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/*
* Copyright (C) 2015 Ilia Mirkin
*
* 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 dlist.c
*
* Test that glPolygonOffsetClampEXT works inside of a call list. See
* draw.c for testing technique comments.
*/
#include "piglit-util-gl.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 21;
config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DEPTH | PIGLIT_GL_VISUAL_DOUBLE;
PIGLIT_GL_TEST_CONFIG_END
GLint prog, color;
enum piglit_result
piglit_display(void)
{
static const float blue[4] = {0, 0, 1, 1};
static const float red[4] = {1, 0, 0, 1};
static const float green[4] = {0, 1, 0, 1};
GLuint list;
bool passa = true, passb = true;
glUseProgram(prog);
glViewport(0, 0, piglit_width, piglit_height);
glEnable(GL_DEPTH_TEST);
glEnable(GL_POLYGON_OFFSET_FILL);
glClearColor(0, 0, 1, 1);
glClearDepth(0.5);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
list = glGenLists(2);
/* Draw red rectangle that slopes between 1 and 0.1. Use a
* polygon offset with a high factor but small clamp
*/
glNewList(list, GL_COMPILE_AND_EXECUTE);
glPolygonOffsetClampEXT(-1000, 0, -0.05);
glUniform4fv(color, 1, red);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glEndList();
if (!piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height, blue)) {
printf(" FAIL: red rect peeks over blue rect\n");
passa = false;
}
/* And now set the clamp such that all parts of the polygon
* can pass the depth test.
*/
glNewList(list + 1, GL_COMPILE_AND_EXECUTE);
glPolygonOffsetClampEXT(-1000, 0, -0.51);
glUniform4fv(color, 1, green);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glEndList();
if (!piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height, green)) {
printf(" FAIL: green rect does not cover blue rect\n");
passa = false;
}
piglit_report_subtest_result(passa ? PIGLIT_PASS : PIGLIT_FAIL,
"compile and execute");
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glCallList(list);
if (!piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height, blue)) {
printf(" FAIL: red rect peeks over blue rect\n");
passb = false;
}
glCallList(list + 1);
if (!piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height, green)) {
printf(" FAIL: green rect does not cover blue rect\n");
passb = false;
}
piglit_report_subtest_result(passb ? PIGLIT_PASS : PIGLIT_FAIL,
"call");
piglit_present_results();
return (passa && passb) ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
static const float verts[4][4] = {
/* x y z w */
{ -1, -1, 1.0, 1 },
{ 1, -1, 1.0, 1 },
{ -1, 1, 0.1, 1 },
{ 1, 1, 0.1, 1 }
};
GLuint bo;
piglit_require_extension("GL_EXT_polygon_offset_clamp");
prog = piglit_build_simple_program(
"#version 120\n"
"void main() { gl_Position = gl_Vertex; }\n",
"#version 120\n"
"uniform vec4 color;\n"
"void main() { gl_FragColor = color; }\n");
color = glGetUniformLocation(prog, "color");
glEnableVertexAttribArray(0);
glGenBuffers(1, &bo);
glBindBuffer(GL_ARRAY_BUFFER, bo);
glBufferData(GL_ARRAY_BUFFER, sizeof(verts), verts, GL_STATIC_DRAW);
glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 0, (GLvoid const *)0);
}
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