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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
89 lines
3.0 KiB
C++
89 lines
3.0 KiB
C++
//===-- xray-graph.h - XRay Function Call Graph Renderer --------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// A class to get a color from a specified gradient.
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//
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//===----------------------------------------------------------------------===//
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#ifndef XRAY_COLOR_HELPER_H
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#define XRAY_COLOR_HELPER_H
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#include <tuple>
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#include "llvm/ADT/ArrayRef.h"
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namespace llvm {
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namespace xray {
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/// The color helper class it a healper class which allows you to easily get a
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/// color in a gradient. This is used to color-code edges in XRay-Graph tools.
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///
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/// There are two types of color schemes in this class:
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/// - Sequential schemes, which are used to represent information from some
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/// minimum to some maximum. These take an input in the range [0,1]
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/// - Diverging schemes, which are used to represent information representing
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/// differenes, or a range that goes from negative to positive. These take
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/// an input in the range [-1,1].
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/// Usage;
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/// ColorHelper S(ColorHelper::SequentialScheme::OrRd); //Chose a color scheme.
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/// for (double p = 0.0; p <= 1; p += 0.1){
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/// cout() << S.getColor(p) << " \n"; // Sample the gradient at 0.1 intervals
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/// }
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///
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/// ColorHelper D(ColorHelper::DivergingScheme::Spectral); // Choose a color
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/// // scheme.
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/// for (double p= -1; p <= 1 ; p += 0.1){
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/// cout() << D.getColor(p) << " \n"; // sample the gradient at 0.1 intervals
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/// }
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class ColorHelper {
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double MinIn;
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double MaxIn;
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ArrayRef<std::tuple<uint8_t, uint8_t, uint8_t>> ColorMap;
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ArrayRef<std::tuple<uint8_t, uint8_t, uint8_t>> BoundMap;
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public:
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/// Enum of the availible Sequential Color Schemes
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enum class SequentialScheme {
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// Schemes based on the ColorBrewer Color schemes of the same name from
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// http://www.colorbrewer.org/ by Cynthis A Brewer Penn State University.
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Greys,
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OrRd,
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PuBu
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};
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ColorHelper(SequentialScheme S);
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/// Enum of the availible Diverging Color Schemes
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enum class DivergingScheme {
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// Schemes based on the ColorBrewer Color schemes of the same name from
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// http://www.colorbrewer.org/ by Cynthis A Brewer Penn State University.
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PiYG
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};
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ColorHelper(DivergingScheme S);
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// Sample the gradient at the input point.
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std::tuple<uint8_t, uint8_t, uint8_t> getColorTuple(double Point) const;
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std::string getColorString(double Point) const;
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// Get the Default color, at the moment allways black.
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std::tuple<uint8_t, uint8_t, uint8_t> getDefaultColorTuple() const {
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return std::make_tuple(0, 0, 0);
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}
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std::string getDefaultColorString() const { return "black"; }
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// Convert a tuple to a string
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static std::string getColorString(std::tuple<uint8_t, uint8_t, uint8_t> t);
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};
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} // namespace xray
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} // namespace llvm
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#endif
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