From 547fe6a908c2f777cf47e29b234ab8164f5edb60 Mon Sep 17 00:00:00 2001
From: Sam Hocevar <sam@hocevar.net>
Date: Wed, 8 Jan 2014 11:23:47 +0000
Subject: [PATCH] color: utility functions to convert vec3 colors to hex
 strings.

---
 src/Makefile.am             |  1 +
 src/image/color/color.cpp   | 45 +++++++++++++++++++++++++++++++++++++
 src/lol/image/color.h       | 10 ++++++++-
 src/lolcore.vcxproj         |  1 +
 src/lolcore.vcxproj.filters |  3 +++
 5 files changed, 59 insertions(+), 1 deletion(-)
 create mode 100644 src/image/color/color.cpp

diff --git a/src/Makefile.am b/src/Makefile.am
index 9d80c1a1..427b3b2c 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -110,6 +110,7 @@ liblolcore_sources = \
     image/codec/ios-image.cpp \
     image/codec/dummy-image.cpp \
     image/color/cie1931.cpp \
+    image/color/color.cpp \
     \
     loldebug.h \
     debug/fps.cpp debug/fps.h debug/lines.cpp \
diff --git a/src/image/color/color.cpp b/src/image/color/color.cpp
new file mode 100644
index 00000000..ba9ea517
--- /dev/null
+++ b/src/image/color/color.cpp
@@ -0,0 +1,45 @@
+//
+// Lol Engine
+//
+// Copyright: (c) 2010-2014 Sam Hocevar <sam@hocevar.net>
+//   This program is free software; you can redistribute it and/or
+//   modify it under the terms of the Do What The Fuck You Want To
+//   Public License, Version 2, as published by Sam Hocevar. See
+//   http://www.wtfpl.net/ for more details.
+//
+
+#if defined HAVE_CONFIG_H
+#   include "config.h"
+#endif
+
+#include "core.h"
+
+namespace lol
+{
+
+String Color::HexString4Bpp(vec3 c)
+{
+    uvec3 c2 = (uvec3)(clamp(c, 0.f, 1.f) * 255.0f);
+    return String::Printf("%01x%01x%01x", c2.r, c2.g, c2.b);
+}
+
+String Color::HexString4Bpp(vec4 c)
+{
+    uvec4 c2 = (uvec4)(clamp(c, 0.f, 1.f) * 255.0f);
+    return String::Printf("%01x%1x%01x%01x", c2.r, c2.g, c2.b, c2.a);
+}
+
+String Color::HexString8Bpp(vec3 c)
+{
+    uvec3 c2 = (uvec3)(clamp(c, 0.f, 1.f) * 255.0f);
+    return String::Printf("%02x%02x%02x", c2.r, c2.g, c2.b);
+}
+
+String Color::HexString8Bpp(vec4 c)
+{
+    uvec4 c2 = (uvec4)(clamp(c, 0.f, 1.f) * 255.0f);
+    return String::Printf("%02x%2x%02x%02x", c2.r, c2.g, c2.b, c2.a);
+}
+
+} /* namespace lol */
+
diff --git a/src/lol/image/color.h b/src/lol/image/color.h
index bc1ee49f..2a7923e6 100644
--- a/src/lol/image/color.h
+++ b/src/lol/image/color.h
@@ -1,7 +1,7 @@
 //
 // Lol Engine
 //
-// Copyright: (c) 2010-2013 Sam Hocevar <sam@hocevar.net>
+// Copyright: (c) 2010-2014 Sam Hocevar <sam@hocevar.net>
 //   This program is free software; you can redistribute it and/or
 //   modify it under the terms of the Do What The Fuck You Want To
 //   Public License, Version 2, as published by Sam Hocevar. See
@@ -277,6 +277,14 @@ public:
      * Convert a wavelength into an xyY fully saturated colour.
      */
     static vec3 WavelengthToCIExyY(float nm);
+
+    /*
+     * Convert colors to hex strings.
+     */
+    static String HexString4Bpp(vec3 c);
+    static String HexString4Bpp(vec4 c);
+    static String HexString8Bpp(vec3 c);
+    static String HexString8Bpp(vec4 c);
 };
 
 } /* namespace lol */
diff --git a/src/lolcore.vcxproj b/src/lolcore.vcxproj
index 64f3724e..538d2754 100644
--- a/src/lolcore.vcxproj
+++ b/src/lolcore.vcxproj
@@ -145,6 +145,7 @@
     <ClCompile Include="image\codec\ps3-image.cpp" />
     <ClCompile Include="image\codec\sdl-image.cpp" />
     <ClCompile Include="image\color\cie1931.cpp" />
+    <ClCompile Include="image\color\color.cpp" />
     <ClCompile Include="image\image.cpp" />
     <ClCompile Include="input\controller.cpp" />
     <ClCompile Include="input\input.cpp" />
diff --git a/src/lolcore.vcxproj.filters b/src/lolcore.vcxproj.filters
index 893166dc..3eaae1ce 100644
--- a/src/lolcore.vcxproj.filters
+++ b/src/lolcore.vcxproj.filters
@@ -291,6 +291,9 @@
     <ClCompile Include="image\color\cie1931.cpp">
       <Filter>image\color</Filter>
     </ClCompile>
+    <ClCompile Include="image\color\color.cpp">
+      <Filter>image\color</Filter>
+    </ClCompile>
     <ClCompile Include="math\geometry.cpp">
       <Filter>math</Filter>
     </ClCompile>