--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/libmlk-core/core/painter.c	Fri Oct 01 20:30:00 2021 +0200
@@ -0,0 +1,115 @@
+/*
+ * painter.c -- basic drawing routines
+ *
+ * Copyright (c) 2020-2021 David Demelier <markand@malikania.fr>
+ *
+ * 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.
+ *
+ * THE 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.
+ */
+
+#include <math.h>
+
+#include "color.h"
+#include "painter.h"
+#include "texture.h"
+#include "window.h"
+#include "window_p.h"
+
+/* Current texture renderer. */
+static struct texture *renderer;
+
+struct texture *
+painter_get_target(void)
+{
+	return renderer;
+}
+
+void
+painter_set_target(struct texture *tex)
+{
+	renderer = tex;
+	SDL_SetRenderTarget(RENDERER(), tex ? tex->handle : NULL);
+}
+
+unsigned long
+painter_get_color(void)
+{
+	Uint8 r = 0, g = 0, b = 0, a = 0;
+
+	SDL_GetRenderDrawColor(RENDERER(), &r, &g, &b, &a);
+
+	return COLOR_HEX(r, g, b, a);
+}
+
+void
+painter_set_color(unsigned long color)
+{
+	SDL_SetRenderDrawColor(
+		RENDERER(),
+		COLOR_R(color),
+		COLOR_G(color),
+		COLOR_B(color),
+		COLOR_A(color)
+	);
+}
+
+void
+painter_draw_line(int x1, int y1, int x2, int y2)
+{
+	SDL_RenderDrawLine(RENDERER(), x1, y1, x2, y2);
+}
+
+void
+painter_draw_point(int x1, int y1)
+{
+	SDL_RenderDrawPoint(RENDERER(), x1, y1);
+}
+
+void
+painter_draw_rectangle(int x, int y, unsigned int width, unsigned int height)
+{
+	const SDL_Rect rect = {
+		.w = width,
+		.h = height,
+		.x = x,
+		.y = y
+	};
+
+	SDL_RenderFillRect(RENDERER(), &rect);
+}
+
+void
+painter_draw_circle(int x, int y, int radius)
+{
+	// Note that there is more to altering the bitrate of this 
+	// method than just changing this value.  See how pixels are
+	// altered at the following web page for tips:
+	//   http://www.libsdl.org/intro.en/usingvideo.html
+	for (double dy = 1; dy <= radius; dy += 1.0) {
+		double dx = floor(sqrt((2.0 * radius * dy) - (dy * dy)));
+
+		SDL_RenderDrawLine(RENDERER(), x - dx, y + dy - radius, x + dx, y + dy - radius);
+		SDL_RenderDrawLine(RENDERER(), x - dx, y - dy + radius, x + dx, y - dy + radius);
+	}
+}
+
+void
+painter_clear(void)
+{
+	SDL_RenderClear(RENDERER());
+}
+
+void
+painter_present(void)
+{
+	SDL_RenderPresent(RENDERER());
+}