Reorganize source to separate private implementation details

Taking a page from C++ convention, where "detail" is for things that should not
be included in user code.

15 files changed, 83 insertions, 43 deletions

diff --git a/pugl/cairo_gl.h b/pugl/detail/cairo_gl.h
index b6e8566..b6e8566 100644
--- a/pugl/cairo_gl.h
+++ b/pugl/detail/cairo_gl.h
diff --git a/pugl/pugl_internal.h b/pugl/detail/implementation.c
index 18d7a7a..5cd7ce5 100644
--- a/pugl/pugl_internal.h
+++ b/pugl/detail/implementation.c
@@ -15,21 +15,15 @@
 */
 
 /**
-   @file pugl_internal.h Platform-independent implementation.
-
-   Note that this file contains function definitions, so it must be compiled
-   into the final binary exactly once.  Each platform specific implementation
-   file including it once should achieve this.
+   @file implementation.c Platform-independent implementation.
 */
 
+#include "pugl/detail/implementation.h"
 #include "pugl/pugl.h"
-#include "pugl/pugl_internal_types.h"
 
 #include <stdlib.h>
 #include <string.h>
 
-PuglInternals* puglInitInternals(void);
-
 static PuglHints
 puglDefaultHints(void)
 {
@@ -222,7 +216,7 @@ puglSetEventFunc(PuglView* view, PuglEventFunc eventFunc)
 }
 
 /** Return the code point for buf, or the replacement character on error. */
-static inline uint32_t
+uint32_t
 puglDecodeUTF8(const uint8_t* buf)
 {
 #define FAIL_IF(cond) do { if (cond) return 0xFFFD; } while (0)
@@ -255,7 +249,7 @@ puglDecodeUTF8(const uint8_t* buf)
 	return 0xFFFD;
 }
 
-static void
+void
 puglDispatchEvent(PuglView* view, const PuglEvent* event)
 {
 	switch (event->type) {
diff --git a/pugl/detail/implementation.h b/pugl/detail/implementation.h
new file mode 100644
index 0000000..50f54f5
--- /dev/null
+++ b/pugl/detail/implementation.h
@@ -0,0 +1,46 @@
+/*
+  Copyright 2012-2019 David Robillard <http://drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+/**
+   @file implementation.h Shared declarations for implementation.
+*/
+
+#ifndef PUGL_DETAIL_IMPLEMENTATION_H
+#define PUGL_DETAIL_IMPLEMENTATION_H
+
+#include "pugl/detail/types.h"
+#include "pugl/pugl.h"
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Allocate and initialise internals (implemented once per platform) */
+PuglInternals* puglInitInternals(void);
+
+/** Return the Unicode code point for `buf` or the replacement character. */
+uint32_t puglDecodeUTF8(const uint8_t* buf);
+
+/** Dispatch `event` to `view`, optimising configure/expose if possible. */
+void puglDispatchEvent(PuglView* view, const PuglEvent* event);
+
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+
+#endif // PUGL_DETAIL_IMPLEMENTATION_H
diff --git a/pugl/pugl_osx.m b/pugl/detail/mac.m
index a5ec994..83adcd1 100644
--- a/pugl/pugl_osx.m
+++ b/pugl/detail/mac.m
@@ -16,18 +16,18 @@
 */
 
 /**
-   @file pugl_osx.m MacOS implementation.
+   @file mac.m MacOS implementation.
 */
 
 #define GL_SILENCE_DEPRECATION 1
 
+#include "pugl/detail/implementation.h"
 #include "pugl/gl.h"
 #include "pugl/pugl_gl_backend.h"
-#include "pugl/pugl_internal.h"
 
 #ifdef PUGL_HAVE_CAIRO
+#include "pugl/detail/cairo_gl.h"
 #include "pugl/pugl_cairo_backend.h"
-#include "pugl/cairo_gl.h"
 #endif
 
 #import <Cocoa/Cocoa.h>
diff --git a/pugl/pugl_internal_types.h b/pugl/detail/types.h
index 9a0bedc..0cf9a99 100644
--- a/pugl/pugl_internal_types.h
+++ b/pugl/detail/types.h
@@ -15,11 +15,11 @@
 */
 
 /**
-   @file pugl_internal_types.h Private platform-independent type definitions.
+   @file types.h Shared internal type definitions.
 */
 
-#ifndef PUGL_INTERNAL_TYPES_H
-#define PUGL_INTERNAL_TYPES_H
+#ifndef PUGL_DETAIL_TYPES_H
+#define PUGL_DETAIL_TYPES_H
 
 #include "pugl/pugl.h"
 
@@ -38,6 +38,7 @@
 /** Platform-specific internals. */
 typedef struct PuglInternalsImpl PuglInternals;
 
+/** View hints. */
 typedef struct {
 	int  context_version_major;
 	int  context_version_minor;
@@ -76,7 +77,7 @@ struct PuglViewImpl {
 	bool               visible;
 };
 
-/** Opaque surface used by draw context. */
+/** Opaque surface used by graphics backend. */
 typedef void PuglSurface;
 
 /** Graphics backend interface. */
@@ -103,4 +104,4 @@ struct PuglBackendImpl {
 	void* (*getContext)(PuglView*);
 };
 
-#endif // PUGL_INTERNAL_TYPES_H
+#endif // PUGL_DETAIL_TYPES_H
diff --git a/pugl/pugl_win.c b/pugl/detail/win.c
index 2dd3fcc..953c620 100644
--- a/pugl/pugl_win.c
+++ b/pugl/detail/win.c
@@ -15,11 +15,11 @@
 */
 
 /**
-   @file pugl_win.c Windows implementation.
+   @file win.c Windows implementation.
 */
 
-#include "pugl/pugl_internal.h"
-#include "pugl/pugl_win.h"
+#include "pugl/detail/implementation.h"
+#include "pugl/detail/win.h"
 
 #include <windows.h>
 #include <windowsx.h>
diff --git a/pugl/pugl_win.h b/pugl/detail/win.h
index c2dba2a..9af5cbb 100644
--- a/pugl/pugl_win.h
+++ b/pugl/detail/win.h
@@ -15,10 +15,10 @@
 */
 
 /**
-   @file pugl_win.h Shared definitions for Windows implementation.
+   @file win.h Shared definitions for Windows implementation.
 */
 
-#include "pugl/pugl_internal_types.h"
+#include "pugl/detail/implementation.h"
 
 #include <windows.h>
 
diff --git a/pugl/pugl_win_cairo.c b/pugl/detail/win_cairo.c
index 0d2fb5f..c322f25 100644
--- a/pugl/pugl_win_cairo.c
+++ b/pugl/detail/win_cairo.c
@@ -15,12 +15,12 @@
 */
 
 /**
-   @file pugl_win_cairo.c Cairo graphics backend for Windows.
+   @file win_cairo.c Cairo graphics backend for Windows.
 */
 
+#include "pugl/detail/types.h"
+#include "pugl/detail/win.h"
 #include "pugl/pugl_cairo_backend.h"
-#include "pugl/pugl_internal_types.h"
-#include "pugl/pugl_win.h"
 
 #include <cairo-win32.h>
 #include <cairo.h>
diff --git a/pugl/pugl_win_gl.c b/pugl/detail/win_gl.c
index 17528d5..17ee68d 100644
--- a/pugl/pugl_win_gl.c
+++ b/pugl/detail/win_gl.c
@@ -15,12 +15,12 @@
 */
 
 /**
-   @file pugl_win_gl.c OpenGL graphics backend for Windows.
+   @file win_gl.c OpenGL graphics backend for Windows.
 */
 
+#include "pugl/detail/types.h"
+#include "pugl/detail/win.h"
 #include "pugl/pugl_gl_backend.h"
-#include "pugl/pugl_internal_types.h"
-#include "pugl/pugl_win.h"
 
 #include <windows.h>
 
diff --git a/pugl/pugl_x11.c b/pugl/detail/x11.c
index 5fcbd9f..70341ea 100644
--- a/pugl/pugl_x11.c
+++ b/pugl/detail/x11.c
@@ -17,13 +17,13 @@
 */
 
 /**
-   @file pugl_x11.c X11 implementation.
+   @file x11.c X11 implementation.
 */
 
 #define _POSIX_C_SOURCE 199309L
 
-#include "pugl/pugl_internal.h"
-#include "pugl/pugl_x11.h"
+#include "pugl/detail/implementation.h"
+#include "pugl/detail/x11.h"
 
 #include <X11/Xatom.h>
 #include <X11/Xlib.h>
diff --git a/pugl/pugl_x11.h b/pugl/detail/x11.h
index e104a15..98f42b0 100644
--- a/pugl/pugl_x11.h
+++ b/pugl/detail/x11.h
@@ -15,11 +15,10 @@
 */
 
 /**
-   @file pugl_x11.h Shared definitions for X11 implementation.
+   @file x11.h Shared definitions for X11 implementation.
 */
 
-#include "pugl/pugl.h"
-#include "pugl/pugl_internal_types.h"
+#include "pugl/detail/implementation.h"
 
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
diff --git a/pugl/pugl_x11_cairo.c b/pugl/detail/x11_cairo.c
index bcec626..97624a2 100644
--- a/pugl/pugl_x11_cairo.c
+++ b/pugl/detail/x11_cairo.c
@@ -15,12 +15,12 @@
 */
 
 /**
-   @file pugl_x11_cairo.c Cairo graphics backend for X11.
+   @file x11_cairo.c Cairo graphics backend for X11.
 */
 
+#include "pugl/detail/types.h"
+#include "pugl/detail/x11.h"
 #include "pugl/pugl_cairo_backend.h"
-#include "pugl/pugl_internal_types.h"
-#include "pugl/pugl_x11.h"
 
 #include <X11/Xutil.h>
 #include <cairo-xlib.h>
diff --git a/pugl/pugl_x11_gl.c b/pugl/detail/x11_gl.c
index 8ccc92d..7fcf169 100644
--- a/pugl/pugl_x11_gl.c
+++ b/pugl/detail/x11_gl.c
@@ -15,12 +15,12 @@
 */
 
 /**
-   @file pugl_x11_gl.c OpenGL graphics backend for X11.
+   @file x11_gl.c OpenGL graphics backend for X11.
 */
 
+#include "pugl/detail/implementation.h"
+#include "pugl/detail/x11.h"
 #include "pugl/pugl_gl_backend.h"
-#include "pugl/pugl_internal_types.h"
-#include "pugl/pugl_x11.h"
 
 #include <GL/gl.h>
 #include <GL/glx.h>
diff --git a/pugl/pugl.h b/pugl/pugl.h
index fab2b2b..903f1cb 100644
--- a/pugl/pugl.h
+++ b/pugl/pugl.h
@@ -15,7 +15,7 @@
 */
 
 /**
-   @file pugl.h Public API.
+   @file pugl.h Public Pugl API.
 */
 
 #ifndef PUGL_H_INCLUDED
diff --git a/pugl/pugl.hpp b/pugl/pugl.hpp
index ec96889..c2602dd 100644
--- a/pugl/pugl.hpp
+++ b/pugl/pugl.hpp
@@ -15,7 +15,7 @@
 */
 
 /**
-   @file pugl.hpp C++ wrapper for API.
+   @file pugl.hpp Public Pugl C++ API wrapper.
 */
 
 #ifndef PUGL_HPP_INCLUDED