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lavapipe: implement VK_EXT_index_type_uint8

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Since Gallium supports 8 bit indices, this extension is a simple matter
of plumbing a value through, exposing a feature and flipping the switch
for the extension. This lets zink avoid up-converting the index-buffer
before drawing.

Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8082>
This commit is contained in:
Erik Faye-Lund 2020-12-14 12:01:40 +01:00 • committed by Marge Bot
parent 2832cbea7a
commit 6526e6d11b
3 changed files with 11 additions and 1 deletions
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7
src/gallium/frontends/lavapipe/lvp_device.c
View file

@ -386,6 +386,13 @@ void lvp_GetPhysicalDeviceFeatures2(
break;
}
case VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_INDEX_TYPE_UINT8_FEATURES_EXT: {
VkPhysicalDeviceIndexTypeUint8FeaturesEXT *features =
(VkPhysicalDeviceIndexTypeUint8FeaturesEXT *)ext;
features->indexTypeUint8 = true;
break;
}
default:
break;
}

3
src/gallium/frontends/lavapipe/lvp_execute.c
View file

@ -1917,6 +1917,9 @@ static void handle_index_buffer(struct lvp_cmd_buffer_entry *cmd,
{
struct lvp_cmd_bind_index_buffer *ib = &cmd->u.index_buffer;
switch (ib->index_type) {
case VK_INDEX_TYPE_UINT8_EXT:
state->index_size = 1;
break;
case VK_INDEX_TYPE_UINT16:
state->index_size = 2;
break;

2
src/gallium/frontends/lavapipe/lvp_extensions.py
View file

@ -123,7 +123,7 @@ EXTENSIONS = [
Extension('VK_EXT_external_memory_host', 1, False),
Extension('VK_EXT_global_priority', 1, False),
Extension('VK_EXT_host_query_reset', 1, False),
Extension('VK_EXT_index_type_uint8', 1, False),
Extension('VK_EXT_index_type_uint8', 1, True),
Extension('VK_EXT_inline_uniform_block', 1, False),
Extension('VK_EXT_memory_budget', 1, False),
Extension('VK_EXT_memory_priority', 1, False),