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openttd/src/video/cocoa/fullscreen.mm

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/* $Id$ */
/******************************************************************************
* Cocoa video driver *
* Known things left to do: *
* Scale&copy the old pixel buffer to the new one when switching resolution. *
******************************************************************************/
#ifdef WITH_COCOA
#define MAC_OS_X_VERSION_MIN_REQUIRED MAC_OS_X_VERSION_10_3
#include <AvailabilityMacros.h>
#import <Cocoa/Cocoa.h>
#import <sys/time.h> /* gettimeofday */
#import <sys/param.h> /* for MAXPATHLEN */
#import <unistd.h>
/**
* Important notice regarding all modifications!!!!!!!
* There are certain limitations because the file is objective C++.
* gdb has limitations.
* C++ and objective C code can't be joined in all cases (classes stuff).
* Read http://developer.apple.com/releasenotes/Cocoa/Objective-C++.html for more information.
*/
/* From Menus.h (according to Xcode Developer Documentation) */
extern "C" void ShowMenuBar();
extern "C" void HideMenuBar();
/* Defined in stdbool.h */
#ifndef __cplusplus
# ifndef __BEOS__
# undef bool
# undef false
# undef true
# endif
#endif
#include "../../stdafx.h"
#include "../../debug.h"
#include "../../core/geometry_type.hpp"
#include "cocoa_v.h"
#include "../../gfx_func.h"
#undef Rect
/* Structure for rez switch gamma fades
* We can hide the monitor flicker by setting the gamma tables to 0
*/
#define QZ_GAMMA_TABLE_SIZE 256
struct OTTD_QuartzGammaTable {
CGGammaValue red[QZ_GAMMA_TABLE_SIZE];
CGGammaValue green[QZ_GAMMA_TABLE_SIZE];
CGGammaValue blue[QZ_GAMMA_TABLE_SIZE];
};
/* 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;
{
/* The 64 bits libraries don't seem to know about _frame, so this hack won't work. */
#if !__LP64__
_frame = frame;
#endif
}
@end
uint QZ_ListModes(OTTD_Point *modes, uint max_modes, CGDirectDisplayID display_id, int display_depth)
{
CFArrayRef mode_list;
CFIndex num_modes;
CFIndex i;
uint count = 0;
mode_list = CGDisplayAvailableModes(display_id);
num_modes = CFArrayGetCount(mode_list);
/* Build list of modes with the requested bpp */
for (i = 0; i < num_modes && count < max_modes; i++) {
CFDictionaryRef onemode;
CFNumberRef number;
int bpp;
int intvalue;
bool hasMode;
uint16 width, height;
onemode = (const __CFDictionary*)CFArrayGetValueAtIndex(mode_list, i);
number = (const __CFNumber*)CFDictionaryGetValue(onemode, kCGDisplayBitsPerPixel);
CFNumberGetValue (number, kCFNumberSInt32Type, &bpp);
if (bpp != display_depth) continue;
number = (const __CFNumber*)CFDictionaryGetValue(onemode, kCGDisplayWidth);
CFNumberGetValue(number, kCFNumberSInt32Type, &intvalue);
width = (uint16)intvalue;
number = (const __CFNumber*)CFDictionaryGetValue(onemode, kCGDisplayHeight);
CFNumberGetValue(number, kCFNumberSInt32Type, &intvalue);
height = (uint16)intvalue;
/* Check if mode is already in the list */
{
uint i;
hasMode = false;
for (i = 0; i < count; i++) {
if (modes[i].x == width && modes[i].y == height) {
hasMode = true;
break;
}
}
}
if (hasMode) continue;
/* Add mode to the list */
modes[count].x = width;
modes[count].y = height;
count++;
}
/* Sort list smallest to largest */
{
uint i, j;
for (i = 0; i < count; i++) {
for (j = 0; j < count-1; j++) {
if (modes[j].x > modes[j + 1].x || (
modes[j].x == modes[j + 1].x &&
modes[j].y > modes[j + 1].y
)) {
uint tmpw = modes[j].x;
uint tmph = modes[j].y;
modes[j].x = modes[j + 1].x;
modes[j].y = modes[j + 1].y;
modes[j + 1].x = tmpw;
modes[j + 1].y = tmph;
}
}
}
}
return count;
}
/* Small function to test if the main display can display 8 bpp in fullscreen */
bool QZ_CanDisplay8bpp()
{
OTTD_Point p;
/* We want to know if 8 bpp is possible in fullscreen and not anything about resolutions.
* Because of this we want to fill a list of 1 resolution of 8 bpp on display 0 (main) and return if we found one. */
return QZ_ListModes(&p, 1, 0, 8);
}
class FullscreenSubdriver: public CocoaSubdriver {
int display_width;
int display_height;
int display_depth;
int screen_pitch;
void *screen_buffer;
void *pixel_buffer;
CGDirectDisplayID display_id; /* 0 == main display (only support single display) */
CFDictionaryRef cur_mode; /* current mode of the display */
CFDictionaryRef save_mode; /* original mode of the display */
CGDirectPaletteRef palette; /* palette of an 8-bit display */
#define MAX_DIRTY_RECTS 100
Rect dirty_rects[MAX_DIRTY_RECTS];
int num_dirty_rects;
/* Gamma functions to try to hide the flash from a rez switch
* Fade the display from normal to black
* Save gamma tables for fade back to normal
*/
uint32 FadeGammaOut(OTTD_QuartzGammaTable *table)
{
CGGammaValue redTable[QZ_GAMMA_TABLE_SIZE];
CGGammaValue greenTable[QZ_GAMMA_TABLE_SIZE];
CGGammaValue blueTable[QZ_GAMMA_TABLE_SIZE];
float percent;
int j;
unsigned int actual;
if (CGGetDisplayTransferByTable(
display_id, QZ_GAMMA_TABLE_SIZE,
table->red, table->green, table->blue, &actual
) != CGDisplayNoErr ||
actual != QZ_GAMMA_TABLE_SIZE) {
return 1;
}
memcpy(redTable, table->red, sizeof(redTable));
memcpy(greenTable, table->green, sizeof(greenTable));
memcpy(blueTable, table->blue, sizeof(greenTable));
for (percent = 1.0; percent >= 0.0; percent -= 0.01) {
for (j = 0; j < QZ_GAMMA_TABLE_SIZE; j++) {
redTable[j] = redTable[j] * percent;
greenTable[j] = greenTable[j] * percent;
blueTable[j] = blueTable[j] * percent;
}
if (CGSetDisplayTransferByTable(
display_id, QZ_GAMMA_TABLE_SIZE,
redTable, greenTable, blueTable
) != CGDisplayNoErr) {
CGDisplayRestoreColorSyncSettings();
return 1;
}
CSleep(10);
}
return 0;
}
/* Fade the display from black to normal
* Restore previously saved gamma values
*/
uint32 FadeGammaIn(const OTTD_QuartzGammaTable *table)
{
CGGammaValue redTable[QZ_GAMMA_TABLE_SIZE];
CGGammaValue greenTable[QZ_GAMMA_TABLE_SIZE];
CGGammaValue blueTable[QZ_GAMMA_TABLE_SIZE];
float percent;
int j;
memset(redTable, 0, sizeof(redTable));
memset(greenTable, 0, sizeof(greenTable));
memset(blueTable, 0, sizeof(greenTable));
for (percent = 0.0; percent <= 1.0; percent += 0.01) {
for (j = 0; j < QZ_GAMMA_TABLE_SIZE; j++) {
redTable[j] = table->red[j] * percent;
greenTable[j] = table->green[j] * percent;
blueTable[j] = table->blue[j] * percent;
}
if (CGSetDisplayTransferByTable(
display_id, QZ_GAMMA_TABLE_SIZE,
redTable, greenTable, blueTable
) != CGDisplayNoErr) {
CGDisplayRestoreColorSyncSettings();
return 1;
}
CSleep(10);
}
return 0;
}
/* Wait for the VBL to occur (estimated since we don't have a hardware interrupt) */
void WaitForVerticalBlank()
{
/* The VBL delay is based on Ian Ollmann's RezLib <iano@cco.caltech.edu> */
double refreshRate;
double linesPerSecond;
double target;
double position;
double adjustment;
CFNumberRef refreshRateCFNumber;
refreshRateCFNumber = (const __CFNumber*)CFDictionaryGetValue(cur_mode, kCGDisplayRefreshRate);
if (refreshRateCFNumber == NULL) return;
if (CFNumberGetValue(refreshRateCFNumber, kCFNumberDoubleType, &refreshRate) == 0)
return;
if (refreshRate == 0) return;
linesPerSecond = refreshRate * display_height;
target = display_height;
/* Figure out the first delay so we start off about right */
position = CGDisplayBeamPosition(display_id);
if (position > target) position = 0;
adjustment = (target - position) / linesPerSecond;
CSleep((uint32)(adjustment * 1000));
}
bool SetVideoMode(int w, int h)
{
boolean_t exact_match;
CFNumberRef number;
int bpp;
int gamma_error;
OTTD_QuartzGammaTable gamma_table;
NSRect screen_rect;
CGError error;
NSPoint pt;
/* Destroy any previous mode */
if (pixel_buffer != NULL) {
free(pixel_buffer);
pixel_buffer = NULL;
}
/* See if requested mode exists */
cur_mode = CGDisplayBestModeForParameters(display_id, display_depth, w, h, &exact_match);
/* If the mode wasn't an exact match, check if it has the right bpp, and update width and height */
if (!exact_match) {
number = (const __CFNumber*) CFDictionaryGetValue(cur_mode, kCGDisplayBitsPerPixel);
CFNumberGetValue(number, kCFNumberSInt32Type, &bpp);
if (bpp != display_depth) {
DEBUG(driver, 0, "Failed to find display resolution");
goto ERR_NO_MATCH;
}
number = (const __CFNumber*)CFDictionaryGetValue(cur_mode, kCGDisplayWidth);
CFNumberGetValue(number, kCFNumberSInt32Type, &w);
number = (const __CFNumber*)CFDictionaryGetValue(cur_mode, kCGDisplayHeight);
CFNumberGetValue(number, kCFNumberSInt32Type, &h);
}
/* Fade display to zero gamma */
gamma_error = FadeGammaOut(&gamma_table);
/* Put up the blanking window (a window above all other windows) */
error = CGDisplayCapture(display_id);
if (CGDisplayNoErr != error) {
DEBUG(driver, 0, "Failed capturing display");
goto ERR_NO_CAPTURE;
}
/* Do the physical switch */
if (CGDisplaySwitchToMode(display_id, cur_mode) != CGDisplayNoErr) {
DEBUG(driver, 0, "Failed switching display resolution");
goto ERR_NO_SWITCH;
}
screen_buffer = CGDisplayBaseAddress(display_id);
screen_pitch = CGDisplayBytesPerRow(display_id);
display_width = CGDisplayPixelsWide(display_id);
display_height = CGDisplayPixelsHigh(display_id);
/* Setup double-buffer emulation */
pixel_buffer = malloc(display_width * display_height * display_depth / 8);
if (pixel_buffer == NULL) {
DEBUG(driver, 0, "Failed to allocate memory for double buffering");
goto ERR_DOUBLEBUF;
}
if (display_depth == 8 && !CGDisplayCanSetPalette(display_id)) {
DEBUG(driver, 0, "Not an indexed display mode.");
goto ERR_NOT_INDEXED;
}
/* If we don't hide menu bar, it will get events and interrupt the program */
HideMenuBar();
/* Fade the display to original gamma */
if (!gamma_error) FadeGammaIn(&gamma_table);
/* 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.
*/
screen_rect = NSMakeRect(0, 0, display_width, display_height);
[ [ NSScreen mainScreen ] setFrame:screen_rect ];
pt = [ NSEvent mouseLocation ];
pt.y = display_height - pt.y;
if (MouseIsInsideView(&pt)) QZ_HideMouse();
UpdatePalette(0, 256);
return true;
/* Since the blanking window covers *all* windows (even force quit) correct recovery is crucial */
ERR_NOT_INDEXED:
free(pixel_buffer);
pixel_buffer = NULL;
ERR_DOUBLEBUF:
CGDisplaySwitchToMode(display_id, save_mode);
ERR_NO_SWITCH:
CGReleaseAllDisplays();
ERR_NO_CAPTURE:
if (!gamma_error) FadeGammaIn(&gamma_table);
ERR_NO_MATCH:
display_width = 0;
display_height = 0;
return false;
}
void RestoreVideoMode()
{
/* Release fullscreen resources */
OTTD_QuartzGammaTable gamma_table;
int gamma_error;
NSRect screen_rect;
gamma_error = FadeGammaOut(&gamma_table);
/* Restore original screen resolution/bpp */
CGDisplaySwitchToMode(display_id, save_mode);
CGReleaseAllDisplays();
ShowMenuBar();
/* Reset the main screen's rectangle
* See comment in SetVideoMode for why we do this
*/
screen_rect = NSMakeRect(0, 0, CGDisplayPixelsWide(display_id), CGDisplayPixelsHigh(display_id));
[ [ NSScreen mainScreen ] setFrame:screen_rect ];
QZ_ShowMouse();
/* Destroy the pixel buffer */
if (pixel_buffer != NULL) {
free(pixel_buffer);
pixel_buffer = NULL;
}
if (!gamma_error) FadeGammaIn(&gamma_table);
display_width = 0;
display_height = 0;
}
public:
FullscreenSubdriver(int bpp)
{
if (bpp != 8 && bpp != 32) {
error("Cocoa: This video driver only supports 8 and 32 bpp blitters.");
}
/* Initialize the video settings; this data persists between mode switches */
display_id = kCGDirectMainDisplay;
save_mode = CGDisplayCurrentMode(display_id);
if (bpp == 8) palette = CGPaletteCreateDefaultColorPalette();
display_width = 0;
display_height = 0;
display_depth = bpp;
pixel_buffer = NULL;
num_dirty_rects = MAX_DIRTY_RECTS;
}
virtual ~FullscreenSubdriver()
{
RestoreVideoMode();
}
virtual void Draw()
{
const uint8 *src = (uint8*) pixel_buffer;
uint8 *dst = (uint8*) screen_buffer;
uint pitch = screen_pitch;
uint width = display_width;
uint num_dirty = num_dirty_rects;
uint bytesperpixel = display_depth / 8;
uint i;
/* Check if we need to do anything */
if (num_dirty == 0) return;
if (num_dirty >= MAX_DIRTY_RECTS) {
num_dirty = 1;
dirty_rects[0].left = 0;
dirty_rects[0].top = 0;
dirty_rects[0].right = display_width;
dirty_rects[0].bottom = display_height;
}
WaitForVerticalBlank();
/* Build the region of dirty rectangles */
for (i = 0; i < num_dirty; i++) {
uint y = dirty_rects[i].top;
uint left = dirty_rects[i].left;
uint length = dirty_rects[i].right - left;
uint bottom = dirty_rects[i].bottom;
for (; y < bottom; y++) {
memcpy(dst + y * pitch + left * bytesperpixel, src + y * width * bytesperpixel + left * bytesperpixel, length * bytesperpixel);
}
}
num_dirty_rects = 0;
}
virtual void MakeDirty(int left, int top, int width, int height)
{
if (num_dirty_rects < MAX_DIRTY_RECTS) {
dirty_rects[num_dirty_rects].left = left;
dirty_rects[num_dirty_rects].top = top;
dirty_rects[num_dirty_rects].right = left + width;
dirty_rects[num_dirty_rects].bottom = top + height;
}
num_dirty_rects++;
}
virtual void UpdatePalette(uint first_color, uint num_colors)
{
CGTableCount index;
CGDeviceColor color;
if (display_depth != 8)
return;
for (index = first_color; index < first_color+num_colors; index++) {
/* Clamp colors between 0.0 and 1.0 */
color.red = _cur_palette[index].r / 255.0;
color.blue = _cur_palette[index].b / 255.0;
color.green = _cur_palette[index].g / 255.0;
CGPaletteSetColorAtIndex(palette, color, index);
}
CGDisplaySetPalette(display_id, palette);
}
virtual uint ListModes(OTTD_Point *modes, uint max_modes)
{
return QZ_ListModes(modes, max_modes, display_id, display_depth);
}
virtual bool ChangeResolution(int w, int h)
{
int old_width = display_width;
int old_height = display_height;
if (SetVideoMode(w, h))
return true;
if (old_width != 0 && old_height != 0)
SetVideoMode(old_width, old_height);
return false;
}
virtual bool IsFullscreen()
{
return true;
}
virtual int GetWidth()
{
return display_width;
}
virtual int GetHeight()
{
return display_height;
}
virtual void *GetPixelBuffer()
{
return pixel_buffer;
}
/*
* Convert local coordinate to window server (CoreGraphics) coordinate.
* In fullscreen mode this just means copying the coords.
*/
virtual CGPoint PrivateLocalToCG(NSPoint *p)
{
CGPoint cgp;
cgp.x = p->x;
cgp.y = p->y;
return cgp;
}
virtual NSPoint GetMouseLocation(NSEvent *event)
{
NSPoint pt;
pt = [ NSEvent mouseLocation ];
pt.y = display_height - pt.y;
return pt;
}
virtual bool MouseIsInsideView(NSPoint *pt)
{
return pt->x >= 0 && pt->y >= 0 && pt->x < display_width && pt->y < display_height;
}
virtual bool IsActive()
{
return true;
}
};
CocoaSubdriver *QZ_CreateFullscreenSubdriver(int width, int height, int bpp)
{
FullscreenSubdriver *ret;
ret = new FullscreenSubdriver(bpp);
if (!ret->ChangeResolution(width, height)) {
delete ret;
return NULL;
}
return ret;
}
#endif /* WITH_COCOA */
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