Function config_gamma

Descent3/config.cpp:555–649

}

static void config_gamma() {
  newuiTiledWindow gamma_wnd;
  newuiSheet *sheet;
  tSliderSettings slider_set;
  int16_t *gamma_slider;
  int16_t curpos;
  int res, gamma_bitmap = -1;
  float init_gamma;

  // Make gamma bitmap
  gamma_bitmap = bm_AllocBitmap(128, 128, 0);
  if (gamma_bitmap <= 0) {
    gamma_bitmap = 0;
  } else {
    uint16_t *dest_data = (uint16_t *)bm_data(gamma_bitmap, 0);
    int addval = 0;
    int i, t;

    // This loop makes the checkerboard
    for (i = 0; i < 128; i++) {
      addval = (i & 1) ? 1 : 0;

      for (t = 0; t < 128; t++) {
        if (((t + addval) % 2) == 0) {
          dest_data[i * 128 + t] = OPAQUE_FLAG | (1 << 10) | (1 << 5) | (1);
        } else {
          dest_data[i * 128 + t] = OPAQUE_FLAG;
        }
      }
    }
  }

  // create ui.
  gamma_wnd.Create(TXT_AUTO_GAMMA, 0, 0, GAMMA_MENU_W, GAMMA_MENU_H);
  gamma_wnd.SetData(&gamma_bitmap);
  gamma_wnd.SetOnDrawCB(gamma_callback);

  sheet = gamma_wnd.GetSheet();

  // ok, cancel buttons.
  sheet->NewGroup(NULL, 130, 224, NEWUI_ALIGN_HORIZ);
  sheet->AddButton(TXT_APPLY, IDV_GAMMAAPPLY);
  sheet->AddText(" ");
  sheet->AddButton(TXT_OK, UID_OK);
  sheet->AddButton(TXT_CANCEL, UID_CANCEL);

  sheet->NewGroup(NULL, 0, 145);
  sheet->AddText(TXT_GAMMAADJUSTA);
  sheet->AddText(TXT_GAMMAADJUSTB);

  // add slider!
  sheet->NewGroup(NULL, 0, 175);
  slider_set.min_val.f = 1.0f;
  slider_set.max_val.f = 3.0f;
  slider_set.type = SLIDER_UNITS_FLOAT;

  init_gamma = Render_preferred_state.gamma;
  curpos = CALC_SLIDER_POS_FLOAT(init_gamma, &slider_set, GAMMA_SLIDER_UNITS);