tests/spec/arb_draw_indirect/draw-arrays-prim-restart.c

   1 /*
   2  * Copyright © 2014 Advanced Micro Devices, Inc.
   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  * Test if primitive restart is ignored by glDrawArraysIndirect.
  26  *
  27  * glspec45 says since version 20141030 primitive restart only affects
  28  * glDrawElements* calls. This is supposed to be a retroactive change.
  29  * (See also https://bugs.freedesktop.org/show_bug.cgi?id=93308)
  30  */
  31
  32 #include "piglit-util-gl.h"
  33
  34 PIGLIT_GL_TEST_CONFIG_BEGIN
  35         config.supports_gl_compat_version = 33;
  36         config.supports_gl_core_version = 33;
  37         config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
  38         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  39 PIGLIT_GL_TEST_CONFIG_END
  40
  41 static const GLchar *vstext =
  42         "#version 330\n"
  43         "attribute vec2 piglit_vertex;\n"
  44         "attribute int piglit_texcoord;\n"
  45         "out vec4 color;\n"
  46         "void main()\n"
  47         "{\n"
  48         "       gl_Position = vec4(piglit_vertex, 0.0, 1.0);\n"
  49         "       color = vec4(0.0, 1.0, 0.0, 1.0);\n"
  50         "} \n";
  51
  52 static const char *fstext =
  53         "#version 330\n"
  54         "in vec4 color;\n"
  55         "void main() {\n"
  56         "       gl_FragColor = color;\n"
  57         "}\n";
  58
  59 static GLint prog;
  60
  61 enum piglit_result
  62 piglit_display(void)
  63 {
  64         static const float green[] = {0, 1, 0, 1};
  65         enum piglit_result result;
  66
  67         glClear(GL_COLOR_BUFFER_BIT);
  68         glDrawArraysIndirect(GL_TRIANGLES, NULL);
  69
  70         result = piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height,
  71                                         green)
  72                 ? PIGLIT_PASS : PIGLIT_FAIL;
  73
  74         piglit_present_results();
  75         return result;
  76 }
  77
  78 void
  79 piglit_init(int argc, char **argv)
  80 {
  81         static const float pos[] = {
  82                 -1, -1,
  83                 -1,  1,
  84                  1, -1,
  85                 -1,  1,
  86                  1,  1,
  87                  1, -1,
  88                  1, -1, /* dropped */
  89         };
  90         static const int indices[] = {
  91                 7, /* count */
  92                 1, /* instance count */
  93                 0, /* start */
  94                 0, /* start instance */
  95         };
  96         GLuint vao, buf, indirect_buf;
  97
  98         piglit_require_gl_version(33);
  99         piglit_require_extension("GL_ARB_draw_indirect");
 100         prog = piglit_build_simple_program(vstext, fstext);
 101         glUseProgram(prog);
 102
 103         glGenVertexArrays(1, &vao);
 104         glBindVertexArray(vao);
 105
 106         glGenBuffers(1, &buf);
 107         glBindBuffer(GL_ARRAY_BUFFER, buf);
 108         glBufferData(GL_ARRAY_BUFFER, sizeof(pos), pos, GL_STATIC_DRAW);
 109
 110         glGenBuffers(1, &indirect_buf);
 111         glBindBuffer(GL_DRAW_INDIRECT_BUFFER, indirect_buf);
 112         glBufferData(GL_DRAW_INDIRECT_BUFFER, sizeof(indices), indices,
 113                      GL_STATIC_DRAW);
 114
 115         glEnableVertexAttribArray(PIGLIT_ATTRIB_POS);
 116         glVertexAttribPointer(PIGLIT_ATTRIB_POS, 2, GL_FLOAT, 0, 0, NULL);
 117
 118         glEnable(GL_PRIMITIVE_RESTART);
 119         glPrimitiveRestartIndex(3);
 120 }