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Unified Diff: src/gpu/effects/GrInstanceProcessor.h

Issue 1897203002: Implement instanced rendering for simple shapes (Closed) Base URL: https://skia.googlesource.com/skia.git@upload2_requireHWAA
Patch Set: comments Created 4 years, 8 months ago
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Index: src/gpu/effects/GrInstanceProcessor.h
diff --git a/src/gpu/effects/GrInstanceProcessor.h b/src/gpu/effects/GrInstanceProcessor.h
new file mode 100644
index 0000000000000000000000000000000000000000..e8bf9e9d150e1a23716f91e1309076fc86966937
--- /dev/null
+++ b/src/gpu/effects/GrInstanceProcessor.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrInstanceProcessor_DEFINED
+#define GrInstanceProcessor_DEFINED
+
+#include "GrBufferAccess.h"
+#include "GrGeometryProcessor.h"
+#include "GrInstancedRenderingTypes.h"
+
+/**
+ * This class provides a GP implementation that uses instanced rendering. Is sends geometry in as
+ * basic, pre-baked canonical shapes, and uses instanced vertex attribs to control how these shapes
+ * are transformed and drawn. MSAA is accomplished with the sample mask rather than finely
+ * tesselated geometry.
+ */
+class GrInstanceProcessor : public GrGeometryProcessor, private GrInstancedRenderingTypes {
+public:
+ static uint32_t GetSupportedAAModes(const GrGLSLCaps&, const GrCaps&);
+
+ GrInstanceProcessor(BatchInfo, GrBuffer* paramsBuffer);
+
+ const char* name() const override { return "Instance Processor"; }
+ BatchInfo batchInfo() const { return fBatchInfo; }
+
+ void getGLSLProcessorKey(const GrGLSLCaps&, GrProcessorKeyBuilder* b) const override {
+ b->add32(fBatchInfo.fData);
+ }
+ GrGLSLPrimitiveProcessor* createGLSLInstance(const GrGLSLCaps&) const override;
+
+ /**
+ * Returns a buffer of ShapeVertex that defines the canonical instanced geometry.
+ */
+ static const GrBuffer* SK_WARN_UNUSED_RESULT FindOrCreateVertexBuffer(GrGpu*);
+
+ /**
+ * Returns a buffer of 8-bit indices for the canonical instanced geometry. The client can call
+ * GetIndexRangeForXXX to know which indices to use for a specific shape.
+ */
+ static const GrBuffer* SK_WARN_UNUSED_RESULT FindOrCreateIndex8Buffer(GrGpu*);
+
+ static void GetIndexRangeForRect(AntialiasMode, uint32_t* firstIndex, uint32_t* count);
+ static void GetIndexRangeForOval(AntialiasMode, const SkRect& devBounds, uint32_t* firstIndex,
+ uint32_t* count);
+ static void GetIndexRangeForRRect(AntialiasMode, uint32_t* firstIndex, uint32_t* count);
+
+private:
+ const BatchInfo fBatchInfo;
+ GrBufferAccess fParamsAccess;
+
+ typedef GrGeometryProcessor INHERITED;
+};
+
+#endif
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