SDL Arm Linux 开发指南 (sdl arm linux)
SDL是一种跨平台的多媒体库，可用于开发游戏、应用程序和图形用户界面。ARM处理器是嵌入式设备中最常用的处理器之一。在这篇文章中，我们将讨论如何在ARM Linux上使用SDL进行开发。
1. SDL安装
在ARM Linux上安装SDL，需要使用如下命令：
“`
$ sudo apt-get install libsdl2-dev
“`
2. 开发环境配置
为了能够在ARM Linux上进行SDL开发，你需要将开发环境进行适当的配置。你需要编写一个Makefile，编译你的代码，然后使用gcc来链接它们。在Makefile中，需要引用SDL库。以下是一个示例Makefile：
“`
CC = gcc
CFLAGS = -Wall -g
LDFLAGS = -lSDL2
all: app
app: app.o
$(CC) -o app app.o $(LDFLAGS)
app.o: app.c
$(CC) $(CFLAGS) -c app.c
clean:
rm -f app *.o
“`
3. 创建一个SDL窗口
在ARM Linux上，创建一个SDL窗口的方法与在其他平台上创建窗口的方法相同。以下是一个创建一个窗口的示例代码：
“`
#include
int mn()
{
SDL_Window* window = NULL;
SDL_Renderer* renderer = NULL;
int running = 1;
SDL_Init(SDL_INIT_VIDEO);
window = SDL_CreateWindow(“SDL Window”,
SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED,
640, 480, SDL_WINDOW_SHOWN);
renderer = SDL_CreateRenderer(window, -1, 0);
while (running)
{
SDL_Event event;
while (SDL_PollEvent(&event))
{
if (event.type == SDL_QUIT)
{
running = 0;
}
}
SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
SDL_RenderClear(renderer);
SDL_RenderPresent(renderer);
}
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}
“`
4. SDL游戏开发
使用SDL进行游戏开发在ARM Linux上是一件很有趣的事情。以下是一个简单的SDL游戏示例：
“`
#include
int mn()
{
SDL_Window* window;
SDL_Renderer* renderer;
SDL_Texture* texture;
SDL_Rect dstrect;
int running = 1;
int i;
SDL_Init(SDL_INIT_VIDEO);
window = SDL_CreateWindow(“SDL Game”,
SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED,
640, 480, SDL_WINDOW_SHOWN);
renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
texture = SDL_CreateTexture(renderer,
SDL_PIXELFORMAT_ARGB8888,
SDL_TEXTUREACCESS_STATIC,
640, 480);
Uint32 pixels[640 * 480];
for (i = 0; i
{
pixels[i] = SDL_MapRGB(SDL_GetWindowSurface(window)->format, 255, 0, 0);
}
SDL_UpdateTexture(texture, NULL, pixels, 640 * sizeof(Uint32));
dstrect.x = 0; dstrect.y = 0; dstrect.w = 640; dstrect.h = 480;
while (running)
{
SDL_Event event;
while (SDL_PollEvent(&event))
{
if (event.type == SDL_QUIT)
{
running = 0;
}
}
SDL_RenderCopy(renderer, texture, NULL, &dstrect);
SDL_RenderPresent(renderer);
}
SDL_DestroyTexture(texture);
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}
“`
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