cogl/cogl-depth-state.c

   1 /*
   2  * Cogl
   3  *
   4  * An object oriented GL/GLES Abstraction/Utility Layer
   5  *
   6  * Copyright (C) 2011 Intel Corporation.
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library. If not, see
  20  * <http://www.gnu.org/licenses/>.
  21  *
  22  * Authors:
  23  *   Robert Bragg <robert@linux.intel.com>
  24  */
  25
  26 #ifdef HAVE_CONFIG_H
  27 #include "config.h"
  28 #endif
  29
  30 #include "cogl-util.h"
  31 #include "cogl-depth-state-private.h"
  32 #include "cogl-depth-state.h"
  33
  34 void
  35 cogl_depth_state_init (CoglDepthState *state)
  36 {
  37   state->magic = COGL_DEPTH_STATE_MAGIC;
  38
  39   /* The same as the GL defaults */
  40   state->test_enabled = FALSE;
  41   state->write_enabled = TRUE;
  42   state->test_function = COGL_DEPTH_TEST_FUNCTION_LESS;
  43   state->range_near = 0;
  44   state->range_far = 1;
  45 }
  46
  47 void
  48 cogl_depth_state_set_test_enabled (CoglDepthState *state,
  49                                    gboolean enabled)
  50 {
  51   _COGL_RETURN_IF_FAIL (state->magic == COGL_DEPTH_STATE_MAGIC);
  52   state->test_enabled = enabled;
  53 }
  54
  55 gboolean
  56 cogl_depth_state_get_test_enabled (CoglDepthState *state)
  57 {
  58   _COGL_RETURN_VAL_IF_FAIL (state->magic == COGL_DEPTH_STATE_MAGIC, FALSE);
  59   return state->test_enabled;
  60 }
  61
  62 void
  63 cogl_depth_state_set_write_enabled (CoglDepthState *state,
  64                                     gboolean enabled)
  65 {
  66   _COGL_RETURN_IF_FAIL (state->magic == COGL_DEPTH_STATE_MAGIC);
  67   state->write_enabled = enabled;
  68 }
  69
  70 gboolean
  71 cogl_depth_state_get_write_enabled (CoglDepthState *state)
  72 {
  73   _COGL_RETURN_VAL_IF_FAIL (state->magic == COGL_DEPTH_STATE_MAGIC, FALSE);
  74   return state->write_enabled;
  75 }
  76
  77 void
  78 cogl_depth_state_set_test_function (CoglDepthState *state,
  79                                     CoglDepthTestFunction function)
  80 {
  81   _COGL_RETURN_IF_FAIL (state->magic == COGL_DEPTH_STATE_MAGIC);
  82   state->test_function = function;
  83 }
  84
  85 CoglDepthTestFunction
  86 cogl_depth_state_get_test_function (CoglDepthState *state)
  87 {
  88   _COGL_RETURN_VAL_IF_FAIL (state->magic == COGL_DEPTH_STATE_MAGIC, FALSE);
  89   return state->test_function;
  90 }
  91
  92 void
  93 cogl_depth_state_set_range (CoglDepthState *state,
  94                             float near,
  95                             float far)
  96 {
  97   _COGL_RETURN_IF_FAIL (state->magic == COGL_DEPTH_STATE_MAGIC);
  98   state->range_near = near;
  99   state->range_far = far;
 100 }
 101
 102 void
 103 cogl_depth_state_get_range (CoglDepthState *state,
 104                             float *near_out,
 105                             float *far_out)
 106 {
 107   _COGL_RETURN_IF_FAIL (state->magic == COGL_DEPTH_STATE_MAGIC);
 108   *near_out = state->range_near;
 109   *far_out = state->range_far;
 110 }