OpenHarmony/third_party_mesa3d
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mesa: add EXT_texture_compression_latc

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The encoding/decoding algorithms are shared with RGTC.
Thanks to some magic with the base format, the RGTC texstore functions work
for LATC too.

swrast passes the related piglit tests besides two things:
- The alpha channel is wrong (it's always 1), however the incorrect alpha
  channel makes some other tests fail too, so I guess it's unrelated to LATC.
- Signed LATC fetches aren't correct yet (signed values are clamped to [0,1]),
  however RGTC has the same problem.

Further testing (with other of my patches) shows that hardware drivers
and softpipe work.

BTW, ETQW uses this extension.
This commit is contained in:
Marek Olšák
2011-03-07 02:03:52 +01:00
parent 12fa91b675
commit 7d16e2c0cd
13 changed files with 234 additions and 7 deletions
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2
src/mesa/main/extensions.c
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@@ -181,6 +181,7 @@ static const struct extension extension_table[] = {
{ "GL_EXT_texture3D", o(EXT_texture3D), GL },
{ "GL_EXT_texture_array", o(EXT_texture_array), GL },
{ "GL_EXT_texture_compression_dxt1", o(EXT_texture_compression_s3tc), GL | ES1 | ES2 },
{ "GL_EXT_texture_compression_latc", o(EXT_texture_compression_latc), GL },
{ "GL_EXT_texture_compression_rgtc", o(ARB_texture_compression_rgtc), GL },
{ "GL_EXT_texture_compression_s3tc", o(EXT_texture_compression_s3tc), GL },
{ "GL_EXT_texture_cube_map", o(ARB_texture_cube_map), GL },
@@ -483,6 +484,7 @@ _mesa_enable_sw_extensions(struct gl_context *ctx)
ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
ctx->Extensions.EXT_texture_array = GL_TRUE;
ctx->Extensions.EXT_texture_compression_latc = GL_TRUE;
ctx->Extensions.EXT_texture_env_add = GL_TRUE;
ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;