gpu/headless,gpu/internal: rename "backend" files and names to "driver"

Signed-off-by: Elias Naur <mail@eliasnaur.com>
2026-07-03 08:25:34 +00:00 · 2021-03-08 18:20:11 +01:00
parent 69cff4b96b
commit 57750fc8a0
4 changed files with 5 additions and 5 deletions
@@ -0,0 +1,206 @@
+// SPDX-License-Identifier: Unlicense OR MIT
+
+package headless
+
+import (
+	"bytes"
+	"flag"
+	"image"
+	"image/color"
+	"image/png"
+	"io/ioutil"
+	"runtime"
+	"testing"
+
+	"gioui.org/gpu/internal/driver"
+	"gioui.org/internal/f32color"
+	"gioui.org/internal/unsafe"
+)
+
+var dumpImages = flag.Bool("saveimages", false, "save test images")
+
+var clearCol = color.NRGBA{A: 0xff, R: 0xde, G: 0xad, B: 0xbe}
+var clearColExpect = f32color.NRGBAToRGBA(clearCol)
+
+func TestFramebufferClear(t *testing.T) {
+	b := newDriver(t)
+	sz := image.Point{X: 800, Y: 600}
+	fbo := setupFBO(t, b, sz)
+	img := screenshot(t, b, fbo, sz)
+	if got := img.RGBAAt(0, 0); got != clearColExpect {
+		t.Errorf("got color %v, expected %v", got, clearColExpect)
+	}
+}
+
+func TestSimpleShader(t *testing.T) {
+	b := newDriver(t)
+	sz := image.Point{X: 800, Y: 600}
+	fbo := setupFBO(t, b, sz)
+	p, err := b.NewProgram(shader_simple_vert, shader_simple_frag)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer p.Release()
+	b.BindProgram(p)
+	b.DrawArrays(driver.DrawModeTriangles, 0, 3)
+	img := screenshot(t, b, fbo, sz)
+	if got := img.RGBAAt(0, 0); got != clearColExpect {
+		t.Errorf("got color %v, expected %v", got, clearColExpect)
+	}
+	// Just off the center to catch inverted triangles.
+	cx, cy := 300, 400
+	shaderCol := f32color.RGBA{R: .25, G: .55, B: .75, A: 1.0}
+	if got, exp := img.RGBAAt(cx, cy), shaderCol.SRGB(); got != f32color.NRGBAToRGBA(exp) {
+		t.Errorf("got color %v, expected %v", got, f32color.NRGBAToRGBA(exp))
+	}
+}
+
+func TestInputShader(t *testing.T) {
+	b := newDriver(t)
+	sz := image.Point{X: 800, Y: 600}
+	fbo := setupFBO(t, b, sz)
+	p, err := b.NewProgram(shader_input_vert, shader_simple_frag)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer p.Release()
+	b.BindProgram(p)
+	buf, err := b.NewImmutableBuffer(driver.BufferBindingVertices,
+		unsafe.BytesView([]float32{
+			0, .5, .5, 1,
+			-.5, -.5, .5, 1,
+			.5, -.5, .5, 1,
+		}),
+	)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer buf.Release()
+	b.BindVertexBuffer(buf, 4*4, 0)
+	layout, err := b.NewInputLayout(shader_input_vert, []driver.InputDesc{
+		{
+			Type:   driver.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 {
+		t.Errorf("got color %v, expected %v", got, clearColExpect)
+	}
+	cx, cy := 300, 400
+	shaderCol := f32color.RGBA{R: .25, G: .55, B: .75, A: 1.0}
+	if got, exp := img.RGBAAt(cx, cy), shaderCol.SRGB(); got != f32color.NRGBAToRGBA(exp) {
+		t.Errorf("got color %v, expected %v", got, f32color.NRGBAToRGBA(exp))
+	}
+}
+
+func TestFramebuffers(t *testing.T) {
+	b := newDriver(t)
+	sz := image.Point{X: 800, Y: 600}
+	fbo1 := newFBO(t, b, sz)
+	fbo2 := newFBO(t, b, sz)
+	var (
+		col1 = color.NRGBA{R: 0xac, G: 0xbd, B: 0xef, A: 0xde}
+		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())
+	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))
+	}
+	img = screenshot(t, b, fbo2, sz)
+	if got := img.RGBAAt(0, 0); got != f32color.NRGBAToRGBA(col2) {
+		t.Errorf("got color %v, expected %v", got, f32color.NRGBAToRGBA(col2))
+	}
+}
+
+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())
+	b.ClearDepth(0.0)
+	b.Viewport(0, 0, size.X, size.Y)
+	return fbo
+}
+
+func newFBO(t *testing.T, b driver.Device, size image.Point) driver.Framebuffer {
+	fboTex, err := b.NewTexture(
+		driver.TextureFormatSRGB,
+		size.X, size.Y,
+		driver.FilterNearest, driver.FilterNearest,
+		driver.BufferBindingFramebuffer,
+	)
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() {
+		fboTex.Release()
+	})
+	const depthBits = 16
+	fbo, err := b.NewFramebuffer(fboTex, depthBits)
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() {
+		fbo.Release()
+	})
+	return fbo
+}
+
+func newDriver(t *testing.T) driver.Device {
+	ctx, err := newContext()
+	if err != nil {
+		t.Skipf("no context available: %v", err)
+	}
+	runtime.LockOSThread()
+	if err := ctx.MakeCurrent(); err != nil {
+		t.Fatal(err)
+	}
+	b, err := driver.NewDevice(ctx.API())
+	if err != nil {
+		t.Fatal(err)
+	}
+	b.BeginFrame()
+	t.Cleanup(func() {
+		b.EndFrame()
+		ctx.ReleaseCurrent()
+		runtime.UnlockOSThread()
+		ctx.Release()
+	})
+	return b
+}
+
+func screenshot(t *testing.T, d driver.Device, fbo driver.Framebuffer, size image.Point) *image.RGBA {
+	img, err := driver.DownloadImage(d, fbo, image.Rectangle{Max: size})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if *dumpImages {
+		if err := saveImage(t.Name()+".png", img); err != nil {
+			t.Error(err)
+		}
+	}
+	return img
+}
+
+func saveImage(file string, img image.Image) error {
+	var buf bytes.Buffer
+	if err := png.Encode(&buf, img); err != nil {
+		return err
+	}
+	return ioutil.WriteFile(file, buf.Bytes(), 0666)
+}