static void
_del_gl(Evas_Object *obj)
{
GLData *gld = evas_object_data_get(obj, "gld");
if (!gld)
{
printf("Unable to get GLData. \n");
return;
}
Evas_GL_API *gl = gld->glapi;
gl->glDeleteShader(gld->vtx_shader);
gl->glDeleteShader(gld->fgmt_shader);
gl->glDeleteProgram(gld->program);
gl->glDeleteBuffers(1, &gld->gear1->vbo);
gl->glDeleteBuffers(1, &gld->gear2->vbo);
gl->glDeleteBuffers(1, &gld->gear3->vbo);
free_gear(gld->gear1);
free_gear(gld->gear2);
free_gear(gld->gear3);
evas_object_data_del((Evas_Object*)obj, "..gld");
free(gld);
}
// Initialize the shader and program object
static int
init_shaders(GLData *gld)
{
Evas_GL_API *gl = gld->glapi;
GLbyte vShaderStr[] =
"attribute vec4 vPosition; \n"
"void main() \n"
"{ \n"
" gl_Position = vPosition; \n"
"} \n";
GLbyte fShaderStr[] =
"#ifdef GL_ES \n"
"precision mediump float; \n"
"#endif \n"
"void main() \n"
"{ \n"
" gl_FragColor = vec4 ( 1.0, 0.0, 0.0, 1.0 );\n"
"} \n";
GLint linked;
// Load the vertex/fragment shaders
gld->vtx_shader = load_shader(gld, GL_VERTEX_SHADER, (const char*)vShaderStr);
gld->fgmt_shader = load_shader(gld, GL_FRAGMENT_SHADER, (const char*)fShaderStr);
// Create the program object
gld->program = gl->glCreateProgram( );
if (0 == gld->program)
return 0;
gl->glAttachShader(gld->program, gld->vtx_shader);
gl->glAttachShader(gld->program, gld->fgmt_shader);
gl->glBindAttribLocation(gld->program, 0, "vPosition");
gl->glLinkProgram(gld->program);
gl->glGetProgramiv(gld->program, GL_LINK_STATUS, &linked);
if (!linked)
{
GLint info_len = 0;
gl->glGetProgramiv(gld->program, GL_INFO_LOG_LENGTH, &info_len);
if (1 < info_len)
{
char* info_log = malloc(sizeof(char) * info_len);
gl->glGetProgramInfoLog(gld->program, info_len, NULL, info_log);
_printf("Error linking program:\n%s\n", info_log);
free(info_log);
g_assert(FALSE);
}
gl->glDeleteProgram(gld->program);
return 0;
}
return 1;
}
