libgfx: draw: Add gfx_plot_point() pixel plotting

Implement mechanism that allows one to plot pixels on the screen with a
specific color at specific x/y coordinates.

Example:
--
struct gfx_point p = {
    .x = 150,
    .y = 200,
    .color = GFX_GREEN
};

/* Draw green point at (150,200) */
gfx_plot_point(&ctx, &p);
--

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/lib/libgfx/include/libgfx/draw.h b/lib/libgfx/include/libgfx/draw.h
index 3bd013a..9f56f6c 100644
--- a/lib/libgfx/include/libgfx/draw.h
+++ b/lib/libgfx/include/libgfx/draw.h
@@ -89,7 +89,20 @@ struct gfx_shape {
     dimm_t height;
 };
 
+/*
+ * A point or single pixel that
+ * may be plotted onto the screen.
+ *
+ * @x,y: Position of the point on the screen
+ * @rgb: Color of the point (RGB)
+ */
+struct gfx_point {
+    scrpos_t x, y;
+    color_t rgb;
+};
+
 int gfx_draw_shape(struct gfx_ctx *ctx, const struct gfx_shape *shape);
+int gfx_plot_point(struct gfx_ctx *ctx, const struct gfx_point *point);
 
 __always_inline static inline size_t
 gfx_io_index(struct gfx_ctx *ctx, scrpos_t x, scrpos_t y)