Mon 14 Oct 23:06:38 CEST 2024

kernel/bitmap.c

@@ -0,0 +1,45 @@
+/*
+Copyright (C) 2016-2019 The University of Notre Dame
+This software is distributed under the GNU General Public License.
+See the file LICENSE for details.
+*/
+
+#include "bitmap.h"
+#include "kernelcore.h"
+#include "kmalloc.h"
+
+static struct bitmap root_bitmap;
+
+struct bitmap *bitmap_create_root()
+{
+	root_bitmap.width = video_xres;
+	root_bitmap.height = video_yres;
+	root_bitmap.format = BITMAP_FORMAT_RGB;
+	root_bitmap.data = video_buffer;
+	return &root_bitmap;
+}
+
+struct bitmap *bitmap_create(int width, int height, int format)
+{
+	struct bitmap *b = kmalloc(sizeof(*b));
+	if(!b)
+		return 0;
+
+	b->data = kmalloc(width * height * 3);
+	if(!b->data) {
+		kfree(b);
+		return 0;
+	}
+
+	b->width = width;
+	b->height = height;
+	b->format = format;
+
+	return b;
+}
+
+void bitmap_delete(struct bitmap *b)
+{
+	kfree(b->data);
+	kfree(b);
+}