PVR and PNG on iOS

The PVR format is an iOS display chip that can be directly read without parsing and can be displayed directly, so the rendering speed is faster and saves memory.

Zwoptex has an item called "CCZ compression", the size of the image can be reduced by almost half. The file format is: Xxx.pvr.ccz,cocos2d is recognizable. PVRTC2And PVRTC4are two PVR compressed image formats, both of which are PVR files. Both image formats have faster loading speeds and smaller memory footprint than normal images. PVRTC4: Compressed format, 4 bits per pixel, OK image quality PVRTC2: Compressed format, 2 bits per pixel, poor image quality general PVR format files have: RGBA8888: 32-bit texture with alpha channel, best image quality RGBA4444: 16-bit texture with alpha channel, good image quality RGB565: 16-bit texture without alpha channel, good image quality but no alpha (transparency) image takes up the memory formula: numbytes = width * Height * bitsperpixel/8That is to say, 2048*2048 RGBA8888 takes up 16MB of memory, while PVRTC4 consumes only 2MB

PVR and PNG on iOS