Revert "Add a Vulkan feature to compress float32 vertex formats."

include/platform/FeaturesVk.h

@@ -449,14 +449,6 @@ struct FeaturesVk : FeatureSetBase
                                         FeatureCategory::VulkanWorkarounds,
                                         "Force nearest mip filtering when sampling.", &members};
 
-    // Compress float32 vertices in static buffers to float16 at draw time. ANGLE is non-conformant
-    // if this feature is enabled.
-    angle::Feature compressVertexData = {"compress_vertex_data",
-                                         angle::FeatureCategory::VulkanWorkarounds,
-                                         "Compress vertex data to smaller data types when "
-                                         "possible. Using this feature makes ANGLE non-conformant.",
-                                         &members};
-
     // Qualcomm missynchronizes vkCmdClearAttachments in the middle of render pass.
     // https://issuetracker.google.com/166809097
     Feature preferDrawClearOverVkCmdClearAttachments = {

src/libANGLE/renderer/vulkan/RendererVk.cpp

@@ -1998,8 +1998,6 @@ void RendererVk::initFeatures(DisplayVk *displayVk, const ExtensionNameList &dev
     ANGLE_FEATURE_CONDITION(&mFeatures, forceNearestFiltering, false);
     ANGLE_FEATURE_CONDITION(&mFeatures, forceNearestMipFiltering, false);
 
-    ANGLE_FEATURE_CONDITION(&mFeatures, compressVertexData, false);
-
     ANGLE_FEATURE_CONDITION(
         &mFeatures, preferDrawClearOverVkCmdClearAttachments,
         IsPixel2(mPhysicalDeviceProperties.vendorID, mPhysicalDeviceProperties.deviceID));

src/libANGLE/renderer/vulkan/VertexArrayVk.cpp

@@ -579,14 +579,6 @@ angle::Result VertexArrayVk::syncDirtyAttrib(ContextVk *contextVk,
             bool bindingIsAligned               = BindingIsAligned(
                 binding, intendedFormat, intendedFormat.channelCount, attrib.relativeOffset);
 
-            if (renderer->getFeatures().compressVertexData.enabled &&
-                gl::IsStaticBufferUsage(bufferGL->getUsage()) &&
-                vertexFormat.actualCompressedBufferFormatID != angle::FormatID::NONE &&
-                vertexFormat.actualBufferFormatID != vertexFormat.actualCompressedBufferFormatID)
-            {
-                compressed = true;
-            }
-
             if (vertexFormat.getVertexLoadRequiresConversion(compressed) || !bindingIsAligned)
             {
                 ConversionBuffer *conversion = bufferVk->getVertexConversionBuffer(
@@ -594,13 +586,6 @@ angle::Result VertexArrayVk::syncDirtyAttrib(ContextVk *contextVk,
                     binding.getOffset() + attrib.relativeOffset, !bindingIsAligned);
                 if (conversion->dirty)
                 {
-                    if (compressed)
-                    {
-                        INFO() << "Compressing vertex data in buffer " << bufferGL->id().value
-                               << " from " << vertexFormat.vkBufferFormat << " to "
-                               << vertexFormat.vkCompressedBufferFormat << ".";
-                    }
-
                     if (bindingIsAligned)
                     {
                         ANGLE_TRY(convertVertexBufferGPU(contextVk, bufferVk, binding, attribIndex,

src/libANGLE/renderer/vulkan/vk_format_utils.cpp

@@ -167,7 +167,7 @@ void Format::initBufferFallback(RendererVk *renderer,
         vertexLoadRequiresConversion = info[i].vertexLoadRequiresConversion;
     }
 
-    if (renderer->getFeatures().compressVertexData.enabled && compressedStartIndex < numInfo)
+    if (compressedStartIndex < numInfo)
     {
         int i = FindSupportedFormat(renderer, info, compressedStartIndex, numInfo,
                                     HasFullBufferFormatSupport);