tests/fbo/fbo-nostencil-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-nostencil-test.c
  29  *
  30  * Tests that when the FBO has no stencil buffer, the stencil test always
  31  * succeeds regardless of stencil funcs.
  32  */
  33
  34 #include "piglit-util.h"
  35
  36 int piglit_width = 128;
  37 int piglit_height = 128;
  38 int piglit_window_mode = GLUT_RGB | GLUT_DOUBLE;
  39
  40 enum piglit_result
  41 piglit_display(void)
  42 {
  43         GLboolean pass = GL_TRUE;
  44         GLuint tex, fb;
  45         GLenum status;
  46         int x, y;
  47         float green[] = {0, 1, 0, 0};
  48
  49         glGenTextures(1, &tex);
  50         glBindTexture(GL_TEXTURE_2D, tex);
  51         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
  52                      piglit_width, piglit_height, 0,
  53                      GL_RGBA, GL_UNSIGNED_BYTE, NULL);
  54
  55         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  56         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  57
  58         glGenFramebuffersEXT(1, &fb);
  59         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
  60         glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
  61                                   GL_COLOR_ATTACHMENT0_EXT,
  62                                   GL_TEXTURE_2D,
  63                                   tex,
  64                                   0);
  65         assert(glGetError() == 0);
  66
  67         status = glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT);
  68         if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
  69                 fprintf(stderr, "fbo incomplete (status = 0x%04x)\n", status);
  70                 piglit_report_result(PIGLIT_SKIP);
  71         }
  72
  73         glClearColor(1.0, 0.0, 0.0, 0.0);
  74         glClear(GL_COLOR_BUFFER_BIT);
  75         glEnable(GL_STENCIL_TEST);
  76         glStencilFunc(GL_NEVER, 0xd0, 0xff);
  77         glColor4fv(green);
  78         piglit_draw_rect(0, 0, piglit_width, piglit_height);
  79
  80         for (y = 0; y < piglit_height; y++) {
  81                 for (x = 0; x < piglit_width; x++) {
  82                         pass = pass && piglit_probe_pixel_rgb(x, y, green);
  83                 }
  84         }
  85
  86         glDisable(GL_STENCIL_TEST);
  87         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
  88         glEnable(GL_TEXTURE_2D);
  89         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
  90         piglit_draw_rect_tex(0, 0, piglit_width, piglit_height,
  91                              0, 0, 1, 1);
  92         glDisable(GL_TEXTURE_2D);
  93
  94         glutSwapBuffers();
  95
  96         return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
  97 }
  98
  99 void
 100 piglit_init(int argc, char **argv)
 101 {
 102         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 103
 104         piglit_require_extension("GL_EXT_framebuffer_object");
 105 }