/*
* @brief
*/
static r_program_t *R_LoadProgram(const char *name, void(*Init)(void)) {
r_program_t *prog;
char log[MAX_STRING_CHARS];
uint32_t e;
int32_t i;
for (i = 0; i < MAX_PROGRAMS; i++) {
prog = &r_state.programs[i];
if (!prog->id)
break;
}
if (i == MAX_PROGRAMS) {
Com_Warn("MAX_PROGRAMS reached\n");
return NULL;
}
g_strlcpy(prog->name, name, sizeof(prog->name));
prog->id = qglCreateProgram();
prog->v = R_LoadShader(GL_VERTEX_SHADER, va("%s_vs.glsl", name));
prog->f = R_LoadShader(GL_FRAGMENT_SHADER, va("%s_fs.glsl", name));
if (prog->v)
qglAttachShader(prog->id, prog->v->id);
if (prog->f)
qglAttachShader(prog->id, prog->f->id);
qglLinkProgram(prog->id);
qglGetProgramiv(prog->id, GL_LINK_STATUS, &e);
if (!e) {
qglGetProgramInfoLog(prog->id, sizeof(log) - 1, NULL, log);
Com_Warn("%s: %s\n", prog->name, log);
R_ShutdownProgram(prog);
return NULL;
}
prog->Init = Init;
if (prog->Init) { // invoke initialization function
R_UseProgram(prog);
prog->Init();
R_UseProgram(NULL);
}
R_GetError(prog->name);
return prog;
}
void R_ShutdownPrograms (void)
{
if (!qglDeleteProgram)
return;
if (!r_programs->integer)
return;
for (int i = 0; i < MAX_PROGRAMS; i++) {
if (!r_state.programs[i].id)
continue;
R_ShutdownProgram(&r_state.programs[i]);
}
}
/*
* @brief
*/
void R_ShutdownPrograms(void) {
int32_t i;
if (!qglDeleteProgram)
return;
R_UseProgram(NULL);
for (i = 0; i < MAX_PROGRAMS; i++) {
if (!r_state.programs[i].id)
continue;
R_ShutdownProgram(&r_state.programs[i]);
}
}
r_program_t* R_LoadProgram (const char* name, programInitFunc_t init, programUseFunc_t use)
{
r_program_t* prog;
unsigned e;
int i;
/* shaders are deactivated */
if (!r_programs->integer)
return nullptr;
/* search existing one */
for (i = 0; i < MAX_PROGRAMS; i++) {
prog = &r_state.programs[i];
if (Q_streq(prog->name, name))
return prog;
}
/* search free slot */
for (i = 0; i < MAX_PROGRAMS; i++) {
prog = &r_state.programs[i];
if (!prog->id)
break;
}
if (i == MAX_PROGRAMS) {
Com_Printf("R_LoadProgram: MAX_PROGRAMS reached.\n");
return nullptr;
}
Q_strncpyz(prog->name, name, sizeof(prog->name));
prog->id = qglCreateProgram();
prog->v = R_LoadShader(GL_VERTEX_SHADER, va("%s_vs.glsl", name));
prog->f = R_LoadShader(GL_FRAGMENT_SHADER, va("%s_fs.glsl", name));
if (prog->v)
qglAttachShader(prog->id, prog->v->id);
if (prog->f)
qglAttachShader(prog->id, prog->f->id);
qglLinkProgram(prog->id);
qglGetProgramiv(prog->id, GL_LINK_STATUS, &e);
if (!e || !prog->v || !prog->f) {
char log[MAX_STRING_CHARS];
qglGetProgramInfoLog(prog->id, sizeof(log) - 1, nullptr, log);
Com_Printf("R_LoadProgram: %s: %s\n", prog->name, log);
R_ShutdownProgram(prog);
return nullptr;
}
prog->init = init;
if (prog->init) { /* invoke initialization function */
R_UseProgram(prog);
prog->init(prog);
R_UseProgram(nullptr);
}
prog->use = use;
Com_Printf("R_LoadProgram: '%s' loaded.\n", name);
return prog;
}
