:wMerge branch 'gl-window' into main

1 files changed, 83 insertions, 0 deletions

diff --git a/src/gl/gl.c b/src/gl/gl.c
new file mode 100644
index 0000000..4639d48
--- /dev/null
+++ b/src/gl/gl.c
@@ -0,0 +1,83 @@
+#include <stdlib.h>
+#include <stdbool.h>
+#include "gl/glad/glad.h"
+#include <GLFW/glfw3.h>
+#include <lua.h>
+#include <honeysuckle.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);
+
+void setup_gl(lua_State *L, int honey_index)
+{
+	int gl_index = hs_create_table(L,
+		/* functions */
+		hs_str_cfunc("Init", gl_init),
+		hs_str_cfunc("InitGlad", glad_init),
+		hs_str_cfunc("Terminate", gl_terminate),
+		hs_str_cfunc("GetError", gl_get_error),
+
+		/******** enums ********/
+		/* data types */
+		hs_str_int("UNSIGNED_BYTE", GL_UNSIGNED_BYTE),
+		hs_str_int("UNSIGNED_INT", GL_UNSIGNED_INT),
+		hs_str_int("INT", GL_INT),
+		hs_str_int("FLOAT", GL_FLOAT),
+
+		/* error types */
+		hs_str_int("NO_ERROR", GL_NO_ERROR),
+		hs_str_int("INVALID_ENUM", GL_INVALID_ENUM),
+		hs_str_int("INVALID_VALUE", GL_INVALID_VALUE),
+		hs_str_int("INVALID_OPERATION", GL_INVALID_OPERATION),
+		hs_str_int("INVALID_FRAMEBUFFER_OPERATION", GL_INVALID_FRAMEBUFFER_OPERATION),
+		hs_str_int("OUT_OF_MEMORY", GL_OUT_OF_MEMORY),
+	);
+
+	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()) {
+		hs_throw_error(L, "failed to initialize GLFW");
+	}
+	return 0;
+}
+
+
+int glad_init(lua_State *L)
+{
+	if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
+		hs_throw_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;
+}