Analyze and prepare PNG images for ETC1 compression on Android OpenGL ES
ETC1 does not support alpha channel. Here's how your image looks without transparency:
ETC1 (Ericsson Texture Compression 1) is a lossy GPU texture compression format widely used in mobile games and applications.
ETC1 is supported on all OpenGL ES 2.0+ devices, making it ideal for Android games with broad compatibility.
For best GPU performance and driver compatibility, ETC1 textures should have power-of-two dimensions (64, 128, 256, 512, 1024, 2048).
ETC1 only supports RGB (no alpha channel). For transparency, use ETC2 (requires OpenGL ES 3.0) or split alpha into separate texture.
ETC1 compresses textures to 0.5 bytes per pixel (vs 3 bytes for RGB), reducing GPU memory usage significantly.
Encode, decode, measure sizes, and transform common formats.