tests/spec/arb_draw_indirect/draw-elements-base-instance.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 interaction with base instance */
  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
  49         glViewport(0, 0, 128, 128);
  50
  51         glClearColor(0,0,1,1);
  52         glClear(GL_COLOR_BUFFER_BIT);
  53
  54         glBindVertexArray(vao);
  55         glUseProgram(prog);
  56
  57         glDrawElementsIndirect(GL_TRIANGLES, GL_UNSIGNED_SHORT, (GLvoid const *)0);
  58
  59         glUseProgram(0);
  60
  61         piglit_present_results();
  62
  63         pass = piglit_probe_pixel_rgb(32, 32, green) && pass;
  64         pass = piglit_probe_pixel_rgb(96, 96, blue) && pass;
  65
  66         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
  67 }
  68
  69 float vertices_data[] = {
  70         -1, -1,
  71          1, -1,
  72         -1,  1,
  73 };
  74
  75 int instance_data[] = { 0, 0, 0, 0, 42, 0, 0 };
  76
  77 unsigned short indices_data[] = {
  78         0, 1, 2,
  79 };
  80
  81 GLuint indirect_data[] = {
  82         3,              /* count */
  83         1,              /* primcount */
  84         0,              /* first index */
  85         0,              /* base vertex */
  86         4,              /* base instance */
  87 };
  88
  89 void
  90 piglit_init(int argc, char **argv)
  91 {
  92         GLuint vertices_bo;
  93         GLuint instance_bo;
  94         GLuint indices_bo;
  95         GLuint indirect_bo;
  96
  97         piglit_require_extension("GL_ARB_draw_indirect");
  98         piglit_require_extension("GL_ARB_base_instance");
  99         piglit_require_extension("GL_ARB_instanced_arrays");
 100
 101         glGenVertexArrays(1, &vao);
 102         glBindVertexArray(vao);
 103
 104         glGenBuffers(1, &vertices_bo);
 105         glBindBuffer(GL_ARRAY_BUFFER, vertices_bo);
 106         glBufferData(GL_ARRAY_BUFFER, sizeof(vertices_data), vertices_data, GL_STATIC_DRAW);
 107         glEnableVertexAttribArray(0);
 108         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);
 109
 110         glGenBuffers(1, &instance_bo);
 111         glBindBuffer(GL_ARRAY_BUFFER, instance_bo);
 112         glBufferData(GL_ARRAY_BUFFER, sizeof(instance_data), instance_data, GL_STATIC_DRAW);
 113         glEnableVertexAttribArray(1);
 114         glVertexAttribIPointer(1, 1, GL_INT, 0, 0);
 115         glVertexAttribDivisorARB(1, 1);
 116
 117         glGenBuffers(1, &indices_bo);
 118         glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indices_bo);
 119         glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices_data), indices_data, GL_STATIC_DRAW);
 120
 121         glGenBuffers(1, &indirect_bo);
 122         glBindBuffer(GL_DRAW_INDIRECT_BUFFER, indirect_bo);
 123         glBufferData(GL_DRAW_INDIRECT_BUFFER, sizeof(indirect_data), indirect_data, GL_STATIC_DRAW);
 124
 125         prog = piglit_build_simple_program(
 126                         "#version 130\n"
 127                         "#extension GL_ARB_explicit_attrib_location: require\n"
 128                         "#extension GL_ARB_draw_instanced: require\n"
 129                         "\n"
 130                         "layout(location=0) in vec2 pos;\n"
 131                         "layout(location=1) in int instance_in;\n"
 132                         "\n"
 133                         "flat out int instance;\n"
 134                         "\n"
 135                         "void main() {\n"
 136                         "       gl_Position = vec4(pos, 0, 1);\n"
 137                         "       instance = instance_in;\n"
 138                         "}\n",
 139
 140                         "#version 130\n"
 141                         "\n"
 142                         "flat in int instance;\n"
 143                         "\n"
 144                         "void main() {\n"
 145                         "       if (instance == 42) {\n"
 146                         "               gl_FragColor = vec4(0,1,0,1);\n"
 147                         "       } else {\n"
 148                         "               gl_FragColor = vec4(1,0,0,1);\n"
 149                         "       }\n"
 150                         "}\n");
 151
 152         glBindVertexArray(0);
 153 }