initial chunk rendering

1 files changed, 147 insertions, 0 deletions

diff --git a/src/window.c b/src/window.c
new file mode 100644
index 0000000..c7e83c6
--- /dev/null
+++ b/src/window.c
@@ -0,0 +1,147 @@
+#include <GL/glew.h>
+#include <GLFW/glfw3.h>
+#include <string.h>
+
+#include "voxel.h"
+#include "window.h"
+
+Window window;
+double delta_time;
+
+static void key_callback(GLFWwindow *, int key, int, int action, int)
+{
+	switch (action) {
+	case GLFW_PRESS:
+		window.key_down[key] = true;
+		window.key_pressed[key] = true;
+		break;
+	case GLFW_RELEASE:
+		window.key_down[key] = false;
+		break;
+	}
+}
+
+static void mouse_move_callback(GLFWwindow *, double xpos, double ypos)
+{
+	window.mouse_x_last = window.mouse_x;
+	window.moues_y_last = window.mouse_y;
+	window.mouse_x = xpos;
+	window.mouse_y = ypos;
+}
+
+static void mouse_button_callback(GLFWwindow *, int button, int action, int)
+{
+	switch (action) {
+	case GLFW_PRESS:
+		window.btn_down[button] = true;
+		window.btn_pressed[button] = true;
+		break;
+	case GLFW_RELEASE:
+		window.btn_down[button] = false;
+		break;
+	}
+}
+
+static void framebuffer_callback(GLFWwindow *, int width, int height)
+{
+	window.width = width;
+	window.height = height;
+	glViewport(0, 0, width, height);
+}
+
+int window_init(void)
+{
+	if (glfwInit() == GLFW_FALSE) {
+		ERROR("GLFW failed to initalize");
+		return 1;
+	}
+
+	memset(&window, 0, sizeof(Window));
+	delta_time = 0;
+
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+
+	window.monitor = glfwGetPrimaryMonitor();
+	window.window = glfwCreateWindow(WINDOW_WIDTH, WINDOW_HEIGHT, WINDOW_TITLE,
+					 window.monitor, NULL);
+	if (window.window == NULL) {
+		ERROR("failed to create window");
+		return 1;
+	}
+
+	glfwMakeContextCurrent(window.window);
+	glfwSwapInterval(0);
+
+	glewExperimental = GL_TRUE;
+	if (glewInit() != GLEW_OK) {
+		ERROR("GLEW failed to initalize");
+		return 1;
+	}
+
+	glfwSetKeyCallback(window.window, key_callback);
+	glfwSetCursorPosCallback(window.window, mouse_move_callback);
+	glfwSetMouseButtonCallback(window.window, mouse_button_callback);
+	glfwSetFramebufferSizeCallback(window.window, framebuffer_callback);
+
+	return 0;
+}
+
+bool window_closed(void)
+{
+	return glfwWindowShouldClose(window.window) == GLFW_TRUE;
+}
+
+void window_update(void)
+{
+	// reset "pressed"
+	memset(&window.key_pressed, 0, sizeof(window.key_pressed));
+	memset(&window.btn_pressed, 0, sizeof(window.btn_pressed));
+
+	// update delta time
+	double time = glfwGetTime();
+	delta_time = time - window.last_time;
+	window.last_time = time;
+
+	// check for errors
+	GLenum error;
+	while ((error = glGetError()) != GL_NO_ERROR)
+		ERROR("OpenGL error: %d", error);
+
+	glfwPollEvents();
+}
+
+void window_swap(void)
+{
+	glfwSwapBuffers(window.window);
+}
+
+void window_close(void)
+{
+	glfwDestroyWindow(window.window);
+	glfwTerminate();
+}
+
+int window_grab_cursor(void);
+int window_release_cursor(void);
+
+bool key_down(int key)
+{
+	return window.key_down[key];
+}
+
+bool key_pressed(int key)
+{
+	return window.key_pressed[key];
+}
+
+bool btn_down(int btn)
+{
+	return window.btn_down[btn];
+}
+
+bool btn_pressed(int btn)
+{
+	return window.btn_pressed[btn];
+}