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From: "Yordan Karadzhov (VMware)" <y.karadz@gmail.com>
To: rostedt@goodmis.org
Cc: linux-trace-devel@vger.kernel.org,
	"Yordan Karadzhov (VMware)" <y.karadz@gmail.com>
Subject: [PATCH v8 36/44] kernel-shark: Add getStreamColorTable()
Date: Mon,  4 Jan 2021 19:47:16 +0200
Message-ID: <20210104174724.70404-37-y.karadz@gmail.com> (raw)
In-Reply-To: <20210104174724.70404-1-y.karadz@gmail.com>

This method provides a hash table that maps the stream Ids to
rainbow-like colors.

Signed-off-by: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
---
 src/KsPlotTools.cpp | 50 +++++++++++++++++++++++++++++++++++++++++++++
 src/KsPlotTools.hpp |  4 ++++
 2 files changed, 54 insertions(+)

diff --git a/src/KsPlotTools.cpp b/src/KsPlotTools.cpp
index 113a6c0..400a3e2 100644
--- a/src/KsPlotTools.cpp
+++ b/src/KsPlotTools.cpp
@@ -97,6 +97,23 @@ void Color::setRainbowColor(int n)
 	set(r, g, b);
 }
 
+/** Alpha blending with white background. */
+void Color::blend(float alpha)
+{
+	if (alpha < 0 || alpha > 1.)
+		return;
+
+	auto lamBld = [alpha](int val) {
+		return  val * alpha + (1 - alpha) * 255;
+	};
+
+	int r = lamBld(this->r());
+	int g = lamBld(this->g());
+	int b = lamBld(this->b());
+
+	set(r, g, b);
+}
+
 /**
  * @brief Create a Hash table of Rainbow colors. The sorted Pid values are
  *	  mapped to the palette of Rainbow colors.
@@ -182,6 +199,39 @@ ColorTable getCPUColorTable()
 	return colors;
 }
 
+/**
+ * @brief Create a Hash table of Rainbow colors. The Steam Ids are
+ *	  mapped to the palette of Rainbow colors.
+ *
+ * @returns ColorTable instance.
+ */
+ColorTable getStreamColorTable()
+{
+	kshark_context *kshark_ctx(nullptr);
+	ColorTable colors;
+	Color color;
+	float alpha(.35);
+	int *streamIds;
+
+	if (!kshark_instance(&kshark_ctx))
+		return colors;
+
+	streamIds = kshark_all_streams(kshark_ctx);
+	for (int i = 0; i < kshark_ctx->n_streams; ++i) {
+		/*
+		 * Starting from index 6 provides better functioning of the
+		 * color scheme slider.
+		 */
+		color.setRainbowColor(i + 6);
+		color.blend(alpha);
+		colors[streamIds[i]] = color;
+	}
+
+	free(streamIds);
+
+	return colors;
+}
+
 /**
  * @brief Search the Hash table of Rainbow colors for a particular key (pid).
  *
diff --git a/src/KsPlotTools.hpp b/src/KsPlotTools.hpp
index 6e66373..dd6c77f 100644
--- a/src/KsPlotTools.hpp
+++ b/src/KsPlotTools.hpp
@@ -47,6 +47,8 @@ public:
 
 	void setRainbowColor(int n);
 
+	void blend(float alpha);
+
 	/**
 	 * @brief Get the C struct defining the RGB color.
 	 */
@@ -78,6 +80,8 @@ ColorTable getTaskColorTable();
 
 ColorTable getCPUColorTable();
 
+ColorTable getStreamColorTable();
+
 Color getColor(ColorTable *colors, int pid);
 
 /** Represents an abstract graphical element. */
-- 
2.25.1


  parent reply index

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-04 17:46 [PATCH v8 00/44] Start KernelShark v2 transformation Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 01/44] kernel-shark: Adopt trace-cmd API changes Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 02/44] kernel-shark: Use libtraceevent and libtracefs Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 03/44] kernel-shark: Add license information Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 04/44] kernel-shark: Change the CMake minimum version required Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 05/44] kernel-shark: Change default libraries install location Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 06/44] kernel-shark: Split the installation in two components Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 07/44] kernel-shark: Update README Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 08/44] kernel-shark: Define build target for JSONC Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 09/44] kernel-shark: Use only signed types in kshark_entry Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 10/44] kernel-shark: Add stream_id to kshark_entry Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 11/44] kernel-shark: Introduce libkshark-hash Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 12/44] kernel-shark: Introduce Data streams Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 13/44] kernel-shark: Rename static methods in libkshark Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 14/44] kernel-shark: Add basic methods for Data streams Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 15/44] kernel-shark: Housekeeping before implementing stream interface Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 16/44] kernel-shark: Add stream interface for trace-cmd data Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 17/44] kernel-shark: Start introducing KernelShark 2.0 Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 18/44] kernel-shark: Start using data streams Yordan Karadzhov (VMware)
2021-01-04 17:46 ` [PATCH v8 19/44] kernel-shark: Remove dead code Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 20/44] kernel-shark: Redesign the plugin interface Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 21/44] kernel-shark: Complete the stream integration Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 22/44] kernel-shark: Provide merging of multiple data streams Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 23/44] kernel-shark: Integrate the stream definitions with data model Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 24/44] kernel-shark: Use only signed types for model defs Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 25/44] kernel-shark: Add ksmodel_get_bin() Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 26/44] kernel-shark: Protect ksmodel_set_in_range_bining() Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 27/44] kernel-shark: Add methods for time calibration Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 28/44] kernel-shark: Integrate streams with libkshark-configio Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 29/44] kernel-shark: Add support for drawing text Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 30/44] kernel-shark: Make GLUT optional dependency Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 31/44] kernel-shark: Add ksplot_draw_polyline() Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 32/44] kernel-shark: Optimize ksplot_draw_polygon() Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 33/44] kernel-shark: Add basic infrastructure for testing Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 34/44] kernel-shark: Add "github Actions" workflow Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 35/44] kernel-shark: Integrate streams with KsPlotTools Yordan Karadzhov (VMware)
2021-01-04 17:47 ` Yordan Karadzhov (VMware) [this message]
2021-01-04 17:47 ` [PATCH v8 37/44] kernel-shark: Redefine the args of KsPlot::getColor() Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 38/44] kernel-shark: Add TextBox class to KsPlot namespace Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 39/44] kernel-shark: Consistent method naming in KsPlotTools Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 40/44] kernel-shark: Make the label part of the graph Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 41/44] kernel-shark: Remove the hard-coded Idle PID Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 42/44] kernel-shark: Add class Polyline to KsPlot namespace Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 43/44] kernel-shark: Add VirtBridge and VirtGap classes Yordan Karadzhov (VMware)
2021-01-04 17:47 ` [PATCH v8 44/44] kernel-shark: Add double click interface to PlotObject Yordan Karadzhov (VMware)
2021-01-05  0:27 ` [PATCH v8 00/44] Start KernelShark v2 transformation Steven Rostedt

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