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testblitspeed.c
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/*
* 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;
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static int
percent(int val, int total)
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return ((int) ((((float) val) / ((float) total)) * 100.0f));
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static int
randRange(int lo, int hi)
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return (lo + (int) (((double) hi) * rand() / (RAND_MAX + 1.0)));
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static void
copy_trunc_str(char *str, size_t strsize, const char *flagstr)
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if ((strlen(str) + strlen(flagstr)) >= (strsize - 1))
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strcpy(str + (strsize - 5), " ...");
else
strcat(str, flagstr);
}
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static void
__append_sdl_surface_flag(SDL_Surface * _surface, char *str,
size_t strsize, Uint32 flag, const char *flagstr)
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{
if (_surface->flags & flag)
copy_trunc_str(str, strsize, flagstr);
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#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" )
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static void
output_videoinfo_details(void)
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{
const SDL_VideoInfo *info = SDL_GetVideoInfo();
printf("SDL_GetVideoInfo():\n");
if (info == NULL)
printf(" (null.)\n");
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print_tf_state(" hardware surface available", info->hw_available);
print_tf_state(" window manager available", info->wm_available);
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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);
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print_tf_state(" accelerated color fills", info->blit_fill);
printf(" video memory: (%d)\n", info->video_mem);
}
printf("\n");
}
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static void
output_surface_details(const char *name, SDL_Surface * surface)
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{
printf("Details for %s:\n", name);
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if (surface == NULL) {
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printf("-WARNING- You've got a NULL surface!");
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char f[256];
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printf(" width : %d\n", surface->w);
printf(" height : %d\n", surface->h);
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printf(" depth : %d bits per pixel\n",
surface->format->BitsPerPixel);
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printf(" pitch : %d\n", (int) surface->pitch);
printf(" red bits : 0x%08X mask, %d shift, %d loss\n",
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(int) surface->format->Rmask,
(int) surface->format->Rshift, (int) surface->format->Rloss);
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printf(" green bits : 0x%08X mask, %d shift, %d loss\n",
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(int) surface->format->Gmask,
(int) surface->format->Gshift, (int) surface->format->Gloss);
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printf(" blue bits : 0x%08X mask, %d shift, %d loss\n",
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(int) surface->format->Bmask,
(int) surface->format->Bshift, (int) surface->format->Bloss);
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printf(" alpha bits : 0x%08X mask, %d shift, %d loss\n",
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(int) surface->format->Amask,
(int) surface->format->Ashift, (int) surface->format->Aloss);
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f[0] = '\0';
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/*append_sdl_surface_flag(surface, f, sizeof (f), SDL_SWSURFACE); */
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if ((surface->flags & SDL_HWSURFACE) == 0)
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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_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);
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if (f[0] == '\0')
strcpy(f, " (none)");
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printf(" flags :%s\n", f);
}
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printf("\n");
}
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static void
output_details(void)
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output_videoinfo_details();
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output_surface_details("Source Surface", src);
output_surface_details("Destination Surface", dest);
}
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static Uint32
blit(SDL_Surface * dst, SDL_Surface * src, int x, int y)
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{
Uint32 start = 0;
SDL_Rect srcRect;
SDL_Rect dstRect;
srcRect.x = 0;
srcRect.y = 0;
dstRect.x = x;
dstRect.y = y;
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dstRect.w = srcRect.w = src->w; /* SDL will clip as appropriate. */
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dstRect.h = srcRect.h = src->h;
start = SDL_GetTicks();
SDL_BlitSurface(src, &srcRect, dst, &dstRect);
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return (SDL_GetTicks() - start);
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static void
blitCentered(SDL_Surface * dst, SDL_Surface * src)
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{
int x = (dst->w - src->w) / 2;
int y = (dst->h - src->h) / 2;
blit(dst, src, x, y);
}
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static int
atoi_hex(const char *str)
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{
if (str == NULL)
return 0;
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if (strlen(str) > 2) {
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int retval = 0;
if ((str[0] == '0') && (str[1] == 'x'))
sscanf(str + 2, "%X", &retval);
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return (retval);
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return (atoi(str));
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static int
setup_test(int argc, char **argv)
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{
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;
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Uint32 origsrcalphaflags = 0;
Uint32 origdstalphaflags = 0;
Uint32 srcalphaflags = 0;
Uint32 dstalphaflags = 0;
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Uint8 origsrcalpha = 255;
Uint8 origdstalpha = 255;
Uint8 srcalpha = 255;
Uint8 dstalpha = 255;
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int screenSurface = 0;
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for (i = 1; i < argc; i++) {
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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];
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/* !!! FIXME: set colorkey. */
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else if (0) { /* !!! FIXME: we handle some commandlines elsewhere now */
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fprintf(stderr, "Unknown commandline option: %s\n", arg);
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if (SDL_Init(SDL_INIT_VIDEO) == -1) {
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fprintf(stderr, "SDL_Init failed: %s\n", SDL_GetError());
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}
bmp = SDL_LoadBMP("sample.bmp");
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if (bmp == NULL) {
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fprintf(stderr, "SDL_LoadBMP failed: %s\n", SDL_GetError());
SDL_Quit();
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if ((dstflags & SDL_HWSURFACE) == 0)
dstflags |= SDL_SWSURFACE;
if ((srcflags & SDL_HWSURFACE) == 0)
srcflags |= SDL_SWSURFACE;
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if (screenSurface)
dest = SDL_SetVideoMode(dstw, dsth, dstbpp, dstflags);
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dest = SDL_CreateRGBSurface(dstflags, dstw, dsth, dstbpp,
dstrmask, dstgmask, dstbmask, dstamask);
}
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if (dest == NULL) {
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fprintf(stderr, "dest surface creation failed: %s\n", SDL_GetError());
SDL_Quit();
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}
src = SDL_CreateRGBSurface(srcflags, srcw, srch, srcbpp,
srcrmask, srcgmask, srcbmask, srcamask);
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if (src == NULL) {
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fprintf(stderr, "src surface creation failed: %s\n", SDL_GetError());
SDL_Quit();
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/* handle alpha settings... */
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srcalphaflags = (src->flags & SDL_SRCALPHA) | (src->flags & SDL_RLEACCEL);
dstalphaflags =
(dest->flags & SDL_SRCALPHA) | (dest->flags & SDL_RLEACCEL);
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origsrcalphaflags = srcalphaflags;
origdstalphaflags = dstalphaflags;
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SDL_GetSurfaceAlphaMod(src, &srcalpha);
SDL_GetSurfaceAlphaMod(dest, &dstalpha);
origsrcalpha = srcalpha;
origdstalpha = dstalpha;
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for (i = 1; i < argc; i++) {
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const char *arg = argv[i];
if (strcmp(arg, "--srcalpha") == 0)
srcalpha = atoi(argv[++i]);
else if (strcmp(arg, "--dstalpha") == 0)
dstalpha = atoi(argv[++i]);
else if (strcmp(arg, "--srcsrcalpha") == 0)
srcalphaflags |= SDL_SRCALPHA;
else if (strcmp(arg, "--srcnosrcalpha") == 0)
srcalphaflags &= ~SDL_SRCALPHA;
else if (strcmp(arg, "--srcrleaccel") == 0)
srcalphaflags |= SDL_RLEACCEL;
else if (strcmp(arg, "--srcnorleaccel") == 0)
srcalphaflags &= ~SDL_RLEACCEL;
else if (strcmp(arg, "--dstsrcalpha") == 0)
dstalphaflags |= SDL_SRCALPHA;
else if (strcmp(arg, "--dstnosrcalpha") == 0)
dstalphaflags &= ~SDL_SRCALPHA;
else if (strcmp(arg, "--dstrleaccel") == 0)
dstalphaflags |= SDL_RLEACCEL;
else if (strcmp(arg, "--dstnorleaccel") == 0)
dstalphaflags &= ~SDL_RLEACCEL;
}
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if ((dstalphaflags != origdstalphaflags) || (origdstalpha != dstalpha))
SDL_SetAlpha(dest, dstalphaflags, dstalpha);
if ((srcalphaflags != origsrcalphaflags) || (origsrcalpha != srcalpha))
SDL_SetAlpha(src, srcalphaflags, srcalpha);
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/* 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)
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SDL_SaveBMP(src, dumpfile); /* make sure initial convert is sane. */
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output_details();
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static void
test_blit_speed(void)
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{
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;
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/* pump the event queue occasionally to keep OS happy... */
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if (now - last > 1000) {
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last = now;
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while (SDL_PollEvent(&event)) { /* no-op. */
}
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}
iterations++;
elasped += blit(dest, src, randRange(0, wmax), randRange(0, hmax));
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if (isScreen) {
SDL_Flip(dest); /* show it! */
SDL_FillRect(dest, NULL, clearColor); /* blank it for next time! */
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}
now = SDL_GetTicks();
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} while (now < end);
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printf("Non-blitting crap accounted for %d percent of this run.\n",
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percent(testms - elasped, testms));
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printf("%d blits took %d ms (%d fps).\n",
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(int) iterations,
(int) elasped,
(int) (((float) iterations) / (((float) elasped) / 1000.0f)));
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int
main(int argc, char **argv)
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{
int initialized = setup_test(argc, argv);
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if (initialized) {
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test_blit_speed();
SDL_Quit();
}
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return (!initialized);
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}
/* end of testblitspeed.c ... */