view test/testtypes.c @ 1257:448a9a64537b

[PATCH] SDL_GetVideoMode() does not find best mode, part 2 Following commit 1.51, I come accross a problem when SDL must choose between several video modes that could suit the one asked. If I ask 320x240 with this list: 768x480 768x240 640x400 640x200 384x480 384x240 320x400 320x200 The smallest selectables modes are 384x240 and 320x400. And SDL choose the later in this list, but 384x240 is more suitable. So I added a check to compare the pixel count (surface) of modes, and select the one which has the smallest pixel count. In my example, 384x240 has 92160 pixels, and 320x400 has 128000 pixels. So now SDL will choose 384x240 for the asked 320x240 mode.
author Patrice Mandin <patmandin@gmail.com>
date Thu, 19 Jan 2006 21:28:52 +0000
parents d93862a3d821
children 835c1831f903
line wrap: on
line source


#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "SDL_main.h"
#include "SDL_types.h"

/*
 * Watcom C flags these as Warning 201: "Unreachable code" if you just
 *  compare them directly, so we push it through a function to keep the
 *  compiler quiet.  --ryan.
 */
static int badsize(size_t sizeoftype, size_t hardcodetype)
{
    return sizeoftype != hardcodetype;
}

int main(int argc, char *argv[])
{
	int error = 0;
	int verbose = 1;

	if ( argv[1] && (strcmp(argv[1], "-q") == 0) )
		verbose = 0;

	if ( badsize(sizeof(Uint8), 1) ) {
		if ( verbose )
			printf("sizeof(Uint8) != 1, instead = %d\n",
								sizeof(Uint8));
		++error;
	}
	if ( badsize(sizeof(Uint16), 2) ) {
		if ( verbose )
			printf("sizeof(Uint16) != 2, instead = %d\n",
								sizeof(Uint16));
		++error;
	}
	if ( badsize(sizeof(Uint32), 4) ) {
		if ( verbose )
			printf("sizeof(Uint32) != 4, instead = %d\n",
								sizeof(Uint32));
		++error;
	}
#ifdef SDL_HAS_64BIT_TYPE
	if ( badsize(sizeof(Uint64), 8) ) {
		if ( verbose )
			printf("sizeof(Uint64) != 8, instead = %d\n",
								sizeof(Uint64));
		++error;
	}
#else
	if ( verbose ) {
		printf("WARNING: No 64-bit datatype on this platform\n");
	}
#endif
	if ( verbose && ! error )
		printf("All data types are the expected size.\n");

	return( error ? 1 : 0 );
}