/*

SDL - Simple DirectMedia Layer

Copyright (C) 1997-2009 Sam Lantinga

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_cocoavideo.h"

/*

Add methods to get at private members of NSScreen.

Since there is a bug in Apple's screen switching code

that does not update this variable when switching

to fullscreen, we'll set it manually (but only for the

main screen).

*/

@interface NSScreen (NSScreenAccess)

- (void) setFrame:(NSRect)frame;

@end

@implementation NSScreen (NSScreenAccess)

- (void) setFrame:(NSRect)frame;

{

_frame = frame;

}

@end

static void

CG_SetError(const char *prefix, CGDisplayErr result)

{

const char *error;

switch (result) {

case kCGErrorFailure:

error = "kCGErrorFailure";

break;

case kCGErrorIllegalArgument:

error = "kCGErrorIllegalArgument";

break;

case kCGErrorInvalidConnection:

error = "kCGErrorInvalidConnection";

break;

case kCGErrorInvalidContext:

error = "kCGErrorInvalidContext";

break;

case kCGErrorCannotComplete:

error = "kCGErrorCannotComplete";

break;

case kCGErrorNameTooLong:

error = "kCGErrorNameTooLong";

break;

case kCGErrorNotImplemented:

error = "kCGErrorNotImplemented";

break;

case kCGErrorRangeCheck:

error = "kCGErrorRangeCheck";

break;

case kCGErrorTypeCheck:

error = "kCGErrorTypeCheck";

break;

case kCGErrorNoCurrentPoint:

error = "kCGErrorNoCurrentPoint";

break;

case kCGErrorInvalidOperation:

error = "kCGErrorInvalidOperation";

break;

case kCGErrorNoneAvailable:

error = "kCGErrorNoneAvailable";

break;

default:

error = "Unknown Error";

break;

}

SDL_SetError("%s: %s", prefix, error);

}

static SDL_bool

GetDisplayMode(CFDictionaryRef moderef, SDL_DisplayMode *mode)

{

SDL_DisplayModeData *data;

CFNumberRef number;

long width, height, bpp, refreshRate;

data = (SDL_DisplayModeData *) SDL_malloc(sizeof(*data));

if (!data) {

return SDL_FALSE;

}

data->moderef = moderef;

number = CFDictionaryGetValue(moderef, kCGDisplayWidth);

CFNumberGetValue(number, kCFNumberLongType, &width);

number = CFDictionaryGetValue(moderef, kCGDisplayHeight);

CFNumberGetValue(number, kCFNumberLongType, &height);

number = CFDictionaryGetValue(moderef, kCGDisplayBitsPerPixel);

CFNumberGetValue(number, kCFNumberLongType, &bpp);

number = CFDictionaryGetValue(moderef, kCGDisplayRefreshRate);

CFNumberGetValue(number, kCFNumberLongType, &refreshRate);

mode->format = SDL_PIXELFORMAT_UNKNOWN;

switch (bpp) {

case 8:

mode->format = SDL_PIXELFORMAT_INDEX8;

break;

case 16:

mode->format = SDL_PIXELFORMAT_ARGB1555;

break;

case 32:

mode->format = SDL_PIXELFORMAT_ARGB8888;

break;

}

mode->w = width;

mode->h = height;

mode->refresh_rate = refreshRate;

mode->driverdata = data;

return SDL_TRUE;

}

void

Cocoa_InitModes(_THIS)

{

CGDisplayErr result;

CGDirectDisplayID *displays;

CGDisplayCount numDisplays;

int i;

result = CGGetOnlineDisplayList(0, NULL, &numDisplays);

if (result != kCGErrorSuccess) {

CG_SetError("CGGetOnlineDisplayList()", result);

return;

}

displays = SDL_stack_alloc(CGDirectDisplayID, numDisplays);

result = CGGetOnlineDisplayList(numDisplays, displays, &numDisplays);

if (result != kCGErrorSuccess) {

CG_SetError("CGGetOnlineDisplayList()", result);

SDL_stack_free(displays);

return;

}

for (i = 0; i < numDisplays; ++i) {

SDL_VideoDisplay display;

SDL_DisplayData *displaydata;

SDL_DisplayMode mode;

CFDictionaryRef moderef;

if (CGDisplayIsInMirrorSet(displays[i])) {

continue;

}

moderef = CGDisplayCurrentMode(displays[i]);

if (!moderef) {

continue;

}

displaydata = (SDL_DisplayData *) SDL_malloc(sizeof(*displaydata));

if (!displaydata) {

continue;

}

displaydata->display = displays[i];

SDL_zero(display);

if (!GetDisplayMode (moderef, &mode)) {

SDL_free(displaydata);

continue;

}

display.desktop_mode = mode;

display.current_mode = mode;

display.driverdata = displaydata;

SDL_AddVideoDisplay(&display);

}

SDL_stack_free(displays);

}

static void

AddDisplayMode(const void *moderef, void *context)

{

SDL_VideoDevice *_this = (SDL_VideoDevice *) context;

SDL_DisplayMode mode;

if (GetDisplayMode(moderef, &mode)) {

SDL_AddDisplayMode(_this->current_display, &mode);

}

}

void

Cocoa_GetDisplayModes(_THIS)

{

SDL_DisplayData *data = (SDL_DisplayData *) SDL_CurrentDisplay.driverdata;

CFArrayRef modes;

CFRange range;

modes = CGDisplayAvailableModes(data->display);

if (!modes) {

return;

}

range.location = 0;

range.length = CFArrayGetCount(modes);

CFArrayApplyFunction(modes, range, AddDisplayMode, _this);

}

int

Cocoa_SetDisplayMode(_THIS, SDL_DisplayMode * mode)

{

SDL_DisplayData *displaydata = (SDL_DisplayData *) SDL_CurrentDisplay.driverdata;

SDL_DisplayModeData *data = (SDL_DisplayModeData *) mode->driverdata;

CGDisplayFadeReservationToken fade_token = kCGDisplayFadeReservationInvalidToken;

CGError result;

/* Fade to black to hide resolution-switching flicker */

if (CGAcquireDisplayFadeReservation(5, &fade_token) == kCGErrorSuccess) {

CGDisplayFade(fade_token, 0.3, kCGDisplayBlendNormal, kCGDisplayBlendSolidColor, 0.0, 0.0, 0.0, TRUE);

}

/* Put up the blanking window (a window above all other windows) */

result = CGDisplayCapture(displaydata->display);

if (result != kCGErrorSuccess) {

CG_SetError("CGDisplayCapture()", result);

goto ERR_NO_CAPTURE;

}

/* Do the physical switch */

result = CGDisplaySwitchToMode(displaydata->display, data->moderef);

if (result != kCGErrorSuccess) {

CG_SetError("CGDisplaySwitchToMode()", result);

goto ERR_NO_SWITCH;

}

/* Hide the menu bar so it doesn't intercept events */

HideMenuBar();

/* Fade in again (asynchronously) */

if (fade_token != kCGDisplayFadeReservationInvalidToken) {

CGDisplayFade(fade_token, 0.5, kCGDisplayBlendSolidColor, kCGDisplayBlendNormal, 0.0, 0.0, 0.0, FALSE);

CGReleaseDisplayFadeReservation(fade_token);

}

/*

There is a bug in Cocoa where NSScreen doesn't synchronize

with CGDirectDisplay, so the main screen's frame is wrong.

As a result, coordinate translation produces incorrect results.

We can hack around this bug by setting the screen rect

ourselves. This hack should be removed if/when the bug is fixed.

*/

[[NSScreen mainScreen] setFrame:NSMakeRect(0,0,mode->w,mode->h)];

return 0;

/* Since the blanking window covers *all* windows (even force quit) correct recovery is crucial */

ERR_NO_SWITCH:

CGDisplayRelease(displaydata->display);

ERR_NO_CAPTURE:

if (fade_token != kCGDisplayFadeReservationInvalidToken) {

CGDisplayFade (fade_token, 0.5, kCGDisplayBlendSolidColor, kCGDisplayBlendNormal, 0.0, 0.0, 0.0, FALSE);

CGReleaseDisplayFadeReservation(fade_token);

}

return -1;

}

void

Cocoa_QuitModes(_THIS)

{

int i, saved_display;

saved_display = _this->current_display;

for (i = 0; i < _this->num_displays; ++i) {

SDL_VideoDisplay *display = &_this->displays[i];

if (display->current_mode.driverdata != display->desktop_mode.driverdata) {

_this->current_display = i;

Cocoa_SetDisplayMode(_this, &display->desktop_mode);

}

}

CGReleaseAllDisplays();

ShowMenuBar();

_this->current_display = saved_display;

}

/* vi: set ts=4 sw=4 expandtab: */