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/*
* Copyright © 2010 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 quad-invariance.c
*
* Test whether quad rasterization changes when drawing one or more
* than one quad.
*
* This is not strictly required by conformance, but seems to be in
* the spirit of the invariance rules. As a result, failure of this
* test is only a warning.
*/
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.window_width = 128;
config.window_height = 128;
config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
PIGLIT_GL_TEST_CONFIG_END
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
float verts[12][2] = {
/* prim 1: left half of screen. */
{-1.0, -1.0},
{ 0.0, -1.0},
{ 0.0, 1.0},
{-1.0, 1.0},
/* prim 2: right half of screen. */
{ 0.0, -1.0},
{ 1.0, -1.0},
{ 1.0, 1.0},
{ 0.0, 1.0},
/* prim 3: somewhere off the screen. */
{ 2.0, -1.0},
{ 3.0, -1.0},
{ 3.0, 1.0},
{ 2.0, 1.0},
};
float colors[12][4] = {
{1.0, 0.0, 0.0, 0.0},
{0.0, 1.0, 0.0, 0.0},
{0.0, 0.0, 1.0, 0.0},
{1.0, 1.0, 1.0, 0.0},
{1.0, 0.0, 0.0, 0.0},
{0.0, 1.0, 0.0, 0.0},
{0.0, 0.0, 1.0, 0.0},
{1.0, 1.0, 1.0, 0.0},
{1.0, 0.0, 0.0, 0.0},
{0.0, 1.0, 0.0, 0.0},
{0.0, 0.0, 1.0, 0.0},
{1.0, 1.0, 1.0, 0.0},
};
int x, y;
static GLboolean once = GL_TRUE;
glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
glColorPointer(4, GL_FLOAT, 0, colors);
glEnableClientState(GL_COLOR_ARRAY);
glVertexPointer(2, GL_FLOAT, 0, verts);
glEnableClientState(GL_VERTEX_ARRAY);
/* left: 1 prim */
glDrawArrays(GL_QUADS, 0, 4);
/* right: 1 prim */
glDrawArrays(GL_QUADS, 4, 8);
if (once) {
printf("Left and right half should match.\n");
once = GL_FALSE;
}
for (x = 0; x < piglit_width / 2; x++) {
for (y = 0; y < piglit_height; y++) {
float probed[4];
glReadPixels((piglit_width + 1) / 2 + x,
y,
1, 1,
GL_RGBA, GL_FLOAT, &probed);
pass = pass && piglit_probe_pixel_rgb(x, y, probed);
}
}
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_WARN;
}
void
piglit_init(int argc, char *argv[])
{
}
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