1 files changed, 71 insertions, 0 deletions
diff --git a/src/gl/drawing.c b/src/gl/drawing.c
new file mode 100644
index 0000000..a64f56d
--- /dev/null
+++ b/src/gl/drawing.c
@@ -0,0 +1,71 @@
+#include "gl/glad/glad.h"
+#include <GLFW/glfw3.h>
+#include <lua.h>
+#include <honeysuckle.h>
+
+int gl_set_viewport(lua_State *L);
+int gl_draw_arrays(lua_State *L);
+int gl_set_clear_color(lua_State *L);
+int gl_clear(lua_State *L);
+
+void setup_drawing(lua_State *L, int gl_index)
+{
+	int primitive_types = hs_create_table(L,
+		hs_str_int("points", GL_POINTS),
+		hs_str_int("lines", GL_LINES),
+		hs_str_int("triangles", GL_TRIANGLES),
+	);
+
+	int buffer_masks = hs_create_table(L,
+		hs_str_int("colorBuffer", GL_COLOR_BUFFER_BIT),
+		hs_str_int("depthBuffer", GL_DEPTH_BUFFER_BIT),
+		hs_str_int("stencilBuffer", GL_STENCIL_BUFFER_BIT),
+	);
+
+	hs_create_table(L,
+		hs_str_cfunc("drawArrays", gl_draw_arrays),
+		hs_str_cfunc("setClearColor", gl_set_clear_color),
+		hs_str_cfunc("clear", gl_clear),
+		hs_str_cfunc("setViewport", gl_set_viewport),
+
+		hs_str_tbl("primitiveType", primitive_types),
+		hs_str_tbl("bufferMask", buffer_masks),
+	);
+
+	lua_setfield(L, gl_index, "draw");
+}
+
+int gl_set_clear_color(lua_State *L)
+{
+	lua_Number r, g, b, a;
+	hs_parse_args(L, hs_num(r), hs_num(g), hs_num(b), hs_num(a));
+	glClearColor(r, g, b, a);
+	return 0;
+}
+
+
+int gl_clear(lua_State *L)
+{
+	lua_Integer mask;
+	hs_parse_args(L, hs_int(mask));
+	glClear(mask);
+	return 0;
+}
+
+
+int gl_draw_arrays(lua_State *L)
+{
+	lua_Integer mode, first, count;
+	hs_parse_args(L, hs_int(mode), hs_int(first), hs_int(count));
+	glDrawArrays(mode, first, count);
+	return 0;
+}
+
+
+int gl_set_viewport(lua_State *L)
+{
+	lua_Integer x, y, w, h;
+	hs_parse_args(L, hs_int(x), hs_int(y), hs_int(w), hs_int(h));
+	glViewport(x, y, w, h);
+	return 0;
+}