tests/spec/arb_uniform_buffer_object/getintegeri_v.c

   1 /*
   2  * Copyright © 2012 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
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 /** @file getintegeri_v.c
  25  *
  26  * From the GL_ARB_uniform_buffer_object spec:
  27  *
  28  *     "To query the starting offset or size of the range of each
  29  *      buffer object binding used for uniform buffers, call
  30  *      GetIntegeri_v with <param> set to UNIFORM_BUFFER_START or
  31  *      UNIFORM_BUFFER_SIZE respectively. <index> must be in the range
  32  *      zero to the value of MAX_UNIFORM_BUFFER_BINDINGS - 1. If the
  33  *      parameter (starting offset or size) was not specified when the
  34  *      buffer object was bound, zero is returned. If no buffer object
  35  *      is bound to <index>, -1 is returned."
  36  */
  37
  38 #include "piglit-util-gl.h"
  39
  40 PIGLIT_GL_TEST_CONFIG_BEGIN
  41
  42         config.supports_gl_compat_version = 10;
  43         config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
  44         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  45
  46 PIGLIT_GL_TEST_CONFIG_END
  47
  48 static bool pass = true;
  49
  50 static void
  51 test_index(int line, GLenum e, int index, int expected)
  52 {
  53         GLint val;
  54
  55         glGetIntegeri_v(e, index, &val);
  56         if (val != expected) {
  57                 printf("%s:%d: %s[%d] was %d, expected %d\n",
  58                        __FILE__, line, piglit_get_gl_enum_name(e), index,
  59                        val, expected);
  60                 pass = false;
  61         }
  62 }
  63
  64 void
  65 test_range(int line, int index, int bo, int offset, int size)
  66 {
  67         test_index(line, GL_UNIFORM_BUFFER_BINDING, index, bo);
  68         test_index(line, GL_UNIFORM_BUFFER_START, index, offset);
  69         test_index(line, GL_UNIFORM_BUFFER_SIZE, index, size);
  70 }
  71
  72 void
  73 piglit_init(int argc, char **argv)
  74 {
  75         GLuint bo[2];
  76         int size = 1024;
  77         GLint max_bindings;
  78         GLint junk;
  79         GLint alignment;
  80
  81         piglit_require_extension("GL_ARB_uniform_buffer_object");
  82
  83         test_range(__LINE__, 0, 0, 0, 0);
  84
  85         glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, &alignment);
  86
  87         glGenBuffers(2, bo);
  88         glBindBuffer(GL_UNIFORM_BUFFER, bo[0]);
  89         glBufferData(GL_UNIFORM_BUFFER, size, NULL, GL_STATIC_READ);
  90         glBindBuffer(GL_UNIFORM_BUFFER, bo[1]);
  91         glBufferData(GL_UNIFORM_BUFFER, size, NULL, GL_STATIC_READ);
  92
  93         glBindBufferRange(GL_UNIFORM_BUFFER, 0, bo[0], 0, 1);
  94         glBindBufferRange(GL_UNIFORM_BUFFER, 1, bo[1], 2 * alignment, 3);
  95         test_range(__LINE__, 0, bo[0], 0, 1);
  96         test_range(__LINE__, 1, bo[1], 2 * alignment, 3);
  97
  98         /* There's a bit of a contradiction in the spec.  On the one
  99          * hand, "BindBufferBase is equivalent to calling
 100          * BindBufferRange with offset zero and size equal to the size
 101          * of buffer", but on the other hand, " If the parameter
 102          * (starting offset or size) was not specified when the buffer
 103          * object was bound, zero is returned".  This is clarified by
 104          * the GL 4.2 specification, which says that "BindBufferBase
 105          * binds the entire buffer, even when the size of the buffer
 106          * is changed after the binding is established.", so the zero
 107          * return for the size makes sense since it's effectively
 108          * computed at render time.
 109          */
 110         glBindBufferBase(GL_UNIFORM_BUFFER, 1, bo[1]);
 111         test_range(__LINE__, 1, bo[1], 0, 0);
 112
 113         /* Is binding a BO of 0 valid?  It's not clear to me from the
 114          * spec ("The error INVALID_OPERATION is generated by
 115          * BindBufferRange and BindBufferBase if <buffer> is not the
 116          * name of a valid buffer object.", and glIsBuffer returns
 117          * false for 0), but it seems obviously parallel to the rest
 118          * of the GL API, including glBindBuffer(), to allow it
 119          */
 120         glBindBufferBase(GL_UNIFORM_BUFFER, 0, 0);
 121         test_range(__LINE__, 0, 0, 0, 0);
 122
 123         /* Test the error condition. */
 124         if (!piglit_khr_no_error) {
 125                 glGetIntegerv(GL_MAX_UNIFORM_BUFFER_BINDINGS, &max_bindings);
 126                 glGetIntegeri_v(GL_UNIFORM_BUFFER_BINDING, max_bindings, &junk);
 127                 if (!piglit_check_gl_error(GL_INVALID_VALUE))
 128                         pass = false;
 129         }
 130
 131         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 132 }
 133
 134 enum piglit_result piglit_display(void)
 135 {
 136         /* UNREACHED */
 137         return PIGLIT_FAIL;
 138 }
 139