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SDL_windowsmouse.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2011 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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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
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Lesser General Public License for more details.
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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
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Sam Lantinga
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slouken@libsdl.org
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#include "SDL_config.h"
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#include "SDL_windowsvideo.h"
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#include "../../events/SDL_mouse_c.h"
HCURSOR SDL_cursor = NULL;
static SDL_Cursor *
WIN_CreateDefaultCursor()
{
SDL_Cursor *cursor;
cursor = SDL_calloc(1, sizeof(*cursor));
if (cursor) {
cursor->driverdata = LoadCursor(NULL, IDC_ARROW);
} else {
SDL_OutOfMemory();
}
return cursor;
}
static SDL_Cursor *
WIN_CreateCursor(SDL_Surface * surface, int hot_x, int hot_y)
{
SDL_Cursor *cursor;
SDL_Surface *cvt;
HICON hicon;
HDC hdc;
BITMAPV4HEADER bmh;
LPVOID pixels;
ICONINFO ii;
SDL_zero(bmh);
bmh.bV4Size = sizeof(bmh);
bmh.bV4Width = surface->w;
bmh.bV4Height = -surface->h; /* Invert the image */
bmh.bV4Planes = 1;
bmh.bV4BitCount = 32;
bmh.bV4V4Compression = BI_BITFIELDS;
bmh.bV4AlphaMask = 0xFF000000;
bmh.bV4RedMask = 0x00FF0000;
bmh.bV4GreenMask = 0x0000FF00;
bmh.bV4BlueMask = 0x000000FF;
hdc = GetDC(NULL);
SDL_zero(ii);
ii.fIcon = FALSE;
ii.xHotspot = (DWORD)hot_x;
ii.yHotspot = (DWORD)hot_y;
ii.hbmColor = CreateDIBSection(hdc, (BITMAPINFO*)&bmh, DIB_RGB_COLORS, &pixels, NULL, 0);
ii.hbmMask = CreateBitmap(surface->w, surface->h, 1, 1, NULL);
ReleaseDC(NULL, hdc);
cvt = SDL_ConvertSurfaceFormat(surface, SDL_PIXELFORMAT_ARGB8888, 0);
if (!cvt) {
return NULL;
}
SDL_memcpy(pixels, cvt->pixels, cvt->h * cvt->pitch);
SDL_FreeSurface(cvt);
hicon = CreateIconIndirect(&ii);
DeleteObject(ii.hbmColor);
DeleteObject(ii.hbmMask);
if (!hicon) {
WIN_SetError("CreateIconIndirect()");
return NULL;
}
cursor = SDL_calloc(1, sizeof(*cursor));
if (cursor) {
cursor->driverdata = hicon;
} else {
DestroyIcon(hicon);
SDL_OutOfMemory();
}
return cursor;
}
static void
WIN_FreeCursor(SDL_Cursor * cursor)
{
HICON hicon = (HICON)cursor->driverdata;
DestroyIcon(hicon);
SDL_free(cursor);
}
static int
WIN_ShowCursor(SDL_Cursor * cursor)
{
if (cursor) {
SDL_cursor = (HCURSOR)cursor->driverdata;
} else {
SDL_cursor = NULL;
}
if (SDL_GetMouseFocus() != NULL) {
SetCursor(SDL_cursor);
}
return 0;
}
static void
WIN_WarpMouse(SDL_Window * window, int x, int y)
{
HWND hwnd = ((SDL_WindowData *) window->driverdata)->hwnd;
POINT pt;
pt.x = x;
pt.y = y;
ClientToScreen(hwnd, &pt);
SetCursorPos(pt.x, pt.y);
}
static int
WIN_SetRelativeMouseMode(SDL_bool enabled)
{
SDL_Unsupported();
return -1;
}
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void
WIN_InitMouse(_THIS)
{
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SDL_Mouse *mouse = SDL_GetMouse();
mouse->CreateCursor = WIN_CreateCursor;
mouse->ShowCursor = WIN_ShowCursor;
mouse->FreeCursor = WIN_FreeCursor;
mouse->WarpMouse = WIN_WarpMouse;
mouse->SetRelativeMouseMode = WIN_SetRelativeMouseMode;
SDL_SetDefaultCursor(WIN_CreateDefaultCursor());
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}
void
WIN_QuitMouse(_THIS)
{
}
/* vi: set ts=4 sw=4 expandtab: */