tests/general/roundmode-getintegerv.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 /**
  25  * @file roundmode-getintegerv.c
  26  *
  27  * Tests that the floating point rounding mode doesn't impact
  28  * glGetIntegerv's rounding behavior.
  29  *
  30  * From the GL 2.1 specification, page 248 (page 262 of the PDF):
  31  *
  32  *     "If a Get command is issued that returns value types different
  33  *      from the type of the value being obtained, a type conversion
  34  *      is performed...  If GetIntegerv (or any of the Get commands
  35  *      below) is called, a boolean value is interpreted as either 1
  36  *      or 0, and a floating-point value is rounded to the nearest
  37  *      integer, unless the value is an RGBA color component, a
  38  *      DepthRange value, a depth buffer clear value, or a normal
  39  *      coordinate."
  40  */
  41
  42 #include "piglit-util-gl.h"
  43
  44 #include <fenv.h>
  45
  46 PIGLIT_GL_TEST_CONFIG_BEGIN
  47
  48         config.supports_gl_compat_version = 10;
  49
  50         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE;
  51
  52 PIGLIT_GL_TEST_CONFIG_END
  53
  54 enum piglit_result
  55 piglit_display(void)
  56 {
  57         /* UNREACHED */
  58         return PIGLIT_FAIL;
  59 }
  60
  61 static bool
  62 test(float val, int expect)
  63 {
  64         GLint out;
  65
  66         glFogf(GL_FOG_START, val);
  67         glGetIntegerv(GL_FOG_START, &out);
  68
  69         if (out != expect) {
  70                 printf("Set fog start to %.1f, expected %d, got %d\n",
  71                        val, expect, out);
  72                 return false;
  73         } else {
  74                 printf("Set fog start to %.1f, got %d\n", val, out);
  75                 return true;
  76         }
  77 }
  78
  79 void
  80 piglit_init(int argc, char **argv)
  81 {
  82         bool pass = true;
  83
  84 #ifdef FE_UPWARD
  85         if (fesetround(FE_UPWARD) != 0) {
  86                 printf("Setting rounding mode failed\n");
  87                 piglit_report_result(PIGLIT_SKIP);
  88         }
  89 #else
  90         printf("Cannot set rounding mode\n");
  91         piglit_report_result(PIGLIT_SKIP);
  92 #endif
  93
  94         pass = test(2.2, 2) && pass;
  95         pass = test(2.8, 3) && pass;
  96         pass = test(-2.2, -2) && pass;
  97         pass = test(-2.8, -3) && pass;
  98
  99         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 100 }
 101