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/*
* Copyright © 2009 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 scissor-stencil-clear.c
*
* Tests that glScissor properly affects glClear of the stencil buffer.
*/
#include "piglit-util.h"
int piglit_width = 100, piglit_height = 100;
int piglit_window_mode = GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH | GLUT_STENCIL;
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
static float red[] = {1.0, 0.0, 0.0, 0.0};
static float green[] = {0.0, 1.0, 0.0, 0.0};
static float blue[] = {0.0, 0.0, 1.0, 0.0};
/* whole window gray -- none should be visible */
glClearColor(0.5, 0.5, 0.5, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
/* Clear stencil to 0, which will be drawn green */
glClearStencil(0);
glClear(GL_STENCIL_BUFFER_BIT);
/* quad at 10, 10 that will be drawn blue. */
glEnable(GL_SCISSOR_TEST);
glScissor(10, 10, 10, 10);
glClearStencil(1);
glClear(GL_STENCIL_BUFFER_BIT);
/* 0-sized quad at 10, 30 that shouldn't be drawn (red) */
glScissor(10, 30, 0, 0);
glClearStencil(2);
glClear(GL_STENCIL_BUFFER_BIT);
glDisable(GL_SCISSOR_TEST);
glEnable(GL_STENCIL_TEST);
glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
/* First quad -- stencil == 0 gets green */
glStencilFunc(GL_EQUAL, 0, ~0);
glColor4fv(green);
piglit_draw_rect(0, 0, piglit_width, piglit_height);
/* Second quad -- stencil == 1 gets blue */
glStencilFunc(GL_EQUAL, 1, ~0);
glColor4fv(blue);
piglit_draw_rect(0, 0, piglit_width, piglit_height);
/* Last quad -- stencil == 2 gets red (shouldn't occur!) */
glStencilFunc(GL_EQUAL, 2, ~0);
glColor4fv(red);
piglit_draw_rect(0, 0, piglit_width, piglit_height);
pass &= piglit_probe_rect_rgb(0, 0, piglit_width, 10, green);
pass &= piglit_probe_rect_rgb(0, 10, 10, 10, green);
pass &= piglit_probe_rect_rgb(10, 10, 10, 10, blue);
pass &= piglit_probe_rect_rgb(20, 10, piglit_width-20, 10, green);
pass &= piglit_probe_rect_rgb(0, 20, piglit_width, piglit_height - 20,
green);
glutSwapBuffers();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
static void reshape(int width, int height)
{
piglit_width = width;
piglit_height = height;
piglit_ortho_projection(width, height, GL_FALSE);
}
void
piglit_init(int argc, char **argv)
{
reshape(piglit_width, piglit_height);
}
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