TessellationPathRenderer.h

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/*
 * Copyright 2019 Google LLC.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
#ifndef TessellationPathRenderer_DEFINED
#define TessellationPathRenderer_DEFINED
 
#include "include/gpu/GrTypes.h"
#include "src/gpu/ganesh/PathRenderer.h"
 
class GrCaps;
 
namespace skgpu::ganesh {
 
// This is the tie-in point for path rendering via PathTessellateOp. This path renderer draws
// paths using a hybrid Red Book "stencil, then cover" method. Curves get linearized by GPU
// tessellation shaders. This path renderer doesn't apply analytic AA, so it requires MSAA if AA is
// desired.
class TessellationPathRenderer final : public PathRenderer {
public:
    static bool IsSupported(const GrCaps&);
 
    const char* name() const override { return "Tessellation"; }
 
private:
    StencilSupport onGetStencilSupport(const GrStyledShape&) const override;
    CanDrawPath onCanDrawPath(const CanDrawPathArgs&) const override;
    bool onDrawPath(const DrawPathArgs&) override;
    void onStencilPath(const StencilPathArgs&) override;
};
 
}  // namespace skgpu::ganesh
 
#endif // TessellationPathRenderer_DEFINED