Add basic bitmap font rendering

3 files changed, 29 insertions, 0 deletions

diff --git a/include/ubox.h b/include/ubox.h
index cbf8d98..25d44eb 100644
--- a/include/ubox.h
+++ b/include/ubox.h
@@ -9,6 +9,7 @@
 #include "ubox_joy.h"
 #include "ubox_control.h"
 #include "ubox_sound.h"
+#include "ubox_text.h"
 #include "ubox_assets.h"
 
 #endif /* _UBOX_H */
diff --git a/include/ubox_text.h b/include/ubox_text.h
new file mode 100644
index 0000000..49fef56
--- /dev/null
+++ b/include/ubox_text.h
@@ -0,0 +1,7 @@
+#ifndef _UBOX_TEXT_H
+#define _UBOX_TEXT_H
+
+void ubox_set_font(const uint8_t *pixdata);
+void ubox_put_text(uint16_t x, uint16_t y, const char *text, uint8_t color);
+
+#endif /* _TEXT_H */
diff --git a/src/text.c b/src/text.c
new file mode 100644
index 0000000..6cec4ad
--- /dev/null
+++ b/src/text.c
@@ -0,0 +1,21 @@
+#include <stdint.h>
+
+#include "ubox_vga.h"
+
+static const uint8_t *font;
+
+void ubox_set_font(const uint8_t *pixdata)
+{
+    font = pixdata;
+}
+
+void ubox_put_text(uint16_t x, uint16_t y, const char *text, uint8_t color)
+{
+    ubox_rect dst = { x, y, 8, 8};
+
+    while (*text)
+    {
+        ubox_blit_c(font + ((*text++ - ' ') << 6), &dst, color);
+        dst.x += 8;
+    }
+}