Hey there,
Just have a quick question. i've written a program and it needs to
send a email to confirm it's completed. now i've done the
mail -s "Subject" test@test.com
the problem is the program, when run just waits. it doesn't execute the next command unless i press ^D. is there away... (6 Replies)
Hi, I'm a newer for this languages, and I have a log file, which is something like this:
35.75.253.207 - - "GET /products/orgonizer/title.png HTTP/1.1" 200 1555 "-" "Mozilla 1.4"
Now, I want to write a shell code to accoplish like ./XXX.sh -N n
n is a number by user input, the code should... (5 Replies)
I need to make a small script that figures out if a filename that the user enters is a file or a directory. and if it is a directory, how many files are in it.
please point me to the right direction, I am a newbie at this. (1 Reply)
Hello all,
I am new to unix and having the below problem.Any help will be appreciated.
Write a Bourn shell script dTOe which takes as an input any number
between 0 and 999 and prints the English value for this number. The
program should display an error message when a NOT digit value entered.... (1 Reply)
Hey guys,
I am trying to do a bourne script to look for c files in the current directory. I had it working where it finds the files and asks you to delete them or not, which works, but if there i no files, then it comes up with errors, which iam trying to get rid of. So I thought I would do a if... (2 Replies)
This is a new exercise for me
1.) Create a bourne shell script that can accept 2 arguments/parameters. Name your script as housekeep_files.sh.
2.) The script will delete the files specified in the input file (1st parameter) and will send a notification through email (2nd parameter) the... (1 Reply)
how to use if-loop in bourne shell with multiple conditions like follows
if
then
commands
fi
it gives me an error
test: ] missing
then i put
if ]
it gives me an error
[[ not found
kindly i need the syntex for the bourne shell (5 Replies)
Hey guys not sure why but when i execute the script i get the correct result but then it says command not found not sure why can anyone see anything wrong with my code below?
I just want to print how much quota i have used in my home directory
#!bin/sh
`quota -v | grep ^/home | awk... (2 Replies)
Attempting to write a script to eventually notify me via email for when there is packetloss across the backbone. I am looking for values greater than 0% in the mtr field.
#!/bin/sh
target=www.google.com
date +"%D"_"%T" >> /home/rich/mtr.log
echo "----------------------------------------" >>... (1 Reply)
Hello
I am having issues with a script I'm working on developing on a Solaris machine.
The script is intended to find out how many times a particular user (by given userid) has logged into the local system for more than one hour today.
Here is my while loop:
last $user | grep -v 'sshd'... (7 Replies)
Discussion started by: DaveRich
7 Replies
LEARN ABOUT REDHAT
sdl_pixelformat
SDL_PixelFormat(3) SDL API Reference SDL_PixelFormat(3)NAME
SDL_PixelFormat- Stores surface format information
STRUCTURE DEFINITION
typedef struct{
SDL_Palette *palette;
Uint8 BitsPerPixel;
Uint8 BytesPerPixel;
Uint32 Rmask, Gmask, Bmask, Amask;
Uint8 Rshift, Gshift, Bshift, Ashift;
Uint8 Rloss, Gloss, Bloss, Aloss;
Uint32 colorkey;
Uint8 alpha;
} SDL_PixelFormat;
STRUCTURE DATA
palette Pointer to the palette, or NULL if the BitsPerPixel>8
BitsPerPixel The number of bits used to represent each pixel in a surface. Usually 8, 16, 24 or 32.
BytesPerPixel The number of bytes used to represent each pixel in a surface. Usually one to four.
[RGBA]mask Binary mask used to retrieve individual color values
[RGBA]loss Precision loss of each color component (2^[RGBA]loss)
[RGBA]shift Binary left shift of each color component in the pixel value
colorkey Pixel value of transparent pixels
alpha Overall surface alpha value
DESCRIPTION
A SDL_PixelFormat describes the format of the pixel data stored at the pixels field of a SDL_Surface. Every surface stores a SDL_PixelFor-
mat in the format field.
If you wish to do pixel level modifications on a surface, then understanding how SDL stores its color information is essential.
8-bit pixel formats are the easiest to understand. Since its an 8-bit format, we have 8 BitsPerPixel and 1 BytesPerPixel. Since BytesPer-
Pixel is 1, all pixels are represented by a Uint8 which contains an index into palette->colors. So, to determine the color of a pixel in a
8-bit surface: we read the color index from surface->pixels and we use that index to read the SDL_Color structure from surface->for-
mat->palette->colors. Like so:
SDL_Surface *surface;
SDL_PixelFormat *fmt;
SDL_Color *color;
Uint8 index;
.
.
/* Create surface */
.
.
fmt=surface->format;
/* Check the bitdepth of the surface */
if(fmt->BitsPerPixel!=8){
fprintf(stderr, "Not an 8-bit surface.
");
return(-1);
}
/* Lock the surface */
SDL_LockSurface(surface);
/* Get the topleft pixel */
index=*(Uint8 *)surface->pixels;
color=fmt->palette->colors[index];
/* Unlock the surface */
SDL_UnlockSurface(surface);
printf("Pixel Color-> Red: %d, Green: %d, Blue: %d. Index: %d
",
color->r, color->g, color->b, index);
.
.
Pixel formats above 8-bit are an entirely different experience. They are considered to be "TrueColor" formats and the color information is
stored in the pixels themselves, not in a palette. The mask, shift and loss fields tell us how the color information is encoded. The mask
fields allow us to isolate each color component, the shift fields tell us the number of bits to the right of each component in the pixel
value and the loss fields tell us the number of bits lost from each component when packing 8-bit color component in a pixel.
/* Extracting color components from a 32-bit color value */
SDL_PixelFormat *fmt;
SDL_Surface *surface;
Uint32 temp, pixel;
Uint8 red, green, blue, alpha;
.
.
.
fmt=surface->format;
SDL_LockSurface(surface);
pixel=*((Uint32*)surface->pixels);
SDL_UnlockSurface(surface);
/* Get Red component */
temp=pixel&fmt->Rmask; /* Isolate red component */
temp=temp>>fmt->Rshift;/* Shift it down to 8-bit */
temp=temp<<fmt->Rloss; /* Expand to a full 8-bit number */
red=(Uint8)temp;
/* Get Green component */
temp=pixel&fmt->Gmask; /* Isolate green component */
temp=temp>>fmt->Gshift;/* Shift it down to 8-bit */
temp=temp<<fmt->Gloss; /* Expand to a full 8-bit number */
green=(Uint8)temp;
/* Get Blue component */
temp=pixel&fmt->Bmask; /* Isolate blue component */
temp=temp>>fmt->Bshift;/* Shift it down to 8-bit */
temp=temp<<fmt->Bloss; /* Expand to a full 8-bit number */
blue=(Uint8)temp;
/* Get Alpha component */
temp=pixel&fmt->Amask; /* Isolate alpha component */
temp=temp>>fmt->Ashift;/* Shift it down to 8-bit */
temp=temp<<fmt->Aloss; /* Expand to a full 8-bit number */
alpha=(Uint8)temp;
printf("Pixel Color -> R: %d, G: %d, B: %d, A: %d
", red, green, blue, alpha);
.
.
.
SEE ALSO
SDL_Surface, SDL_MapRGB
SDL Tue 11 Sep 2001, 23:01 SDL_PixelFormat(3)