1 /** 2 * \brief Image scaling kernel function. 3 * \param[in] input Input image object. 4 * \param[out] output scaled output image object. 5 * \param[in] output_width: output width 6 * \param[in] output_height: output height 7 * \param[in] vertical_offset: vertical offset from y to uv 8 */ 9 __kernel void kernel_image_scaler (__read_only image2d_t input, 10 __write_only image2d_t output, 11 const uint output_width, 12 const uint output_height) 13 { 14 int x = get_global_id(0); 15 int y = get_global_id(1); 16 17 const sampler_t sampler = CLK_NORMALIZED_COORDS_TRUE | CLK_ADDRESS_CLAMP_TO_EDGE | CLK_FILTER_LINEAR; 18 19 float2 normCoor = convert_float2((int2)(x, y)) / (float2)(output_width, output_height); 20 float4 scaled_pixel = read_imagef(input, sampler, normCoor); 21 write_imagef(output, (int2)(x, y), scaled_pixel); 22 } 23 24
