3e2fe2b007
Add some comments explaining why different APIs flip the way they do. Remove flip from Metal code generator and reverse the way flipping occurs in Metal backend. Change-Id: Ibec71e8d96c66d4b34b5ce6417056674090f979c Reviewed-on: https://skia-review.googlesource.com/c/skia/+/413236 Reviewed-by: Brian Osman <brianosman@google.com> Reviewed-by: Jim Van Verth <jvanverth@google.com> Commit-Queue: Brian Salomon <bsalomon@google.com>
21 lines
667 B
Metal
21 lines
667 B
Metal
#include <metal_stdlib>
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#include <simd/simd.h>
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using namespace metal;
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struct Uniforms {
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float4 sk_RTAdjust;
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};
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struct Inputs {
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float4 pos [[attribute(0)]];
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};
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struct Outputs {
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float4 sk_Position [[position]];
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float sk_PointSize [[point_size]];
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};
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vertex Outputs vertexMain(Inputs _in [[stage_in]], constant Uniforms& _uniforms [[buffer(0)]], uint sk_VertexID [[vertex_id]], uint sk_InstanceID [[instance_id]]) {
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Outputs _out;
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(void)_out;
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_out.sk_Position = _in.pos;
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_out.sk_Position = float4(_out.sk_Position.xy * _uniforms.sk_RTAdjust.xz + _out.sk_Position.ww * _uniforms.sk_RTAdjust.yw, 0.0, _out.sk_Position.w);
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return _out;
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}
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