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gpu: fold buffer clearing into framebuffer bind

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In Metal, clearing a framebuffer is most efficiently done during bind.
Modify our driver accordingly.

Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2021-08-11 15:03:45 +02:00
parent d38c78d7ac
commit 1af910959b
7 changed files with 71 additions and 61 deletions
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gpu/headless/driver_test.go
+10 -6
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@@ -141,10 +141,12 @@ func TestFramebuffers(t *testing.T) {
col2 = color.NRGBA{R: 0xfe, G: 0xba, B: 0xbe, A: 0xca}
)
fcol1, fcol2 := f32color.LinearFromSRGB(col1), f32color.LinearFromSRGB(col2)
b.BindFramebuffer(fbo1)
b.Clear(fcol1.Float32())
b.BindFramebuffer(fbo2)
b.Clear(fcol2.Float32())
d := driver.LoadDesc{Action: driver.LoadActionClear}
c := &d.ClearColor
c.R, c.G, c.B, c.A = fcol1.Float32()
b.BindFramebuffer(fbo1, d)
c.R, c.G, c.B, c.A = fcol2.Float32()
b.BindFramebuffer(fbo2, d)
img := screenshot(t, b, fbo1, sz)
if got := img.RGBAAt(0, 0); got != f32color.NRGBAToRGBA(col1) {
t.Errorf("got color %v, expected %v", got, f32color.NRGBAToRGBA(col1))
@@ -157,11 +159,13 @@ func TestFramebuffers(t *testing.T) {
func setupFBO(t *testing.T, b driver.Device, size image.Point) driver.Framebuffer {
fbo := newFBO(t, b, size)
b.BindFramebuffer(fbo)
// ClearColor accepts linear RGBA colors, while 8-bit colors
// are in the sRGB color space.
col := f32color.LinearFromSRGB(clearCol)
b.Clear(col.Float32())
d := driver.LoadDesc{Action: driver.LoadActionClear}
c := &d.ClearColor
c.R, c.G, c.B, c.A = col.Float32()
b.BindFramebuffer(fbo, d)
b.Viewport(0, 0, size.X, size.Y)
return fbo
}