media-libs/implot: new package, add 0.16

Signed-off-by: Gonçalo Negrier Duarte <gonegrier.duarte@gmail.com>

media-libs/implot/files/implot-0.16-wrapdb-meson-fix.diff

@@ -0,0 +1,64 @@
+# Meson wrapdb's meson.build file doesn't handle installing the library
+# and find imgui system library, we patch that here
+
+diff --git a/meson.build b/implot-0.16-meson.build
+index 3343dd4ad..804f84227 100644
+--- a/meson.build
++++ b/implot-0.16-meson.build
+@@ -5,8 +5,7 @@
+   version : '0.16',
+ )
+
+-imgui_sp = subproject('imgui')
+-imgui_dep = imgui_sp.get_variable('imgui_dep')
++imgui_dep=dependency('imgui', required : true)
+
+ implot_inc = include_directories('.')
+ implot_src = files(
+@@ -17,7 +16,19 @@
+ implot_lib = library(
+   'implot',
+   implot_src,
+-  dependencies: imgui_dep
++  dependencies: imgui_dep,
++  version: meson.project_version(),
++  install: true
++)
++
++pkg_mod = import('pkgconfig')
++pkg_mod.generate(implot_lib,
++  description : 'Immediate Mode Plotting'
++)
++
++install_headers(
++    'implot.h',
++    'implot_internal.h'
+ )
+
+ implot_dep = declare_dependency(
+diff --git a/implot.h b/implot.h
+index 3054331..856eb0c 100644
+--- a/implot.h
++++ b/implot.h
+@@ -45,7 +45,7 @@
+ // [SECTION] Obsolete API
+ 
+ #pragma once
+-#include "imgui.h"
++#include <imgui/imgui.h>
+ 
+ //-----------------------------------------------------------------------------
+ // [SECTION] Macros and Defines
+diff --git a/implot_internal.h b/implot_internal.h
+index cd05478..a189fcf 100644
+--- a/implot_internal.h
++++ b/implot_internal.h
+@@ -32,7 +32,7 @@
+ #pragma once
+
+ #include <time.h>
+-#include "imgui_internal.h"
++#include <imgui/imgui_internal.h>
+
+ #ifndef IMPLOT_VERSION
+ #error Must include implot.h before implot_internal.h