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/*
* Copyright © 2011 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Authors:
* Eric Anholt <eric@anholt.net>
*
*/
/**
* @file glx-visuals-stencil.c
*
* Tests that when a stencil buffer is reported as present in the GLX
* visual that it behaves appropriately (can set a value in it with
* drawing, and use the stencil test on that value), and that when a
* stencil buffer is not present the stencil test always passes even
* if we try to enable it.
*/
#include "piglit-util-gl-common.h"
#include "piglit-glx-util.h"
int piglit_width = 20;
int piglit_height = 20;
enum piglit_result
draw(Display *dpy, GLXFBConfig config)
{
int sbits;
float green[3] = {0.0, 1.0, 0.0};
float blue[3] = {0.0, 0.0, 1.0};
float *left, *right;
bool pass = true;
piglit_dispatch_default_init();
glXGetFBConfigAttrib(dpy, config, GLX_STENCIL_SIZE, &sbits);
piglit_ortho_projection(piglit_width, piglit_height, false);
glEnable(GL_STENCIL_TEST);
/* Set half the FB to stencil value 0, half to 1, and everything blue */
glColor3fv(blue);
glStencilFunc(GL_ALWAYS, 0, ~0);
glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
piglit_draw_rect(0, 0,
piglit_width / 2, piglit_height);
glStencilFunc(GL_ALWAYS, 1, ~0);
piglit_draw_rect(piglit_width / 2, 0,
piglit_width, piglit_height);
/* Now draw a rect trying to set just the 1 values to green. */
glColor3fv(green);
glStencilFunc(GL_EQUAL, 1, ~0);
glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
piglit_draw_rect(0, 0, piglit_width, piglit_height);
/* If there was a stencil buffer, then we get half the window
* set to green. Otherwise, the stencil test always passes
* and the whole thing should have been set green.
*/
if (sbits) {
left = blue;
right = green;
} else {
left = green;
right = green;
}
pass = pass && piglit_probe_rect_rgb(0, 0,
piglit_width / 2, piglit_height,
left);
pass = pass && piglit_probe_rect_rgb(piglit_width / 2, 0,
piglit_width - piglit_width / 2,
piglit_height,
right);
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
int
main(int argc, char **argv)
{
enum piglit_result result;
if (argc > 1 && strcmp(argv[1], "-pixmap") == 0)
result = piglit_glx_iterate_pixmap_fbconfigs(draw);
else
result = piglit_glx_iterate_visuals(draw);
piglit_report_result(result);
return 0; /* UNREACHED */
}
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