Create a new RenderPipeline for CPU only rendering

This takes out of SkiaPipeline what relies on GPU, and puts it into
SkiaGpuPipeline, making SkiaOpenGLPipeline and SkiaVulkanPipeline
inherit from SkiaGpuPipeline.
From the new restricted SkiaPipeline, this creates SkiaCpuPipeline that
only relies on CPU for rendering.
In addition, this moves references to the GrContext out of
IRenderPipeline and into SkGpuPipeline as the only usage is in classes
inheriting from SkGpuPipeline.

Bug: 322360037
Test: build libhwui on host
Change-Id: Ifadacfc593ff54377d6a8a65b0505e294c8d1b29
diff --git a/libs/hwui/pipeline/skia/SkiaCpuPipeline.h b/libs/hwui/pipeline/skia/SkiaCpuPipeline.h
new file mode 100644
index 0000000..5a1014c
--- /dev/null
+++ b/libs/hwui/pipeline/skia/SkiaCpuPipeline.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include "pipeline/skia/SkiaPipeline.h"
+
+namespace android {
+
+namespace uirenderer {
+namespace skiapipeline {
+
+class SkiaCpuPipeline : public SkiaPipeline {
+public:
+    SkiaCpuPipeline(renderthread::RenderThread& thread) : SkiaPipeline(thread) {}
+    ~SkiaCpuPipeline() {}
+
+    bool pinImages(std::vector<SkImage*>& mutableImages) override { return false; }
+    bool pinImages(LsaVector<sk_sp<Bitmap>>& images) override { return false; }
+    void unpinImages() override {}
+
+    // If the given node didn't have a layer surface, or had one of the wrong size, this method
+    // creates a new one and returns true. Otherwise does nothing and returns false.
+    bool createOrUpdateLayer(RenderNode* node, const DamageAccumulator& damageAccumulator,
+                             ErrorHandler* errorHandler) override;
+    void renderLayersImpl(const LayerUpdateQueue& layers, bool opaque) override;
+    void setHardwareBuffer(AHardwareBuffer* hardwareBuffer) override {}
+    bool hasHardwareBuffer() override { return false; }
+
+    renderthread::MakeCurrentResult makeCurrent() override;
+    renderthread::Frame getFrame() override;
+    renderthread::IRenderPipeline::DrawResult draw(
+            const renderthread::Frame& frame, const SkRect& screenDirty, const SkRect& dirty,
+            const LightGeometry& lightGeometry, LayerUpdateQueue* layerUpdateQueue,
+            const Rect& contentDrawBounds, bool opaque, const LightInfo& lightInfo,
+            const std::vector<sp<RenderNode>>& renderNodes, FrameInfoVisualizer* profiler,
+            const renderthread::HardwareBufferRenderParams& bufferParams,
+            std::mutex& profilerLock) override;
+    bool swapBuffers(const renderthread::Frame& frame, IRenderPipeline::DrawResult& drawResult,
+                     const SkRect& screenDirty, FrameInfo* currentFrameInfo,
+                     bool* requireSwap) override {
+        return false;
+    }
+    DeferredLayerUpdater* createTextureLayer() override { return nullptr; }
+    bool setSurface(ANativeWindow* surface, renderthread::SwapBehavior swapBehavior) override;
+    [[nodiscard]] android::base::unique_fd flush() override {
+        return android::base::unique_fd(-1);
+    };
+    void onStop() override {}
+    bool isSurfaceReady() override { return mSurface.get() != nullptr; }
+    bool isContextReady() override { return true; }
+
+    const SkM44& getPixelSnapMatrix() const override {
+        static const SkM44 sSnapMatrix = SkM44();
+        return sSnapMatrix;
+    }
+
+private:
+    sk_sp<SkSurface> mSurface;
+};
+
+} /* namespace skiapipeline */
+} /* namespace uirenderer */
+} /* namespace android */