tests/spec/gl-3.2/get-active-attrib-returns-all-inputs.c

   1 /**
   2  * Copyright © 2013 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  * Test that built-in vertex input variables are enumerated by GetActiveAttrib()
  26  *
  27  * This is not explicitly stated in any specs before 4.3 core but it seems to
  28  * be clarified in later specs
  29  *
  30  * From GL 4.3 core spec, section 11.1.1 (Vertex Attributes):
  31  * "For GetActiveAttrib, all active vertex shader input variables are
  32  *  enumerated, including the special built-in inputs gl_VertexID and
  33  *  gl_InstanceID."
  34  *
  35  * From GL 4.3 core spec, section F.5 (Change Log for Released Specifications):
  36  * "Specify in section 11.1.1 that special built-in inputs and outputs such as
  37  *  gl_VertexID should be enumerated in the PROGRAM_INPUT and PROGRAM_OUTPUT
  38  *  interfaces, as well as the legacy function GetActiveAttrib. Add spec
  39  *  language counting the built-ins gl_VertexID and gl_InstanceID against the
  40  *  active attribute limit (Bug 9201)."
  41  */
  42
  43 #include "piglit-util-gl.h"
  44
  45 PIGLIT_GL_TEST_CONFIG_BEGIN
  46
  47         config.supports_gl_compat_version = 31;
  48         config.supports_gl_core_version = 31;
  49
  50         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  51         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  52
  53 PIGLIT_GL_TEST_CONFIG_END
  54
  55 static const char *vstext =
  56         "#version 140\n"
  57         "in vec4 piglit_vertex;\n"
  58         "flat out int instID;\n"
  59         "flat out int vertID;\n"
  60         "void main() {\n"
  61         "       gl_Position = piglit_vertex;\n"
  62         "       instID = gl_InstanceID;\n"
  63         "       vertID = gl_VertexID;\n"
  64         "}\n";
  65
  66 static const char *fstext =
  67         "#version 140\n"
  68         "flat in int instID;\n"
  69         "flat in int vertID;\n"
  70         "out vec4 color;\n"
  71         "void main() {\n"
  72         "       color = vec4(instID + vertID);\n"
  73         "}\n";
  74
  75 static GLuint prog;
  76
  77 bool
  78 check_that_attrib_is_active(const char *attrib_name)
  79 {
  80         int i;
  81         int numAttribs = 0;
  82         GLsizei length;
  83         GLint size;
  84         GLenum type;
  85         GLchar name[100];
  86
  87         glGetProgramiv(prog, GL_ACTIVE_ATTRIBUTES, &numAttribs);
  88         for (i = 0; i < numAttribs; i++) {
  89                 glGetActiveAttrib(prog, i, sizeof(name), &length, &size,
  90                                   &type, name);
  91                 if (strcmp(name, attrib_name) == 0) {
  92                         return piglit_check_gl_error(GL_NO_ERROR);
  93                 }
  94         }
  95
  96         printf("%s was not counted as active.\n", attrib_name);
  97         return piglit_check_gl_error(GL_NO_ERROR) && false;
  98 }
  99
 100 void
 101 piglit_init(int argc, char **argv)
 102 {
 103         bool pass = true;
 104
 105         prog = piglit_build_simple_program(vstext, fstext);
 106
 107         glLinkProgram(prog);
 108         if (!piglit_link_check_status(prog)) {
 109                 glDeleteProgram(prog);
 110                 piglit_report_result(PIGLIT_FAIL);
 111         }
 112
 113         pass = check_that_attrib_is_active("piglit_vertex") && pass;
 114
 115         pass = check_that_attrib_is_active("gl_InstanceID") && pass;
 116
 117         pass = check_that_attrib_is_active("gl_VertexID") && pass;
 118
 119         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 120 }
 121
 122 enum piglit_result
 123 piglit_display(void)
 124 {
 125         /* UNREACHABLE */
 126         return PIGLIT_FAIL;
 127 }