Organizing a Virtual Filesystem - Android NDK Game Development - page 115

2. Image dimensions and raw pixel data are set as follows:

int FWidth;
int FHeight;

3. Here we use a C-style array:

ubyte* FBitmapData;
};

The read_bmp_mem() function from Chapter 2 , Porting Common Libraries, is used
once again, but this time the memory buffer comes from an iIStream object.
In Chapter 6 , Unifying OpenGL ES 3 and OpenGL 3 we add the Texture class to
handle all of the OpenGL complexities, but right now we simply render the instance
of a Bitmap class.

4. Next, we implement the asynchronous loading operation:

class LoadOp_Image: public iTask
{
public:
LoadOp_Image( clPtr<Bitmap> Bmp, clPtr<iIStream> IStream ):
FBmp( Bmp ), FStream( IStream ) {}

virtual void Run()
{
FBmp->Load2DImage( FStream );
g_Events->EnqueueCapsule(
new LoadCompleteCapsule(FBmp) );
}
private:
clPtr<Bitmap> FBmp;
clPtr<iIStream> FStream;
};

5. The LoadCompleteCapsule class is a iAsyncCapsule -derived class that has the

overriden Run() method:
class LoadCompleteCapsule: public iAsyncCapsule
{
public:
LoadCompleteCapsule(clPtr<Bitmap> Bmp): FBmp(Bmp) {}
virtual void Invoke()
{
// … copy FBmp to g_FrameBuffer …
}