tests/security/initialized-fbo.c

   1 /*
   2  * Copyright © 2012 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  * Test that FBO memory is initialized to a constant color and not stale
  26  * data that may show old contents of VRAM.
  27  *
  28  * To pass this test an OpenGL implementation should initialize the
  29  * contents of the new buffer to some fixed value (like all zeros).
  30  * But since that's not spec'd by OpenGL, we only return WARN instead of
  31  * FAIL if that's not the case.
  32  *
  33  * Brian Paul
  34  * June 2012
  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_width = 512;
  44         config.window_height = 512;
  45         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  46
  47 PIGLIT_GL_TEST_CONFIG_END
  48
  49
  50 static GLuint fbo, rb;
  51
  52
  53 enum piglit_result
  54 piglit_display(void)
  55 {
  56         GLfloat firstPixel[4];
  57         bool pass = true;
  58
  59         /* read from fbo, draw to window */
  60         glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo);
  61         glReadBuffer(GL_COLOR_ATTACHMENT0);
  62         glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo);
  63         glDrawBuffer(GL_BACK);
  64
  65         /* init color buffer to red */
  66         glClearColor(1, 0, 0, 1);
  67         glClear(GL_COLOR_BUFFER_BIT);
  68
  69         /* copy (undefined) fbo image to window */
  70         glWindowPos2i(0, 0);
  71         glCopyPixels(0, 0, piglit_width, piglit_height, GL_COLOR);
  72
  73         glBindFramebuffer(GL_READ_FRAMEBUFFER, piglit_winsys_fbo);
  74         glReadBuffer(GL_BACK);
  75
  76         glReadPixels(0, 0, 1, 1, GL_RGBA, GL_FLOAT, firstPixel);
  77         pass = piglit_probe_rect_rgb(0, 0, piglit_width, piglit_height,
  78                                      firstPixel);
  79
  80         piglit_present_results();
  81
  82         return pass ? PIGLIT_PASS : PIGLIT_WARN;
  83 }
  84
  85
  86 void
  87 piglit_init(int argc, char **argv)
  88 {
  89         piglit_require_extension("GL_ARB_framebuffer_object");
  90
  91         glGenFramebuffers(1, &fbo);
  92         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
  93         glGenRenderbuffers(1, &rb);
  94         glBindRenderbuffer(GL_RENDERBUFFER, rb);
  95         glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA,
  96                               piglit_width, piglit_height);
  97         glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
  98                                   GL_RENDERBUFFER, rb);
  99
 100         if (!piglit_check_gl_error(GL_NO_ERROR)) {
 101                 printf("fbo creation error\n");
 102                 piglit_report_result(PIGLIT_FAIL);
 103                 return;
 104         }
 105
 106         if (glCheckFramebufferStatus(GL_FRAMEBUFFER) !=
 107             GL_FRAMEBUFFER_COMPLETE) {
 108                 printf("fbo incomplete\n");
 109                 piglit_report_result(PIGLIT_FAIL);
 110                 return;
 111         }
 112
 113         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 114         glViewport(0, 0, piglit_width, piglit_height);
 115 }