tests/spec/arb_shader_atomic_counters/respecify-buffer.c

   1 /*
   2  * Copyright © 2014 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 /** @file respecify-buffer.c
  25  *
  26  * Tests that the required state is reemitted when the buffer backing
  27  * an atomic counter is respecified; taking care not to dirty too much
  28  * other state which would mask flagging problems.
  29  *
  30  * This demonstrates a mesa bug.
  31  */
  32
  33 #include "common.h"
  34
  35 PIGLIT_GL_TEST_CONFIG_BEGIN
  36
  37         config.supports_gl_core_version = 31;
  38
  39         config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
  40         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  41
  42 PIGLIT_GL_TEST_CONFIG_END
  43
  44 int data[] = { 0, 1, 2, 3 };
  45
  46 float red[] = { 1, 0, 0 };
  47 float green[] = { 0, 1, 0 };
  48 float blue[] = { 0, 0, 1 };
  49 float white[] = { 1, 1, 1 };
  50
  51 enum piglit_result
  52 piglit_display(void)
  53 {
  54         bool pass;
  55         int i;
  56
  57         glViewport(0, 0, piglit_width, piglit_height);
  58
  59         glClearColor(0.2, 0.2, 0.2, 0.2);
  60         glClear(GL_COLOR_BUFFER_BIT);
  61
  62         for (i = 0; i < 4; i++) {
  63                 /* respecify the buffer */
  64                 glBufferData(GL_ATOMIC_COUNTER_BUFFER, sizeof(*data),
  65                              &data[i], GL_STATIC_DRAW);
  66
  67                 piglit_draw_rect(i % 2 - 1, i / 2 - 1, 1, 1);
  68         }
  69
  70         pass = piglit_probe_pixel_rgb(piglit_width / 4,
  71                                       piglit_height / 4, red);
  72         pass = piglit_probe_pixel_rgb(3 * piglit_width / 4,
  73                                       piglit_height / 4, green) && pass;
  74         pass = piglit_probe_pixel_rgb(piglit_width / 4,
  75                                       3 * piglit_height / 4, blue) && pass;
  76         pass = piglit_probe_pixel_rgb(3 * piglit_width / 4,
  77                                       3 * piglit_height / 4, white) && pass;
  78
  79         piglit_present_results();
  80
  81         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
  82 }
  83
  84 void
  85 piglit_init(int argc, char **argv)
  86 {
  87         GLuint prog;
  88         GLuint abo;
  89
  90         piglit_require_extension("GL_ARB_shader_atomic_counters");
  91
  92         prog = piglit_build_simple_program(
  93                 "#version 140\n"
  94                 "in vec4 piglit_vertex;\n"
  95                 "void main() {\n"
  96                 "       gl_Position = piglit_vertex;\n"
  97                 "}\n",
  98
  99                 "#version 140\n"
 100                 "#extension GL_ARB_shader_atomic_counters: require\n"
 101                 "layout(binding=0) uniform atomic_uint x;\n"
 102                 "void main() {\n"
 103                 "       uint n = atomicCounter(x);\n"
 104                 "       if (n == 0u) gl_FragColor = vec4(1,0,0,0);\n"
 105                 "       else if (n == 1u) gl_FragColor = vec4(0,1,0,0);\n"
 106                 "       else if (n == 2u) gl_FragColor = vec4(0,0,1,0);\n"
 107                 "       else gl_FragColor = vec4(1,1,1,0);\n"
 108                 "}\n");
 109
 110         glUseProgram(prog);
 111
 112         glGenBuffers(1, &abo);
 113         glBindBuffer(GL_ATOMIC_COUNTER_BUFFER, abo);
 114         glBufferData(GL_ATOMIC_COUNTER_BUFFER, 4, NULL, GL_STATIC_DRAW);
 115         glBindBufferBase(GL_ATOMIC_COUNTER_BUFFER, 0, abo);
 116 }