I am trying to draw a triangle on the window with openGL GLFW library. Here is my complete code
#include <GL/glew.h> #include <GLFW/glfw3.h> #include <iostream> using namespace std; static unsigned int compileShader ( unsigned int type, const string& source ){ unsigned int id = glCreateShader ( type ); const char* src = source.c_str(); glShaderSource ( id, 1, &src, nullptr ); glCompileShader ( id ); int result = 0; glGetShaderiv ( id, GL_COMPILE_STATUS, &result ); if ( result == GL_FALSE ){ int length = 0; glGetShaderiv ( id, GL_INFO_LOG_LENGTH, &length ); char* message = ( char* ) alloca ( length * sizeof ( char ) ); glGetShaderInfoLog ( id, length, &length, message ); cout << "Failed to compile " << ( type == GL_VERTEX_SHADER ? "vertex" : "fragment" ) << "shader" << endl; cout << message << endl; glDeleteShader ( id ); } return id; } static int createShader ( const string& vertexShader, const string& fragmentShader ){ unsigned int program = glCreateProgram(); unsigned int vs = compileShader ( GL_VERTEX_SHADER, vertexShader ); unsigned int fs = compileShader ( GL_FRAGMENT_SHADER, fragmentShader ); glAttachShader ( program, vs ); glAttachShader ( program, fs ); glLinkProgram ( program ); glValidateProgram ( program ); glDeleteShader ( vs ); glDeleteShader ( fs ); return program; } int main(void) { GLFWwindow* window; /* Initialize the library */ if (!glfwInit()) return -1; /* Create a windowed mode window and its OpenGL context */ window = glfwCreateWindow(640, 480, "Hello World", NULL, NULL); if (!window) { glfwTerminate(); return -1; } /* Make the window's context current */ glfwMakeContextCurrent(window); if ( glewInit() != GLEW_OK ) cout << "error" << endl; glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR,3); glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR,3); glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE); cout << glGetString ( GL_VERSION ) << endl; float positions [ 6 ] = { -0.5f, -0.5f, 0.0f, 0.5f, 0.5f, -0.5f }; unsigned int buffer; glGenBuffers ( 1, &buffer ); glBindBuffer ( GL_ARRAY_BUFFER, buffer ); glBufferData ( GL_ARRAY_BUFFER, 6 * sizeof ( float ),positions, GL_STATIC_DRAW ); glEnableVertexAttribArray ( 0 ); glVertexAttribPointer ( 0, 2, GL_FLOAT, GL_FALSE, sizeof ( float ) * 2, 0 ); string vertexShader = "#version 320 core\n" "\n" "layout ( location = 0 ) in vec4 position;" "\n" "void main(){\n" "gl_Position = position;\n" "}\n"; string fragmentShader = "#version 320 core\n" "\n" "layout ( location = 0 ) out vec4 color;" "\n" "void main(){\n" "color = vec4(1.0,0.0,0.0,1.0);\n" "}\n"; unsigned int shader = createShader(vertexShader, fragmentShader ); glUseProgram ( shader ); /* Loop until the user closes the window */ while (!glfwWindowShouldClose(window)) { /* Render here */ glClear(GL_COLOR_BUFFER_BIT); glDrawArrays ( GL_TRIANGLES, 0, 3 ); /* Swap front and back buffers */ glfwSwapBuffers(window); /* Poll for and process events */ glfwPollEvents(); } glfwTerminate(); return 0; } and here is the output what I am getting
3.0 Mesa 18.0.5 Failed to compile vertexshader 0:1(10): error: GLSL 3.20 is not supported. Supported versions are: 1.10, 1.20, 1.30, 1.00 ES, 3.00 ES, 3.10 ES, and 3.20 ES Failed to compile fragmentshader 0:1(10): error: GLSL 3.20 is not supported. Supported versions are: 1.10, 1.20, 1.30, 1.00 ES, 3.00 ES, 3.10 ES, and 3.20 ES I have been working on this for an entire day and could not find any solution. I am completely new to openGL programming and this is my first attempt. I am using ubuntu 18.04 Here is the output of sudo glxinfo | grep "OpenGL"
OpenGL vendor string: Intel Open Source Technology Center OpenGL renderer string: Mesa DRI Intel(R) HD Graphics 620 (Kaby Lake GT2) OpenGL core profile version string: 4.5 (Core Profile) Mesa 18.0.5 OpenGL core profile shading language version string: 4.50 OpenGL core profile context flags: (none) OpenGL core profile profile mask: core profile OpenGL core profile extensions: OpenGL version string: 3.0 Mesa 18.0.5 OpenGL shading language version string: 1.30 OpenGL context flags: (none) OpenGL extensions: OpenGL ES profile version string: OpenGL ES 3.2 Mesa 18.0.5 OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20 OpenGL ES profile extensions: It would be grate if anybody can help me out, Thanks