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/*
* Copyright © 2018 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.
*
*/
/** @file depth-clamp-range.c
*
* Tests that AMD_depth_clamp_separate enablement didn't break DepthRange
* functionality, and properly uses the min/max selection.
*/
#include "piglit-util-gl.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_core_version = 32;
config.supports_gl_compat_version = 32;
config.khr_no_error_support = PIGLIT_NO_ERRORS;
config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE
| PIGLIT_GL_VISUAL_DEPTH;
PIGLIT_GL_TEST_CONFIG_END
static GLuint program;
static GLint projection_loc;
static GLuint
make_program(void)
{
static const char *vs_text =
"#version 330 \n"
"in vec4 vertex; \n"
"uniform mat4 projection; \n"
"void main() \n"
"{ \n"
" gl_Position = projection * vertex; \n"
"} \n";
static const char *fs_text =
"#version 330 \n"
"void main() \n"
"{ \n"
" gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0); \n"
"} \n";
GLuint program = piglit_build_simple_program(vs_text, fs_text);
return program;
}
void
piglit_init(int argc, char **argv)
{
piglit_require_extension("GL_AMD_depth_clamp_separate");
program = make_program();
}
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
float white[3] = {1.0, 1.0, 1.0};
float clear[3] = {0.0, 0.0, 0.0};
glClearDepth(0.5);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glUseProgram(program);
projection_loc = glGetUniformLocation(program, "projection");
piglit_ortho_uniform(projection_loc, piglit_width, piglit_height);
/* Keep in mind that the ortho projection flips near and far's signs,
* so 1.0 to quad()'s z maps to glDepthRange's near, and -1.0 maps to
* glDepthRange's far.
*/
/* Basic glDepthRange testing. */
glDisable(GL_DEPTH_CLAMP_NEAR_AMD);
glDisable(GL_DEPTH_CLAMP_FAR_AMD);
glDepthRange(0, 1);
piglit_draw_rect_z(0.5, 10, 10, 10, 10); /* .25 - drawn. */
glDepthRange(1, 0);
piglit_draw_rect_z(0.5, 10, 30, 10, 10); /* 0.75 - not drawn. */
/* Now, test that near depth clamping works.*/
glEnable(GL_DEPTH_CLAMP_NEAR_AMD);
glDepthRange(0.25, 1.0);
piglit_draw_rect_z(4, 30, 10, 10, 10); /* .25 - drawn. */
glDisable(GL_DEPTH_CLAMP_NEAR_AMD);
glEnable(GL_DEPTH_CLAMP_FAR_AMD);
glDepthRange(0.75, 1.0);
piglit_draw_rect_z(4, 30, 30, 10, 10); /* 0.75 - not drawn. */
/* Test that far clamping works.*/
glDepthRange(0.0, 0.25);
piglit_draw_rect_z(-4, 50, 10, 10, 10); /* .25 - drawn. */
glDepthRange(0.0, 0.75);
piglit_draw_rect_z(-4, 50, 30, 10, 10); /* 0.75 - not drawn. */
/* Now, flip near and far around and make sure that it's doing the
* min/max of near and far in the clamping.
*/
/* Test that near (max) clamping works. */
glEnable(GL_DEPTH_CLAMP_NEAR_AMD);
glDepthRange(0.25, 0.0);
piglit_draw_rect_z(4, 70, 10, 10, 10); /* .25 - drawn. */
glDisable(GL_DEPTH_CLAMP_NEAR_AMD);
glEnable(GL_DEPTH_CLAMP_FAR_AMD);
glDepthRange(0.75, 0.0);
piglit_draw_rect_z(4, 70, 30, 10, 10); /* 0.75 - not drawn. */
/* Now, test far (min) clamping works. */
glDepthRange(1.0, 0.0);
piglit_draw_rect_z(-4, 90, 10, 10, 10); /* 0.0 - drawn. */
glDisable(GL_DEPTH_CLAMP_FAR_AMD);
glDepthRange(1.0, 0.75);
piglit_draw_rect_z(-4, 90, 30, 10, 10); /* 0.75 - drawn. */
pass = piglit_probe_pixel_rgb(15, 15, white) && pass;
pass = piglit_probe_pixel_rgb(15, 35, clear) && pass;
pass = piglit_probe_pixel_rgb(35, 15, white) && pass;
pass = piglit_probe_pixel_rgb(35, 35, clear) && pass;
pass = piglit_probe_pixel_rgb(55, 15, white) && pass;
pass = piglit_probe_pixel_rgb(55, 35, clear) && pass;
pass = piglit_probe_pixel_rgb(75, 15, white) && pass;
pass = piglit_probe_pixel_rgb(75, 35, clear) && pass;
pass = piglit_probe_pixel_rgb(95, 15, white) && pass;
pass = piglit_probe_pixel_rgb(95, 35, clear) && pass;
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
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