9c4909b50f
imgblur is intended to establish a ground truth for debugging mask blur issues. It performs a brute force (non-separable) Gaussian blur of the provided image. The blur code itself is in sk_tools_utils so it can be more easily used programmatically in other places (e.g., blur unit tests). Review URL: https://codereview.chromium.org/1384203002
84 lines
2.3 KiB
C++
84 lines
2.3 KiB
C++
/*
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* Copyright 2015 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkCommandLineFlags.h"
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#include "SkCommonFlags.h"
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#include "SkImageDecoder.h"
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#include "SkStream.h"
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#include "SkTypes.h"
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#include "sk_tool_utils.h"
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DEFINE_string(in, "input.png", "Input image");
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DEFINE_string(out, "blurred.png", "Output image");
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DEFINE_double(sigma, 1, "Sigma to be used for blur (> 0.0f)");
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// This tool just performs a blur on an input image
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// Return codes:
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static const int kSuccess = 0;
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static const int kError = 1;
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int tool_main(int argc, char** argv);
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int tool_main(int argc, char** argv) {
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SkCommandLineFlags::SetUsage("Brute force blur of an image.");
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SkCommandLineFlags::Parse(argc, argv);
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if (FLAGS_sigma <= 0) {
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if (!FLAGS_quiet) {
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SkDebugf("Sigma must be greater than zero (it is %f).\n", FLAGS_sigma);
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}
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return kError;
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}
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SkFILEStream inputStream(FLAGS_in[0]);
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if (!inputStream.isValid()) {
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if (!FLAGS_quiet) {
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SkDebugf("Couldn't open file: %s\n", FLAGS_in[0]);
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}
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return kError;
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}
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SkAutoTDelete<SkImageDecoder> codec(SkImageDecoder::Factory(&inputStream));
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if (!codec) {
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if (!FLAGS_quiet) {
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SkDebugf("Couldn't create codec for: %s.\n", FLAGS_in[0]);
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}
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return kError;
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}
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SkBitmap src;
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inputStream.rewind();
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SkImageDecoder::Result res = codec->decode(&inputStream, &src,
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kN32_SkColorType,
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SkImageDecoder::kDecodePixels_Mode);
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if (SkImageDecoder::kSuccess != res) {
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if (!FLAGS_quiet) {
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SkDebugf("Couldn't decode image: %s.\n", FLAGS_in[0]);
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}
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return kError;
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}
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SkBitmap dst = sk_tool_utils::slow_blur(src, (float) FLAGS_sigma);
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if (!SkImageEncoder::EncodeFile(FLAGS_out[0], dst, SkImageEncoder::kPNG_Type, 100)) {
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if (!FLAGS_quiet) {
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SkDebugf("Couldn't write to file: %s\n", FLAGS_out[0]);
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}
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return kError;
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}
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return kSuccess;
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}
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#if !defined SK_BUILD_FOR_IOS
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int main(int argc, char * const argv[]) {
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return tool_main(argc, (char**) argv);
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}
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#endif
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