Refugee from Dead Machine 4: MDB Monster

src/gpu/GrTargetCommands.h

+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrTargetCommands_DEFINED
+#define GrTargetCommands_DEFINED
+
+#include "GrDrawTarget.h"
+#include "GrPath.h"
+#include "GrPendingProgramElement.h"
+#include "GrPrimitiveProcessor.h"
+#include "GrRenderTarget.h"
+#include "GrTRecorder.h"
+
+#include "batches/GrBatch.h"
+
+#include "SkRect.h"
+
+class GrResourceProvider;
+class GrBatchFlushState;
+
+// TODO: Convert all commands into GrBatch and remove this class.
+class GrTargetCommands : ::SkNoncopyable {
+public:
+    bool empty() const { return fCmdBuffer.empty(); }
+
+    GrTargetCommands(GrFoo* foo, GrGpu* gpu, GrRenderTarget* dst)
+        : fCmdBuffer(kCmdBufferInitialSizeInBytes)
+        , fFoo(foo)
+//        , fBatchTarget(foo, gpu, dst)
+        , fLastFlushToken(0) {
+    }
+
+    class Cmd : ::SkNoncopyable {
+    public:
+        enum CmdType {
+            kDrawPath_CmdType          = 2,
+            kDrawPaths_CmdType         = 3,
+            kDrawBatch_CmdType         = 4,
+        };
+
+        Cmd(CmdType type)
+            : fType(type)
+#if GR_BATCH_SPEW
+            , fUniqueID(GenID(&gUniqueID))
+#endif
+        {}
+        virtual ~Cmd() {}
+
+        virtual void execute(GrBatchFlushState*) = 0;
+
+        CmdType type() const { return fType; }
+
+        GrBATCH_SPEW(uint32_t uniqueID() const { return fUniqueID;} )
+
+    private:
+        // TODO move this to a common header so it can be shared with GrBatch
+        static uint32_t GenID(int32_t* idCounter) {
+            uint32_t id = static_cast<uint32_t>(sk_atomic_inc(idCounter)) + 1;
+            if (!id) {
+                SkFAIL("This should never wrap\n");
+            }
+            return id;
+        }
+        CmdType          fType;
+        GrBATCH_SPEW(uint32_t fUniqueID);
+        GrBATCH_SPEW(static int32_t gUniqueID;)
+    };
+
+    void reset();
+    void flush(GrGpu*, GrResourceProvider*);
+
+private:
+    friend class GrCommandBuilder;
+    friend class GrBufferedDrawTarget; // This goes away when State becomes just a pipeline
+    friend class GrReorderCommandBuilder;
+
+    typedef GrGpu::DrawArgs DrawArgs;
+
+    // TODO: This can be just a pipeline once paths are in batch, and it should live elsewhere
+    struct StateForPathDraw : public SkNVRefCnt<StateForPathDraw> {
+        // TODO get rid of the prim proc parameter when we use batch everywhere
+        StateForPathDraw(const GrPrimitiveProcessor* primProc = nullptr)
+            : fPrimitiveProcessor(primProc)
+            , fCompiled(false) {}
+
+        ~StateForPathDraw() { reinterpret_cast<GrPipeline*>(fPipeline.get())->~GrPipeline(); }
+
+        // This function is only for getting the location in memory where we will create our
+        // pipeline object.
+        void* pipelineLocation() { return fPipeline.get(); }
+
+        const GrPipeline* getPipeline() const {
+            return reinterpret_cast<const GrPipeline*>(fPipeline.get());
+        }
+        GrRenderTarget* getRenderTarget1() const {
+            return this->getPipeline()->getRenderTarget1();
+        }
+        const GrXferProcessor* getXferProcessor() const {
+            return this->getPipeline()->getXferProcessor();
+        }
+
+        void operator delete(void* p) {}
+        void* operator new(size_t) {
+            SkFAIL("All States are created by placement new.");
+            return sk_malloc_throw(0);
+        }
+
+        void* operator new(size_t, void* p) { return p; }
+        void operator delete(void* target, void* placement) {
+            ::operator delete(target, placement);
+        }
+
+        typedef GrPendingProgramElement<const GrPrimitiveProcessor> ProgramPrimitiveProcessor;
+        ProgramPrimitiveProcessor               fPrimitiveProcessor;
+        SkAlignedSStorage<sizeof(GrPipeline)>   fPipeline;
+        GrProgramDesc                           fDesc;
+        GrBatchTracker                          fBatchTracker;
+        bool                                    fCompiled;
+    };
+    // TODO remove this when State is just a pipeline
+    friend SkNVRefCnt<StateForPathDraw>;
+
+    struct DrawPath : public Cmd {
+        DrawPath(StateForPathDraw* state, const GrPath* path)
+            : Cmd(kDrawPath_CmdType)
+            , fState(SkRef(state))
+            , fPath(path) {}
+
+        const GrPath* path() const { return fPath.get(); }
+
+        void execute(GrBatchFlushState*) override;
+
+        SkAutoTUnref<StateForPathDraw>  fState;
+        GrStencilSettings               fStencilSettings;
+    private:
+        GrPendingIOResource<const GrPath, kRead_GrIOType> fPath;
+    };
+
+    struct DrawPaths : public Cmd {
+        DrawPaths(StateForPathDraw* state, const GrPathRange* pathRange)
+            : Cmd(kDrawPaths_CmdType)
+            , fState(SkRef(state))
+            , fPathRange(pathRange) {}
+
+        const GrPathRange* pathRange() const { return fPathRange.get();  }
+
+        void execute(GrBatchFlushState*) override;
+
+        SkAutoTUnref<StateForPathDraw>  fState;
+        char*                           fIndices;
+        GrDrawTarget::PathIndexType     fIndexType;
+        float*                          fTransforms;
+        GrDrawTarget::PathTransformType fTransformType;
+        int                             fCount;
+        GrStencilSettings               fStencilSettings;
+
+    private:
+        GrPendingIOResource<const GrPathRange, kRead_GrIOType> fPathRange;
+    };
+
+    struct DrawBatch : public Cmd {
+        DrawBatch(GrBatch* batch)
+            : Cmd(kDrawBatch_CmdType)
+            , fBatch(SkRef(batch)){
+            SkASSERT(!batch->isUsed());
+        }
+
+        GrBatch* batch() { return fBatch; }
+        void execute(GrBatchFlushState*) override;
+
+    private:
+        SkAutoTUnref<GrBatch>   fBatch;
+    };
+
+    static const int kCmdBufferInitialSizeInBytes = 8 * 1024;
+
+    typedef void* TCmdAlign; // This wouldn't be enough align if a command used long double.
+    typedef GrTRecorder<Cmd, TCmdAlign> CmdBuffer;
+
+    CmdBuffer* cmdBuffer() { return &fCmdBuffer; }
+
+    CmdBuffer                           fCmdBuffer;
+    GrFoo*                              fFoo;
+    GrBatchToken                        fLastFlushToken;
+};
+
+#endif