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88 lines
3.0 KiB
C++
88 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 "llvm/ADT/ArrayRef.h"
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#include <tuple>
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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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