Testing stencilling 3

filament/backend/src/vulkan/VulkanDriver.cpp

@@ -606,7 +606,7 @@ void VulkanDriver::createRenderTargetR(Handle<HwRenderTarget> rth,
         }
     }
 
-    VulkanAttachment depthStencil[2] = {};
+    VulkanAttachment depthStencil;
     if (depth.handle) {
         depthStencil[0] = {
             .texture = mResourceAllocator.handle_cast<VulkanTexture*>(depth.handle),
@@ -621,19 +621,8 @@ void VulkanDriver::createRenderTargetR(Handle<HwRenderTarget> rth,
         attachmentCount++;
     }
 
-    if (stencil.handle) {
-        depthStencil[1] = {
-            .texture = mResourceAllocator.handle_cast<VulkanTexture*>(stencil.handle),
-            .level = stencil.level,
-            .baseViewIndex = stencil.baseViewIndex,
-            .layerCount = layerCount,
-            .layer = stencil.layer,
-        };
-        UTILS_UNUSED_IN_RELEASE VkExtent2D extent = depthStencil[1].getExtent2D();
-        tmin = { std::min(tmin.x, extent.width), std::min(tmin.y, extent.height) };
-        tmax = { std::max(tmax.x, extent.width), std::max(tmax.y, extent.height) };
-        attachmentCount++;
-    }
+    // The stencil buffer is always assumed to be part of the depth-stencil buffer.    
+    assert_invariant(!stencil.handle || stencil.handle == depth.handle);
 
     // All attachments must have the same dimensions, which must be greater than or equal to the
     // render target dimensions.

filament/backend/src/vulkan/VulkanHandles.cpp

@@ -314,7 +314,7 @@ void VulkanRenderTarget::bindToSwapChain(VulkanSwapChain& swapChain) {
     assert_invariant(!mOffscreen);
     VkExtent2D const extent = swapChain.getExtent();
     mColor[0] = { .texture = swapChain.getCurrentColor() };
-    mDepth = { .texture = swapChain.getDepth() };
+    mDepthStencil = { .texture = swapChain.getDepth() };
     width = extent.width;
     height = extent.height;
 }
@@ -323,7 +323,7 @@ VulkanRenderTarget::VulkanRenderTarget(VkDevice device, VkPhysicalDevice physica
         VulkanContext const& context, VmaAllocator allocator, VulkanCommands* commands,
         uint32_t width, uint32_t height, uint8_t samples,
         VulkanAttachment color[MRT::MAX_SUPPORTED_RENDER_TARGET_COUNT],
-        VulkanAttachment depthStencil[2], VulkanStagePool& stagePool, uint8_t layerCount)
+        VulkanAttachment depthStencil, VulkanStagePool& stagePool, uint8_t layerCount)
     : HwRenderTarget(width, height),
       VulkanResource(VulkanResourceType::RENDER_TARGET),
       mOffscreen(true),
@@ -332,8 +332,8 @@ VulkanRenderTarget::VulkanRenderTarget(VkDevice device, VkPhysicalDevice physica
     for (int index = 0; index < MRT::MAX_SUPPORTED_RENDER_TARGET_COUNT; index++) {
         mColor[index] = color[index];
     }
-    mDepth = depthStencil[0];
-    VulkanTexture* depthTexture = (VulkanTexture*) mDepth.texture;
+    mDepthStencil = depthStencil[0];
+    VulkanTexture* depthTexture = (VulkanTexture*) mDepthStencil.texture;
 
     if (samples == 1) {
         return;
@@ -372,7 +372,7 @@ VulkanRenderTarget::VulkanRenderTarget(VkDevice device, VkPhysicalDevice physica
 
     // There is no need for sidecar depth if the depth texture is already MSAA.
     if (depthTexture->samples > 1) {
-        mMsaaDepthAttachment = mDepth;
+        mMsaaDepthAttachment = mDepthStencil;
         return;
     }
 
@@ -392,7 +392,7 @@ VulkanRenderTarget::VulkanRenderTarget(VkDevice device, VkPhysicalDevice physica
     mMsaaDepthAttachment = {
         .texture = msTexture,
         .level = msLevel,
-        .layer = mDepth.layer,
+        .layer = mDepthStencil.layer,
     };
 }
 
@@ -418,8 +418,8 @@ VulkanAttachment& VulkanRenderTarget::getMsaaColor(int target) {
     return mMsaaAttachments[target];
 }
 
-VulkanAttachment& VulkanRenderTarget::getDepth() {
-    return mDepth;
+VulkanAttachment& VulkanRenderTarget::getDepthStencil() {
+    return mDepthStencil;
 }
 
 VulkanAttachment& VulkanRenderTarget::getMsaaDepth() {

filament/backend/src/vulkan/VulkanHandles.h

@@ -304,7 +304,7 @@ struct VulkanRenderTarget : private HwRenderTarget, VulkanResource {
             VulkanContext const& context, VmaAllocator allocator,
             VulkanCommands* commands, uint32_t width, uint32_t height,
             uint8_t samples, VulkanAttachment color[MRT::MAX_SUPPORTED_RENDER_TARGET_COUNT],
-            VulkanAttachment depthStencil[2], VulkanStagePool& stagePool, uint8_t layerCount);
+            VulkanAttachment depthStencil, VulkanStagePool& stagePool, uint8_t layerCount);
 
     // Creates a special "default" render target (i.e. associated with the swap chain)
     explicit VulkanRenderTarget();
@@ -326,7 +326,7 @@ struct VulkanRenderTarget : private HwRenderTarget, VulkanResource {
 
 private:
     VulkanAttachment mColor[MRT::MAX_SUPPORTED_RENDER_TARGET_COUNT] = {};
-    VulkanAttachment mDepth = {};
+    VulkanAttachment mDepthStencil = {};
     VulkanAttachment mMsaaAttachments[MRT::MAX_SUPPORTED_RENDER_TARGET_COUNT] = {};
     VulkanAttachment mMsaaDepthAttachment = {};
     const bool mOffscreen : 1;

samples/hellotriangle.cpp

@@ -20,6 +20,7 @@
 #include <filament/Material.h>
 #include <filament/MaterialInstance.h>
 #include <filament/RenderableManager.h>
+#include <filament/Renderer.h>
 #include <filament/Scene.h>
 #include <filament/Skybox.h>
 #include <filament/TransformManager.h>
@@ -46,23 +47,33 @@ using utils::EntityManager;
 struct App {
     Config config;
     VertexBuffer* vb;
+    VertexBuffer* vb2;
     IndexBuffer* ib;
     Material* mat;
     Camera* cam;
     Entity camera;
     Skybox* skybox;
     Entity renderable;
+    Entity r2;
 };
 
 struct Vertex {
-    filament::math::float2 position;
+    filament::math::float3 position;
     uint32_t color;
 };
 
+float const z = 5;
+
 static const Vertex TRIANGLE_VERTICES[3] = {
-    {{1, 0}, 0xffff0000u},
-    {{cos(M_PI * 2 / 3), sin(M_PI * 2 / 3)}, 0xff00ff00u},
-    {{cos(M_PI * 4 / 3), sin(M_PI * 4 / 3)}, 0xff0000ffu},
+    {{1, 0, z}, 0xffff0000u},
+    {{cos(M_PI * 2 / 3), sin(M_PI * 2 / 3), z}, 0xff00ff00u},
+    {{cos(M_PI * 4 / 3), sin(M_PI * 4 / 3), z}, 0xff0000ffu},
+};
+
+static Vertex T2[3] = {
+        TRIANGLE_VERTICES[0],
+        TRIANGLE_VERTICES[1],
+        TRIANGLE_VERTICES[2],
 };
 
 static constexpr uint16_t TRIANGLE_INDICES[3] = { 0, 1, 2 };
@@ -120,25 +131,36 @@ static int handleCommandLineArguments(int argc, char* argv[], App* app) {
 }
 
 int main(int argc, char** argv) {
+    T2[0].position.z = z - 10;
+    T2[1].position.z = z - 10;
+    T2[2].position.z = z - 10;
+
+    T2[0].color = 0xFF0000FF;
+    T2[1].color = 0xFF0000FF;
+    T2[2].color = 0xFF0000FF;
+
     App app{};
     app.config.title = "hellotriangle";
     app.config.featureLevel = backend::FeatureLevel::FEATURE_LEVEL_0;
     handleCommandLineArguments(argc, argv, &app);
 
     auto setup = [&app](Engine* engine, View* view, Scene* scene) {
-        app.skybox = Skybox::Builder().color({0.1, 0.125, 0.25, 1.0}).build(*engine);
-        scene->setSkybox(app.skybox);
         view->setPostProcessingEnabled(false);
-        static_assert(sizeof(Vertex) == 12, "Strange vertex size.");
-        app.vb = VertexBuffer::Builder()
+        view->setStencilBufferEnabled(true);
+
+        static_assert(sizeof(Vertex) == 16, "Strange vertex size.");
+        auto builder = VertexBuffer::Builder()
                 .vertexCount(3)
                 .bufferCount(1)
-                .attribute(VertexAttribute::POSITION, 0, VertexBuffer::AttributeType::FLOAT2, 0, 12)
-                .attribute(VertexAttribute::COLOR, 0, VertexBuffer::AttributeType::UBYTE4, 8, 12)
-                .normalized(VertexAttribute::COLOR)
-                .build(*engine);
+                .attribute(VertexAttribute::POSITION, 0, VertexBuffer::AttributeType::FLOAT3, 0, 16)
+                .attribute(VertexAttribute::COLOR, 0, VertexBuffer::AttributeType::UBYTE4, 12, 16)
+                .normalized(VertexAttribute::COLOR);
+        app.vb = builder.build(*engine);
+        app.vb2 = builder.build(*engine);
         app.vb->setBufferAt(*engine, 0,
-                VertexBuffer::BufferDescriptor(TRIANGLE_VERTICES, 36, nullptr));
+                VertexBuffer::BufferDescriptor(TRIANGLE_VERTICES, 48, nullptr));
+        app.vb2->setBufferAt(*engine, 0,
+                VertexBuffer::BufferDescriptor(T2, 48, nullptr));
         app.ib = IndexBuffer::Builder()
                 .indexCount(3)
                 .bufferType(IndexBuffer::IndexType::USHORT)
@@ -149,22 +171,67 @@ int main(int argc, char** argv) {
                 .package(RESOURCES_BAKEDCOLOR_DATA, RESOURCES_BAKEDCOLOR_SIZE)
                 .build(*engine);
         app.renderable = EntityManager::get().create();
+        app.r2 = EntityManager::get().create();
+
+        auto inst1 = app.mat->createInstance();
+        inst1->setDepthWrite(false);        
+        inst1->setDepthFunc(MaterialInstance::DepthFunc::A);        
+        inst1->setDepthCulling(false);
+        
+        inst1->setStencilWrite(true);
+        inst1->setStencilCompareFunction(MaterialInstance::StencilCompareFunc::E);
+        inst1->setStencilOpDepthStencilPass(MaterialInstance::StencilOperation::REPLACE);
+        inst1->setStencilReferenceValue(6);
+
+        auto inst2 = app.mat->createInstance();
+        inst2->setDepthWrite(false);
+        inst2->setDepthFunc(MaterialInstance::DepthFunc::A);
+        inst2->setDepthCulling(false);
+        
+        inst2->setStencilWrite(true);
+        inst2->setStencilCompareFunction(MaterialInstance::StencilCompareFunc::L);
+        inst2->setStencilOpDepthStencilPass(MaterialInstance::StencilOperation::REPLACE);
+        inst2->setStencilReferenceValue(6);
+
+
+        auto& renderableMan = engine->getRenderableManager();
+
         RenderableManager::Builder(1)
                 .boundingBox({{ -1, -1, -1 }, { 1, 1, 1 }})
-                .material(0, app.mat->getDefaultInstance())
+                .material(0, inst1)
                 .geometry(0, RenderableManager::PrimitiveType::TRIANGLES, app.vb, app.ib, 0, 3)
                 .culling(false)
                 .receiveShadows(false)
                 .castShadows(false)
                 .build(*engine, app.renderable);
+
+
+        RenderableManager::Builder(1)
+                .boundingBox({{ -1, -1, -1 }, { 1, 1, 1 }})
+                .material(0, inst2)
+                .geometry(0, RenderableManager::PrimitiveType::TRIANGLES, app.vb2, app.ib, 0, 3)
+                .culling(false)
+                .receiveShadows(false)
+                .castShadows(false)
+                .build(*engine, app.r2);
+
         scene->addEntity(app.renderable);
+
+
+        auto r1inst = renderableMan.getInstance(app.renderable);
+        renderableMan.setPriority(r1inst, 7);
+
+        scene->addEntity(app.r2);        
+        auto r2inst = renderableMan.getInstance(app.r2);
+        renderableMan.setPriority(r2inst, 6);
+
         app.camera = utils::EntityManager::get().create();
         app.cam = engine->createCamera(app.camera);
         view->setCamera(app.cam);
     };
 
     auto cleanup = [&app](Engine* engine, View*, Scene*) {
-        engine->destroy(app.skybox);
+//        engine->destroy(app.skybox);
         engine->destroy(app.renderable);
         engine->destroy(app.mat);
         engine->destroy(app.vb);
@@ -174,19 +241,24 @@ int main(int argc, char** argv) {
     };
 
     FilamentApp::get().animate([&app](Engine* engine, View* view, double now) {
-        constexpr float ZOOM = 1.5f;
+        constexpr float ZOOM = 1.5;
         const uint32_t w = view->getViewport().width;
         const uint32_t h = view->getViewport().height;
         const float aspect = (float) w / h;
         app.cam->setProjection(Camera::Projection::ORTHO,
             -aspect * ZOOM, aspect * ZOOM,
-            -ZOOM, ZOOM, 0, 1);
+            -ZOOM, ZOOM, -100, 100);
         auto& tcm = engine->getTransformManager();
         tcm.setTransform(tcm.getInstance(app.renderable),
                 filament::math::mat4f::rotation(now, filament::math::float3{ 0, 0, 1 }));
     });
 
-    FilamentApp::get().run(app.config, setup, cleanup);
+
+    auto preRender = [](Engine*, View* view, Scene*, Renderer* renderer) {
+        renderer->setClearOptions({ .clearStencil = 0u, .clear = true });
+    };
+
+    FilamentApp::get().run(app.config, setup, cleanup, {}, preRender);
 
     return 0;
 }