message: Vulkan: ReadPixels y-flip workaround.
diff: @@ -1436,15 +1436,8 @@ void VulkanDriver::readPixels(Handle<HwRenderTarget> src, uint32_t x, uint32_t y
  vkMapMemory(device, stagingMemory, 0, VK_WHOLE_SIZE, 0, (void**) &srcPixels);
  srcPixels += subResourceLayout.offset;
  - // TODO: investigate why this Y-flip conditional exists. At least two SwiftShader-based
  - // tests (viewer_basic_test.cc and gltf_viewer batch mode) seem to require "false". However
  - // test_ReadPixels.cpp with MoltenVK requires "true" to be consistent with OpenGL and Metal.
  - // One hypothesis is that this is due to the layout of the SwiftShader backbuffer.
  - #ifdef FILAMENT_USE_SWIFTSHADER
  - constexpr bool flipY = false;
  - #else
  + // TODO: investigate why this Y-flip exists.
  constexpr bool flipY = true;
  - #endif
  if (!DataReshaper::reshapeImage(closure, getComponentType(srcFormat), srcPixels,
  subResourceLayout.rowPitch, width, height, swizzle, flipY)) {
  utils::slog.e << "Unsupported PixelDataFormat or PixelDataType" << utils::io::endl;
  