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gpu: introduce pipeline abstraction

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Modern API such as Metal and Vulkan want clients to compile expensive
state changes into pipeline objects. Change our GPU driver abstraction
to match, thereby paving the way for future drivers.

Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2021-08-10 16:18:47 +02:00
parent 13b93b27d8
commit afaa31eca8
9 changed files with 548 additions and 400 deletions
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gpu/headless/driver_test.go
+45 -17
View File
@@ -38,12 +38,22 @@ func TestSimpleShader(t *testing.T) {
b := newDriver(t)
sz := image.Point{X: 800, Y: 600}
fbo := setupFBO(t, b, sz)
p, err := b.NewProgram(gio.Shader_simple_vert, gio.Shader_simple_frag)
vsh, fsh, err := newShaders(b, gio.Shader_simple_vert, gio.Shader_simple_frag)
if err != nil {
t.Fatal(err)
}
defer vsh.Release()
defer fsh.Release()
p, err := b.NewPipeline(driver.PipelineDesc{
VertexShader: vsh,
FragmentShader: fsh,
PixelFormat: driver.TextureFormatSRGBA,
})
if err != nil {
t.Fatal(err)
}
defer p.Release()
b.BindProgram(p)
b.BindPipeline(p)
b.DrawArrays(driver.DrawModeTriangles, 0, 3)
img := screenshot(t, b, fbo, sz)
if got := img.RGBAAt(0, 0); got != clearColExpect {
@@ -61,12 +71,30 @@ func TestInputShader(t *testing.T) {
b := newDriver(t)
sz := image.Point{X: 800, Y: 600}
fbo := setupFBO(t, b, sz)
p, err := b.NewProgram(gio.Shader_input_vert, gio.Shader_simple_frag)
vsh, fsh, err := newShaders(b, gio.Shader_input_vert, gio.Shader_simple_frag)
if err != nil {
t.Fatal(err)
}
defer p.Release()
b.BindProgram(p)
defer vsh.Release()
defer fsh.Release()
layout := []shader.InputDesc{
{
Type: shader.DataTypeFloat,
Size: 4,
Offset: 0,
},
}
pipe, err := b.NewPipeline(driver.PipelineDesc{
VertexShader: vsh,
FragmentShader: fsh,
VertexLayout: layout,
PixelFormat: driver.TextureFormatSRGBA,
})
if err != nil {
t.Fatal(err)
}
defer pipe.Release()
b.BindPipeline(pipe)
buf, err := b.NewImmutableBuffer(driver.BufferBindingVertices,
byteslice.Slice([]float32{
0, .5, .5, 1,
@@ -79,18 +107,6 @@ func TestInputShader(t *testing.T) {
}
defer buf.Release()
b.BindVertexBuffer(buf, 4*4, 0)
layout, err := b.NewInputLayout(gio.Shader_input_vert, []shader.InputDesc{
{
Type: shader.DataTypeFloat,
Size: 4,
Offset: 0,
},
})
if err != nil {
t.Fatal(err)
}
defer layout.Release()
b.BindInputLayout(layout)
b.DrawArrays(driver.DrawModeTriangles, 0, 3)
img := screenshot(t, b, fbo, sz)
if got := img.RGBAAt(0, 0); got != clearColExpect {
@@ -103,6 +119,18 @@ func TestInputShader(t *testing.T) {
}
}
func newShaders(ctx driver.Device, vsrc, fsrc shader.Sources) (vert driver.VertexShader, frag driver.FragmentShader, err error) {
vert, err = ctx.NewVertexShader(vsrc)
if err != nil {
return
}
frag, err = ctx.NewFragmentShader(fsrc)
if err != nil {
vert.Release()
}
return
}
func TestFramebuffers(t *testing.T) {
b := newDriver(t)
sz := image.Point{X: 800, Y: 600}