tools.h

int LoadTGA(Spriteset& tiles, const char *filename)
{
	FILE *file;
	unsigned char byte, crap[16], id_length;
	int n, width, height, channels, x, y;
	file=fopen(filename, "rb");
	if (!file)
		return -1;
	fread(&id_length, 1, 1, file);
	fread(crap, 1, 11, file);
	width=0;
	height=0;
	fread(&width, 1, 2, file);	// width
	fread(&height, 1, 2, file);	// height
	fread(&byte, 1, 1, file);	// bits
	channels=byte/8;
	fread(&byte, 1, 1, file);	// image descriptor byte (per-bit info)
	for(n=0;n<id_length;n++)
		fread(&byte, 1, 1, file);	// image description
	tiles.data=(DWORD*)malloc(width*height*sizeof(DWORD));
	for(y=height-1;y>=0;y--)
		for(x=0;x<width;x++)
		{
			DWORD pixel=0;
			fread(&byte, 1, 1, file);
			pixel|=byte;
			fread(&byte, 1, 1, file);
			pixel|=byte<<8;
			fread(&byte, 1, 1, file);
			pixel|=byte<<16;
			tiles.data[y*width+x]=pixel;
		}
	fclose(file);
	tiles.height=height;
	tiles.width=height;
	tiles.pitch=width;
	
	return 0;
}

void ClearScreen(DWORD color)
{
	for(int y=0;y<480;y++)
	{
		int offset=y*ddkpitch;
		for(int x=0;x<640;x+=8)
		{
			ddkscreen32[offset++]=color;
			ddkscreen32[offset++]=color;
			ddkscreen32[offset++]=color;
			ddkscreen32[offset++]=color;
			ddkscreen32[offset++]=color;
			ddkscreen32[offset++]=color;
			ddkscreen32[offset++]=color;
			ddkscreen32[offset++]=color;
		}
	}
}

void DrawBar(int sx, int sy, int w, int h, DWORD color)
{
	for(int y=sy;y<sy+h;y++)
	{
		int offset=y*ddkpitch+sx;
		int x1=0;
		if(w>8)
			for(x1=0;x1<w-8;x1+=8)
			{
				ddkscreen32[offset++]=color;
				ddkscreen32[offset++]=color;
				ddkscreen32[offset++]=color;
				ddkscreen32[offset++]=color;
				ddkscreen32[offset++]=color;
				ddkscreen32[offset++]=color;
				ddkscreen32[offset++]=color;
				ddkscreen32[offset++]=color;
			}
		for(int x=x1;x<w;x++)
			ddkscreen32[offset++]=color;
	}
}

void DrawBox(int sx, int sy, int w, int h, DWORD color)
{
	DrawBar(sx, sy, w, 1, color);
	DrawBar(sx, sy, 1, h, color);
	DrawBar(sx+w, sy, 1, h, color);
	DrawBar(sx, sy+h, w+1, 1, color);
}

void DrawSprite(Spriteset& sprites, int sx, int sy, int i, DWORD color)
{
	for(int y=0;y<sprites.height;y++)
	{
		int offset=(sy+y)*ddkpitch+sx;
		int spoffset=y*sprites.pitch+i*sprites.width;
		if(color&0xFF000000)
			for(int x=0;x<sprites.width;x++)
			{
				DWORD p=sprites.data[spoffset++];
				if(p!=0x300030)
					ddkscreen32[offset+x]=p;
			}
		else
			for(int x=0;x<sprites.width;x++)
			{
				DWORD p=sprites.data[spoffset++];
				if(p!=0x300030)
					ddkscreen32[offset+x]=color;
			}
	}
}

void DrawText(int sx, int sy, DWORD color, const char *string, ...)
{
	char string2[256];
	va_list args;

	va_start(args, string);
	vsprintf(string2, string, args);
	va_end(args);

	int len=strlen(string2);
	for(int i=0;i<len;i++)
		DrawSprite(font, sx+i*8, sy, string2[i]-' ', color);
}

bool MouseInBox(int x, int y, int w, int h)
{
	if(mouse_x>=x && mouse_x<x+w && mouse_y>=y && mouse_y<y+h)
		return true;
	return false;
}