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authorJuan Linietsky <reduzio@gmail.com>2022-09-05 21:11:34 +0200
committerJuan Linietsky <reduzio@gmail.com>2022-12-20 11:26:30 +0100
commit71d21c7ccb9a78f573d674e717906012c7a5eb39 (patch)
tree9d50d510979d43b990d7c8783839d6975672b467 /servers/rendering
parent00fa4e23e4b967291034ea7bb018dea638b37e8f (diff)
Implement basic ASTC support
Implements basic ASTC support: * Only 4x4 and 8x8 block sizes. * Other block sizes are too complex to handle for Godot image compression handling. May be implemented sometime in the future. The need for ASTC is mostly for the following use cases: * Implement a high quality compression option for textures on mobile and M1 Apple hardware. * For this, the 4x4 is sufficient, since it uses the same size as BPTC. ASTC supports a lot of block sizes, but the benefit of supporting most of them is slim, while the implementation complexity in Godot is very high. Supporting only 4x4 (and 8x8) solves the real problem, which is lack of a BPTC alternative on hardware where it's missing. Note: This does not yet support encoding on import, an ASTC encoder will need to be added.
Diffstat (limited to 'servers/rendering')
-rw-r--r--servers/rendering/renderer_rd/storage_rd/texture_storage.cpp40
1 files changed, 40 insertions, 0 deletions
diff --git a/servers/rendering/renderer_rd/storage_rd/texture_storage.cpp b/servers/rendering/renderer_rd/storage_rd/texture_storage.cpp
index b87b4d4a0f..247c630095 100644
--- a/servers/rendering/renderer_rd/storage_rd/texture_storage.cpp
+++ b/servers/rendering/renderer_rd/storage_rd/texture_storage.cpp
@@ -1740,6 +1740,46 @@ Ref<Image> TextureStorage::_validate_texture_format(const Ref<Image> &p_image, T
r_format.swizzle_b = RD::TEXTURE_SWIZZLE_ZERO;
r_format.swizzle_a = RD::TEXTURE_SWIZZLE_ONE;
} break;
+ case Image::FORMAT_ASTC_4x4:
+ case Image::FORMAT_ASTC_4x4_HDR: {
+ if (RD::get_singleton()->texture_is_format_supported_for_usage(RD::DATA_FORMAT_ASTC_4x4_UNORM_BLOCK, RD::TEXTURE_USAGE_SAMPLING_BIT | RD::TEXTURE_USAGE_CAN_UPDATE_BIT)) {
+ r_format.format = RD::DATA_FORMAT_ASTC_4x4_UNORM_BLOCK;
+ if (p_image->get_format() == Image::FORMAT_ASTC_4x4) {
+ r_format.format_srgb = RD::DATA_FORMAT_ASTC_4x4_SRGB_BLOCK;
+ }
+ } else {
+ //not supported, reconvert
+ r_format.format = RD::DATA_FORMAT_R8G8B8A8_UNORM;
+ r_format.format_srgb = RD::DATA_FORMAT_R8G8B8A8_SRGB;
+ image->decompress();
+ image->convert(Image::FORMAT_RGBA8);
+ }
+ r_format.swizzle_r = RD::TEXTURE_SWIZZLE_R;
+ r_format.swizzle_g = RD::TEXTURE_SWIZZLE_G;
+ r_format.swizzle_b = RD::TEXTURE_SWIZZLE_B;
+ r_format.swizzle_a = RD::TEXTURE_SWIZZLE_A;
+
+ } break; // astc 4x4
+ case Image::FORMAT_ASTC_8x8:
+ case Image::FORMAT_ASTC_8x8_HDR: {
+ if (RD::get_singleton()->texture_is_format_supported_for_usage(RD::DATA_FORMAT_ASTC_8x8_UNORM_BLOCK, RD::TEXTURE_USAGE_SAMPLING_BIT | RD::TEXTURE_USAGE_CAN_UPDATE_BIT)) {
+ r_format.format = RD::DATA_FORMAT_ASTC_8x8_UNORM_BLOCK;
+ if (p_image->get_format() == Image::FORMAT_ASTC_8x8) {
+ r_format.format_srgb = RD::DATA_FORMAT_ASTC_8x8_SRGB_BLOCK;
+ }
+ } else {
+ //not supported, reconvert
+ r_format.format = RD::DATA_FORMAT_R8G8B8A8_UNORM;
+ r_format.format_srgb = RD::DATA_FORMAT_R8G8B8A8_SRGB;
+ image->decompress();
+ image->convert(Image::FORMAT_RGBA8);
+ }
+ r_format.swizzle_r = RD::TEXTURE_SWIZZLE_R;
+ r_format.swizzle_g = RD::TEXTURE_SWIZZLE_G;
+ r_format.swizzle_b = RD::TEXTURE_SWIZZLE_B;
+ r_format.swizzle_a = RD::TEXTURE_SWIZZLE_A;
+
+ } break; // astc 8x8
default: {
}