Added RingBuffer mechanism to gpu lib

libraries/gpu/src/gpu/Batch.cpp

@@ -320,6 +320,14 @@ void Batch::setResourceTexture(uint32 slot, const TextureView& view) {
     setResourceTexture(slot, view._texture);
 }
 
+void Batch::setResourceFramebufferRingTexture(uint32 slot, const FramebufferRingPointer& framebuffer, unsigned int ringIndex) {
+    ADD_COMMAND(setResourceFramebufferRingTexture);
+
+    _params.emplace_back(_ringbuffers.cache(framebuffer));
+    _params.emplace_back(slot);
+    _params.emplace_back(ringIndex);
+}
+
 void Batch::setFramebuffer(const FramebufferPointer& framebuffer) {
     ADD_COMMAND(setFramebuffer);
 
@@ -327,6 +335,19 @@ void Batch::setFramebuffer(const FramebufferPointer& framebuffer) {
 
 }
 
+void Batch::setFramebufferRing(const FramebufferRingPointer& framebuffer, unsigned int ringIndex) {
+    ADD_COMMAND(setFramebufferRing);
+
+    _params.emplace_back(_ringbuffers.cache(framebuffer));
+    _params.emplace_back(ringIndex);
+}
+
+void Batch::advance(const RingBufferPointer& ringbuffer) {
+    ADD_COMMAND(advance);
+
+    _params.emplace_back(_ringbuffers.cache(ringbuffer));
+}
+
 void Batch::clearFramebuffer(Framebuffer::Masks targets, const Vec4& color, float depth, int stencil, bool enableScissor) {
     ADD_COMMAND(clearFramebuffer);
 

libraries/gpu/src/gpu/Batch.h

@@ -187,11 +187,14 @@ public:
 
     void setResourceTexture(uint32 slot, const TexturePointer& texture);
     void setResourceTexture(uint32 slot, const TextureView& view); // not a command, just a shortcut from a TextureView
-
+    void setResourceFramebufferRingTexture(uint32 slot, const FramebufferRingPointer& framebuffer, unsigned int ringIndex); // not a command, just a shortcut from a TextureView
 
     // Ouput Stage
     void setFramebuffer(const FramebufferPointer& framebuffer);
- 
+    void setFramebufferRing(const FramebufferRingPointer& framebuffer, unsigned int ringIndex);
+
+    void advance(const RingBufferPointer& ringbuffer);
+
     // Clear framebuffer layers
     // Targets can be any of the render buffers contained in the currnetly bound Framebuffer
     // Optionally the scissor test can be enabled locally for this command and to restrict the clearing command to the pixels contained in the scissor rectangle
@@ -299,12 +302,16 @@ public:
         COMMAND_setUniformBuffer,
         COMMAND_setResourceBuffer,
         COMMAND_setResourceTexture,
+        COMMAND_setResourceFramebufferRingTexture,
 
         COMMAND_setFramebuffer,
+        COMMAND_setFramebufferRing,
         COMMAND_clearFramebuffer,
         COMMAND_blit,
         COMMAND_generateTextureMips,
 
+        COMMAND_advance,
+
         COMMAND_beginQuery,
         COMMAND_endQuery,
         COMMAND_getQuery,
@@ -421,6 +428,7 @@ public:
     typedef Cache<Transform>::Vector TransformCaches;
     typedef Cache<PipelinePointer>::Vector PipelineCaches;
     typedef Cache<FramebufferPointer>::Vector FramebufferCaches;
+    typedef Cache<RingBufferPointer>::Vector RingBufferCaches;
     typedef Cache<QueryPointer>::Vector QueryCaches;
     typedef Cache<std::string>::Vector StringCaches;
     typedef Cache<std::function<void()>>::Vector LambdaCache;
@@ -475,6 +483,7 @@ public:
     TransformCaches _transforms;
     PipelineCaches _pipelines;
     FramebufferCaches _framebuffers;
+    RingBufferCaches _ringbuffers;
     QueryCaches _queries;
     LambdaCache _lambdas;
     StringCaches _profileRanges;

libraries/gpu/src/gpu/Framebuffer.h

@@ -12,6 +12,7 @@
 #define hifi_gpu_Framebuffer_h
 
 #include "Texture.h"
+#include "ResourceRing.h"
 #include <memory>
 
 class Transform; // Texcood transform util
@@ -177,6 +178,8 @@ protected:
     Framebuffer() {}
 };
 typedef std::shared_ptr<Framebuffer> FramebufferPointer;
+typedef ResourceRing<Framebuffer> FramebufferRing;
+typedef std::shared_ptr<FramebufferRing> FramebufferRingPointer;
 
 }
 

libraries/gpu/src/gpu/ResourceRing.h

@@ -0,0 +1,62 @@
+//
+//  Created by Olivier Prat on 2018/02/19
+//  Copyright 2013-2018 High Fidelity, Inc.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+#ifndef hifi_gpu_ResourceRing_h
+#define hifi_gpu_ResourceRing_h
+
+#include <memory>
+#include <array>
+
+namespace gpu {
+    class RingBuffer {
+    public:
+
+        RingBuffer(unsigned int size = 2U) : _size{ size } {}
+        virtual ~RingBuffer() {}
+
+        void advance() {
+            _frontIndex = (_frontIndex + 1) % _size;
+        }
+
+        unsigned int getSize() const { return _size; }
+
+    protected:
+        unsigned int _size;
+        unsigned int _frontIndex{ 0U };
+
+    };
+    typedef std::shared_ptr<RingBuffer> RingBufferPointer;
+
+    template <class R>
+    class ResourceRing : public RingBuffer {
+    public:
+
+        enum {
+            MAX_SIZE = 4
+        };
+
+        using Type = R;
+        using TypePointer = std::shared_ptr<R>;
+
+        ResourceRing(unsigned int size = 2U) : RingBuffer{ size } {}
+
+        void reset() {
+            for (auto& ptr : _resources) {
+                ptr.reset();
+            }
+        }
+
+        TypePointer& edit(unsigned int index) { return _resources[(index + _frontIndex) % _size]; }
+        const TypePointer& get(unsigned int index) const { return _resources[(index + _frontIndex) % _size]; }
+
+    private:
+
+        std::array<TypePointer, MAX_SIZE> _resources;
+    };
+}
+
+#endif

libraries/render-utils/src/AntialiasingEffect.cpp

@@ -188,13 +188,13 @@ const int AntialiasingPass_NextMapSlot = 4;
 
 
 Antialiasing::Antialiasing() {
+    _antialiasingBuffers = std::make_shared<gpu::FramebufferRing>(2U);
 }
 
 Antialiasing::~Antialiasing() {
-    _antialiasingBuffer[0].reset();
-    _antialiasingBuffer[1].reset();
-    _antialiasingTexture[0].reset();
-    _antialiasingTexture[1].reset();
+    _antialiasingBuffers.reset();
+    _antialiasingTextures[0].reset();
+    _antialiasingTextures[1].reset();
 }
 
 const gpu::PipelinePointer& Antialiasing::getAntialiasingPipeline() {
@@ -316,27 +316,26 @@ void Antialiasing::run(const render::RenderContextPointer& renderContext, const
     int width = sourceBuffer->getWidth();
     int height = sourceBuffer->getHeight();
 
-    if (_antialiasingBuffer[0]) {
-        if (_antialiasingBuffer[0]->getSize() != uvec2(width, height)) {// || (sourceBuffer && (_antialiasingBuffer->getRenderBuffer(1) != sourceBuffer->getRenderBuffer(0)))) {
-            _antialiasingBuffer[0].reset();
-            _antialiasingBuffer[1].reset();
-            _antialiasingTexture[0].reset();
-            _antialiasingTexture[1].reset();
+    if (_antialiasingBuffers->get(0)) {
+        if (_antialiasingBuffers->get(0)->getSize() != uvec2(width, height)) {// || (sourceBuffer && (_antialiasingBuffer->getRenderBuffer(1) != sourceBuffer->getRenderBuffer(0)))) {
+            _antialiasingBuffers->edit(0).reset();
+            _antialiasingBuffers->edit(1).reset();
+            _antialiasingTextures[0].reset();
+            _antialiasingTextures[1].reset();
         }
     }
 
-    if (!_antialiasingBuffer[0]) {
+    if (!_antialiasingBuffers->get(0)) {
         // Link the antialiasing FBO to texture
         for (int i = 0; i < 2; i++) {
-            _antialiasingBuffer[i] = gpu::FramebufferPointer(gpu::Framebuffer::create("antialiasing"));
+            auto& antiAliasingBuffer = _antialiasingBuffers->edit(i);
+            antiAliasingBuffer = gpu::FramebufferPointer(gpu::Framebuffer::create("antialiasing"));
             auto format = gpu::Element::COLOR_SRGBA_32; // DependencyManager::get<FramebufferCache>()->getLightingTexture()->getTexelFormat();
             auto defaultSampler = gpu::Sampler(gpu::Sampler::FILTER_MIN_MAG_LINEAR);
-            _antialiasingTexture[i] = gpu::Texture::createRenderBuffer(format, width, height, gpu::Texture::SINGLE_MIP, defaultSampler);
-            _antialiasingBuffer[i]->setRenderBuffer(0, _antialiasingTexture[i]);
+            _antialiasingTextures[i] = gpu::Texture::createRenderBuffer(format, width, height, gpu::Texture::SINGLE_MIP, defaultSampler);
+            antiAliasingBuffer->setRenderBuffer(0, _antialiasingTextures[i]);
         }
     }
-    int nextFrame = (_currentFrame++) % 2;
-    int prevFrame = (nextFrame + 1) % 2;
     
     gpu::doInBatch("Antialiasing::run", args->_context, [&](gpu::Batch& batch) {
         batch.enableStereo(false);
@@ -344,7 +343,7 @@ void Antialiasing::run(const render::RenderContextPointer& renderContext, const
 
         // TAA step
         getAntialiasingPipeline();
-        batch.setResourceTexture(AntialiasingPass_HistoryMapSlot, _antialiasingTexture[prevFrame]);
+        batch.setResourceFramebufferRingTexture(AntialiasingPass_HistoryMapSlot, _antialiasingBuffers, 0);
         batch.setResourceTexture(AntialiasingPass_SourceMapSlot, sourceBuffer->getRenderBuffer(0));
         batch.setResourceTexture(AntialiasingPass_VelocityMapSlot, velocityBuffer->getVelocityTexture());
         batch.setResourceTexture(AntialiasingPass_DepthMapSlot, linearDepthBuffer->getLinearDepthTexture());
@@ -352,7 +351,7 @@ void Antialiasing::run(const render::RenderContextPointer& renderContext, const
         batch.setUniformBuffer(AntialiasingPass_ParamsSlot, _params);
         batch.setUniformBuffer(AntialiasingPass_FrameTransformSlot, deferredFrameTransform->getFrameTransformBuffer());
         
-        batch.setFramebuffer(_antialiasingBuffer[nextFrame]);
+        batch.setFramebufferRing(_antialiasingBuffers, 1);
         batch.setPipeline(getAntialiasingPipeline());       
         batch.draw(gpu::TRIANGLE_STRIP, 4);
 
@@ -365,8 +364,9 @@ void Antialiasing::run(const render::RenderContextPointer& renderContext, const
         }  else {
             batch.setPipeline(getBlendPipeline());
         }
-        batch.setResourceTexture(AntialiasingPass_NextMapSlot, _antialiasingTexture[nextFrame]);
-        batch.draw(gpu::TRIANGLE_STRIP, 4); 
+        batch.setResourceFramebufferRingTexture(AntialiasingPass_NextMapSlot, _antialiasingBuffers, 1);
+        batch.draw(gpu::TRIANGLE_STRIP, 4);
+        batch.advance(_antialiasingBuffers);
         
         batch.setUniformBuffer(AntialiasingPass_ParamsSlot, nullptr);
         batch.setUniformBuffer(AntialiasingPass_FrameTransformSlot, nullptr);

libraries/render-utils/src/AntialiasingEffect.h

@@ -191,15 +191,14 @@ private:
     // Uniforms for AA
     gpu::int32 _texcoordOffsetLoc;
 
-    gpu::FramebufferPointer _antialiasingBuffer[2];
-    gpu::TexturePointer _antialiasingTexture[2];
+    gpu::FramebufferRingPointer _antialiasingBuffers;
+    gpu::TexturePointer _antialiasingTextures[2];
 
     gpu::PipelinePointer _antialiasingPipeline;
     gpu::PipelinePointer _blendPipeline;
     gpu::PipelinePointer _debugBlendPipeline;
 
     TAAParamsBuffer _params;
-    int _currentFrame{ 0 };
 };