COM_symmetric_separable_blur_weights.hh

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/* SPDX-FileCopyrightText: 2023 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#pragma once
 
#include <cstdint>
#include <memory>
 
#include "BLI_map.hh"
#include "BLI_math_vector_types.hh"
 
#include "GPU_shader.hh"
#include "GPU_texture.hh"
 
#include "COM_cached_resource.hh"
 
namespace blender::realtime_compositor {
 
class Context;
 
/* -------------------------------------------------------------------- */
class SymmetricSeparableBlurWeightsKey {
 public:
  int type;
  float radius;
 
  SymmetricSeparableBlurWeightsKey(int type, float radius);
 
  uint64_t hash() const;
};
 
bool operator==(const SymmetricSeparableBlurWeightsKey &a,
                const SymmetricSeparableBlurWeightsKey &b);
 
/* -------------------------------------------------------------------- */
class SymmetricSeparableBlurWeights : public CachedResource {
 private:
  GPUTexture *texture_ = nullptr;
 
 public:
  SymmetricSeparableBlurWeights(Context &context, int type, float radius);
 
  ~SymmetricSeparableBlurWeights();
 
  void bind_as_texture(GPUShader *shader, const char *texture_name) const;
 
  void unbind_as_texture() const;
};
 
/* -------------------------------------------------------------------- */
class SymmetricSeparableBlurWeightsContainer : public CachedResourceContainer {
 private:
  Map<SymmetricSeparableBlurWeightsKey, std::unique_ptr<SymmetricSeparableBlurWeights>> map_;
 
 public:
  void reset() override;
 
  /* Check if there is an available SymmetricSeparableBlurWeights cached resource with the given
   * parameters in the container, if one exists, return it, otherwise, return a newly created one
   * and add it to the container. In both cases, tag the cached resource as needed to keep it
   * cached for the next evaluation. */
  SymmetricSeparableBlurWeights &get(Context &context, int type, float radius);
};
 
}  // namespace blender::realtime_compositor