Graphic_Util::Graphic_Util() {
std::cout << "GRAPHIC UTIL" << std::endl;
//Init SDL Opengl COntext at startup
init_sdl();
build_shader();
}
int LogoRenderer::build_program(GenericShaderContext *gs) {
GLuint v_shader, f_shader;
if (!((v_shader = build_shader(v_shader_source, GL_VERTEX_SHADER)) &&
(f_shader = build_shader(f_shader_source, GL_FRAGMENT_SHADER)))) {
//av_log(NULL, AV_LOG_ERROR, "build_shader error\n");
return -1;
}
gs->program = glCreateProgram();
glAttachShader(gs->program, v_shader);
glAttachShader(gs->program, f_shader);
glLinkProgram(gs->program);
GLint status;
glGetProgramiv(gs->program, GL_LINK_STATUS, &status);
return status == GL_TRUE ? 0 : -1;
}
int GLWidget::build_program(GenericShaderContext *gs, const QString& fragSource)
{
GLuint v_shader, f_shader;
v_shader = build_shader(v_shader_source, GL_VERTEX_SHADER);
//f_shader = build_shader(f_shader_source, GL_FRAGMENT_SHADER);
f_shader = build_shader(fragSource.toLocal8Bit().constData(), GL_FRAGMENT_SHADER);
if (!(v_shader && f_shader )) {
qDebug()<<"GLWidget::build_shader error";
return -1;
}
gs->program = glCreateProgram();
qDebug()<<"GLWidget::build_program gs->program: "<<gs->program;
glAttachShader(gs->program, v_shader);
glAttachShader(gs->program, f_shader);
glLinkProgram(gs->program);
GLint status;
glGetProgramiv(gs->program, GL_LINK_STATUS, &status);
return status == GL_TRUE ? 0 : -1;
}
// ---------------------------------------------------------- build_program ---
GLuint build_program( const char * vertex_source,
const char * fragment_source )
{
GLuint vertex_shader = build_shader( vertex_source, GL_VERTEX_SHADER);
GLuint fragment_shader = build_shader( fragment_source, GL_FRAGMENT_SHADER);
GLuint handle = glCreateProgram( );
glAttachShader( handle, vertex_shader);
glAttachShader( handle, fragment_shader);
glLinkProgram( handle);
GLint link_status;
glGetProgramiv( handle, GL_LINK_STATUS, &link_status );
if (link_status == GL_FALSE)
{
GLchar messages[256];
glGetProgramInfoLog( handle, sizeof(messages), 0, &messages[0] );
fprintf( stderr, "%s\n", messages );
exit(1);
}
return handle;
}