// Copyright (C) 2003 Dolphin Project.

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License 2.0 for more details.

// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/

// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/

#include "VideoConfig.h"
#include "Host.h"
#include "RenderBase.h"

#include "VertexShaderManager.h"
#include "../GLInterface.h"
#include "AGL.h"

void cInterfaceAGL::Swap()
{
	[GLWin.cocoaCtx flushBuffer];
}

// Show the current FPS
void cInterfaceAGL::UpdateFPSDisplay(const char *text)
{
	[GLWin.cocoaWin setTitle: [NSString stringWithUTF8String: text]];
}

// Create rendering window.
//		Call browser: Core.cpp:EmuThread() > main.cpp:Video_Initialize()
bool cInterfaceAGL::Create(void *&window_handle)
{
	int _tx, _ty, _twidth, _theight;
	Host_GetRenderWindowSize(_tx, _ty, _twidth, _theight);

	// Control window size and picture scaling
	s_backbuffer_width = _twidth;
	s_backbuffer_height = _theight;

	NSRect size;
	NSUInteger style = NSMiniaturizableWindowMask;
	NSOpenGLPixelFormatAttribute attr[2] = { NSOpenGLPFADoubleBuffer, 0 };
	NSOpenGLPixelFormat *fmt = [[NSOpenGLPixelFormat alloc]
		initWithAttributes: attr];
	if (fmt == nil) {
		ERROR_LOG(VIDEO, "failed to create pixel format");
		return NULL;
	}

	GLWin.cocoaCtx = [[NSOpenGLContext alloc]
		initWithFormat: fmt shareContext: nil];
	[fmt release];
	if (GLWin.cocoaCtx == nil) {
		ERROR_LOG(VIDEO, "failed to create context");
		return NULL;
	}

	if (SConfig::GetInstance().m_LocalCoreStartupParameter.bFullscreen) {
		size = [[NSScreen mainScreen] frame];
		style |= NSBorderlessWindowMask;
	} else {
		size = NSMakeRect(_tx, _ty, _twidth, _theight);
		style |= NSResizableWindowMask | NSTitledWindowMask;
	}

	GLWin.cocoaWin = [[NSWindow alloc] initWithContentRect: size
		styleMask: style backing: NSBackingStoreBuffered defer: NO];
	if (GLWin.cocoaWin == nil) {
		ERROR_LOG(VIDEO, "failed to create window");
		return NULL;
	}

	if (SConfig::GetInstance().m_LocalCoreStartupParameter.bFullscreen) {
		CGDisplayCapture(CGMainDisplayID());
		[GLWin.cocoaWin setLevel: CGShieldingWindowLevel()];
	}

	[GLWin.cocoaCtx setView: [GLWin.cocoaWin contentView]];
	[GLWin.cocoaWin makeKeyAndOrderFront: nil];

	return true;
}

bool cInterfaceAGL::MakeCurrent()
{
	[GLWin.cocoaCtx makeCurrentContext];
	return true;
}

// Update window width, size and etc. Called from Render.cpp
void cInterfaceAGL::Update()
{
	int width, height;

	width = [[GLWin.cocoaWin contentView] frame].size.width;
	height = [[GLWin.cocoaWin contentView] frame].size.height;
	if (width == s_backbuffer_width && height == s_backbuffer_height)
		return;

	[GLWin.cocoaCtx setView: [GLWin.cocoaWin contentView]];
	[GLWin.cocoaCtx update];
	[GLWin.cocoaCtx makeCurrentContext];
	s_backbuffer_width = width;
	s_backbuffer_height = height;
}

// Close backend
void cInterfaceAGL::Shutdown()
{
	[GLWin.cocoaWin close];
	[GLWin.cocoaCtx clearDrawable];
	[GLWin.cocoaCtx release];
}