lwjgl/src/native/macosx/org_lwjgl_opengl_Display.m

/* 
 * Copyright (c) 2002-2004 LWJGL Project
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 * 
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 * modification, are permitted provided that the following conditions are 
 * met:
 * 
 * * Redistributions of source code must retain the above copyright 
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
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 * * Neither the name of 'LWJGL' nor the names of 
 *   its contributors may be used to endorse or promote products derived 
 *   from this software without specific prior written permission.
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/**
 * $Id$
 *
 * Mac OS Xspecific display functions.
 *
 * @author elias_naur <elias_naur@users.sourceforge.net>
 * @version $Revision$
 */

#import <Cocoa/Cocoa.h>
#import <Carbon/Carbon.h>
#import <jawt_md.h>
#import <jni.h>
#import <unistd.h>
#import "display.h"
#import "common_tools.h"

#define WAIT_DELAY 100

static NSOpenGLContext *gl_context;

NSOpenGLContext *createContext(JNIEnv *env, jobject pixel_format, bool double_buffered, bool use_display_bpp, long drawable_type, NSOpenGLContext *share_context) {
	int bpp;
	jclass cls_pixel_format = (*env)->GetObjectClass(env, pixel_format);
	if (use_display_bpp)
		bpp = CGDisplayBitsPerPixel(kCGDirectMainDisplay);
	else
		bpp = (int)(*env)->GetIntField(env, pixel_format, (*env)->GetFieldID(env, cls_pixel_format, "bpp", "I"));
	
	int alpha = (int)(*env)->GetIntField(env, pixel_format, (*env)->GetFieldID(env, cls_pixel_format, "alpha", "I"));
	int depth = (int)(*env)->GetIntField(env, pixel_format, (*env)->GetFieldID(env, cls_pixel_format, "depth", "I"));
	int stencil = (int)(*env)->GetIntField(env, pixel_format, (*env)->GetFieldID(env, cls_pixel_format, "stencil", "I"));
	int samples = (int)(*env)->GetIntField(env, pixel_format, (*env)->GetFieldID(env, cls_pixel_format, "samples", "I"));
	int num_aux_buffers = (int)(*env)->GetIntField(env, pixel_format, (*env)->GetFieldID(env, cls_pixel_format, "num_aux_buffers", "I"));
	int accum_bpp = (int)(*env)->GetIntField(env, pixel_format, (*env)->GetFieldID(env, cls_pixel_format, "accum_bpp", "I"));
	int accum_alpha = (int)(*env)->GetIntField(env, pixel_format, (*env)->GetFieldID(env, cls_pixel_format, "accum_alpha", "I"));
	bool stereo = (bool)(*env)->GetBooleanField(env, pixel_format, (*env)->GetFieldID(env, cls_pixel_format, "stereo", "Z"));

	attrib_list_t attribs;
	jboolean allow_software_acceleration = getBooleanProperty(env, "org.lwjgl.opengl.Display.allowSoftwareOpenGL");
	initAttribList(&attribs);
	if (!allow_software_acceleration)
		putAttrib(&attribs, NSOpenGLPFAAccelerated);
	if (double_buffered)
		putAttrib(&attribs, NSOpenGLPFADoubleBuffer);
	putAttrib(&attribs, NSOpenGLPFAColorSize); putAttrib(&attribs, bpp);
	putAttrib(&attribs, NSOpenGLPFAAlphaSize); putAttrib(&attribs, alpha);
	putAttrib(&attribs, NSOpenGLPFADepthSize); putAttrib(&attribs, depth);
	putAttrib(&attribs, NSOpenGLPFAStencilSize); putAttrib(&attribs, stencil);
	putAttrib(&attribs, NSOpenGLPFAAccumSize); putAttrib(&attribs, accum_bpp + accum_alpha);
	putAttrib(&attribs, NSOpenGLPFASampleBuffers); putAttrib(&attribs, samples > 0 ? 1 : 0);
	putAttrib(&attribs, NSOpenGLPFASamples); putAttrib(&attribs, samples);
	putAttrib(&attribs, NSOpenGLPFAAuxBuffers); putAttrib(&attribs, num_aux_buffers);
	putAttrib(&attribs, drawable_type);
	if (stereo)
		putAttrib(&attribs, NSOpenGLPFAStereo);
	putAttrib(&attribs, 0);
	NSOpenGLPixelFormat* fmt = [[NSOpenGLPixelFormat alloc] initWithAttributes:(NSOpenGLPixelFormatAttribute *)attribs.attribs];

	if (fmt == nil) {
		throwException(env, "Could not create pixel format");
		return NULL;
	}

	NSOpenGLContext *context = [[NSOpenGLContext alloc] initWithFormat:fmt shareContext:share_context];

	[fmt release];
	if (context == nil)
		throwException(env, "Could not create context");
	return context;
}

NSOpenGLContext *getDisplayContext() {
	return gl_context;
}

JNIEXPORT void JNICALL Java_org_lwjgl_opengl_MacOSXDisplay_createContext(JNIEnv *env, jobject this, jobject pixel_format) {
	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
	gl_context = createContext(env, pixel_format, true, true, NSOpenGLPFAWindow, nil);
	[pool release];
}

JNIEXPORT void JNICALL Java_org_lwjgl_opengl_MacOSXDisplay_updateContext(JNIEnv *env, jobject this) {
	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
	[gl_context update];
	[pool release];
}

static void setView(JNIEnv *env, jobject canvas) {
	JAWT awt;
	JAWT_DrawingSurface* ds;
	JAWT_DrawingSurfaceInfo* dsi;
	JAWT_MacOSXDrawingSurfaceInfo* dsi_mac;
	jboolean result = JNI_FALSE;
	jint lock = 0;

	// get the AWT
	awt.version = JAWT_VERSION_1_4;
	NSView *view;
	while (true) {
		result = JAWT_GetAWT(env, &awt);
		if (result == JNI_FALSE) {
			throwException(env, "Could not get the JAWT interface");
			return;
		}

		ds = awt.GetDrawingSurface(env, canvas);
		if (ds == NULL) {
			throwException(env, "Could not get the drawing surface");
			return;
		}

		lock = ds->Lock(ds);
		if((lock & JAWT_LOCK_ERROR) != 0) {
			awt.FreeDrawingSurface(ds);
			throwException(env, "Could not lock the drawing surface");
			return;
		}

		dsi = ds->GetDrawingSurfaceInfo(ds);
		if (dsi != NULL) {
			dsi_mac = (JAWT_MacOSXDrawingSurfaceInfo*)dsi->platformInfo;
			view = dsi_mac->cocoaViewRef;
			if ([view lockFocusIfCanDraw] == YES)
				break;
			view = NULL;
			ds->FreeDrawingSurfaceInfo(dsi);
		}

		printfDebug("Could not get drawing surface info, retrying... \n");
		ds->Unlock(ds);
		awt.FreeDrawingSurface(ds);
		usleep(WAIT_DELAY);
	}

	[gl_context setView:view];

	[view unlockFocus];

	ds->FreeDrawingSurfaceInfo(dsi);
	ds->Unlock(ds);
	awt.FreeDrawingSurface(ds);
}

JNIEXPORT void JNICALL Java_org_lwjgl_opengl_MacOSXDisplay_restoreGamma(JNIEnv *env, jobject this) {
	CGDisplayRestoreColorSyncSettings();
}

JNIEXPORT void JNICALL Java_org_lwjgl_opengl_MacOSXDisplay_setGammaRamp(JNIEnv *env, jobject this, jobject gamma_buffer) {
	const CGGammaValue *values = (*env)->GetDirectBufferAddress(env, gamma_buffer);
	CGTableCount table_size = (*env)->GetDirectBufferCapacity(env, gamma_buffer);
	CGDisplayErr err = CGSetDisplayTransferByTable(kCGDirectMainDisplay, table_size, values, values, values);
	if (err != CGDisplayNoErr) {
		throwException(env, "Could not set display gamma");
	}
}

JNIEXPORT void JNICALL Java_org_lwjgl_opengl_MacOSXDisplay_hideUI(JNIEnv *env, jobject this, jboolean hide) {
	if (hide == JNI_TRUE) {
		SetSystemUIMode(kUIModeContentSuppressed, 0);
	} else {
		SetSystemUIMode(kUIModeNormal, 0);
	}
}

JNIEXPORT void JNICALL Java_org_lwjgl_opengl_MacOSXDisplay_setVSyncEnabled(JNIEnv *env, jobject this, jboolean vsync) {
	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
	long vsync_value = vsync  == JNI_TRUE ? 1 : 0;
	[gl_context setValues:&vsync_value forParameter:NSOpenGLCPSwapInterval];
	[pool release];
}

JNIEXPORT void JNICALL Java_org_lwjgl_opengl_MacOSXDisplay_swapBuffers(JNIEnv *env, jobject this) {
	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
	[gl_context flushBuffer];
	[pool release];
}
  
JNIEXPORT void JNICALL Java_org_lwjgl_opengl_MacOSXDisplay_setView(JNIEnv *env, jobject this, jobject canvas) {
	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
	if (canvas != NULL) {
		setView(env, canvas);
	} else {
		[gl_context clearDrawable];
	}
	[pool release];
}

JNIEXPORT void JNICALL Java_org_lwjgl_opengl_MacOSXDisplay_makeCurrent(JNIEnv *env, jobject this) {
	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
	[gl_context makeCurrentContext];
	[pool release];
}

JNIEXPORT void JNICALL Java_org_lwjgl_opengl_MacOSXDisplay_destroyContext(JNIEnv *env, jobject this) {
	NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
	if (gl_context != nil) {
		[gl_context clearDrawable];
		[gl_context release];
		gl_context = nil;
	}
	[pool release];
}