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+/*
+ * cocos2d for iPhone: http://www.cocos2d-iphone.org
+ *
+ * Copyright (c) 2008-2010 Ricardo Quesada
+ * Copyright (c) 2011 Zynga Inc.
+ * 
+ * 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.
+ *
+ */
+
+#import <Availability.h>
+#import "CCParticleSystemPoint.h"
+
+#ifdef __IPHONE_OS_VERSION_MAX_ALLOWED
+
+// opengl
+#import "Platforms/CCGL.h"
+
+// cocos2d
+#import "CCTextureCache.h"
+#import "ccMacros.h"
+
+// support
+#import "Support/OpenGL_Internal.h"
+#import "Support/CGPointExtension.h"
+
+@implementation CCParticleSystemPoint
+
+-(id) initWithTotalParticles:(NSUInteger) numberOfParticles
+{
+        if( (self=[super initWithTotalParticles:numberOfParticles]) ) {
+
+                vertices = malloc( sizeof(ccPointSprite) * totalParticles );
+
+                if( ! vertices ) {
+                        NSLog(@"cocos2d: Particle system: not enough memory");
+                        [self release];
+                        return nil;
+                }
+
+#if CC_USES_VBO
+                glGenBuffers(1, &verticesID);
+                
+                // initial binding
+                glBindBuffer(GL_ARRAY_BUFFER, verticesID);
+                glBufferData(GL_ARRAY_BUFFER, sizeof(ccPointSprite)*totalParticles, vertices, GL_DYNAMIC_DRAW);
+                glBindBuffer(GL_ARRAY_BUFFER, 0);
+#endif
+        }
+
+        return self;
+}
+
+-(void) dealloc
+{
+        free(vertices);
+#if CC_USES_VBO
+        glDeleteBuffers(1, &verticesID);
+#endif
+        
+        [super dealloc];
+}
+
+-(void) updateQuadWithParticle:(tCCParticle*)p newPosition:(CGPoint)newPos
+{       
+        // place vertices and colos in array
+        vertices[particleIdx].pos = (ccVertex2F) {newPos.x, newPos.y};
+        vertices[particleIdx].size = p->size;
+        ccColor4B color =  { p->color.r*255, p->color.g*255, p->color.b*255, p->color.a*255 };
+        vertices[particleIdx].color = color;
+}
+
+-(void) postStep
+{
+#if CC_USES_VBO
+        glBindBuffer(GL_ARRAY_BUFFER, verticesID);
+        glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(ccPointSprite)*particleCount, vertices);
+        glBindBuffer(GL_ARRAY_BUFFER, 0);
+#endif
+}
+
+-(void) draw
+{
+        [super draw];
+
+    if (particleIdx==0)
+        return;
+        
+        // Default GL states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_COLOR_ARRAY, GL_TEXTURE_COORD_ARRAY
+        // Needed states: GL_TEXTURE_2D, GL_VERTEX_ARRAY, GL_COLOR_ARRAY
+        // Unneeded states: GL_TEXTURE_COORD_ARRAY
+        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+        
+        glBindTexture(GL_TEXTURE_2D, texture_.name);
+        
+        glEnable(GL_POINT_SPRITE_OES);
+        glTexEnvi( GL_POINT_SPRITE_OES, GL_COORD_REPLACE_OES, GL_TRUE );
+        
+#define kPointSize sizeof(vertices[0])
+
+#if CC_USES_VBO
+        glBindBuffer(GL_ARRAY_BUFFER, verticesID);
+
+        glVertexPointer(2,GL_FLOAT, kPointSize, 0);
+
+        glColorPointer(4, GL_UNSIGNED_BYTE, kPointSize, (GLvoid*) offsetof(ccPointSprite, color) );
+
+        glEnableClientState(GL_POINT_SIZE_ARRAY_OES);
+        glPointSizePointerOES(GL_FLOAT, kPointSize, (GLvoid*) offsetof(ccPointSprite, size) );
+#else // Uses Vertex Array List
+        int offset = (int)vertices;
+        glVertexPointer(2,GL_FLOAT, kPointSize, (GLvoid*) offset);
+        
+        int diff = offsetof(ccPointSprite, color);
+        glColorPointer(4, GL_UNSIGNED_BYTE, kPointSize, (GLvoid*) (offset+diff));
+        
+        glEnableClientState(GL_POINT_SIZE_ARRAY_OES);
+        diff = offsetof(ccPointSprite, size);
+        glPointSizePointerOES(GL_FLOAT, kPointSize, (GLvoid*) (offset+diff));
+#endif
+
+        BOOL newBlend = blendFunc_.src != CC_BLEND_SRC || blendFunc_.dst != CC_BLEND_DST;
+        if( newBlend )
+                glBlendFunc( blendFunc_.src, blendFunc_.dst );
+
+
+        glDrawArrays(GL_POINTS, 0, particleIdx);
+        
+        // restore blend state
+        if( newBlend )
+                glBlendFunc( CC_BLEND_SRC, CC_BLEND_DST);
+
+        
+#if CC_USES_VBO
+        // unbind VBO buffer
+        glBindBuffer(GL_ARRAY_BUFFER, 0);
+#endif
+        
+        glDisableClientState(GL_POINT_SIZE_ARRAY_OES);
+        glDisable(GL_POINT_SPRITE_OES);
+
+        // restore GL default state
+        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+}
+
+#pragma mark Non supported properties
+
+//
+// SPIN IS NOT SUPPORTED
+//
+-(void) setStartSpin:(float)a
+{
+        NSAssert(a == 0, @"PointParticleSystem doesn't support spinning");
+        [super setStartSpin:a];
+}
+-(void) setStartSpinVar:(float)a
+{
+        NSAssert(a == 0, @"PointParticleSystem doesn't support spinning");
+        [super setStartSpin:a];
+}
+-(void) setEndSpin:(float)a
+{
+        NSAssert(a == 0, @"PointParticleSystem doesn't support spinning");
+        [super setStartSpin:a];
+}
+-(void) setEndSpinVar:(float)a
+{
+        NSAssert(a == 0, @"PointParticleSystem doesn't support spinning");
+        [super setStartSpin:a];
+}
+
+//
+// SIZE > 64 IS NOT SUPPORTED
+//
+-(void) setStartSize:(float)size
+{
+        NSAssert(size >= 0 && size <= CC_MAX_PARTICLE_SIZE, @"PointParticleSystem only supports 0 <= size <= 64");
+        [super setStartSize:size];
+}
+
+-(void) setEndSize:(float)size
+{
+        NSAssert( (size == kCCParticleStartSizeEqualToEndSize) ||
+                         ( size >= 0 && size <= CC_MAX_PARTICLE_SIZE), @"PointParticleSystem only supports 0 <= size <= 64");
+        [super setEndSize:size];
+}
+@end
+
+#elif defined(__MAC_OS_X_VERSION_MAX_ALLOWED)
+@implementation CCParticleSystemPoint
+@end
+
+#endif // __MAC_OS_X_VERSION_MAX_ALLOWED
+
+