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Snap path sprites to pixel grid

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Co-Authored-By: Max Brunsfeld <max@zed.dev>
This commit is contained in:
Antonio Scandurra 2021-03-30 19:37:49 +02:00
parent 1903f63c45
commit da1960c3e8
2 changed files with 8 additions and 3 deletions
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2
gpui/src/platform/mac/renderer.rs
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@ -160,7 +160,7 @@ impl Renderer {
layer_id, layer_id,
atlas_id, atlas_id,
sprite: shaders::GPUISprite { sprite: shaders::GPUISprite {
origin: origin.to_float2(), origin: origin.floor().to_float2(),
size: size.to_float2(), size: size.to_float2(),
atlas_origin: atlas_origin.to_float2(), atlas_origin: atlas_origin.to_float2(),
color: path.color.to_uchar4(), color: path.color.to_uchar4(),

9
gpui/src/platform/mac/shaders/shaders.metal
View file

@ -193,6 +193,8 @@ vertex SpriteFragmentInput sprite_vertex(
}; };
} }
#define MAX_WINDINGS 8.
fragment float4 sprite_fragment( fragment float4 sprite_fragment(
SpriteFragmentInput input [[stage_in]], SpriteFragmentInput input [[stage_in]],
texture2d<float> atlas [[ texture(GPUISpriteFragmentInputIndexAtlas) ]] texture2d<float> atlas [[ texture(GPUISpriteFragmentInputIndexAtlas) ]]
@ -202,7 +204,10 @@ fragment float4 sprite_fragment(
float4 sample = atlas.sample(atlas_sampler, input.atlas_position); float4 sample = atlas.sample(atlas_sampler, input.atlas_position);
float mask; float mask;
if (input.compute_winding) { if (input.compute_winding) {
mask = fmod(sample.r * 255., 2.); mask = fmod(sample.r * MAX_WINDINGS, 2.);
if (mask > 1) {
mask = 2. - mask;
}
} else { } else {
mask = sample.a; mask = sample.a;
} }
@ -239,6 +244,6 @@ fragment float4 path_winding_fragment(
); );
float f = (input.st_position.x * input.st_position.x) - input.st_position.y; float f = (input.st_position.x * input.st_position.x) - input.st_position.y;
float distance = f / length(gradient); float distance = f / length(gradient);
float alpha = saturate(0.5 - distance) / 255.; float alpha = saturate(0.5 - distance) / MAX_WINDINGS;
return float4(alpha, 0., 0., 1.); return float4(alpha, 0., 0., 1.);
} }