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/*
* (C) Copyright IBM Corporation 2004
* All Rights Reserved.
*
* 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
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* VA LINUX SYSTEM, IBM AND/OR THEIR SUPPLIERS 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.
*/
/**
* \file stencil_twoside.c
*
* Simple test of GL_ATI_separate_stencil (or the OGL 2.0 equivalent)
* functionality.
*
* Five squares (or six if stencil wrap is available) are drawn
* with different stencil modes, but all should be rendered with the same
* final color.
*/
#include "piglit-util-gl-common.h"
static int use20syntax = 1;
PIGLIT_GL_TEST_CONFIG_BEGIN
config.window_width = 650;
config.window_height = 200;
config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_DEPTH | PIGLIT_GL_VISUAL_STENCIL;
PIGLIT_GL_TEST_CONFIG_END
static const GLfloat Near = 5.0, Far = 25.0;
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
GLint max_stencil;
GLint stencil_bits;
unsigned i;
float expected[4] = {0.5, 0.5, 0.5, 0.5};
int w = piglit_width / (6 * 2 + 1);
int h = w;
int start_y = (piglit_height - h) / 2;
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
glGetIntegerv(GL_STENCIL_BITS, & stencil_bits);
max_stencil = (1U << stencil_bits) - 1;
printf("Stencil bits = %u, maximum stencil value = 0x%08x\n",
stencil_bits, max_stencil);
glClearStencil(1);
glClearColor(0.2, 0.2, 0.8, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT
| GL_STENCIL_BUFFER_BIT);
/* This is the "reference" square. */
glDisable(GL_STENCIL_TEST);
glColor3f(0.5, 0.5, 0.5);
piglit_draw_rect(w * 1, start_y, w, h);
glEnable(GL_STENCIL_TEST);
/* Draw the first two squares using incr for the affected face
*/
/* 2nd square */
if (use20syntax) {
glStencilFuncSeparate(GL_FRONT, GL_ALWAYS, 0, ~0);
glStencilFuncSeparate(GL_BACK, GL_ALWAYS, 0, ~0);
glStencilOpSeparate(GL_FRONT, GL_KEEP, GL_KEEP, GL_INCR);
glStencilOpSeparate(GL_BACK, GL_KEEP, GL_KEEP, GL_DECR);
}
else {
glStencilFuncSeparateATI(GL_ALWAYS, GL_ALWAYS, 0, ~0);
glStencilOpSeparateATI(GL_FRONT, GL_KEEP, GL_KEEP, GL_INCR);
glStencilOpSeparateATI(GL_BACK, GL_KEEP, GL_KEEP, GL_DECR);
}
glColor3f(0.9, 0.9, 0.9);
for (i = 0 ; i < (max_stencil + 5) ; i++) {
/* this should be front facing */
piglit_draw_rect(w * 3, start_y, w, h);
}
/* stencil vals should be equal to max_stencil */
glStencilFunc(GL_EQUAL, max_stencil, ~0);
glColor3f(0.5, 0.5, 0.5);
piglit_draw_rect(w * 3, start_y, w, h);
/* 3rd square */
if (use20syntax) {
glStencilFuncSeparate(GL_FRONT, GL_ALWAYS, 0, ~0);
glStencilFuncSeparate(GL_BACK, GL_ALWAYS, 0, ~0);
glStencilOpSeparate(GL_FRONT, GL_KEEP, GL_KEEP, GL_DECR);
glStencilOpSeparate(GL_BACK, GL_KEEP, GL_KEEP, GL_INCR);
}
else {
glStencilFuncSeparateATI(GL_ALWAYS, GL_ALWAYS, 0, ~0);
glStencilOpSeparateATI(GL_FRONT, GL_KEEP, GL_KEEP, GL_DECR);
glStencilOpSeparateATI(GL_BACK, GL_KEEP, GL_KEEP, GL_INCR);
}
glColor3f(0.9, 0.9, 0.9);
for (i = 0 ; i < (max_stencil + 5) ; i++) {
/* this should be back facing */
piglit_draw_rect(w * 5, start_y + h, w, -h);
}
/* stencil vals should be equal to max_stencil */
glStencilFunc(GL_EQUAL, max_stencil, ~0);
glColor3f(0.5, 0.5, 0.5);
piglit_draw_rect(w * 5, start_y, w, h);
/* 4th square */
if (use20syntax) {
glStencilFuncSeparate(GL_FRONT, GL_NEVER, 0, ~0);
glStencilFuncSeparate(GL_BACK, GL_ALWAYS, 0, ~0);
glStencilOpSeparate(GL_FRONT, GL_KEEP, GL_KEEP, GL_DECR);
glStencilOpSeparate(GL_BACK, GL_KEEP, GL_KEEP, GL_INCR);
}
else {
glStencilFuncSeparateATI(GL_NEVER, GL_ALWAYS, 0, ~0);
glStencilOpSeparateATI(GL_FRONT, GL_KEEP, GL_KEEP, GL_DECR);
glStencilOpSeparateATI(GL_BACK, GL_KEEP, GL_KEEP, GL_INCR);
}
glColor3f(0.9, 0.9, 0.9);
for (i = 0 ; i < (max_stencil + 5) ; i++) {
/* this should be back facing */
piglit_draw_rect(w * 7, start_y + h, w, -h);
/* this should be front facing */
piglit_draw_rect(w * 7, start_y, w, h);
}
/* stencil vals should be equal to max_stencil */
glStencilFunc(GL_EQUAL, max_stencil, ~0);
glColor3f(0.5, 0.5, 0.5);
piglit_draw_rect(w * 7, start_y, w, h);
/* 5th square */
if (use20syntax) {
glStencilFuncSeparate(GL_FRONT, GL_ALWAYS, 0, ~0);
glStencilFuncSeparate(GL_BACK, GL_ALWAYS, 0, ~0);
glStencilOpSeparate(GL_FRONT, GL_KEEP, GL_KEEP, GL_INCR);
glStencilOpSeparate(GL_BACK, GL_KEEP, GL_KEEP, GL_DECR);
}
else {
glStencilFuncSeparateATI(GL_ALWAYS, GL_ALWAYS, 0, ~0);
glStencilOpSeparateATI(GL_FRONT, GL_KEEP, GL_KEEP, GL_INCR);
glStencilOpSeparateATI(GL_BACK, GL_KEEP, GL_KEEP, GL_DECR);
}
glColor3f(0.9, 0.9, 0.9);
for (i = 0 ; i < (max_stencil + 5) ; i++) {
/* this should be back facing */
piglit_draw_rect(w * 9, start_y + h, w, -h);
/* this should be front facing */
piglit_draw_rect(w * 9, start_y, w, h);
}
glStencilFunc(GL_EQUAL, 1, ~0);
glColor3f(0.5, 0.5, 0.5);
piglit_draw_rect(w * 9, start_y, w, h);
/* 6th square */
if (piglit_is_extension_supported("GL_EXT_stencil_wrap")) {
if (use20syntax) {
glStencilFuncSeparate(GL_FRONT, GL_ALWAYS, 0, ~0);
glStencilFuncSeparate(GL_BACK, GL_ALWAYS, 0, ~0);
glStencilOpSeparate(GL_FRONT, GL_KEEP, GL_KEEP, GL_KEEP);
glStencilOpSeparate(GL_BACK, GL_KEEP, GL_KEEP, GL_INCR_WRAP);
}
else {
glStencilFuncSeparateATI(GL_ALWAYS, GL_ALWAYS, 0, ~0);
glStencilOpSeparateATI(GL_FRONT, GL_KEEP, GL_KEEP, GL_KEEP);
glStencilOpSeparateATI(GL_BACK, GL_KEEP, GL_KEEP, GL_INCR_WRAP);
}
glColor3f(0.9, 0.9, 0.9);
for (i = 0 ; i < (max_stencil + 5) ; i++) {
/* this should be back facing */
piglit_draw_rect(w * 11, start_y + h, w, -h);
/* this should be front facing */
piglit_draw_rect(w * 11, start_y, w, h);
}
glStencilFunc(GL_EQUAL, 260 - 255, ~0);
glColor3f(0.5, 0.5, 0.5);
piglit_draw_rect(w * 11, start_y, w, h);
}
pass = piglit_probe_pixel_rgb(w * 1.5, piglit_height / 2, expected);
pass = piglit_probe_pixel_rgb(w * 3.5, piglit_height / 2, expected);
pass = piglit_probe_pixel_rgb(w * 5.5, piglit_height / 2, expected);
pass = piglit_probe_pixel_rgb(w * 7.5, piglit_height / 2, expected);
pass = piglit_probe_pixel_rgb(w * 9.5, piglit_height / 2, expected);
pass = piglit_probe_pixel_rgb(w * 11.5, piglit_height / 2, expected);
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
if (!piglit_is_extension_supported("GL_ATI_separate_stencil") && piglit_get_gl_version() < 20) {
printf("Sorry, this program requires either "
"GL_ATI_separate_stencil or OpenGL 2.0.\n");
piglit_report_result(PIGLIT_SKIP);
}
if (piglit_get_gl_version() < 20) {
use20syntax = 0;
}
printf("\nAll 5 (or 6) squares should be the same color.\n");
}
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