flutter3d_webgl 0.4.0

A WebGL2 backend for flutter3d: the second implementation of flutter3d_hardware, and the one that tells us whether the HAL is a seam or a description of Impeller.

0.4.0

• Shaders and programs are deleted at last. The library gained dispose — every cached stage and every linked program — wired into the device's own, and counted by debugTrackedResourceCount; a failed compile or link deletes its object before throwing instead of leaking one per retry.
• Disposing the device loses the GL context and removes the canvas from the DOM (the platform-view registry still pins the element; it has no unregister). The encoder cleans up its framebuffer and every transient and uniform buffer on any failure path, and a second submit is a StateError rather than resolve blits against a deleted framebuffer. _blitToCanvas no longer leaks a framebuffer per frame when the frame is unreadable.

0.3.0

• Regenerated against the current sources, including the environment sampling and the composite look.

0.2.0

• The GLSL is generated from flutter3d_shaders and CI fails on the diff, after a stale table turned out to be drawing last month's sky in the browser while nothing could see it.
• A pass sets its viewport and scissor to the attachment it draws into rather than to the size of the canvas.

0.1.0

• A WebGL2 backend: the second implementation of flutter3d_hardware, and the one that says whether the HAL is a seam or a description of Impeller.