color: utility functions to convert vec3 colors to hex strings.

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 \

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 */
+

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 */

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" />

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>