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111 lines
3.6 KiB
C++
111 lines
3.6 KiB
C++
// Copyright NVIDIA Corporation 2007 -- Ignacio Castano <icastano@nvidia.com>
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without
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// restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following
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// conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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//#include <nvcore/StrLib.h>
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#include <nvcore/Timer.h>
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#include <nvtt/nvtt.h>
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#include <nvmath/nvmath.h>
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#include "../tools/cmdline.h"
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#include <stdlib.h> // EXIT_SUCCESS, EXIT_FAILURE
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#include <stdio.h> // printf
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int main(int argc, char *argv[])
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{
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MyAssertHandler assertHandler;
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MyMessageHandler messageHandler;
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// Init context.
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nvtt::Context context;
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const char * fileName = "envmap.dds";
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if (argc > 1) fileName = argv[1];
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// Load cubemap.
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nvtt::CubeSurface envmap;
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if (!envmap.load(fileName, 0)) {
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printf("Error loading envmap.dds\n");
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return EXIT_FAILURE;
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}
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//envmap.toLinear(2.2f);
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// Setup compression options.
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nvtt::CompressionOptions compressionOptions;
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compressionOptions.setFormat(nvtt::Format_RGBA);
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compressionOptions.setPixelType(nvtt::PixelType_Float);
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compressionOptions.setPixelFormat(16, 16, 16, 16);
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// Setup output options.
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nvtt::OutputOptions outputOptions;
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outputOptions.setFileName("filtered_envmap.dds");
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//outputOptions.setSrgbFlag(true);
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const int MAX_MIPMAP_COUNT = 7; // nv::log2(64) + 1;
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//const int mipmapCount = MAX_MIPMAP_COUNT;
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const int mipmapCount = 4;
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//const int mipmapCount = 1;
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const int firstMipmap = 0;
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int topSize = 64;
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float topPower = 64;
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// Output header.
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context.outputHeader(nvtt::TextureType_Cube, topSize >> firstMipmap, topSize >> firstMipmap, 1, 1, mipmapCount-firstMipmap, false, compressionOptions, outputOptions);
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nv::Timer timer;
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timer.start();
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nvtt::CubeSurface filteredEnvmap[mipmapCount];
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// Output filtered mipmaps.
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for (int m = firstMipmap; m < mipmapCount; m++) {
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int size = topSize >> m; // 64, 32, 16, 8
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float cosine_power = topPower / (1 << (2 * m)); // 64, 16, 4, 1
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cosine_power = nv::max(1.0f, cosine_power);
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printf("filtering step: %d/%d\n", m+1, mipmapCount);
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filteredEnvmap[m] = envmap.cosinePowerFilter(size, cosine_power, nvtt::EdgeFixup_Warp);
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//filteredEnvmap[m].toGamma(2.2f);
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}
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for (int f = 0; f < 6; f++) {
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for (int m = firstMipmap; m < mipmapCount; m++) {
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context.compress(filteredEnvmap[m].face(f), f, m-firstMipmap, compressionOptions, outputOptions);
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}
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}
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timer.stop();
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printf("done in %f seconds\n", timer.elapsed());
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return EXIT_SUCCESS;
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}
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