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Fixed bug #80 Date: 21 Apr 2003 17:20:20 +0100 From: Alan Swanson <swanson@uklinux.net> Subject: [SDL] New XFree 4.3 Video Mode Patch If you look at the unsorted list of modes returned by X, here's mine; 1280 x 1024 @ 85.0 > 1024 x 768 @ 100.3 > USER 800 x 600 @ 125.5 > SET 640 x 480 @ 124.9 > 1280 x 1024 @ 75.0 ] 1280 x 1024 @ 60.0 ] 1280 x 960 @ 85.0 ] X11 1280 x 960 @ 60.0 ] AUTO 1152 x 864 @ 75.0 ]=20 1152 x 768 @ 54.8 ] 960 x 720 @ 120.0 ] ... 640 x 400 @ 85.1 ] 256k 576 x 432 @ 150.0 ] 249k PIXEL 640 x 350 @ 85.1 ] 224k COUNT 576 x 384 @ 109.6 ] 221k ... The user set modes come first followed by X set modes which are ordered by decreasing number of pixels and refresh. The reason why every other library or program not using SDL working is due to SDL scanning the modes in reverse getting X11 provided modes modes with the lowest refresh.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 05 May 2006 05:50:26 +0000
parents 8d9bb0cf2c2a
children 8b9d79e7eacf c121d94672cb
line wrap: on
line source


/* Simple program -- figure out what kind of video display we have */

#include <stdlib.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "SDL.h"

#define NUM_BLITS	10
#define NUM_UPDATES	500

#define FLAG_MASK	(SDL_HWSURFACE | SDL_FULLSCREEN | SDL_DOUBLEBUF | \
                         SDL_SRCCOLORKEY | SDL_SRCALPHA | SDL_RLEACCEL  | \
                         SDL_RLEACCELOK)

void PrintFlags(Uint32 flags)
{
	printf("0x%8.8x", (flags & FLAG_MASK));
	if ( flags & SDL_HWSURFACE ) {
		printf(" SDL_HWSURFACE");
	} else {
		printf(" SDL_SWSURFACE");
	}
	if ( flags & SDL_FULLSCREEN ) {
		printf(" | SDL_FULLSCREEN");
	}
	if ( flags & SDL_DOUBLEBUF ) {
		printf(" | SDL_DOUBLEBUF");
	}
	if ( flags & SDL_SRCCOLORKEY ) {
		printf(" | SDL_SRCCOLORKEY");
	}
	if ( flags & SDL_SRCALPHA ) {
		printf(" | SDL_SRCALPHA");
	}
	if ( flags & SDL_RLEACCEL ) {
		printf(" | SDL_RLEACCEL");
	}
	if ( flags & SDL_RLEACCELOK ) {
		printf(" | SDL_RLEACCELOK");
	}
}

int RunBlitTests(SDL_Surface *screen, SDL_Surface *bmp, int blitcount)
{
	int i, j;
	int maxx;
	int maxy;
	SDL_Rect dst;

	maxx = (int)screen->w - bmp->w + 1;
	maxy = (int)screen->h - bmp->h + 1;
	for ( i = 0; i < NUM_UPDATES; ++i ) {
		for ( j = 0; j < blitcount; ++j ) {
			if ( maxx ) {
				dst.x = rand() % maxx;
			} else {
				dst.x = 0;
			}
			if ( maxy ) {
				dst.y = rand() % maxy;
			} else {
				dst.y = 0;
			}
			dst.w = bmp->w;
			dst.h = bmp->h;
			SDL_BlitSurface(bmp, NULL, screen, &dst);
		}
		SDL_Flip(screen);
	}

	return i;
}

int RunModeTests(SDL_Surface *screen)
{
	Uint32 then, now;
	Uint32 frames;
	float seconds;
	int i;
	Uint8 r, g, b;
	SDL_Surface *bmp, *bmpcc, *tmp;
	SDL_Event event;

	while ( SDL_PollEvent(&event) ) {
		if ( event.type == SDL_KEYDOWN )
			return 0;
	}

	/* First test fills and screen update speed */
	printf("Running color fill and fullscreen update test\n");
	then = SDL_GetTicks();
	frames = 0;
	for ( i = 0; i < 256; ++i ) {
		r = i;
		g = 0;
		b = 0;
		SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, r, g, b));
		SDL_Flip(screen);
		++frames;
	}
	for ( i = 0; i < 256; ++i ) {
		r = 0;
		g = i;
		b = 0;
		SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, r, g, b));
		SDL_Flip(screen);
		++frames;
	}
	for ( i = 0; i < 256; ++i ) {
		r = 0;
		g = 0;
		b = i;
		SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, r, g, b));
		SDL_Flip(screen);
		++frames;
	}
	now = SDL_GetTicks();
	seconds = (float)(now - then) / 1000.0f;
	if ( seconds > 0.0f ) {
		printf("%d fills and flips in %2.2f seconds, %2.2f FPS\n", frames, seconds, (float)frames / seconds);
	} else {
		printf("%d fills and flips in zero seconds!n", frames);
	}

        /* clear the screen after fill test */
        SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 0, 0, 0));
	SDL_Flip(screen);

	while ( SDL_PollEvent(&event) ) {
		if ( event.type == SDL_KEYDOWN )
			return 0;
	}

        /* run the generic blit test */
	bmp = SDL_LoadBMP("sample.bmp");
	if ( ! bmp ) {
		printf("Couldn't load sample.bmp: %s\n", SDL_GetError());
		return 0;
	}
	printf("Running freshly loaded blit test: %dx%d at %d bpp, flags: ",
		bmp->w, bmp->h, bmp->format->BitsPerPixel);
	PrintFlags(bmp->flags);
	printf("\n");
	then = SDL_GetTicks();
	frames = RunBlitTests(screen, bmp, NUM_BLITS);
	now = SDL_GetTicks();
	seconds = (float)(now - then) / 1000.0f;
	if ( seconds > 0.0f ) {
		printf("%d blits / %d updates in %2.2f seconds, %2.2f FPS\n", NUM_BLITS*frames, frames, seconds, (float)frames / seconds);
	} else {
		printf("%d blits / %d updates in zero seconds!\n", NUM_BLITS*frames, frames);
	}

        /* clear the screen after blit test */
        SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 0, 0, 0));
	SDL_Flip(screen);

	while ( SDL_PollEvent(&event) ) {
		if ( event.type == SDL_KEYDOWN )
			return 0;
	}

        /* run the colorkeyed blit test */
	bmpcc = SDL_LoadBMP("sample.bmp");
	if ( ! bmpcc ) {
		printf("Couldn't load sample.bmp: %s\n", SDL_GetError());
		return 0;
	}
	printf("Running freshly loaded cc blit test: %dx%d at %d bpp, flags: ",
		bmpcc->w, bmpcc->h, bmpcc->format->BitsPerPixel);
        SDL_SetColorKey(bmpcc, SDL_SRCCOLORKEY | SDL_RLEACCEL, *(Uint8 *)bmpcc->pixels);

	PrintFlags(bmpcc->flags);
	printf("\n");
	then = SDL_GetTicks();
	frames = RunBlitTests(screen, bmpcc, NUM_BLITS);
	now = SDL_GetTicks();
	seconds = (float)(now - then) / 1000.0f;
	if ( seconds > 0.0f ) {
		printf("%d cc blits / %d updates in %2.2f seconds, %2.2f FPS\n", NUM_BLITS*frames, frames, seconds, (float)frames / seconds);
	} else {
		printf("%d cc blits / %d updates in zero seconds!\n", NUM_BLITS*frames, frames);
	}

        /* clear the screen after cc blit test */
        SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 0, 0, 0));
	SDL_Flip(screen);

	while ( SDL_PollEvent(&event) ) {
		if ( event.type == SDL_KEYDOWN )
			return 0;
	}

        /* run the generic blit test */
	tmp = bmp;
	bmp = SDL_DisplayFormat(bmp);
	SDL_FreeSurface(tmp);
	if ( ! bmp ) {
		printf("Couldn't convert sample.bmp: %s\n", SDL_GetError());
		return 0;
	}
	printf("Running display format blit test: %dx%d at %d bpp, flags: ",
		bmp->w, bmp->h, bmp->format->BitsPerPixel);
	PrintFlags(bmp->flags);
	printf("\n");
	then = SDL_GetTicks();
	frames = RunBlitTests(screen, bmp, NUM_BLITS);
	now = SDL_GetTicks();
	seconds = (float)(now - then) / 1000.0f;
	if ( seconds > 0.0f ) {
		printf("%d blits / %d updates in %2.2f seconds, %2.2f FPS\n", NUM_BLITS*frames, frames, seconds, (float)frames / seconds);
	} else {
		printf("%d blits / %d updates in zero seconds!\n", NUM_BLITS*frames, frames);
	}

        /* clear the screen after blit test */
        SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 0, 0, 0));
	SDL_Flip(screen);

	while ( SDL_PollEvent(&event) ) {
		if ( event.type == SDL_KEYDOWN )
			return 0;
	}

        /* run the colorkeyed blit test */
	tmp = bmpcc;
	bmpcc = SDL_DisplayFormat(bmpcc);
	SDL_FreeSurface(tmp);
	if ( ! bmpcc ) {
		printf("Couldn't convert sample.bmp: %s\n", SDL_GetError());
		return 0;
	}
	printf("Running display format cc blit test: %dx%d at %d bpp, flags: ",
		bmpcc->w, bmpcc->h, bmpcc->format->BitsPerPixel);
	PrintFlags(bmpcc->flags);
	printf("\n");
	then = SDL_GetTicks();
	frames = RunBlitTests(screen, bmpcc, NUM_BLITS);
	now = SDL_GetTicks();
	seconds = (float)(now - then) / 1000.0f;
	if ( seconds > 0.0f ) {
		printf("%d cc blits / %d updates in %2.2f seconds, %2.2f FPS\n", NUM_BLITS*frames, frames, seconds, (float)frames / seconds);
	} else {
		printf("%d cc blits / %d updates in zero seconds!\n", NUM_BLITS*frames, frames);
	}

        /* clear the screen after cc blit test */
        SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 0, 0, 0));
	SDL_Flip(screen);

	while ( SDL_PollEvent(&event) ) {
		if ( event.type == SDL_KEYDOWN )
			return 0;
	}

        /* run the alpha blit test only if screen bpp>8 */
        if (bmp->format->BitsPerPixel>8)
        {
		SDL_FreeSurface(bmp);
                bmp = SDL_LoadBMP("sample.bmp");
		SDL_SetAlpha(bmp, SDL_SRCALPHA, 85); /* 85 - 33% alpha */
		tmp = bmp;
		bmp = SDL_DisplayFormat(bmp);
		SDL_FreeSurface(tmp);
		if ( ! bmp ) {
			printf("Couldn't convert sample.bmp: %s\n", SDL_GetError());
			return 0;
		}
		printf("Running display format alpha blit test: %dx%d at %d bpp, flags: ",
			bmp->w, bmp->h, bmp->format->BitsPerPixel);
		PrintFlags(bmp->flags);
		printf("\n");
		then = SDL_GetTicks();
		frames = RunBlitTests(screen, bmp, NUM_BLITS);
		now = SDL_GetTicks();
		seconds = (float)(now - then) / 1000.0f;
		if ( seconds > 0.0f ) {
			printf("%d alpha blits / %d updates in %2.2f seconds, %2.2f FPS\n", NUM_BLITS*frames, frames, seconds, (float)frames / seconds);
		} else {
			printf("%d alpha blits / %d updates in zero seconds!\n", NUM_BLITS*frames, frames);
		}
	}

        /* clear the screen after alpha blit test */
        SDL_FillRect(screen, NULL, SDL_MapRGB(screen->format, 0, 0, 0));
	SDL_Flip(screen);

	while ( SDL_PollEvent(&event) ) {
		if ( event.type == SDL_KEYDOWN )
			return 0;
	}

        /* run the cc+alpha blit test only if screen bpp>8 */
        if (bmp->format->BitsPerPixel>8)
        {
		SDL_FreeSurface(bmpcc);
                bmpcc = SDL_LoadBMP("sample.bmp");
		SDL_SetAlpha(bmpcc, SDL_SRCALPHA, 85); /* 85 - 33% alpha */
                SDL_SetColorKey(bmpcc, SDL_SRCCOLORKEY | SDL_RLEACCEL, *(Uint8 *)bmpcc->pixels);
		tmp = bmpcc;
		bmpcc = SDL_DisplayFormat(bmpcc);
		SDL_FreeSurface(tmp);
		if ( ! bmpcc ) {
			printf("Couldn't convert sample.bmp: %s\n", SDL_GetError());
			return 0;
		}
		printf("Running display format cc+alpha blit test: %dx%d at %d bpp, flags: ",
			bmpcc->w, bmpcc->h, bmpcc->format->BitsPerPixel);
		PrintFlags(bmpcc->flags);
		printf("\n");
		then = SDL_GetTicks();
		frames = RunBlitTests(screen, bmpcc, NUM_BLITS);
		now = SDL_GetTicks();
		seconds = (float)(now - then) / 1000.0f;
		if ( seconds > 0.0f ) {
			printf("%d cc+alpha blits / %d updates in %2.2f seconds, %2.2f FPS\n", NUM_BLITS*frames, frames, seconds, (float)frames / seconds);
		} else {
			printf("%d cc+alpha blits / %d updates in zero seconds!\n", NUM_BLITS*frames, frames);
		}
	}

	SDL_FreeSurface(bmpcc);
	SDL_FreeSurface(bmp);

	while ( SDL_PollEvent(&event) ) {
		if ( event.type == SDL_KEYDOWN )
			return 0;
	}
	return 1;
}

void RunVideoTests()
{
	static const struct {
		int w, h, bpp;
	} mode_list[] = {
		{ 640, 480, 8 }, { 640, 480, 16 }, { 640, 480, 32 },
		{ 800, 600, 8 }, { 800, 600, 16 }, { 800, 600, 32 },
		{ 1024, 768, 8 }, { 1024, 768, 16 }, { 1024, 768, 32 }
	};
	static const Uint32 flags[] = {
		(SDL_SWSURFACE),
		(SDL_SWSURFACE | SDL_FULLSCREEN),
		(SDL_HWSURFACE | SDL_FULLSCREEN),
		(SDL_HWSURFACE | SDL_FULLSCREEN | SDL_DOUBLEBUF)
	};
	int i, j;
	SDL_Surface *screen;

	/* Test out several different video mode combinations */
	SDL_WM_SetCaption("SDL Video Benchmark", "vidtest");
	SDL_ShowCursor(0);
	for ( i = 0; i < SDL_TABLESIZE(mode_list); ++i ) {
		for ( j = 0; j < SDL_TABLESIZE(flags); ++j ) {
			printf("===================================\n");
			printf("Setting video mode: %dx%d at %d bpp, flags: ",
			                          mode_list[i].w,
			                          mode_list[i].h,
			                          mode_list[i].bpp);
			PrintFlags(flags[j]);
			printf("\n");
			screen = SDL_SetVideoMode(mode_list[i].w,
			                          mode_list[i].h,
			                          mode_list[i].bpp,
			                          flags[j]);
			if ( ! screen ) {
				printf("Setting video mode failed: %s\n", SDL_GetError());
				continue;
			}
			if ( (screen->flags & FLAG_MASK) != flags[j] ) {
				printf("Flags didn't match: ");
				PrintFlags(screen->flags);
				printf("\n");
				continue;
			}
			if ( ! RunModeTests(screen) ) {
				return;
			}
		}
	}
}

int main(int argc, char *argv[])
{
	const SDL_VideoInfo *info;
	int i;
	SDL_Rect **modes;
	char driver[128];

	if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
		fprintf(stderr,
			"Couldn't initialize SDL: %s\n", SDL_GetError());
		exit(1);
	}
	if ( SDL_VideoDriverName(driver, sizeof(driver)) ) {
		printf("Video driver: %s\n", driver);
	}
	info = SDL_GetVideoInfo();
	printf(
"Current display: %dx%d, %d bits-per-pixel\n",
		info->current_w, info->current_h, info->vfmt->BitsPerPixel);
	if ( info->vfmt->palette == NULL ) {
		printf("	Red Mask = 0x%.8x\n", info->vfmt->Rmask);
		printf("	Green Mask = 0x%.8x\n", info->vfmt->Gmask);
		printf("	Blue Mask = 0x%.8x\n", info->vfmt->Bmask);
	}
	/* Print available fullscreen video modes */
	modes = SDL_ListModes(NULL, SDL_FULLSCREEN);
	if ( modes == (SDL_Rect **)0 ) {
		printf("No available fullscreen video modes\n");
	} else
	if ( modes == (SDL_Rect **)-1 ) {
		printf("No special fullscreen video modes\n");
	} else {
		printf("Fullscreen video modes:\n");
		for ( i=0; modes[i]; ++i ) {
			printf("\t%dx%dx%d\n", modes[i]->w, modes[i]->h, info->vfmt->BitsPerPixel);
		}
	}
	if ( info->wm_available ) {
		printf("A window manager is available\n");
	}
	if ( info->hw_available ) {
		printf("Hardware surfaces are available (%dK video memory)\n",
			info->video_mem);
	}
	if ( info->blit_hw ) {
		printf(
"Copy blits between hardware surfaces are accelerated\n");
	}
	if ( info->blit_hw_CC ) {
		printf(
"Colorkey blits between hardware surfaces are accelerated\n");
	}
	if ( info->blit_hw_A ) {
		printf(
"Alpha blits between hardware surfaces are accelerated\n");
	}
	if ( info->blit_sw ) {
		printf(
"Copy blits from software surfaces to hardware surfaces are accelerated\n");
	}
	if ( info->blit_sw_CC ) {
		printf(
"Colorkey blits from software surfaces to hardware surfaces are accelerated\n");
	}
	if ( info->blit_sw_A ) {
		printf(
"Alpha blits from software surfaces to hardware surfaces are accelerated\n");
	}
	if ( info->blit_fill ) {
		printf(
"Color fills on hardware surfaces are accelerated\n");
	}

	if ( argv[1] && (strcmp(argv[1], "-benchmark") == 0) ) {
		RunVideoTests();
	}

	SDL_Quit();
	return(0);
}