1 #include <windows.h> // include important windows stuff
2
3 #include "SDL.h"
4
5 #include <cstdio>
6
7 #pragma comment(lib,"SDL2.lib")
8 #pragma comment(lib,"SDL2main.lib")
9
10 #pragma warning(disable:4244) //全部关掉
11
12 #define SCREEN_WIDTH 640 //窗口尺寸
13 #define SCREEN_HEIGHT 480
14
15
16 SDL_Window* gWindow = nullptr;//渲染的窗口
17
18
19 SDL_Surface* gScreenSurface = nullptr;//窗口包含的表面
20
21 SDL_Renderer* gRenderer = nullptr;
22
23
24 SDL_Texture* gTexture = nullptr;//加载和显示到屏幕的图像
25
26
27 UINT pixels[SCREEN_WIDTH * SCREEN_HEIGHT];
28
29
30 bool init();//启动sdl，创建窗口
31
32 void close();
33
34 int Game_Main();
35
36
37 void setPixels(int x, int y, UINT color);
38
39 int main(int argc, char *argv[])
40 {
41 printf("Start Game!\n");
42
43 if (!init())
44 {
45 printf("Failed to initialize!\n");
46 }
47 else
48 {
49 bool quit = false;
50
51 SDL_Event e;
52
53 while (!quit)
54 {
55 while (SDL_PollEvent(&e) != 0)
56 {
57 if (e.type == SDL_QUIT)
58 {
59 quit = true;
60 }
61 }
63
64 Game_Main();
66 }
67 }
68
69 close();
70
71 return 0;
72 }
73
74 bool init()
75 {
76 bool success = true;
77
78 if (SDL_Init(SDL_INIT_VIDEO) < 0)
79 {
80 printf("SDL could not initialize! SDL_Error: %s\n", SDL_GetError());
81 success = false;
82 }
83 else
84 {
85 gWindow = SDL_CreateWindow("sdl test", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
86 if (gWindow == nullptr)
87 {
88 printf("Window could not be created! SDL_Error: %s\n", SDL_GetError());
89 success = false;
90 }
91 else
92 {
93 gRenderer = SDL_CreateRenderer(gWindow, -1, SDL_RENDERER_ACCELERATED);
94 if (gRenderer == nullptr)
95 {
96 printf("Renderer could not be created! SDL_Error: %s\n", SDL_GetError());
97 success = false;
98 }
99 else
100 {
101 gScreenSurface = SDL_GetWindowSurface(gWindow);
102
103 gTexture = SDL_CreateTexture(gRenderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STATIC, SCREEN_WIDTH, SCREEN_HEIGHT);
105 }
106 }
107 }
108
109 return success;
110 }
111
112
113 void close()
114 {
115 SDL_DestroyTexture(gTexture);
116 gTexture = nullptr;
117
118 SDL_DestroyRenderer(gRenderer);
119 SDL_DestroyWindow(gWindow);
120 gWindow = nullptr;
121 gRenderer = nullptr;
122
123 SDL_Quit();
124 }
125
126 void setPixels(int x, int y, UINT color)
127 {
128 int index = (int)(SCREEN_WIDTH * y + x);
129
130 pixels[index] = color;
131 }
132
133
134 //游戏循环
135 int Game_Main()
136 {
137 //清屏
138 SDL_SetRenderDrawColor(gRenderer, 0xFF, 0xFF, 0xFF, 0xFF);
139 SDL_RenderClear(gRenderer);
140
141 //清空像素
142 memset(pixels, 0xFF0000, SCREEN_WIDTH * SCREEN_HEIGHT * sizeof(Uint32));
143
144 //设置像素点
145 setPixels(10, 10, 0xFF0000);
146 setPixels(20, 20, 0x00FF00);
147
148 SDL_UpdateTexture(gTexture, NULL, pixels, 640 * sizeof(Uint32));
149
150 //渲染贴图到屏幕
151 SDL_RenderCopy(gRenderer, gTexture, nullptr, nullptr);
152
153 //显示
154 SDL_RenderPresent(gRenderer);
155
156 return 1;
157 }
