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/*
* Copyright © 2016 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 innercoverage.c
*
* Verifies that the inner_coverage layout qualifier works when
* GL_INTEL_conservative_rasterization is enabled.
*/
#include "piglit-util-gl.h"
#include "piglit-matrix.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
#if defined(PIGLIT_USE_OPENGL)
config.supports_gl_core_version = 42;
#elif defined(PIGLIT_USE_OPENGL_ES3)
config.supports_gl_es_version = 31;
#endif
config.window_width = 400;
config.window_height = 400;
config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
PIGLIT_GL_TEST_CONFIG_END
enum piglit_result
piglit_display(void)
{
enum piglit_result result = PIGLIT_PASS;
/* The following fragment programs render the opaque red color
* only when dispatched with a gl_SampleMaskIn empty. It
* should therefore expose the effect of the inner_coverage
* (i.e. no color with this qualifier and a triangle outline
* without it). */
GLuint inner_prog = piglit_build_simple_program(
#if defined(PIGLIT_USE_OPENGL)
"#version 420\n"
#elif defined(PIGLIT_USE_OPENGL_ES3)
"#version 310 es\n"
#endif
"in vec4 piglit_vertex;\n"
"void main()\n"
"{\n"
" gl_Position = piglit_vertex;\n"
"}\n",
#if defined(PIGLIT_USE_OPENGL)
"#version 420\n"
"#extension GL_INTEL_conservative_rasterization: enable\n"
#elif defined(PIGLIT_USE_OPENGL_ES3)
"#version 310 es\n"
"#extension GL_OES_sample_variables: enable\n"
"#extension GL_INTEL_conservative_rasterization: enable\n"
"precision highp float;\n"
#endif
"layout(inner_coverage) in;\n"
"out vec4 color;\n"
"void main()\n"
"{\n"
" float one = 1.0 - float(gl_SampleMaskIn[0]);\n"
" color = vec4(one, 0.0, 0.0, one);\n"
"}\n");
if (!inner_prog)
piglit_report_result(PIGLIT_FAIL);
GLuint conservative_prog = piglit_build_simple_program(
#if defined(PIGLIT_USE_OPENGL)
"#version 420\n"
#elif defined(PIGLIT_USE_OPENGL_ES3)
"#version 310 es\n"
#endif
"in vec4 piglit_vertex;\n"
"void main()\n"
"{\n"
" gl_Position = piglit_vertex;\n"
"}\n",
#if defined(PIGLIT_USE_OPENGL)
"#version 420\n"
"#extension GL_INTEL_conservative_rasterization: enable\n"
#elif defined(PIGLIT_USE_OPENGL_ES3)
"#version 310 es\n"
"#extension GL_OES_sample_variables: enable\n"
"#extension GL_INTEL_conservative_rasterization: enable\n"
"precision highp float;\n"
#endif
"out vec4 color;\n"
"void main()\n"
"{\n"
" float one = 1.0 - float(gl_SampleMaskIn[0]);\n"
" color = vec4(one, 0.0, 0.0, one);\n"
"}\n");
if (!conservative_prog)
piglit_report_result(PIGLIT_FAIL);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo);
glViewport(0, 0, piglit_width, piglit_height);
glClearColor(0.0, 0.0, 0.0, 0.0);
GLuint vao;
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
GLuint vbo;
float delta = 1.01 / piglit_width;
float vertices[3][2] = {
{ -0.5, -1 + delta, },
{ 0, 0.8, },
{ 0.5, -1 + delta, },
};
glGenBuffers(1, &vbo);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(GLfloat), NULL);
glEnableVertexAttribArray(0);
glEnable(GL_CONSERVATIVE_RASTERIZATION_INTEL);
glUseProgram(conservative_prog);
glClear(GL_COLOR_BUFFER_BIT);
glDrawArrays(GL_TRIANGLES, 0, 3);
if(!piglit_check_gl_error(GL_NO_ERROR))
return PIGLIT_FAIL;
piglit_present_results();
const float conservative_expected[] = { 0.0, 0.0, 0.0, 0.0 };
if (!piglit_probe_pixel_rgba(piglit_width / 2, 0, conservative_expected))
result = PIGLIT_FAIL;
glUseProgram(inner_prog);
glClear(GL_COLOR_BUFFER_BIT);
glDrawArrays(GL_TRIANGLES, 0, 3);
if(!piglit_check_gl_error(GL_NO_ERROR))
result = PIGLIT_FAIL;
piglit_present_results();
const float inner_expected[] = { 1.0, 0.0, 0.0, 1.0 };
if (!piglit_probe_pixel_rgba(piglit_width / 2, 0, inner_expected))
result = PIGLIT_FAIL;
return result;
}
void piglit_init(int argc, char **argv)
{
piglit_require_extension("GL_INTEL_conservative_rasterization");
}
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