repo init. partial port of existing code

1 files changed, 58 insertions, 0 deletions

diff --git a/src/systems/text.h b/src/systems/text.h
new file mode 100644
index 0000000..3c580df
--- /dev/null
+++ b/src/systems/text.h
@@ -0,0 +1,58 @@
+/**
+ * @brief
+ */
+#pragma once
+
+#include <stb_truetype.h>
+
+#include "darray.h"
+#include "defines.h"
+#include "render_types.h"
+
+struct core;
+typedef struct texture_handle {
+  u32 raw
+} texture_handle;
+typedef struct shader {
+  u32 raw
+} shader;
+
+/** @brief internal font struct */
+typedef struct font {
+  const char *name;
+  stbtt_fontinfo stbtt_font;
+  stbtt_bakedchar c_data[96];
+  texture_handle bitmap_tex;
+} font;
+
+typedef struct draw_text_packet {
+  char *contents;
+  f32 x;
+  f32 y;
+} draw_text_packet;
+
+KITC_DECL_TYPED_ARRAY(draw_text_packet)
+
+typedef struct text_system_state {
+  font default_font;
+  shader glyph_shader;
+  u32 glyph_vbo;
+  u32 glyph_vao;
+  draw_text_packet_darray *draw_cmd_buf;
+  // TODO: fonts array or hashtable
+} text_system_state;
+
+void text_system_render(text_system_state *text);
+
+// --- Lifecycle functions
+bool text_system_init(text_system_state *text);
+void text_system_shutdown(text_system_state *text);
+
+// --- Drawing
+
+/**
+ * @brief immediate mode draw text.
+ * @note immediately emits draw calls causing a shader program switch if you weren't previously
+         drawing text in the current frame.
+*/
+void draw_text(struct core *core, f32 x, f32 y, char *contents);
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