src/dawn_native/opengl/SamplerGL.h

// Copyright 2017 The Dawn Authors
//
// 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.

#ifndef DAWNNATIVE_OPENGL_SAMPLERGL_H_
#define DAWNNATIVE_OPENGL_SAMPLERGL_H_

#include "dawn_native/Sampler.h"

#include "dawn_native/opengl/opengl_platform.h"

namespace dawn_native { namespace opengl {

    class Device;

    class Sampler final : public SamplerBase {
      public:
        Sampler(Device* device, const SamplerDescriptor* descriptor);

        GLuint GetFilteringHandle() const;
        GLuint GetNonFilteringHandle() const;

      private:
        ~Sampler() override;

        void SetupGLSampler(GLuint sampler, const SamplerDescriptor* descriptor, bool forceNearest);

        GLuint mFilteringHandle;

        // This is a sampler equivalent to mFilteringHandle except that it uses NEAREST filtering
        // for everything, which is important to preserve texture completeness for u/int textures.
        GLuint mNonFilteringHandle;
    };

}}  // namespace dawn_native::opengl

#endif  // DAWNNATIVE_OPENGL_SAMPLERGL_H_