tests/glx/glx-swap-pixmap.c

   1 /*
   2  * Copyright 2011 Red Hat, Inc.
   3  * Copyright 2011 Intel Corporation.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  22  * IN THE SOFTWARE.
  23  */
  24
  25 /** @file glx-swap-pixmap.c
  26  *
  27  * Test that glXSwapbuffer() on a pixmap is a noop.
  28  *
  29  * From the GLX 1.4 specification page 34 (page 40 of the PDF):
  30  *
  31  *     This operation is a no-op if draw was created with a
  32  *     non-double-buffered GLXFBConfig, or if draw is a GLXPixmap.
  33  */
  34
  35 #include "piglit-util-gl.h"
  36 #include "piglit-glx-util.h"
  37
  38 int piglit_width = 50, piglit_height = 50;
  39 static Display *dpy;
  40 static XVisualInfo *visinfo;
  41
  42 int
  43 main(int argc, char **argv)
  44 {
  45         Pixmap p;
  46         GLXPixmap g;
  47         static const float green_alpha_zero[4] = {0.0, 1.0, 0.0, 0.0};
  48         static const float green_alpha_one[4] = {0.0, 1.0, 0.0, 1.0};
  49         GLXContext ctx;
  50         bool pass;
  51         GLint alpha_bits;
  52
  53         dpy = XOpenDisplay(NULL);
  54         if (dpy == NULL) {
  55                 fprintf(stderr, "couldn't open display\n");
  56                 piglit_report_result(PIGLIT_FAIL);
  57         }
  58
  59         piglit_glx_get_error(dpy, NULL);
  60         piglit_require_glx_version(dpy, 1, 3);
  61
  62         visinfo = piglit_get_glx_visual(dpy);
  63         p = XCreatePixmap(dpy, DefaultRootWindow(dpy), piglit_width,
  64                           piglit_height, visinfo->depth);
  65
  66         g = glXCreateGLXPixmap(dpy, visinfo, p);
  67
  68         ctx = piglit_get_glx_context(dpy, visinfo);
  69         glXMakeCurrent(dpy, g, ctx);
  70         piglit_dispatch_default_init(PIGLIT_DISPATCH_GL);
  71
  72         /* Clear to green */
  73         glClearColor(0.0, 1.0, 0.0, 0.0);
  74         glClear(GL_COLOR_BUFFER_BIT);
  75
  76         /* Noop */
  77         glXSwapBuffers(dpy, g);
  78
  79         /* We want to actually catch any X error that leaks through as
  80          * a result of glXSwapBuffers() before we go saying "pass" or
  81          * "fail".
  82          */
  83         XSync(dpy, False);
  84
  85         /* If the visual has no alpha, then the GL spec requires that 1.0 be
  86          * read back.  Otherwise, we should read back the 0.0 that we wrote.
  87          */
  88         glGetIntegerv(GL_ALPHA_BITS, &alpha_bits);
  89         if (alpha_bits == 0) {
  90                 pass = piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height,
  91                                               green_alpha_one);
  92         } else {
  93                 pass = piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height,
  94                                               green_alpha_zero);
  95         }
  96
  97         glXDestroyPixmap(dpy, g);
  98
  99         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 100
 101         return 0;
 102 }