// todo for tomorrow
// stop allocating meshes, pool materials
// handle not drawing screen aligned clipping bounds
// handle multiple clip shapes in a path
// maybe handle textures
// handle lots of clip shapes
// handle masking channels
// profile
public void ConstructClipData()
{
maskPackerR.Clear();
maskPackerG.Clear();
maskPackerB.Clear();
maskPackerA.Clear();
// todo -- profile sorting by size
// might not need the -1 if screen level one is never sent
// also don't need to render clipper for a view since it is automatically rectangular
// basically any pure screen aligned rectangle doesn't need to be rendered out
for (int i = 0; i < clippers.size; i++)
{
ClipData clipData = clippers.array[i];
if (clipData.clipPath == null)
{
float xy = VertigoUtil.PackSizeVector(new Vector2(clipData.aabb.x, clipData.aabb.y));
float zw = VertigoUtil.PackSizeVector(new Vector2(clipData.aabb.z, clipData.aabb.w));
clipData.packedBoundsAndChannel.x = xy;
clipData.packedBoundsAndChannel.y = zw;
continue;
}
clipData.zIndex = i + 1; // will have to change depending on how we decide to handle different channels
int width = (int)(clipData.aabb.z - clipData.aabb.x);
int height = (int)(clipData.aabb.w - clipData.aabb.y);
SimpleRectPacker.PackedRect region;
clipData.textureChannel = -1;
if (maskPackerR.TryPackRect(width, height, out region))
{
clipData.textureChannel = 0;
}
// todo -- other channels don't work right now, need to figure out if we use additional draw calls or super double dip region packing
// else if (maskPackerG.TryPackRect(width, height, out region)) {
// clipData.textureChannel = 1;
// }
// else if (maskPackerB.TryPackRect(width, height, out region)) {
// clipData.textureChannel = 2;
// }
// else if (maskPackerA.TryPackRect(width, height, out region)) {
// clipData.textureChannel = 3;
// }
else
{
Debug.Log($"Can't fit {width}, {height} into clip texture");
}
// note this is in 2 point form, not height & width
if (clipData.textureChannel != -1)
{
clipData.clipTexture = clipTexture;
clipData.textureRegion = region;
clipData.clipUVs = new Vector4(
region.xMin / (float)clipTexture.width,
region.yMin / (float)clipTexture.height,
region.xMax / (float)clipTexture.width,
region.yMax / (float)clipTexture.height
);
float xy = VertigoUtil.PackSizeVector(new Vector2(clipData.aabb.x, clipData.aabb.y));
float zw = VertigoUtil.PackSizeVector(new Vector2(clipData.aabb.z, clipData.aabb.w));
clipData.packedBoundsAndChannel.x = xy;
clipData.packedBoundsAndChannel.y = zw;
clipData.packedBoundsAndChannel.z = clipData.textureChannel;
}
}
}
// depth buffer means our regions are locked per channel
// 2 options: 1. each channel is its own set of draw calls, this is easy but maybe not as fast. do this as a first pass
// 2. try to re-use regions for different channels, almost certainly leads to less throughput but faster since we don't need extra draw calls
// probably means we have sub-sorting regions, ie large packers would have sub-packers
// would definitely want to sort by size in that case and first try to pack larger regions into themselves
// would likely update rect packer to be channel aware, when trying to place next item instead of moving over try colliding a different channel instead
public void Clip(Camera camera, CommandBuffer commandBuffer)
{
// breaks on refresh if we don't do this :(
this.clearMaterial.SetColor(s_Color, Color.white);
this.clearCountMaterial.SetColor(s_Color, new Color(0, 0, 0, 0));
requireRegionCounting = false;
for (int i = 0; i < batchesToRender.size; i++)
{
batchesToRender[i].pooledMesh.Release();
StructList <Matrix4x4> .Release(ref batchesToRender.array[i].transforms);
StructList <Vector4> .Release(ref batchesToRender.array[i].objectData);
StructList <Vector4> .Release(ref batchesToRender.array[i].colorData);
}
batchesToRender.Clear();
Gather();
Vector3 cameraOrigin = camera.transform.position;
cameraOrigin.x -= 0.5f * Screen.width;
cameraOrigin.y += (0.5f * Screen.height);
cameraOrigin.z += 2;
Matrix4x4 origin = Matrix4x4.TRS(cameraOrigin, Quaternion.identity, Vector3.one);
LightList <ClipData> texturedClippers = LightList <ClipData> .Get();
regionMesh?.Release();
regionMesh = GetRegionMesh(out requireRegionCounting);
clipTexture = RenderTexture.GetTemporary(Screen.width, Screen.height, 24, RenderTextureFormat.Default); // todo -- use lower resolution
#if DEBUG
commandBuffer.BeginSample("UIFora Clip Draw");
#endif
commandBuffer.SetRenderTarget(clipTexture);
// probably don't need this actually, can bake it into clear. keep for debugging
commandBuffer.ClearRenderTarget(true, true, Color.black);
commandBuffer.DrawMesh(regionMesh.mesh, origin, clearMaterial, 0, 0);
// todo -- handle multiple shapes from one path
ClipBatch batch = new ClipBatch();
batch.transforms = StructList <Matrix4x4> .Get();
batch.colorData = StructList <Vector4> .Get();
batch.objectData = StructList <Vector4> .Get();
for (int i = 0; i < clippers.size; i++)
{
ClipData clipData = clippers[i];
Path2D clipPath = clipData.clipPath;
if (clipPath == null)
{
// todo if transform is not identity we need to generate a rotated or skewed rect for the clip shape
continue;
}
clipPath.UpdateGeometry(); // should early out if no update required
if (AnyShapeUsesTextures(clipPath))
{
// todo -- handle textures
// todo -- handle text
continue;
}
batch = DrawShapesInPath(batch, clipPath, clipData, clipData);
for (int j = 0; j < clipData.dependents.size; j++)
{
batch = DrawShapesInPath(batch, clipPath, clipData, clipData.dependents[j]);
}
}
FinalizeBatch(batch, false);
for (int i = 0; i < batchesToRender.size; i++)
{
ref ClipBatch clipBatch = ref batchesToRender.array[i];
ClipPropertyBlock propertyBlock = clipMaterialPool.GetPropertyBlock(clipBatch.transforms.size);
propertyBlock.SetData(clipBatch);
commandBuffer.DrawMesh(clipBatch.pooledMesh.mesh, origin, clipDrawMaterial, 0, 0, propertyBlock.matBlock);
}
internal void AddClipper(ClipData clipData)
{
clippers.Add(clipData);
}