Subversion Repositories Kolibri OS

#include 

#include 

#include "images.hpp"

//Global const strings

const char HEADER_STRING[] = "Flappy bird";

const char CONTROL_STRING[] = "SPACEBAR TO JUMP";

const char GAMEOVER_STRING[] = "GAMEOVER";

const char ANY_KEY_STRING[] = "Press any key for restart";

const char SELECT_SPEED_STRING[] = "select the speed of the game";

const char FAST_STRING[] = "1 FAST";

const char SLOW_STRING[] = "2 SLOW";

//Global const variables

const int WINDOW_WIDTH = 400;

const int WINDOW_HEIGHT = 400;

const int BORDER_TOP = 24;

const int BORDER_LEFT = 5;

const int BORDER_RIGHT = 5;

const int BORDER_DOWN = 5;

enum GameState

{

	GAMESTATE_MENU,

	GAMESTATE_STARTED,

	GAMESTATE_GAMEOVER

};

struct ScreenSize

{

	int width;

	int height;

};

class Bird

{

public:

	static const int sizeX = 19;

	static const int sizeY = 20;

	static const int x = 100;

	int prev_y;

	int y;

	int acceleration;

	inline void initialize()

	{

		y = WINDOW_HEIGHT / 2;

		acceleration = 0;

	}

	inline void move()

	{

		if (acceleration <= 30)

			acceleration += 2;

		prev_y = y;

		y += acceleration / 10;

	}

	inline void jump()

	{

		acceleration = -50;

	}

	inline void draw()

	{

		kos_PutImage(birdImage, sizeX, sizeY, x, y);

	}

};

class Tube

{

public:

	static const int width = 50;

	static const int gapHeight = 100;

	static const int headHeight = 18;

	int x;

	int gapY;

	inline void randomize()

	{

		x = WINDOW_WIDTH + 1;

		gapY = rtlRand() % 200 + 50;

	}

	inline void move()

	{

		x -= 2;

		if (x < -width - 2)

			randomize();

	}

	void draw()

	{

		//cleanup

		int pixels = (WINDOW_WIDTH - (BORDER_LEFT + BORDER_RIGHT - 1)) - (x + width + 2);

		if (pixels >= -1)

		{

			pixels = (pixels == -1) ? 1 : 2;

			kos_DrawBar(x + width, gapY - headHeight, pixels, headHeight, 0x00FFFF);

			kos_DrawBar(x + width, gapY + gapHeight, pixels, headHeight, 0x00FFFF);

		}

		int offset = x >= 0 ? 0 : -x;

		int trim = x + width >= WINDOW_WIDTH - (BORDER_LEFT + BORDER_RIGHT - 1) ? WINDOW_WIDTH - x - width - (BORDER_LEFT + BORDER_RIGHT - 1) : 0;

		int trimHead = x + width >= WINDOW_WIDTH - (BORDER_LEFT + BORDER_RIGHT - 1) ? WINDOW_WIDTH - x - width - (BORDER_LEFT + BORDER_RIGHT - 1) : 0;

		//top

		for (int y = 0; y < gapY - headHeight; ++y)

			kos_PutImage(tubeBodyImage + offset, width - offset + trim, 1, x + offset, y);

		//head top

		for (int y = gapY - headHeight; y < gapY; ++y)

			kos_PutImage(tubeHeadImage + width * (y - (gapY - headHeight)) + offset, width - offset + trimHead, 1, x + offset, y);

		//head down

		for (int y = gapY + gapHeight; y < gapY + gapHeight + headHeight; ++y)

			kos_PutImage(tubeHeadImage + width * (y - (gapY + gapHeight)) + offset, width - offset + trimHead, 1, x + offset, y);

		//down

		for (int y = gapY + gapHeight + headHeight; y < WINDOW_HEIGHT - (BORDER_TOP + BORDER_DOWN - 1); ++y)

			kos_PutImage(tubeBodyImage + offset, width - offset + trim, 1, x + offset, y);

	}

};

//Global variables

int loopDelay;

GameState gameState;

char scoreString[] = "Score:    ";

bool scoreChanged;

int score;

Bird bird;

int tubeNumber;

Tube tubes[3];

int windowX;

int windowY;

//Function prototypes

void kos_Main();

void startGame();

ScreenSize getScreenSize();

void updateScoreString();

void WriteBorderedText(Word x, Word y, Byte fontType, Dword textColor, const char* textPtr, Dword textLen, Dword borderColor, int borderSize);

inline bool checkAddScore(Tube tube);

inline bool checkCollision(Tube tube);

void drawMenuWindow();

void drawGameWindow();

void redrawGameWindow();

void drawGameoverWindow();

//Functions

void startGame()

{

	kos_SetMaskForEvents(0x7); /// 111 in binary

	bird.initialize();

	score = 0;

	memset((Byte*)scoreString + 6, ' ', 3);

	updateScoreString();

	tubeNumber = 1;

	tubes[0].randomize();

	gameState = GAMESTATE_STARTED;

	drawGameWindow();

}

ScreenSize getScreenSize()

{

	Dword result;

	__asm {

		push 14		//System function 14

		pop eax

		int 0x40

		mov result, eax

	}

	ScreenSize screenSize;

	screenSize.height = (result & 0xFFFF) + 1;	//last two bytes

	screenSize.width = (result >> 16) + 1;		//first two bytes

	return screenSize;

}

void kos_Main()

{

	rtlSrand( kos_GetSystemClock() );

	//Centring window

	ScreenSize screenSize = getScreenSize();

	windowX = (screenSize.width - WINDOW_WIDTH) / 2;

	windowY = (screenSize.height - WINDOW_HEIGHT) / 2;

	gameState = GAMESTATE_MENU;

	kos_SetMaskForEvents(0x27); // 100111 in binary

	while( true )

	{

		switch (gameState)

		{

		case GAMESTATE_STARTED:

			kos_Pause(loopDelay);

			bird.move();

			//Adding new tubes

			if ((tubeNumber == 1 || tubeNumber == 2) && (tubes[tubeNumber - 1].x < (WINDOW_WIDTH - WINDOW_WIDTH / 3)))

				tubes[tubeNumber++].randomize();

			//Processing all tubes

			scoreChanged = false;

			for (int i = 0; i < tubeNumber; ++i)

			{

				//Adding score

				if (checkAddScore(tubes[i]))

				{

					++score;

					scoreChanged = true;

				}

				//Check collision with bird

				if (checkCollision(tubes[i]))

				{

					gameState = GAMESTATE_GAMEOVER;

					continue;

				}

				//Move tube

				tubes[i].move();

			}

			if (scoreChanged)

				updateScoreString();

			//Cheking the bird is too high or low

			if (bird.y + bird.sizeY > WINDOW_HEIGHT - (BORDER_TOP + BORDER_DOWN - 1) || bird.y < 0)

			{

				gameState = GAMESTATE_GAMEOVER;

				continue;

			}

			redrawGameWindow();

			switch (kos_CheckForEvent())

			{

			case 1:

				drawGameWindow();

				break;

			case 2: // key pressed

				Byte keyCode;

				kos_GetKey(keyCode);

				if (keyCode == 32) //if pressed key is spacebar

					bird.jump();

				break;

			case 3: // button pressed; we have only one button, close

				kos_ExitApp();

			}

			break;

		case GAMESTATE_GAMEOVER:

			drawGameoverWindow();

			switch (kos_WaitForEvent())

			{

			case 1:

				drawGameoverWindow();

				break;

			case 2:

				startGame();

				break;

			case 3:

				kos_ExitApp();

			}

			break;

		case GAMESTATE_MENU:

			switch (kos_WaitForEvent())

			{

			case 1:

				drawMenuWindow();

				break;

			case 2:

				Byte keyCode;

				kos_GetKey(keyCode);

				if (keyCode == 0x31 || keyCode == 0x61)	//1 or NumPad1

				{

					loopDelay = 1;

					startGame();

				}

				else if (keyCode == 0x32 || keyCode == 0x62) //2 or NumPad2

				{

					loopDelay = 2;

					startGame();

				}

				break;

			case 3:

				kos_ExitApp();

			case 6:

				Dword result;

				__asm {

					push 37 //Function 37 - work with mouse

					pop eax

					mov ebx, 3 //Subfunction 3 - states and events of the mouse buttons

					int 0x40

					mov result, eax

				}

				result &= 0x100; //bit 8 is set = left button is pressed

				if ( result )

				{

					Dword coordinates;

					__asm {

						push 37	//Function 37 - work with mouse

						pop eax

						mov ebx, 1 //Subfunction 1 - coordinates of the mouse relative to the window

						int		0x40

						mov coordinates, eax

					}

					int clickX = coordinates >> 16;

					int clickY = coordinates & 0xFFFF;

					if (clickX >= 100 && clickX < 390 && clickY >= 170 && clickY < 230)

					{

						loopDelay = 1;

						startGame();

					}

					else if (clickX >= 100 && clickX < 390 && clickY >= 270 && clickY < 330)

					{

						loopDelay = 2;

						startGame();

					}

				}

				break;

			}

			break;

		}

	}

}

void drawGameWindow()

{

	kos_DefineAndDrawWindow(windowX, windowY, WINDOW_WIDTH, WINDOW_HEIGHT, 0x33, 0x00FFFF, 0, 0, (Dword)HEADER_STRING);

	bird.draw();

	for (int i = 0; i < tubeNumber; ++i)

		tubes[i].draw();

	kos_WriteTextToWindow(10, 10, 0x81, 0x000000, scoreString, 0);

	kos_WriteTextToWindow(10, 30, 0x81, 0x000000, CONTROL_STRING, 0);

}

void redrawGameWindow()

{

	//cleaning the screen

	if (scoreChanged)

		kos_DrawBar(80, 10, 50, 15, 0x00FFFF);

	if (bird.y > bird.prev_y)

		kos_DrawBar(bird.x, bird.prev_y, bird.sizeX, bird.y - bird.prev_y, 0x00FFFF);

	else

		kos_DrawBar(bird.x, bird.y + bird.sizeY, bird.sizeX, bird.prev_y - bird.y, 0x00FFFF);

	bird.draw();

	for (int i = 0; i < tubeNumber; ++i)

		tubes[i].draw();

	kos_WriteTextToWindow(10, 10, 0x81, 0x000000, scoreString, 0);

	kos_WriteTextToWindow(10, 30, 0x81, 0x000000, CONTROL_STRING, 0);

}

void drawGameoverWindow()

{

	kos_DefineAndDrawWindow(windowX, windowY, WINDOW_WIDTH, WINDOW_HEIGHT, 0x33, 0x000000, 0, 0, (Dword)HEADER_STRING);

	kos_WriteTextToWindow(125, 50, 0x82, 0xFFFFFF, GAMEOVER_STRING, 0);

	kos_WriteTextToWindow(135, 100, 0x81, 0xFFFFFF, scoreString, 0);

	kos_WriteTextToWindow(50, 150, 0x81, 0xFFFFFF, ANY_KEY_STRING, 0);

}

void WriteBorderedText(Word x, Word y, Byte fontType, Dword textColor, const char *textPtr, Dword textLen, Dword borderColor, int borderSize)

{

	kos_WriteTextToWindow(x - borderSize, y - borderSize, fontType, borderColor, textPtr, textLen);

	kos_WriteTextToWindow(x - borderSize, y + borderSize, fontType, borderColor, textPtr, textLen);

	kos_WriteTextToWindow(x + borderSize, y - borderSize, fontType, borderColor, textPtr, textLen);

	kos_WriteTextToWindow(x + borderSize, y + borderSize, fontType, borderColor, textPtr, textLen);

	kos_WriteTextToWindow(x, y, fontType, textColor, textPtr, textLen);

}

void drawMenuWindow()

{

	kos_DefineAndDrawWindow(windowX, windowY, WINDOW_WIDTH, WINDOW_HEIGHT, 0x33, 0x00FFFF, 0, 0, (Dword)HEADER_STRING);

	WriteBorderedText(85, 40, 0x4, 0xFFFFFF, HEADER_STRING, 6, 0x000000, 2);

	WriteBorderedText(185, 80, 0x84, 0xFFFFFF, HEADER_STRING + 7, 0, 0x000000, 2);

	RGB* pos = &tubeHeadImage[0];

	for (int x = 100 - 1; x >= 100 - Tube::headHeight; --x)

		for (int y = 170; y < 170 + Tube::width; ++y)

		{

			kos_PutPixel(x, y, (pos->r << 16) + (pos->g << 8) + (pos->b));	//first tube

			kos_PutPixel(x, y+100, (pos->r << 16) + (pos->g << 8) + (pos->b)); //second tube

			++pos;

		}

	//First button

	for(int x = 100; x < WINDOW_WIDTH - (BORDER_LEFT + BORDER_RIGHT - 1); ++x)

		kos_PutImage(tubeBodyImage, 1, Tube::width, x, 170);

	WriteBorderedText(140, 185, 0x82, 0x000000, FAST_STRING, 0, 0xFFFFFF, 1);

	//Second button

	for (int x = 100; x < WINDOW_WIDTH - (BORDER_LEFT + BORDER_RIGHT - 1); ++x)

		kos_PutImage(tubeBodyImage, 1, Tube::width, x, 270);

	WriteBorderedText(140, 285, 0x82, 0x000000, SLOW_STRING, 0, 0xFFFFFF, 1);

}

inline bool checkCollision(Tube tube)

{

	return ((tube.x <= (bird.x + bird.sizeX) && tube.x + tube.width >= bird.x)

		&& (bird.y <= tube.gapY || bird.y + bird.sizeY >= tube.gapY + tube.gapHeight));

}

inline bool checkAddScore(Tube tube)

{

	//int diff = bird.x - (tube.x + tube.width);

	//return diff == 0 || diff == 1;

	return ((bird.x - (tube.x + tube.width)) >> 1) == 0;

}

void updateScoreString()

{

	int temp = score;

	int index = 9;

	do {

		scoreString[index--] = temp % 10 + '0';

		temp /= 10;

	} while (temp > 0);

}