1 files changed, 81 insertions, 0 deletions
diff --git a/src/gl/drawing.c b/src/gl/drawing.c
new file mode 100644
index 0000000..e6b1e13
--- /dev/null
+++ b/src/gl/drawing.c
@@ -0,0 +1,81 @@
+#include "gl/glad/glad.h"
+#include <GLFW/glfw3.h>
+#include <lua.h>
+#include <honeysuckle.h>
+#include "util/util.h"
+
+int gl_set_viewport(lua_State *L);
+int gl_draw_arrays(lua_State *L);
+int gl_draw_elements(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 tbl = hs_create_table(L,
+		/* functions */
+		hs_str_cfunc("DrawArrays", gl_draw_arrays),
+		hs_str_cfunc("DrawElements", gl_draw_elements),
+		hs_str_cfunc("ClearColor", gl_set_clear_color),
+		hs_str_cfunc("Clear", gl_clear),
+		hs_str_cfunc("Viewport", gl_set_viewport),
+
+		/******** enums ********/
+		/* rendering primitives */
+		hs_str_int("POINTS", GL_POINTS),
+		hs_str_int("LINES", GL_LINES),
+		hs_str_int("TRIANGLES", GL_TRIANGLES),
+
+		/* clear bitmasks */
+		hs_str_int("COLOR_BUFFER_BIT", GL_COLOR_BUFFER_BIT),
+		hs_str_int("DEPTH_BUFFER_BIT", GL_DEPTH_BUFFER_BIT),
+		hs_str_int("STENCIL_BUFFER_BIT", GL_STENCIL_BUFFER_BIT),
+	);
+
+	append_table(L, gl_index, tbl);
+	lua_pop(L, 1);
+}
+
+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_draw_elements(lua_State *L)
+{
+	lua_Integer mode, count, type, offset;
+	hs_parse_args(L, hs_int(mode), hs_int(count), hs_int(type), hs_int(offset));
+	glDrawElements(mode, count, type, (const void*)offset);
+	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;
+}