xref: /aosp_15_r20/external/skia/src/gpu/ganesh/ops/TessellationPathRenderer.h (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17)

/*
 * 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 "src/gpu/ganesh/PathRenderer.h"

class GrCaps;
class GrStyledShape;

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