tests/spec/arb_draw_indirect/draw-arrays-instances.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 /* Basic test of glDrawElementsIndirect */
  26
  27 #include "piglit-util-gl.h"
  28
  29 PIGLIT_GL_TEST_CONFIG_BEGIN
  30
  31         config.supports_gl_core_version = 31;
  32
  33         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGB;
  34         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  35
  36 PIGLIT_GL_TEST_CONFIG_END
  37
  38 GLuint vao;
  39 GLint prog;
  40
  41 float green[] = {0,1,0};
  42 float blue[] = {0,0,1};
  43
  44 enum piglit_result
  45 piglit_display(void)
  46 {
  47         bool pass = true;
  48         int i;
  49
  50         glViewport(0, 0, 128, 128);
  51
  52         glClearColor(0,0,1,1);
  53         glClear(GL_COLOR_BUFFER_BIT);
  54
  55         glBindVertexArray(vao);
  56         glUseProgram(prog);
  57
  58         glDrawArraysIndirect(GL_TRIANGLE_STRIP, (GLvoid const *)0);
  59
  60         glUseProgram(0);
  61
  62         piglit_present_results();
  63
  64         for (i = 0; i < 8; i++)
  65                 pass = piglit_probe_pixel_rgb( 8 + 16 * i, 64, green) && pass;
  66
  67         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
  68 }
  69
  70 float vertices_data[] = {
  71         -1, -1,
  72          1, -1,
  73         -1,  1,
  74          1,  1,
  75 };
  76
  77 GLuint indirect_data[] = {
  78         4,              /* count */
  79         8,              /* primcount */
  80         0,              /* first vertex */
  81         0,              /* mbz */
  82 };
  83
  84 void
  85 piglit_init(int argc, char **argv)
  86 {
  87         GLuint vertices_bo;
  88         GLuint indirect_bo;
  89
  90         piglit_require_extension("GL_ARB_draw_indirect");
  91
  92         glGenVertexArrays(1, &vao);
  93         glBindVertexArray(vao);
  94
  95         glGenBuffers(1, &vertices_bo);
  96         glBindBuffer(GL_ARRAY_BUFFER, vertices_bo);
  97         glBufferData(GL_ARRAY_BUFFER, sizeof(vertices_data), vertices_data, GL_STATIC_DRAW);
  98         glEnableVertexAttribArray(0);
  99         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);
 100
 101         glGenBuffers(1, &indirect_bo);
 102         glBindBuffer(GL_DRAW_INDIRECT_BUFFER, indirect_bo);
 103         glBufferData(GL_DRAW_INDIRECT_BUFFER, sizeof(indirect_data), indirect_data, GL_STATIC_DRAW);
 104
 105         prog = piglit_build_simple_program(
 106                         "#version 140\n"
 107                         "#extension GL_ARB_explicit_attrib_location: require\n"
 108                         "\n"
 109                         "layout(location=0) in vec2 pos;\n"
 110                         "\n"
 111                         "void main() {\n"
 112                         "       float x = -0.875 + gl_InstanceID * 0.25 + 0.075 * pos.x;\n"
 113                         "       float y = 0.075 * pos.y;\n"
 114                         "       gl_Position = vec4(x, y, 0, 1);\n"
 115                         "}\n",
 116
 117                         "#version 140\n"
 118                         "\n"
 119                         "void main() {\n"
 120                         "       gl_FragColor = vec4(0,1,0,1);\n"
 121                         "}\n");
 122
 123         glBindVertexArray(0);
 124 }