This method provides a hash table that maps the stream Ids to
rainbow-like colors.
Signed-off-by: Yordan Karadzhov (VMware) <y.karadz@xxxxxxxxx>
---
src/KsPlotTools.cpp | 33 +++++++++++++++++++++++++++++++++
src/KsPlotTools.hpp | 2 ++
2 files changed, 35 insertions(+)
diff --git a/src/KsPlotTools.cpp b/src/KsPlotTools.cpp
index 113a6c0..7a0450b 100644
--- a/src/KsPlotTools.cpp
+++ b/src/KsPlotTools.cpp
@@ -182,6 +182,39 @@ 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..ab28f43 100644
--- a/src/KsPlotTools.hpp
+++ b/src/KsPlotTools.hpp
@@ -78,6 +78,8 @@ ColorTable getTaskColorTable();
ColorTable getCPUColorTable();
+ColorTable getStreamColorTable();
+
Color getColor(ColorTable *colors, int pid);
/** Represents an abstract graphical element. */
--
2.25.1
|