Clean up pixel code (#137)

* Add missing Doxygen docs
* Apply astyle styling

Author: tuupola

include/hagl/pixel.h

@@ -50,9 +50,9 @@ extern "C" {
  * Output will be clipped to the current clip window.
  *
  * @param surface
- * @param x0
- * @param y0
- * @param color
+ * @param x0 X coordinate
+ * @param y0 Y coordinate
+ * @param color pixel color
  */
 void
 hagl_put_pixel(void const *surface, int16_t x0, int16_t y0, hagl_color_t color);
@@ -64,8 +64,8 @@ hagl_put_pixel(void const *surface, int16_t x0, int16_t y0, hagl_color_t color);
  * error or if HAL does not support this feature returns black.
  *
  * @param surface
- * @param x0
- * @param y0
+ * @param x0 X coordinate
+ * @param y0 Y coordinate
  * @return color at the given location
  */
 hagl_color_t

src/hagl_pixel.c

@@ -2,7 +2,7 @@
 
 MIT License
 
-Copyright (c) 2018-2023 Mika Tuupola
+Copyright (c) 2018-2026 Mika Tuupola
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -38,8 +38,7 @@ SPDX-License-Identifier: MIT
 #include "hagl/surface.h"
 
 void
-hagl_put_pixel(void const *_surface, int16_t x0, int16_t y0, hagl_color_t color)
-{
+hagl_put_pixel(void const *_surface, int16_t x0, int16_t y0, hagl_color_t color) {
     const hagl_surface_t *surface = _surface;
 
     /* x0 or y0 is before the edge, nothing to do. */
@@ -57,8 +56,7 @@ hagl_put_pixel(void const *_surface, int16_t x0, int16_t y0, hagl_color_t color)
 }
 
 hagl_color_t
-hagl_get_pixel(void const *_surface, int16_t x0, int16_t y0)
-{
+hagl_get_pixel(void const *_surface, int16_t x0, int16_t y0) {
     const hagl_surface_t *surface = _surface;
     /* x0 or y0 is before the edge, nothing to do. */
     if ((x0 < surface->clip.x0) || (y0 < surface->clip.y0))  {