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qemu/sdl.c
aliguori 7b5d76dae3 DisplayAllocator interface (Stefano Stabellini) 
Hi all,
this patch adds a DisplayAllocator interface that allows display
frontends (sdl in particular) to provide a preallocated display buffer
for the graphical backend to use.

Whenever a graphical backend cannot use
qemu_create_displaysurface_from because its own internal pixel format
cannot be exported directly (text mode or graphical mode with color
depth 8 or 24), it creates another display buffer in memory using
qemu_create_displaysurface and does the conversion.
This new buffer needs to be blitted into the sdl surface buffer every time
we need to update portions of the screen.
We can avoid this using the DisplayAllocator interace: sdl provides its
own implementation of qemu_create_displaysurface, giving back the sdl
surface buffer directly (as we used to do before the DisplayState
changes).
Since the buffer returned by sdl could be in bgr format we need to put
back in the handlers of that case.

This approach is good if the two following conditions are true:

1) the sdl surface is a software surface that resides in main memory;

2) the host display color depth is either 16 or 32 bpp.

If first condition is false we can have bad performances using sdl
and vnc together.
If the second condition is false performances are certainly not going to
improve but they shouldn't get worse either.

The first condition is always true, at least on linux/X11 systems; but I
believe is true also on other platforms.
The second condition is true in the vast majority of the cases.

This patch should also have the good side effect of solving the sdl
2D slowness malc was reporting on MacOS, because SDL_BlitSurface is not
going to be called anymore when the guest is in text mode or 24bpp.
However the root problem is still present so I suspect we may
still see some slowness on MacOS when the guest is in 32 or 16 bpp.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6839 c046a42c-6fe2-441c-8c8c-71466251a162
2009-03-13 15:02:13 +00:00

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/*
* QEMU SDL display driver
*
* Copyright (c) 2003 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <SDL.h>
#include <SDL_syswm.h>
#ifndef _WIN32
#include <signal.h>
#endif
#include "qemu-common.h"
#include "console.h"
#include "sysemu.h"
#include "x_keymap.h"
static DisplayChangeListener *dcl;
static SDL_Surface *real_screen;
static SDL_Surface *guest_screen = NULL;
static int gui_grab; /* if true, all keyboard/mouse events are grabbed */
static int last_vm_running;
static int gui_saved_grab;
static int gui_fullscreen;
static int gui_noframe;
static int gui_key_modifier_pressed;
static int gui_keysym;
static int gui_fullscreen_initial_grab;
static int gui_grab_code = KMOD_LALT | KMOD_LCTRL;
static uint8_t modifiers_state[256];
static int width, height;
static SDL_Cursor *sdl_cursor_normal;
static SDL_Cursor *sdl_cursor_hidden;
static int absolute_enabled = 0;
static int guest_cursor = 0;
static int guest_x, guest_y;
static SDL_Cursor *guest_sprite = 0;
static uint8_t allocator;
static uint8_t hostbpp;
static void sdl_update(DisplayState *ds, int x, int y, int w, int h)
{
// printf("updating x=%d y=%d w=%d h=%d\n", x, y, w, h);
if (guest_screen) {
SDL_Rect rec;
rec.x = x;
rec.y = y;
rec.w = w;
rec.h = h;
SDL_BlitSurface(guest_screen, &rec, real_screen, &rec);
}
SDL_UpdateRect(real_screen, x, y, w, h);
}
static void sdl_setdata(DisplayState *ds)
{
SDL_Rect rec;
rec.x = 0;
rec.y = 0;
rec.w = real_screen->w;
rec.h = real_screen->h;
if (guest_screen != NULL) SDL_FreeSurface(guest_screen);
guest_screen = SDL_CreateRGBSurfaceFrom(ds_get_data(ds), ds_get_width(ds), ds_get_height(ds),
ds_get_bits_per_pixel(ds), ds_get_linesize(ds),
ds->surface->pf.rmask, ds->surface->pf.gmask,
ds->surface->pf.bmask, ds->surface->pf.amask);
}
static void do_sdl_resize(int width, int height, int bpp)
{
int flags;
// printf("resizing to %d %d\n", w, h);
flags = SDL_HWSURFACE|SDL_ASYNCBLIT|SDL_HWACCEL;
if (gui_fullscreen)
flags |= SDL_FULLSCREEN;
if (gui_noframe)
flags |= SDL_NOFRAME;
real_screen = SDL_SetVideoMode(width, height, bpp, flags);
if (!real_screen) {
fprintf(stderr, "Could not open SDL display\n");
exit(1);
}
}
static void sdl_resize(DisplayState *ds)
{
if (!allocator) {
do_sdl_resize(ds_get_width(ds), ds_get_height(ds), 0);
sdl_setdata(ds);
} else {
if (guest_screen != NULL) {
SDL_FreeSurface(guest_screen);
guest_screen = NULL;
}
}
}
static PixelFormat sdl_to_qemu_pixelformat(SDL_PixelFormat *sdl_pf)
{
PixelFormat qemu_pf;
memset(&qemu_pf, 0x00, sizeof(PixelFormat));
qemu_pf.bits_per_pixel = sdl_pf->BitsPerPixel;
qemu_pf.bytes_per_pixel = sdl_pf->BytesPerPixel;
qemu_pf.depth = (qemu_pf.bits_per_pixel) == 32 ? 24 : (qemu_pf.bits_per_pixel);
qemu_pf.rmask = sdl_pf->Rmask;
qemu_pf.gmask = sdl_pf->Gmask;
qemu_pf.bmask = sdl_pf->Bmask;
qemu_pf.amask = sdl_pf->Amask;
qemu_pf.rshift = sdl_pf->Rshift;
qemu_pf.gshift = sdl_pf->Gshift;
qemu_pf.bshift = sdl_pf->Bshift;
qemu_pf.ashift = sdl_pf->Ashift;
qemu_pf.rbits = 8 - sdl_pf->Rloss;
qemu_pf.gbits = 8 - sdl_pf->Gloss;
qemu_pf.bbits = 8 - sdl_pf->Bloss;
qemu_pf.abits = 8 - sdl_pf->Aloss;
qemu_pf.rmax = ((1 << qemu_pf.rbits) - 1);
qemu_pf.gmax = ((1 << qemu_pf.gbits) - 1);
qemu_pf.bmax = ((1 << qemu_pf.bbits) - 1);
qemu_pf.amax = ((1 << qemu_pf.abits) - 1);
return qemu_pf;
}
static DisplaySurface* sdl_create_displaysurface(int width, int height)
{
DisplaySurface *surface = (DisplaySurface*) qemu_mallocz(sizeof(DisplaySurface));
if (surface == NULL) {
fprintf(stderr, "sdl_create_displaysurface: malloc failed\n");
exit(1);
}
surface->width = width;
surface->height = height;
if (hostbpp == 16)
do_sdl_resize(width, height, 16);
else
do_sdl_resize(width, height, 32);
surface->pf = sdl_to_qemu_pixelformat(real_screen->format);
surface->linesize = real_screen->pitch;
surface->data = real_screen->pixels;
#ifdef WORDS_BIGENDIAN
surface->flags = QEMU_ALLOCATED_FLAG | QEMU_BIG_ENDIAN_FLAG;
#else
surface->flags = QEMU_ALLOCATED_FLAG;
#endif
allocator = 1;
return surface;
}
static void sdl_free_displaysurface(DisplaySurface *surface)
{
allocator = 0;
if (surface == NULL)
return;
qemu_free(surface);
}
static DisplaySurface* sdl_resize_displaysurface(DisplaySurface *surface, int width, int height)
{
sdl_free_displaysurface(surface);
return sdl_create_displaysurface(width, height);
}
/* generic keyboard conversion */
#include "sdl_keysym.h"
static kbd_layout_t *kbd_layout = NULL;
static uint8_t sdl_keyevent_to_keycode_generic(const SDL_KeyboardEvent *ev)
{
int keysym;
/* workaround for X11+SDL bug with AltGR */
keysym = ev->keysym.sym;
if (keysym == 0 && ev->keysym.scancode == 113)
keysym = SDLK_MODE;
/* For Japanese key '\' and '|' */
if (keysym == 92 && ev->keysym.scancode == 133) {
keysym = 0xa5;
}
return keysym2scancode(kbd_layout, keysym);
}
/* specific keyboard conversions from scan codes */
#if defined(_WIN32)
static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
{
return ev->keysym.scancode;
}
#else
#if defined(SDL_VIDEO_DRIVER_X11)
#include <X11/XKBlib.h>
static int check_for_evdev(void)
{
SDL_SysWMinfo info;
XkbDescPtr desc;
int has_evdev = 0;
const char *keycodes;
SDL_VERSION(&info.version);
if (!SDL_GetWMInfo(&info))
return 0;
desc = XkbGetKeyboard(info.info.x11.display,
XkbGBN_AllComponentsMask,
XkbUseCoreKbd);
if (desc == NULL || desc->names == NULL)
return 0;
keycodes = XGetAtomName(info.info.x11.display, desc->names->keycodes);
if (keycodes == NULL)
fprintf(stderr, "could not lookup keycode name\n");
else if (strstart(keycodes, "evdev_", NULL))
has_evdev = 1;
else if (!strstart(keycodes, "xfree86_", NULL))
fprintf(stderr,
"unknown keycodes `%s', please report to qemu-devel@nongnu.org\n",
keycodes);
XkbFreeClientMap(desc, XkbGBN_AllComponentsMask, True);
return has_evdev;
}
#else
static int check_for_evdev(void)
{
return 0;
}
#endif
static uint8_t sdl_keyevent_to_keycode(const SDL_KeyboardEvent *ev)
{
int keycode;
static int has_evdev = -1;
if (has_evdev == -1)
has_evdev = check_for_evdev();
keycode = ev->keysym.scancode;
if (keycode < 9) {
keycode = 0;
} else if (keycode < 97) {
keycode -= 8; /* just an offset */
} else if (keycode < 158) {
/* use conversion table */
if (has_evdev)
keycode = translate_evdev_keycode(keycode - 97);
else
keycode = translate_xfree86_keycode(keycode - 97);
} else if (keycode == 208) { /* Hiragana_Katakana */
keycode = 0x70;
} else if (keycode == 211) { /* backslash */
keycode = 0x73;
} else {
keycode = 0;
}
return keycode;
}
#endif
static void reset_keys(void)
{
int i;
for(i = 0; i < 256; i++) {
if (modifiers_state[i]) {
if (i & 0x80)
kbd_put_keycode(0xe0);
kbd_put_keycode(i | 0x80);
modifiers_state[i] = 0;
}
}
}
static void sdl_process_key(SDL_KeyboardEvent *ev)
{
int keycode, v;
if (ev->keysym.sym == SDLK_PAUSE) {
/* specific case */
v = 0;
if (ev->type == SDL_KEYUP)
v |= 0x80;
kbd_put_keycode(0xe1);
kbd_put_keycode(0x1d | v);
kbd_put_keycode(0x45 | v);
return;
}
if (kbd_layout) {
keycode = sdl_keyevent_to_keycode_generic(ev);
} else {
keycode = sdl_keyevent_to_keycode(ev);
}
switch(keycode) {
case 0x00:
/* sent when leaving window: reset the modifiers state */
reset_keys();
return;
case 0x2a: /* Left Shift */
case 0x36: /* Right Shift */
case 0x1d: /* Left CTRL */
case 0x9d: /* Right CTRL */
case 0x38: /* Left ALT */
case 0xb8: /* Right ALT */
if (ev->type == SDL_KEYUP)
modifiers_state[keycode] = 0;
else
modifiers_state[keycode] = 1;
break;
case 0x45: /* num lock */
case 0x3a: /* caps lock */
/* SDL does not send the key up event, so we generate it */
kbd_put_keycode(keycode);
kbd_put_keycode(keycode | 0x80);
return;
}
/* now send the key code */
if (keycode & 0x80)
kbd_put_keycode(0xe0);
if (ev->type == SDL_KEYUP)
kbd_put_keycode(keycode | 0x80);
else
kbd_put_keycode(keycode & 0x7f);
}
static void sdl_update_caption(void)
{
char buf[1024];
const char *status = "";
if (!vm_running)
status = " [Stopped]";
else if (gui_grab) {
if (!alt_grab)
status = " - Press Ctrl-Alt to exit grab";
else
status = " - Press Ctrl-Alt-Shift to exit grab";
}
if (qemu_name)
snprintf(buf, sizeof(buf), "QEMU (%s)%s", qemu_name, status);
else
snprintf(buf, sizeof(buf), "QEMU%s", status);
SDL_WM_SetCaption(buf, "QEMU");
}
static void sdl_hide_cursor(void)
{
if (!cursor_hide)
return;
if (kbd_mouse_is_absolute()) {
SDL_ShowCursor(1);
SDL_SetCursor(sdl_cursor_hidden);
} else {
SDL_ShowCursor(0);
}
}
static void sdl_show_cursor(void)
{
if (!cursor_hide)
return;
if (!kbd_mouse_is_absolute()) {
SDL_ShowCursor(1);
if (guest_cursor &&
(gui_grab || kbd_mouse_is_absolute() || absolute_enabled))
SDL_SetCursor(guest_sprite);
else
SDL_SetCursor(sdl_cursor_normal);
}
}
static void sdl_grab_start(void)
{
if (guest_cursor) {
SDL_SetCursor(guest_sprite);
if (!kbd_mouse_is_absolute() && !absolute_enabled)
SDL_WarpMouse(guest_x, guest_y);
} else
sdl_hide_cursor();
if (SDL_WM_GrabInput(SDL_GRAB_ON) == SDL_GRAB_ON) {
gui_grab = 1;
sdl_update_caption();
} else
sdl_show_cursor();
}
static void sdl_grab_end(void)
{
SDL_WM_GrabInput(SDL_GRAB_OFF);
gui_grab = 0;
sdl_show_cursor();
sdl_update_caption();
}
static void sdl_send_mouse_event(int dx, int dy, int dz, int x, int y, int state)
{
int buttons;
buttons = 0;
if (state & SDL_BUTTON(SDL_BUTTON_LEFT))
buttons |= MOUSE_EVENT_LBUTTON;
if (state & SDL_BUTTON(SDL_BUTTON_RIGHT))
buttons |= MOUSE_EVENT_RBUTTON;
if (state & SDL_BUTTON(SDL_BUTTON_MIDDLE))
buttons |= MOUSE_EVENT_MBUTTON;
if (kbd_mouse_is_absolute()) {
if (!absolute_enabled) {
sdl_hide_cursor();
if (gui_grab) {
sdl_grab_end();
}
absolute_enabled = 1;
}
dx = x * 0x7FFF / (width - 1);
dy = y * 0x7FFF / (height - 1);
} else if (absolute_enabled) {
sdl_show_cursor();
absolute_enabled = 0;
} else if (guest_cursor) {
x -= guest_x;
y -= guest_y;
guest_x += x;
guest_y += y;
dx = x;
dy = y;
}
kbd_mouse_event(dx, dy, dz, buttons);
}
static void toggle_full_screen(DisplayState *ds)
{
gui_fullscreen = !gui_fullscreen;
do_sdl_resize(real_screen->w, real_screen->h, real_screen->format->BitsPerPixel);
if (gui_fullscreen) {
gui_saved_grab = gui_grab;
sdl_grab_start();
} else {
if (!gui_saved_grab)
sdl_grab_end();
}
vga_hw_invalidate();
vga_hw_update();
}
static void sdl_refresh(DisplayState *ds)
{
SDL_Event ev1, *ev = &ev1;
int mod_state;
int buttonstate = SDL_GetMouseState(NULL, NULL);
if (last_vm_running != vm_running) {
last_vm_running = vm_running;
sdl_update_caption();
}
vga_hw_update();
SDL_EnableUNICODE(!is_graphic_console());
while (SDL_PollEvent(ev)) {
switch (ev->type) {
case SDL_VIDEOEXPOSE:
sdl_update(ds, 0, 0, real_screen->w, real_screen->h);
break;
case SDL_KEYDOWN:
case SDL_KEYUP:
if (ev->type == SDL_KEYDOWN) {
if (!alt_grab) {
mod_state = (SDL_GetModState() & gui_grab_code) ==
gui_grab_code;
} else {
mod_state = (SDL_GetModState() & (gui_grab_code | KMOD_LSHIFT)) ==
(gui_grab_code | KMOD_LSHIFT);
}
gui_key_modifier_pressed = mod_state;
if (gui_key_modifier_pressed) {
int keycode;
keycode = sdl_keyevent_to_keycode(&ev->key);
switch(keycode) {
case 0x21: /* 'f' key on US keyboard */
toggle_full_screen(ds);
gui_keysym = 1;
break;
case 0x02 ... 0x0a: /* '1' to '9' keys */
/* Reset the modifiers sent to the current console */
reset_keys();
console_select(keycode - 0x02);
if (!is_graphic_console()) {
/* display grab if going to a text console */
if (gui_grab)
sdl_grab_end();
}
gui_keysym = 1;
break;
default:
break;
}
} else if (!is_graphic_console()) {
int keysym;
keysym = 0;
if (ev->key.keysym.mod & (KMOD_LCTRL | KMOD_RCTRL)) {
switch(ev->key.keysym.sym) {
case SDLK_UP: keysym = QEMU_KEY_CTRL_UP; break;
case SDLK_DOWN: keysym = QEMU_KEY_CTRL_DOWN; break;
case SDLK_LEFT: keysym = QEMU_KEY_CTRL_LEFT; break;
case SDLK_RIGHT: keysym = QEMU_KEY_CTRL_RIGHT; break;
case SDLK_HOME: keysym = QEMU_KEY_CTRL_HOME; break;
case SDLK_END: keysym = QEMU_KEY_CTRL_END; break;
case SDLK_PAGEUP: keysym = QEMU_KEY_CTRL_PAGEUP; break;
case SDLK_PAGEDOWN: keysym = QEMU_KEY_CTRL_PAGEDOWN; break;
default: break;
}
} else {
switch(ev->key.keysym.sym) {
case SDLK_UP: keysym = QEMU_KEY_UP; break;
case SDLK_DOWN: keysym = QEMU_KEY_DOWN; break;
case SDLK_LEFT: keysym = QEMU_KEY_LEFT; break;
case SDLK_RIGHT: keysym = QEMU_KEY_RIGHT; break;
case SDLK_HOME: keysym = QEMU_KEY_HOME; break;
case SDLK_END: keysym = QEMU_KEY_END; break;
case SDLK_PAGEUP: keysym = QEMU_KEY_PAGEUP; break;
case SDLK_PAGEDOWN: keysym = QEMU_KEY_PAGEDOWN; break;
case SDLK_BACKSPACE: keysym = QEMU_KEY_BACKSPACE; break;
case SDLK_DELETE: keysym = QEMU_KEY_DELETE; break;
default: break;
}
}
if (keysym) {
kbd_put_keysym(keysym);
} else if (ev->key.keysym.unicode != 0) {
kbd_put_keysym(ev->key.keysym.unicode);
}
}
} else if (ev->type == SDL_KEYUP) {
if (!alt_grab) {
mod_state = (ev->key.keysym.mod & gui_grab_code);
} else {
mod_state = (ev->key.keysym.mod &
(gui_grab_code | KMOD_LSHIFT));
}
if (!mod_state) {
if (gui_key_modifier_pressed) {
gui_key_modifier_pressed = 0;
if (gui_keysym == 0) {
/* exit/enter grab if pressing Ctrl-Alt */
if (!gui_grab) {
/* if the application is not active,
do not try to enter grab state. It
prevents
'SDL_WM_GrabInput(SDL_GRAB_ON)'
from blocking all the application
(SDL bug). */
if (SDL_GetAppState() & SDL_APPACTIVE)
sdl_grab_start();
} else {
sdl_grab_end();
}
/* SDL does not send back all the
modifiers key, so we must correct it */
reset_keys();
break;
}
gui_keysym = 0;
}
}
}
if (is_graphic_console() && !gui_keysym)
sdl_process_key(&ev->key);
break;
case SDL_QUIT:
if (!no_quit)
qemu_system_shutdown_request();
break;
case SDL_MOUSEMOTION:
if (gui_grab || kbd_mouse_is_absolute() ||
absolute_enabled) {
sdl_send_mouse_event(ev->motion.xrel, ev->motion.yrel, 0,
ev->motion.x, ev->motion.y, ev->motion.state);
}
break;
case SDL_MOUSEBUTTONDOWN:
case SDL_MOUSEBUTTONUP:
{
SDL_MouseButtonEvent *bev = &ev->button;
if (!gui_grab && !kbd_mouse_is_absolute()) {
if (ev->type == SDL_MOUSEBUTTONDOWN &&
(bev->button == SDL_BUTTON_LEFT)) {
/* start grabbing all events */
sdl_grab_start();
}
} else {
int dz;
dz = 0;
if (ev->type == SDL_MOUSEBUTTONDOWN) {
buttonstate |= SDL_BUTTON(bev->button);
} else {
buttonstate &= ~SDL_BUTTON(bev->button);
}
#ifdef SDL_BUTTON_WHEELUP
if (bev->button == SDL_BUTTON_WHEELUP && ev->type == SDL_MOUSEBUTTONDOWN) {
dz = -1;
} else if (bev->button == SDL_BUTTON_WHEELDOWN && ev->type == SDL_MOUSEBUTTONDOWN) {
dz = 1;
}
#endif
sdl_send_mouse_event(0, 0, dz, bev->x, bev->y, buttonstate);
}
}
break;
case SDL_ACTIVEEVENT:
if (gui_grab && ev->active.state == SDL_APPINPUTFOCUS &&
!ev->active.gain && !gui_fullscreen_initial_grab) {
sdl_grab_end();
}
if (ev->active.state & SDL_APPACTIVE) {
if (ev->active.gain) {
/* Back to default interval */
dcl->gui_timer_interval = 0;
dcl->idle = 0;
} else {
/* Sleeping interval */
dcl->gui_timer_interval = 500;
dcl->idle = 1;
}
}
break;
default:
break;
}
}
}
static void sdl_fill(DisplayState *ds, int x, int y, int w, int h, uint32_t c)
{
SDL_Rect dst = { x, y, w, h };
SDL_FillRect(real_screen, &dst, c);
}
static void sdl_mouse_warp(int x, int y, int on)
{
if (on) {
if (!guest_cursor)
sdl_show_cursor();
if (gui_grab || kbd_mouse_is_absolute() || absolute_enabled) {
SDL_SetCursor(guest_sprite);
if (!kbd_mouse_is_absolute() && !absolute_enabled)
SDL_WarpMouse(x, y);
}
} else if (gui_grab)
sdl_hide_cursor();
guest_cursor = on;
guest_x = x, guest_y = y;
}
static void sdl_mouse_define(int width, int height, int bpp,
int hot_x, int hot_y,
uint8_t *image, uint8_t *mask)
{
uint8_t sprite[256], *line;
int x, y, dst, bypl, src = 0;
if (guest_sprite)
SDL_FreeCursor(guest_sprite);
memset(sprite, 0, 256);
bypl = ((width * bpp + 31) >> 5) << 2;
for (y = 0, dst = 0; y < height; y ++, image += bypl) {
line = image;
for (x = 0; x < width; x ++, dst ++) {
switch (bpp) {
case 24:
src = *(line ++); src |= *(line ++); src |= *(line ++);
break;
case 16:
case 15:
src = *(line ++); src |= *(line ++);
break;
case 8:
src = *(line ++);
break;
case 4:
src = 0xf & (line[x >> 1] >> ((x & 1)) << 2);
break;
case 2:
src = 3 & (line[x >> 2] >> ((x & 3)) << 1);
break;
case 1:
src = 1 & (line[x >> 3] >> (x & 7));
break;
}
if (!src)
sprite[dst >> 3] |= (1 << (~dst & 7)) & mask[dst >> 3];
}
}
guest_sprite = SDL_CreateCursor(sprite, mask, width, height, hot_x, hot_y);
if (guest_cursor &&
(gui_grab || kbd_mouse_is_absolute() || absolute_enabled))
SDL_SetCursor(guest_sprite);
}
static void sdl_cleanup(void)
{
if (guest_sprite)
SDL_FreeCursor(guest_sprite);
SDL_Quit();
}
void sdl_display_init(DisplayState *ds, int full_screen, int no_frame)
{
int flags;
uint8_t data = 0;
DisplayAllocator *da;
const SDL_VideoInfo *vi;
#if defined(__APPLE__)
/* always use generic keymaps */
if (!keyboard_layout)
keyboard_layout = "en-us";
#endif
if(keyboard_layout) {
kbd_layout = init_keyboard_layout(name2keysym, keyboard_layout);
if (!kbd_layout)
exit(1);
}
if (no_frame)
gui_noframe = 1;
flags = SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE;
if (SDL_Init (flags)) {
fprintf(stderr, "Could not initialize SDL - exiting\n");
exit(1);
}
vi = SDL_GetVideoInfo();
hostbpp = vi->vfmt->BitsPerPixel;
dcl = qemu_mallocz(sizeof(DisplayChangeListener));
dcl->dpy_update = sdl_update;
dcl->dpy_resize = sdl_resize;
dcl->dpy_refresh = sdl_refresh;
dcl->dpy_setdata = sdl_setdata;
dcl->dpy_fill = sdl_fill;
ds->mouse_set = sdl_mouse_warp;
ds->cursor_define = sdl_mouse_define;
register_displaychangelistener(ds, dcl);
da = qemu_mallocz(sizeof(DisplayAllocator));
da->create_displaysurface = sdl_create_displaysurface;
da->resize_displaysurface = sdl_resize_displaysurface;
da->free_displaysurface = sdl_free_displaysurface;
if (register_displayallocator(ds, da) == da) {
DisplaySurface *surf;
surf = sdl_create_displaysurface(ds_get_width(ds), ds_get_height(ds));
defaultallocator_free_displaysurface(ds->surface);
ds->surface = surf;
dpy_resize(ds);
}
sdl_update_caption();
SDL_EnableKeyRepeat(250, 50);
gui_grab = 0;
sdl_cursor_hidden = SDL_CreateCursor(&data, &data, 8, 1, 0, 0);
sdl_cursor_normal = SDL_GetCursor();
atexit(sdl_cleanup);
if (full_screen) {
gui_fullscreen = 1;
gui_fullscreen_initial_grab = 1;
sdl_grab_start();
}
}
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