1 files changed, 112 insertions, 0 deletions
diff --git a/src/opengl/gl.c b/src/opengl/gl.c
new file mode 100644
index 0000000..b8da1ec
--- /dev/null
+++ b/src/opengl/gl.c
@@ -0,0 +1,112 @@
+#include <stdlib.h>
+#include <stdbool.h>
+#include <glad/glad.h>
+#include <GLFW/glfw3.h>
+#include <lua.h>
+#include <lauxlib.h>
+#include "util/util.h"
+#include "gl.h"
+
+/* needs to be here because glad uses macros to define glBufferData */
+#ifdef HONEY_TEST_H
+#undef glBufferData
+#define glBufferData mock_glBufferData_
+#endif
+
+
+int gl_init(lua_State *L);
+int glad_init(lua_State *L);
+int gl_terminate(lua_State *L);
+int gl_get_error(lua_State *L);
+int gl_enable(lua_State *L);
+int gl_disable(lua_State *L);
+
+void setup_gl(lua_State *L, int honey_index)
+{
+	struct honey_tbl_t tbl[] = {
+		/* functions */
+		H_FUNC("Init", gl_init),
+		H_FUNC("InitGlad", glad_init),
+		H_FUNC("Terminate", gl_terminate),
+		H_FUNC("GetError", gl_get_error),
+		H_FUNC("Enable", gl_enable),
+		H_FUNC("Disable", gl_disable),
+
+		/******** enums ********/
+		/* data types */
+		H_INT("UNSIGNED_BYTE", GL_UNSIGNED_BYTE),
+		H_INT("UNSIGNED_INT", GL_UNSIGNED_INT),
+		H_INT("INT", GL_INT),
+		H_INT("FLOAT", GL_FLOAT),
+
+		/* error types */
+		H_INT("NO_ERROR", GL_NO_ERROR),
+		H_INT("INVALID_ENUM", GL_INVALID_ENUM),
+		H_INT("INVALID_VALUE", GL_INVALID_VALUE),
+		H_INT("INVALID_OPERATION", GL_INVALID_OPERATION),
+		H_INT("INVALID_FRAMEBUFFER_OPERATION", GL_INVALID_FRAMEBUFFER_OPERATION),
+		H_INT("OUT_OF_MEMORY", GL_OUT_OF_MEMORY),
+
+		/* opengl capabilities */
+		H_INT("DEPTH_TEST", GL_DEPTH_TEST),
+		H_INT("CULL_FACE", GL_CULL_FACE),
+
+		H_END
+	};
+	create_table(L, tbl);
+	int gl_index = lua_gettop(L);
+
+	setup_shader(L, gl_index);
+	setup_drawing(L, gl_index);
+	setup_data(L, gl_index);
+	setup_texture(L, gl_index);
+
+	lua_setfield(L, honey_index, "gl");
+}
+
+
+int gl_init(lua_State *L)
+{
+	if (!glfwInit()) {
+		luaL_error(L, "failed to initialize GLFW");
+	}
+	return 0;
+}
+
+
+int glad_init(lua_State *L)
+{
+	if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
+		luaL_error(L, "failed to initialize GLAD");
+	}
+}
+
+
+int gl_terminate(lua_State *L)
+{
+	glfwTerminate();
+	return 0;
+}
+
+
+int gl_get_error(lua_State *L)
+{
+	lua_pushinteger(L, glGetError());
+	return 1;
+}
+
+
+int gl_enable(lua_State *L)
+{
+	lua_Integer cap = luaL_checkinteger(L, 1);
+	glEnable(cap);
+	return 0;
+}
+
+
+int gl_disable(lua_State *L)
+{
+	lua_Integer cap = luaL_checkinteger(L, 1);
+	glDisable(cap);
+	return 0;
+}