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/* SPDX-License-Identifier: GPL-2.0-or-later */
#pragma once
#include <cstdint>
#include "BLI_math_vec_types.hh"
#include "GPU_shader.h"
#include "GPU_texture.h"
#include "COM_cached_resource.hh"
namespace blender::realtime_compositor {
/* ------------------------------------------------------------------------------------------------
* Symmetric Separable Blur Weights Key.
*/
class SymmetricSeparableBlurWeightsKey {
public:
int type;
float radius;
SymmetricSeparableBlurWeightsKey(int type, float radius);
uint64_t hash() const;
};
bool operator==(const SymmetricSeparableBlurWeightsKey &a,
const SymmetricSeparableBlurWeightsKey &b);
/* -------------------------------------------------------------------------------------------------
* Symmetric Separable Blur Weights.
*
* A cached resource that computes and caches a 1D GPU texture containing the weights of the
* separable filter of the given type and radius. The filter is assumed to be symmetric, because
* the filter functions are all even functions. Consequently, only the positive half of the filter
* is computed and the shader takes that into consideration. */
class SymmetricSeparableBlurWeights : public CachedResource {
private:
GPUTexture *texture_ = nullptr;
public:
SymmetricSeparableBlurWeights(int type, float radius);
~SymmetricSeparableBlurWeights();
void bind_as_texture(GPUShader *shader, const char *texture_name) const;
void unbind_as_texture() const;
};
} // namespace blender::realtime_compositor
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