Android Extension Pack

In addition to OpenGL ES 3.1, this release provides an extension pack with Java interfaces and native support for advanced graphics functionality. These extensions are treated as a single package by Android. (If the ANDROID_extension_pack_es31a extension is present, your app can assume all extensions in the package are present and enable the shading language features with a single #extension statement.)

The extension pack supports:

• Guaranteed fragment shader support for shader storage buffers, images, and atomics (Fragment shader support is optional in OpenGL ES 3.1.)
• Tessellation and geometry shaders
• ASTC (LDR) texture compression format
• Per-sample interpolation and shading
• Different blend modes for each color attachment in a frame buffer

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