tests/spec/ext_transform_feedback/pipeline-basic-primgen.c

   1 /*
   2  * Copyright © 2013 Marek Olšák <maraeo@gmail.com>
   3  * Copyright © 2013 Intel Corporation
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  22  * IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * Tests if PRIMITIVES_GENERATED works with transform feedback disabled.
  27  *
  28  * From EXT_transform_feedback:
  29  *    "the primitives-generated count is incremented every time a primitive
  30  *     reaches the Discarding Rasterization stage"
  31  */
  32
  33 #include "piglit-util-gl.h"
  34
  35 PIGLIT_GL_TEST_CONFIG_BEGIN
  36
  37         config.supports_gl_compat_version = 10;
  38         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
  39         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  40
  41 PIGLIT_GL_TEST_CONFIG_END
  42
  43 static const char *vstext = "void main() { gl_Position = gl_Vertex; }";
  44
  45 void piglit_init(int argc, char **argv)
  46 {
  47         unsigned qresult;
  48         int expected = 2;
  49         GLuint vs;
  50         GLuint prog;
  51         GLuint q;
  52
  53         /* Check the driver. */
  54         piglit_require_gl_version(15);
  55         piglit_require_GLSL();
  56         piglit_require_transform_feedback();
  57
  58         glGenQueries(1, &q);
  59
  60         glEnable(GL_RASTERIZER_DISCARD);
  61
  62         /* Create shaders. */
  63         vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vstext);
  64         prog = glCreateProgram();
  65         glAttachShader(prog, vs);
  66         glLinkProgram(prog);
  67         if (!piglit_link_check_status(prog)) {
  68                 glDeleteProgram(prog);
  69                 piglit_report_result(PIGLIT_FAIL);
  70         }
  71         glUseProgram(prog);
  72
  73         /* Draw a rectangle; make sure two primitives were generated. */
  74         glBeginQuery(GL_PRIMITIVES_GENERATED, q);
  75         piglit_draw_rect(-1, -1, 2, 2);
  76         glEndQuery(GL_PRIMITIVES_GENERATED);
  77         glGetQueryObjectuiv(q, GL_QUERY_RESULT, &qresult);
  78
  79         if (qresult != expected) {
  80                 printf("Primitives generated: %i,  Expected: %i\n",
  81                        qresult, expected);
  82                 piglit_report_result(PIGLIT_FAIL);
  83         }
  84
  85         piglit_report_result(PIGLIT_PASS);
  86 }
  87
  88 enum piglit_result piglit_display(void)
  89 {
  90         return PIGLIT_FAIL; /* should not get here */
  91 }