掌機 - Miyoo Mini Plus - C/C++ - SDL v2.0 - OpenGL ES 2.0 - Get Version

main.c

#include <stdio.h>
#include <stdlib.h>
#include <SDL2/SDL.h>
#include <GLES2/gl2.h>
 
int main(int argc, char **argv)
{
    SDL_Window *window = NULL;
    SDL_GLContext context = {0};
    const GLubyte *version = NULL;
 
    SDL_Init(SDL_INIT_VIDEO);
    SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
 
    window = SDL_CreateWindow("main", 0, 0, 320, 240, SDL_WINDOW_OPENGL);
    context = SDL_GL_CreateContext(window);
    version = glGetString(GL_VERSION);
    printf("Version:%s\n", version);
    SDL_GL_DeleteContext(context);
    return 0;
}

編譯、執行

$ /opt/mini/bin/arm-linux-gnueabihf-gcc \
    -I/opt/mini/arm-buildroot-linux-gnueabihf/sysroot/usr/include/SDL2 \
    -lSDL2 -lSDL2_gfx -lSDL2_image -lSDL2_ttf -lSDL2_mixer -lGLESv2 \
    main.c -o main

# kill -STOP `pidof MainUI`
# LD_LIBRARY_PATH=.:/config/lib:/customer/lib ./main
    Version:OpenGL ES 3.0 SwiftShader 4.1.0.7
# kill -CONT `pidof MainUI`