tests/spec/arb_multisample/pushpop.c

   1 /*
   2  * Copyright © 2011 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include "piglit-util-gl.h"
  25
  26 /**
  27  * @file pushpop.c
  28  *
  29  * From the GL_ARB_multisample spec:
  30  *
  31  *     "An additional group of state variables, MULTISAMPLE_BIT_ARB,
  32  *      is defined by this extension.  When PushAttrib is called with
  33  *      bit MULTISAMPLE_BIT_ARB set, the multisample group of state
  34  *      variables is pushed onto the attribute stack.  When PopAttrib
  35  *      is called, these state variables are restored to their
  36  *      previous values if they were pushed.  Some multisample state
  37  *      is included in the ENABLE_BIT group as well. In order to avoid
  38  *      incompatibility with GL implementations that do not support
  39  *      SGIS_multisample, ALL_ATTRIB_BITS does not include
  40  *      MULTISAMPLE_BIT_ARB."
  41  *
  42  *      Get Value                       Get Command    Type    Initial Value    Attribute
  43  *      ---------                       -----------    ----    -------------    ---------
  44  *      MULTISAMPLE_ARB                 IsEnabled      B       TRUE             multisample/enable
  45  *      SAMPLE_ALPHA_TO_COVERAGE_ARB    IsEnabled      B       FALSE            multisample/enable
  46  *      SAMPLE_ALPHA_TO_ONE_ARB         IsEnabled      B       FALSE            multisample/enable
  47  *      SAMPLE_COVERAGE_ARB             IsEnabled      B       FALSE            multisample/enable
  48  *
  49  *      SAMPLE_COVERAGE_VALUE_ARB       GetFloatv      R+      1                multisample
  50  *      SAMPLE_COVERAGE_INVERT_ARB      GetBooleanv    B       FALSE            multisample
  51  *
  52  */
  53
  54 PIGLIT_GL_TEST_CONFIG_BEGIN
  55
  56         config.supports_gl_compat_version = 10;
  57
  58         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
  59
  60         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  61
  62 PIGLIT_GL_TEST_CONFIG_END
  63
  64 enum piglit_result
  65 piglit_display(void)
  66 {
  67         /* UNREACHED */
  68         return PIGLIT_FAIL;
  69 }
  70
  71 static bool
  72 test_bool(GLenum e, const char *name, bool val)
  73 {
  74         GLboolean ret = glIsEnabled(e);
  75
  76         if (ret != val) {
  77                 fprintf(stderr, "  %s %d doesn't match expected %d\n",
  78                         name, ret, val);
  79                 return false;
  80         } else {
  81                 return true;
  82         }
  83 }
  84
  85 static bool
  86 test_enable_bits(bool val)
  87 {
  88         bool pass = true;
  89
  90         pass = test_bool(GL_MULTISAMPLE, "multisample", val) && pass;
  91         pass = test_bool(GL_SAMPLE_ALPHA_TO_COVERAGE, "alpha to coverage", val) && pass;
  92         pass = test_bool(GL_SAMPLE_ALPHA_TO_ONE, "alpha to one", val) && pass;
  93         pass = test_bool(GL_SAMPLE_COVERAGE, "sample coverage", val) && pass;
  94
  95         return pass;
  96 }
  97
  98 static void
  99 set_enable_bits(bool val)
 100 {
 101         if (val) {
 102                 glEnable(GL_MULTISAMPLE);
 103                 glEnable(GL_SAMPLE_ALPHA_TO_COVERAGE);
 104                 glEnable(GL_SAMPLE_ALPHA_TO_ONE);
 105                 glEnable(GL_SAMPLE_COVERAGE);
 106         } else {
 107                 glDisable(GL_MULTISAMPLE);
 108                 glDisable(GL_SAMPLE_ALPHA_TO_COVERAGE);
 109                 glDisable(GL_SAMPLE_ALPHA_TO_ONE);
 110                 glDisable(GL_SAMPLE_COVERAGE);
 111         }
 112 }
 113
 114 static bool
 115 test_coverage(bool mode)
 116 {
 117         bool pass = true;
 118         GLboolean invert;
 119
 120         float expected = 0.25 + (mode ? 0.5 : 0.0), coverage;
 121
 122         glGetFloatv(GL_SAMPLE_COVERAGE_VALUE, &coverage);
 123         if (coverage != expected) {
 124                 fprintf(stderr,
 125                         "  coverage value %f doesn't match expected %f\n",
 126                         expected, coverage);
 127                 pass = false;
 128         }
 129
 130         glGetBooleanv(GL_SAMPLE_COVERAGE_INVERT, &invert);
 131         if (invert != mode) {
 132                 fprintf(stderr,
 133                         "  coverage invert value %d doesn't match expected %d\n",
 134                         invert, mode);
 135                 pass = false;
 136         }
 137
 138         return pass;
 139 }
 140
 141 static bool
 142 test_state(bool enable_on, bool coverage_mode)
 143 {
 144         return test_enable_bits(enable_on) & test_coverage(coverage_mode);
 145 }
 146
 147 static void
 148 set_coverage(bool mode)
 149 {
 150         float coverage_val = 0.25 + (mode ? 0.5 : 0.0);
 151
 152         glSampleCoverageARB(coverage_val, mode);
 153 }
 154
 155 static bool
 156 pushpop(GLuint bit, const char *test,
 157         bool affects_enabled, bool affects_other)
 158 {
 159         printf("%s test:\n", test);
 160
 161         set_enable_bits(true);
 162         set_coverage(true);
 163
 164         if (bit != 0) {
 165                 glPushAttrib(bit);
 166                 set_enable_bits(false);
 167                 set_coverage(false);
 168                 glPopAttrib();
 169         }
 170
 171         if (!test_state(affects_enabled, affects_other))
 172                 return false;
 173
 174         /* Now, test the bits the other direction.  Caught a bug in my
 175          * first pass of fixing Mesa.
 176          */
 177         set_enable_bits(false);
 178         set_coverage(false);
 179
 180         if (bit != 0) {
 181                 glPushAttrib(bit);
 182                 set_enable_bits(true);
 183                 set_coverage(true);
 184                 glPopAttrib();
 185         }
 186
 187         return test_state(!affects_enabled, !affects_other);
 188 }
 189
 190 void
 191 piglit_init(int argc, char **argv)
 192 {
 193         bool pass = true;
 194
 195         piglit_require_extension("GL_ARB_multisample");
 196
 197         pass = pushpop(0, "sanity test", true, true);
 198         if (!pass)
 199                 piglit_report_result(PIGLIT_FAIL);
 200         pass = pushpop(GL_MULTISAMPLE_BIT, "GL_MULTISAMPLE_BIT",
 201                        true, true) && pass;
 202         pass = pushpop(GL_ENABLE_BIT, "GL_ENABLE_BIT",
 203                        true, false) && pass;
 204         pass = pushpop(GL_ALL_ATTRIB_BITS, "GL_ALL_ATTRIB_BITS",
 205                        true, false) && pass;
 206
 207         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 208 }