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gpu: fix clip intersection with the D3D backend

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Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2020-03-10 14:11:36 +01:00
parent acfe91ec3e
commit 61529c2cb6
6 changed files with 145 additions and 19 deletions
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gpu/gpu.go
+7 -1
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@@ -538,15 +538,21 @@ func (r *renderer) intersectPath(p *pathOp, clip image.Rectangle) {
if !p.path {
return
}
o := p.place.Pos.Add(clip.Min).Sub(p.clip.Min)
uv := image.Rectangle{
Min: p.place.Pos,
Max: p.place.Pos.Add(p.clip.Size()),
}
o := clip.Min.Sub(p.clip.Min)
sub := image.Rectangle{
Min: o,
Max: o.Add(clip.Size()),
}
fbo := r.pather.stenciler.cover(p.place.Idx)
r.ctx.BindTexture(0, fbo.tex)
coverScale, coverOff := texSpaceTransform(toRectF(uv), fbo.size)
subScale, subOff := texSpaceTransform(toRectF(sub), p.clip.Size())
r.pather.stenciler.iprog.uniforms.vert.uvTransform = [4]float32{coverScale.X, coverScale.Y, coverOff.X, coverOff.Y}
r.pather.stenciler.iprog.uniforms.vert.subUVTransform = [4]float32{subScale.X, subScale.Y, subOff.X, subOff.Y}
r.pather.stenciler.iprog.prog.UploadUniforms()
r.ctx.DrawArrays(backend.DrawModeTriangleStrip, 0, 4)
}