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gpu/backend: remove clear color and depth state

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Specifying the clear color and depth at the time of clearing is
less error prone and a better for modern GPU APIs. As a bonus, we
can get rid of the BufferAttachment type.

Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2020-03-15 12:20:19 +01:00
parent daecdcaabf
commit 7fba3bb8fe
7 changed files with 24 additions and 53 deletions
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gpu/gpu.go
+3 -4
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@@ -335,9 +335,8 @@ func (g *GPU) BeginFrame() {
}
g.ctx.BindFramebuffer(g.defFBO)
g.ctx.DepthFunc(backend.DepthFuncGreater)
g.ctx.ClearColor(g.drawOps.clearColor.Float32())
g.ctx.ClearDepth(0.0)
g.ctx.Clear(backend.BufferAttachmentColor | backend.BufferAttachmentDepth)
g.ctx.Clear(g.drawOps.clearColor.Float32())
g.ctx.Viewport(0, 0, viewport.X, viewport.Y)
g.renderer.drawZOps(g.drawOps.zimageOps)
g.zopsTimer.end()
@@ -502,7 +501,7 @@ func (r *renderer) stencilClips(pathCache *opCache, ops []*pathOp) {
fbo = p.place.Idx
f := r.pather.stenciler.cover(fbo)
r.ctx.BindFramebuffer(f.fbo)
r.ctx.Clear(backend.BufferAttachmentColor)
r.ctx.Clear(0.0, 0.0, 0.0, 0.0)
}
data, _ := pathCache.get(p.pathKey)
r.pather.stencilPath(p.clip, p.off, p.place.Pos, data.(*pathData))
@@ -525,7 +524,7 @@ func (r *renderer) intersect(ops []imageOp) {
fbo = img.place.Idx
f := r.pather.stenciler.intersections.fbos[fbo]
r.ctx.BindFramebuffer(f.fbo)
r.ctx.Clear(backend.BufferAttachmentColor)
r.ctx.Clear(1.0, 0.0, 0.0, 0.0)
}
r.ctx.Viewport(img.place.Pos.X, img.place.Pos.Y, img.clip.Dx(), img.clip.Dy())
r.intersectPath(img.path, img.clip)