/**
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* \brief Image scaling kernel function.
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* \param[in] input Input image object.
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* \param[out] output scaled output image object.
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* \param[in] output_width: output width
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* \param[in] output_height: output height
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* \param[in] vertical_offset: vertical offset from y to uv
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*/
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__kernel void kernel_image_scaler (__read_only image2d_t input,
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__write_only image2d_t output,
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const uint output_width,
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const uint output_height)
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{
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int x = get_global_id(0);
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int y = get_global_id(1);
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const sampler_t sampler = CLK_NORMALIZED_COORDS_TRUE | CLK_ADDRESS_CLAMP_TO_EDGE | CLK_FILTER_LINEAR;
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float2 normCoor = convert_float2((int2)(x, y)) / (float2)(output_width, output_height);
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float4 scaled_pixel = read_imagef(input, sampler, normCoor);
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write_imagef(output, (int2)(x, y), scaled_pixel);
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}
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