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SDL_DirectFB_mouse.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2009 Sam Lantinga
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This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#include "SDL_DirectFB_video.h"
#include "../SDL_sysvideo.h"
#include "../../events/SDL_mouse_c.h"
static SDL_Cursor *DirectFB_CreateCursor(SDL_Surface * surface, int hot_x,
int hot_y);
static int DirectFB_ShowCursor(SDL_Cursor * cursor);
static void DirectFB_MoveCursor(SDL_Cursor * cursor);
static void DirectFB_FreeCursor(SDL_Cursor * cursor);
static void DirectFB_WarpMouse(SDL_Mouse * mouse, SDL_WindowID windowID,
int x, int y);
static void DirectFB_FreeMouse(SDL_Mouse * mouse);
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static int id_mask;
static DFBEnumerationResult
EnumMice(DFBInputDeviceID device_id,
DFBInputDeviceDescription desc, void *callbackdata)
{
DFB_DeviceData *devdata = callbackdata;
if ((desc.type & DIDTF_MOUSE) && (device_id & id_mask)) {
SDL_Mouse mouse;
SDL_zero(mouse);
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mouse.id = device_id;
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mouse.CreateCursor = DirectFB_CreateCursor;
mouse.ShowCursor = DirectFB_ShowCursor;
mouse.MoveCursor = DirectFB_MoveCursor;
mouse.FreeCursor = DirectFB_FreeCursor;
mouse.WarpMouse = DirectFB_WarpMouse;
mouse.FreeMouse = DirectFB_FreeMouse;
mouse.cursor_shown = 1;
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SDL_AddMouse(&mouse, desc.name, 0, 0, 1);
devdata->mouse_id[devdata->num_mice++] = device_id;
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}
return DFENUM_OK;
}
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void
DirectFB_InitMouse(_THIS)
{
SDL_DFB_DEVICEDATA(_this);
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devdata->num_mice = 0;
if (LINUX_INPUT_SUPPORT) {
/* try non-core devices first */
id_mask = 0xF0;
devdata->dfb->EnumInputDevices(devdata->dfb, EnumMice, devdata);
if (devdata->num_mice == 0) {
/* try core devices */
id_mask = 0x0F;
devdata->dfb->EnumInputDevices(devdata->dfb, EnumMice, devdata);
}
}
if (devdata->num_mice == 0) {
SDL_Mouse mouse;
SDL_zero(mouse);
mouse.CreateCursor = DirectFB_CreateCursor;
mouse.ShowCursor = DirectFB_ShowCursor;
mouse.MoveCursor = DirectFB_MoveCursor;
mouse.FreeCursor = DirectFB_FreeCursor;
mouse.WarpMouse = DirectFB_WarpMouse;
mouse.FreeMouse = DirectFB_FreeMouse;
mouse.cursor_shown = 1;
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SDL_AddMouse(&mouse, "Mouse", 0, 0, 1);
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devdata->num_mice = 1;
}
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}
void
DirectFB_QuitMouse(_THIS)
{
SDL_DFB_DEVICEDATA(_this);
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if (LINUX_INPUT_SUPPORT) {
SDL_MouseQuit();
} else {
SDL_DelMouse(0);
}
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}
/* Create a cursor from a surface */
static SDL_Cursor *
DirectFB_CreateCursor(SDL_Surface * surface, int hot_x, int hot_y)
{
SDL_VideoDevice *dev = SDL_GetVideoDevice();
SDL_DFB_DEVICEDATA(dev);
DFB_CursorData *curdata;
DFBResult ret;
DFBSurfaceDescription dsc;
SDL_Cursor *cursor;
Uint32 *dest;
Uint32 *p;
int pitch, i;
SDL_DFB_CALLOC(cursor, 1, sizeof(*cursor));
SDL_DFB_CALLOC(curdata, 1, sizeof(*curdata));
dsc.flags =
DSDESC_WIDTH | DSDESC_HEIGHT | DSDESC_PIXELFORMAT | DSDESC_CAPS;
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dsc.caps = DSCAPS_VIDEOONLY;
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dsc.width = surface->w;
dsc.height = surface->h;
dsc.pixelformat = DSPF_ARGB;
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SDL_DFB_CHECKERR(devdata->dfb->
CreateSurface(devdata->dfb, &dsc, &curdata->surf));
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curdata->hotx = hot_x;
curdata->hoty = hot_y;
cursor->driverdata = curdata;
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SDL_DFB_CHECKERR(curdata->surf->
Lock(curdata->surf, DSLF_WRITE, (void *) &dest, &pitch));
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/* Relies on the fact that this is only called with ARGB surface. */
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p = surface->pixels;
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for (i = 0; i < surface->h; i++)
memcpy((char *) dest + i * pitch, (char *) p + i * surface->pitch,
4 * surface->w);
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curdata->surf->Unlock(curdata->surf);
return cursor;
error:
return NULL;
}
/* Show the specified cursor, or hide if cursor is NULL */
static int
DirectFB_ShowCursor(SDL_Cursor * cursor)
{
SDL_DFB_CURSORDATA(cursor);
DFBResult ret;
SDL_WindowID wid;
wid = SDL_GetFocusWindow();
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if (wid < 0)
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return -1;
else {
SDL_Window *window = SDL_GetWindowFromID(wid);
SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
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if (display) {
DFB_DisplayData *dispdata =
(DFB_DisplayData *) display->driverdata;
DFB_WindowData *windata = (DFB_WindowData *) window->driverdata;
if (cursor)
SDL_DFB_CHECKERR(windata->window->
SetCursorShape(windata->window,
curdata->surf, curdata->hotx,
curdata->hoty));
/* fprintf(stdout, "Cursor is %s\n", cursor ? "on" : "off"); */
SDL_DFB_CHECKERR(dispdata->layer->
SetCooperativeLevel(dispdata->layer,
DLSCL_ADMINISTRATIVE));
SDL_DFB_CHECKERR(dispdata->layer->
SetCursorOpacity(dispdata->layer,
cursor ? 0xC0 : 0x00));
SDL_DFB_CHECKERR(dispdata->layer->
SetCooperativeLevel(dispdata->layer,
DLSCL_SHARED));
}
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}
return 0;
error:
return -1;
}
/* This is called when a mouse motion event occurs */
static void
DirectFB_MoveCursor(SDL_Cursor * cursor)
{
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}
/* Free a window manager cursor */
static void
DirectFB_FreeCursor(SDL_Cursor * cursor)
{
SDL_DFB_CURSORDATA(cursor);
SDL_DFB_RELEASE(curdata->surf);
SDL_DFB_FREE(cursor->driverdata);
SDL_DFB_FREE(cursor);
}
/* Warp the mouse to (x,y) */
static void
DirectFB_WarpMouse(SDL_Mouse * mouse, SDL_WindowID windowID, int x, int y)
{
SDL_Window *window = SDL_GetWindowFromID(windowID);
SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
DFB_DisplayData *dispdata = (DFB_DisplayData *) display->driverdata;
DFB_WindowData *windata = (DFB_WindowData *) window->driverdata;
DFBResult ret;
int cx, cy;
SDL_DFB_CHECKERR(windata->window->GetPosition(windata->window, &cx, &cy));
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SDL_DFB_CHECKERR(dispdata->layer->
WarpCursor(dispdata->layer, cx + x, cy + y));
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error:
return;
}
/* Free the mouse when it's time */
static void
DirectFB_FreeMouse(SDL_Mouse * mouse)
{
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/* nothing yet */
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}
/* vi: set ts=4 sw=4 expandtab: */