Dawn change to enable writeBuffer for size != multiple of 4

Co-authored-by: Andy Hovingh <6198728+AndyHovingh@users.noreply.github.com>

NEW_RELEASE_NOTES.md

@@ -7,5 +7,3 @@ for next branch cut* header.
 appropriate header in [RELEASE_NOTES.md](./RELEASE_NOTES.md).
 
 ## Release notes for next branch cut
-
-- materials: remove dependence on per-view descset layout from filamat. [⚠️ **New Material Version**]

filament/backend/include/backend/DriverEnums.h

@@ -30,7 +30,6 @@
 #include <utils/compiler.h>
 #include <utils/debug.h>
 #include <utils/ostream.h>
-#include <utils/StaticString.h>
 
 #include <math/vec4.h>
 
@@ -40,6 +39,7 @@
 
 #include <stddef.h>
 #include <stdint.h>
+#include <utils/StaticString.h>
 
 /**
  * Types and enums used by filament's driver.

filament/backend/include/backend/Program.h

@@ -44,8 +44,8 @@ public:
 
     struct Descriptor {
         utils::CString name;
-        DescriptorType type;
-        descriptor_binding_t binding;
+        backend::DescriptorType type;
+        backend::descriptor_binding_t binding;
     };
 
     struct SpecializationConstant {

filament/backend/src/CommandStream.cpp

@@ -84,7 +84,7 @@ void CommandStream::execute(void* buffer) {
 
     Profiler profiler;
 
-    if (SYSTRACE_TAG) {
+    if constexpr (SYSTRACE_TAG) {
         if (UTILS_UNLIKELY(mUsePerformanceCounter)) {
             // we want to remove all this when tracing is completely disabled
             profiler.resetEvents(Profiler::EV_CPU_CYCLES  | Profiler::EV_BPU_MISSES);
@@ -100,7 +100,7 @@ void CommandStream::execute(void* buffer) {
         }
     });
 
-    if (SYSTRACE_TAG) {
+    if constexpr (SYSTRACE_TAG) {
         if (UTILS_UNLIKELY(mUsePerformanceCounter)) {
             // we want to remove all this when tracing is completely disabled
             profiler.stop();

filament/backend/src/metal/MetalEnums.h

@@ -185,7 +185,6 @@ inline MTLPixelFormat getMetalFormat(PixelDataFormat format, PixelDataType type)
     CONVERT(RGBA_INTEGER, UINT, RGBA32Uint);
     CONVERT(RGBA_INTEGER, INT, RGBA32Sint);
     CONVERT(RGBA, FLOAT, RGBA32Float);
-    CONVERT(DEPTH_COMPONENT, FLOAT, Depth32Float);
     #undef CONVERT
 
     return MTLPixelFormatInvalid;

filament/backend/src/vulkan/VulkanConstants.h

@@ -152,12 +152,12 @@ static_assert(FVK_ENABLED(FVK_DEBUG_VALIDATION));
 #elif FVK_ENABLED(FVK_DEBUG_SYSTRACE)
 
     #include <utils/Systrace.h>
-    
+
     #define FVK_SYSTRACE_CONTEXT()      SYSTRACE_CONTEXT()
     #define FVK_SYSTRACE_START(marker)  SYSTRACE_NAME_BEGIN(marker)
     #define FVK_SYSTRACE_END()          SYSTRACE_NAME_END()
-    #define FVK_SYSTRACE_SCOPE()        SYSTRACE_NAME(__func__)
-    #define FVK_PROFILE_MARKER(marker)  FVK_SYSTRACE_SCOPE()
+    #define FVK_SYSTRACE_SCOPE()        SYSTRACE_CALL()
+    #define FVK_PROFILE_MARKER(marker)  SYSTRACE_CALL()
 
 #else
     #define FVK_SYSTRACE_CONTEXT()

filament/backend/src/webgpu/WebGPUDriver.cpp

@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-#include <utils/Hash.h>
+
 #include "webgpu/WebGPUDriver.h"
 
 #include "WebGPUPipelineCreation.h"
@@ -916,14 +916,6 @@ void WebGPUDriver::blit(
 }
 
 void WebGPUDriver::bindPipeline(PipelineState const& pipelineState) {
-    // TODO Investigate implications of this hash more closely. Vulkan has a whole class
-    // VulkanPipelineCache to handle this, may be missing nuance
-    static auto pipleineStateHasher = utils::hash::MurmurHashFn<filament::backend::PipelineState>();
-    auto hash = pipleineStateHasher(pipelineState);
-    if(mPipelineMap.find(hash) != mPipelineMap.end()){
-        mRenderPassEncoder.SetPipeline(mPipelineMap[hash]);
-        return;
-    }
     const auto* program = handleCast<WGPUProgram>(pipelineState.program);
     assert_invariant(program);
     assert_invariant(program->computeShaderModule == nullptr &&
@@ -960,7 +952,7 @@ void WebGPUDriver::bindPipeline(PipelineState const& pipelineState) {
             *vertexBufferInfo, layout, pipelineState.rasterState, pipelineState.stencilState,
             pipelineState.polygonOffset, pipelineState.primitiveType, mSwapChain->getColorFormat(),
             mSwapChain->getDepthFormat());
-    mPipelineMap[hash] = pipeline;
+    // TODO: uncomment once we have a valid pipeline to set
     mRenderPassEncoder.SetPipeline(pipeline);
 }
 

filament/backend/src/webgpu/WebGPUDriver.h

@@ -93,8 +93,6 @@ private:
     wgpu::RenderPassEncoder mRenderPassEncoder = nullptr;
     wgpu::CommandBuffer mCommandBuffer = nullptr;
     WGPURenderTarget* mDefaultRenderTarget = nullptr;
-
-    tsl::robin_map<uint32_t, wgpu::RenderPipeline> mPipelineMap;
     /*
      * Driver interface
      */

filament/backend/test/Shader.cpp

@@ -57,7 +57,7 @@ Shader::Shader(DriverApi& api, Cleanup& cleanup, ShaderConfig config) : mCleanup
 
     if (!kLayouts.empty()) {
         mDescriptorSetLayout =
-                cleanup.add(api.createDescriptorSetLayout(DescriptorSetLayout{ .bindings = kLayouts }));
+                cleanup.add(api.createDescriptorSetLayout(DescriptorSetLayout{ kLayouts }));
     }
 }
 

filament/src/MaterialParser.cpp

@@ -648,32 +648,44 @@ bool ChunkAttributeInfo::unflatten(Unflattener& unflattener,
 bool ChunkDescriptorBindingsInfo::unflatten(Unflattener& unflattener,
         MaterialParser::DescriptorBindingsContainer* container) {
 
-    static_assert(sizeof(DescriptorSetBindingPoints) == sizeof(uint8_t));
-
-    uint8_t descriptorCount;
-    if (!unflattener.read(&descriptorCount)) {
+    uint8_t setCount;
+    if (!unflattener.read(&setCount)) {
         return false;
     }
 
-    auto& descriptors = (*container)[+DescriptorSetBindingPoints::PER_MATERIAL];
-    descriptors.reserve(descriptorCount);
-    for (size_t i = 0; i < descriptorCount; i++) {
-        CString name;
-        if (!unflattener.read(&name)) {
+    for (size_t j = 0; j < setCount; j++) {
+        static_assert(sizeof(DescriptorSetBindingPoints) == sizeof(uint8_t));
+
+        DescriptorSetBindingPoints set;
+        if (!unflattener.read(reinterpret_cast<uint8_t*>(&set))) {
             return false;
         }
-        uint8_t type;
-        if (!unflattener.read(&type)) {
+
+        uint8_t descriptorCount;
+        if (!unflattener.read(&descriptorCount)) {
             return false;
         }
-        uint8_t binding;
-        if (!unflattener.read(&binding)) {
-            return false;
+
+        auto& descriptors = (*container)[+set];
+        descriptors.reserve(descriptorCount);
+        for (size_t i = 0; i < descriptorCount; i++) {
+            CString name;
+            if (!unflattener.read(&name)) {
+                return false;
+            }
+            uint8_t type;
+            if (!unflattener.read(&type)) {
+                return false;
+            }
+            uint8_t binding;
+            if (!unflattener.read(&binding)) {
+                return false;
+            }
+            descriptors.push_back({
+                    std::move(name),
+                    DescriptorType(type),
+                    descriptor_binding_t(binding)});
         }
-        descriptors.push_back({
-                std::move(name),
-                DescriptorType(type),
-                descriptor_binding_t(binding)});
     }
 
     return true;
@@ -681,40 +693,42 @@ bool ChunkDescriptorBindingsInfo::unflatten(Unflattener& unflattener,
 
 bool ChunkDescriptorSetLayoutInfo::unflatten(Unflattener& unflattener,
         MaterialParser::DescriptorSetLayoutContainer* container) {
-    uint8_t descriptorCount;
-    if (!unflattener.read(&descriptorCount)) {
-        return false;
-    }
-    auto& descriptors = container->bindings;
-    descriptors.reserve(descriptorCount);
-    for (size_t i = 0; i < descriptorCount; i++) {
-        uint8_t type;
-        if (!unflattener.read(&type)) {
+    for (size_t j = 0; j < 2; j++) {
+        uint8_t descriptorCount;
+        if (!unflattener.read(&descriptorCount)) {
             return false;
         }
-        uint8_t stageFlags;
-        if (!unflattener.read(&stageFlags)) {
-            return false;
+        auto& descriptors = (*container)[j].bindings;
+        descriptors.reserve(descriptorCount);
+        for (size_t i = 0; i < descriptorCount; i++) {
+            uint8_t type;
+            if (!unflattener.read(&type)) {
+                return false;
+            }
+            uint8_t stageFlags;
+            if (!unflattener.read(&stageFlags)) {
+                return false;
+            }
+            uint8_t binding;
+            if (!unflattener.read(&binding)) {
+                return false;
+            }
+            uint8_t flags;
+            if (!unflattener.read(&flags)) {
+                return false;
+            }
+            uint16_t count;
+            if (!unflattener.read(&count)) {
+                return false;
+            }
+            descriptors.push_back({
+                    DescriptorType(type),
+                    ShaderStageFlags(stageFlags),
+                    descriptor_binding_t(binding),
+                    DescriptorFlags(flags),
+                    count,
+            });
         }
-        uint8_t binding;
-        if (!unflattener.read(&binding)) {
-            return false;
-        }
-        uint8_t flags;
-        if (!unflattener.read(&flags)) {
-            return false;
-        }
-        uint16_t count;
-        if (!unflattener.read(&count)) {
-            return false;
-        }
-        descriptors.push_back({
-            DescriptorType(type),
-            ShaderStageFlags(stageFlags),
-            descriptor_binding_t(binding),
-            DescriptorFlags(flags),
-            count,
-        });
     }
     return true;
 }

filament/src/MaterialParser.h

@@ -93,7 +93,7 @@ public:
     using DescriptorBindingsContainer = backend::Program::DescriptorSetInfo;
     bool getDescriptorBindings(DescriptorBindingsContainer* container) const noexcept;
 
-    using DescriptorSetLayoutContainer = backend::DescriptorSetLayout;
+    using DescriptorSetLayoutContainer = std::array<backend::DescriptorSetLayout, 2>;
     bool getDescriptorSetLayout(DescriptorSetLayoutContainer* container) const noexcept;
 
     bool getDepthWriteSet(bool* value) const noexcept;

filament/src/details/Material.cpp

@@ -609,12 +609,9 @@ Program FMaterial::getProgramWithVariants(
         program.attributes(mAttributeInfo);
     }
 
-    program.descriptorBindings(+DescriptorSetBindingPoints::PER_VIEW,
-            mProgramDescriptorBindings[+DescriptorSetBindingPoints::PER_VIEW]);
-    program.descriptorBindings(+DescriptorSetBindingPoints::PER_RENDERABLE,
-            mProgramDescriptorBindings[+DescriptorSetBindingPoints::PER_RENDERABLE]);
-    program.descriptorBindings(+DescriptorSetBindingPoints::PER_MATERIAL,
-            mProgramDescriptorBindings[+DescriptorSetBindingPoints::PER_MATERIAL]);
+    program.descriptorBindings(0, mProgramDescriptorBindings[0]);
+    program.descriptorBindings(1, mProgramDescriptorBindings[1]);
+    program.descriptorBindings(2, mProgramDescriptorBindings[2]);
     program.specializationConstants(mSpecializationConstants);
 
     program.pushConstants(ShaderStage::VERTEX, mPushConstants[uint8_t(ShaderStage::VERTEX)]);
@@ -1143,45 +1140,37 @@ void FMaterial::precacheDepthVariants(FEngine& engine) {
 void FMaterial::processDescriptorSets(FEngine& engine, MaterialParser const* const parser) {
     UTILS_UNUSED_IN_RELEASE bool success;
 
+
     success = parser->getDescriptorBindings(&mProgramDescriptorBindings);
     assert_invariant(success);
 
-    backend::DescriptorSetLayout descriptorSetLayout;
+    std::array<backend::DescriptorSetLayout, 2> descriptorSetLayout;
     success = parser->getDescriptorSetLayout(&descriptorSetLayout);
     assert_invariant(success);
-    auto perMatLabel = mName;
-    perMatLabel.append("_perMat");
-    descriptorSetLayout.label = std::move(perMatLabel);
 
-    // get the PER_VIEW descriptor binding info
-    auto perViewDescriptorSetLayout =
-            descriptor_sets::getPerViewDescriptorSetLayout(mMaterialDomain, mVariantFilterMask,
-            mIsVariantLit || mHasShadowMultiplier, mReflectionMode, mRefractionMode);
-    auto perViewLabel = mName;
-    perViewLabel.append("_perView");
-    perViewDescriptorSetLayout.label = std::move(perViewLabel);
+    // Setup Labels for debugging
+    utils::CString namestr;
+    utils::StaticString perViewStr = "_perView";
+    utils::StaticString singleStr = "_single";
 
-    // get the PER_RENDERABLE and PER_VIEW descriptor binding info
-    for (auto&& [bindingPoint, descriptorSetLayout] : {
-            std::pair{ DescriptorSetBindingPoints::PER_RENDERABLE,
-                    descriptor_sets::getPerRenderableLayout() },
-            std::pair{ DescriptorSetBindingPoints::PER_VIEW,
-                    perViewDescriptorSetLayout }}) {
-        Program::DescriptorBindingsInfo& descriptors = mProgramDescriptorBindings[+bindingPoint];
-        descriptors.reserve(descriptorSetLayout.bindings.size());
-        for (auto const& entry: descriptorSetLayout.bindings) {
-            auto const& name = descriptor_sets::getDescriptorName(bindingPoint, entry.binding);
-            descriptors.push_back({ name, entry.type, entry.binding });
-        }
-    }
+    parser->getName(&namestr);
+
+    utils::CString singleLabel(namestr.c_str(), namestr.length() + singleStr.length());
+    memccpy(singleLabel.c_str() + namestr.length(), singleStr.c_str(), '\0', singleStr.length());
+
+    utils::CString perViewLabel(namestr.c_str(), namestr.length() + perViewStr.length());
+    memccpy(perViewLabel.c_str() + namestr.length(), perViewStr.c_str(), '\0', perViewStr.length());
+
+    descriptorSetLayout[0].label = namestr;
+    descriptorSetLayout[1].label = perViewLabel;
 
     mDescriptorSetLayout = {
             engine.getDescriptorSetLayoutFactory(),
-            engine.getDriverApi(), std::move(descriptorSetLayout) };
+            engine.getDriverApi(), std::move(descriptorSetLayout[0]) };
 
     mPerViewDescriptorSetLayout = {
             engine.getDescriptorSetLayoutFactory(),
-            engine.getDriverApi(), perViewDescriptorSetLayout };
+            engine.getDriverApi(), std::move(descriptorSetLayout[1]) };
 }
 
 descriptor_binding_t FMaterial::getSamplerBinding(

libs/filabridge/include/private/filament/DescriptorSets.h

@@ -20,7 +20,6 @@
 #include <backend/DriverEnums.h>
 
 #include <private/filament/EngineEnums.h>
-#include <private/filament/Variant.h>
 
 #include <filament/MaterialEnums.h>
 
@@ -40,16 +39,8 @@ backend::DescriptorSetLayout getPerViewDescriptorSetLayout(
         ReflectionMode reflectionMode,
         RefractionMode refractionMode) noexcept;
 
-backend::DescriptorSetLayout getPerViewDescriptorSetLayoutWithVariant(
-        Variant variant,
-        MaterialDomain domain,
-        UserVariantFilterMask variantFilter,
-        bool isLit,
-        ReflectionMode reflectionMode,
-        RefractionMode refractionMode) noexcept;
-
 utils::CString getDescriptorName(
-        DescriptorSetBindingPoints set,
+        filament::DescriptorSetBindingPoints set,
         backend::descriptor_binding_t binding) noexcept;
 
 } // namespace filament::descriptor_sets

libs/filabridge/include/private/filament/SamplerInterfaceBlock.h

@@ -23,8 +23,6 @@
 #include <utils/CString.h>
 #include <utils/FixedCapacityVector.h>
 
-#include <private/filament/DescriptorSets.h>
-
 #include <initializer_list>
 #include <unordered_map>
 #include <string_view>
@@ -130,9 +128,6 @@ public:
 
     static utils::CString generateUniformName(const char* group, const char* sampler) noexcept;
 
-    static SamplerInfoList filterSamplerList(SamplerInfoList list,
-            backend::DescriptorSetLayout const& descriptorSetLayout);
-
 private:
     friend class Builder;
 

libs/filabridge/src/DescriptorSets.cpp

@@ -17,7 +17,6 @@
 #include "private/filament/DescriptorSets.h"
 
 #include <private/filament/EngineEnums.h>
-#include <private/filament/Variant.h>
 
 #include <filament/MaterialEnums.h>
 
@@ -27,35 +26,38 @@
 #include <utils/debug.h>
 
 #include <algorithm>
-#include <initializer_list>
-#include <string_view>
 #include <unordered_map>
+#include <string_view>
 
 namespace filament::descriptor_sets {
 
 using namespace backend;
 
-static constexpr std::initializer_list<DescriptorSetLayoutBinding> postProcessDescriptorSetLayoutList = {
+static DescriptorSetLayout const postProcessDescriptorSetLayout{
+    utils::StaticString("postProcess"),{
     { DescriptorType::UNIFORM_BUFFER, ShaderStageFlags::VERTEX | ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::FRAME_UNIFORMS },
-};
+}};
 
-static constexpr std::initializer_list<DescriptorSetLayoutBinding> depthVariantDescriptorSetLayoutList = {
+static DescriptorSetLayout const depthVariantDescriptorSetLayout{
+    utils::StaticString("depthVariant"),{
     { DescriptorType::UNIFORM_BUFFER, ShaderStageFlags::VERTEX | ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::FRAME_UNIFORMS },
-};
+}};
 
 // ssrVariantDescriptorSetLayout must match perViewDescriptorSetLayout's vertex stage. This is
 // because the SSR variant is always using the "standard" vertex shader (i.e. there is no
 // dedicated SSR vertex shader), which uses perViewDescriptorSetLayout.
 // This means that PerViewBindingPoints::SHADOWS must be in the layout even though it's not used
 // by the SSR variant.
-static constexpr std::initializer_list<DescriptorSetLayoutBinding> ssrVariantDescriptorSetLayoutList = {
-    { DescriptorType::UNIFORM_BUFFER, ShaderStageFlags::VERTEX | ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::FRAME_UNIFORMS },
-    { DescriptorType::UNIFORM_BUFFER, ShaderStageFlags::VERTEX | ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::SHADOWS        },
-    { DescriptorType::SAMPLER,                                   ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::STRUCTURE      },
-    { DescriptorType::SAMPLER,                                   ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::SSR            },
-};
+static DescriptorSetLayout const ssrVariantDescriptorSetLayout{
+    utils::StaticString("ssrVariant"),{
+   { DescriptorType::UNIFORM_BUFFER, ShaderStageFlags::VERTEX | ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::FRAME_UNIFORMS },
+   { DescriptorType::UNIFORM_BUFFER, ShaderStageFlags::VERTEX | ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::SHADOWS        },
+   { DescriptorType::SAMPLER,                                   ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::STRUCTURE      },
+   { DescriptorType::SAMPLER,                                   ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::SSR            },
+}};
 
-static constexpr std::initializer_list<DescriptorSetLayoutBinding> perViewDescriptorSetLayoutList = {
+static DescriptorSetLayout perViewDescriptorSetLayout = {
+    utils::StaticString("perView"),{
     { DescriptorType::UNIFORM_BUFFER, ShaderStageFlags::VERTEX | ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::FRAME_UNIFORMS },
     { DescriptorType::UNIFORM_BUFFER, ShaderStageFlags::VERTEX | ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::SHADOWS        },
     { DescriptorType::UNIFORM_BUFFER,                            ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::LIGHTS         },
@@ -68,37 +70,17 @@ static constexpr std::initializer_list<DescriptorSetLayoutBinding> perViewDescri
     { DescriptorType::SAMPLER,                                   ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::SSAO           },
     { DescriptorType::SAMPLER,                                   ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::SSR            },
     { DescriptorType::SAMPLER,                                   ShaderStageFlags::FRAGMENT,  +PerViewBindingPoints::FOG            },
-};
+}};
 
-static constexpr std::initializer_list<DescriptorSetLayoutBinding> perRenderableDescriptorSetLayoutList = {
+static DescriptorSetLayout perRenderableDescriptorSetLayout = {
+    utils::StaticString("perRenderable"),{
     { DescriptorType::UNIFORM_BUFFER, ShaderStageFlags::VERTEX | ShaderStageFlags::FRAGMENT,  +PerRenderableBindingPoints::OBJECT_UNIFORMS, DescriptorFlags::DYNAMIC_OFFSET },
     { DescriptorType::UNIFORM_BUFFER, ShaderStageFlags::VERTEX | ShaderStageFlags::FRAGMENT,  +PerRenderableBindingPoints::BONES_UNIFORMS,  DescriptorFlags::DYNAMIC_OFFSET },
     { DescriptorType::UNIFORM_BUFFER, ShaderStageFlags::VERTEX | ShaderStageFlags::FRAGMENT,  +PerRenderableBindingPoints::MORPHING_UNIFORMS         },
     { DescriptorType::SAMPLER,        ShaderStageFlags::VERTEX                             ,  +PerRenderableBindingPoints::MORPH_TARGET_POSITIONS    },
     { DescriptorType::SAMPLER,        ShaderStageFlags::VERTEX                             ,  +PerRenderableBindingPoints::MORPH_TARGET_TANGENTS     },
     { DescriptorType::SAMPLER,        ShaderStageFlags::VERTEX                             ,  +PerRenderableBindingPoints::BONES_INDICES_AND_WEIGHTS },
-};
-
-// used for post-processing passes
-static DescriptorSetLayout const postProcessDescriptorSetLayout{ utils::StaticString("postProcess"),
-    postProcessDescriptorSetLayoutList };
-
-// used to generate shadow-maps
-static DescriptorSetLayout const depthVariantDescriptorSetLayout{
-    utils::StaticString("depthVariant"), depthVariantDescriptorSetLayoutList
-};
-
-static DescriptorSetLayout const ssrVariantDescriptorSetLayout{ utils::StaticString("ssrVariant"),
-    ssrVariantDescriptorSetLayoutList };
-
-// Used for generating the color pass (i.e. the main pass). This is in fact a template that gets
-// declined into 8 different layouts, based on variants.
-static DescriptorSetLayout perViewDescriptorSetLayout = { utils::StaticString("perView"),
-    perViewDescriptorSetLayoutList };
-
-static DescriptorSetLayout perRenderableDescriptorSetLayout = {
-    utils::StaticString("perRenderable"), perRenderableDescriptorSetLayoutList
-};
+}};
 
 DescriptorSetLayout const& getPostProcessLayout() noexcept {
     return postProcessDescriptorSetLayout;
@@ -116,8 +98,8 @@ DescriptorSetLayout const& getPerRenderableLayout() noexcept {
     return perRenderableDescriptorSetLayout;
 }
 
-utils::CString getDescriptorName(DescriptorSetBindingPoints const set,
-        descriptor_binding_t const binding) noexcept {
+utils::CString getDescriptorName(DescriptorSetBindingPoints set,
+        descriptor_binding_t binding) noexcept {
     using namespace std::literals;
 
     static std::unordered_map<descriptor_binding_t, std::string_view> const set0{{
@@ -163,11 +145,11 @@ utils::CString getDescriptorName(DescriptorSetBindingPoints const set,
 }
 
 DescriptorSetLayout getPerViewDescriptorSetLayout(
-        MaterialDomain const domain,
-        UserVariantFilterMask const variantFilter,
-        bool const isLit,
-        ReflectionMode const reflectionMode,
-        RefractionMode const refractionMode) noexcept {
+        MaterialDomain domain,
+        UserVariantFilterMask variantFilter,
+        bool isLit,
+        ReflectionMode reflectionMode,
+        RefractionMode refractionMode) noexcept {
 
     bool const ssr = reflectionMode == ReflectionMode::SCREEN_SPACE ||
                      refractionMode == RefractionMode::SCREEN_SPACE;
@@ -210,65 +192,11 @@ DescriptorSetLayout getPerViewDescriptorSetLayout(
             return layout;
         }
         case MaterialDomain::POST_PROCESS:
-            return postProcessDescriptorSetLayout;
+            return descriptor_sets::getPostProcessLayout();
         case MaterialDomain::COMPUTE:
             // TODO: what's the layout for compute?
-            return postProcessDescriptorSetLayout;
+            return descriptor_sets::getPostProcessLayout();
     }
 }
 
-DescriptorSetLayout getPerViewDescriptorSetLayoutWithVariant(
-        Variant const variant,
-        MaterialDomain domain,
-        UserVariantFilterMask const variantFilter,
-        bool const isLit,
-        ReflectionMode const reflectionMode,
-        RefractionMode const refractionMode) noexcept {
-    if (Variant::isValidDepthVariant(variant)) {
-        return depthVariantDescriptorSetLayout;
-    }
-    if (Variant::isSSRVariant(variant)) {
-        return ssrVariantDescriptorSetLayout;
-    }
-    // We need to filter out all the descriptors not included in the "resolved" layout below
-    return getPerViewDescriptorSetLayout(domain, variantFilter,
-            isLit, reflectionMode, refractionMode);
-}
-
-
-
-template<class ITERATOR, class PREDICATE>
-constexpr static ITERATOR find_if(ITERATOR first, ITERATOR last, PREDICATE pred) {
-    for (; first != last; ++first)
-        if (pred(*first)) break;
-    return first;
-}
-
-constexpr static bool checkConsistency() noexcept {
-    // check that all descriptors that apply to the vertex stage in perViewDescriptorSetLayout
-    // are present in ssrVariantDescriptorSetLayout; meaning that the latter is compatible
-    // with the former.
-    for (auto const& r: perViewDescriptorSetLayoutList) {
-        if (hasShaderType(r.stageFlags, ShaderStage::VERTEX)) {
-            auto const pos = find_if(
-                    ssrVariantDescriptorSetLayoutList.begin(),
-                    ssrVariantDescriptorSetLayoutList.end(),
-                    [r](auto const& l) {
-                        return l.count == r.count &&
-                               l.type == r.type &&
-                               l.binding == r.binding &&
-                               l.flags == r.flags &&
-                               l.stageFlags == r.stageFlags;
-                    });
-            if (pos == ssrVariantDescriptorSetLayoutList.end()) {
-                return false;
-            }
-        }
-    }
-    return true;
-}
-
-static_assert(checkConsistency(), "ssrVariantDescriptorSetLayout is not compatible with "
-        "perViewDescriptorSetLayout");
-
 } // namespace filament::descriptor_sets

libs/filabridge/src/SamplerInterfaceBlock.cpp

@@ -16,7 +16,6 @@
 
 #include "private/filament/SamplerInterfaceBlock.h"
 
-#include <private/filament/DescriptorSets.h>
 
 #include <backend/DriverEnums.h>
 
@@ -103,7 +102,7 @@ const SamplerInterfaceBlock::SamplerInfo* SamplerInterfaceBlock::getSamplerInfo(
     return &mSamplersInfoList[pos->second];
 }
 
-CString SamplerInterfaceBlock::generateUniformName(const char* group, const char* sampler) noexcept {
+utils::CString SamplerInterfaceBlock::generateUniformName(const char* group, const char* sampler) noexcept {
     char uniformName[256];
 
     // sampler interface block name
@@ -118,27 +117,9 @@ CString SamplerInterfaceBlock::generateUniformName(const char* group, const char
             std::min(sizeof(uniformName) / 2 - 2, strlen(sampler)),
             prefix + 1);
     *last++ = 0; // null terminator
-    assert_invariant(last <= std::end(uniformName));
+    assert(last <= std::end(uniformName));
 
     return CString{ uniformName, size_t(last - uniformName) - 1u };
 }
 
-SamplerInterfaceBlock::SamplerInfoList SamplerInterfaceBlock::filterSamplerList(
-        SamplerInfoList list, backend::DescriptorSetLayout const& descriptorSetLayout) {
-    // remove all the samplers that are not included in the descriptor-set layout
-    list.erase(
-            std::remove_if(list.begin(), list.end(),
-                    [&](auto const& entry) {
-                        auto pos = std::find_if(
-                                descriptorSetLayout.bindings.begin(),
-                                descriptorSetLayout.bindings.end(),
-                                [&entry](const auto& item) {
-                                    return item.binding == entry.binding;
-                                });
-                        return pos == descriptorSetLayout.bindings.end();
-                    }), list.end());
-
-    return list;
-}
-
 } // namespace filament

libs/filamat/include/filamat/MaterialBuilder.h

@@ -603,7 +603,7 @@ public:
      * extension will be derived from the shader stage. For example, mymaterial_0x0e.frag,
      * mymaterial_0x18.vert, etc.
      */
-    MaterialBuilder& saveRawVariants(bool saveRawVariants) noexcept;
+    MaterialBuilder& saveRawVariants(bool saveVariants) noexcept;
 
     //! If true, will include debugging information in generated SPIRV.
     MaterialBuilder& generateDebugInfo(bool generateDebugInfo) noexcept;
@@ -635,7 +635,7 @@ public:
      * Build the material. If you are using the Filament engine with this library, you should use
      * the job system provided by Engine.
      */
-    Package build(utils::JobSystem& jobSystem);
+    Package build(utils::JobSystem& jobSystem) noexcept;
 
 public:
     // The methods and types below are for internal use
@@ -809,7 +809,7 @@ private:
     // Multiple calls to findProperties accumulate the property sets across fragment
     // and vertex shaders in mProperties.
     bool findProperties(filament::backend::ShaderStage type,
-            MaterialBuilder::PropertyList const& allProperties,
+            MaterialBuilder::PropertyList& allProperties,
             CodeGenParams const& semanticCodeGenParams) noexcept;
 
     bool runSemanticAnalysis(MaterialInfo* inOutInfo,

libs/filamat/src/GLSLPostProcessor.cpp

@@ -34,19 +34,14 @@
 
 #include "MetalArgumentBuffer.h"
 #include "SpirvFixup.h"
+#include "utils/ostream.h"
 
 #include <filament/MaterialEnums.h>
 
-#include <utils/compiler.h>
-#include <utils/debug.h>
 #include <utils/Log.h>
-#include <utils/ostream.h>
 
-#include <algorithm>
-#include <optional>
 #include <sstream>
 #include <unordered_map>
-#include <utility>
 #include <vector>
 
 #ifdef FILAMENT_SUPPORTS_WEBGPU
@@ -156,16 +151,21 @@ DescriptorSetLayout getPerMaterialDescriptorSet(SamplerInterfaceBlock const& sib
     return layout;
 }
 
-static void collectDescriptorsForSet(DescriptorSetBindingPoints set,
+static void collectDescriptorsForSet(filament::DescriptorSetBindingPoints set,
         const GLSLPostProcessor::Config& config, DescriptorSetInfo& descriptors) {
     const MaterialInfo& material = *config.materialInfo;
 
-    // get the descriptor set layout for the given pinding point
-    DescriptorSetLayout const descriptorSetLayout = [&] {
+    DescriptorSetLayout const info = [&]() {
         switch (set) {
             case DescriptorSetBindingPoints::PER_VIEW: {
-                return descriptor_sets::getPerViewDescriptorSetLayoutWithVariant(
-                        config.variant, config.domain, config.variantFilter,
+                if (filament::Variant::isValidDepthVariant(config.variant)) {
+                    return descriptor_sets::getDepthVariantLayout();
+                }
+                if (filament::Variant::isSSRVariant(config.variant)) {
+                    return descriptor_sets::getSsrVariantLayout();
+                }
+                return descriptor_sets::getPerViewDescriptorSetLayout(config.domain,
+                        config.variantFilter,
                         material.isLit || material.hasShadowMultiplier,
                         material.reflectionMode,
                         material.refractionMode);
@@ -179,8 +179,7 @@ static void collectDescriptorsForSet(DescriptorSetBindingPoints set,
         }
     }();
 
-    // get the sampler list for this binding point
-    auto samplerList = [&] {
+    auto samplerList = [&]() {
         switch (set) {
             case DescriptorSetBindingPoints::PER_VIEW:
                 return SibGenerator::getPerViewSib(config.variant).getSamplerInfoList();
@@ -193,34 +192,42 @@ static void collectDescriptorsForSet(DescriptorSetBindingPoints set,
         }
     }();
 
-    // filter the list with the descriptor set layout
-    auto const descriptorSetSamplerList =
-            SamplerInterfaceBlock::filterSamplerList(std::move(samplerList), descriptorSetLayout);
+    // remove all the samplers that are not included in the descriptor-set layout
+    samplerList.erase(std::remove_if(samplerList.begin(), samplerList.end(),
+                              [&info](auto const& entry) {
+                                  auto pos = std::find_if(info.bindings.begin(),
+                                          info.bindings.end(), [&entry](const auto& item) {
+                                              return item.binding == entry.binding;
+                                          });
+                                  return pos == info.bindings.end();
+                              }),
+            samplerList.end());
 
-    // helper to get the name of a descriptor for this set, given a binding.
-    auto getDescriptorName = [set, &descriptorSetSamplerList](descriptor_binding_t binding) {
+    auto getDescriptorName = [&](DescriptorSetBindingPoints set, descriptor_binding_t binding) {
         if (set == DescriptorSetBindingPoints::PER_MATERIAL) {
-            auto pos = std::find_if(descriptorSetSamplerList.begin(), descriptorSetSamplerList.end(),
+            auto pos = std::find_if(samplerList.begin(), samplerList.end(),
                     [&](const auto& entry) { return entry.binding == binding; });
-            if (pos == descriptorSetSamplerList.end()) {
+            if (pos == samplerList.end()) {
                 return descriptor_sets::getDescriptorName(set, binding);
             }
-            return pos->uniformName;
+            SamplerInterfaceBlock::SamplerInfo& sampler = *pos;
+            return sampler.uniformName;
         }
         return descriptor_sets::getDescriptorName(set, binding);
     };
 
-    for (auto descriptor : descriptorSetLayout.bindings) {
-        descriptor_binding_t binding = descriptor.binding;
-        auto name = getDescriptorName(binding);
-        if (descriptor.type == DescriptorType::SAMPLER ||
-            descriptor.type == DescriptorType::SAMPLER_EXTERNAL) {
-            auto pos = std::find_if(descriptorSetSamplerList.begin(), descriptorSetSamplerList.end(),
+    for (size_t i = 0; i < info.bindings.size(); i++) {
+        backend::descriptor_binding_t binding = info.bindings[i].binding;
+        auto name = getDescriptorName(set, binding);
+        if (info.bindings[i].type == DescriptorType::SAMPLER ||
+            info.bindings[i].type == DescriptorType::SAMPLER_EXTERNAL) {
+            auto pos = std::find_if(samplerList.begin(), samplerList.end(),
                     [&](const auto& entry) { return entry.binding == binding; });
-            assert_invariant(pos != descriptorSetSamplerList.end());
-            descriptors.emplace_back(name, descriptor, *pos);
+            assert_invariant(pos != samplerList.end());
+            SamplerInterfaceBlock::SamplerInfo& sampler = *pos;
+            descriptors.emplace_back(name, info.bindings[i], sampler);
         } else {
-            descriptors.emplace_back(name, descriptor, std::nullopt);
+            descriptors.emplace_back(name, info.bindings[i], std::nullopt);
         }
     }
 
@@ -358,7 +365,7 @@ static std::string stringifySpvOptimizerMessage(spv_message_level_t level, const
 }
 
 void GLSLPostProcessor::spirvToMsl(const SpirvBlob* spirv, std::string* outMsl,
-        ShaderStage stage, ShaderModel shaderModel,
+        filament::backend::ShaderStage stage, filament::backend::ShaderModel shaderModel,
         bool useFramebufferFetch, const DescriptorSets& descriptorSets,
         const ShaderMinifier* minifier) {
     using namespace msl;
@@ -667,7 +674,7 @@ bool GLSLPostProcessor::process(const std::string& inputShader, Config const& co
         //        SpvRules should be enough.
         //        I think this could cause the compilation to fail on gl_VertexID.
         using Type = std::underlying_type_t<EShMessages>;
-        msg = EShMessages(Type(msg) | Type(EShMsgVulkanRules));
+        msg = EShMessages(Type(msg) | Type(EShMessages::EShMsgVulkanRules));
     }
 
     bool const ok = tShader.parse(&DefaultTBuiltInResource, internalConfig.langVersion, false, msg);
@@ -677,7 +684,7 @@ bool GLSLPostProcessor::process(const std::string& inputShader, Config const& co
     }
 
     // add texture lod bias
-    if (config.shaderType == ShaderStage::FRAGMENT &&
+    if (config.shaderType == backend::ShaderStage::FRAGMENT &&
         config.domain == MaterialDomain::SURFACE) {
         GLSLTools::textureLodBias(tShader);
     }
@@ -753,8 +760,8 @@ bool GLSLPostProcessor::process(const std::string& inputShader, Config const& co
     return true;
 }
 
-bool GLSLPostProcessor::preprocessOptimization(TShader& tShader,
-        Config const& config, InternalConfig& internalConfig) const {
+bool GLSLPostProcessor::preprocessOptimization(glslang::TShader& tShader,
+        GLSLPostProcessor::Config const& config, InternalConfig& internalConfig) const {
     using TargetApi = MaterialBuilder::TargetApi;
     assert_invariant(bool(internalConfig.spirvOutput) == (config.targetApi != TargetApi::OPENGL));
 
@@ -825,7 +832,7 @@ bool GLSLPostProcessor::preprocessOptimization(TShader& tShader,
 }
 
 bool GLSLPostProcessor::fullOptimization(const TShader& tShader,
-        Config const& config, InternalConfig& internalConfig) const {
+        GLSLPostProcessor::Config const& config, InternalConfig& internalConfig) const {
     SpirvBlob spirv;
 
     bool const optimizeForSize = mOptimization == MaterialBuilderBase::Optimization::SIZE;
@@ -921,7 +928,7 @@ bool GLSLPostProcessor::fullOptimization(const TShader& tShader,
 #else
         try {
             *internalConfig.glslOutput = glslCompiler.compile();
-        } catch (CompilerError e) {
+        } catch (spirv_cross::CompilerError e) {
             slog.e << "ERROR: " << e.what() << io::endl;
             return false;
         }
@@ -941,8 +948,8 @@ bool GLSLPostProcessor::fullOptimization(const TShader& tShader,
     return true;
 }
 
-std::shared_ptr<Optimizer> GLSLPostProcessor::createEmptyOptimizer() {
-    auto optimizer = std::make_shared<Optimizer>(SPV_ENV_UNIVERSAL_1_3);
+std::shared_ptr<spvtools::Optimizer> GLSLPostProcessor::createEmptyOptimizer() {
+    auto optimizer = std::make_shared<spvtools::Optimizer>(SPV_ENV_UNIVERSAL_1_3);
     optimizer->SetMessageConsumer([](spv_message_level_t level,
             const char* source, const spv_position_t& position, const char* message) {
         if (!filterSpvOptimizerMessage(level)) {
@@ -954,7 +961,7 @@ std::shared_ptr<Optimizer> GLSLPostProcessor::createEmptyOptimizer() {
     return optimizer;
 }
 
-std::shared_ptr<Optimizer> GLSLPostProcessor::createOptimizer(
+std::shared_ptr<spvtools::Optimizer> GLSLPostProcessor::createOptimizer(
         MaterialBuilder::Optimization optimization, Config const& config) {
     auto optimizer = createEmptyOptimizer();
 
@@ -993,7 +1000,7 @@ void GLSLPostProcessor::optimizeSpirv(OptimizerPtr optimizer, SpirvBlob& spirv)
 }
 
 void GLSLPostProcessor::fixupClipDistance(
-        SpirvBlob& spirv, Config const& config) const {
+        SpirvBlob& spirv, GLSLPostProcessor::Config const& config) const {
     if (!config.usesClipDistance) {
         return;
     }
@@ -1033,7 +1040,7 @@ void GLSLPostProcessor::fixupClipDistance(
 
 
 void GLSLPostProcessor::registerPerformancePasses(Optimizer& optimizer, Config const& config) {
-    auto RegisterPass = [&](Optimizer::PassToken&& pass,
+    auto RegisterPass = [&](spvtools::Optimizer::PassToken&& pass,
             MaterialBuilder::TargetApi apiFilter = MaterialBuilder::TargetApi::ALL) {
         if (!(config.targetApi & apiFilter)) {
             return;
@@ -1078,7 +1085,7 @@ void GLSLPostProcessor::registerPerformancePasses(Optimizer& optimizer, Config c
 }
 
 void GLSLPostProcessor::registerSizePasses(Optimizer& optimizer, Config const& config) {
-    auto RegisterPass = [&](Optimizer::PassToken&& pass,
+    auto RegisterPass = [&](spvtools::Optimizer::PassToken&& pass,
             MaterialBuilder::TargetApi apiFilter = MaterialBuilder::TargetApi::ALL) {
         if (!(config.targetApi & apiFilter)) {
             return;

libs/filamat/src/MaterialVariants.cpp

@@ -16,6 +16,8 @@
 
 #include "MaterialVariants.h"
 
+#include "shaders/ShaderGenerator.h"
+
 #include <private/filament/EngineEnums.h>
 #include <private/filament/Variant.h>
 
@@ -23,8 +25,16 @@
 
 #include <filament/MaterialEnums.h>
 
+#include <utils/compiler.h>
+#include <utils/Panic.h>
+#include <utils/Log.h>
+
+#include <algorithm>
 #include <vector>
 
+#include <stddef.h>
+#include <stdint.h>
+
 namespace filamat {
 
 std::vector<Variant> determineSurfaceVariants(
@@ -52,6 +62,58 @@ std::vector<Variant> determineSurfaceVariants(
         if (fragmentVariant == variant) {
             variants.emplace_back(variant, filament::backend::ShaderStage::FRAGMENT);
         }
+
+        // Here we make sure that the combination of vertex and fragment variants have compatible
+        // PER_VIEW descriptor-set layouts. This could actually be a static/compile-time check
+        // because it is entirely decided in DescriptorSets.cpp. Unfortunately it's not possible
+        // to write this entirely as a constexpr.
+
+        if (UTILS_UNLIKELY(vertexVariant != fragmentVariant)) {
+            // fragment and vertex variants are different, we need to check the layouts are
+            // compatible.
+            using filament::ReflectionMode;
+            using filament::RefractionMode;
+            using filament::backend::ShaderStage;
+
+            // And we need to do that for all configurations of the "PER_VIEW" descriptor set
+            // layouts (there are eight).
+            // See ShaderGenerator::getPerViewDescriptorSetLayoutWithVariant.
+            for (auto reflection: {
+                    ReflectionMode::SCREEN_SPACE,
+                    ReflectionMode::DEFAULT }) {
+                for (auto refraction: {
+                        RefractionMode::SCREEN_SPACE,
+                        RefractionMode::CUBEMAP,
+                        RefractionMode::NONE }) {
+                    auto const vdsl = ShaderGenerator::getPerViewDescriptorSetLayoutWithVariant(
+                            vertexVariant, userVariantFilter, isLit || shadowMultiplier,
+                            reflection, refraction);
+                    auto const fdsl = ShaderGenerator::getPerViewDescriptorSetLayoutWithVariant(
+                            fragmentVariant, userVariantFilter, isLit || shadowMultiplier,
+                            reflection, refraction);
+                    // Check that all bindings present in the vertex shader DescriptorSetLayout
+                    // are also present in the fragment shader DescriptorSetLayout.
+                    for (auto const& r: vdsl.bindings) {
+                        if (!hasShaderType(r.stageFlags, ShaderStage::VERTEX)) {
+                            // ignore descriptors that are of the fragment stage only
+                            continue;
+                        }
+                        auto const pos = std::find_if(fdsl.bindings.begin(), fdsl.bindings.end(),
+                                [r](auto const& l) {
+                                    return l.count == r.count && l.type == r.type &&
+                                           l.binding == r.binding && l.flags == r.flags &&
+                                           l.stageFlags == r.stageFlags;
+                                });
+
+                        // A mismatch is fatal. The material is ill-formed. This typically
+                        // mean a bug / inconsistency in DescriptorsSets.cpp
+                        FILAMENT_CHECK_POSTCONDITION(pos != fdsl.bindings.end())
+                                << "Variant " << +k << " has mismatched descriptorset layouts";
+                    }
+                }
+            }
+        }
+
     }
     return variants;
 }
@@ -71,7 +133,7 @@ std::vector<Variant> determinePostProcessVariants() {
 std::vector<Variant> determineComputeVariants() {
     // TODO: should we have variants for compute shaders?
     std::vector<Variant> variants;
-    filament::Variant const variant(0);
+    filament::Variant variant(0);
     variants.emplace_back(variant, filament::backend::ShaderStage::COMPUTE);
     return variants;
 }

libs/filamat/src/eiff/MaterialInterfaceBlockChunk.cpp

@@ -39,7 +39,7 @@ namespace filamat {
 
 MaterialUniformInterfaceBlockChunk::MaterialUniformInterfaceBlockChunk(
         BufferInterfaceBlock const& uib) :
-        Chunk(MaterialUib),
+        Chunk(ChunkType::MaterialUib),
         mUib(uib) {
 }
 
@@ -60,7 +60,7 @@ void MaterialUniformInterfaceBlockChunk::flatten(Flattener& f) {
 
 MaterialSamplerInterfaceBlockChunk::MaterialSamplerInterfaceBlockChunk(
         SamplerInterfaceBlock const& sib) :
-        Chunk(MaterialSib),
+        Chunk(ChunkType::MaterialSib),
         mSib(sib) {
 }
 
@@ -81,7 +81,7 @@ void MaterialSamplerInterfaceBlockChunk::flatten(Flattener& f) {
 // ------------------------------------------------------------------------------------------------
 
 MaterialSubpassInterfaceBlockChunk::MaterialSubpassInterfaceBlockChunk(SubpassInfo const& subpass) :
-        Chunk(MaterialSubpass),
+        Chunk(ChunkType::MaterialSubpass),
         mSubpass(subpass) {
 }
 
@@ -101,8 +101,8 @@ void MaterialSubpassInterfaceBlockChunk::flatten(Flattener& f) {
 // ------------------------------------------------------------------------------------------------
 
 MaterialConstantParametersChunk::MaterialConstantParametersChunk(
-        FixedCapacityVector<MaterialConstant> constants)
-    : Chunk(MaterialConstants), mConstants(std::move(constants)) {}
+        utils::FixedCapacityVector<MaterialConstant> constants)
+    : Chunk(ChunkType::MaterialConstants), mConstants(std::move(constants)) {}
 
 void MaterialConstantParametersChunk::flatten(Flattener& f) {
     f.writeUint64(mConstants.size());
@@ -115,8 +115,8 @@ void MaterialConstantParametersChunk::flatten(Flattener& f) {
 // ------------------------------------------------------------------------------------------------
 
 MaterialPushConstantParametersChunk::MaterialPushConstantParametersChunk(
-        CString const& structVarName, FixedCapacityVector<MaterialPushConstant> constants)
-    : Chunk(MaterialPushConstants),
+        CString const& structVarName, utils::FixedCapacityVector<MaterialPushConstant> constants)
+    : Chunk(ChunkType::MaterialPushConstants),
       mStructVarName(structVarName),
       mConstants(std::move(constants)) {}
 
@@ -133,7 +133,7 @@ void MaterialPushConstantParametersChunk::flatten(Flattener& f) {
 // ------------------------------------------------------------------------------------------------
 
 MaterialBindingUniformInfoChunk::MaterialBindingUniformInfoChunk(Container list) noexcept
-        : Chunk(MaterialBindingUniformInfo),
+        : Chunk(ChunkType::MaterialBindingUniformInfo),
           mBindingUniformInfo(std::move(list)) {
 }
 
@@ -155,7 +155,7 @@ void MaterialBindingUniformInfoChunk::flatten(Flattener& f) {
 // ------------------------------------------------------------------------------------------------
 
 MaterialAttributesInfoChunk::MaterialAttributesInfoChunk(Container list) noexcept
-        : Chunk(MaterialAttributeInfo),
+        : Chunk(ChunkType::MaterialAttributeInfo),
           mAttributeInfo(std::move(list))
 {
 }
@@ -170,9 +170,11 @@ void MaterialAttributesInfoChunk::flatten(Flattener& f) {
 
 // ------------------------------------------------------------------------------------------------
 
-MaterialDescriptorBindingsChuck::MaterialDescriptorBindingsChuck(Container const& sib) noexcept
-        : Chunk(MaterialDescriptorBindingsInfo),
-          mSamplerInterfaceBlock(sib) {
+MaterialDescriptorBindingsChuck::MaterialDescriptorBindingsChuck(Container const& sib,
+        backend::DescriptorSetLayout const& perViewLayout) noexcept
+        : Chunk(ChunkType::MaterialDescriptorBindingsInfo),
+          mSamplerInterfaceBlock(sib),
+          mPerViewLayout(perViewLayout) {
 }
 
 void MaterialDescriptorBindingsChuck::flatten(Flattener& f) {
@@ -181,6 +183,13 @@ void MaterialDescriptorBindingsChuck::flatten(Flattener& f) {
 
     using namespace backend;
 
+
+    // number of descriptor-sets
+    f.writeUint8(3);
+
+    // set
+    f.writeUint8(+DescriptorSetBindingPoints::PER_MATERIAL);
+
     // samplers + 1 descriptor for the UBO
     f.writeUint8(mSamplerInterfaceBlock.getSize() + 1);
 
@@ -201,13 +210,37 @@ void MaterialDescriptorBindingsChuck::flatten(Flattener& f) {
         }
         f.writeUint8(entry.binding);
     }
+
+    // set
+    f.writeUint8(+DescriptorSetBindingPoints::PER_RENDERABLE);
+    f.writeUint8(descriptor_sets::getPerRenderableLayout().bindings.size());
+    for (auto const& entry: descriptor_sets::getPerRenderableLayout().bindings) {
+        auto const& name = descriptor_sets::getDescriptorName(
+                DescriptorSetBindingPoints::PER_RENDERABLE, entry.binding);
+        f.writeString({ name.data(), name.size() });
+        f.writeUint8(uint8_t(entry.type));
+        f.writeUint8(entry.binding);
+    }
+
+    // set
+    f.writeUint8(+DescriptorSetBindingPoints::PER_VIEW);
+    f.writeUint8(mPerViewLayout.bindings.size());
+    for (auto const& entry: mPerViewLayout.bindings) {
+        auto const& name = descriptor_sets::getDescriptorName(
+                DescriptorSetBindingPoints::PER_VIEW, entry.binding);
+        f.writeString({ name.data(), name.size() });
+        f.writeUint8(uint8_t(entry.type));
+        f.writeUint8(entry.binding);
+    }
 }
 
 // ------------------------------------------------------------------------------------------------
 
-MaterialDescriptorSetLayoutChunk::MaterialDescriptorSetLayoutChunk(Container const& sib) noexcept
-        : Chunk(MaterialDescriptorSetLayoutInfo),
-          mSamplerInterfaceBlock(sib) {
+MaterialDescriptorSetLayoutChunk::MaterialDescriptorSetLayoutChunk(Container const& sib,
+        backend::DescriptorSetLayout const& perViewLayout) noexcept
+        : Chunk(ChunkType::MaterialDescriptorSetLayoutInfo),
+          mSamplerInterfaceBlock(sib),
+          mPerViewLayout(perViewLayout) {
 }
 
 void MaterialDescriptorSetLayoutChunk::flatten(Flattener& f) {
@@ -238,6 +271,18 @@ void MaterialDescriptorSetLayoutChunk::flatten(Flattener& f) {
         f.writeUint8(uint8_t(DescriptorFlags::NONE));
         f.writeUint16(0);
     }
+
+    // samplers + 1 descriptor for the UBO
+    f.writeUint8(mPerViewLayout.bindings.size());
+
+    // all the material's sampler descriptors
+    for (auto const& entry: mPerViewLayout.bindings) {
+        f.writeUint8(uint8_t(entry.type));
+        f.writeUint8(uint8_t(entry.stageFlags));
+        f.writeUint8(entry.binding);
+        f.writeUint8(uint8_t(entry.flags));
+        f.writeUint16(entry.count);
+    }
 }
 
 } // namespace filamat

libs/filamat/src/eiff/MaterialInterfaceBlockChunk.h

@@ -19,12 +19,16 @@
 
 #include "Chunk.h"
 
+#include <private/filament/EngineEnums.h>
+
+#include <backend/DriverEnums.h>
 #include <backend/Program.h>
 
 #include <utils/CString.h>
 #include <utils/FixedCapacityVector.h>
 
 #include <tuple>
+#include <utility>
 
 #include <stdint.h>
 
@@ -41,10 +45,10 @@ namespace filamat {
 class MaterialUniformInterfaceBlockChunk final : public Chunk {
 public:
     explicit MaterialUniformInterfaceBlockChunk(filament::BufferInterfaceBlock const& uib);
-    ~MaterialUniformInterfaceBlockChunk() override = default;
+    ~MaterialUniformInterfaceBlockChunk() final = default;
 
 private:
-    void flatten(Flattener&) override;
+    void flatten(Flattener&) final;
 
     filament::BufferInterfaceBlock const& mUib;
 };
@@ -54,10 +58,10 @@ private:
 class MaterialSamplerInterfaceBlockChunk final : public Chunk {
 public:
     explicit MaterialSamplerInterfaceBlockChunk(filament::SamplerInterfaceBlock const& sib);
-    ~MaterialSamplerInterfaceBlockChunk() override = default;
+    ~MaterialSamplerInterfaceBlockChunk() final = default;
 
 private:
-    void flatten(Flattener&) override;
+    void flatten(Flattener&) final;
 
     filament::SamplerInterfaceBlock const& mSib;
 };
@@ -67,10 +71,10 @@ private:
 class MaterialSubpassInterfaceBlockChunk final : public Chunk {
 public:
     explicit MaterialSubpassInterfaceBlockChunk(filament::SubpassInfo const& subpass);
-    ~MaterialSubpassInterfaceBlockChunk() override = default;
+    ~MaterialSubpassInterfaceBlockChunk() final = default;
 
 private:
-    void flatten(Flattener&) override;
+    void flatten(Flattener&) final;
 
     filament::SubpassInfo const& mSubpass;
 };
@@ -80,41 +84,41 @@ private:
 class MaterialConstantParametersChunk final : public Chunk {
 public:
     explicit MaterialConstantParametersChunk(
-            FixedCapacityVector<filament::MaterialConstant> constants);
-    ~MaterialConstantParametersChunk() override = default;
+            utils::FixedCapacityVector<filament::MaterialConstant> constants);
+    ~MaterialConstantParametersChunk() final = default;
 
 private:
-    void flatten(Flattener&) override;
+    void flatten(Flattener&) final;
 
-    FixedCapacityVector<filament::MaterialConstant> mConstants;
+    utils::FixedCapacityVector<filament::MaterialConstant> mConstants;
 };
 
 // ------------------------------------------------------------------------------------------------
 
 class MaterialPushConstantParametersChunk final : public Chunk {
 public:
-    explicit MaterialPushConstantParametersChunk(CString const& structVarName,
-            FixedCapacityVector<filament::MaterialPushConstant> constants);
-    ~MaterialPushConstantParametersChunk() override = default;
+    explicit MaterialPushConstantParametersChunk(utils::CString const& structVarName,
+            utils::FixedCapacityVector<filament::MaterialPushConstant> constants);
+    ~MaterialPushConstantParametersChunk() final = default;
 
 private:
-    void flatten(Flattener&) override;
+    void flatten(Flattener&) final;
 
-    CString mStructVarName;
-    FixedCapacityVector<filament::MaterialPushConstant> mConstants;
+    utils::CString mStructVarName;
+    utils::FixedCapacityVector<filament::MaterialPushConstant> mConstants;
 };
 
 // ------------------------------------------------------------------------------------------------
 
 class MaterialBindingUniformInfoChunk final : public Chunk {
     using Container = FixedCapacityVector<std::tuple<
-            uint8_t, CString, filament::backend::Program::UniformInfo>>;
+            uint8_t, utils::CString, filament::backend::Program::UniformInfo>>;
 public:
     explicit MaterialBindingUniformInfoChunk(Container list) noexcept;
-    ~MaterialBindingUniformInfoChunk() override = default;
+    ~MaterialBindingUniformInfoChunk() final = default;
 
 private:
-    void flatten(Flattener &) override;
+    void flatten(Flattener &) final;
 
     Container mBindingUniformInfo;
 };
@@ -122,13 +126,13 @@ private:
 // ------------------------------------------------------------------------------------------------
 
 class MaterialAttributesInfoChunk final : public Chunk {
-    using Container = FixedCapacityVector<std::pair<CString, uint8_t>>;
+    using Container = FixedCapacityVector<std::pair<utils::CString, uint8_t>>;
 public:
     explicit MaterialAttributesInfoChunk(Container list) noexcept;
-    ~MaterialAttributesInfoChunk() override = default;
+    ~MaterialAttributesInfoChunk() final = default;
 
 private:
-    void flatten(Flattener &) override;
+    void flatten(Flattener &) final;
 
     Container mAttributeInfo;
 };
@@ -138,13 +142,15 @@ private:
 class MaterialDescriptorBindingsChuck final : public Chunk {
     using Container = filament::SamplerInterfaceBlock;
 public:
-    explicit MaterialDescriptorBindingsChuck(Container const& sib) noexcept;
-    ~MaterialDescriptorBindingsChuck() override = default;
+    explicit MaterialDescriptorBindingsChuck(Container const& sib,
+            filament::backend::DescriptorSetLayout const& perViewLayout) noexcept;
+    ~MaterialDescriptorBindingsChuck() final = default;
 
 private:
-    void flatten(Flattener&) override;
+    void flatten(Flattener&) final;
 
     Container const& mSamplerInterfaceBlock;
+    filament::backend::DescriptorSetLayout mPerViewLayout;
 };
 
 // ------------------------------------------------------------------------------------------------
@@ -152,13 +158,15 @@ private:
 class MaterialDescriptorSetLayoutChunk final : public Chunk {
     using Container = filament::SamplerInterfaceBlock;
 public:
-    explicit MaterialDescriptorSetLayoutChunk(Container const& sib) noexcept;
-    ~MaterialDescriptorSetLayoutChunk() override = default;
+    explicit MaterialDescriptorSetLayoutChunk(Container const& sib,
+            filament::backend::DescriptorSetLayout const& perViewLayout) noexcept;
+    ~MaterialDescriptorSetLayoutChunk() final = default;
 
 private:
-    void flatten(Flattener&) override;
+    void flatten(Flattener&) final;
 
     Container const& mSamplerInterfaceBlock;
+    filament::backend::DescriptorSetLayout mPerViewLayout;
 };
 
 } // namespace filamat

libs/filamat/src/shaders/ShaderGenerator.cpp

@@ -604,13 +604,27 @@ std::string ShaderGenerator::createSurfaceFragmentProgram(ShaderModel shaderMode
 
     if (featureLevel >= FeatureLevel::FEATURE_LEVEL_1) {
         assert_invariant(mMaterialDomain == MaterialDomain::SURFACE);
+
+        auto const perViewDescriptorSetLayout = getPerViewDescriptorSetLayoutWithVariant(
+                variant, variantFilter,
+                material.isLit || material.hasShadowMultiplier,
+                material.reflectionMode, material.refractionMode);
+
         // this is the list of samplers we need to filter
-        auto const list = SamplerInterfaceBlock::filterSamplerList(
-                SibGenerator::getPerViewSib(variant).getSamplerInfoList(),
-                descriptor_sets::getPerViewDescriptorSetLayoutWithVariant(
-                        variant, mMaterialDomain, variantFilter,
-                        material.isLit || material.hasShadowMultiplier,
-                        material.reflectionMode, material.refractionMode));
+        auto list = SibGenerator::getPerViewSib(variant).getSamplerInfoList();
+
+        // remove all the samplers that are not included in the descriptor-set layout
+        list.erase(
+                std::remove_if(list.begin(), list.end(),
+                        [&perViewDescriptorSetLayout](auto const& entry) {
+                            auto pos = std::find_if(
+                                    perViewDescriptorSetLayout.bindings.begin(),
+                                    perViewDescriptorSetLayout.bindings.end(),
+                                    [&entry](const auto& item) {
+                                        return item.binding == entry.binding;
+                                    });
+                            return pos == perViewDescriptorSetLayout.bindings.end();
+                        }), list.end());
 
         cg.generateCommonSamplers(fs, DescriptorSetBindingPoints::PER_VIEW, list);
     }
@@ -827,4 +841,22 @@ bool ShaderGenerator::hasStereo(
             && featureLevel > MaterialBuilder::FeatureLevel::FEATURE_LEVEL_0;
 }
 
+backend::DescriptorSetLayout ShaderGenerator::getPerViewDescriptorSetLayoutWithVariant(
+        filament::Variant variant,
+        UserVariantFilterMask variantFilter,
+        bool isLit,
+        ReflectionMode reflectionMode,
+        RefractionMode refractionMode) {
+    if (filament::Variant::isValidDepthVariant(variant)) {
+        return descriptor_sets::getDepthVariantLayout();
+    }
+    if (filament::Variant::isSSRVariant(variant)) {
+        return descriptor_sets::getSsrVariantLayout();
+    }
+    // We need to filter out all the descriptors not included in the "resolved" layout below
+    return descriptor_sets::getPerViewDescriptorSetLayout(
+            MaterialDomain::SURFACE, variantFilter,
+            isLit, reflectionMode, refractionMode);
+}
+
 } // namespace filament

libs/filamat/src/shaders/ShaderGenerator.h

@@ -88,6 +88,13 @@ public:
             MaterialBuilder::FeatureLevel featureLevel,
             MaterialInfo const& material) noexcept;
 
+    static filament::backend::DescriptorSetLayout getPerViewDescriptorSetLayoutWithVariant(
+            filament::Variant variant,
+            filament::UserVariantFilterMask variantFilter,
+            bool isLit,
+            filament::ReflectionMode reflectionMode,
+            filament::RefractionMode refractionMode);
+
 private:
     static void generateVertexDomainDefines(utils::io::sstream& out,
             filament::VertexDomain domain) noexcept;

libs/gltfio/src/AssetLoader.cpp

@@ -50,6 +50,8 @@
 #include <utils/Log.h>
 #include <utils/Panic.h>
 #include <utils/NameComponentManager.h>
+
+#define SYSTRACE_TAG SYSTRACE_TAG_GLTFIO
 #include <utils/Systrace.h>
 
 #include <tsl/robin_map.h>

libs/gltfio/src/ResourceLoader.cpp

@@ -37,7 +37,10 @@
 #include <utils/compiler.h>
 #include <utils/JobSystem.h>
 #include <utils/Log.h>
+
+#define SYSTRACE_TAG SYSTRACE_TAG_GLTFIO
 #include <utils/Systrace.h>
+
 #include <utils/Path.h>
 
 #include <cgltf.h>

libs/gltfio/src/Utility.cpp

@@ -21,6 +21,8 @@
 #include "GltfEnums.h"
 
 #include <utils/Log.h>
+
+#define SYSTRACE_TAG SYSTRACE_TAG_GLTFIO
 #include <utils/Systrace.h>
 
 #define CGLTF_IMPLEMENTATION

libs/utils/include/utils/CString.h

@@ -128,7 +128,6 @@ public:
 
     CString& replace(size_type pos, size_type len, const CString& str) noexcept;
     CString& insert(size_type pos, const CString& str) noexcept { return replace(pos, 0, str); }
-    CString& append(const CString& str) noexcept { return insert(length(), str); }
 
     const_reference operator[](size_type pos) const noexcept {
         assert(pos < size());

libs/utils/include/utils/Systrace.h

@@ -17,24 +17,23 @@
 #ifndef TNT_UTILS_SYSTRACE_H
 #define TNT_UTILS_SYSTRACE_H
 
-
-#define SYSTRACE_TAG_NEVER          (0)
-#define SYSTRACE_TAG_ALWAYS         (1<<0)
-#define SYSTRACE_TAG_FILAMENT       (1<<1)  // don't change, used in makefiles
-#define SYSTRACE_TAG_JOBSYSTEM      (1<<2)
+#define SYSTRACE_TAG_DISABLED       (0)
+#define SYSTRACE_TAG_FILAMENT       (2) // don't change used in makefiles
+#define SYSTRACE_TAG_JOBSYSTEM      (3)
+#define SYSTRACE_TAG_GLTFIO         (4)
 
 /*
- * The SYSTRACE_ macros use SYSTRACE_TAG as a the TAG, which should be defined
- * before this file is included. If not, the SYSTRACE_TAG_ALWAYS tag will be used.
+ * The SYSTRACE_ macros use SYSTRACE_TAG as a category, which must be defined
+ * before this file is included.
  */
 
 #ifndef SYSTRACE_TAG
-#define SYSTRACE_TAG (SYSTRACE_TAG_ALWAYS)
+#   error SYSTRACE_TAG must be set to SYSTRACE_TAG_{DISABLED|FILAMENT|JOBSYSTEM}
 #endif
 
 // Systrace on Apple platforms is fragile and adds overhead, should only be enabled in dev builds.
 #ifndef FILAMENT_APPLE_SYSTRACE
-#define FILAMENT_APPLE_SYSTRACE 0
+#   define FILAMENT_APPLE_SYSTRACE 0
 #endif
 
 #if defined(__ANDROID__)
@@ -44,7 +43,6 @@
 #else
 
 #define SYSTRACE_ENABLE()
-#define SYSTRACE_DISABLE()
 #define SYSTRACE_CONTEXT()
 #define SYSTRACE_NAME(name)
 #define SYSTRACE_FRAME_ID(frame)
@@ -56,6 +54,6 @@
 #define SYSTRACE_VALUE32(name, val)
 #define SYSTRACE_VALUE64(name, val)
 
-#endif // ANDROID
+#endif
 
 #endif // TNT_UTILS_SYSTRACE_H

libs/utils/include/utils/android/Systrace.h

@@ -17,226 +17,75 @@
 #ifndef TNT_UTILS_ANDROID_SYSTRACE_H
 #define TNT_UTILS_ANDROID_SYSTRACE_H
 
-#include <atomic>
+#include <perfetto/perfetto.h>
 
 #include <stdint.h>
-#include <stdio.h>
-#include <unistd.h>
 
-#include <utils/compiler.h>
+PERFETTO_DEFINE_CATEGORIES_IN_NAMESPACE(systrace,
+        perfetto::Category("filament"),
+        perfetto::Category("jobsystem"),
+        perfetto::Category("gltfio"));
 
-// enable tracing
-#define SYSTRACE_ENABLE() ::utils::details::Systrace::enable(SYSTRACE_TAG)
+PERFETTO_USE_CATEGORIES_FROM_NAMESPACE(systrace);
 
-// disable tracing
-#define SYSTRACE_DISABLE() ::utils::details::Systrace::disable(SYSTRACE_TAG)
+#if SYSTRACE_TAG == SYSTRACE_TAG_FILAMENT
+#   define UTILS_PERFETTO_CATEGORY "filament"
+#elif SYSTRACE_TAG == SYSTRACE_TAG_JOBSYSTEM
+#   define UTILS_PERFETTO_CATEGORY "jobsystem"
+#elif SYSTRACE_TAG == SYSTRACE_TAG_GLTFIO
+#   define UTILS_PERFETTO_CATEGORY "gltfio"
+#endif
 
+#if SYSTRACE_TAG == SYSTRACE_TAG_DISABLED
 
-/**
- * Creates a Systrace context in the current scope. needed for calling all other systrace
- * commands below.
- */
-#define SYSTRACE_CONTEXT() ::utils::details::Systrace ___trctx(SYSTRACE_TAG)
+#define SYSTRACE_ENABLE()
+#define SYSTRACE_CONTEXT()
+#define SYSTRACE_NAME(name)
+#define SYSTRACE_FRAME_ID(frame)
+#define SYSTRACE_NAME_BEGIN(name)
+#define SYSTRACE_NAME_END()
+#define SYSTRACE_CALL()
+#define SYSTRACE_ASYNC_BEGIN(name, cookie)
+#define SYSTRACE_ASYNC_END(name, cookie)
+#define SYSTRACE_VALUE32(name, val)
+#define SYSTRACE_VALUE64(name, val)
 
+#else
 
-// SYSTRACE_NAME traces the beginning and end of the current scope.  To trace
-// the correct start and end times this macro should be declared first in the
-// scope body.
-// It also automatically creates a Systrace context
-#define SYSTRACE_NAME(name) ::utils::details::ScopedTrace ___tracer(SYSTRACE_TAG, name)
+#define SYSTRACE_ENABLE()
+#define SYSTRACE_CONTEXT()
 
-// Denotes that a new frame has started processing.
-#define SYSTRACE_FRAME_ID(frame) \
-    { /* scope for frame id trace */ \
-        char buf[64]; \
-        snprintf(buf, 64, "frame %u", frame); \
-        SYSTRACE_NAME(buf); \
-    }
+#define SYSTRACE_CALL() \
+    auto constexpr FILAMENT_SYSTRACE_FUNCTION = perfetto::StaticString(__FUNCTION__); \
+    TRACE_EVENT(UTILS_PERFETTO_CATEGORY, FILAMENT_SYSTRACE_FUNCTION)
 
-// SYSTRACE_CALL is an SYSTRACE_NAME that uses the current function name.
-#define SYSTRACE_CALL() SYSTRACE_NAME(__FUNCTION__)
+#define SYSTRACE_NAME(name) TRACE_EVENT(UTILS_PERFETTO_CATEGORY, nullptr,   \
+        [&](perfetto::EventContext ctx) {                                   \
+            ctx.event()->set_name(name);                                    \
+        })
 
-#define SYSTRACE_NAME_BEGIN(name) \
-        ___trctx.traceBegin(SYSTRACE_TAG, name)
+#define SYSTRACE_NAME_BEGIN(name) TRACE_EVENT_BEGIN(UTILS_PERFETTO_CATEGORY, nullptr,   \
+        [&](perfetto::EventContext ctx) {                                               \
+            ctx.event()->set_name(name);                                                \
+        })
 
-#define SYSTRACE_NAME_END() \
-        ___trctx.traceEnd(SYSTRACE_TAG)
+#define SYSTRACE_NAME_END() TRACE_EVENT_END(UTILS_PERFETTO_CATEGORY)
 
-
-/**
- * Trace the beginning of an asynchronous event. Unlike ATRACE_BEGIN/ATRACE_END
- * contexts, asynchronous events do not need to be nested. The name describes
- * the event, and the cookie provides a unique identifier for distinguishing
- * simultaneous events. The name and cookie used to begin an event must be
- * used to end it.
- */
 #define SYSTRACE_ASYNC_BEGIN(name, cookie) \
-        ___trctx.asyncBegin(SYSTRACE_TAG, name, cookie)
+        TRACE_EVENT_BEGIN(UTILS_PERFETTO_CATEGORY, name, perfetto::Track(cookie))
 
-/**
- * Trace the end of an asynchronous event.
- * This should have a corresponding SYSTRACE_ASYNC_BEGIN.
- */
 #define SYSTRACE_ASYNC_END(name, cookie) \
-        ___trctx.asyncEnd(SYSTRACE_TAG, name, cookie)
+        TRACE_EVENT_END(UTILS_PERFETTO_CATEGORY, perfetto::Track(cookie))
+
+#define SYSTRACE_FRAME_ID(frame) \
+    TRACE_EVENT_INSTANT(UTILS_PERFETTO_CATEGORY, "frame", "id", frame)
 
-/**
- * Traces an integer counter value.  name is used to identify the counter.
- * This can be used to track how a value changes over time.
- */
 #define SYSTRACE_VALUE32(name, val) \
-        ___trctx.value(SYSTRACE_TAG, name, int32_t(val))
+    TRACE_COUNTER(UTILS_PERFETTO_CATEGORY, name, val)
 
 #define SYSTRACE_VALUE64(name, val) \
-        ___trctx.value(SYSTRACE_TAG, name, int64_t(val))
+    TRACE_COUNTER(UTILS_PERFETTO_CATEGORY, name, val)
 
-// ------------------------------------------------------------------------------------------------
-// No user serviceable code below...
-// ------------------------------------------------------------------------------------------------
-
-namespace utils {
-namespace details {
-
-class UTILS_PUBLIC Systrace {
-   public:
-
-    enum tags {
-        NEVER       = SYSTRACE_TAG_NEVER,
-        ALWAYS      = SYSTRACE_TAG_ALWAYS,
-        FILAMENT    = SYSTRACE_TAG_FILAMENT,
-        JOBSYSTEM   = SYSTRACE_TAG_JOBSYSTEM
-        // we could define more TAGS here, as we need them.
-    };
-
-    explicit Systrace(uint32_t tag) noexcept {
-        if (tag) init(tag);
-    }
-
-    static void enable(uint32_t tags) noexcept;
-    static void disable(uint32_t tags) noexcept;
-
-
-    inline void traceBegin(uint32_t tag, const char* name) noexcept {
-        if (tag && UTILS_UNLIKELY(mIsTracingEnabled)) {
-            beginSection(this, name);
-        }
-    }
-
-    inline void traceEnd(uint32_t tag) noexcept {
-        if (tag && UTILS_UNLIKELY(mIsTracingEnabled)) {
-            endSection(this);
-        }
-    }
-
-    inline void asyncBegin(uint32_t tag, const char* name, int32_t cookie) noexcept {
-        if (tag && UTILS_UNLIKELY(mIsTracingEnabled)) {
-            beginAsyncSection(this, name, cookie);
-        }
-    }
-
-    inline void asyncEnd(uint32_t tag, const char* name, int32_t cookie) noexcept {
-        if (tag && UTILS_UNLIKELY(mIsTracingEnabled)) {
-            endAsyncSection(this, name, cookie);
-        }
-    }
-
-    inline void value(uint32_t tag, const char* name, int32_t value) noexcept {
-        if (tag && UTILS_UNLIKELY(mIsTracingEnabled)) {
-            setCounter(this, name, value);
-        }
-    }
-
-    inline void value(uint32_t tag, const char* name, int64_t value) noexcept {
-        if (tag && UTILS_UNLIKELY(mIsTracingEnabled)) {
-            setCounter(this, name, value);
-        }
-    }
-
-   private:
-    friend class ScopedTrace;
-
-    // whether tracing is supported at all by the platform
-
-    using ATrace_isEnabled_t          = bool (*)();
-    using ATrace_beginSection_t       = void (*)(const char* sectionName);
-    using ATrace_endSection_t         = void (*)();
-    using ATrace_beginAsyncSection_t  = void (*)(const char* sectionName, int32_t cookie);
-    using ATrace_endAsyncSection_t    = void (*)(const char* sectionName, int32_t cookie);
-    using ATrace_setCounter_t         = void (*)(const char* counterName, int64_t counterValue);
-
-    struct GlobalState {
-        bool isTracingAvailable;
-        std::atomic<uint32_t> isTracingEnabled;
-        int markerFd;
-
-        ATrace_isEnabled_t ATrace_isEnabled;
-        ATrace_beginSection_t ATrace_beginSection;
-        ATrace_endSection_t ATrace_endSection;
-        ATrace_beginAsyncSection_t ATrace_beginAsyncSection;
-        ATrace_endAsyncSection_t ATrace_endAsyncSection;
-        ATrace_setCounter_t ATrace_setCounter;
-
-        void (*beginSection)(Systrace* that, const char* name);
-        void (*endSection)(Systrace* that);
-        void (*beginAsyncSection)(Systrace* that, const char* name, int32_t cookie);
-        void (*endAsyncSection)(Systrace* that, const char* name, int32_t cookie);
-        void (*setCounter)(Systrace* that, const char* name, int64_t value);
-    };
-
-    static GlobalState sGlobalState;
-
-
-    // per-instance versions for better performance
-    ATrace_isEnabled_t ATrace_isEnabled;
-    ATrace_beginSection_t ATrace_beginSection;
-    ATrace_endSection_t ATrace_endSection;
-    ATrace_beginAsyncSection_t ATrace_beginAsyncSection;
-    ATrace_endAsyncSection_t ATrace_endAsyncSection;
-    ATrace_setCounter_t ATrace_setCounter;
-
-    void (*beginSection)(Systrace* that, const char* name);
-    void (*endSection)(Systrace* that);
-    void (*beginAsyncSection)(Systrace* that, const char* name, int32_t cookie);
-    void (*endAsyncSection)(Systrace* that, const char* name, int32_t cookie);
-    void (*setCounter)(Systrace* that, const char* name, int64_t value);
-
-    void init(uint32_t tag) noexcept;
-
-    // cached values for faster access, no need to be initialized
-    bool mIsTracingEnabled;
-    int mMarkerFd = -1;
-    pid_t mPid;
-
-    static void setup() noexcept;
-    static void init_once() noexcept;
-    static bool isTracingEnabled(uint32_t tag) noexcept;
-
-    static void begin_body(int fd, int pid, const char* name) noexcept;
-    static void end_body(int fd, int pid) noexcept;
-    static void async_begin_body(int fd, int pid, const char* name, int32_t cookie) noexcept;
-    static void async_end_body(int fd, int pid, const char* name, int32_t cookie) noexcept;
-    static void int64_body(int fd, int pid, const char* name, int64_t value) noexcept;
-};
-
-// ------------------------------------------------------------------------------------------------
-
-class UTILS_PUBLIC ScopedTrace {
-public:
-    // we don't inline this because it's relatively heavy due to a global check
-    ScopedTrace(uint32_t tag, const char* name) noexcept: mTrace(tag), mTag(tag) {
-        mTrace.traceBegin(tag, name);
-    }
-
-    inline ~ScopedTrace() noexcept {
-        mTrace.traceEnd(mTag);
-    }
-
-private:
-    Systrace mTrace;
-    const uint32_t mTag;
-};
-
-} // namespace details
-} // namespace utils
+#endif // SYSTRACE_TAG == SYSTRACE_TAG_DISABLED
 
 #endif // TNT_UTILS_ANDROID_SYSTRACE_H

libs/utils/include/utils/darwin/Systrace.h

@@ -29,13 +29,25 @@
 #include <utils/compiler.h>
 #include <stack>
 
+#if SYSTRACE_TAG == SYSTRACE_TAG_DISABLED
+
+#define SYSTRACE_ENABLE()
+#define SYSTRACE_CONTEXT()
+#define SYSTRACE_NAME(name)
+#define SYSTRACE_FRAME_ID(frame)
+#define SYSTRACE_NAME_BEGIN(name)
+#define SYSTRACE_NAME_END()
+#define SYSTRACE_CALL()
+#define SYSTRACE_ASYNC_BEGIN(name, cookie)
+#define SYSTRACE_ASYNC_END(name, cookie)
+#define SYSTRACE_VALUE32(name, val)
+#define SYSTRACE_VALUE64(name, val)
+
+#else
+
 // enable tracing
 #define SYSTRACE_ENABLE() ::utils::details::Systrace::enable(SYSTRACE_TAG)
 
-// disable tracing
-#define SYSTRACE_DISABLE() ::utils::details::Systrace::disable(SYSTRACE_TAG)
-
-
 /**
  * Creates a Systrace context in the current scope. needed for calling all other systrace
  * commands below.
@@ -93,6 +105,8 @@ extern thread_local std::stack<const char*> ___tracerSections;
 #define SYSTRACE_VALUE64(name, val) \
         ___tracer.value(SYSTRACE_TAG, name, int64_t(val))
 
+#endif // SYSTRACE_TAG == SYSTRACE_TAG_DISABLED
+
 // ------------------------------------------------------------------------------------------------
 // No user serviceable code below...
 // ------------------------------------------------------------------------------------------------
@@ -118,50 +132,40 @@ namespace utils {
 namespace details {
 
 class Systrace {
-   public:
-
-    enum tags {
-        NEVER       = SYSTRACE_TAG_NEVER,
-        ALWAYS      = SYSTRACE_TAG_ALWAYS,
-        FILAMENT    = SYSTRACE_TAG_FILAMENT,
-        JOBSYSTEM   = SYSTRACE_TAG_JOBSYSTEM
-        // we could define more TAGS here, as we need them.
-    };
-
+public:
     explicit Systrace(uint32_t tag) noexcept {
         if (tag) init(tag);
     }
 
-    static void enable(uint32_t tags) noexcept;
-    static void disable(uint32_t tags) noexcept;
+    static void enable(uint32_t tag) noexcept;
 
-    inline void traceBegin(uint32_t tag, const char* name) noexcept {
+    void traceBegin(uint32_t tag, const char* name) noexcept {
         if (tag && UTILS_UNLIKELY(mIsTracingEnabled)) {
             APPLE_SIGNPOST_EMIT(sGlobalState.systraceLog, OS_SIGNPOST_INTERVAL_BEGIN,
                     OS_SIGNPOST_ID_EXCLUSIVE, name, name)
         }
     }
 
-    inline void traceEnd(uint32_t tag, const char* name) noexcept {
+    void traceEnd(uint32_t tag, const char* name) noexcept {
         if (tag && UTILS_UNLIKELY(mIsTracingEnabled)) {
             APPLE_SIGNPOST_EMIT(sGlobalState.systraceLog, OS_SIGNPOST_INTERVAL_END,
                     OS_SIGNPOST_ID_EXCLUSIVE, name, "")
         }
     }
 
-    inline void asyncBegin(uint32_t tag, const char* name, int32_t cookie) noexcept {
+    void asyncBegin(uint32_t tag, const char* name, int32_t cookie) noexcept {
         if (tag && UTILS_UNLIKELY(mIsTracingEnabled)) {
             // TODO
         }
     }
 
-    inline void asyncEnd(uint32_t tag, const char* name, int32_t cookie) noexcept {
+    void asyncEnd(uint32_t tag, const char* name, int32_t cookie) noexcept {
         if (tag && UTILS_UNLIKELY(mIsTracingEnabled)) {
             // TODO
         }
     }
 
-    inline void value(uint32_t tag, const char* name, int32_t value) noexcept {
+    void value(uint32_t tag, const char* name, int32_t value) noexcept {
         if (tag && UTILS_UNLIKELY(mIsTracingEnabled)) {
             char buf[64];
             snprintf(buf, 64, "%s - %d", name, value);
@@ -170,7 +174,7 @@ class Systrace {
         }
     }
 
-    inline void value(uint32_t tag, const char* name, int64_t value) noexcept {
+    void value(uint32_t tag, const char* name, int64_t value) noexcept {
         if (tag && UTILS_UNLIKELY(mIsTracingEnabled)) {
             char buf[64];
             snprintf(buf, 64, "%s - %lld", name, value);
@@ -179,16 +183,16 @@ class Systrace {
         }
     }
 
-    inline void frameId(uint32_t tag, uint32_t frame) noexcept {
+    void frameId(uint32_t tag, uint32_t frame) noexcept {
         if (tag && UTILS_UNLIKELY(mIsTracingEnabled)) {
-            char buf[64]; \
-            snprintf(buf, 64, "frame %u", frame); \
+            char buf[64];
+            snprintf(buf, 64, "frame %u", frame);
             APPLE_SIGNPOST_EMIT(sGlobalState.frameIdLog, OS_SIGNPOST_EVENT,
                     OS_SIGNPOST_ID_EXCLUSIVE, "frame", buf)
         }
     }
 
-   private:
+private:
     friend class ScopedTrace;
 
     struct GlobalState {
@@ -213,25 +217,25 @@ class Systrace {
 // ------------------------------------------------------------------------------------------------
 
 class ScopedTrace {
-   public:
+public:
     // we don't inline this because it's relatively heavy due to a global check
     ScopedTrace(uint32_t tag, const char* name) noexcept : mTrace(tag), mName(name), mTag(tag) {
         mTrace.traceBegin(tag, name);
     }
 
-    inline ~ScopedTrace() noexcept {
+    ~ScopedTrace() noexcept {
         mTrace.traceEnd(mTag, mName);
     }
 
-    inline void value(uint32_t tag, const char* name, int32_t v) noexcept {
+    void value(uint32_t tag, const char* name, int32_t v) noexcept {
         mTrace.value(tag, name, v);
     }
 
-    inline void value(uint32_t tag, const char* name, int64_t v) noexcept {
+    void value(uint32_t tag, const char* name, int64_t v) noexcept {
         mTrace.value(tag, name, v);
     }
 
-   private:
+private:
     Systrace mTrace;
     const char* mName;
     const uint32_t mTag;

libs/utils/src/JobSystem.cpp

@@ -15,10 +15,8 @@
  */
 
 // Note: The overhead of SYSTRACE_TAG_JOBSYSTEM is not negligible especially with parallel_for().
-#ifndef SYSTRACE_TAG
+#define SYSTRACE_TAG SYSTRACE_TAG_DISABLED
 //#define SYSTRACE_TAG SYSTRACE_TAG_JOBSYSTEM
-#define SYSTRACE_TAG SYSTRACE_TAG_NEVER
-#endif
 
 // when SYSTRACE_TAG_JOBSYSTEM is used, enables even heavier systraces
 #define HEAVY_SYSTRACE  0

libs/utils/src/android/Systrace.cpp

@@ -14,206 +14,26 @@
  * limitations under the License.
  */
 
-#include <utils/Systrace.h>
-#include <utils/Log.h>
+#include <utils/compiler.h>
+#include <utils/android/Systrace.h>
 
-#include <cinttypes>
+#include <perfetto/perfetto.h>
 
-#include <string.h>
+PERFETTO_TRACK_EVENT_STATIC_STORAGE_IN_NAMESPACE(systrace);
 
-#include <errno.h>
-#include <fcntl.h>
-#include <pthread.h>
-#include <dlfcn.h>
+namespace {
 
-namespace utils {
-namespace details {
-
-static pthread_once_t atrace_once_control = PTHREAD_ONCE_INIT;
-
-template <typename T>
-static void loadSymbol(T*& pfn, const char *symbol) noexcept {
-    pfn = (T*)dlsym(RTLD_DEFAULT, symbol);
-}
-
-Systrace::GlobalState Systrace::sGlobalState = {};
-
-void Systrace::init_once() noexcept {
-    GlobalState& s = sGlobalState;
-
-    s.markerFd = -1;
-
-    // API 23
-    loadSymbol(s.ATrace_isEnabled, "ATrace_isEnabled");
-    loadSymbol(s.ATrace_beginSection, "ATrace_beginSection");
-    loadSymbol(s.ATrace_endSection, "ATrace_endSection");
-    // API 29
-    loadSymbol(s.ATrace_beginAsyncSection, "ATrace_beginAsyncSection");
-    loadSymbol(s.ATrace_endAsyncSection, "ATrace_endAsyncSection");
-    loadSymbol(s.ATrace_setCounter, "ATrace_setCounter");
-
-
-    const bool hasBasicAtrace = s.ATrace_isEnabled &&
-                                s.ATrace_beginSection &&
-                                s.ATrace_endSection;
-
-    const bool hasFullATrace = hasBasicAtrace &&
-                               s.ATrace_beginAsyncSection &&
-                               s.ATrace_endAsyncSection &&
-                               s.ATrace_setCounter;
-
-    if (!hasFullATrace) {
-        s.markerFd = open("/sys/kernel/debug/tracing/trace_marker", O_WRONLY | O_CLOEXEC);
+class SystraceStaticInitialization {
+public:
+    SystraceStaticInitialization() {
+        perfetto::TracingInitArgs args;
+        args.backends |= perfetto::kSystemBackend;
+        perfetto::Tracing::Initialize(args);
+        systrace::TrackEvent::Register();
     }
+};
 
-    if (hasBasicAtrace && !hasFullATrace) {
-        // no-op if we don't have all these
-        s.ATrace_beginAsyncSection = [](const char* sectionName, int32_t cookie){};
-        s.ATrace_endAsyncSection = [](const char* sectionName, int32_t cookie){};
-        s.ATrace_setCounter = [](const char* sectionName, int64_t counterValue){};
-    }
+UTILS_UNUSED SystraceStaticInitialization sSystraceStaticInitialization{};
 
-    const bool hasLegacySystrace = s.markerFd != -1;
-
-    if (hasLegacySystrace && !hasFullATrace) {
-        // use legacy
-        s.beginSection = [](Systrace* that, const char* name) {
-            begin_body(that->mMarkerFd, that->mPid, name);
-        };
-        s.endSection = [](Systrace* that) {
-            end_body(that->mMarkerFd, that->mPid);
-        };
-        s.beginAsyncSection = [](Systrace* that, const char* name, int32_t cookie) {
-            async_begin_body(that->mMarkerFd, that->mPid, name, cookie);
-        };
-        s.endAsyncSection = [](Systrace* that, const char* name, int32_t cookie) {
-            async_end_body(that->mMarkerFd, that->mPid, name, cookie);
-        };
-        s.setCounter = [](Systrace* that, const char* name, int64_t value) {
-            int64_body(that->mMarkerFd, that->mPid, name, value);
-        };
-    } else if (hasBasicAtrace) {
-        // we have at least basic ATrace
-        s.beginSection = [](Systrace* that, const char* name) {
-            that->ATrace_beginSection(name);
-        };
-        s.endSection = [](Systrace* that) {
-            that->ATrace_endSection();
-        };
-        s.beginAsyncSection = [](Systrace* that, const char* name, int32_t cookie) {
-            that->ATrace_beginAsyncSection(name, cookie);
-        };
-        s.endAsyncSection = [](Systrace* that, const char* name, int32_t cookie) {
-            that->ATrace_endAsyncSection(name, cookie);
-        };
-        s.setCounter = [](Systrace* that, const char* name, int64_t value) {
-            that->ATrace_setCounter(name, value);
-        };
-    }
-
-    s.isTracingAvailable = hasLegacySystrace || hasFullATrace || hasBasicAtrace;
 }
 
-void Systrace::setup() noexcept {
-    pthread_once(&atrace_once_control, init_once);
-}
-
-void Systrace::enable(uint32_t tags) noexcept {
-    setup();
-    if (UTILS_LIKELY(sGlobalState.isTracingAvailable)) {
-        sGlobalState.isTracingEnabled.fetch_or(tags, std::memory_order_relaxed);
-    }
-}
-
-void Systrace::disable(uint32_t tags) noexcept {
-    sGlobalState.isTracingEnabled.fetch_and(~tags, std::memory_order_relaxed);
-}
-
-// unfortunately, this generates quite a bit of code because reading a global is not
-// trivial. For this reason, we do not inline this method.
-bool Systrace::isTracingEnabled(uint32_t tag) noexcept {
-    if (tag) {
-        setup();
-        return bool((sGlobalState.isTracingEnabled.load(std::memory_order_relaxed) | SYSTRACE_TAG_ALWAYS) & tag);
-    }
-    return false;
-}
-
-// ------------------------------------------------------------------------------------------------
-
-void Systrace::init(uint32_t tag) noexcept {
-    // must be called first
-    mIsTracingEnabled = isTracingEnabled(tag);
-
-    // cache static variables for better efficiency
-    GlobalState& s = sGlobalState;
-    ATrace_isEnabled         = s.ATrace_isEnabled;
-    ATrace_beginSection      = s.ATrace_beginSection;
-    ATrace_endSection        = s.ATrace_endSection;
-    ATrace_beginAsyncSection = s.ATrace_beginAsyncSection;
-    ATrace_endAsyncSection   = s.ATrace_endAsyncSection;
-    ATrace_setCounter        = s.ATrace_setCounter;
-
-    beginSection = s.beginSection;
-    endSection = s.endSection;
-    beginAsyncSection = s.beginAsyncSection;
-    endAsyncSection = s.endAsyncSection;
-    setCounter = s.setCounter;
-
-    mMarkerFd = s.markerFd;
-
-    mPid = getpid();
-}
-
-// ------------------------------------------------------------------------------------------------
-
-/**
- * Maximum size of a message that can be logged to the trace buffer.
- * Note this message includes a tag, the pid, and the string given as the name.
- * Names should be kept short to get the most use of the trace buffer.
- */
-#define ATRACE_MESSAGE_LENGTH 512
-
-#define WRITE_MSG(format_begin, format_end, pid, name, value) {                 \
-    char buf[ATRACE_MESSAGE_LENGTH];                                            \
-    int len = snprintf(buf, sizeof(buf), format_begin "%s" format_end, pid,     \
-        name, value);                                                           \
-    if (len >= (int) sizeof(buf)) {                                             \
-        /* Given the sizeof(buf), and all of the current format buffers,        \
-         * it is impossible for name_len to be < 0 if len >= sizeof(buf). */    \
-        int name_len = strlen(name) - (len - sizeof(buf)) - 1;                  \
-        /* Truncate the name to make the message fit. */                        \
-        len = snprintf(buf, sizeof(buf), format_begin "%.*s" format_end, pid,   \
-            name_len, name, value);                                             \
-    }                                                                           \
-    write(fd, buf, len);                                                        \
-}
-
-void Systrace::begin_body(int fd, int pid, const char* name) noexcept {
-    char buf[ATRACE_MESSAGE_LENGTH];
-    ssize_t len = snprintf(buf, sizeof(buf), "B|%d|%s", pid, name);
-    if (len >= sizeof(buf)) {
-        len = sizeof(buf) - 1;
-    }
-    write(fd, buf, size_t(len));
-}
-
-void Systrace::end_body(int fd, int pid) noexcept {
-    const char END_TAG = 'E';
-    write(fd, &END_TAG, 1);
-}
-
-void Systrace::async_begin_body(int fd, int pid, const char* name, int32_t cookie) noexcept {
-    WRITE_MSG("S|%d|", "|%" PRId32, pid, name, cookie);
-}
-
-void Systrace::async_end_body(int fd, int pid, const char* name, int32_t cookie) noexcept {
-    WRITE_MSG("F|%d|", "|%" PRId32, pid, name, cookie);
-}
-
-void Systrace::int64_body(int fd, int pid, const char* name, int64_t value) noexcept {
-    WRITE_MSG("C|%d|", "|%" PRId64, pid, name, value);
-}
-
-} // namespace details
-} // namespace utils

libs/utils/src/darwin/Systrace.cpp

@@ -14,11 +14,17 @@
  * limitations under the License.
  */
 
-#include <utils/Systrace.h>
-#include <utils/Log.h>
+#include <utils/darwin/Systrace.h>
+
+#ifndef FILAMENT_APPLE_SYSTRACE
+#   define FILAMENT_APPLE_SYSTRACE 0
+#endif
 
 #if FILAMENT_APPLE_SYSTRACE
 
+#include <atomic>
+#include <stack>
+#include <stdint.h>
 #include <pthread.h>
 
 static pthread_once_t atrace_once_control = PTHREAD_ONCE_INIT;
@@ -41,21 +47,24 @@ void Systrace::setup() noexcept {
     pthread_once(&atrace_once_control, init_once);
 }
 
-void Systrace::enable(uint32_t tags) noexcept {
+void Systrace::enable(uint32_t tag) noexcept {
     setup();
-    sGlobalState.isTracingEnabled.fetch_or(tags, std::memory_order_relaxed);
+    uint32_t const mask = 1 << tag;
+    sGlobalState.isTracingEnabled.fetch_or(mask, std::memory_order_relaxed);
 }
 
-void Systrace::disable(uint32_t tags) noexcept {
-    sGlobalState.isTracingEnabled.fetch_and(~tags, std::memory_order_relaxed);
+void Systrace::disable(uint32_t tag) noexcept {
+    uint32_t const mask = 1 << tag;
+    sGlobalState.isTracingEnabled.fetch_and(~mask, std::memory_order_relaxed);
 }
 
-// unfortunately, this generates quite a bit of code because reading a global is not
+// Unfortunately, this generates quite a bit of code because reading a global is not
 // trivial. For this reason, we do not inline this method.
 bool Systrace::isTracingEnabled(uint32_t tag) noexcept {
     if (tag) {
         setup();
-        return bool((sGlobalState.isTracingEnabled.load(std::memory_order_relaxed) | SYSTRACE_TAG_ALWAYS) & tag);
+        uint32_t const mask = 1 << tag;
+        return bool(sGlobalState.isTracingEnabled.load(std::memory_order_relaxed) & mask);
     }
     return false;
 }