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91 lines
2.9 KiB
C++
91 lines
2.9 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 <nvtt/nvtt.h>
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#include <stdlib.h> // EXIT_SUCCESS, EXIT_FAILURE
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int main(int argc, char *argv[])
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{
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if (argc != 2) return EXIT_FAILURE;
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const char * inputFileName = argv[1];
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// Init context.
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nvtt::Context context;
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context.enableCudaAcceleration(false);
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// Load input image.
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nvtt::Surface image;
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if (!image.load(inputFileName)) {
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return EXIT_FAILURE;
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}
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// Setup compression options.
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nvtt::CompressionOptions compressionOptions;
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compressionOptions.setFormat(nvtt::Format_BC3);
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//compressionOptions.setFormat(nvtt::Format_RGBA);
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// Setup output options.
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nvtt::OutputOptions outputOptions;
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nv::Path outputFileName(inputFileName);
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outputFileName.stripExtension();
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outputFileName.append(".dds");
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outputOptions.setFileName(outputFileName.str());
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// Output compressed image.
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context.outputHeader(image, image.countMipmaps(), compressionOptions, outputOptions);
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image.flipY();
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image.setAlphaMode(nvtt::AlphaMode_Transparency);
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// Output first mipmap.
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context.compress(image, 0, 0, compressionOptions, outputOptions);
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float gamma = 2.2f;
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image.toLinear(gamma);
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float alphaRef = 0.95f;
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float coverage = image.alphaTestCoverage(alphaRef);
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// Build mimaps.
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int m = 1;
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while (image.buildNextMipmap(nvtt::MipmapFilter_Kaiser))
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{
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nvtt::Surface tmpImage = image;
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tmpImage.toGamma(gamma);
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tmpImage.scaleAlphaToCoverage(coverage, alphaRef);
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context.compress(tmpImage, 0, m, compressionOptions, outputOptions);
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m++;
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}
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return EXIT_SUCCESS;
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}
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