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76 lines
2.0 KiB
76 lines
2.0 KiB
// #define TEST
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#define X 100
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#define Y 100
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//#define USE_DBL
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#ifdef USE_DBL
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#define TYPE_FLT double
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#define TYPE_INT long
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#define MASK 0xFFFF
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#define SHIFT 16
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#define EPSILSON 4.94065645841247E-324
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#else
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#define TYPE_FLT float
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#define TYPE_INT int
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#define MASK 0x00FF
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#define SHIFT 8
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#define EPSILSON 1.401298E-45
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#endif
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constant sampler_t sampler = CLK_NORMALIZED_COORDS_FALSE |
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CLK_ADDRESS_CLAMP_TO_EDGE |
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CLK_FILTER_LINEAR;
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struct input {
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int gain;
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int dyn_cont_selector;
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float gamma;
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};
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TYPE_FLT read_data(image2d_t input_frame, int x, int z)
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{
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int2 gid = (int2)(x, z);
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uint4 pixel = read_imageui(input_frame, sampler, gid);
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TYPE_INT temp = (TYPE_INT)((TYPE_INT)pixel.x & MASK) |
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(TYPE_INT)(((TYPE_INT)pixel.y & MASK) << SHIFT) |
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(TYPE_INT)(((TYPE_INT)pixel.z & MASK) << (SHIFT * 2)) |
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(TYPE_INT)(((TYPE_INT)pixel.w & MASK) << (SHIFT * 3));
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TYPE_FLT raw_data = *((TYPE_FLT*)(&temp));
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return raw_data;
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}
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kernel void DynCont(read_only image2d_t input_frame, read_write image2d_t output_frame, global TYPE_FLT* scratch_pad, struct input params)
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{
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int2 gid = (int2)(get_global_id(0), get_global_id(1));
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TYPE_FLT input = read_data(input_frame, gid.x, gid.y);
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TYPE_FLT output_data = 0;
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if (params.dyn_cont_selector >= 12)
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{
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output_data = log2((params.gamma - 1) * input + 1) / log2(params.gamma);
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}
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else
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{
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output_data = pow(input, params.gamma);
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}
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output_data = output_data * pow(10.0, params.gain / 20.0);
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if(output_data < 0)
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output_data = 0;
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if(output_data > 1)
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output_data = 1;
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TYPE_INT out = *((TYPE_INT*)(&output_data));
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uint4 pixel;
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pixel.x = (TYPE_INT)(out & MASK);
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pixel.y = (TYPE_INT)((out >> SHIFT) & MASK);
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pixel.z = (TYPE_INT)((out >> (SHIFT *2)) & MASK);
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pixel.w = (TYPE_INT)((out >> (SHIFT * 3)) & MASK);
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write_imageui(output_frame, gid, pixel);
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}
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