tests/spec/arb_transform_feedback3/set_varyings_with_invalid_args.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 #include "piglit-util-gl.h"
  25 #include "xfb3_common.h"
  26
  27 /**
  28  * @file set_varyings_with_invalid_args.c
  29  *
  30  * Tests that TransformFeedbackVaryings() does not accept non-existing program
  31  * and that the upper limit for the number of attributes is guarded. The spec:
  32  *
  33  * "The error INVALID_VALUE is generated by TransformFeedbackVaryings if
  34  *  <program> is not the name of a program object, or if <bufferMode> is
  35  *  SEPARATE_ATTRIBS and <count> is greater than the limit
  36  *  MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS."
  37  *
  38  * Additionally accept following common rule with shader object API, specified
  39  * by the 'Shader Objects' section of OpenGL spec:
  40  *
  41  * "Commands that accept shader or program object names will generate the error
  42  * INVALID VALUE if the provided name is not the name of either a shader or pro-
  43  * gram object and INVALID OPERATION if the provided name identifies an object
  44  * that is not the expected type."
  45  */
  46
  47 PIGLIT_GL_TEST_CONFIG_BEGIN
  48
  49         config.supports_gl_compat_version = 32;
  50         config.supports_gl_core_version = 32;
  51         config.khr_no_error_support = PIGLIT_HAS_ERRORS;
  52
  53 PIGLIT_GL_TEST_CONFIG_END
  54
  55 static const char gs_simple_text[] =
  56         "#version 150\n"
  57         "layout(points) in;\n"
  58         "layout(points, max_vertices = 1) out;\n"
  59         "out float x1_out;\n"
  60         "void main() {\n"
  61         "  gl_Position = gl_in[0].gl_Position;\n"
  62         "  x1_out = 1.0;\n"
  63         "}";
  64
  65 static const char *varyings[] = { "x1_out" };
  66
  67 /**
  68  * Dynamically reserve space and setup an array of 'n' string pointers all
  69  * referring to 'varyings'. For testing the upper bound of attributes expected
  70  * the string values do not need to be mutually unique but in order to respect
  71  * the API there should be as many strings available in the array as claimed.
  72  */
  73 static void
  74 try_max_varyings(GLuint prog, unsigned n)
  75 {
  76         const char **var_array;
  77         unsigned i;
  78
  79         var_array = (const char**)malloc(n * sizeof(const char *));
  80
  81         for (i = 0; i < n; ++i)
  82                 var_array[i] = varyings[0];
  83
  84         glTransformFeedbackVaryings(prog, n, var_array, GL_SEPARATE_ATTRIBS);
  85
  86         free(var_array);
  87 }
  88
  89 void
  90 piglit_init(int argc, char **argv)
  91 {
  92         GLuint vs, gs, prog;
  93         GLint max_attrib_n;
  94
  95         piglit_require_extension("GL_ARB_transform_feedback3");
  96
  97         glGetIntegerv(GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS,
  98                 &max_attrib_n);
  99         if (!max_attrib_n) {
 100                 printf("Maximum number of separete attributes is zero\n");
 101                 piglit_report_result(PIGLIT_FAIL);
 102         }
 103
 104         vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_pass_thru_text);
 105         gs = piglit_compile_shader_text(GL_GEOMETRY_SHADER, gs_simple_text);
 106
 107         if (!vs || !gs)
 108                 piglit_report_result(PIGLIT_FAIL);
 109
 110         prog = glCreateProgram();
 111         glAttachShader(prog, vs);
 112         glAttachShader(prog, gs);
 113         glLinkProgram(prog);
 114
 115         if(!piglit_link_check_status(prog))
 116                 piglit_report_result(PIGLIT_FAIL);
 117
 118         /* Try invalid program */
 119         glTransformFeedbackVaryings(42, ARRAY_SIZE(varyings), varyings,
 120                                 GL_INTERLEAVED_ATTRIBS);
 121         if (!piglit_check_gl_error(GL_INVALID_VALUE))
 122                 piglit_report_result(PIGLIT_FAIL);
 123
 124         /* Try shader in place of program. */
 125         glTransformFeedbackVaryings(vs, ARRAY_SIZE(varyings), varyings,
 126                                 GL_INTERLEAVED_ATTRIBS);
 127         if (!piglit_check_gl_error(GL_INVALID_OPERATION))
 128                 piglit_report_result(PIGLIT_FAIL);
 129
 130         /* Try too many attributes */
 131         try_max_varyings(prog, max_attrib_n + 1);
 132         if (!piglit_check_gl_error(GL_INVALID_VALUE))
 133                 piglit_report_result(PIGLIT_FAIL);
 134
 135         piglit_report_result(PIGLIT_PASS);
 136 }
 137
 138 enum piglit_result
 139 piglit_display(void)
 140 {
 141         /* Should never be reached */
 142         return PIGLIT_FAIL;
 143 }