/* 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)

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");

	}

}

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_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);

	}

	while ( SDL_PollEvent(&event) ) {

		if ( event.type == SDL_KEYDOWN )

			return 0;

	}

	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);

	}

	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);

	}

	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: %d bits-per-pixel\n",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);

}