1 files changed, 96 insertions, 0 deletions
diff --git a/lib/libgfx/src/draw.c b/lib/libgfx/src/draw.c
new file mode 100644
index 0000000..49f2f53
--- /dev/null
+++ b/lib/libgfx/src/draw.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of Hyra nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/errno.h>
+#include <stdint.h>
+#include <libgfx/gfx.h>
+#include <libgfx/draw.h>
+
+/*
+ * Draw a classic square onto the screen.
+ *
+ * @ctx: Graphics context
+ * @shape: Square to draw
+ */
+static int
+gfx_draw_square(struct gfx_ctx *ctx, const struct gfx_shape *shape)
+{
+    struct fbattr fbdev;
+    off_t idx;
+    scrpos_t scr_width, scr_height;
+    scrpos_t x, y;
+
+    if (ctx == NULL || shape == NULL) {
+        return -EINVAL;
+    }
+
+    /* Grab screen dimensions */
+    fbdev = ctx->fbdev;
+    scr_width = fbdev.width;
+    scr_height = fbdev.height;
+
+    for (x = shape->x; x < shape->x + shape->width; ++x) {
+        for (y = shape->y; y < shape->y + shape->height; ++y) {
+            if (x >= scr_width || y >= scr_height) {
+                break;
+            }
+
+            idx = gfx_io_index(ctx, x, y);
+            ctx->io[idx] = shape->color;
+        }
+    }
+    return 0;
+}
+
+/*
+ * Draw a shape onto the screen
+ *
+ * @ctx: libgfx graphics context
+ * @shape: Shape to draw
+ *
+ * Returns 0 on success, otherwise a less than zero
+ * value on failure.
+ *
+ * All error codes follow POSIX errno. However if the value
+ * is -1, the requested shape to be drawn is not valid.
+ */
+int
+gfx_draw_shape(struct gfx_ctx *ctx, const struct gfx_shape *shape)
+{
+    if (ctx == NULL || shape == NULL) {
+        return -EINVAL;
+    }
+
+    switch (shape->type) {
+    case SHAPE_SQUARE:
+        return gfx_draw_square(ctx, shape);
+    }
+
+    return -1;
+}