tests/fbo/fbo-nodepth-test.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 /** @file fbo-nodepth-test.c
  29  *
  30  * Tests that when the FBO has no depth buffer, the depth test always
  31  * succeeds regardless of depth func.
  32  */
  33
  34 #include "piglit-util-gl.h"
  35
  36 PIGLIT_GL_TEST_CONFIG_BEGIN
  37
  38         config.supports_gl_compat_version = 10;
  39
  40         /* Drivers that do not support GL_ARB_texture_non_power_of_two require
  41          * window dimensions that are powers of two for this test.
  42          */
  43         config.window_width = next_power_of_two(config.window_width);
  44         config.window_height = next_power_of_two(config.window_height);
  45
  46         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  47         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  48
  49 PIGLIT_GL_TEST_CONFIG_END
  50
  51 enum piglit_result
  52 piglit_display(void)
  53 {
  54         GLboolean pass = GL_TRUE;
  55         GLuint tex, fb;
  56         GLenum status;
  57         float green[] = {0, 1, 0, 0};
  58
  59         glGenTextures(1, &tex);
  60         glBindTexture(GL_TEXTURE_2D, tex);
  61         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
  62                      piglit_width, piglit_height, 0,
  63                      GL_RGBA, GL_UNSIGNED_BYTE, NULL);
  64
  65         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  66         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  67
  68         glGenFramebuffersEXT(1, &fb);
  69         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
  70         glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
  71                                   GL_COLOR_ATTACHMENT0_EXT,
  72                                   GL_TEXTURE_2D,
  73                                   tex,
  74                                   0);
  75         if (!piglit_check_gl_error(GL_NO_ERROR))
  76                 piglit_report_result(PIGLIT_FAIL);
  77
  78         status = glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT);
  79         if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
  80                 fprintf(stderr, "fbo incomplete (status = 0x%04x)\n", status);
  81                 piglit_report_result(PIGLIT_SKIP);
  82         }
  83
  84         glClearColor(1.0, 0.0, 0.0, 0.0);
  85         glClear(GL_COLOR_BUFFER_BIT);
  86         glEnable(GL_DEPTH_TEST);
  87         glDepthFunc(GL_NEVER);
  88         glColor4fv(green);
  89         piglit_draw_rect(0, 0, piglit_width, piglit_height);
  90
  91         pass = pass && piglit_probe_rect_rgb(0, 0, piglit_width, piglit_height, green);
  92
  93         glDisable(GL_DEPTH_TEST);
  94         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, piglit_winsys_fbo);
  95         glEnable(GL_TEXTURE_2D);
  96         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
  97         piglit_draw_rect_tex(0, 0, piglit_width, piglit_height,
  98                              0, 0, 1, 1);
  99         glDisable(GL_TEXTURE_2D);
 100
 101         piglit_present_results();
 102
 103         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 104 }
 105
 106 void
 107 piglit_init(int argc, char **argv)
 108 {
 109         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 110
 111         piglit_require_extension("GL_EXT_framebuffer_object");
 112 }