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Vulkan: Add support for Framebuffer Depth Blit #112674

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Jeroen Bakker merged 8 commits from Jeroen-Bakker/blender:vulkan/framebuffer-blit-depth into main 2023-09-28 10:00:32 +02:00
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Jeroen Bakker commented 2023-09-21 16:07:35 +02:00
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This PR adds support for GPU_framebuffer_blit When used with GPU_DEPTH_BIT.
The challenge with is that not all GPUs support using a depth texture as a blit destination.

An AMD GPU doesn't support a depth buffer with stencil buffer as blit destination.
image

NOTE: AMD GPUs don't support 24 bit unsigned normalized depth textures at all.

In all cases when we use depth blitting we are blitting the whole texture
and in stead we can use a texture copy.

A negative effect is that we need to unbind the framebuffer when copying
depth textures, but a positive effect is that we can use a data transfer function what should
theoretically be faster.

This should be revisited when we are investigating in areas to improve the
performance of the Vulkan backend.

This PR adds support for `GPU_framebuffer_blit` When used with `GPU_DEPTH_BIT`. The challenge with is that not all GPUs support using a depth texture as a blit destination. An AMD GPU doesn't support a depth buffer with stencil buffer as blit destination. ![image](/attachments/130e7e38-2dbc-4653-950c-2234bd5bad52) > NOTE: AMD GPUs don't support 24 bit unsigned normalized depth textures at all. In all cases when we use depth blitting we are blitting the whole texture and in stead we can use a texture copy. A negative effect is that we need to unbind the framebuffer when copying depth textures, but a positive effect is that we can use a data transfer function what should theoretically be faster. This should be revisited when we are investigating in areas to improve the performance of the Vulkan backend.
image.png
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Jeroen Bakker added this to the 4.0 milestone 2023-09-21 16:07:35 +02:00
Jeroen Bakker added the
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Jeroen Bakker self-assigned this 2023-09-21 16:07:35 +02:00
Jeroen Bakker added 1 commit 2023-09-21 16:07:47 +02:00
Jeroen Bakker added this to the EEVEE & Viewport project 2023-09-21 16:08:19 +02:00
Jeroen Bakker added 1 commit 2023-09-22 08:26:15 +02:00
Jeroen Bakker added 2 commits 2023-09-22 11:28:51 +02:00
Jeroen Bakker added 2 commits 2023-09-26 14:05:08 +02:00
Jeroen Bakker added 2 commits 2023-09-28 09:42:44 +02:00
Jeroen Bakker modified the milestone from 4.0 to 4.1 2023-09-28 09:56:00 +02:00
Jeroen Bakker changed title from WIP: Vulkan: Add support for Framebuffer Depth Blit to Vulkan: Add support for Framebuffer Depth Blit 2023-09-28 09:57:18 +02:00
Jeroen Bakker merged commit ad93324580 into main 2023-09-28 10:00:32 +02:00
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