view test/testcursor.c @ 4593:3892fe2f6537

Fixed so many things. See the changelog listed below. 1. Use SDL_X11_HAVE_XRENDER to check for RENDER at runtime. 2. Added lots of comments. 3. Added checks and lots of calls to SDL_SetError(). 4. Fixed X11_CreateTexture() so that the pixmap and image created are for the format specified by the user and not the window format. This is only for the RENDER case. 5. The above change required that functions to convert SDL pixel format enums to Visuals and XRenderPictFormats be added. 6. Fixed lots of 'style' issues.
author Sunny Sachanandani <sunnysachanandani@gmail.com>
date Sat, 17 Jul 2010 15:38:24 +0530
parents 14d32495a502
children
line wrap: on
line source

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

#include "SDL.h"

/* This is an example 16x16 cursor
	top left :	black
	top right : inverted color or black
	bottom left: white
	bottom right: transparent
	(swap left and right for different endianness)
*/

Uint16 cursor_data[16] = {
    0xffff,
    0xffff,
    0xffff,
    0xffff,

    0xffff,
    0xffff,
    0xffff,
    0xffff,

    0x0000,
    0x0000,
    0x0000,
    0x0000,

    0x0000,
    0x0000,
    0x0000,
    0x0000
};

Uint16 cursor_mask[16] = {
    0xff00,
    0xff00,
    0xff00,
    0xff00,

    0xff00,
    0xff00,
    0xff00,
    0xff00,

    0xff00,
    0xff00,
    0xff00,
    0xff00,

    0xff00,
    0xff00,
    0xff00,
    0xff00
};

/* another test cursor: smaller than 16x16, and with an odd height */

Uint8 small_cursor_data[11] =
    { 0x00, 0x18, 0x08, 0x38, 0x44, 0x54, 0x44, 0x38, 0x20, 0x20, 0x00 };
Uint8 small_cursor_mask[11] =
    { 0x3C, 0x3C, 0x3C, 0x7C, 0xC6, 0xC6, 0xC6, 0x7C, 0x78, 0x70, 0x70 };

/* 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 *
create_arrow_cursor()
{
    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 (arrow[4 + row][col]) {
            case 'X':
                data[i] |= 0x01;
                mask[i] |= 0x01;
                break;
            case '.':
                mask[i] |= 0x01;
                break;
            case ' ':
                break;
            }
        }
    }
    sscanf(arrow[4 + row], "%d,%d", &hot_x, &hot_y);
    return SDL_CreateCursor(data, mask, 32, 32, hot_x, hot_y);
}


int
main(int argc, char *argv[])
{
    SDL_Surface *screen;
    SDL_bool quit = SDL_FALSE, first_time = SDL_TRUE;
    SDL_Cursor *cursor[3];
    int current;

    /* Load the SDL library */
    if (SDL_Init(SDL_INIT_VIDEO) < 0) {
        fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
        return (1);
    }

    screen = SDL_SetVideoMode(640, 480, 8, SDL_ANYFORMAT);
    if (screen == NULL) {
        fprintf(stderr, "Couldn't initialize video mode: %s\n",
                SDL_GetError());
        return (1);
    }

    SDL_FillRect(screen, NULL, 0x664422);

    cursor[0] = SDL_CreateCursor((Uint8 *) cursor_data, (Uint8 *) cursor_mask,
                                 16, 16, 8, 8);
    if (cursor[0] == NULL) {
        fprintf(stderr, "Couldn't initialize test cursor: %s\n",
                SDL_GetError());
        SDL_Quit();
        return (1);
    }
    cursor[1] = create_arrow_cursor();
    if (cursor[1] == NULL) {
        fprintf(stderr, "Couldn't initialize arrow cursor: %s\n",
                SDL_GetError());
        SDL_FreeCursor(cursor[0]);
        SDL_Quit();
        return (1);
    }
    cursor[2] = SDL_CreateCursor(small_cursor_data, small_cursor_mask,
                                 8, 11, 3, 5);
    if (cursor[2] == NULL) {
        fprintf(stderr, "Couldn't initialize test cursor: %s\n",
                SDL_GetError());
        SDL_Quit();
        return (1);
    }

    current = 0;
    SDL_SetCursor(cursor[current]);

    while (!quit) {
        SDL_Event event;
        while (SDL_PollEvent(&event)) {
            switch (event.type) {
            case SDL_MOUSEBUTTONDOWN:
                current = (current + 1) % 3;
                SDL_SetCursor(cursor[current]);
                break;
            case SDL_KEYDOWN:
                if (event.key.keysym.sym == SDLK_ESCAPE) {
                    quit = SDL_TRUE;
                }
                break;
            case SDL_QUIT:
                quit = SDL_TRUE;
                break;
            }
        }
        SDL_Flip(screen);
        SDL_Delay(1);
    }

    SDL_FreeCursor(cursor[0]);
    SDL_FreeCursor(cursor[1]);
    SDL_FreeCursor(cursor[2]);

    SDL_Quit();
    return (0);
}