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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.
*/
#include "piglit-util-gl-common.h"
/**
* @file clear.c
*
* Tests that conditional rendering appropriately affects glClear().
*
* From the NV_conditional_render spec:
*
* "If the result (SAMPLES_PASSED) of the query is zero, all
* rendering commands between BeginConditionalRenderNV and the
* corresponding EndConditionalRenderNV are discarded. In this
* case, Begin, End, all vertex array commands performing an
* implicit Begin and End, DrawPixels (section 3.6), Bitmap
* (section 3.7), Clear (section 4.2.3), Accum (section 4.2.4),
* CopyPixels (section 4.3.3), EvalMesh1, and EvalMesh2 (section
* 5.1) have no effect."
*/
PIGLIT_GL_TEST_MAIN(
32 /*window_width*/,
32 /*window_height*/,
GLUT_DOUBLE | GLUT_RGB | GLUT_ALPHA)
enum piglit_result
piglit_display(void)
{
bool pass = true;
float green[4] = {0.0, 1.0, 0.0, 0.0};
GLuint q;
glClearColor(0.5, 0.5, 0.5, 0.5);
glClear(GL_COLOR_BUFFER_BIT);
glGenQueries(1, &q);
/* Generate query pass: draw top half of screen. */
glColor4f(0.0, 1.0, 0.0, 0.0);
glBeginQuery(GL_SAMPLES_PASSED, q);
piglit_draw_rect(-1, 0, 2, 1);
glEndQuery(GL_SAMPLES_PASSED);
/* Conditional render that should draw bottom half of screen. */
glBeginConditionalRenderNV(q, GL_QUERY_WAIT_NV);
glClearColor(0.0, 1.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
glEndConditionalRenderNV();
/* Generate query fail */
glBeginQuery(GL_SAMPLES_PASSED, q);
glEndQuery(GL_SAMPLES_PASSED);
/* Conditional render that should not draw full screen. */
glBeginConditionalRenderNV(q, GL_QUERY_WAIT_NV);
glClearColor(1.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
glEndConditionalRenderNV();
pass = piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height,
green);
piglit_present_results();
glDeleteQueries(1, &q);
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
if (piglit_get_gl_version() < 20) {
printf("Requires OpenGL 2.0\n");
piglit_report_result(PIGLIT_SKIP);
}
piglit_require_extension("GL_NV_conditional_render");
}
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