1 files changed, 97 insertions, 0 deletions
diff --git a/lib/libgfx/src/gfx.c b/lib/libgfx/src/gfx.c
new file mode 100644
index 0000000..90dcb79
--- /dev/null
+++ b/lib/libgfx/src/gfx.c
@@ -0,0 +1,97 @@
+/*
+ * 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 <sys/mman.h>
+#include <sys/fbdev.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <libgfx/gfx.h>
+
+/*
+ * Initialize the libgfx context
+ *
+ * @res: Context pointer to be initialized
+ */
+int
+gfx_init(struct gfx_ctx *res)
+{
+    struct fbattr attr;
+    int fd, prot;
+
+    if (res == NULL) {
+        return -EINVAL;
+    }
+
+    /* Get framebuffer attributes */
+    fd = open("/ctl/fb0/attr", O_RDONLY);
+    if (fd < 0) {
+        gfx_log("could not open '/ctl/fb0/attr");
+        return fd;
+    }
+
+    read(fd, &attr, sizeof(attr));
+    close(fd);
+    res->fbdev = attr;
+
+    /* Open the framebuffer file */
+    res->fbfd = open("/dev/fb0", O_RDWR);
+    if (res->fbfd < 0) {
+        gfx_log("could not open '/dev/fb0'\n");
+        return res->fbfd;
+    }
+
+    /* Map the framebuffer into memory */
+    prot = PROT_READ | PROT_WRITE;
+    res->fb_size = attr.height * attr.pitch;
+    res->io = mmap(NULL, res->fb_size, prot, MAP_SHARED, res->fbfd, 0);
+
+    /* Did the mmap() call work? */
+    if (res->io == NULL) {
+        gfx_log("could not map framebuffer\n");
+        close(res->fbfd);
+        return -1;
+    }
+
+    return 0;
+}
+
+/*
+ * Cleanup all state and free the gfx
+ * context.
+ */
+void
+gfx_cleanup(struct gfx_ctx *ctx)
+{
+    if (ctx->io != NULL)
+        munmap(ctx->io, ctx->fb_size);
+    if (ctx->fbfd > 0)
+        close(ctx->fbfd);
+}