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/*
* Copyright (c) 2014 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 ignore-centroid-qualifier.cpp
*
* Tests that all 'in' variables in fragment shader are interpolated at sample
* positions when using per sample shading. Ignore the 'centroid' qualifier if
* used with 'in' variable.
*
*/
#include "piglit-util-gl.h"
#include "piglit-fbo.h"
using namespace piglit_util_fbo;
const int pattern_width = 128; const int pattern_height = 128;
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 21;
config.supports_gl_core_version = 31;
config.window_width = 2 * pattern_width;
config.window_height = pattern_height;
config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
config.khr_no_error_support = PIGLIT_NO_ERRORS;
PIGLIT_GL_TEST_CONFIG_END
static Fbo multisampled_fbo;
static int sample_pos_loc, sample_id_loc, num_samples;
static int draw_prog_left, draw_prog_right, test_prog;
enum piglit_result
piglit_display(void)
{
float pos[2];
bool result = true, pass = true;
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, multisampled_fbo.handle);
glClear(GL_COLOR_BUFFER_BIT);
/* Draw test image in to left half of multisample fbo*/
glUseProgram(draw_prog_left);
glViewport(0, 0, pattern_width, pattern_height);
glEnable(GL_SAMPLE_SHADING);
glMinSampleShading(1.0);
piglit_draw_rect(-1, -1, 2, 2);
glDisable(GL_SAMPLE_SHADING);
for(int i = 0; i < num_samples; i++) {
/* Draw reference image in to right half of multisample fbo */
glUseProgram(draw_prog_right);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, multisampled_fbo.handle);
glGetMultisamplefv(GL_SAMPLE_POSITION, i, pos);
glUniform2fv(sample_pos_loc, 1, pos);
glEnable(GL_SCISSOR_TEST);
glScissor(pattern_width, 0, pattern_width, pattern_height);
glViewport(pattern_width, 0, pattern_width, pattern_height);
glClear(GL_COLOR_BUFFER_BIT);
piglit_draw_rect(-1, -1, 2, 2);
glDisable(GL_SCISSOR_TEST);
/* Draw sample color from multisample texture in to winsys fbo */
glUseProgram(test_prog);
glUniform1i(sample_id_loc, i);
glViewport(0, 0, 2 * pattern_width, pattern_height);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo);
glClear(GL_COLOR_BUFFER_BIT);
piglit_draw_rect(-1, -1, 2, 2);
result = piglit_probe_rect_halves_equal_rgba(0, 0,
piglit_width,
piglit_height);
pass = pass && result;
printf("sample_id = %d, result = %s\n", i,
result ? "pass" : "fail");
}
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
static void
print_usage_and_exit(char *prog_name)
{
printf("Usage: %s <num_samples>\n", prog_name);
piglit_report_result(PIGLIT_FAIL);
}
void
piglit_init(int argc, char**argv)
{
if (argc != 2)
print_usage_and_exit(argv[0]);
/* 1st arg: num_samples */
char *endptr = NULL;
num_samples = strtol(argv[1], &endptr, 0);
if (endptr != argv[1] + strlen(argv[1]))
print_usage_and_exit(argv[0]);
piglit_require_extension("GL_ARB_texture_multisample");
piglit_require_extension("GL_ARB_sample_shading");
piglit_require_GLSL_version(130);
/* Skip the test if num_samples > GL_MAX_SAMPLES */
GLint max_samples;
glGetIntegerv(GL_MAX_SAMPLES, &max_samples);
if (num_samples == 0 || num_samples > max_samples)
piglit_report_result(PIGLIT_SKIP);
FboConfig msConfig(num_samples, piglit_width, piglit_height);
msConfig.num_rb_attachments = 0;
msConfig.num_tex_attachments = 1;
multisampled_fbo.setup(msConfig);
/* Reduced tolerence for stricter color matching */
piglit_set_tolerance_for_bits(16, 16, 16, 16);
draw_prog_left = piglit_build_simple_program(
"#version 130\n"
"#extension GL_ARB_sample_shading: require\n"
"in vec4 piglit_vertex;\n"
"centroid out vec2 test;\n"
"void main() {\n"
" gl_Position = piglit_vertex;\n"
" test = piglit_vertex.xy;\n"
"}\n",
"#version 130\n"
"#extension GL_ARB_sample_shading: require\n"
"centroid in vec2 test;\n"
"out vec4 fragcolor;\n"
"void main() {\n"
" fragcolor = vec4(abs(test), 0, 1);\n"
"}\n");
draw_prog_right = piglit_build_simple_program(
"#version 130\n"
"uniform vec2 sample_pos;\n"
"in vec4 piglit_vertex;\n"
"out vec2 ref;\n"
"void main() {\n"
" gl_Position = piglit_vertex;\n"
" ref = piglit_vertex.xy;\n"
/* Add an offset to account for interplolation at
* sample position. pattern_width == pattern_height
* == 128, so the scaling factor between normalized
* device coordinates and pixels is 128/2 == 64.
*/
" ref += (sample_pos - 0.5) / 64;\n"
"}\n",
"#version 130\n"
"in vec2 ref;\n"
"out vec4 fragcolor;\n"
"void main() {\n"
" fragcolor = vec4(abs(ref), 0, 1);\n"
"}\n");
sample_pos_loc = glGetUniformLocation(draw_prog_right, "sample_pos");
test_prog = piglit_build_simple_program(
"#version 130\n"
"in vec4 piglit_vertex;\n"
"void main() {\n"
" gl_Position = piglit_vertex;\n"
"}\n",
"#version 130\n"
"#extension GL_ARB_texture_multisample: require\n"
"uniform int sample_id;\n"
"uniform sampler2DMS tex;\n"
"out vec4 fragcolor;\n"
"void main() {\n"
" fragcolor = texelFetch(tex, ivec2(gl_FragCoord.xy),\n"
" sample_id);\n"
"}\n");
glUseProgram(test_prog);
glUniform1i(glGetUniformLocation(test_prog, "tex"), 0);
sample_id_loc = glGetUniformLocation(test_prog, "sample_id");
}
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