Add support for GL_CHROMIUM_texture_filtering

include/GLES2/gl2ext_angle.h

@@ -510,6 +510,11 @@ GL_APICALL void GL_APIENTRY glImportSemaphoreZirconHandleANGLE(GLuint memory,
 #endif
 #endif /* GL_ANGLE_semaphore_fuchsia */
 
+#ifndef GL_CHROMIUM_texture_filtering_hint
+#define GL_CHROMIUM_texture_filtering_hint
+#define GL_TEXTURE_FILTERING_HINT_CHROMIUM 0x8AF0
+#endif /* GL_CHROMIUM_texture_filtering_hint */
+
 // clang-format on
 
 #endif  // INCLUDE_GLES2_GL2EXT_ANGLE_H_

include/platform/FeaturesVk.h

@@ -120,6 +120,10 @@ struct FeaturesVk : FeatureSetBase
         "supports_external_memory_fuchsia", FeatureCategory::VulkanFeatures,
         "VkDevice supports the VK_FUCHSIA_external_memory extension", &members};
 
+    angle::Feature supportsFilteringPrecision = {
+        "supports_filtering_precision_google", FeatureCategory::VulkanFeatures,
+        "VkDevice supports the VK_GOOGLE_sampler_filtering_precision extension", &members};
+
     // Whether the VkDevice supports the VK_KHR_external_fence_capabilities extension.
     Feature supportsExternalFenceCapabilities = {
         "supports_external_fence_capabilities", FeatureCategory::VulkanFeatures,

src/libANGLE/Caps.cpp

@@ -1004,6 +1004,7 @@ const ExtensionInfoMap &GetExtensionInfoMap()
         map["GL_ANGLE_texture_multisample"] = enableableExtension(&Extensions::textureMultisample);
         map["GL_ANGLE_multi_draw"] = enableableExtension(&Extensions::multiDraw);
         map["GL_ANGLE_provoking_vertex"] = enableableExtension(&Extensions::provokingVertex);
+        map["GL_CHROMIUM_texture_filtering_hint"] = enableableExtension(&Extensions::textureFilteringCHROMIUM);
         map["GL_CHROMIUM_lose_context"] = enableableExtension(&Extensions::loseContextCHROMIUM);
         map["GL_ANGLE_texture_external_update"] = enableableExtension(&Extensions::textureExternalUpdateANGLE);
         map["GL_ANGLE_base_vertex_base_instance"] = enableableExtension(&Extensions::baseVertexBaseInstance);

src/libANGLE/Caps.h

@@ -585,6 +585,9 @@ struct Extensions
     // GL_ANGLE_provoking_vertex
     bool provokingVertex = false;
 
+    // GL_CHROMIUM_texture_filtering_hint
+    bool textureFilteringCHROMIUM = false;
+
     // GL_CHROMIUM_lose_context
     bool loseContextCHROMIUM = false;
 

src/libANGLE/Context.cpp

@@ -4782,6 +4782,9 @@ void Context::hint(GLenum target, GLenum mode)
         case GL_FOG_HINT:
             mState.gles1().setHint(target, mode);
             break;
+        case GL_TEXTURE_FILTERING_HINT_CHROMIUM:
+            mState.setTextureFilteringHint(mode);
+            break;
         default:
             UNREACHABLE();
             return;

src/libANGLE/State.cpp

@@ -352,6 +352,7 @@ State::State(const State *shareContextState,
       mStencilBackRef(0),
       mLineWidth(0),
       mGenerateMipmapHint(GL_NONE),
+      mTextureFilteringHint(GL_NONE),
       mFragmentShaderDerivativeHint(GL_NONE),
       mBindGeneratesResource(bindGeneratesResource),
       mClientArraysEnabled(clientArraysEnabled),
@@ -419,6 +420,7 @@ void State::initialize(Context *context)
     mSampleMaskValues.fill(~GLbitfield(0));
 
     mGenerateMipmapHint           = GL_DONT_CARE;
+    mTextureFilteringHint         = GL_DONT_CARE;
     mFragmentShaderDerivativeHint = GL_DONT_CARE;
 
     mLineWidth = 1.0f;
@@ -1428,6 +1430,18 @@ void State::setGenerateMipmapHint(GLenum hint)
     mDirtyBits.set(DIRTY_BIT_EXTENDED);
 }
 
+void State::setTextureFilteringHint(GLenum hint)
+{
+    mTextureFilteringHint = hint;
+    // Note: we don't add a dirty bit for this flag as it's not expected to be toggled at
+    // runtime.
+}
+
+GLenum State::getTextureFilteringHint() const
+{
+    return mTextureFilteringHint;
+}
+
 void State::setFragmentShaderDerivativeHint(GLenum hint)
 {
     mFragmentShaderDerivativeHint = hint;
@@ -2477,6 +2491,9 @@ angle::Result State::getIntegerv(const Context *context, GLenum pname, GLint *pa
         case GL_GENERATE_MIPMAP_HINT:
             *params = mGenerateMipmapHint;
             break;
+        case GL_TEXTURE_FILTERING_HINT_CHROMIUM:
+            *params = mTextureFilteringHint;
+            break;
         case GL_FRAGMENT_SHADER_DERIVATIVE_HINT_OES:
             *params = mFragmentShaderDerivativeHint;
             break;

src/libANGLE/State.h

@@ -255,6 +255,8 @@ class State : angle::NonCopyable
 
     // Hint setters
     void setGenerateMipmapHint(GLenum hint);
+    void setTextureFilteringHint(GLenum hint);
+    GLenum getTextureFilteringHint() const;
     void setFragmentShaderDerivativeHint(GLenum hint);
 
     // GL_CHROMIUM_bind_generates_resource
@@ -895,6 +897,7 @@ class State : angle::NonCopyable
     GLfloat mLineWidth;
 
     GLenum mGenerateMipmapHint;
+    GLenum mTextureFilteringHint;
     GLenum mFragmentShaderDerivativeHint;
 
     const bool mBindGeneratesResource;

src/libANGLE/queryutils.cpp

@@ -2973,6 +2973,7 @@ bool GetQueryParameterInfo(const State &glState,
         case GL_PACK_ALIGNMENT:
         case GL_UNPACK_ALIGNMENT:
         case GL_GENERATE_MIPMAP_HINT:
+        case GL_TEXTURE_FILTERING_HINT_CHROMIUM:
         case GL_RED_BITS:
         case GL_GREEN_BITS:
         case GL_BLUE_BITS:

src/libANGLE/renderer/vulkan/BUILD.gn

@@ -87,6 +87,7 @@ _vulkan_backend_sources = [
   "vk_format_table_autogen.cpp",
   "vk_format_utils.cpp",
   "vk_format_utils.h",
+  "vk_google_filtering_precision.h",
   "vk_helpers.cpp",
   "vk_helpers.h",
   "vk_internal_shaders_autogen.cpp",

src/libANGLE/renderer/vulkan/RendererVk.cpp

@@ -32,6 +32,7 @@
 #include "libANGLE/renderer/vulkan/VertexArrayVk.h"
 #include "libANGLE/renderer/vulkan/vk_caps_utils.h"
 #include "libANGLE/renderer/vulkan/vk_format_utils.h"
+#include "libANGLE/renderer/vulkan/vk_google_filtering_precision.h"
 #include "libANGLE/trace.h"
 #include "platform/Platform.h"
 
@@ -701,6 +702,17 @@ angle::Result RendererVk::initialize(DisplayVk *displayVk,
         enabledInstanceExtensions.empty() ? nullptr : enabledInstanceExtensions.data();
     instanceInfo.enabledLayerCount   = static_cast<uint32_t>(enabledInstanceLayerNames.size());
     instanceInfo.ppEnabledLayerNames = enabledInstanceLayerNames.data();
+
+    // Disable certain validation features, specifically:
+    // * Unique handles so that 'pNext' isn't cleared for pre-release or custom extensions
+    VkValidationFeatureDisableEXT disabledFeatures[] = {
+        VK_VALIDATION_FEATURE_DISABLE_UNIQUE_HANDLES_EXT};
+    VkValidationFeaturesEXT validationFeatures        = {};
+    validationFeatures.sType                          = VK_STRUCTURE_TYPE_VALIDATION_FEATURES_EXT;
+    validationFeatures.disabledValidationFeatureCount = 1;
+    validationFeatures.pDisabledValidationFeatures    = disabledFeatures;
+    vk::AddToPNextChain(&instanceInfo, &validationFeatures);
+
     ANGLE_VK_TRY(displayVk, vkCreateInstance(&instanceInfo, nullptr, &mInstance));
 #if defined(ANGLE_SHARED_LIBVULKAN)
     // Load volk if we are linking dynamically
@@ -1594,6 +1606,10 @@ void RendererVk::initFeatures(DisplayVk *displayVk, const ExtensionNameList &dev
         ExtensionFound(VK_FUCHSIA_EXTERNAL_MEMORY_EXTENSION_NAME, deviceExtensionNames));
 
     ANGLE_FEATURE_CONDITION(
+        &mFeatures, supportsFilteringPrecision,
+        ExtensionFound(VK_GOOGLE_SAMPLER_FILTERING_PRECISION_EXTENSION_NAME, deviceExtensionNames));
+
+    ANGLE_FEATURE_CONDITION(
         &mFeatures, supportsExternalFenceCapabilities,
         ExtensionFound(VK_KHR_EXTERNAL_FENCE_CAPABILITIES_EXTENSION_NAME, deviceExtensionNames));
 

src/libANGLE/renderer/vulkan/vk_cache_utils.cpp

@@ -18,6 +18,7 @@
 #include "libANGLE/renderer/vulkan/RendererVk.h"
 #include "libANGLE/renderer/vulkan/VertexArrayVk.h"
 #include "libANGLE/renderer/vulkan/vk_format_utils.h"
+#include "libANGLE/renderer/vulkan/vk_google_filtering_precision.h"
 #include "libANGLE/renderer/vulkan/vk_helpers.h"
 
 #include <type_traits>
@@ -1774,7 +1775,7 @@ void SamplerDesc::update(const gl::SamplerState &samplerState, bool stencilMode)
     mReserved = 0;
 }
 
-VkSamplerCreateInfo SamplerDesc::unpack(ContextVk *contextVk) const
+angle::Result SamplerDesc::init(ContextVk *contextVk, vk::Sampler *sampler) const
 {
     const gl::Extensions &extensions = contextVk->getExtensions();
 
@@ -1799,7 +1800,23 @@ VkSamplerCreateInfo SamplerDesc::unpack(ContextVk *contextVk) const
     createInfo.borderColor             = VK_BORDER_COLOR_INT_TRANSPARENT_BLACK;
     createInfo.unnormalizedCoordinates = VK_FALSE;
 
-    return createInfo;
+    // Note: because we don't detect changes to this hint (no dirty bit), if a sampler is created
+    // with the hint enabled, and then the hint gets disabled, the next render will do so with the
+    // hint enabled.
+    VkSamplerFilteringPrecisionGOOGLE filteringInfo = {};
+    GLenum hint = contextVk->getState().getTextureFilteringHint();
+    if (hint == GL_NICEST)
+    {
+        ASSERT(extensions.textureFilteringCHROMIUM);
+        filteringInfo.sType = VK_STRUCTURE_TYPE_SAMPLER_FILTERING_PRECISION_GOOGLE;
+        filteringInfo.samplerFilteringPrecisionMode =
+            VK_SAMPLER_FILTERING_PRECISION_MODE_HIGH_GOOGLE;
+        vk::AddToPNextChain(&createInfo, &filteringInfo);
+    }
+
+    ANGLE_VK_TRY(contextVk, sampler->init(contextVk->getDevice(), createInfo));
+
+    return angle::Result::Continue;
 }
 
 size_t SamplerDesc::hash() const
@@ -2158,10 +2175,8 @@ angle::Result SamplerCache::getSampler(ContextVk *contextVk,
         return angle::Result::Continue;
     }
 
-    VkSamplerCreateInfo createInfo = desc.unpack(contextVk);
-
     vk::Sampler sampler;
-    ANGLE_VK_TRY(contextVk, sampler.init(contextVk->getDevice(), createInfo));
+    ANGLE_TRY(desc.init(contextVk, &sampler));
 
     auto insertedItem = mPayload.emplace(desc, vk::RefCountedSampler(std::move(sampler)));
     vk::RefCountedSampler &insertedSampler = insertedItem.first->second;

src/libANGLE/renderer/vulkan/vk_cache_utils.h

@@ -609,7 +609,7 @@ class SamplerDesc final
 
     void update(const gl::SamplerState &samplerState, bool stencilMode);
     void reset();
-    VkSamplerCreateInfo unpack(ContextVk *contextVk) const;
+    angle::Result init(ContextVk *contextVk, vk::Sampler *sampler) const;
 
     size_t hash() const;
     bool operator==(const SamplerDesc &other) const;

src/libANGLE/renderer/vulkan/vk_caps_utils.cpp

@@ -183,6 +183,8 @@ void RendererVk::ensureCapsInitialized() const
 
     mNativeExtensions.gpuShader5EXT = vk::CanSupportGPUShader5EXT(mPhysicalDeviceFeatures);
 
+    mNativeExtensions.textureFilteringCHROMIUM = getFeatures().supportsFilteringPrecision.enabled;
+
     // https://vulkan.lunarg.com/doc/view/1.0.30.0/linux/vkspec.chunked/ch31s02.html
     mNativeCaps.maxElementIndex  = std::numeric_limits<GLuint>::max() - 1;
     mNativeCaps.max3DTextureSize = LimitToInt(limitsVk.maxImageDimension3D);

src/libANGLE/renderer/vulkan/vk_google_filtering_precision.h

+// Copyright 2020 The SwiftShader Authors. All Rights Reserved.
+//
+// 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 "libANGLE/renderer/vulkan/vk_headers.h"
+
+// THIS FILE SHOULD BE DELETED IF VK_GOOGLE_sampler_filtering_precision IS EVER ADDED TO THE VULKAN
+// HEADERS
+#ifdef VK_GOOGLE_sampler_filtering_precision
+#    error \
+        "VK_GOOGLE_sampler_filtering_precision is already defined in the Vulkan headers, you can delete this file"
+#endif
+
+static constexpr VkStructureType VK_STRUCTURE_TYPE_SAMPLER_FILTERING_PRECISION_GOOGLE =
+    static_cast<VkStructureType>(1000264000);
+
+#define VK_GOOGLE_sampler_filtering_precisions 1
+#define VK_GOOGLE_SAMPLER_FILTERING_PRECISION_SPEC_VERSION 1
+#define VK_GOOGLE_SAMPLER_FILTERING_PRECISION_EXTENSION_NAME "VK_GOOGLE_sampler_filtering_precision"
+
+const int TEXTURE_FILTERING_HINT_CHROMIUM = 0x8AF0;
+
+typedef enum VkSamplerFilteringPrecisionModeGOOGLE
+{
+    VK_SAMPLER_FILTERING_PRECISION_MODE_LOW_GOOGLE  = 0,
+    VK_SAMPLER_FILTERING_PRECISION_MODE_HIGH_GOOGLE = 1,
+    VK_SAMPLER_FILTERING_PRECISION_MODE_BEGIN_RANGE_GOOGLE =
+        VK_SAMPLER_FILTERING_PRECISION_MODE_LOW_GOOGLE,
+    VK_SAMPLER_FILTERING_PRECISION_MODE_END_RANGE_GOOGLE =
+        VK_SAMPLER_FILTERING_PRECISION_MODE_HIGH_GOOGLE,
+    VK_SAMPLER_FILTERING_PRECISION_MODE_RANGE_SIZE_GOOGLE =
+        (VK_SAMPLER_FILTERING_PRECISION_MODE_HIGH_GOOGLE -
+         VK_SAMPLER_FILTERING_PRECISION_MODE_LOW_GOOGLE + 1),
+    VK_SAMPLER_FILTERING_PRECISION_MODE_MAX_ENUM_GOOGLE = 0x7FFFFFFF
+} VkSamplerFilteringPrecisionModeGOOGLE;
+
+typedef struct VkSamplerFilteringPrecisionGOOGLE
+{
+    VkStructureType sType;
+    const void *pNext;
+    VkSamplerFilteringPrecisionModeGOOGLE samplerFilteringPrecisionMode;
+} VkSamplerFilteringPrecisionGOOGLE;

src/libANGLE/validationES2.cpp

@@ -5059,6 +5059,14 @@ bool ValidateHint(const Context *context, GLenum target, GLenum mode)
         case GL_GENERATE_MIPMAP_HINT:
             break;
 
+        case GL_TEXTURE_FILTERING_HINT_CHROMIUM:
+            if (!context->getExtensions().textureFilteringCHROMIUM)
+            {
+                context->validationError(GL_INVALID_ENUM, kEnumNotSupported);
+                return false;
+            }
+            break;
+
         case GL_FRAGMENT_SHADER_DERIVATIVE_HINT:
             if (context->getClientVersion() < ES_3_0 &&
                 !context->getExtensions().standardDerivativesOES)

src/tests/angle_end2end_tests.gni

@@ -118,6 +118,7 @@ angle_end2end_tests_sources = [
   "gl_tests/SwizzleTest.cpp",
   "gl_tests/SyncQueriesTest.cpp",
   "gl_tests/TextureExternalUpdateTest.cpp",
+  "gl_tests/TextureFilteringHintTest.cpp",
   "gl_tests/TextureMultisampleTest.cpp",
   "gl_tests/TextureRectangleTest.cpp",
   "gl_tests/TextureTest.cpp",

src/tests/gl_tests/TextureFilteringHintTest.cpp

+//
+// Copyright 2020 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// TextureFilteringHintTest.cpp : Tests of the GL_CHROMIUM_texture_filtering_hint extension.
+
+#include "test_utils/ANGLETest.h"
+
+#include "test_utils/gl_raii.h"
+
+namespace angle
+{
+
+class TextureFilteringHintTest : public ANGLETest
+{
+  protected:
+    TextureFilteringHintTest()
+    {
+        setWindowWidth(128);
+        setWindowHeight(128);
+        setConfigRedBits(8);
+        setConfigGreenBits(8);
+        setConfigBlueBits(8);
+        setConfigAlphaBits(8);
+    }
+};
+
+// Test that setting the hint works only when the extension is enabled
+TEST_P(TextureFilteringHintTest, Validation)
+{
+    if (IsGLExtensionEnabled("GL_CHROMIUM_texture_filtering_hint"))
+    {
+        GLint intValue = 0;
+        glGetIntegerv(GL_TEXTURE_FILTERING_HINT_CHROMIUM, &intValue);
+        EXPECT_GL_NO_ERROR();
+        EXPECT_GLENUM_EQ(GL_DONT_CARE, intValue);
+
+        glHint(GL_TEXTURE_FILTERING_HINT_CHROMIUM, GL_FASTEST);
+        glGetIntegerv(GL_TEXTURE_FILTERING_HINT_CHROMIUM, &intValue);
+        EXPECT_GL_NO_ERROR();
+        EXPECT_GLENUM_EQ(GL_FASTEST, intValue);
+
+        glHint(GL_TEXTURE_FILTERING_HINT_CHROMIUM, GL_NICEST);
+        glGetIntegerv(GL_TEXTURE_FILTERING_HINT_CHROMIUM, &intValue);
+        EXPECT_GL_NO_ERROR();
+        EXPECT_GLENUM_EQ(GL_NICEST, intValue);
+
+        glHint(GL_TEXTURE_FILTERING_HINT_CHROMIUM, GL_TEXTURE_2D);
+        glGetIntegerv(GL_TEXTURE_FILTERING_HINT_CHROMIUM, &intValue);
+        EXPECT_GL_ERROR(GL_INVALID_ENUM);
+    }
+    else
+    {
+        glHint(GL_TEXTURE_FILTERING_HINT_CHROMIUM, GL_FASTEST);
+        EXPECT_GL_ERROR(GL_INVALID_ENUM);
+    }
+}
+
+// Use this to select which configurations (e.g. which renderer, which GLES major version) these
+// tests should be run against.
+ANGLE_INSTANTIATE_TEST_ES2_AND_ES3(TextureFilteringHintTest);
+}  // namespace angle