Get AutoColor building in C

* Exported and hand-edited AutoColor.h. I eventually want this to be
automatic, but I don't have time for now
* Include stdbool for C support
* Pack colors for C support
* Link to libm for pow, round

.gitignore

@@ -42,4 +42,5 @@ lib/
 
 imgui.ini
 
-auto-color
+auto-color
+test/auto-color-test

Build.sh

@@ -16,5 +16,6 @@ CAKELISP=./Dependencies/cakelisp/bin/cakelisp
 $CAKELISP --execute --verbose-processes \
 		  src/Config_Linux.cake \
 		  src/AutoColorCLI.cake \
-		  src/CreateSingleFileLib.cake \
 	|| exit $?
+
+#src/CreateSingleFileLib.cake \

ReadMe.org

@@ -14,7 +14,7 @@ Similar to musical notes, colors look best in context. Auto Color ensures the ap
 * Applications
 When included in a C/C++ project, the color values can be used to theme the application to match the user's background automatically.
 
-In this example, an application I wrote using ImGui uses Auto Color to match the user's wallpaper at startup:
+In this example, an application I wrote using ImGui uses Auto Color to theme to the user's wallpaper:
 
 [[./images/ImGuiExample1.jpg]]
 
@@ -49,12 +49,16 @@ Here's a simple usage example:
       AutoColor base16Colors[16] = {0};
       if (!autoColorPickFromCurrentBackground(base16Colors))
           return 1;
-      fprintf(stderr "The first color is RGB %d, %d, %d\n"
+      fprintf(stderr, "The first color is RGB %d, %d, %d\n",
               base16Colors[0][0], base16Colors[0][1], base16Colors[0][2]);
       return 0;
   }
 #+END_SRC
 
+See the ~test/~ directory for a buildable example.
+
+Note that loading the wallpaper can take a relatively long time, depending on its resolution (long being around 200ms). If you are writing a real-time application, you should run ~autoColorPickFromCurrentBackground()~ on a separate thread than the render thread.
+
 ** Windows
 The desktop background is retrieved by checking the registry.
 

src/AutoColor.cake

@@ -3,7 +3,8 @@
 (c-import "<stdio.h>" ;; fprintf, strncmp
           "<stdlib.h>" ;; qsort
           "<string.h>" ;; memcmp
-          "<math.h>") ;; sqrtf
+          "<math.h>" ;; sqrtf, round
+          &with-decls "stdbool.h") ;; bool
 
 (var-global g-auto-color-copyright-string (* (const char))
             #"#Auto Color
@@ -301,7 +302,8 @@ OF THE POSSIBILITY OF SUCH DAMAGE.#"#)
                       (/ (- (field q w) (field q y))
                          (+ (* 6.0f c) color-conversion-epsilon))
                       (field q z))))
-  (return (array h c (field q x))))
+  (var packed-color auto-color-float (array h c (field q x)))
+  (return packed-color))
 
 (defun-local auto-color-rgb-to-hsl (rgb auto-color-float &return auto-color-float)
   (var HCV auto-color-float (auto-color-rgb-to-hcv rgb))
@@ -309,7 +311,8 @@ OF THE POSSIBILITY OF SUCH DAMAGE.#"#)
   (var S float (/ (field HCV y)
                   (+ (- 1.0f (fabs (- (* L 2.0f) 1.0f)))
                      color-conversion-epsilon)))
-  (return (array (field HCV x) S L)))
+  (var packed-color auto-color-float (array (field HCV x) S L))
+  (return packed-color))
 
 (defun-local test--auto-color-conversions (&return int)
   (var test-hsl auto-color-float (array 0.25f 0.8f 0.2f))

src/CreateSingleFileLib.cake

@@ -1,5 +1,12 @@
 (skip-build)
 
+;; TODO Create Single File:
+;; - Output module dependencies
+;; - Output all headers first, then all  source files
+;; - File shouldn't include any headers except stdlib ones
+;; - Cakelisp needs to export in C mode (typedef struct, NULL)
+;; - Copy stb_image.h to be inline
+;; - Remove #pragma once
 (defun-comptime create-single-file-lib (manager (& ModuleManager) link-command (& ProcessCommand)
                                         link-time-inputs (* ProcessCommandInput)
                                         num-link-time-inputs int
@@ -10,8 +17,6 @@
     (Log "error: failed to open single file header for writing\n")
     (return false))
 
-  (fprintf file-out "// Hello World\n")
-
   (for-in module (* Module) (field manager modules)
     (var standard-files-to-output ([] (* (const char)))
       (array (call-on c_str (path module > headerOutputName))

test/Build.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+gcc -c main.c -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I../ -I../Dependencies/stb || exit $?
+gcc -o auto-color-test main.o -lglib-2.0 -lgio-2.0 -lgobject-2.0 -lm || exit $?
+./auto-color-test

test/main.c

@@ -0,0 +1,13 @@
+#include <stdio.h>
+
+#include "AutoColor.h"
+
+int main()
+{
+	AutoColor base16Colors[16] = {0};
+	if (!autoColorPickFromCurrentBackground(base16Colors))
+		return 1;
+	fprintf(stderr, "The first color is RGB %d, %d, %d\n", base16Colors[0][0], base16Colors[0][1],
+	        base16Colors[0][2]);
+	return 0;
+}