Disable gltfio mipmapping

filament/backend/test/test_ReadPixels.cpp

@@ -139,30 +139,6 @@ TEST_F(ReadPixelsTest, ReadPixels) {
             return bufferDimension;
         }
 
-        void exportScreenshot(void* pixelData) const {
-#ifndef FILAMENT_IOS
-            const size_t width = readRect.width, height = readRect.height;
-            LinearImage image(width, height, 4);
-            if (format == PixelDataFormat::RGBA && type == PixelDataType::UBYTE) {
-                image = toLinearWithAlpha<uint8_t>(width, height, width * 4, (uint8_t*)pixelData);
-            }
-            if (format == PixelDataFormat::RGBA && type == PixelDataType::FLOAT) {
-                memcpy(image.getPixelRef(), pixelData, width * height * sizeof(math::float4));
-            }
-            std::string png = std::string(testName) + ".png";
-            std::ofstream outputStream(png.c_str(), std::ios::binary | std::ios::trunc);
-            ImageEncoder::encode(outputStream, ImageEncoder::Format::PNG, image, "",
-                    png.c_str());
-#endif
-        }
-
-        void exportRawBytes(void* pixelData) const {
-            std::string out = std::string(testName) + ".raw";
-            std::ofstream outputStream(out.c_str(), std::ios::binary | std::ios::trunc);
-            outputStream.write((char*)pixelData, getBufferSizeBytes());
-            outputStream.close();
-        }
-
         // The format and type for the readPixels call.
         PixelDataFormat format = PixelDataFormat::RGBA;
         PixelDataType type = PixelDataType::UBYTE;
@@ -335,9 +311,6 @@ TEST_F(ReadPixelsTest, ReadPixels) {
                     const auto* test = (const TestCase*)user;
                     assert_invariant(test);
 
-                    test->exportScreenshot(buffer);
-                    //test->exportRawBytes(buffer);
-
                     // Hash the contents of the buffer and check that they match.
                     uint32_t hash = utils::hash::murmur3((const uint32_t*)buffer, size / 4, 0);
 

libs/gltfio/src/StbProvider.cpp

@@ -99,7 +99,7 @@ Texture* StbProvider::pushTexture(const uint8_t* data, size_t byteCount,
     Texture* texture = Texture::Builder()
             .width(width)
             .height(height)
-            .levels(0xff)
+            .levels(1)
             .format(any(flags & TextureFlags::sRGB) ? InternalFormat::SRGB8_A8 : InternalFormat::RGBA8)
             .build(*mEngine);
 
@@ -190,7 +190,7 @@ void StbProvider::updateQueue() {
 
             // Call generateMipmaps unconditionally to fulfill the promise of the TextureProvider
             // interface. Providers of hierarchical images (e.g. KTX) call this only if needed.
-            texture->generateMipmaps(*mEngine);
+            // texture->generateMipmaps(*mEngine);
 
             info->state = TextureState::READY;
             ++mDecodedCount;

libs/ktxreader/src/Ktx1Reader.cpp

@@ -27,7 +27,7 @@ Texture* createTexture(Engine* engine, const Ktx1Bundle& ktx, bool srgb,
         Callback callback, void* userdata) {
     using Sampler = Texture::Sampler;
     const auto& ktxinfo = ktx.getInfo();
-    const uint32_t nmips = ktx.getNumMipLevels();
+    const uint32_t nmips = /* ktx.getNumMipLevels() */ 1;
     const auto cdatatype = toCompressedPixelDataType(ktxinfo);
     const auto datatype = toPixelDataType(ktxinfo);
     const auto dataformat = toPixelDataFormat(ktxinfo);

libs/ktxreader/src/Ktx2Reader.cpp

@@ -247,7 +247,7 @@ Texture* Ktx2Reader::load(const void* data, size_t size, TransferFunction transf
     ktx2_transcoder_state basisThreadState;
     basisThreadState.clear();
 
-    for (uint32_t levelIndex = 0, n = mTranscoder->get_levels(); levelIndex < n; levelIndex++) {
+    for (uint32_t levelIndex = 0, n = 1 /*mTranscoder->get_levels()*/; levelIndex < n; levelIndex++) {
         Texture::PixelBufferDescriptor* pbd;
         Result result = transcodeImageLevel(*mTranscoder, basisThreadState, texture->getFormat(),
                 levelIndex, &pbd);
@@ -275,7 +275,7 @@ FAsync::~FAsync() {
 Result FAsync::doTranscoding() {
     ktx2_transcoder_state basisThreadState;
     basisThreadState.clear();
-    for (uint32_t levelIndex = 0, n = mTranscoder->get_levels(); levelIndex < n; levelIndex++) {
+    for (uint32_t levelIndex = 0, n = 1 /*mTranscoder->get_levels()*/; levelIndex < n; levelIndex++) {
         Texture::PixelBufferDescriptor* pbd;
         Result result = transcodeImageLevel(*mTranscoder, basisThreadState, mTexture->getFormat(),
                 levelIndex, &pbd);
@@ -385,7 +385,7 @@ Texture* Ktx2Reader::createTexture(ktx2_transcoder* transcoder, const void* data
         }
         const uint32_t layerIndex = 0;
         const uint32_t faceIndex = 0;
-        for (uint32_t levelIndex = 0; levelIndex < transcoder->get_levels(); levelIndex++) {
+        for (uint32_t levelIndex = 0; levelIndex < 1 /*transcoder->get_levels()*/; levelIndex++) {
             basist::ktx2_image_level_info info;
             if (!transcoder->get_image_level_info(info, levelIndex, layerIndex, faceIndex)) {
                 continue;
@@ -406,7 +406,7 @@ Texture* Ktx2Reader::createTexture(ktx2_transcoder* transcoder, const void* data
     Texture* texture = Texture::Builder()
         .width(transcoder->get_width())
         .height(transcoder->get_height())
-        .levels(transcoder->get_levels())
+        .levels(1)
         .sampler(Texture::Sampler::SAMPLER_2D)
         .format(resolvedFormat)
         .build(mEngine);