Costava

// Sort of a benchmark --- if touching every pixel every frame,
//  a real program should not hope to get a higher frames per second
//  than this simple demo.
//
// Single process and thread
// Uses SDL_Surface (none of SDL_Texture)

#include <stdbool.h>
#include <stdio.h>
#include <stdint.h>

Costava

// FLTK GUI window with two sets of radio buttons
//
// COMPILE AND RUN:
/* g++ --output fltk_radio_button_groups -std=c++98 -Wall -g -lfltk \
fltk_radio_button_groups.cpp && ./fltk_radio_button_groups */
//
// Install FLTK through your package manager e.g. pamac install fltk
//
// Unfortunately, this compiles with 4 ugly warnings that
//  the button variables are unused (using g++ v10.2.0)

Costava

// The program reads stdin, counts the number of non-whitespace characters, and
//  then prints the count to stdout
// UTF-8 encoding is expected
// If a non-ASCII character is found, the program prints to stderr and exits,
//  but the program should be easy to extend to properly support UTF-8

// COMPILING:
// gcc -std=c99 -Wall --output countnonwhitespace countnonwhitespace.c

// USAGE:

Costava

// gcc -std=c99 -Wall --output cwrap cwrap.c && ./cwrap

#include <stdint.h>
#include <stdio.h>

int main(void)
{
	uint8_t val = 255;
	val += 1;
	printf("val: %d\n", val);// val: 0

Costava

// Writes a solid color P3 .ppm file to stdout
//  using the given width, height, and RGB color arguments

// Info on the .ppm file format:
// https://en.wikipedia.org/wiki/Netpbm#File_formats

// Compile:
// clang solidcolorppm.c --output solidcolorppm
// Run:
// ./solidcolorppm <width> <height> <r> <g> <b>

Costava

#lang racket/gui

(define frame (new frame% [label "Slider"]))

(new slider%
    [parent frame]
    [label "Volume"]
    [min-value 0]
    [max-value 100])

Costava

#lang racket/gui

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

; File: ray-demo.rkt
; Author: Costava
; License: zlib license (see end of file)

; Written for Racket 7.7
; Opens a window

Costava

// COMPILING:
// gcc -std=c99 -Wall --output uniquelines uniquelines.c

// USAGE:
// ./uniquelines path/to/file1 path/to/file2

// DESCRIPTION:
// Prints a list of the lines in file1 that are not in file2
//  and a list of the lines in file2 that are not in file1
// Within a file, lines are separated by a single-character `DELIMITER`

Costava

// If you try to read a 3-byte file for a 4-byte object,
// then you will read 0 objects and the file position indicator will be moved
// to the end of the file
//
// so you can reach end-of-file and possibly miss 1-3 bytes
// if you've been reading 4-byte objects

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

Costava

SDL 2.0.9

The title bar of a window is the bar that would have the minimize, maximize, and close buttons.

When you click the title bar of an SDL window to regain focus, the window may begin receiving keyboard events as expected but never mouse events (except for one mouse event at the time of the click).

How to reproduce problem:

1. Call SDL_SetRelativeMouseMode(SDL_TRUE)
2. Alt+tab away from the SDL window
3. Click the title bar of the SDL window