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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.
*/
/**
* From the GLSL 3.2 spec, section 2.12.1 (Geometry Shader Input Primitives):
*
* "If a geometry shader is active, any command that transfers vertices to the
* GL will generate an INVALID_OPERATION error if the primitive mode parameter
* is incompatible with the input primitive type of the currently active
* program object, as discussed below."
*
* "Geometry shaders that operate on points are valid only for the POINTS
* primitive type."
* "Geometry shaders that operate on line segments are valid only for the LINES,
* LINE_STRIP, and LINE_LOOP primitive types."
* "Geometry shaders that operate on line segments with adjacent vertices are
* valid only for the LINES_ADJACENCY and LINE_STRIP_ADJACENCY primitive
* types."
* "Geometry shaders that operate on triangles are valid for the TRIANGLES,
* TRIANGLE_STRIP and TRIANGLE_FAN primitive types."
* "Geometry shaders that operate on triangles with adjacent vertices are valid
* for the TRIANGLES_ADJACENCY and TRIANGLE_STRIP_ADJACENCY primitive types."
*/
#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;
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 *gstemplate =
"#version 150\n"
"#define LAYOUT_TYPE %s\n"
"layout(LAYOUT_TYPE) in;\n"
"layout(triangle_strip, max_vertices = 3) out;\n"
"in vec3 pos[];\n"
"void main() {\n"
" for(int i = 0; i < pos.length(); 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(1.);\n"
"}\n";
static GLuint vao;
static GLuint vertBuff;
static GLuint indexBuf;
static GLfloat vertices[] = {
-1.0, 1.0, 0.0,
1.0, 1.0, 0.0,
1.0,-1.0, 0.0,
-1.0,-1.0, 0.0
};
static GLsizei vertSize = sizeof(vertices);
static GLuint indices[] = {
0, 1, 2, 0, 2, 3
};
static GLsizei indSize = sizeof(indices);
static GLuint prog;
static const struct test_set
{
GLenum prim_type;
const char *layout_type;
} tests[] = {
{GL_POINTS, "points"},
{GL_LINES, "lines"},
{GL_LINE_STRIP, "lines"},
{GL_LINE_LOOP, "lines"},
{GL_LINES_ADJACENCY, "lines_adjacency"},
{GL_LINE_STRIP_ADJACENCY, "lines_adjacency"},
{GL_TRIANGLES, "triangles"},
{GL_TRIANGLE_STRIP, "triangles"},
{GL_TRIANGLE_FAN, "triangles"},
{GL_TRIANGLES_ADJACENCY, "triangles_adjacency"},
{GL_TRIANGLE_STRIP_ADJACENCY, "triangles_adjacency"}
};
const char* layout;
void
piglit_init(int argc, char **argv)
{
GLuint vs = 0, gs = 0, fs = 0;
char* gstext = NULL;
GLuint vertIndex;
/* Parse params */
if (argc != 2) {
printf("%s failed\n", argv[0]);
piglit_report_result(PIGLIT_FAIL);
}
layout = argv[1];
if (layout == NULL) {
printf("%s failed\n", argv[0]);
piglit_report_result(PIGLIT_FAIL);
}
prog = glCreateProgram();
vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vstext);
(void)!asprintf(&gstext, gstemplate, layout);
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);
free(gstext);
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);
}
enum piglit_result
piglit_display(void)
{
bool pass = true;
int i = 0;
glClearColor(0.2, 0.2, 0.2, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
glBindVertexArray(vao);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, indexBuf);
for(i = 0; i < ARRAY_SIZE(tests); i++) {
glDrawElements(tests[i].prim_type, ARRAY_SIZE(indices),
GL_UNSIGNED_INT, NULL);
if(strcmp(layout, tests[i].layout_type) == 0)
pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
else
pass = piglit_check_gl_error(GL_INVALID_OPERATION) & pass;
}
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
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