/libs/cocos2d/CCLayer.m

  1/*
  2 * cocos2d for iPhone: http://www.cocos2d-iphone.org
  3 *
  4 * Copyright (c) 2008-2010 Ricardo Quesada
  5 * 
  6 * Permission is hereby granted, free of charge, to any person obtaining a copy
  7 * of this software and associated documentation files (the "Software"), to deal
  8 * in the Software without restriction, including without limitation the rights
  9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 10 * copies of the Software, and to permit persons to whom the Software is
 11 * furnished to do so, subject to the following conditions:
 12 * 
 13 * The above copyright notice and this permission notice shall be included in
 14 * all copies or substantial portions of the Software.
 15 * 
 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 22 * THE SOFTWARE.
 23 *
 24 */
 25
 26
 27
 28#import <OpenGLES/ES1/gl.h>
 29#import <stdarg.h>
 30
 31#import "CCLayer.h"
 32#import "CCDirector.h"
 33#import "CCTouchDispatcher.h"
 34#import "ccMacros.h"
 35#import "Support/CGPointExtension.h"
 36
 37#pragma mark -
 38#pragma mark Layer
 39
 40@implementation CCLayer
 41
 42#pragma mark Layer - Init
 43-(id) init
 44{
 45	if( (self=[super init]) ) {
 46	
 47		CGSize s = [[CCDirector sharedDirector] winSize];
 48		anchorPoint_ = ccp(0.5f, 0.5f);
 49		[self setContentSize:s];
 50		self.isRelativeAnchorPoint = NO;
 51
 52		isTouchEnabled = NO;
 53		isAccelerometerEnabled = NO;
 54	}
 55	
 56	return self;
 57}
 58
 59#pragma mark Layer - Touch and Accelerometer related
 60
 61-(void) registerWithTouchDispatcher
 62{
 63	[[CCTouchDispatcher sharedDispatcher] addStandardDelegate:self priority:0];
 64}
 65
 66-(BOOL) isAccelerometerEnabled
 67{
 68	return isAccelerometerEnabled;
 69}
 70
 71-(void) setIsAccelerometerEnabled:(BOOL)enabled
 72{
 73	if( enabled != isAccelerometerEnabled ) {
 74		isAccelerometerEnabled = enabled;
 75		if( isRunning_ ) {
 76			if( enabled )
 77				[[UIAccelerometer sharedAccelerometer] setDelegate:self];
 78			else
 79				[[UIAccelerometer sharedAccelerometer] setDelegate:nil];
 80		}
 81	}
 82}
 83
 84-(BOOL) isTouchEnabled
 85{
 86	return isTouchEnabled;
 87}
 88
 89-(void) setIsTouchEnabled:(BOOL)enabled
 90{
 91	if( isTouchEnabled != enabled ) {
 92		isTouchEnabled = enabled;
 93		if( isRunning_ ) {
 94			if( enabled )
 95				[self registerWithTouchDispatcher];
 96			else
 97				[[CCTouchDispatcher sharedDispatcher] removeDelegate:self];
 98		}
 99	}
100}
101
102#pragma mark Layer - Callbacks
103-(void) onEnter
104{
105	// register 'parent' nodes first
106	// since events are propagated in reverse order
107	if (isTouchEnabled)
108		[self registerWithTouchDispatcher];
109	
110	// then iterate over all the children
111	[super onEnter];
112
113	if( isAccelerometerEnabled )
114		[[UIAccelerometer sharedAccelerometer] setDelegate:self];
115}
116
117-(void) onExit
118{
119	if( isTouchEnabled )
120		[[CCTouchDispatcher sharedDispatcher] removeDelegate:self];
121	
122	if( isAccelerometerEnabled )
123		[[UIAccelerometer sharedAccelerometer] setDelegate:nil];
124	
125	[super onExit];
126}
127-(BOOL) ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event
128{
129	NSAssert(NO, @"Layer#ccTouchBegan override me");
130	return YES;
131}
132@end
133
134#pragma mark -
135#pragma mark ColorLayer
136
137@interface CCColorLayer (Private)
138-(void) updateColor;
139@end
140
141@implementation CCColorLayer
142
143// Opacity and RGB color protocol
144@synthesize opacity=opacity_, color=color_;
145@synthesize blendFunc=blendFunc_;
146
147
148+ (id) layerWithColor:(ccColor4B)color width:(GLfloat)w  height:(GLfloat) h
149{
150	return [[[self alloc] initWithColor:color width:w height:h] autorelease];
151}
152
153+ (id) layerWithColor:(ccColor4B)color
154{
155	return [[[self alloc] initWithColor:color] autorelease];
156}
157
158- (id) initWithColor:(ccColor4B)color width:(GLfloat)w  height:(GLfloat) h
159{
160	if( (self=[super init]) ) {
161		
162		// default blend function
163		blendFunc_ = (ccBlendFunc) { CC_BLEND_SRC, CC_BLEND_DST };
164
165		color_.r = color.r;
166		color_.g = color.g;
167		color_.b = color.b;
168		opacity_ = color.a;
169		
170		for (NSUInteger i=0; i<sizeof(squareVertices) / sizeof( squareVertices[0]); i++ )
171			squareVertices[i] = 0.0f;
172				
173		[self updateColor];
174		[self setContentSize:CGSizeMake(w,h)];
175	}
176	return self;
177}
178
179- (id) initWithColor:(ccColor4B)color
180{
181	CGSize s = [[CCDirector sharedDirector] winSize];
182	return [self initWithColor:color width:s.width height:s.height];
183}
184
185// override contentSize
186-(void) setContentSize: (CGSize) size
187{
188	squareVertices[2] = size.width;
189	squareVertices[5] = size.height;
190	squareVertices[6] = size.width;
191	squareVertices[7] = size.height;
192	
193	[super setContentSize:size];
194}
195
196- (void) changeWidth: (GLfloat) w height:(GLfloat) h
197{
198	[self setContentSize:CGSizeMake(w,h)];
199}
200
201-(void) changeWidth: (GLfloat) w
202{
203	[self setContentSize:CGSizeMake(w,contentSize_.height)];
204}
205
206-(void) changeHeight: (GLfloat) h
207{
208	[self setContentSize:CGSizeMake(contentSize_.width,h)];
209}
210
211- (void) updateColor
212{
213	for( NSUInteger i=0; i < sizeof(squareColors) / sizeof(squareColors[0]);i++ )
214	{
215		if( i % 4 == 0 )
216			squareColors[i] = color_.r;
217		else if( i % 4 == 1)
218			squareColors[i] = color_.g;
219		else if( i % 4 ==2  )
220			squareColors[i] = color_.b;
221		else
222			squareColors[i] = opacity_;
223	}
224}
225
226- (void)draw
227{		
228	// Default GL states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_COLOR_ARRAY, GL_TEXTURE_COORD_ARRAY
229	// Needed states: GL_VERTEX_ARRAY, GL_COLOR_ARRAY
230	// Unneeded states: GL_TEXTURE_2D, GL_TEXTURE_COORD_ARRAY
231	glDisableClientState(GL_TEXTURE_COORD_ARRAY);
232	glDisable(GL_TEXTURE_2D);
233
234	glVertexPointer(2, GL_FLOAT, 0, squareVertices);
235	glColorPointer(4, GL_UNSIGNED_BYTE, 0, squareColors);
236	
237	BOOL newBlend = NO;
238	if( blendFunc_.src != CC_BLEND_SRC || blendFunc_.dst != CC_BLEND_DST ) {
239		newBlend = YES;
240		glBlendFunc(blendFunc_.src, blendFunc_.dst);
241	}
242	else if( opacity_ != 255 ) {
243		newBlend = YES;
244		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
245	}
246	
247	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
248	
249	if( newBlend )
250		glBlendFunc(CC_BLEND_SRC, CC_BLEND_DST);
251	
252	// restore default GL state
253	glEnableClientState(GL_TEXTURE_COORD_ARRAY);
254	glEnable(GL_TEXTURE_2D);
255}
256
257#pragma mark Protocols
258// Color Protocol
259
260-(void) setColor:(ccColor3B)color
261{
262	color_ = color;
263	[self updateColor];
264}
265
266-(void) setOpacity: (GLubyte) o
267{
268	opacity_ = o;
269	[self updateColor];
270}
271@end
272
273#pragma mark -
274#pragma mark MultiplexLayer
275
276@implementation CCMultiplexLayer
277+(id) layerWithLayers: (CCLayer*) layer, ... 
278{
279	va_list args;
280	va_start(args,layer);
281	
282	id s = [[[self alloc] initWithLayers: layer vaList:args] autorelease];
283	
284	va_end(args);
285	return s;
286}
287
288-(id) initWithLayers: (CCLayer*) layer vaList:(va_list) params
289{
290	if( (self=[super init]) ) {
291	
292		layers = [[NSMutableArray arrayWithCapacity:5] retain];
293		
294		[layers addObject: layer];
295		
296		CCLayer *l = va_arg(params,CCLayer*);
297		while( l ) {
298			[layers addObject: l];
299			l = va_arg(params,CCLayer*);
300		}
301		
302		enabledLayer = 0;
303		[self addChild: [layers objectAtIndex: enabledLayer]];	
304	}
305	
306	return self;
307}
308
309-(void) dealloc
310{
311	[layers release];
312	[super dealloc];
313}
314
315-(void) switchTo: (unsigned int) n
316{
317	NSAssert( n < [layers count], @"Invalid index in MultiplexLayer switchTo message" );
318		
319	[self removeChild: [layers objectAtIndex:enabledLayer] cleanup:YES];
320	
321	enabledLayer = n;
322	
323	[self addChild: [layers objectAtIndex:n]];		
324}
325
326-(void) switchToAndReleaseMe: (unsigned int) n
327{
328	NSAssert( n < [layers count], @"Invalid index in MultiplexLayer switchTo message" );
329	
330	[self removeChild: [layers objectAtIndex:enabledLayer] cleanup:YES];
331	
332	[layers replaceObjectAtIndex:enabledLayer withObject:[NSNull null]];
333	
334	enabledLayer = n;
335	
336	[self addChild: [layers objectAtIndex:n]];		
337}
338
339@end