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.h"
  38
  39 int piglit_width = 128, piglit_height = 128;
  40 int piglit_window_mode = GLUT_RGB | GLUT_DOUBLE;
  41
  42 static void
  43 set_colors(GLfloat *color_array, GLfloat *color)
  44 {
  45         int i;
  46
  47         for (i = 0; i < 4; i++) {
  48                 color_array[i * 4 + 0] = color[0];
  49                 color_array[i * 4 + 1] = color[1];
  50                 color_array[i * 4 + 2] = color[2];
  51                 color_array[i * 4 + 3] = 1.0;
  52         }
  53 }
  54
  55 enum piglit_result
  56 piglit_display(void)
  57 {
  58         GLfloat vertices[4][2];
  59         GLfloat colors[16];
  60         GLboolean pass = GL_TRUE;
  61         GLfloat red[3]    = {1.0, 0.0, 0.0};
  62         GLfloat green[3]  = {0.0, 1.0, 0.0};
  63         GLfloat blue[3]   = {0.0, 0.0, 1.0};
  64         GLfloat black[3]  = {0.0, 0.0, 0.0};
  65
  66         glClearColor(0.0, 0.0, 0.0, 0.0);
  67         glClear(GL_COLOR_BUFFER_BIT);
  68
  69         glColorPointer(4, GL_FLOAT, 0, colors);
  70         glEnableClientState(GL_COLOR_ARRAY);
  71
  72         /* Draw the vertices enabled once on the left side for sanity */
  73         vertices[0][0] = 0.0;
  74         vertices[0][1] = 0.0;
  75         vertices[1][0] = 0.3;
  76         vertices[1][1] = 0.0;
  77         vertices[2][0] = 0.3;
  78         vertices[2][1] = 1.0;
  79         vertices[3][0] = 0.0;
  80         vertices[3][1] = 1.0;
  81         glVertexPointer(2, GL_FLOAT, 0, vertices);
  82         glEnableClientState(GL_VERTEX_ARRAY);
  83         set_colors(colors, red);
  84         glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
  85
  86         /* Now disable and draw again. */
  87         vertices[0][0] = 0.3;
  88         vertices[0][1] = 0.0;
  89         vertices[1][0] = 0.7;
  90         vertices[1][1] = 0.0;
  91         vertices[2][0] = 0.7;
  92         vertices[2][1] = 1.0;
  93         vertices[3][0] = 0.3;
  94         vertices[3][1] = 1.0;
  95         /* This NULL pointer set was key in triggering the bug reported. */
  96         glVertexPointer (2, GL_FLOAT, 0, NULL);
  97         glDisableClientState(GL_VERTEX_ARRAY);
  98         glDisableClientState(GL_COLOR_ARRAY);
  99         set_colors(colors, green);
 100         glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
 101
 102         /* Now draw again enabled, to make sure the hardware hasn't given
 103          * up on us.
 104          */
 105         vertices[0][0] = 0.7;
 106         vertices[0][1] = 0.0;
 107         vertices[1][0] = 1.0;
 108         vertices[1][1] = 0.0;
 109         vertices[2][0] = 1.0;
 110         vertices[2][1] = 1.0;
 111         vertices[3][0] = 0.7;
 112         vertices[3][1] = 1.0;
 113         glVertexPointer(2, GL_FLOAT, 0, vertices);
 114         glEnableClientState(GL_VERTEX_ARRAY);
 115         glEnableClientState(GL_COLOR_ARRAY);
 116         set_colors(colors, blue);
 117         glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
 118         glutSwapBuffers();
 119
 120         pass &= piglit_probe_pixel_rgb(piglit_width * 1 / 6,
 121                                        piglit_height / 2, red);
 122         pass &= piglit_probe_pixel_rgb(piglit_width * 3 / 6,
 123                                        piglit_height / 2, black);
 124         pass &= piglit_probe_pixel_rgb(piglit_width * 5 / 6,
 125                                        piglit_height / 2, blue);
 126
 127         return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
 128 }
 129
 130
 131 static void Reshape(int width, int height)
 132 {
 133         piglit_width = width;
 134         piglit_height = height;
 135         glViewport(0, 0, width, height);
 136         glMatrixMode(GL_PROJECTION);
 137         glLoadIdentity();
 138         glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 139         glMatrixMode(GL_MODELVIEW);
 140         glLoadIdentity();
 141 }
 142
 143 void
 144 piglit_init(int argc, char *argv[])
 145 {
 146         glutReshapeFunc(Reshape);
 147 }