& engine, ktx2_transcoder* transcoder, Buffer&& buf) :
mTexture(texture), mEngine(engine), mTranscoder(transcoder),
mSourceBuffer(std::move(buf)) {}
Texture* getTexture() const noexcept { return mTexture; }
Result doTranscoding();
void uploadImages();
private:
using TranscoderResult = std::atomic<Texture::PixelBufferDescriptor*>;
// After each level is transcoded, the results are stashed in the following array until the
// foreground thread calls uploadImages(). Each slot in the array corresponds to a single
// miplevel in the texture.
TranscoderResult mTranscoderResults[KTX2_MAX_SUPPORTED_LEVEL_COUNT] = {};
Texture* const mTexture;
Engine& mEngine;
// We do not share the BasisU trancoder between Async objects. The BasisU transcoder
// allows parallelization at "level" granularity, but does not permit parallelization at
// "texture" granularity. i.e. the transcode_image_level() method is thread-safe but the
// start_transcoding() method is not.
std::unique_ptr<ktx2_transcoder> const mTranscoder;
// Storage for the content of the KTX2 file.
Buffer mSourceBuffer;
};
Ktx2Reader::Ktx2Reader(Engine& engine, bool quiet) :
mEngine(engine),
mQuiet(quiet),
mTranscoder(new ktx2_transcoder()) {
mRequestedFormats.reserve((size_t) transcoder_texture_format::cTFTotalTextureFormats);
basisu_transcoder_init();
}
Ktx2Reader::~Ktx2Reader() {
delete mTranscoder;
}
Result Ktx2Reader::requestFormat(Texture::InternalFormat format) noexcept {
if (!getFinalFormatInfo(format).isSupported) {
return Result::FORMAT_UNSUPPORTED;
}
for (Texture::InternalFormat fmt : mRequestedFormats) {
if (fmt == format) {
return Result::FORMAT_ALREADY_REQUESTED;
}
}
mRequestedFormats.push_back(format);
return Result::SUCCESS;
}
void Ktx2Reader::unrequestFormat(Texture::InternalFormat format) noexcept {
for (auto iter = mRequestedFormats.begin(); iter != mRequestedFormats.end(); ++iter) {
if (*iter == format) {
mRequestedFormats.erase(iter);
return;
}
}
}
Texture* Ktx2Reader::load(const void* data, size_t size, TransferFunction transfer) {
Texture* texture = createTexture(mTranscoder, data, size, transfer);
if (texture == nullptr) {
return nullptr;
}
if (!mTranscoder->start_transcoding()) {
mEngine.destroy(texture);
if (!mQuiet) {
utils::slog.e << "BasisU start_transcoding failed." << utils::io::endl;
}
return nullptr;
}
ktx2_transcoder_state basisThreadState;
basisThreadState.clear();
for (uint32_t levelIndex = 0, n = mTranscoder->get_levels(); levelIndex < n; levelIndex++) {
Texture::PixelBufferDescriptor* pbd;
Result result = transcodeImageLevel(*mTranscoder, basisThreadState, texture->getFormat(),
levelIndex, &pbd);
if (UTILS_UNLIKELY(result != Result::SUCCESS)) {
mEngine.destroy(texture);
if (!mQuiet) {
utils::slog.e << "Failed to transcode level " << levelIndex << utils::io::endl;
}
return nullptr;
}
texture->setImage(mEngine, levelIndex, std::move(*pbd));
}
return texture;
}
Result FAsync::doTranscoding() {
ktx2_transcoder_state basisThreadState;
basisThreadState.clear();
for (uint32_t levelIndex = 0, n = mTranscoder->get_levels(); levelIndex < n; levelIndex++) {
Texture::PixelBufferDescriptor* pbd;
Result result = transcodeImageLevel(*mTranscoder, basisThreadState, mTexture->getFormat(),
levelIndex, &pbd);
if (UTILS_UNLIKELY(result != Result::SUCCESS)) {
return result;
}
mTranscoderResults[levelIndex].store(pbd);
}
return Result::SUCCESS;
}
void FAsync::uploadImages() {
size_t levelIndex = 0;
UTILS_NOUNROLL
for (TranscoderResult& level : mTranscoderResults) {
Texture::PixelBufferDescriptor* pbd = level.load();
if (pbd) {
level.store(nullptr);
mTexture->setImage(mEngine, levelIndex, std::move(*pbd));
delete pbd;
}
++levelIndex;
}
}
Async* Ktx2Reader::asyncCreate(const void* data, size_t size, TransferFunction transfer) {
Buffer ktx2content((uint8_t*)data, (uint8_t*)data + size);
ktx2_transcoder* transcoder = new ktx2_transcoder();
Texture* texture = createTexture(transcoder, ktx2content.data(), ktx2content.size(), transfer);
if (texture == nullptr) {
delete transcoder;
return nullptr;
}
if (!transcoder->start_transcoding()) {
delete transcoder;
mEngine.destroy(texture);
return nullptr;
}
// There's no need to do any further work at this point but it should be noted that this is the
// point at which we first come to know the number of miplevels, dimensions, etc. If we had a
// dynamically sized array to store decoder results, we would reserve it here.
return new FAsync(texture, mEngine, transcoder, std::move(ktx2content));
}
void Ktx2Reader::asyncDestroy(Async** async) {
delete *async;
*async = nullptr;
}
Texture* Ktx2Reader::createTexture(ktx2_transcoder* transcoder, const void* data, size_t size,
TransferFunction transfer) {
if (!transcoder->init(data, size)) {
if (!mQuiet) {
utils::slog.e << "BasisU transcoder init failed." << utils::io::endl;
}
return nullptr;
}
if (transcoder->get_dfd_transfer_func() == KTX2_KHR_DF_TRANSFER_LINEAR &&
transfer == TransferFunction::sRGB) {
if (!mQuiet) {
utils::slog.e << "Source texture is marked linear, but client is requesting sRGB."
<< utils::io::endl;
}
return nullptr;
}
if (transcoder->get_dfd_transfer_func() == KTX2_KHR_DF_TRANSFER_SRGB &&
transfer == TransferFunction::LINEAR) {
if (!mQuiet) {
utils::slog.e << "Source texture is marked sRGB, but client is requesting linear."
<< utils::io::endl;
}
return nullptr;
}
// TODO: support cubemaps. For now we use KTX1 for cubemaps because basisu does not support HDR.
if (transcoder->get_faces() == 6) {
if (!mQuiet) {
utils::slog.e << "Cubemaps are not yet supported." << utils::io::endl;
}
return nullptr;
}
// TODO: support texture arrays.
if (transcoder->get_layers() > 1) {
if (!mQuiet) {
utils::slog.e << "Texture arrays are not yet supported." << utils::io::endl;
}
return nullptr;
}
// First pass through, just to make sure we can transcode it.
bool found = false;
Texture::InternalFormat resolvedFormat;
FinalFormatInfo info;
for (Texture::InternalFormat requestedFormat : mRequestedFormats) {
if (!Texture::isTextureFormatSupported(mEngine, requestedFormat)) {
continue;
}
info = getFinalFormatInfo(requestedFormat);
if (!info.isSupported || info.transferFunction != transfer) {
continue;
}
if (!basis_is_format_supported(info.basisFormat, transcoder->get_format())) {
continue;
}
const uint32_t layerIndex = 0;
const uint32_t faceIndex = 0;
for (uint32_t levelIndex = 0; levelIndex < transcoder->get_levels(); levelIndex++) {
basist::ktx2_image_level_info info;
if (!transcoder->get_image_level_info(info, levelIndex, layerIndex, faceIndex)) {
continue;
}
}
found = true;
resolvedFormat = requestedFormat;
break;
}
if (!found) {
if (!mQuiet) {
utils::slog.e << "Unable to decode any of the requested formats." << utils::io::endl;
}
return nullptr;
}
Texture* texture = Texture::Builder()
.width(transcoder->get_width())
.height(transcoder->get_height())
.levels(transcoder->get_levels())
.sampler(Texture::Sampler::SAMPLER_2D)
.format(resolvedFormat)
.build(mEngine);
if (texture == nullptr && !mQuiet) {
utils::slog.e << "Unable to construct texture using BasisU info." << utils::io::endl;
}
#if BASISU_FORCE_DEVEL_MESSAGES
utils::slog.e << "Ktx2Reader created "
<< transcoder->get_width() << "x" << transcoder->get_height() << " texture with format "
<< info.name << utils::io::endl;
#endif
return texture;
}
Texture* Async::getTexture() const noexcept {
return static_cast<FAsync const*>(this)->getTexture();
}
Result Async::doTranscoding() {
return static_cast<FAsync*>(this)->doTranscoding();
}
void Async::uploadImages() {
return static_cast<FAsync*>(this)->uploadImages();
}
} // namespace ktxreader