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/*
* Copyright (c) 2009 Nicolai Hähnle
*
* 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.
*
* Authors:
* Nicolai Hähnle <nhaehnle@gmail.com>
*
*/
/**
* \file
* Test certain type of very long fragment programs.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "piglit-util.h"
#include "piglit-framework.h"
PIGLIT_GL_TEST_MAIN(
32 /*window_width*/,
32 /*window_height*/,
GLUT_RGBA | GLUT_ALPHA)
int max_alu_instructions;
static const char program_Head[] =
"!!ARBfp1.0\n"
"TEMP r;\n"
"MOV r, 0;\n"
;
static const char program_Step[] = "ADD %s, r.wxyz, { %f, %f, %f, %f };\n";
static const char program_Tail[] =
"END\n";
static const char program_Output[] = "result.color";
static void step_add(unsigned int i, float * add)
{
unsigned int rotate = i % 4;
add[(0 + rotate) % 4] = ((i+1) % 16) ? 0.0625 : -1.0+0.0625;
add[(1 + rotate) % 4] = ((i+1) % 16) ? 0.0 : (((i+1) % 256) ? 0.0625 : -1.0+0.0625);
add[(2 + rotate) % 4] = ((i+1) % 256) ? 0.0 : (((i+1) % 4096) ? 0.0625 : -1.0+0.0625);
add[(3 + rotate) % 4] = ((i+1) % 4096) ? 0.0 : 0.0625;
}
static enum piglit_result test(unsigned int alu_depth)
{
char * program_text = malloc(sizeof(program_Head) +
2*alu_depth*sizeof(program_Step) +
sizeof(program_Tail) +
sizeof(program_Output));
char * buildp;
char buf[128];
GLuint program_object;
unsigned int i;
float expected[4] = { 0.0, 0.0, 0.0, 0.0 };
/* Note: This test makes sense up to alu_depth of 65536,
* but current drivers are not exactly efficient with such
* long programs, and if 16k works, then 64k will probably
* work, too ;-)
*/
if (!alu_depth || alu_depth > 16384 || alu_depth + 1 > max_alu_instructions) {
free(program_text);
return PIGLIT_SKIP;
}
printf("Testing: alu_depth = %u\n", alu_depth);
memcpy(program_text, program_Head, sizeof(program_Head)-1);
buildp = program_text + sizeof(program_Head)-1;
for(i = 0; i < alu_depth; ++i) {
float add[4];
int length;
step_add(i, add);
length = snprintf(buf, sizeof(buf),
program_Step, i == (alu_depth-1) ? program_Output : "r",
add[0], add[1], add[2], add[3]);
memcpy(buildp, buf, length);
buildp += length;
}
memcpy(buildp, program_Tail, sizeof(program_Tail));
// printf(program_text);
program_object = piglit_compile_program(GL_FRAGMENT_PROGRAM_ARB, program_text);
glEnable(GL_FRAGMENT_PROGRAM_ARB);
glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, program_object);
piglit_draw_rect(0, 0, 32, 32);
glDisable(GL_FRAGMENT_PROGRAM_ARB);
glDeleteProgramsARB(1, &program_object);
expected[0] = (alu_depth % 16) * 0.0625;
expected[1] = ((alu_depth/16) % 16) * 0.0625;
expected[2] = ((alu_depth/256) % 16) * 0.0625;
expected[3] = (alu_depth/4096) * 0.0625;
for(i = 0; i < ((alu_depth+3) % 4); ++i) {
float tmp = expected[3];
expected[3] = expected[2];
expected[2] = expected[1];
expected[1] = expected[0];
expected[0] = tmp;
}
if (expected[0] > 1.0)
expected[0] = 1.0;
if (expected[1] > 1.0)
expected[1] = 1.0;
if (expected[2] > 1.0)
expected[2] = 1.0;
if (expected[3] > 1.0)
expected[3] = 1.0;
if (!piglit_probe_pixel_rgba(16, 16, expected)) {
fprintf(stderr, "Failure in alu_depth = %i\n", alu_depth);
return PIGLIT_FAIL;
}
return PIGLIT_PASS;
}
enum piglit_result piglit_display(void)
{
enum piglit_result result;
unsigned int alu_depth;
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
glClear(GL_COLOR_BUFFER_BIT);
alu_depth = 1;
for(;;) {
result = test(alu_depth);
if (result == PIGLIT_SKIP)
break;
if (result != PIGLIT_PASS)
return result;
if (alu_depth < 8) {
alu_depth++;
} else {
/* Not quite powers of two to avoid aliasing */
alu_depth = (alu_depth * 2) - 5;
}
}
return PIGLIT_PASS;
}
void piglit_init(int argc, char ** argv)
{
piglit_require_fragment_program();
glGetProgramivARB(GL_FRAGMENT_PROGRAM_ARB,
GL_MAX_PROGRAM_NATIVE_ALU_INSTRUCTIONS_ARB,
&max_alu_instructions);
printf("Max (native) ALU instructions: %i\n",
max_alu_instructions);
}
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