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/*
* Benchmark for memory blenders.
*/
#include <stdio.h>
#include <allegro5/allegro.h>
#include <allegro5/allegro_image.h>
#include <allegro5/allegro_primitives.h>
#include <time.h>
#include "common.c"
/* Do a few un-timed runs to switch CPU to performance mode and cache
* data and so on - seems to make the results more stable here.
* Also used to guess the number of timed iterations.
*/
#define WARMUP 100
/* How many seconds the timing should approximately take - a fixed
* number of iterations is not enough on very fast systems but takes
* too long on slow systems.
*/
#define TEST_TIME 5.0
enum Mode {
ALL,
PLAIN_BLIT,
SCALED_BLIT,
ROTATE_BLIT
};
static char const *names[] = {
"", "Plain blit", "Scaled blit", "Rotated blit"
};
ALLEGRO_DISPLAY *display;
static void step(enum Mode mode, ALLEGRO_BITMAP *b2)
{
switch (mode) {
case ALL: break;
case PLAIN_BLIT:
al_draw_bitmap(b2, 0, 0, 0);
break;
case SCALED_BLIT:
al_draw_scaled_bitmap(b2, 0, 0, 320, 200, 0, 0, 640, 480, 0);
break;
case ROTATE_BLIT:
al_draw_scaled_rotated_bitmap(b2, 10, 10, 10, 10, 2.0, 2.0,
ALLEGRO_PI/30, 0);
break;
}
}
/* al_get_current_time() measures wallclock time - but for the benchmark
* result we prefer CPU time so clock() is better.
*/
static double current_clock(void)
{
clock_t c = clock();
return (double)c / CLOCKS_PER_SEC;
}
static bool do_test(enum Mode mode)
{
ALLEGRO_STATE state;
ALLEGRO_BITMAP *b1;
ALLEGRO_BITMAP *b2;
int REPEAT;
double t0, t1;
int i;
al_set_new_bitmap_flags(ALLEGRO_MEMORY_BITMAP);
b1 = al_load_bitmap("data/mysha.pcx");
if (!b1) {
abort_example("Error loading data/mysha.pcx\n");
return false;
}
b2 = al_load_bitmap("data/allegro.pcx");
if (!b2) {
abort_example("Error loading data/mysha.pcx\n");
return false;
}
al_set_target_bitmap(b1);
al_set_blender(ALLEGRO_ADD, ALLEGRO_ONE, ALLEGRO_INVERSE_ALPHA);
step(mode, b2);
/* Display the blended bitmap to the screen so we can see something. */
al_store_state(&state, ALLEGRO_STATE_ALL);
al_set_target_backbuffer(display);
al_set_blender(ALLEGRO_ADD, ALLEGRO_ONE, ALLEGRO_ZERO);
al_draw_bitmap(b1, 0, 0, 0);
al_flip_display();
al_restore_state(&state);
log_printf("Benchmark: %s\n", names[mode]);
log_printf("Please wait...\n");
/* Do warmup run and estimate required runs for real test. */
t0 = current_clock();
for (i = 0; i < WARMUP; i++) {
step(mode, b2);
}
t1 = current_clock();
REPEAT = TEST_TIME * 100 / (t1 - t0);
/* Do the real test. */
t0 = current_clock();
for (i = 0; i < REPEAT; i++) {
step(mode, b2);
}
t1 = current_clock();
log_printf("Time = %g s, %d steps\n",
t1 - t0, REPEAT);
log_printf("%s: %g FPS\n", names[mode], REPEAT / (t1 - t0));
log_printf("Done\n");
al_destroy_bitmap(b1);
al_destroy_bitmap(b2);
return true;
}
int main(int argc, char **argv)
{
enum Mode mode = ALL;
int i;
if (argc > 1) {
i = strtol(argv[1], NULL, 10);
switch (i) {
case 0:
mode = PLAIN_BLIT;
break;
case 1:
mode = SCALED_BLIT;
break;
case 2:
mode = ROTATE_BLIT;
break;
}
}
if (!al_init()) {
abort_example("Could not init Allegro\n");
}
open_log();
al_init_image_addon();
al_init_primitives_addon();
init_platform_specific();
display = al_create_display(640, 480);
if (!display) {
abort_example("Error creating display\n");
}
if (mode == ALL) {
for (mode = PLAIN_BLIT; mode <= ROTATE_BLIT; mode++) {
do_test(mode);
}
}
else {
do_test(mode);
}
al_destroy_display(display);
close_log(true);
return 0;
}
/* vim: set sts=3 sw=3 et: */
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