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android: fix texture rendertarget sample for vk (#9528)

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- add a flag to run the sample using regular, non-external
   texture as render target.
 - Add a non-external version of the material
 - vk: fix y-flipping issue with uvToRenderTargetUV()
This commit is contained in:
Powei Feng
2025-12-19 14:15:22 -08:00
committed by GitHub
parent 1e3ab83e6a
commit a8ee9d473e
3 changed files with 60 additions and 20 deletions
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56
android/samples/sample-texture-target/src/main/java/com/google/android/filament/texturetarget/MainActivity.kt
View File

@@ -76,11 +76,16 @@ class MainActivity : Activity() {
private var texture: Texture? = null
private var renderTarget: RenderTarget? = null
private var useExternalTexture = true
private lateinit var offscreenView: View
private lateinit var offscreenCamera: Camera
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
// To use set this flag with adb, run
// adb shell am start -n com.google.android.filament.texturetarget/.MainActivity --ez useExternalTexture false
useExternalTexture = intent.getBooleanExtra("useExternalTexture", true)
surfaceView = SurfaceView(this)
setContentView(surfaceView)
choreographer = Choreographer.getInstance()
@@ -173,8 +178,15 @@ class MainActivity : Activity() {
readUncompressedAsset("materials/baked_color.filamat").let {
triangleMaterial = Material.Builder().payload(it, it.remaining()).build(engine)
}
readUncompressedAsset("materials/textured.filamat").let {
texturedMaterial = Material.Builder().payload(it, it.remaining()).build(engine)
if (useExternalTexture) {
readUncompressedAsset("materials/texturedExternal.filamat").let {
texturedMaterial = Material.Builder().payload(it, it.remaining()).build(engine)
}
} else {
readUncompressedAsset("materials/textured.filamat").let {
texturedMaterial = Material.Builder().payload(it, it.remaining()).build(engine)
}
}
}
@@ -385,33 +397,41 @@ class MainActivity : Activity() {
texture?.let { engine.destroyTexture(it) }
hardwareBuffer?.close()
// Create a new render target.
hardwareBuffer = HardwareBuffer.create(width, height,
HardwareBuffer.RGBA_8888, 1,
HardwareBuffer.USAGE_GPU_SAMPLED_IMAGE or HardwareBuffer.USAGE_GPU_COLOR_OUTPUT)
if (useExternalTexture) {
// Create a new render target.
hardwareBuffer = HardwareBuffer.create(width, height,
HardwareBuffer.RGBA_8888, 1,
HardwareBuffer.USAGE_GPU_SAMPLED_IMAGE or HardwareBuffer.USAGE_GPU_COLOR_OUTPUT)
texture = Texture.Builder()
.width(width)
.height(height)
.usage(Texture.Usage.COLOR_ATTACHMENT or Texture.Usage.SAMPLEABLE)
.sampler(Texture.Sampler.SAMPLER_EXTERNAL)
.format(Texture.InternalFormat.RGBA8)
.external()
.build(engine)
texture = Texture.Builder()
.width(width)
.height(height)
.usage(Texture.Usage.COLOR_ATTACHMENT or Texture.Usage.SAMPLEABLE)
.sampler(Texture.Sampler.SAMPLER_EXTERNAL)
.format(Texture.InternalFormat.RGBA8)
.external()
.build(engine)
texture!!.setExternalImage(engine, hardwareBuffer!!)
texture!!.setExternalImage(engine, hardwareBuffer!!)
} else {
texture = Texture.Builder()
.width(width)
.height(height)
.levels(1)
.usage(Texture.Usage.COLOR_ATTACHMENT or Texture.Usage.SAMPLEABLE)
.format(Texture.InternalFormat.RGBA8)
.build(engine)
}
renderTarget = RenderTarget.Builder()
.texture(RenderTarget.AttachmentPoint.COLOR, texture!!)
.build(engine)
offscreenView.renderTarget = renderTarget
// Set the texture on the quad material.
texturedMaterial.defaultInstance.setParameter("texture", texture!!,
TextureSampler(TextureSampler.MinFilter.LINEAR, TextureSampler.MagFilter.LINEAR,
TextureSampler.WrapMode.CLAMP_TO_EDGE))
TextureSampler.WrapMode.CLAMP_TO_EDGE))
FilamentHelper.synchronizePendingFrames(engine)
}
}

4
android/samples/sample-texture-target/src/main/materials/textured.mat
View File

@@ -3,7 +3,7 @@ material {
shadingModel : unlit,
parameters : [
{
type : samplerExternal,
type : sampler2d,
name : texture
}
],
@@ -15,6 +15,6 @@ material {
fragment {
void material(inout MaterialInputs material) {
prepareMaterial(material);
material.baseColor = texture(materialParams_texture, getUV0());
material.baseColor = texture(materialParams_texture, uvToRenderTargetUV(getUV0()));
}
}

20
android/samples/sample-texture-target/src/main/materials/texturedExternal.mat Normal file
View File

@@ -0,0 +1,20 @@
material {
name : textured,
shadingModel : unlit,
parameters : [
{
type : samplerExternal,
name : texture
}
],
requires: [
uv0
]
}
fragment {
void material(inout MaterialInputs material) {
prepareMaterial(material);
material.baseColor = texture(materialParams_texture, uvToRenderTargetUV(getUV0()));
}
}