section 3alleg4 · Library functions 📚

S (continued)

• show_video_bitmap(3alleg4)Flips the hardware screen to use the specified page. Allegro game programming library.✨
• shutdown_dialog(3alleg4)Destroys a dialog player returned by init_dialog(). Allegro game programming library.✨
• shutdown_menu(3alleg4)Destroys a menu player object returned by init_menu(). Allegro game programming library.✨
• simulate_keypress(3alleg4)Stuffs a key into the keyboard buffer. Allegro game programming library.✨
• simulate_ukeypress(3alleg4)Stuffs an unicode key into the keyboard buffer. Allegro game programming library.✨
• solid_mode(3alleg4)Shortcut for selecting solid drawing mode. Allegro game programming library.✨
• spline(3alleg4)Draws a Bezier spline using four control points. Allegro game programming library.✨
• start_sound_input(3alleg4)Starts recording in the specified format. Allegro game programming library.✨
• stop_audio_stream(3alleg4)Destroys an audio stream when it is no longer required. Allegro game programming library.✨
• stop_midi(3alleg4)Stops whatever music is currently playing. Allegro game programming library.✨
• stop_sample(3alleg4)Stops a sample from playing. Allegro game programming library.✨
• stop_sound_input(3alleg4)Stops audio recording. Allegro game programming library.✨
• stretch_blit(3alleg4)Scales a rectangular area from one bitmap to another. Allegro game programming library.✨
• stretch_sprite(3alleg4)Stretches a sprite to the destination bitmap. Allegro game programming library.✨

T

• text_height(3alleg4)Returns the height of a font in pixels. Allegro game programming library.✨
• text_length(3alleg4)Returns the length of a string in pixels. Allegro game programming library.✨
• textout_centre_ex(3alleg4)Writes a centered string on a bitmap. Allegro game programming library.✨
• textout_ex(3alleg4)Writes a string on a bitmap. Allegro game programming library.✨
• textout_justify_ex(3alleg4)Draws justified text within a region. Allegro game programming library.✨
• textout_right_ex(3alleg4)Writes a right aligned string on a bitmap. Allegro game programming library.✨
• textprintf_centre_ex(3alleg4)Formatted centered output of a string. Allegro game programming library.✨
• textprintf_ex(3alleg4)Formatted output of a string. Allegro game programming library.✨
• textprintf_justify_ex(3alleg4)Formatted justified output of a string. Allegro game programming library.✨
• textprintf_right_ex(3alleg4)Formatted right aligned output of a string. Allegro game programming library.✨
• three_finger_flag(3alleg4)Flag to deactivate the emergency exit key combination. Allegro game programming library.✨
• TRACE(3alleg4)Debugging helper macro to trace messages. Allegro game programming library.✨
• transpose_font(3alleg4)Transposes all characters in a font. Allegro game programming library.✨
• triangle(3alleg4)Draws a filled triangle. Allegro game programming library.✨
• triangle3d(3alleg4)Draws a 3d triangle onto the specified bitmap. Allegro game programming library.✨
• triangle3d_f(3alleg4)Draws a 3d triangle onto the specified bitmap. Allegro game programming library.✨

U

• uatof(3alleg4)Converts a string into a double. Allegro game programming library.✨
• uconvert(3alleg4)High level string encoding conversion wrapper. Allegro game programming library.✨
• uconvert_ascii(3alleg4)Converts string from ASCII into the current format. Allegro game programming library.✨
• uconvert_size(3alleg4)Number of bytes needed to store a string after conversion. Allegro game programming library.✨
• uconvert_toascii(3alleg4)Converts strings from the current format into ASCII. Allegro game programming library.✨
• ucwidth(3alleg4)Low level helper function for testing Unicode text data. Allegro game programming library.✨
• ugetat(3alleg4)Finds out the value of a character in a string. Allegro game programming library.✨
• ugetc(3alleg4)Low level helper function for reading Unicode text data. Allegro game programming library.✨
• ugetx(3alleg4)Low level helper function for reading Unicode text data. Allegro game programming library.✨
• ugetxc(3alleg4)Low level helper function for reading Unicode text data. Allegro game programming library.✨
• uinsert(3alleg4)Inserts a character in a string. Allegro game programming library.✨
• uisdigit(3alleg4)Tells if a character is a digit. Allegro game programming library.✨
• uisok(3alleg4)Low level helper function for testing Unicode text data. Allegro game programming library.✨
• uisspace(3alleg4)Tells if a character is whitespace. Allegro game programming library.✨
• unload_datafile(3alleg4)Frees all the objects in a datafile. Allegro game programming library.✨
• unload_datafile_object(3alleg4)Frees an object previously loaded by load_datafile_object(). Allegro game programming library.✨
• unscare_mouse(3alleg4)Undoes the effect of scare_mouse() or scare_mouse_area(). Allegro game programming library.✨
• unselect_palette(3alleg4)Restores the palette before last call to select_palette(). Allegro game programming library.✨
• uoffset(3alleg4)Finds the offset of a character in a string. Allegro game programming library.✨
• update_dialog(3alleg4)Low level function to update a dialog player. Allegro game programming library.✨
• update_menu(3alleg4)Low level function to update a menu player. Allegro game programming library.✨
• ureadkey(3alleg4)Returns the next unicode character from the keyboard buffer. Allegro game programming library.✨
• uremove(3alleg4)Removes a character from a string. Allegro game programming library.✨
• usetat(3alleg4)Replaces a character in a string. Allegro game programming library.✨
• usetc(3alleg4)Low level helper function for writing Unicode text data. Allegro game programming library.✨
• usprintf(3alleg4)Writes formatted data into a buffer. Allegro game programming library.✨
• ustrcat(3alleg4)Concatenates a string to another one. Allegro game programming library.✨
• ustrchr(3alleg4)Finds the first occurrence of a character in a string. Allegro game programming library.✨
• ustrcmp(3alleg4)Compares two strings. Allegro game programming library.✨
• ustrcpy(3alleg4)Copies a string into another one. Allegro game programming library.✨
• ustrdup(3alleg4)Duplicates a string. Allegro game programming library.✨
• ustrerror(3alleg4)Returns a string describing errno. Allegro game programming library.✨
• ustricmp(3alleg4)Compares two strings ignoring case. Allegro game programming library.✨
• ustrlen(3alleg4)Tells the number of characters in a string. Allegro game programming library.✨
• ustrlwr(3alleg4)Replaces all letters with lower case. Allegro game programming library.✨
• ustrncat(3alleg4)Concatenates a string to another one, specifying size. Allegro game programming library.✨
• ustrncmp(3alleg4)Compares up to n letters of two strings. Allegro game programming library.✨
• ustrncpy(3alleg4)Copies a string into another one, specifying size. Allegro game programming library.✨
• ustrnicmp(3alleg4)Compares up to n letters of two strings ignoring case. Allegro game programming library.✨
• ustrpbrk(3alleg4)Finds the first character that matches any in a set. Allegro game programming library.✨
• ustrrchr(3alleg4)Finds the last occurrence of a character in a string. Allegro game programming library.✨
• ustrsize(3alleg4)Size of the string in bytes without null terminator. Allegro game programming library.✨
• ustrsizez(3alleg4)Size of the string in bytes including null terminator. Allegro game programming library.✨
• ustrstr(3alleg4)Finds the first occurrence of a string in another one. Allegro game programming library.✨
• ustrtod(3alleg4)Converts a string into a floating point number. Allegro game programming library.✨
• ustrtok(3alleg4)Retrieves tokens from a string. Allegro game programming library.✨
• ustrtok_r(3alleg4)Reentrant function to retrieve tokens from a string. Allegro game programming library.✨
• ustrtol(3alleg4)Converts a string into an integer. Allegro game programming library.✨
• ustrupr(3alleg4)Replaces all letters with upper case. Allegro game programming library.✨
• ustrzcat(3alleg4)Concatenates a string to another one, specifying size. Allegro game programming library.✨
• ustrzcpy(3alleg4)Copies a string into another one, specifying size. Allegro game programming library.✨
• ustrzncat(3alleg4)Concatenates a string to another one, specifying size. Allegro game programming library.✨
• ustrzncpy(3alleg4)Copies a string into another one, specifying size. Allegro game programming library.✨
• uszprintf(3alleg4)Writes formatted data into a buffer, specifying size. Allegro game programming library.✨
• utolower(3alleg4)Converts a letter to lower case. Allegro game programming library.✨
• utoupper(3alleg4)Converts a letter to upper case. Allegro game programming library.✨
• uvsprintf(3alleg4)Writes formatted data into a buffer, using variable arguments. Allegro game programming library.✨
• uvszprintf(3alleg4)Writes formatted data into a buffer, using size and variable arguments. Allegro game programming library.✨
• uwidth(3alleg4)Low level helper function for testing Unicode text data. Allegro game programming library.✨
• uwidth_max(3alleg4)Number of bytes a character can occupy. Allegro game programming library.✨

V

• V3D(3alleg4)Fixed point vertex structure used by 3d functions. Allegro game programming library.✨
• V3D_f(3alleg4)Floating point vertex structure used by 3d functions. Allegro game programming library.✨
• vector_length(3alleg4)Calculates the length of a vector. Allegro game programming library.✨
• vector_length_f(3alleg4)Calculates the length of a vector. Allegro game programming library.✨
• VIRTUAL_H(3alleg4)Global define to obtain the virtual size of the screen. Allegro game programming library.✨
• VIRTUAL_W(3alleg4)Global define to obtain the virtual size of the screen. Allegro game programming library.✨
• vline(3alleg4)Draws a vertical line onto the bitmap. Allegro game programming library.✨
• voice_check(3alleg4)Checks whether a voice is currently allocated. Allegro game programming library.✨
• voice_get_frequency(3alleg4)Returns the current pitch of the voice. Allegro game programming library.✨
• voice_get_pan(3alleg4)Returns the current pan position. Allegro game programming library.✨
• voice_get_position(3alleg4)Returns the current position of a voice. Allegro game programming library.✨
• voice_get_volume(3alleg4)Returns the current volume of the voice. Allegro game programming library.✨
• voice_ramp_volume(3alleg4)Starts a volume ramp for a voice. Allegro game programming library.✨
• voice_set_echo(3alleg4)Sets the echo parameters for a voice. Allegro game programming library.✨
• voice_set_frequency(3alleg4)Sets the pitch of the voice. Allegro game programming library.✨
• voice_set_pan(3alleg4)Sets the pan position. Allegro game programming library.✨
• voice_set_playmode(3alleg4)Adjusts the loop status of the specified voice. Allegro game programming library.✨
• voice_set_position(3alleg4)Sets the position of a voice. Allegro game programming library.✨
• voice_set_priority(3alleg4)Sets the priority of a voice. Allegro game programming library.✨
• voice_set_tremolo(3alleg4)Sets the tremolo parameters for a voice. Allegro game programming library.✨
• voice_set_vibrato(3alleg4)Sets the vibrato parameters for a voice. Allegro game programming library.✨
• voice_set_volume(3alleg4)Sets the volume of the voice. Allegro game programming library.✨
• voice_start(3alleg4)Activates a voice. Allegro game programming library.✨
• voice_stop(3alleg4)Stops a voice. Allegro game programming library.✨
• voice_stop_frequency_sweep(3alleg4)Interrupts a frequency sweep operation. Allegro game programming library.✨
• voice_stop_pan_sweep(3alleg4)Interrupts a pan sweep operation. Allegro game programming library.✨
• voice_stop_volumeramp(3alleg4)Interrupts a volume ramp operation. Allegro game programming library.✨
• voice_sweep_frequency(3alleg4)Starts a frequency sweep for a voice. Allegro game programming library.✨
• voice_sweep_pan(3alleg4)Starts a pan sweep for a voice. Allegro game programming library.✨
• vsync(3alleg4)Waits for a vertical retrace to begin. Allegro game programming library.✨

X

• xor_mode(3alleg4)Shortcut for toggling xor drawing mode on and off. Allegro game programming library.✨
• xwin_set_window_name(3alleg4)Specify the window name and group (or class). Allegro game programming library.✨

Z

• ZBUFFER(3alleg4)Stores 3d zbuffer information. Allegro game programming library.✨