Support dual source blending #7726

Job	Run time
Clippy cts_runner	52s
Run `cargo deny check advisories`	4m 34s
Run `cargo deny check`	4m 26s
Clippy Windows x86_64	4m 45s
Doctest	52s
Clippy MacOS x86_64	1m 8s
Format	21s
Clippy MacOS aarch64	56s
Test Windows x86_64	10m 24s
Test Mac aarch64	17s
Test WebAssembly	5m 14s
Clippy IOS aarch64	1m 30s
Test Linux x86_64	8m 3s
Clippy Linux x86_64	1m 57s
Clippy Linux aarch64	2m 4s
Clippy Android aarch64	1m 32s
Clippy WebAssembly	1m 48s
Clippy Emscripten	1m 8s
	51m 51s

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