50d0d097c3
Previously, when converting a program, the pipeline stage could assume that an input to main() of type half4/float4 was always the input color. This was a good assumption since the only possible inputs were coordinates, or the input color. This CL now recognizes that when a second float4 is passed to the main() function, it should be a SK_DEST_COLOR_BUILTIN. This will let blend functions pass in two colors. ProgramToSkVM now takes a dest-color argument as well, but existing call sites won't reference it (since they aren't for blend functions). I've just passed the input-color a second time, since the value will never actually be accessed. Change-Id: I4214586bda605c6d287aa25b1b099e6ef5ba15a4 Bug: skia:12080 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/417261 Commit-Queue: John Stiles <johnstiles@google.com> Auto-Submit: John Stiles <johnstiles@google.com> Reviewed-by: Brian Osman <brianosman@google.com>
8 lines
167 B
Plaintext
8 lines
167 B
Plaintext
half4 blend_src_over(half4 src, half4 dst) {
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return src + (1 - src.a)*dst;
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}
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half4 main(half4 src, half4 dst) {
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return blend_src_over(src, half4(1) - dst);
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}
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