const FAtlasedTextureSlot* AddSprite(UPaperSprite* Sprite)
{
const FVector2D SpriteSizeFloat = Sprite->GetSourceSize();
const FIntPoint SpriteSize(FMath::TruncToInt(SpriteSizeFloat.X), FMath::TruncToInt(SpriteSizeFloat.Y));
TArray<uint8> DummyBuffer;
DummyBuffer.AddZeroed(SpriteSize.X * SpriteSize.Y * Stride);
check(Sprite->GetSourceTexture());
FTextureSource& SourceData = Sprite->GetSourceTexture()->Source;
//@TODO: Handle different texture formats!
if (SourceData.GetFormat() == TSF_BGRA8)
{
uint32 BytesPerPixel = SourceData.GetBytesPerPixel();
uint8* OffsetSource = SourceData.LockMip(0) + (FMath::TruncToInt(Sprite->GetSourceUV().X) + FMath::TruncToInt(Sprite->GetSourceUV().Y) * SourceData.GetSizeX()) * BytesPerPixel;
uint8* OffsetDest = DummyBuffer.GetData();
CopyTextureData(OffsetSource, OffsetDest, SpriteSize.X, SpriteSize.Y, BytesPerPixel, SourceData.GetSizeX() * BytesPerPixel, SpriteSize.X * BytesPerPixel);
SourceData.UnlockMip(0);
}
else
{
UE_LOG(LogPaper2DEditor, Error, TEXT("Sprite %s is not BGRA8, which isn't supported in atlases yet"), *(Sprite->GetPathName()));
}
const FAtlasedTextureSlot* Slot = AddTexture(SpriteSize.X, SpriteSize.Y, DummyBuffer);
if (Slot != nullptr)
{
SpriteToSlotMap.Add(Sprite, Slot);
}
return Slot;
}
bool FPaperAtlasTextureHelpers::ReadSpriteTexture(UTexture* SourceTexture, const FIntPoint& SourceXY, const FIntPoint& SourceSize, TArray<uint8>& TargetBuffer)
{
{
const int32 BytesPerPixel = 4;
TargetBuffer.Empty();
TargetBuffer.AddZeroed(SourceSize.X * SourceSize.Y * BytesPerPixel);
}
check(SourceTexture);
FTextureSource& SourceData = SourceTexture->Source;
if (SourceData.GetFormat() == TSF_BGRA8)
{
uint32 BytesPerPixel = SourceData.GetBytesPerPixel();
uint8* OffsetSource = SourceData.LockMip(0) + (SourceXY.X + SourceXY.Y * SourceData.GetSizeX()) * BytesPerPixel;
uint8* OffsetDest = TargetBuffer.GetData();
CopyTextureData(OffsetSource, OffsetDest, SourceSize.X, SourceSize.Y, BytesPerPixel, SourceData.GetSizeX() * BytesPerPixel, SourceSize.X * BytesPerPixel);
SourceData.UnlockMip(0);
}
else
{
UE_LOG(LogPaper2DEditor, Error, TEXT("Sprite texture %s is not BGRA8, which isn't supported in atlases yet"), *SourceTexture->GetName());
}
return true;
}
