/*

* Benchmarks surface-to-surface blits in various formats.

*

* Written by Ryan C. Gordon.

*/

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "SDL.h"

static SDL_Surface *dest = NULL;

static SDL_Surface *src = NULL;

static int testSeconds = 10;

static int percent(int val, int total)

{

return((int) ((((float) val) / ((float) total)) * 100.0f));

}

static int randRange(int lo, int hi)

{

return(lo + (int) (((double) hi)*rand()/(RAND_MAX+1.0)));

}

static void copy_trunc_str(char *str, size_t strsize, const char *flagstr)

{

if ( (strlen(str) + strlen(flagstr)) >= (strsize - 1) )

strcpy(str + (strsize - 5), " ...");

else

strcat(str, flagstr);

}

static void __append_sdl_surface_flag(SDL_Surface *_surface, char *str,

size_t strsize, Uint32 flag,

const char *flagstr)

{

if (_surface->flags & flag)

copy_trunc_str(str, strsize, flagstr);

} /* append_sdl_surface_flag */

#define append_sdl_surface_flag(a, b, c, fl) __append_sdl_surface_flag(a, b, c, fl, " " #fl)

#define print_tf_state(str, val) printf("%s: {%s}\n", str, (val) ? "true" : "false" )

static void output_surface_details(const char *name, SDL_Surface *surface)

{

printf("Details for %s:\n", name);

if (surface == NULL)

{

printf("-WARNING- You've got a NULL surface!");

}

else

{

char f[256];

printf(" width : %d\n", surface->w);

printf(" height : %d\n", surface->h);

printf(" depth : %d bits per pixel\n", surface->format->BitsPerPixel);

printf(" pitch : %d\n", (int) surface->pitch);

printf(" red : 0x%08X mask, %d shift, %d loss\n",

(int) surface->format->Rmask,

(int) surface->format->Rshift,

(int) surface->format->Rloss);

printf(" green : 0x%08X mask, %d shift, %d loss\n",

(int) surface->format->Gmask,

(int) surface->format->Gshift,

(int) surface->format->Gloss);

printf(" blue : 0x%08X mask, %d shift, %d loss\n",

(int) surface->format->Bmask,

(int) surface->format->Bshift,

(int) surface->format->Bloss);

printf(" alpha : 0x%08X mask, %d shift, %d loss\n",

(int) surface->format->Amask,

(int) surface->format->Ashift,

(int) surface->format->Aloss);

f[0] = '\0';

/*append_sdl_surface_flag(surface, f, sizeof (f), SDL_SWSURFACE);*/

if ((surface->flags & SDL_HWSURFACE) == 0)

copy_trunc_str(f, sizeof (f), " SDL_SWSURFACE");

append_sdl_surface_flag(surface, f, sizeof (f), SDL_HWSURFACE);

append_sdl_surface_flag(surface, f, sizeof (f), SDL_ASYNCBLIT);

append_sdl_surface_flag(surface, f, sizeof (f), SDL_ANYFORMAT);

append_sdl_surface_flag(surface, f, sizeof (f), SDL_HWPALETTE);

append_sdl_surface_flag(surface, f, sizeof (f), SDL_DOUBLEBUF);

append_sdl_surface_flag(surface, f, sizeof (f), SDL_FULLSCREEN);

append_sdl_surface_flag(surface, f, sizeof (f), SDL_OPENGL);

append_sdl_surface_flag(surface, f, sizeof (f), SDL_OPENGLBLIT);

append_sdl_surface_flag(surface, f, sizeof (f), SDL_RESIZABLE);

append_sdl_surface_flag(surface, f, sizeof (f), SDL_NOFRAME);

append_sdl_surface_flag(surface, f, sizeof (f), SDL_HWACCEL);

append_sdl_surface_flag(surface, f, sizeof (f), SDL_SRCCOLORKEY);

append_sdl_surface_flag(surface, f, sizeof (f), SDL_RLEACCELOK);

append_sdl_surface_flag(surface, f, sizeof (f), SDL_RLEACCEL);

append_sdl_surface_flag(surface, f, sizeof (f), SDL_SRCALPHA);

append_sdl_surface_flag(surface, f, sizeof (f), SDL_PREALLOC);

if (f[0] == '\0')

strcpy(f, " (none)");

printf(" flags :%s\n", f);

#if 0

info = SDL_GetVideoInfo();

assert(info != NULL);

print_tf_state("hardware surface available", info->hw_available);

print_tf_state("window manager available", info->wm_available);

print_tf_state("accelerated hardware->hardware blits", info->blit_hw);

print_tf_state("accelerated hardware->hardware colorkey blits", info->blit_hw_CC);

print_tf_state("accelerated hardware->hardware alpha blits", info->blit_hw_A);

print_tf_state("accelerated software->hardware blits", info->blit_sw);

print_tf_state("accelerated software->hardware colorkey blits", info->blit_sw_CC);

print_tf_state("accelerated software->hardware alpha blits", info->blit_sw_A);

print_tf_state("accelerated color fills", info->blit_fill);

printf("video memory: (%d)\n", info->video_mem);

#endif

} /* else */

printf("\n");

}

static void output_details(void)

{

output_surface_details("Source Surface", src);

output_surface_details("Destination Surface", dest);

}

static Uint32 blit(SDL_Surface *dst, SDL_Surface *src, int x, int y)

{

Uint32 start = 0;

SDL_Rect srcRect;

SDL_Rect dstRect;

srcRect.x = 0;

srcRect.y = 0;

dstRect.x = x;

dstRect.y = y;

dstRect.w = srcRect.w = src->w; /* SDL will clip as appropriate. */

dstRect.h = srcRect.h = src->h;

start = SDL_GetTicks();

SDL_BlitSurface(src, &srcRect, dst, &dstRect);

return(SDL_GetTicks() - start);

}

static void blitCentered(SDL_Surface *dst, SDL_Surface *src)

{

int x = (dst->w - src->w) / 2;

int y = (dst->h - src->h) / 2;

blit(dst, src, x, y);

}

static int atoi_hex(const char *str)

{

if (str == NULL)

return 0;

if (strlen(str) > 2)

{

int retval = 0;

if ((str[0] == '0') && (str[1] == 'x'))

sscanf(str + 2, "%X", &retval);

return(retval);

}

return(atoi(str));

}

static int setup_test(int argc, char **argv)

{

const char *dumpfile = NULL;

SDL_Surface *bmp = NULL;

Uint32 dstbpp = 32;

Uint32 dstrmask = 0x00FF0000;

Uint32 dstgmask = 0x0000FF00;

Uint32 dstbmask = 0x000000FF;

Uint32 dstamask = 0x00000000;

Uint32 dstflags = 0;

int dstw = 640;

int dsth = 480;

Uint32 srcbpp = 32;

Uint32 srcrmask = 0x00FF0000;

Uint32 srcgmask = 0x0000FF00;

Uint32 srcbmask = 0x000000FF;

Uint32 srcamask = 0x00000000;

Uint32 srcflags = 0;

int srcw = 640;

int srch = 480;

int screenSurface = 0;

int i;

for (i = 1; i < argc; i++)

{

const char *arg = argv[i];

if (strcmp(arg, "--dstbpp") == 0)

dstbpp = atoi(argv[++i]);

else if (strcmp(arg, "--dstrmask") == 0)

dstrmask = atoi_hex(argv[++i]);

else if (strcmp(arg, "--dstgmask") == 0)

dstgmask = atoi_hex(argv[++i]);

else if (strcmp(arg, "--dstbmask") == 0)

dstbmask = atoi_hex(argv[++i]);

else if (strcmp(arg, "--dstamask") == 0)

dstamask = atoi_hex(argv[++i]);

else if (strcmp(arg, "--dstwidth") == 0)

dstw = atoi(argv[++i]);

else if (strcmp(arg, "--dstheight") == 0)

dsth = atoi(argv[++i]);

else if (strcmp(arg, "--dsthwsurface") == 0)

dstflags |= SDL_HWSURFACE;

else if (strcmp(arg, "--srcbpp") == 0)

srcbpp = atoi(argv[++i]);

else if (strcmp(arg, "--srcrmask") == 0)

srcrmask = atoi_hex(argv[++i]);

else if (strcmp(arg, "--srcgmask") == 0)

srcgmask = atoi_hex(argv[++i]);

else if (strcmp(arg, "--srcbmask") == 0)

srcbmask = atoi_hex(argv[++i]);

else if (strcmp(arg, "--srcamask") == 0)

srcamask = atoi_hex(argv[++i]);

else if (strcmp(arg, "--srcwidth") == 0)

srcw = atoi(argv[++i]);

else if (strcmp(arg, "--srcheight") == 0)

srch = atoi(argv[++i]);

else if (strcmp(arg, "--srchwsurface") == 0)

srcflags |= SDL_HWSURFACE;

else if (strcmp(arg, "--seconds") == 0)

testSeconds = atoi(argv[++i]);

else if (strcmp(arg, "--screen") == 0)

screenSurface = 1;

else if (strcmp(arg, "--dumpfile") == 0)

dumpfile = argv[++i];

else

{

fprintf(stderr, "Unknown commandline option: %s\n", arg);

return(0);

}

}

if (SDL_Init(SDL_INIT_VIDEO) == -1)

{

fprintf(stderr, "SDL_Init failed: %s\n", SDL_GetError());

return(0);

}

bmp = SDL_LoadBMP("sample.bmp");

if (bmp == NULL)

{

fprintf(stderr, "SDL_LoadBMP failed: %s\n", SDL_GetError());

SDL_Quit();

return(0);

}

if ((dstflags & SDL_HWSURFACE) == 0) dstflags |= SDL_SWSURFACE;

if ((srcflags & SDL_HWSURFACE) == 0) srcflags |= SDL_SWSURFACE;

if (screenSurface)

dest = SDL_SetVideoMode(dstw, dsth, dstbpp, dstflags);

else

{

dest = SDL_CreateRGBSurface(dstflags, dstw, dsth, dstbpp,

dstrmask, dstgmask, dstbmask, dstamask);

}

if (dest == NULL)

{

fprintf(stderr, "dest surface creation failed: %s\n", SDL_GetError());

SDL_Quit();

return(0);

}

src = SDL_CreateRGBSurface(srcflags, srcw, srch, srcbpp,

srcrmask, srcgmask, srcbmask, srcamask);

if (src == NULL)

{

fprintf(stderr, "src surface creation failed: %s\n", SDL_GetError());

SDL_Quit();

return(0);

}

/* set some sane defaults so we can see if the blit code is broken... */

SDL_FillRect(dest, NULL, SDL_MapRGB(dest->format, 0, 0, 0));

SDL_FillRect(src, NULL, SDL_MapRGB(src->format, 0, 0, 0));

blitCentered(src, bmp);

SDL_FreeSurface(bmp);

if (dumpfile)

SDL_SaveBMP(src, dumpfile); /* make sure initial convert is sane. */

output_details();

return(1);

}

static void test_blit_speed(void)

{

Uint32 clearColor = SDL_MapRGB(dest->format, 0, 0, 0);

Uint32 iterations = 0;

Uint32 elasped = 0;

Uint32 end = 0;

Uint32 now = 0;

Uint32 last = 0;

int testms = testSeconds * 1000;

int wmax = (dest->w - src->w);

int hmax = (dest->h - src->h);

int isScreen = (SDL_GetVideoSurface() == dest);

SDL_Event event;

printf("Testing blit speed for %d seconds...\n", testSeconds);

now = SDL_GetTicks();

end = now + testms;

do

{

/* pump the event queue occasionally to keep OS happy... */

if (now - last > 1000)

{

last = now;

while (SDL_PollEvent(&event)) { /* no-op. */ }

}

iterations++;

elasped += blit(dest, src, randRange(0, wmax), randRange(0, hmax));

if (isScreen)

{

SDL_Flip(dest); /* show it! */

SDL_FillRect(dest, NULL, clearColor); /* blank it for next time! */

}

now = SDL_GetTicks();

} while (now < end);

printf("Non-blitting crap accounted for %d percent of this run.\n",

percent(testms - elasped, testms));

printf("%d blits took %d ms (%d fps).\n",

(int) iterations,

(int) elasped,

(int) (((float)iterations) / (((float)elasped) / 1000.0f)));

}

int main(int argc, char **argv)

{

int initialized = setup_test(argc, argv);

if (initialized)

{

test_blit_speed();

SDL_Quit();

}

return(!initialized);

}

/* end of testblitspeed.c ... */