This article introduces the implementation of a simple Gozi game using SDL2 on Android. It is shared with you for your reference. The specific content is as follows
1.
//
// SDL2 Goko Chess// gcc -mwindows -o Five -lSDL2 -lSDL2main -lSDL2_image -lSDL2_ttf
//#define _DEBUG_
#include <>
#include <>
#include <SDL2/>
#include <SDL2/SDL_image.h>
#include <SDL2/SDL_ttf.h>
#include ""
// Resource filechar szBackGroundFile[] = "Resource/"; // Chessboard background image filechar szBlackFile[] = "Resource/"; // Black chess piece image file (background color: white)char szWhiteFile[] = "Resource/"; // White chess piece image file (background color: white)char szFontFile[] = "Resource/"; // Font file// String constantschar szTitle[] = "Gozi";
char szBlack[] = "Black Side";
char szWhite[] = "Bai Fang";
char szGameTips[] = "The %d hand, it's %s turn to make it";
char szGameOver[] = "%s wins this game, please press the button to continue";
_Bool OnKeyUp(int x, int y, int nSpacing);
void DrawBoard(SDL_Renderer *pRenderer, int nSpacing, SDL_Color *pColor);
void DrawPieces(SDL_Renderer *pRenderer, int nSpacing, SDL_Texture *pBlackTexture, SDL_Texture *pWhiteTexture);
void PrintString(SDL_Renderer *pRenderer, int nSpacing, char *szString, TTF_Font *pFont, SDL_Color *pColor);
void FillCircle(SDL_Renderer *pRenderer, int x, int y, int r, SDL_Color *pColor);
SDL_Texture *GetImageTexture(SDL_Renderer *pRenderer, char *szFile, _Bool bTransparent, SDL_Color *pBackGroundColor);
SDL_Texture *GetStringTexture(SDL_Renderer *pRenderer, TTF_Font *pFont, char *szString, SDL_Color *pColor);
#undef main
int main(int argc, char **argv)
{
int nWindowWidth, nWindowHeight; // Screen size int nSpacing; // Chessboard line distance SDL_Window *pWindow = NULL; // Main window SDL_Renderer *pRenderer = NULL; // Main window renderer SDL_Texture *pBackTexture = NULL; // Checkerboard background image texture SDL_Texture *pBlackTexture = NULL; // Black chess piece drawing texture SDL_Texture *pWhiteTexture = NULL; // White chess piece drawing texture TTF_Font *pFont = NULL; // Prompt text font SDL_Event event; // event _Bool bRun = 1; // Continuously wait for event control loop identification char szString[256];
// Initialization if(SDL_Init(SDL_INIT_EVERYTHING)==-1 || IMG_Init(IMG_INIT_JPG)==-1 || TTF_Init()==-1)
{
#ifdef _DEBUG_
fprintf(stderr, "%s", SDL_GetError());
#endif
return 1;
}
// Create the main window and its renderer if(SDL_CreateWindowAndRenderer(0, 0, SDL_WINDOW_FULLSCREEN, &pWindow, &pRenderer)==-1)
{
#ifdef _DEBUG_
fprintf(stderr, "%s", SDL_GetError());
#endif
goto label_error;
}
SDL_SetWindowTitle(pWindow, szTitle);
SDL_GetWindowSize(pWindow, &nWindowWidth, &nWindowHeight);
nSpacing = SDL_min(nWindowWidth, nWindowHeight)/(MAX_LINES+2);
// Load the picture file if(NULL==(pBackTexture = GetImageTexture(pRenderer, szBackGroundFile, 0, NULL))
|| NULL==(pBlackTexture = GetImageTexture(pRenderer, szBlackFile, 1, NULL))
|| NULL==(pWhiteTexture = GetImageTexture(pRenderer, szWhiteFile, 1, NULL)))
{
#ifdef _DEBUG_
fprintf(stderr, "%s", SDL_GetError());
#endif
goto label_error;
}
// Load font file if(NULL == (pFont = TTF_OpenFont(szFontFile, 20))) // This 20 is the font size {
#ifdef _DEBUG_
fprintf(stderr, "%s", SDL_GetError());
#endif
goto label_error;
}
// Reset the chess game data and wait for events Five_ResetData();
while(bRun && SDL_WaitEvent(&event))
{
switch()
{
case SDL_FINGERUP : // Touch pops up if(g_iWho != NONE)
{
if(OnKeyUp(*nWindowWidth, *nWindowHeight, nSpacing) && Five_isFive())
g_iWho = NONE;
}
else
Five_ResetData();
// There is no break here; Fall down and repaint the window
case SDL_WINDOWEVENT : // If there is a window message, you need to repaint the window SDL_RenderClear(pRenderer);
SDL_RenderCopyEx(pRenderer, pBackTexture, NULL, NULL, 0, NULL, SDL_FLIP_NONE);
DrawBoard(pRenderer, nSpacing, NULL);
DrawPieces(pRenderer, nSpacing, pBlackTexture, pWhiteTexture);
if(g_iWho == NONE)
sprintf(szString, szGameOver, g_nHands%2==1 ? szBlack : szWhite);
else
sprintf(szString, szGameTips, g_nHands+1, g_iWho==BLACK ? szBlack : szWhite);
PrintString(pRenderer, nSpacing, szString, pFont, NULL);
SDL_RenderPresent(pRenderer);
break;
case SDL_QUIT :
bRun = 0;
break;
default :
break;
}
}
label_error:
// Clean up if(pBackTexture != NULL) SDL_DestroyTexture(pBackTexture);
if(pBlackTexture != NULL) SDL_DestroyTexture(pBlackTexture);
if(pWhiteTexture != NULL) SDL_DestroyTexture(pWhiteTexture);
if(pFont != NULL) TTF_CloseFont(pFont);
TTF_Quit();
IMG_Quit();
SDL_Quit();
return 0;
}
// Response to the drop button// Parameters: (x, y) = the clicked window coordinates, nSpacing = the chess line distance_Bool OnKeyUp(int x, int y, int nSpacing)
{
// Calculate the coordinates of the landing point int m = (x - 0.5*nSpacing)/nSpacing;
int n = (y - 0.5*nSpacing)/nSpacing;
// Process effective landing points if(m>=0 && m<MAX_LINES && n>=0 && n<MAX_LINES && g_iBoard[m][n]==NONE)
{
Five_AddPiece(m, n, g_iWho);
return 1;
}
return 0;
}
// Draw the chessboard// Parameters: pRenderer = Renderer, nSpacing = Checkerboard line spacing, pColor = Color (default black)void DrawBoard(SDL_Renderer *pRenderer, int nSpacing, SDL_Color *pColor)
{
SDL_Color c;
int r, x, y, z;
if(pColor == NULL)
= = = 0;
else
c = *pColor;
// Chessboard line SDL_SetRenderDrawColor(pRenderer, , , , SDL_ALPHA_OPAQUE);
for(int i = 1; i <= MAX_LINES; i++)
{
SDL_RenderDrawLine(pRenderer, nSpacing, i*nSpacing, MAX_LINES*nSpacing, i*nSpacing);
SDL_RenderDrawLine(pRenderer, i*nSpacing, nSpacing, i*nSpacing, MAX_LINES*nSpacing);
}
// Star position r = nSpacing*0.2; // Star radius x = nSpacing*4; // The fourth line y = nSpacing*(MAX_LINES+1)/2; // Center line z = nSpacing*(MAX_LINES-3); // The fourth line last FillCircle(pRenderer, x, x, r, &c);
FillCircle(pRenderer, y, x, r, &c);
FillCircle(pRenderer, z, x, r, &c);
FillCircle(pRenderer, x, y, r, &c);
FillCircle(pRenderer, y, y, r, &c);
FillCircle(pRenderer, z, y, r, &c);
FillCircle(pRenderer, x, z, r, &c);
FillCircle(pRenderer, y, z, r, &c);
FillCircle(pRenderer, z, z, r, &c);
}
// Draw chess pieces// Parameters: pRenderer = Renderer, nSpacing = Chessboard line spacing, pBlackTexture = Blackspot texture, pWhiteTexture = Whitespot texturevoid DrawPieces(SDL_Renderer *pRenderer, int nSpacing, SDL_Texture *pBlackTexture, SDL_Texture *pWhiteTexture)
{
int r = 0.4*nSpacing; // radius of chess piece SDL_Rect rt = {0, 0, 2*r, 2*r};
if(g_nHands <= 0)
return;
for(int i=0; i<MAX_LINES; i++)
{
for(int j=0; j<MAX_LINES; j++)
{
= (i+1)*nSpacing - r;
= (j+1)*nSpacing - r;
if(g_iBoard[i][j] == BLACK)
SDL_RenderCopyEx(pRenderer, pBlackTexture, NULL, &rt, 0, NULL, SDL_FLIP_NONE);
else if(g_iBoard[i][j] == WHITE)
SDL_RenderCopyEx(pRenderer, pWhiteTexture, NULL, &rt, 0, NULL, SDL_FLIP_NONE);
}
}
}
// Prompt text// Parameters: szString = text content, pFont = font, pColor = text color (default black)void PrintString(SDL_Renderer *pRenderer, int nSpacing, char *szString, TTF_Font *pFont, SDL_Color *pColor)
{
SDL_Texture *pTextTexture;
SDL_Rect rt;
= nSpacing;
= nSpacing*(MAX_LINES+1);
= nSpacing*strlen(szString)/4; // This 4 is related to the font size = nSpacing;
if((pTextTexture = GetStringTexture(pRenderer, pFont, szString, pColor)) != NULL)
{
SDL_RenderCopyEx(pRenderer, pTextTexture, NULL, &rt, 0, NULL, SDL_FLIP_NONE);
SDL_DestroyTexture(pTextTexture);
}
}
// Get the image file texture// Parameters: szFile = picture file name, bTransparent = whether to process transparently, pBackGroundColor = background color (default white)// Return value: texture pointerSDL_Texture *GetImageTexture(SDL_Renderer *pRenderer, char *szFile, _Bool bTransparent, SDL_Color *pBackGroundColor)
{
SDL_Texture *pTexture;
SDL_Surface *pSurface;
int r, g, b;
if((pSurface = IMG_Load(szFile)) == NULL)
return NULL;
if(bTransparent)
{
if(pBackGroundColor == NULL)
{
r = g = b = 255;
}
else
{
r = pBackGroundColor->r;
g = pBackGroundColor->g;
b = pBackGroundColor->b;
}
SDL_SetColorKey(pSurface, 1, SDL_MapRGB(pSurface->format, r, g, b));
}
pTexture = SDL_CreateTextureFromSurface(pRenderer, pSurface);
SDL_FreeSurface(pSurface);
return pTexture;
}
// Get string texture// Parameters: szString = string content, pFont = font, pColor = text color (default black)// Return value: texture pointerSDL_Texture *GetStringTexture(SDL_Renderer *pRenderer, TTF_Font *pFont, char *szString, SDL_Color *pColor)
{
SDL_Texture *pTexture;
SDL_Surface *pSurface;
SDL_Color c;
if(pColor == NULL)
= = = 0;
else
c = *pColor;
if((pSurface = TTF_RenderUTF8_Blended(pFont, szString, c)) == NULL)
return NULL;
pTexture = SDL_CreateTextureFromSurface(pRenderer, pSurface);
SDL_FreeSurface(pSurface);
return pTexture;
}
// Draw circles (SDL2 does not have a function to draw circles, just use a rectangular box instead)// Parameters: pRenderer = Renderer, (x, y) = Center coordinate, r = Radius, pCOlor = Fill colorvoid FillCircle(SDL_Renderer *pRenderer, int x, int y, int r, SDL_Color *pColor)
{
SDL_Rect rt = {x-r, y-r, 2*r, 2*r};
SDL_SetRenderDrawColor(pRenderer, pColor->r, pColor->g, pColor->b, SDL_ALPHA_OPAQUE);
SDL_RenderFillRect(pRenderer, &rt);
}
//
// Goziqi: Data processing module
#include ""
// Public variablesint g_nHands; // Total lotint g_nLastCrossing; // 100*x+y, (x, y) is the coordinates of the last handenum en_COLOR g_iWho; // Which side is the turn to make a move: 0 Cannot make a move, 1 Black side, 2 White sideint g_iBoard[MAX_LINES][MAX_LINES]; // Checkerboard intersection data: 0 No child, 1 blackspot, 2 whitespot
// Determine whether the last move forms a five-piece bead// Return value: 1 = Five-subunit beads formed, 0 = Five-subunit beads not formed_Bool Five_isFive(void)
{
int i, j, nCount, x, y;
if(g_nLastCrossing < 0)
return 0;
x = g_nLastCrossing/100;
y = g_nLastCrossing%100;
// Horizontal line count nCount = 1;
i = x - 1; // Left while(i>=0 && g_iBoard[x][y]==g_iBoard[i][y])
{
nCount++;
i--;
}
i = x + 1; // Right while(i<MAX_LINES && g_iBoard[x][y]==g_iBoard[i][y])
{
nCount++;
i++;
}
if(nCount >= 5)
return 1;
// Vertical line count nCount = 1;
j = y - 1; // superior while(j>=0 && g_iBoard[x][y]==g_iBoard[x][j])
{
nCount++;
j--;
}
j = y + 1; // Down while(j<MAX_LINES && g_iBoard[x][y]==g_iBoard[x][j])
{
nCount++;
j++;
}
if(nCount >= 5)
return 1;
// Left slash count nCount = 1;
i = x - 1; // Top left j = y - 1;
while(i>=0 && j>=0 && g_iBoard[x][y]==g_iBoard[i][j])
{
nCount++;
i--;
j--;
}
i = x + 1; // Lower right j = y + 1;
while(i<MAX_LINES && j<MAX_LINES && g_iBoard[x][y]==g_iBoard[i][j])
{
nCount++;
i++;
j++;
}
if(nCount >= 5)
return 1;
// Right slash count nCount = 1;
i = x + 1; // Top right j = y - 1;
while(i<MAX_LINES && j>=0 && g_iBoard[x][y]==g_iBoard[i][j])
{
nCount++;
i++;
j--;
}
i = x - 1; // Lower left j = y + 1;
while(i>=0 && j<MAX_LINES && g_iBoard[x][y]==g_iBoard[i][j])
{
nCount++;
i--;
j++;
}
if(nCount >= 5)
return 1;
return 0;
}
// Reset the game datavoid Five_ResetData(void)
{
for(int i=0; i<MAX_LINES; i++)
for(int j=0; j<MAX_LINES; j++)
g_iBoard[i][j] = NONE;
g_nHands = 0;
g_nLastCrossing = -1;
g_iWho = BLACK;
}
// Record a write-in data// Parameters: x, y = chess piece coordinates, c = chess piece colorvoid Five_AddPiece(int x, int y, enum en_COLOR c)
{
g_iBoard[x][y] = c;
g_nHands++;
g_nLastCrossing = 100*x + y;
g_iWho = (g_iWho == BLACK ? WHITE : BLACK);
}
//
// Goziqi: external interface of data processing module
#ifndef _FIVE_DATA_H
#define _FIVE_DATA_H
enum en_COLOR // Chess piece color{
NONE = 0, // No children BLACK, // Heizi WHITE // Bai Zi};
// Chess game#define MAX_LINES 15 // Number of chessboard linesextern int g_nHands; // Total lotsextern int g_nLastCrossing; // 100*x+y, (x, y) is the coordinates of the last handextern enum en_COLOR g_iWho; // Which side is the turn to make a move: 0 Cannot make a move, 1 Black side, 2 White sideextern int g_iBoard[MAX_LINES][MAX_LINES]; // Checkerboard intersection data: 0 No child, 1 blackspot, 2 whitespot
// Determine whether the last move forms a five-piece bead// Return value: 1 = Five-subunit beads formed, 0 = Five-subunit beads not formedextern _Bool Five_isFive(void);
// Reset the game dataextern void Five_ResetData(void);
// Record a write-in data// Parameters: x, y = chess piece coordinates, c = chess piece colorextern void Five_AddPiece(int x, int y, enum en_COLOR c);
#endifThe above is all the content of this article. I hope it will be helpful to everyone's study and I hope everyone will support me more.