tests/spec/arb_vertex_buffer_object/elements-negative-offset.c

   1 /*
   2  * Copyright © 2011 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
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 /** @file elements-negative-offset.c
  25  *
  26  * Tests for a bug in the i965 driver.  When moving all VBO pointers
  27  * down by the same offset in the same batchbuffer, it would be unable
  28  * to access the new vertex data.
  29  */
  30
  31 #include "piglit-util-gl.h"
  32
  33 PIGLIT_GL_TEST_CONFIG_BEGIN
  34
  35         config.supports_gl_compat_version = 10;
  36
  37         config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
  38         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  39
  40 PIGLIT_GL_TEST_CONFIG_END
  41
  42 static GLuint vbo;
  43
  44 void
  45 piglit_init(int argc, char **argv)
  46 {
  47         piglit_require_extension("GL_ARB_vertex_buffer_object");
  48 }
  49
  50 enum piglit_result
  51 piglit_display(void)
  52 {
  53         bool pass = true;
  54         float green[] = {0.0, 1.0, 0.0, 0.0};
  55         float blue[] = {0.0, 0.0, 1.0, 0.0};
  56         float vertex_data[] = {
  57                 /* quad 1 position */
  58                 -1.0, -1.0, 0.0, 1.0,
  59                  0.0, -1.0, 0.0, 1.0,
  60                  0.0,  1.0, 0.0, 1.0,
  61                 -1.0,  1.0, 0.0, 1.0,
  62
  63                 /* quad 1 color */
  64                 0.0, 1.0, 0.0, 0.0,
  65                 0.0, 1.0, 0.0, 0.0,
  66                 0.0, 1.0, 0.0, 0.0,
  67                 0.0, 1.0, 0.0, 0.0,
  68
  69                 /* quad 0 position */
  70                  0.0, -1.0, 0.0, 1.0,
  71                  1.0, -1.0, 0.0, 1.0,
  72                  1.0,  1.0, 0.0, 1.0,
  73                  0.0,  1.0, 0.0, 1.0,
  74
  75                 /* quad 0 color */
  76                 0.0, 0.0, 1.0, 0.0,
  77                 0.0, 0.0, 1.0, 0.0,
  78                 0.0, 0.0, 1.0, 0.0,
  79                 0.0, 0.0, 1.0, 0.0,
  80         };
  81         intptr_t quad0_pos_offset = 8 * 4 * sizeof(float);
  82         intptr_t quad0_color_offset = 12 * 4 * sizeof(float);
  83         intptr_t quad1_pos_offset = 0;
  84         intptr_t quad1_color_offset = 4 * 4 * sizeof(float);
  85
  86         glClearColor(1.0, 0.0, 0.0, 0.0);
  87         glClear(GL_COLOR_BUFFER_BIT);
  88
  89         glGenBuffersARB(1, &vbo);
  90         glBindBufferARB(GL_ARRAY_BUFFER_ARB, vbo);
  91         glBufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(vertex_data),
  92                         vertex_data, GL_DYNAMIC_DRAW);
  93         glEnableClientState(GL_VERTEX_ARRAY);
  94         glEnableClientState(GL_COLOR_ARRAY);
  95
  96         glVertexPointer(4, GL_FLOAT, 0, (void *)quad0_pos_offset);
  97         glColorPointer(4, GL_FLOAT, 0, (void *)quad0_color_offset);
  98         glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
  99
 100         glVertexPointer(4, GL_FLOAT, 0, (void *)quad1_pos_offset);
 101         glColorPointer(4, GL_FLOAT, 0, (void *)quad1_color_offset);
 102         glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
 103
 104         pass = piglit_probe_rect_rgba(0, 0,
 105                                       piglit_width / 2, piglit_height / 2,
 106                                       green) && pass;
 107         pass = piglit_probe_rect_rgba(piglit_width / 2, 0,
 108                                       piglit_width / 2, piglit_height / 2,
 109                                       blue) && pass;
 110
 111         piglit_present_results();
 112
 113         glDisableClientState(GL_VERTEX_ARRAY);
 114         glDisableClientState(GL_COLOR_ARRAY);
 115         glDeleteBuffersARB(1, &vbo);
 116
 117         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 118 }