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63 lines
2.6 KiB
Plaintext
63 lines
2.6 KiB
Plaintext
/* Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of NVIDIA CORPORATION nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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// Utilities and system includes
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#include <helper_cuda.h>
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// clamp x to range [a, b]
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__device__ float clamp(float x, float a, float b) { return max(a, min(b, x)); }
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__device__ int clamp(int x, int a, int b) { return max(a, min(b, x)); }
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// convert floating point rgb color to 8-bit integer
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__device__ int rgbToInt(float r, float g, float b) {
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r = clamp(r, 0.0f, 255.0f);
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g = clamp(g, 0.0f, 255.0f);
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b = clamp(b, 0.0f, 255.0f);
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return (int(b) << 16) | (int(g) << 8) | int(r);
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}
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__global__ void cudaProcess(unsigned int *g_odata, int imgw) {
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extern __shared__ uchar4 sdata[];
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int tx = threadIdx.x;
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int ty = threadIdx.y;
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int bw = blockDim.x;
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int bh = blockDim.y;
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int x = blockIdx.x * bw + tx;
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int y = blockIdx.y * bh + ty;
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uchar4 c4 = make_uchar4((x & 0x20) ? 100 : 0, 0, (y & 0x20) ? 100 : 0, 0);
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g_odata[y * imgw + x] = rgbToInt(c4.z, c4.y, c4.x);
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}
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extern "C" void launch_cudaProcess(dim3 grid, dim3 block, int sbytes,
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unsigned int *g_odata, int imgw) {
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cudaProcess<<<grid, block, sbytes>>>(g_odata, imgw);
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}
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