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SDL_sysmouse.cc
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SDL_sysmouse.cc
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2011 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "SDL_config.h"
#include <AppKit.h>
#include <GameKit.h>
#include "SDL_BWin.h"
extern "C"
{
#include "SDL_sysmouse_c.h"
/* Convert bits to padded bytes */
#define PADDED_BITS(bits) ((bits+7)/8)
/* The implementation dependent data for the window manager cursor */
struct WMcursor
{
char *bits;
};
/* Can this be done in the BeOS? */
WMcursor *BE_CreateWMCursor(_THIS,
Uint8 * data, Uint8 * mask, int w, int h,
int hot_x, int hot_y)
{
WMcursor *cursor;
int allowed_x;
int allowed_y;
int run, pad, i;
char *cptr;
allowed_x = 16; /* BeOS limitation */
allowed_y = 16; /* BeOS limitation */
if ((w > allowed_x) || (h > allowed_y))
{
SDL_SetError("Only cursors of dimension (%dx%d) are allowed",
allowed_x, allowed_y);
return (NULL);
}
/* Allocate the cursor */
cursor = (WMcursor *) SDL_malloc(sizeof(WMcursor));
if (cursor == NULL) {
SDL_OutOfMemory();
return (NULL);
}
cursor->bits =
(char *) SDL_malloc(4 + 2 * ((allowed_x / 8) * allowed_y));
if (cursor->bits == NULL) {
SDL_free(cursor);
SDL_OutOfMemory();
return (NULL);
}
cursor->bits[0] = allowed_y; /* Size of the cursor */
cursor->bits[1] = 1; /* Bit depth of cursor */
cursor->bits[2] = hot_y;
cursor->bits[3] = hot_x;
cptr = &cursor->bits[4];
/* Pad out to the normal cursor size */
run = PADDED_BITS(w);
pad = PADDED_BITS(allowed_x) - run;
for (i = 0; i < h; ++i) {
SDL_memcpy(cptr, data, run);
SDL_memset(cptr + run, 0, pad);
data += run;
cptr += (run + pad);
}
for (; i < allowed_y; ++i) {
SDL_memset(cptr, 0, run + pad);
cptr += (run + pad);
}
for (i = 0; i < h; ++i) {
/* FIXME: The mask should be OR'd with the data to turn
inverted color pixels black, since inverted color pixels
aren't supported under BeOS.
*/
SDL_memcpy(cptr, mask, run);
SDL_memset(cptr + run, 0, pad);
mask += run;
cptr += (run + pad);
}
for (; i < allowed_y; ++i) {
SDL_memset(cptr, 0, run + pad);
cptr += (run + pad);
}
return (cursor);
}
int BE_ShowWMCursor(_THIS, WMcursor * cursor)
{
if (be_app->Lock()) {
if (cursor == NULL) {
if (SDL_BlankCursor != NULL) {
be_app->SetCursor(SDL_BlankCursor->bits);
}
} else {
be_app->SetCursor(cursor->bits);
}
be_app->Unlock();
}
return (1);
}
void BE_FreeWMCursor(_THIS, WMcursor * cursor)
{
SDL_free(cursor->bits);
SDL_free(cursor);
}
/* Implementation by Christian Bauer <cbauer@student.physik.uni-mainz.de> */
void BE_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
{
BPoint pt(x, y);
SDL_Win->Lock();
SDL_Win->ConvertToScreen(&pt);
SDL_Win->Unlock();
set_mouse_position((int32) pt.x, (int32) pt.y);
}
}; /* Extern C */
/* vi: set ts=4 sw=4 expandtab: */