Add option to download to cpu rgb data ( not only rgba )

Wishlist and RFEs
1

hi
please add option to download to cpu rgb data ( not only rgba )

keep up the great work.
B.

2

Do you mean in the TOP to CHOP? If so you can just remove the “a” channel.
If not, downloading from where to where?

3

virtual void* getTOPDataInCPUMemory(const OP_TOPInput *top,
const OP_TOPInputDownloadOptions *options) const = 0;

enum class OP_CPUMemPixelType : int32_t
{
// 8-bit per color, BGRA pixels. This is preferred for 4 channel 8-bit data
BGRA8Fixed = 0,
// 8-bit per color, RGBA pixels. Only use this one if absolutely nesseary.
RGBA8Fixed,
// 32-bit float per color, RGBA pixels
RGBA32Float,

// A few single and two channel versions of the above
R8Fixed,
RG8Fixed,
R32Float,
RG32Float,

R16Fixed = 100,
RG16Fixed,
RGBA16Fixed,

R16Float = 200,
RG16Float,
RGBA16Float,

};

4

Thanks for the specifics

5

GPUs don’t store their texture data in RGB format. Even the ones that claim to are just also storing an unused A channel. So when downloading the data it’s always reading from R, RG, or RGBA buffers. Generating RGB data requires a CPU reordering either way. With Vulkan coming this is even more strict. So it’s better of the user of the data re-orders if they absolutely need to, as that can be better optimized for their usage case.

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