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vulkan: Add a helper for swizzling color values

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Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24326>
This commit is contained in:
Faith Ekstrand 2023-01-30 20:12:01 -06:00 • committed by Marge Bot
parent 55483d8c7c
commit 39958c9e9d
2 changed files with 33 additions and 0 deletions
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29
src/vulkan/util/vk_format.c
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@ -624,3 +624,32 @@ vk_format_get_ycbcr_info(VkFormat format)
return info;
}
static uint32_t
swizzled_color_component(const VkClearColorValue *color,
VkComponentSwizzle swizzle,
uint32_t comp, bool is_int)
{
switch (swizzle) {
case VK_COMPONENT_SWIZZLE_IDENTITY: return color->uint32[comp];
case VK_COMPONENT_SWIZZLE_ZERO: return 0;
case VK_COMPONENT_SWIZZLE_ONE: return is_int ? 1 : 0x3f800000;
case VK_COMPONENT_SWIZZLE_R: return color->uint32[0];
case VK_COMPONENT_SWIZZLE_G: return color->uint32[1];
case VK_COMPONENT_SWIZZLE_B: return color->uint32[2];
case VK_COMPONENT_SWIZZLE_A: return color->uint32[3];
default: unreachable("Invalid component swizzle");
}
}
VkClearColorValue
vk_swizzle_color_value(VkClearColorValue color,
VkComponentMapping swizzle, bool is_int)
{
return (VkClearColorValue) { .uint32 = {
swizzled_color_component(&color, swizzle.r, 0, is_int),
swizzled_color_component(&color, swizzle.g, 1, is_int),
swizzled_color_component(&color, swizzle.b, 2, is_int),
swizzled_color_component(&color, swizzle.a, 3, is_int),
}};
}

4
src/vulkan/util/vk_format.h
View file

@ -238,6 +238,10 @@ vk_format_get_plane_count(VkFormat format)
return ycbcr_info ? ycbcr_info->n_planes : 1;
}
VkClearColorValue
vk_swizzle_color_value(VkClearColorValue color,
VkComponentMapping swizzle, bool is_int);
#ifdef __cplusplus
}
#endif