#include "instance.h"
#include "frame.h"

#include <EGL/egl.h>
#include <EGL/eglext.h>

#include "lvrc_internal.h"

#include "context.inl"

#include <malloc.h>

bool lvrcInitRenderingEGL(struct lvrcInstance * instance, EGLDisplay user_display, EGLContext user_context, EGLSurface user_surface)
{
	Instance * internalInstance = (Instance*)instance;

	if (!internalInstance->device)
	{
		return false;
	}

	static const EGLint attribs[] =
	{
		EGL_RED_SIZE, 8,
		EGL_GREEN_SIZE, 8,
		EGL_BLUE_SIZE, 8,
		//EGL_ALPHA_SIZE, 8,
		//EGL_DEPTH_SIZE, 16,
		EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
		EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
		EGL_NONE
	};

	static const EGLint context_attributes[] =
	{
		EGL_CONTEXT_CLIENT_VERSION, 2,
		EGL_NONE
	};

	//
	// Get Native Display
	EGLNativeDisplayType nativeDisplay = internalInstance->device;

	if (!nativeDisplay)
	{
		fprintf(stderr, "invalid native display\n");
		return false;
	}

	//
	// Get Native Window
	EGLNativeWindowType nativeWindow = internalInstance->surface;

	if (!nativeWindow)
	{
		fprintf(stderr, "invalid native window\n");
		return false;
	}

	EGLDisplay display;
	EGLSurface surface;
	EGLContext context;

	bool bContextCreated = create_context(EGL_PLATFORM_GBM_KHR, nativeDisplay, nativeWindow, attribs, context_attributes, NULL, &display, &context, &surface);

	if (!bContextCreated)
	{
		fprintf(stderr, "couldn't create compositor context\n");
		return false;
	}

	InitFrameResources(internalInstance);

	internalInstance->vr_display = display;
	internalInstance->vr_context = context;
	internalInstance->vr_surface = surface;

	internalInstance->user_display = user_display;
	internalInstance->user_context = user_context;
	internalInstance->user_surface = user_surface;

	eglMakeCurrent(user_display, user_surface, user_surface, user_context);

	return true;
}