tests/spec/glsl-1.50/execution/vs-named-block-no-modify.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
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24
  25 /**
  26  * \file named-block-no-modify.c
  27  *
  28  * Test that uniform variables contained within a named uniform block cannot be
  29  * accessed by the glUniform* commands.
  30  *
  31  * Section 2.11.4 (Uniform Variables) of the GL 3.2 spec says:
  32  *  "Uniforms in a named uniform block are not assigned a location and may
  33  *   not be modified using the Uniform* commands."
  34  *
  35  * Test relies on the behavior of glGetUniform returning -1 for uniforms
  36  * that have not been assigned a location, such as those in a named uniform
  37  * block.
  38 */
  39
  40 #include "piglit-util-gl.h"
  41
  42 PIGLIT_GL_TEST_CONFIG_BEGIN
  43
  44         config.supports_gl_core_version = 32;
  45         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  46
  47 PIGLIT_GL_TEST_CONFIG_END
  48
  49 /* the operations in this shader are not strictly relevant, only that they
  50  * do not get discarded */
  51 static const char vs_text[] =
  52         "#version 150\n"
  53         "\n"
  54         "in vec4 piglit_vertex;\n"
  55         "\n"
  56         "uniform testBlock {\n"
  57         "       int a;\n"
  58         "       float b;\n"
  59         "       mat4 c;\n"
  60         "};\n"
  61         "\n"
  62         "flat out int oa;\n"
  63         "out float ob;\n"
  64         "out mat4 oc;\n"
  65         "\n"
  66         "void main() {\n"
  67         "       gl_Position = piglit_vertex;\n"
  68         "       oa = a + 1;\n"
  69         "       ob = b * 2;\n"
  70         "       oc[0] = c[0] * 1;\n"
  71         "       oc[1] = c[1] * 2;\n"
  72         "       oc[2] = c[2] * 3;\n"
  73         "       oc[3] = c[3] * 4;\n"
  74         "}\n";
  75
  76 /* again, operations are just to touch data */
  77 static const char fs_text[] =
  78         "#version 150\n"
  79         "\n"
  80         "flat in int oa;\n"
  81         "in float ob;\n"
  82         "in mat4 oc;\n"
  83         "out vec4 FragColor;\n"
  84         "\n"
  85         "void main() {\n"
  86         "       FragColor = vec4(float(oa) * oc[0][0],\n"
  87         "                           ob * oc[1][1],\n"
  88         "                           oc[2][2],\n"
  89         "                           oc[3][3]);\n"
  90         "}\n";
  91
  92 static GLuint prog;
  93
  94 void
  95 piglit_init(int argc, char **argv)
  96 {
  97         bool pass = true;
  98
  99         int a_loc = -2;
 100         int b_loc = -3;
 101         int c_loc = -4;
 102
 103         prog = piglit_build_simple_program(vs_text, fs_text);
 104
 105         glUseProgram(prog);
 106
 107         /* get uniforms, locations should be -1 if glGetUniformLocation
 108          * can't retrieve their location */
 109
 110         a_loc = glGetUniformLocation(prog, "a");
 111         if(a_loc != -1) {
 112                 printf("a_loc incorrectly assigned a location: %d", a_loc);
 113                 pass = false;
 114         }
 115
 116         b_loc = glGetUniformLocation(prog, "b");
 117         if(b_loc != -1) {
 118                 printf("b_loc incorrectly assigned a location: %d", b_loc);
 119                 pass = false;
 120         }
 121
 122         c_loc = glGetUniformLocation(prog, "c");
 123         if(c_loc != -1) {
 124                 printf("c_loc incorrectly assigned a location: %d", c_loc);
 125                 pass = false;
 126         }
 127
 128         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 129 }
 130
 131 enum piglit_result
 132 piglit_display(void)
 133 {
 134         /* should not reach */
 135         return PIGLIT_FAIL;
 136 }