tests/general/varray-disabled.c

   1 /*
   2  * Copyright © 2009 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  * Authors:
  24  *    Eric Anholt <eric@anholt.net>
  25  *
  26  */
  27
  28 /**
  29  * @file varray-disabled.c
  30  *
  31  * Test whether no vertices are drawn when we call DrawArrays with no
  32  * vertex array enabled.
  33  *
  34  * http://bugs.freedesktop.org/show_bug.cgi?id=19911
  35  */
  36
  37 #include "piglit-util-gl.h"
  38
  39 PIGLIT_GL_TEST_CONFIG_BEGIN
  40
  41         config.supports_gl_compat_version = 10;
  42
  43         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  44         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  45
  46 PIGLIT_GL_TEST_CONFIG_END
  47
  48 static void
  49 set_colors(GLfloat *color_array, GLfloat *color)
  50 {
  51         int i;
  52
  53         for (i = 0; i < 4; i++) {
  54                 color_array[i * 4 + 0] = color[0];
  55                 color_array[i * 4 + 1] = color[1];
  56                 color_array[i * 4 + 2] = color[2];
  57                 color_array[i * 4 + 3] = 1.0;
  58         }
  59 }
  60
  61 enum piglit_result
  62 piglit_display(void)
  63 {
  64         GLfloat vertices[4][2];
  65         GLfloat colors[16];
  66         GLboolean pass = GL_TRUE;
  67         GLfloat red[3]    = {1.0, 0.0, 0.0};
  68         GLfloat green[3]  = {0.0, 1.0, 0.0};
  69         GLfloat blue[3]   = {0.0, 0.0, 1.0};
  70         GLfloat black[3]  = {0.0, 0.0, 0.0};
  71
  72         piglit_ortho_projection(1.0, 1.0, GL_FALSE);
  73
  74         glClearColor(0.0, 0.0, 0.0, 0.0);
  75         glClear(GL_COLOR_BUFFER_BIT);
  76
  77         glColorPointer(4, GL_FLOAT, 0, colors);
  78         glEnableClientState(GL_COLOR_ARRAY);
  79
  80         /* Draw the vertices enabled once on the left side for sanity */
  81         vertices[0][0] = 0.0;
  82         vertices[0][1] = 0.0;
  83         vertices[1][0] = 0.3;
  84         vertices[1][1] = 0.0;
  85         vertices[2][0] = 0.3;
  86         vertices[2][1] = 1.0;
  87         vertices[3][0] = 0.0;
  88         vertices[3][1] = 1.0;
  89         glVertexPointer(2, GL_FLOAT, 0, vertices);
  90         glEnableClientState(GL_VERTEX_ARRAY);
  91         set_colors(colors, red);
  92         glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
  93
  94         /* Now disable and draw again. */
  95         vertices[0][0] = 0.3;
  96         vertices[0][1] = 0.0;
  97         vertices[1][0] = 0.7;
  98         vertices[1][1] = 0.0;
  99         vertices[2][0] = 0.7;
 100         vertices[2][1] = 1.0;
 101         vertices[3][0] = 0.3;
 102         vertices[3][1] = 1.0;
 103         /* This NULL pointer set was key in triggering the bug reported. */
 104         glVertexPointer (2, GL_FLOAT, 0, NULL);
 105         glDisableClientState(GL_VERTEX_ARRAY);
 106         glDisableClientState(GL_COLOR_ARRAY);
 107         set_colors(colors, green);
 108         glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
 109
 110         /* Now draw again enabled, to make sure the hardware hasn't given
 111          * up on us.
 112          */
 113         vertices[0][0] = 0.7;
 114         vertices[0][1] = 0.0;
 115         vertices[1][0] = 1.0;
 116         vertices[1][1] = 0.0;
 117         vertices[2][0] = 1.0;
 118         vertices[2][1] = 1.0;
 119         vertices[3][0] = 0.7;
 120         vertices[3][1] = 1.0;
 121         glVertexPointer(2, GL_FLOAT, 0, vertices);
 122         glEnableClientState(GL_VERTEX_ARRAY);
 123         glEnableClientState(GL_COLOR_ARRAY);
 124         set_colors(colors, blue);
 125         glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
 126
 127         pass &= piglit_probe_pixel_rgb(piglit_width * 1 / 6,
 128                                        piglit_height / 2, red);
 129         pass &= piglit_probe_pixel_rgb(piglit_width * 3 / 6,
 130                                        piglit_height / 2, black);
 131         pass &= piglit_probe_pixel_rgb(piglit_width * 5 / 6,
 132                                        piglit_height / 2, blue);
 133
 134         piglit_present_results();
 135
 136         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 137 }
 138
 139 void
 140 piglit_init(int argc, char *argv[])
 141 {
 142 }