added bind/unbind to GLRenderbuffer, unbind to GLFramebuffer and GLTe…

…xture. Added glTexSubImage2D wrapper method for textures.

Sources/GLDrawCommand.m

@@ -58,6 +58,7 @@ - (void)setElementIndexes:(GLBuffer*)buffer type:(GLenum)type
 #pragma mark Textures
 - (void)setTexture:(GLTexture*)texture target:(GLenum)target unit:(GLenum)unit
 {
+	GL_EXCEPT(texture == nil, NSInvalidArgumentException);
 	id binder = [NSDictionary dictionaryWithObjectsAndKeys:texture, @"texture", [NSNumber numberWithInt:target],@"target", nil];
 
 	[mTextures setObject:binder forKey:[NSNumber numberWithInt:unit]];

Sources/GLFramebuffer.h

@@ -28,5 +28,6 @@
 
 // Binding
 - (void)bind;
++ (void)unbind;
 
 @end

Sources/GLFramebuffer.m

@@ -134,5 +134,10 @@ - (void)bind
 	GL_EXCEPT(mHandle == 0, @"Trying to bind non-existing buffer");
 	glBindFramebuffer(GL_FRAMEBUFFER, mHandle);
 }
++ (void)unbind
+{
+	glBindFramebuffer(GL_FRAMEBUFFER, 0);
+}
+
 
 @end

Sources/GLRenderbuffer.h

@@ -22,4 +22,9 @@
 - (void)setFromExistingHandle:(GLuint)handle width:(GLsizei)w height:(GLsizei)h internalFormat:(GLenum)iformat;
 - (void)allocateStorageWithWidth:(GLsizei)w height:(GLsizei)h internalFormat:(GLenum)internalFormat ;
 
+// Don't bind a renderbuffer to draw, just bind its associated framebuffer.
+// Bind a renderbuffer to edit/query it with glRenderbuffer*
+- (void)bind;
++ (void)unbind;
+
 @end

Sources/GLRenderbuffer.m

@@ -63,6 +63,8 @@ - (void)allocateStorageWithWidth:(GLsizei)w height:(GLsizei)h internalFormat:(GL
 	glRenderbufferStorage(GL_RENDERBUFFER, internalFormat, w, h);
 	glBindRenderbuffer(GL_RENDERBUFFER, 0);
 
+	GLCheckError();
+
 	mWidth = w;
 	mHeight = h;
 	mInternalFormat = internalFormat;
@@ -75,4 +77,16 @@ - (CGSize)size
 	return CGSizeMake(mWidth, mHeight);
 }
 
+#pragma mark - Binding -
+- (void)bind
+{
+	GL_EXCEPT(mHandle == 0, @"Trying to bind non-existing renderbuffer");
+	glBindRenderbuffer(GL_RENDERBUFFER, mHandle);
+}
++ (void)unbind
+{
+	glBindRenderbuffer(GL_RENDERBUFFER, 0);	
+}
+
+
 @end

Sources/GLTexture.h

@@ -35,9 +35,14 @@
 - (void)loadImage:(const GLvoid *)pixels width:(GLsizei)w height:(GLsizei)h format:(GLenum)format type:(GLenum)type internalFormat:(GLenum)iformat target:(GLenum)target;
 - (void)loadImage:(const GLvoid*)pixels level:(GLint)level width:(GLsizei)w height:(GLsizei)h format:(GLenum)format type:(GLenum)type border:(GLint)border internalFormat:(GLenum)iformat target:(GLenum)target magFilter:(GLenum)magfil minFilter:(GLenum)minfil wrapS:(GLenum)wraps wrapT:(GLenum)wrapt;
 
+// Update part of the texture. pixels is a pointer to the first pixel of the new data.
+- (void)updateImage:(const GLvoid*)pixels level:(GLint)level xOffset:(GLint)xoff yOffset:(GLint)yoff width:(GLsizei)w height:(GLsizei)h format:(GLenum)format type:(GLenum)type target:(GLenum)target;
+
+
 - (void)copyFramebufferImageToLevel:(GLint)level x:(GLint)x y:(GLint)y width:(GLint)w height:(GLint)height border:(GLint)border internalFormat:(GLenum)iformat target:(GLenum)target;
 
 // Binding
 - (void)bind:(GLenum)target;
++ (void)unbind:(GLenum)target;
 
 @end

Sources/GLTexture.m

@@ -90,6 +90,8 @@ - (void)loadImage:(const GLvoid*)pixels level:(GLint)level width:(GLsizei)w heig
 		wrapt = GL_CLAMP_TO_EDGE;
 	}
 
+//	int align = 1;
+//	glPixelStorei(GL_UNPACK_ALIGNMENT, align);
 	glTexParameteri(target, GL_TEXTURE_WRAP_S, wraps);
 	glTexParameteri(target, GL_TEXTURE_WRAP_T, wrapt);
 	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
@@ -106,6 +108,17 @@ - (void)loadImage:(const GLvoid*)pixels level:(GLint)level width:(GLsizei)w heig
 	mBorder = border;
 }
 
+- (void)updateImage:(const GLvoid*)pixels level:(GLint)level xOffset:(GLint)xoff yOffset:(GLint)yoff width:(GLsizei)w height:(GLsizei)h format:(GLenum)format type:(GLenum)type target:(GLenum)target
+{
+	GL_EXCEPT(mHandle == 0, @"Trying to update non-existing buffer");
+
+	glBindTexture(target, mHandle);
+	GLCheckError();
+
+	glTexSubImage2D(target, level, xoff, yoff, w, h, format, type, pixels);
+	GLCheckError();
+}
+
 - (void)copyFramebufferImageToLevel:(GLint)level x:(GLint)x y:(GLint)y width:(GLint)w height:(GLint)h border:(GLint)border internalFormat:(GLenum)iformat target:(GLenum)target
 {
 	if(mHandle == 0) 
@@ -129,6 +142,11 @@ - (void)bind:(GLenum)target
 	glBindTexture(target, mHandle);
 	GLCheckError();
 }
++ (void)unbind:(GLenum)target
+{
+	glBindTexture(target, 0);
+}
+
 #pragma mark -
 #pragma mark Accessors
 - (CGSize)size

iOS/CeedGL_Prefix.pch

@@ -1,5 +1,6 @@
 
 #ifdef __OBJC__
     #import <Foundation/Foundation.h>
+	#import <CoreGraphics/CoreGraphics.h>
 	#import <CeedGL/GLDebug.h>
 #endif