移植SDL2_ttf到ARM

最新推荐文章于 2025-06-30 09:04:57 发布

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本文介绍如何下载并使用最新源码进行SDL2及Freetype的跨平台编译配置，并提供了一个使用SDL2和Freetype显示中文字体的示例程序。

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下载最新源码，最新的才支持SDL2

然后执行命令，，编译通过，，，，前期准备是要成功安装freetype 和sdl2

./configure --prefix=/gzz/cross_compile/SDL --host=arm-linux --with-sdl-prefix=/gzz/cross_compile/SDL --with-freetype-prefix=/gzz/cross_compile/SDL --with-gnu-ld CPPFLAGS="-I/gzz/cross_compile/SDL/include" LDFLAGS="-L/gzz/cross_compile/SDL/lib"

make ; make install;

测试程序：

#include "SDL.h"
#include<stdio.h>
#include "SDL_ttf.h"
SDL_Window* Main_Window;
SDL_Renderer* Main_Renderer;
int main(int argc,char *argv[])

{

       char *file;
       int w,h;
       Uint8 bpp;
       Uint32 flags;
       TTF_Font *font;    
       SDL_Color red = {255,0,0};
       SDL_Color green = {0,255,0};
       SDL_Surface *message1,*message2;
       SDL_Texture *Tx_message1,*Tx_message2;
       SDL_Rect SrcR;
       SDL_Rect DestR1,DestR2;
    
     DestR1.x = 100;
     DestR1.y =  0;
     DestR1.h = 50;
     DestR1.w =  50;
     DestR2.x = 100;
     DestR2.y =  50;
     DestR2.h = 150;
     DestR2.w =  150;
       w = 480;
       h = 272;
       bpp = 0; 
       flags = SDL_SWSURFACE;
       if(SDL_Init(SDL_INIT_VIDEO) < 0){
             fprintf(stderr,"Couldn't initialize SDL:%s\n",SDL_GetError());
            return (1);
       }
   Main_Window= SDL_CreateWindow("ttf test",0,0, w, h, 0);
   Main_Renderer = SDL_CreateRenderer(Main_Window, -1, SDL_RENDERER_ACCELERATED);
   if(TTF_Init() == -1)
    return -1;
    font = TTF_OpenFont("STZHONGS.TTF",16);
   if(!font){
   printf("TTF_OpenFont:Open simsun.ttf %s\n",TTF_GetError());
   return -1;
   }
   message1 = TTF_RenderText_Solid(font, "ttf test", red);
   message2 = TTF_RenderUTF8_Solid(font, "字体显示", green);
   Tx_message1 = SDL_CreateTextureFromSurface(Main_Renderer, message1);
   SDL_FreeSurface(message1);  // we got the texture now -> free surface
   Tx_message2 = SDL_CreateTextureFromSurface(Main_Renderer, message2);
   SDL_FreeSurface(message2); 
while(1){
      if(message1||message2){
    SDL_RenderCopy(Main_Renderer, Tx_message1, NULL, &DestR1);
      /* render the current animation step of our shape */
    SDL_RenderCopy(Main_Renderer, Tx_message2, NULL, &DestR2);  
   }
SDL_RenderPresent(Main_Renderer);
}
TTF_CloseFont(font);
SDL_DestroyTexture(Tx_message1);
SDL_DestroyTexture(Tx_message2);
SDL_DestroyRenderer(Main_Renderer);
SDL_DestroyWindow(Main_Window);
SDL_Quit();
  return 0;
}