source/renderer/backend/CompareOp.h

   1 /* Copyright (C) 2022 Wildfire Games.
   2  * This file is part of 0 A.D.
   3  *
   4  * 0 A.D. is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * 0 A.D. is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef INCLUDED_RENDERER_BACKEND_COMPAREOP
  19 #define INCLUDED_RENDERER_BACKEND_COMPAREOP
  20
  21 #include "graphics/Color.h"
  22
  23 class CStr;
  24
  25 namespace Renderer
  26 {
  27
  28 namespace Backend
  29 {
  30
  31 enum class CompareOp
  32 {
  33         // Never passes the comparison.
  34         NEVER,
  35         // Passes if the source value is less than the destination value.
  36         LESS,
  37         // Passes if the source depth value is equal to the destination value.
  38         EQUAL,
  39         // Passes if the source depth value is less than or equal to the destination value.
  40         LESS_OR_EQUAL,
  41         // Passes if the source depth value is greater than the destination value.
  42         GREATER,
  43         // Passes if the source depth value is not equal to the destination value.
  44         NOT_EQUAL,
  45         // Passes if the source depth value is greater than or equal to the destination value.
  46         GREATER_OR_EQUAL,
  47         // Always passes the comparison.
  48         ALWAYS
  49 };
  50
  51 CompareOp ParseCompareOp(const CStr& str);
  52
  53 } // namespace Backend
  54
  55 } // namespace Renderer
  56
  57 #endif // INCLUDED_RENDERER_BACKEND_COMPAREOP