Graphite: Add stubs for Pipeline and PipelineDesc

Bug: skia:12466
Change-Id: Ie949a17166b3ab5c529b74a6762c8a6f8ca8052f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/453061
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>

experimental/graphite/src/Pipeline.cpp

@@ -0,0 +1,18 @@
+/*
+ * Copyright 2021 Google LLC
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "experimental/graphite/src/Pipeline.h"
+
+namespace skgpu {
+
+Pipeline::Pipeline() {
+}
+
+Pipeline::~Pipeline() {
+}
+
+} // namespace skgpu

experimental/graphite/src/Pipeline.h

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2021 Google LLC
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef skgpu_Pipeline_DEFINED
+#define skgpu_Pipeline_DEFINED
+
+namespace skgpu {
+
+// TODO: derive this from something like GrManagedResource
+class Pipeline {
+public:
+    ~Pipeline();
+
+protected:
+    Pipeline();
+
+private:
+};
+
+} // namespace skgpu
+
+#endif // skgpu_Pipeline_DEFINED

experimental/graphite/src/PipelineDesc.cpp

@@ -0,0 +1,18 @@
+/*
+ * Copyright 2021 Google LLC
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "experimental/graphite/src/PipelineDesc.h"
+
+namespace skgpu {
+
+PipelineDesc::PipelineDesc() {
+}
+
+PipelineDesc::~PipelineDesc() {
+}
+
+} // namespace skgpu

experimental/graphite/src/PipelineDesc.h

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2021 Google LLC
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef skgpu_PipelineDesc_DEFINED
+#define skgpu_PipelineDesc_DEFINED
+
+namespace skgpu {
+
+class PipelineDesc {
+public:
+    PipelineDesc();
+    ~PipelineDesc();
+
+private:
+};
+
+} // namespace skgpu
+
+#endif // skgpu_PipelineDesc_DEFINED

experimental/graphite/src/ResourceProvider.cpp

@@ -8,6 +8,7 @@
 #include "experimental/graphite/src/ResourceProvider.h"
 
 #include "experimental/graphite/src/CommandBuffer.h"
+#include "experimental/graphite/src/Pipeline.h"
 
 namespace skgpu {
 
@@ -23,4 +24,14 @@ std::unique_ptr<CommandBuffer> ResourceProvider::createCommandBuffer() {
     return cb;
 }
 
+Pipeline* ResourceProvider::findOrCreatePipeline(const PipelineDesc& desc) {
+    // TODO: look through cache for matching pipeline
+
+    auto pso = this->onCreatePipeline();
+
+    // TODO: cache new pipeline
+
+    return pso;
+}
+
 } // namespace skgpu

experimental/graphite/src/ResourceProvider.h

@@ -13,17 +13,21 @@
 namespace skgpu {
 
 class CommandBuffer;
+class Pipeline;
+class PipelineDesc;
 
 class ResourceProvider {
 public:
     virtual ~ResourceProvider();
 
     std::unique_ptr<CommandBuffer> createCommandBuffer();
+    Pipeline* findOrCreatePipeline(const PipelineDesc&);
 
 protected:
     ResourceProvider();
 
     virtual std::unique_ptr<CommandBuffer> onCreateCommandBuffer() { return nullptr; }
+    virtual Pipeline* onCreatePipeline() { return nullptr; }
 
 private:
 };

gn/graphite.gni

@@ -25,6 +25,10 @@ skia_graphite_sources = [
   "$_src/Gpu.h",
   "$_src/Image_Graphite.cpp",
   "$_src/Image_Graphite.h",
+  "$_src/Pipeline.cpp",
+  "$_src/Pipeline.h",
+  "$_src/PipelineDesc.cpp",
+  "$_src/PipelineDesc.h",
   "$_src/RenderPassTask.cpp",
   "$_src/RenderPassTask.h",
   "$_src/ResourceProvider.cpp",