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/*
* Copyright © 2012 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 getactiveuniformblockname.c
*
* From the GL_ARB_uniform_buffer_object spec:
*
* "An active uniform block's name string can be queried from its
* uniform block index by calling
*
* void GetActiveUniformBlockName(uint program,
* uint uniformBlockIndex,
* sizei bufSize,
* sizei* length,
* char* uniformBlockName);
*
* The string name of the uniform block identified by
* <uniformBlockIndex> is returned into <uniformBlockName>. The
* name is null-terminated. The actual number of characters
* written into <uniformBlockName>, excluding the null
* terminator, is returned in <length>. If <length> is NULL, no
* length is returned.
*
* <bufSize> contains the maximum number of characters (including
* the null terminator) that will be written back to
* <uniformBlockName>.
*
* If an error occurs, nothing will be written to
* <uniformBlockName> or <length>.
*
* ...
*
* The error INVALID_VALUE is generated by GetActiveUniformsiv,
* GetActiveUniformName, GetActiveUniformBlockiv,
* GetActiveUniformBlockName, and UniformBlockBinding if
* <program> is not a value generated by GL.
*
* The error INVALID_VALUE is generated by GetActiveUniformName
* and GetActiveUniformBlockName if <bufSize> is less than zero.
*
* The error INVALID_VALUE is generated by
* GetActiveUniformBlockiv, GetActiveUniformBlockName, and
* UniformBlockBinding if <uniformBlockIndex> is greater than or
* equal to ACTIVE_UNIFORM_BLOCKS."
*/
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.window_width = 10;
config.window_height = 10;
config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_ALPHA;
PIGLIT_GL_TEST_CONFIG_END
void
piglit_init(int argc, char **argv)
{
int i;
GLuint fs, prog;
const char *source =
"#extension GL_ARB_uniform_buffer_object : enable\n"
"uniform a { float u1; };\n"
"uniform bbb { float u2; };\n"
"uniform cc { float u3; };\n"
"void main() {\n"
" gl_FragColor = vec4(u1 + u2 + u3);\n"
"}\n";
int blocks;
bool pass = true;
const char *names[3] = {"a", "bbb", "cc"};
bool found[3] = {false, false, false};
char no_write;
char fill_char = 0xd0;
piglit_require_extension("GL_ARB_uniform_buffer_object");
fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, source);
prog = piglit_link_simple_program(fs, 0);
if (!fs || !prog) {
fprintf(stderr, "Failed to compile shader:\n%s", source);
piglit_report_result(PIGLIT_FAIL);
}
glGetProgramiv(prog, GL_ACTIVE_UNIFORM_BLOCKS, &blocks);
assert(blocks == 3);
for (i = 0; i < blocks; i++) {
GLint written_strlen = 0;
GLint namelen = 9999;
char name[1000];
int name_index;
/* This is the size including null terminator. */
glGetActiveUniformBlockiv(prog, i, GL_UNIFORM_BLOCK_NAME_LENGTH,
&namelen);
memset(name, 0xd0, sizeof(name));
glGetActiveUniformBlockName(prog, i, sizeof(name),
&written_strlen, name);
if (written_strlen >= sizeof(name) - 1) {
fprintf(stderr,
"return strlen %d, longer than the buffer size\n",
written_strlen);
pass = false;
continue;
} else if (name[written_strlen] != 0) {
fprintf(stderr, "return name[%d] was %d, expected 0\n",
written_strlen, name[written_strlen]);
pass = false;
continue;
} else if (strlen(name) != written_strlen) {
fprintf(stderr, "return strlen was %d, but \"%s\" "
"has strlen %d\n", written_strlen, name,
(int)strlen(name));
pass = false;
continue;
}
for (name_index = 0; name_index < ARRAY_SIZE(names); name_index++) {
if (strcmp(names[name_index], name) == 0) {
if (found[name_index]) {
fprintf(stderr,
"Uniform block \"%s\" "
"returned twice.\n", name);
pass = false;
}
found[name_index] = true;
break;
}
}
if (name_index == ARRAY_SIZE(names)) {
fprintf(stderr,
"block \"%s\" is not a known block name\n", name);
pass = false;
continue;
}
if (namelen != written_strlen + 1) {
fprintf(stderr,
"block \"%s\" had "
"GL_UNIFORM_BLOCK_NAME_LENGTH %d, expected %d\n",
name, namelen, written_strlen + 1);
pass = false;
continue;
}
/* Test for overflow by writing to a bufSize equal to
* strlen and checking if a null terminator or
* something landed past that.
*/
memset(name, fill_char, sizeof(name));
glGetActiveUniformBlockName(prog, i, written_strlen,
NULL, name);
if (name[written_strlen] != fill_char) {
fprintf(stderr, "glGetActiveUniformName overflowed: "
"name[%d] = 0x%02x instead of 0x%02x\n",
written_strlen, name[written_strlen],
fill_char);
pass = false;
}
}
no_write = fill_char;
glGetActiveUniformBlockName(0xd0d0, 0, 1, NULL, &no_write);
pass = piglit_check_gl_error(GL_INVALID_VALUE) && pass;
if (no_write != fill_char)
pass = false;
no_write = fill_char;
glGetActiveUniformBlockName(prog, 0, -1, NULL, &no_write);
pass = piglit_check_gl_error(GL_INVALID_VALUE) && pass;
if (no_write != fill_char)
pass = false;
no_write = fill_char;
glGetActiveUniformBlockName(prog, blocks, 1, NULL, &no_write);
pass = piglit_check_gl_error(GL_INVALID_VALUE) && pass;
if (no_write != fill_char)
pass = false;
glDeleteProgram(prog);
glDeleteShader(fs);
piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
}
enum piglit_result piglit_display(void)
{
/* UNREACHED */
return PIGLIT_FAIL;
}
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