tests/shaders/useprogram-inside-begin.c

   1 /*
   2  * Copyright © 2010 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  * \file useprogram-inside-begin.c
  26  * Verify that calling glUseProgram inside a glBegin/glEnd pair causes an error
  27  *
  28  * \author Ian Romanick <ian.d.romanick@intel.com>
  29  */
  30 #include "piglit-util-gl.h"
  31
  32 PIGLIT_GL_TEST_CONFIG_BEGIN
  33
  34         config.supports_gl_compat_version = 10;
  35
  36         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  37
  38 PIGLIT_GL_TEST_CONFIG_END
  39
  40 static const char vs_text[] =
  41         "void main() { gl_Position = gl_Vertex; }";
  42
  43 static const char fs_text[] =
  44         "void main() { gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0); }";
  45
  46 enum piglit_result
  47 piglit_display(void)
  48 {
  49         return PIGLIT_FAIL;
  50 }
  51
  52 void
  53 piglit_init(int argc, char **argv)
  54 {
  55         enum piglit_result result = PIGLIT_PASS;
  56         GLint prog;
  57         GLint fs;
  58         GLint vs;
  59         GLenum err;
  60
  61         piglit_require_gl_version(20);
  62
  63         vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_text);
  64         fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs_text);
  65
  66         prog = piglit_link_simple_program(vs, fs);
  67         glUseProgram(prog);
  68
  69         /* There shouldn't be any GL errors, but clear them all just to be
  70          * sure.
  71          */
  72         while (glGetError() != 0)
  73                 /* empty */ ;
  74
  75         glBegin(GL_TRIANGLE_STRIP);
  76         glUseProgram(0);
  77         glEnd();
  78
  79         err = glGetError();
  80         if (err != GL_INVALID_OPERATION) {
  81                 printf("Unexpected OpenGL error state 0x%04x for "
  82                        "glUseProgram(0) "
  83                        "inside glBegin/glEnd pair (expected 0x%04x).\n",
  84                        err, GL_INVALID_OPERATION);
  85                 result = PIGLIT_FAIL;
  86         }
  87
  88         while (glGetError() != 0)
  89                 /* empty */ ;
  90
  91         /* Try again, but re-use the same program.  This should still generate
  92          * an error even though it's a no-op.
  93          */
  94         glUseProgram(prog);
  95
  96         glBegin(GL_TRIANGLE_STRIP);
  97         glUseProgram(prog);
  98         glEnd();
  99
 100         err = glGetError();
 101         if (err != GL_INVALID_OPERATION) {
 102                 printf("Unexpected OpenGL error state 0x%04x for "
 103                        "glUseProgram(prog) "
 104                        "inside glBegin/glEnd pair (expected 0x%04x).\n",
 105                        err, GL_INVALID_OPERATION);
 106                 result = PIGLIT_FAIL;
 107         }
 108
 109         piglit_report_result(result);
 110 }