B.3. ASTC Compressed Image Formats

ASTC formats are described in the “ASTC Compressed Texture Image Formats” chapter of the Khronos Data Format Specification.

Table B.3. Mapping of Vulkan ASTC formats to descriptions

VkFormat Compressed texel block dimensions sRGB-encoded

VK_FORMAT_ASTC_4x4_UNORM_BLOCK

$4\times 4$

No

VK_FORMAT_ASTC_4x4_SRGB_BLOCK

$4\times 4$

Yes

VK_FORMAT_ASTC_5x4_UNORM_BLOCK

$5\times 4$

No

VK_FORMAT_ASTC_5x4_SRGB_BLOCK

$5\times 4$

Yes

VK_FORMAT_ASTC_5x5_UNORM_BLOCK

$5\times 5$

No

VK_FORMAT_ASTC_5x5_SRGB_BLOCK

$5\times 5$

Yes

VK_FORMAT_ASTC_6x5_UNORM_BLOCK

$6\times 5$

No

VK_FORMAT_ASTC_6x5_SRGB_BLOCK

$6\times 5$

Yes

VK_FORMAT_ASTC_6x6_UNORM_BLOCK

$6\times 6$

No

VK_FORMAT_ASTC_6x6_SRGB_BLOCK

$6\times 6$

Yes

VK_FORMAT_ASTC_8x5_UNORM_BLOCK

$8\times 5$

No

VK_FORMAT_ASTC_8x5_SRGB_BLOCK

$8\times 5$

Yes

VK_FORMAT_ASTC_8x6_UNORM_BLOCK

$8\times 6$

No

VK_FORMAT_ASTC_8x6_SRGB_BLOCK

$8\times 6$

Yes

VK_FORMAT_ASTC_8x8_UNORM_BLOCK

$8\times 8$

No

VK_FORMAT_ASTC_8x8_SRGB_BLOCK

$8\times 8$

Yes

VK_FORMAT_ASTC_10x5_UNORM_BLOCK

$10\times 5$

No

VK_FORMAT_ASTC_10x5_SRGB_BLOCK

$10\times 5$

Yes

VK_FORMAT_ASTC_10x6_UNORM_BLOCK

$10\times 6$

No

VK_FORMAT_ASTC_10x6_SRGB_BLOCK

$10\times 6$

Yes

VK_FORMAT_ASTC_10x8_UNORM_BLOCK

$10\times 8$

No

VK_FORMAT_ASTC_10x8_SRGB_BLOCK

$10\times 8$

Yes

VK_FORMAT_ASTC_10x10_UNORM_BLOCK

$10\times 10$

No

VK_FORMAT_ASTC_10x10_SRGB_BLOCK

$10\times 10$

Yes

VK_FORMAT_ASTC_12x10_UNORM_BLOCK

$12\times 10$

No

VK_FORMAT_ASTC_12x10_SRGB_BLOCK

$12\times 10$

Yes

VK_FORMAT_ASTC_12x12_UNORM_BLOCK

$12\times 12$

No

VK_FORMAT_ASTC_12x12_SRGB_BLOCK

$12\times 12$

Yes