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/**
* Copyright © 2013 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.
*/
/**
* Test that when the GS output layout is "points" EndPrimitive() is optional.
*
* From the GLSL 1.50 spec, section 8.10 (Geometry Shader Functions):
*
* "If the output layout is declared to be “points”, calling EndPrimitive()
* is optional."
*/
#include "piglit-util-gl.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 32;
config.supports_gl_core_version = 32;
config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
config.khr_no_error_support = PIGLIT_NO_ERRORS;
PIGLIT_GL_TEST_CONFIG_END
static const char *vstext =
"#version 150\n"
"in vec3 vertex;\n"
"out vec3 pos;\n"
"void main() {\n"
" gl_Position = vec4(vertex, 1.);\n"
" pos = vertex;\n"
"}\n";
static const char *gstext =
"#version 150\n"
"layout(triangles) in;\n"
"layout(points, max_vertices = 3) out;\n"
"in vec3 pos[];\n"
"void main() {\n"
" for(int i = 0; i < 3; i++) {\n"
" gl_Position = vec4(pos[i], 1.);\n"
" EmitVertex();\n"
" }\n"
"}\n";
static const char *fstext =
"#version 150\n"
"out vec4 color;\n"
"void main() {\n"
" color = vec4(0., 1., 0., 1.);\n"
"}\n";
static GLuint vao;
static GLuint vertBuff;
static GLuint indexBuf;
static GLfloat vertices[] = {
-0.9, 0.9, 0.0,
0.9, 0.9, 0.0,
0.9,-0.9, 0.0
};
static GLsizei vertSize = sizeof(vertices);
static GLuint indices[] = {
0, 1, 2
};
static GLsizei indSize = sizeof(indices);
static GLuint prog;
void
piglit_init(int argc, char **argv)
{
GLuint vs = 0, gs = 0, fs = 0;
GLuint vertIndex;
prog = glCreateProgram();
vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vstext);
gs = piglit_compile_shader_text(GL_GEOMETRY_SHADER, gstext);
fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fstext);
glAttachShader(prog, vs);
glAttachShader(prog, gs);
glAttachShader(prog, fs);
glLinkProgram(prog);
if(!piglit_link_check_status(prog)){
glDeleteProgram(prog);
piglit_report_result(PIGLIT_FAIL);
}
glUseProgram(prog);
glGenBuffers(1, &vertBuff);
glBindBuffer(GL_ARRAY_BUFFER, vertBuff);
glBufferData(GL_ARRAY_BUFFER, vertSize, vertices, GL_STATIC_DRAW);
glGenBuffers(1, &indexBuf);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuf);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, indSize,
indices, GL_STATIC_DRAW);
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
vertIndex = glGetAttribLocation(prog, "vertex");
glBindBuffer(GL_ARRAY_BUFFER, vertBuff);
glEnableVertexAttribArray(vertIndex);
glVertexAttribPointer(vertIndex, 3, GL_FLOAT, GL_FALSE, 0, 0);
}
/**
* Probe a 5x5 region of pixels around (x,y) looking for expected color.
*/
static bool
probe_pixel_rgb_neighborhood(int x, int y, const float expected[3])
{
GLfloat pixels[5][5][4]; /* 5x5 pixel block */
int i, j, k;
glReadPixels(x - 2, y - 2, 5, 5, GL_RGBA, GL_FLOAT, pixels);
for (j = 0; j < 5; j++) {
for (i = 0; i < 5; i++) {
float *p = pixels[j][i];
for (k = 0; k < 3; k++) {
if (fabs(p[k] - expected[k])
<= piglit_tolerance[k]) {
/* found matching pixel */
return true;
}
}
}
}
/* pixel not found */
return false;
}
enum piglit_result
piglit_display(void)
{
bool pass = true;
float green[] = {0, 1, 0};
glViewport(0, 0, piglit_width, piglit_height);
glClearColor(0, 0, 0, 1.);
glClear(GL_COLOR_BUFFER_BIT);
glBindVertexArray(vao);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuf);
glDrawElements(GL_TRIANGLES, ARRAY_SIZE(indices),
GL_UNSIGNED_INT, NULL);
pass = probe_pixel_rgb_neighborhood((int) (.05 * piglit_width),
(int) (.95 * piglit_height),
green) && pass;
pass = probe_pixel_rgb_neighborhood((int) (.95 * piglit_width),
(int) (.95 * piglit_height),
green) && pass;
pass = probe_pixel_rgb_neighborhood((int) (.95 * piglit_width),
(int) (.05 * piglit_height),
green) && pass;
pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
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