src/events/SDL_mouse.c
author Ryan C. Gordon <icculus@icculus.org>
Sat, 24 May 2014 01:27:19 -0400
changeset 8783 400f1d2b9e52
parent 8776 29aac8b813d9
child 8815 c6d0a457f3b2
child 8927 be64f5daf64b
permissions -rw-r--r--
Added some FIXMEs.
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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
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  This software is provided 'as-is', without any express or implied
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  warranty.  In no event will the authors be held liable for any damages
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  arising from the use of this software.
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  Permission is granted to anyone to use this software for any purpose,
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  including commercial applications, and to alter it and redistribute it
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  freely, subject to the following restrictions:
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  1. The origin of this software must not be misrepresented; you must not
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     claim that you wrote the original software. If you use this software
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     in a product, an acknowledgment in the product documentation would be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../SDL_internal.h"
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/* General mouse handling code for SDL */
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#include "SDL_assert.h"
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#include "SDL_hints.h"
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#include "SDL_timer.h"
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#include "SDL_events.h"
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#include "SDL_events_c.h"
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#include "default_cursor.h"
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#include "../video/SDL_sysvideo.h"
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/* #define DEBUG_MOUSE */
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/* The mouse state */
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static SDL_Mouse SDL_mouse;
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static Uint32 SDL_double_click_time = 500;
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static int SDL_double_click_radius = 1;
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static int
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SDL_PrivateSendMouseMotion(SDL_Window * window, SDL_MouseID mouseID, int relative, int x, int y);
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/* Public functions */
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int
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SDL_MouseInit(void)
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{
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    SDL_Mouse *mouse = SDL_GetMouse();
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    mouse->cursor_shown = SDL_TRUE;
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    return (0);
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}
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void
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SDL_SetDefaultCursor(SDL_Cursor * cursor)
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{
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    SDL_Mouse *mouse = SDL_GetMouse();
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    mouse->def_cursor = cursor;
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    if (!mouse->cur_cursor) {
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        SDL_SetCursor(cursor);
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    }
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}
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SDL_Mouse *
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SDL_GetMouse(void)
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{
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    return &SDL_mouse;
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}
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void
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SDL_SetDoubleClickTime(Uint32 interval)
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{
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    SDL_double_click_time = interval;
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}
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SDL_Window *
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SDL_GetMouseFocus(void)
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{
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    SDL_Mouse *mouse = SDL_GetMouse();
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    return mouse->focus;
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}
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void
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SDL_ResetMouse(void)
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{
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    SDL_Mouse *mouse = SDL_GetMouse();
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    Uint8 i;
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#ifdef DEBUG_MOUSE
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    printf("Resetting mouse\n");
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#endif
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    for (i = 1; i <= sizeof(mouse->buttonstate)*8; ++i) {
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        if (mouse->buttonstate & SDL_BUTTON(i)) {
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            SDL_SendMouseButton(mouse->focus, mouse->mouseID, SDL_RELEASED, i);
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        }
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    }
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    SDL_assert(mouse->buttonstate == 0);
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}
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void
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SDL_SetMouseFocus(SDL_Window * window)
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{
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    SDL_Mouse *mouse = SDL_GetMouse();
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    if (mouse->focus == window) {
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        return;
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    }
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    /* Actually, this ends up being a bad idea, because most operating
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       systems have an implicit grab when you press the mouse button down
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       so you can drag things out of the window and then get the mouse up
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       when it happens.  So, #if 0...
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    */
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#if 0
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    if (mouse->focus && !window) {
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        /* We won't get anymore mouse messages, so reset mouse state */
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        SDL_ResetMouse();
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    }
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#endif
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    /* See if the current window has lost focus */
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    if (mouse->focus) {
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        SDL_SendWindowEvent(mouse->focus, SDL_WINDOWEVENT_LEAVE, 0, 0);
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    }
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    mouse->focus = window;
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    if (mouse->focus) {
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        SDL_SendWindowEvent(mouse->focus, SDL_WINDOWEVENT_ENTER, 0, 0);
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    }
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    /* Update cursor visibility */
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    SDL_SetCursor(NULL);
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}
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/* Check to see if we need to synthesize focus events */
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static SDL_bool
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SDL_UpdateMouseFocus(SDL_Window * window, int x, int y, Uint32 buttonstate)
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{
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    SDL_Mouse *mouse = SDL_GetMouse();
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    int w, h;
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    SDL_bool inWindow;
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    SDL_GetWindowSize(window, &w, &h);
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    if (x < 0 || y < 0 || x >= w || y >= h) {
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        inWindow = SDL_FALSE;
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    } else {
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        inWindow = SDL_TRUE;
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    }
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/* Linux doesn't give you mouse events outside your window unless you grab
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   the pointer.
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   Windows doesn't give you mouse events outside your window unless you call
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   SetCapture().
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   Both of these are slightly scary changes, so for now we'll punt and if the
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   mouse leaves the window you'll lose mouse focus and reset button state.
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*/
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#ifdef SUPPORT_DRAG_OUTSIDE_WINDOW
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    if (!inWindow && !buttonstate) {
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#else
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    if (!inWindow) {
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#endif
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        if (window == mouse->focus) {
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#ifdef DEBUG_MOUSE
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            printf("Mouse left window, synthesizing move & focus lost event\n");
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#endif
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            SDL_PrivateSendMouseMotion(window, mouse->mouseID, 0, x, y);
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            SDL_SetMouseFocus(NULL);
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        }
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        return SDL_FALSE;
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    }
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    if (window != mouse->focus) {
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#ifdef DEBUG_MOUSE
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         printf("Mouse entered window, synthesizing focus gain & move event\n");
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#endif
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         SDL_SetMouseFocus(window);
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         SDL_PrivateSendMouseMotion(window, mouse->mouseID, 0, x, y);
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    }
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    return SDL_TRUE;
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}
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int
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SDL_SendMouseMotion(SDL_Window * window, SDL_MouseID mouseID, int relative, int x, int y)
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{
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    if (window && !relative) {
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        SDL_Mouse *mouse = SDL_GetMouse();
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        if (!SDL_UpdateMouseFocus(window, x, y, mouse->buttonstate)) {
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            return 0;
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        }
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    }
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    return SDL_PrivateSendMouseMotion(window, mouseID, relative, x, y);
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}
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static int
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SDL_PrivateSendMouseMotion(SDL_Window * window, SDL_MouseID mouseID, int relative, int x, int y)
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{
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    SDL_Mouse *mouse = SDL_GetMouse();
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    int posted;
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    int xrel;
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    int yrel;
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    int x_max = 0, y_max = 0;
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    if (mouse->relative_mode_warp) {
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        int center_x = 0, center_y = 0;
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        SDL_GetWindowSize(window, &center_x, &center_y);
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        center_x /= 2;
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        center_y /= 2;
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        if (x == center_x && y == center_y) {
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            mouse->last_x = center_x;
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            mouse->last_y = center_y;
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            return 0;
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        }
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        SDL_WarpMouseInWindow(window, center_x, center_y);
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    }
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    if (relative) {
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        xrel = x;
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        yrel = y;
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        x = (mouse->last_x + xrel);
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        y = (mouse->last_y + yrel);
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    } else {
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        xrel = x - mouse->last_x;
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        yrel = y - mouse->last_y;
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    }
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    /* Drop events that don't change state */
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    if (!xrel && !yrel) {
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#ifdef DEBUG_MOUSE
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        printf("Mouse event didn't change state - dropped!\n");
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#endif
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        return 0;
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    }
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    /* Update internal mouse coordinates */
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    if (!mouse->relative_mode) {
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        mouse->x = x;
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        mouse->y = y;
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    } else {
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        mouse->x += xrel;
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        mouse->y += yrel;
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    }
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    /* !!! FIXME: shouldn't this be (window) instead of (mouse->focus)? */
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    SDL_GetWindowSize(mouse->focus, &x_max, &y_max);
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    --x_max;
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    --y_max;
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    /* make sure that the pointers find themselves inside the windows */
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    if (mouse->x > x_max) {
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        mouse->x = x_max;
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    }
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    if (mouse->x < 0) {
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        mouse->x = 0;
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    }
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    if (mouse->y > y_max) {
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        mouse->y = y_max;
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    }
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    if (mouse->y < 0) {
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        mouse->y = 0;
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    }
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    mouse->xdelta += xrel;
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    mouse->ydelta += yrel;
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    /* Move the mouse cursor, if needed */
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    if (mouse->cursor_shown && !mouse->relative_mode &&
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        mouse->MoveCursor && mouse->cur_cursor) {
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        mouse->MoveCursor(mouse->cur_cursor);
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    }
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    /* Post the event, if desired */
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    posted = 0;
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    if (SDL_GetEventState(SDL_MOUSEMOTION) == SDL_ENABLE) {
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        SDL_Event event;
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        event.motion.type = SDL_MOUSEMOTION;
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        event.motion.windowID = mouse->focus ? mouse->focus->id : 0;
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        event.motion.which = mouseID;
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        event.motion.state = mouse->buttonstate;
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        event.motion.x = mouse->x;
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        event.motion.y = mouse->y;
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        event.motion.xrel = xrel;
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        event.motion.yrel = yrel;
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        posted = (SDL_PushEvent(&event) > 0);
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    }
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    /* Use unclamped values if we're getting events outside the window */
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    mouse->last_x = x;
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    mouse->last_y = y;
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    return posted;
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}
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static SDL_MouseClickState *GetMouseClickState(SDL_Mouse *mouse, Uint8 button)
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{
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    if (button >= mouse->num_clickstates) {
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        int i, count = button + 1;
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        mouse->clickstate = (SDL_MouseClickState *)SDL_realloc(mouse->clickstate, count * sizeof(*mouse->clickstate));
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        if (!mouse->clickstate) {
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            return NULL;
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        }
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        for (i = mouse->num_clickstates; i < count; ++i) {
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            SDL_zero(mouse->clickstate[i]);
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        }
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        mouse->num_clickstates = count;
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    }
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    return &mouse->clickstate[button];
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}
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int
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SDL_SendMouseButton(SDL_Window * window, SDL_MouseID mouseID, Uint8 state, Uint8 button)
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{
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    SDL_Mouse *mouse = SDL_GetMouse();
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    int posted;
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    Uint32 type;
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    Uint32 buttonstate = mouse->buttonstate;
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    SDL_MouseClickState *clickstate = GetMouseClickState(mouse, button);
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    Uint8 click_count;
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    /* Figure out which event to perform */
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    switch (state) {
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    case SDL_PRESSED:
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        type = SDL_MOUSEBUTTONDOWN;
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        buttonstate |= SDL_BUTTON(button);
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        break;
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    case SDL_RELEASED:
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        type = SDL_MOUSEBUTTONUP;
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        buttonstate &= ~SDL_BUTTON(button);
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        break;
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    default:
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        /* Invalid state -- bail */
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        return 0;
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    }
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    /* We do this after calculating buttonstate so button presses gain focus */
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    if (window && state == SDL_PRESSED) {
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        SDL_UpdateMouseFocus(window, mouse->x, mouse->y, buttonstate);
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    }
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    if (buttonstate == mouse->buttonstate) {
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        /* Ignore this event, no state change */
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        return 0;
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    }
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    mouse->buttonstate = buttonstate;
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    if (clickstate) {
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        if (state == SDL_PRESSED) {
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            Uint32 now = SDL_GetTicks();
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            if (SDL_TICKS_PASSED(now, clickstate->last_timestamp + SDL_double_click_time) ||
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                SDL_abs(mouse->x - clickstate->last_x) > SDL_double_click_radius ||
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                SDL_abs(mouse->y - clickstate->last_y) > SDL_double_click_radius) {
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                clickstate->click_count = 0;
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            }
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            clickstate->last_timestamp = now;
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            clickstate->last_x = mouse->x;
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            clickstate->last_y = mouse->y;
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            if (clickstate->click_count < 255) {
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                ++clickstate->click_count;
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            }
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        }
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        click_count = clickstate->click_count;
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    } else {
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        click_count = 1;
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    }
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    /* Post the event, if desired */
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    posted = 0;
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    if (SDL_GetEventState(type) == SDL_ENABLE) {
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        SDL_Event event;
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        event.type = type;
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        event.button.windowID = mouse->focus ? mouse->focus->id : 0;
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        event.button.which = mouseID;
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        event.button.state = state;
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        event.button.button = button;
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        event.button.clicks = click_count;
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        event.button.x = mouse->x;
slouken@1895
   383
        event.button.y = mouse->y;
slouken@1895
   384
        posted = (SDL_PushEvent(&event) > 0);
slouken@1895
   385
    }
slouken@6666
   386
slouken@6666
   387
    /* We do this after dispatching event so button releases can lose focus */
slouken@6666
   388
    if (window && state == SDL_RELEASED) {
slouken@6666
   389
        SDL_UpdateMouseFocus(window, mouse->x, mouse->y, buttonstate);
slouken@6666
   390
    }
slouken@6666
   391
slouken@1895
   392
    return posted;
slouken@1895
   393
}
slouken@1895
   394
slouken@1895
   395
int
slouken@6950
   396
SDL_SendMouseWheel(SDL_Window * window, SDL_MouseID mouseID, int x, int y)
slouken@1895
   397
{
slouken@5371
   398
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@1895
   399
    int posted;
slouken@1895
   400
slouken@4484
   401
    if (window) {
slouken@4484
   402
        SDL_SetMouseFocus(window);
slouken@4484
   403
    }
slouken@4484
   404
slouken@4465
   405
    if (!x && !y) {
slouken@1895
   406
        return 0;
slouken@1895
   407
    }
slouken@1895
   408
slouken@1895
   409
    /* Post the event, if desired */
slouken@1895
   410
    posted = 0;
slouken@4429
   411
    if (SDL_GetEventState(SDL_MOUSEWHEEL) == SDL_ENABLE) {
slouken@1895
   412
        SDL_Event event;
slouken@1895
   413
        event.type = SDL_MOUSEWHEEL;
slouken@4465
   414
        event.wheel.windowID = mouse->focus ? mouse->focus->id : 0;
slouken@6950
   415
        event.wheel.which = mouseID;
slouken@2152
   416
        event.wheel.x = x;
slouken@2152
   417
        event.wheel.y = y;
slouken@1895
   418
        posted = (SDL_PushEvent(&event) > 0);
slouken@1895
   419
    }
slouken@1895
   420
    return posted;
slouken@1895
   421
}
slouken@1895
   422
slouken@1895
   423
void
slouken@4465
   424
SDL_MouseQuit(void)
slouken@4465
   425
{
slouken@7493
   426
    SDL_Cursor *cursor, *next;
slouken@7493
   427
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@7493
   428
slouken@8049
   429
    SDL_SetRelativeMouseMode(SDL_FALSE);
slouken@7493
   430
    SDL_ShowCursor(1);
slouken@7493
   431
slouken@7493
   432
    cursor = mouse->cursors;
slouken@7493
   433
    while (cursor) {
slouken@7493
   434
        next = cursor->next;
slouken@7493
   435
        SDL_FreeCursor(cursor);
slouken@7493
   436
        cursor = next;
slouken@7493
   437
    }
slouken@7493
   438
slouken@7493
   439
    if (mouse->def_cursor && mouse->FreeCursor) {
slouken@7493
   440
        mouse->FreeCursor(mouse->def_cursor);
slouken@7493
   441
    }
slouken@7493
   442
slouken@8066
   443
    if (mouse->clickstate) {
slouken@8066
   444
        SDL_free(mouse->clickstate);
slouken@8066
   445
    }
slouken@8066
   446
slouken@7493
   447
    SDL_zerop(mouse);
slouken@4465
   448
}
slouken@4465
   449
slouken@6673
   450
Uint32
slouken@4465
   451
SDL_GetMouseState(int *x, int *y)
slouken@4465
   452
{
slouken@5371
   453
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@4465
   454
slouken@4465
   455
    if (x) {
slouken@4465
   456
        *x = mouse->x;
slouken@4465
   457
    }
slouken@4465
   458
    if (y) {
slouken@4465
   459
        *y = mouse->y;
slouken@4465
   460
    }
slouken@4465
   461
    return mouse->buttonstate;
slouken@4465
   462
}
slouken@4465
   463
slouken@6673
   464
Uint32
slouken@4465
   465
SDL_GetRelativeMouseState(int *x, int *y)
slouken@4465
   466
{
slouken@5371
   467
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@4465
   468
slouken@4465
   469
    if (x) {
slouken@4465
   470
        *x = mouse->xdelta;
slouken@4465
   471
    }
slouken@4465
   472
    if (y) {
slouken@4465
   473
        *y = mouse->ydelta;
slouken@4465
   474
    }
slouken@4465
   475
    mouse->xdelta = 0;
slouken@4465
   476
    mouse->ydelta = 0;
slouken@4465
   477
    return mouse->buttonstate;
slouken@4465
   478
}
slouken@4465
   479
slouken@4465
   480
void
slouken@3685
   481
SDL_WarpMouseInWindow(SDL_Window * window, int x, int y)
slouken@1895
   482
{
slouken@5371
   483
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@7191
   484
slouken@7191
   485
    if ( window == NULL )
slouken@7191
   486
        window = mouse->focus;
slouken@7191
   487
slouken@7191
   488
    if ( window == NULL )
slouken@7191
   489
        return;
slouken@1895
   490
slouken@1895
   491
    if (mouse->WarpMouse) {
slouken@5371
   492
        mouse->WarpMouse(window, x, y);
slouken@1895
   493
    } else {
slouken@6950
   494
        SDL_SendMouseMotion(window, mouse->mouseID, 0, x, y);
slouken@1895
   495
    }
slouken@1895
   496
}
slouken@1895
   497
slouken@8071
   498
static SDL_bool
slouken@8071
   499
ShouldUseRelativeModeWarp(SDL_Mouse *mouse)
slouken@8071
   500
{
slouken@8071
   501
    const char *hint;
slouken@8071
   502
slouken@8071
   503
    if (!mouse->SetRelativeMouseMode) {
slouken@8071
   504
        return SDL_TRUE;
slouken@8071
   505
    }
slouken@8071
   506
slouken@8071
   507
    hint = SDL_GetHint(SDL_HINT_MOUSE_RELATIVE_MODE_WARP);
slouken@8071
   508
    if (hint) {
slouken@8071
   509
        if (*hint == '0') {
slouken@8071
   510
            return SDL_FALSE;
slouken@8071
   511
        } else {
slouken@8071
   512
            return SDL_TRUE;
slouken@8071
   513
        }
slouken@8071
   514
    }
slouken@8071
   515
    return SDL_FALSE;
slouken@8071
   516
}
slouken@8071
   517
slouken@4465
   518
int
slouken@4465
   519
SDL_SetRelativeMouseMode(SDL_bool enabled)
slouken@4465
   520
{
slouken@5371
   521
    SDL_Mouse *mouse = SDL_GetMouse();
jorgen@7107
   522
    SDL_Window *focusWindow = SDL_GetKeyboardFocus();
slouken@4465
   523
slouken@5406
   524
    if (enabled == mouse->relative_mode) {
slouken@5406
   525
        return 0;
slouken@5406
   526
    }
slouken@5406
   527
jorgen@7107
   528
    if (enabled && focusWindow) {
jorgen@7107
   529
        /* Center it in the focused window to prevent clicks from going through
jorgen@7107
   530
         * to background windows.
jorgen@7107
   531
         */
jorgen@7107
   532
        SDL_SetMouseFocus(focusWindow);
jorgen@7107
   533
        SDL_WarpMouseInWindow(focusWindow, focusWindow->w/2, focusWindow->h/2);
jorgen@7107
   534
    }
jorgen@7107
   535
slouken@8071
   536
    /* Set the relative mode */
slouken@8071
   537
    if (!enabled && mouse->relative_mode_warp) {
slouken@8071
   538
        mouse->relative_mode_warp = SDL_FALSE;
slouken@8071
   539
    } else if (enabled && ShouldUseRelativeModeWarp(mouse)) {
slouken@8071
   540
        mouse->relative_mode_warp = SDL_TRUE;
slouken@8071
   541
    } else if (mouse->SetRelativeMouseMode(enabled) < 0) {
slouken@8269
   542
        if (enabled) {
philipp@8776
   543
            /* Fall back to warp mode if native relative mode failed */
slouken@8269
   544
            mouse->relative_mode_warp = SDL_TRUE;
slouken@8269
   545
        }
slouken@5406
   546
    }
slouken@4465
   547
    mouse->relative_mode = enabled;
slouken@4465
   548
slouken@8071
   549
    if (mouse->focus) {
slouken@8071
   550
        SDL_UpdateWindowGrab(mouse->focus);
slouken@8071
   551
slouken@8071
   552
        /* Put the cursor back to where the application expects it */
slouken@8071
   553
        if (!enabled) {
slouken@8071
   554
            SDL_WarpMouseInWindow(mouse->focus, mouse->x, mouse->y);
slouken@8071
   555
        }
slouken@4465
   556
    }
slouken@4465
   557
slouken@8071
   558
    /* Flush pending mouse motion - ideally we would pump events, but that's not always safe */
slouken@5406
   559
    SDL_FlushEvent(SDL_MOUSEMOTION);
slouken@5406
   560
slouken@4465
   561
    /* Update cursor visibility */
slouken@4465
   562
    SDL_SetCursor(NULL);
slouken@4465
   563
slouken@4465
   564
    return 0;
slouken@4465
   565
}
slouken@4465
   566
slouken@4465
   567
SDL_bool
slouken@4465
   568
SDL_GetRelativeMouseMode()
slouken@4465
   569
{
slouken@5371
   570
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@4465
   571
slouken@4465
   572
    return mouse->relative_mode;
slouken@4465
   573
}
slouken@4465
   574
slouken@1895
   575
SDL_Cursor *
slouken@1895
   576
SDL_CreateCursor(const Uint8 * data, const Uint8 * mask,
slouken@1895
   577
                 int w, int h, int hot_x, int hot_y)
slouken@1895
   578
{
slouken@1895
   579
    SDL_Surface *surface;
slouken@1895
   580
    SDL_Cursor *cursor;
slouken@1895
   581
    int x, y;
slouken@1895
   582
    Uint32 *pixel;
slouken@4465
   583
    Uint8 datab = 0, maskb = 0;
slouken@1895
   584
    const Uint32 black = 0xFF000000;
slouken@1895
   585
    const Uint32 white = 0xFFFFFFFF;
slouken@1895
   586
    const Uint32 transparent = 0x00000000;
slouken@1895
   587
slouken@1895
   588
    /* Make sure the width is a multiple of 8 */
slouken@1895
   589
    w = ((w + 7) & ~7);
slouken@1895
   590
slouken@1895
   591
    /* Create the surface from a bitmap */
slouken@5473
   592
    surface = SDL_CreateRGBSurface(0, w, h, 32,
slouken@5473
   593
                                   0x00FF0000,
slouken@5473
   594
                                   0x0000FF00,
slouken@5473
   595
                                   0x000000FF,
slouken@5473
   596
                                   0xFF000000);
slouken@1895
   597
    if (!surface) {
slouken@1895
   598
        return NULL;
slouken@1895
   599
    }
slouken@1895
   600
    for (y = 0; y < h; ++y) {
slouken@1895
   601
        pixel = (Uint32 *) ((Uint8 *) surface->pixels + y * surface->pitch);
slouken@1895
   602
        for (x = 0; x < w; ++x) {
slouken@1895
   603
            if ((x % 8) == 0) {
slouken@1895
   604
                datab = *data++;
slouken@1895
   605
                maskb = *mask++;
slouken@1895
   606
            }
slouken@1895
   607
            if (maskb & 0x80) {
slouken@1895
   608
                *pixel++ = (datab & 0x80) ? black : white;
slouken@1895
   609
            } else {
slouken@1895
   610
                *pixel++ = (datab & 0x80) ? black : transparent;
slouken@1895
   611
            }
slouken@1895
   612
            datab <<= 1;
slouken@1895
   613
            maskb <<= 1;
slouken@1895
   614
        }
slouken@1895
   615
    }
slouken@1895
   616
slouken@5473
   617
    cursor = SDL_CreateColorCursor(surface, hot_x, hot_y);
slouken@5473
   618
slouken@5473
   619
    SDL_FreeSurface(surface);
slouken@5473
   620
slouken@5473
   621
    return cursor;
slouken@5473
   622
}
slouken@5473
   623
slouken@5473
   624
SDL_Cursor *
slouken@5473
   625
SDL_CreateColorCursor(SDL_Surface *surface, int hot_x, int hot_y)
slouken@5473
   626
{
slouken@5473
   627
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@5473
   628
    SDL_Surface *temp = NULL;
slouken@5473
   629
    SDL_Cursor *cursor;
slouken@5473
   630
slouken@5473
   631
    if (!surface) {
slouken@5473
   632
        SDL_SetError("Passed NULL cursor surface");
slouken@5473
   633
        return NULL;
slouken@5473
   634
    }
slouken@5473
   635
slouken@5473
   636
    if (!mouse->CreateCursor) {
slouken@5473
   637
        SDL_SetError("Cursors are not currently supported");
slouken@5473
   638
        return NULL;
slouken@5473
   639
    }
slouken@5473
   640
slouken@5473
   641
    /* Sanity check the hot spot */
slouken@5473
   642
    if ((hot_x < 0) || (hot_y < 0) ||
slouken@5473
   643
        (hot_x >= surface->w) || (hot_y >= surface->h)) {
slouken@5473
   644
        SDL_SetError("Cursor hot spot doesn't lie within cursor");
slouken@5473
   645
        return NULL;
slouken@5473
   646
    }
slouken@5473
   647
slouken@5473
   648
    if (surface->format->format != SDL_PIXELFORMAT_ARGB8888) {
slouken@5473
   649
        temp = SDL_ConvertSurfaceFormat(surface, SDL_PIXELFORMAT_ARGB8888, 0);
slouken@5473
   650
        if (!temp) {
slouken@5473
   651
            return NULL;
slouken@5473
   652
        }
slouken@5473
   653
        surface = temp;
slouken@5473
   654
    }
slouken@5473
   655
slouken@1895
   656
    cursor = mouse->CreateCursor(surface, hot_x, hot_y);
slouken@1895
   657
    if (cursor) {
slouken@1895
   658
        cursor->next = mouse->cursors;
slouken@1895
   659
        mouse->cursors = cursor;
slouken@1895
   660
    }
slouken@1895
   661
slouken@7720
   662
    SDL_FreeSurface(temp);
slouken@1895
   663
slouken@1895
   664
    return cursor;
slouken@1895
   665
}
slouken@1895
   666
mikesart@6675
   667
SDL_Cursor *
mikesart@6675
   668
SDL_CreateSystemCursor(SDL_SystemCursor id)
mikesart@6675
   669
{
mikesart@6675
   670
    SDL_Mouse *mouse = SDL_GetMouse();
mikesart@6675
   671
    SDL_Cursor *cursor;
mikesart@6675
   672
mikesart@6675
   673
    if (!mouse->CreateSystemCursor) {
mikesart@6675
   674
        SDL_SetError("CreateSystemCursor is not currently supported");
mikesart@6675
   675
        return NULL;
mikesart@6675
   676
    }
mikesart@6675
   677
slouken@7191
   678
    cursor = mouse->CreateSystemCursor(id);
mikesart@6675
   679
    if (cursor) {
mikesart@6675
   680
        cursor->next = mouse->cursors;
mikesart@6675
   681
        mouse->cursors = cursor;
mikesart@6675
   682
    }
mikesart@6675
   683
slouken@7191
   684
    return cursor;
mikesart@6675
   685
}
mikesart@6675
   686
slouken@1895
   687
/* SDL_SetCursor(NULL) can be used to force the cursor redraw,
slouken@1895
   688
   if this is desired for any reason.  This is used when setting
slouken@1895
   689
   the video mode and when the SDL window gains the mouse focus.
slouken@1895
   690
 */
slouken@1895
   691
void
slouken@1895
   692
SDL_SetCursor(SDL_Cursor * cursor)
slouken@1895
   693
{
slouken@5371
   694
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@1895
   695
slouken@1895
   696
    /* Set the new cursor */
slouken@1895
   697
    if (cursor) {
slouken@1895
   698
        /* Make sure the cursor is still valid for this mouse */
slouken@5405
   699
        if (cursor != mouse->def_cursor) {
slouken@5405
   700
            SDL_Cursor *found;
slouken@5405
   701
            for (found = mouse->cursors; found; found = found->next) {
slouken@5405
   702
                if (found == cursor) {
slouken@5405
   703
                    break;
slouken@5405
   704
                }
slouken@1895
   705
            }
slouken@5405
   706
            if (!found) {
slouken@5405
   707
                SDL_SetError("Cursor not associated with the current mouse");
slouken@5405
   708
                return;
slouken@5405
   709
            }
slouken@1895
   710
        }
slouken@1895
   711
        mouse->cur_cursor = cursor;
slouken@1895
   712
    } else {
ghostunderscore@6301
   713
        if (mouse->focus) {
ghostunderscore@6301
   714
            cursor = mouse->cur_cursor;
ghostunderscore@6301
   715
        } else {
ghostunderscore@6301
   716
            cursor = mouse->def_cursor;
ghostunderscore@6301
   717
        }
slouken@1895
   718
    }
slouken@1895
   719
slouken@1895
   720
    if (cursor && mouse->cursor_shown && !mouse->relative_mode) {
slouken@1895
   721
        if (mouse->ShowCursor) {
slouken@1895
   722
            mouse->ShowCursor(cursor);
slouken@1895
   723
        }
slouken@1895
   724
    } else {
slouken@1895
   725
        if (mouse->ShowCursor) {
slouken@1895
   726
            mouse->ShowCursor(NULL);
slouken@1895
   727
        }
slouken@1895
   728
    }
slouken@1895
   729
}
slouken@1895
   730
slouken@1895
   731
SDL_Cursor *
slouken@1895
   732
SDL_GetCursor(void)
slouken@1895
   733
{
slouken@5371
   734
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@1895
   735
slouken@1895
   736
    if (!mouse) {
slouken@1895
   737
        return NULL;
slouken@1895
   738
    }
slouken@1895
   739
    return mouse->cur_cursor;
slouken@1895
   740
}
slouken@1895
   741
jorgen@7104
   742
SDL_Cursor *
jorgen@7104
   743
SDL_GetDefaultCursor(void)
jorgen@7104
   744
{
jorgen@7104
   745
    SDL_Mouse *mouse = SDL_GetMouse();
jorgen@7104
   746
jorgen@7104
   747
    if (!mouse) {
jorgen@7104
   748
        return NULL;
jorgen@7104
   749
    }
jorgen@7104
   750
    return mouse->def_cursor;
jorgen@7104
   751
}
jorgen@7104
   752
slouken@1895
   753
void
slouken@1895
   754
SDL_FreeCursor(SDL_Cursor * cursor)
slouken@1895
   755
{
slouken@5371
   756
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@1895
   757
    SDL_Cursor *curr, *prev;
slouken@1895
   758
slouken@1895
   759
    if (!cursor) {
slouken@1895
   760
        return;
slouken@1895
   761
    }
slouken@1895
   762
slouken@1895
   763
    if (cursor == mouse->def_cursor) {
slouken@1895
   764
        return;
slouken@1895
   765
    }
slouken@1895
   766
    if (cursor == mouse->cur_cursor) {
slouken@1895
   767
        SDL_SetCursor(mouse->def_cursor);
slouken@1895
   768
    }
slouken@1895
   769
slouken@1895
   770
    for (prev = NULL, curr = mouse->cursors; curr;
slouken@1895
   771
         prev = curr, curr = curr->next) {
slouken@1895
   772
        if (curr == cursor) {
slouken@1895
   773
            if (prev) {
slouken@1895
   774
                prev->next = curr->next;
slouken@1895
   775
            } else {
slouken@1895
   776
                mouse->cursors = curr->next;
slouken@1895
   777
            }
slouken@1895
   778
slouken@1895
   779
            if (mouse->FreeCursor) {
slouken@1895
   780
                mouse->FreeCursor(curr);
slouken@1895
   781
            }
slouken@1895
   782
            return;
slouken@1895
   783
        }
slouken@1895
   784
    }
slouken@1895
   785
}
slouken@1895
   786
slouken@1895
   787
int
slouken@1895
   788
SDL_ShowCursor(int toggle)
slouken@1895
   789
{
slouken@5371
   790
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@1895
   791
    SDL_bool shown;
slouken@1895
   792
slouken@1895
   793
    if (!mouse) {
slouken@1895
   794
        return 0;
slouken@1895
   795
    }
slouken@1895
   796
slouken@1895
   797
    shown = mouse->cursor_shown;
slouken@1895
   798
    if (toggle >= 0) {
slouken@1895
   799
        if (toggle) {
slouken@1895
   800
            mouse->cursor_shown = SDL_TRUE;
slouken@1895
   801
        } else {
slouken@1895
   802
            mouse->cursor_shown = SDL_FALSE;
slouken@1895
   803
        }
slouken@1895
   804
        if (mouse->cursor_shown != shown) {
slouken@1895
   805
            SDL_SetCursor(NULL);
slouken@1895
   806
        }
slouken@1895
   807
    }
slouken@1895
   808
    return shown;
slouken@1895
   809
}
slouken@1895
   810
jorgen@7097
   811
/* vi: set ts=4 sw=4 expandtab: */