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Man Pages


Manual Reference Pages  -  SDL_CREATECURSOR (3)

NAME

SDL_CreateCursor - Creates a new mouse cursor.

CONTENTS

SYNOPSIS

#include "SDL.h"

SDL_Cursor *SDL_CreateCursor(Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y);

DESCRIPTION

Create a cursor using the specified data and mask (in MSB format). The cursor width must be a multiple of 8 bits.

The cursor is created in black and white according to the following:
Data / Mask Resulting pixel on screen
0 / 1 White
1 / 1 Black
0 / 0 Transparent
1 / 0 Inverted color if possible, black if not.
Cursors created with this function must be freed with SDL_FreeCursor.

EXAMPLE

/* Stolen from the mailing list */
/* Creates a new mouse cursor from an XPM */

/* XPM */ static const char *arrow[] = { /* width height num_colors chars_per_pixel */ " 32 32 3 1", /* colors */ "X c #000000", ". c #ffffff", " c None", /* pixels */ "X ", "XX ", "X.X ", "X..X ", "X...X ", "X....X ", "X.....X ", "X......X ", "X.......X ", "X........X ", "X.....XXXXX ", "X..X..X ", "X.X X..X ", "XX X..X ", "X X..X ", " X..X ", " X..X ", " X..X ", " XX ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", " ", "0,0" };

static SDL_Cursor *init_system_cursor(const char *image[]) { int i, row, col; Uint8 data[4*32]; Uint8 mask[4*32]; int hot_x, hot_y;

i = -1; for ( row=0; row<32; ++row ) { for ( col=0; col<32; ++col ) { if ( col % 8 ) { data[i] <<= 1; mask[i] <<= 1; } else { ++i; data[i] = mask[i] = 0; } switch (image[4+row][col]) { case ’X’: data[i] |= 0x01; k[i] |= 0x01; break; case ’.’: mask[i] |= 0x01; break; case ’ ’: break; } } } sscanf(image[4+row], "%d,%d", &hot_x, &hot_y); return SDL_CreateCursor(data, mask, 32, 32, hot_x, hot_y); }

SEE ALSO

SDL_FreeCursor, SDL_SetCursor, SDL_ShowCursor

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SDL SDL_CREATECURSOR (3) Tue 11 Sep 2001, 23:01

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