tests/general/lineloop.c

   1 /*
   2  * Copyright (c) 2014 VMware, 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 DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 /**
  25  * @file lineloop.c
  26  *
  27  * Test line loop with many vertices.
  28  * No additional lines should appear due to buffer splitting.
  29  */
  30
  31 #include "piglit-util-gl.h"
  32
  33 #define WSIZE 400
  34
  35 PIGLIT_GL_TEST_CONFIG_BEGIN
  36
  37         config.supports_gl_compat_version = 10;
  38         config.window_width = WSIZE;
  39         config.window_height = WSIZE;
  40         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  41
  42 PIGLIT_GL_TEST_CONFIG_END
  43
  44 static const char *TestName = "lineloop";
  45 static int vert_count = 10000;
  46 static bool use_dlist = false;
  47 static GLuint dlist;
  48
  49
  50 static void
  51 draw(GLuint numVerts, float radius)
  52 {
  53    GLuint i;
  54
  55    glColor3f(1,0,1);
  56    glBegin(GL_LINE_LOOP);
  57    for (i = 0; i < numVerts; i++) {
  58       float x = radius * sin(i*M_PI*2/numVerts);
  59       float y = radius * cos(i*M_PI*2/numVerts);
  60       glVertex3f(x, y, 0);
  61    }
  62    glEnd();
  63 }
  64
  65 static void
  66 test_prims(void)
  67 {
  68    if (!piglit_automatic)
  69       printf("%s: %u vertices\n", TestName, vert_count);
  70
  71    glClear(GL_COLOR_BUFFER_BIT);
  72
  73    if (use_dlist) {
  74       glCallList(dlist);
  75    } else {
  76       draw(vert_count, 1.0);
  77    }
  78    piglit_present_results();
  79 }
  80
  81
  82 enum piglit_result
  83 piglit_display(void)
  84 {
  85    float expected[4] = {0.0f, 0.0f, 0.0f, 0.0f};
  86    int pass;
  87    int half_quad = (int)((float)(WSIZE/2) / sqrt(2.0f) - 1.0f);
  88    test_prims();
  89    pass = piglit_probe_rect_rgb(WSIZE / 2 - half_quad,
  90                                 WSIZE / 2 - half_quad,
  91                                 half_quad, half_quad, expected);
  92    return pass ? PIGLIT_PASS : PIGLIT_FAIL;
  93 }
  94
  95
  96 void
  97 piglit_init(int argc, char**argv)
  98 {
  99    int i;
 100    for (i = 1; i < argc; ++i) {
 101       if (i < argc) {
 102          if (strcmp(argv[i], "-count") == 0) {
 103             i++;
 104             if (i == argc) {
 105                printf("please specify vertex count\n");
 106                piglit_report_result(PIGLIT_FAIL);
 107             }
 108             vert_count = strtoul(argv[i], NULL, 0);
 109          }
 110          else if (strcmp(argv[i], "-dlist") == 0) {
 111             use_dlist = true;
 112          }
 113       }
 114    }
 115
 116    glViewport(0,0, WSIZE, WSIZE);
 117    glOrtho(-1,1,-1,1,-1,1);
 118
 119    if (use_dlist) {
 120       dlist = glGenLists(1);
 121       glNewList(dlist, GL_COMPILE);
 122       draw(vert_count, 1.0);
 123       glEndList();
 124    }
 125 }