diff options
| author | Marek Olšák <[email protected]> | 2017-06-17 00:44:05 +0200 |
|---|---|---|
| committer | Marek Olšák <[email protected]> | 2017-06-19 20:15:36 +0200 |
| commit | f9dc29a9a53e3f16cdca56e39664257082d680bc (patch) | |
| tree | af8e6fddcbb8eaed9b2588bb53b2a4b3e3979a0b /src/gallium/drivers/radeonsi | |
| parent | 0f827b51c0b7e6120df1fedadf34b578b5bcff53 (diff) | |
radeonsi: add a workaround for inexact SNORM8 blitting again
GFX9 is affected.
We only have tests for GL_x_SNORM where x is R8, RG8, RGB8, and RGBA8.
Reviewed-by: Nicolai Hähnle <[email protected]>
Diffstat (limited to 'src/gallium/drivers/radeonsi')
| -rw-r--r-- | src/gallium/drivers/radeonsi/si_blit.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/gallium/drivers/radeonsi/si_blit.c b/src/gallium/drivers/radeonsi/si_blit.c index b240c4d355e..c62efbfa7d3 100644 --- a/src/gallium/drivers/radeonsi/si_blit.c +++ b/src/gallium/drivers/radeonsi/si_blit.c @@ -1068,6 +1068,43 @@ void si_resource_copy_region(struct pipe_context *ctx, } } + /* SNORM8 blitting has precision issues on some chips. Use the SINT + * equivalent instead, which doesn't force DCC decompression. + * Note that some chips avoid this issue by using SDMA. + */ + if (util_format_is_snorm8(dst_templ.format)) { + switch (dst_templ.format) { + case PIPE_FORMAT_R8_SNORM: + dst_templ.format = src_templ.format = PIPE_FORMAT_R8_SINT; + break; + case PIPE_FORMAT_R8G8_SNORM: + dst_templ.format = src_templ.format = PIPE_FORMAT_R8G8_SINT; + break; + case PIPE_FORMAT_R8G8B8X8_SNORM: + dst_templ.format = src_templ.format = PIPE_FORMAT_R8G8B8X8_SINT; + break; + case PIPE_FORMAT_R8G8B8A8_SNORM: + /* There are no SINT variants for ABGR and XBGR, so we have to use RGBA. */ + case PIPE_FORMAT_A8B8G8R8_SNORM: + case PIPE_FORMAT_X8B8G8R8_SNORM: + dst_templ.format = src_templ.format = PIPE_FORMAT_R8G8B8A8_SINT; + break; + case PIPE_FORMAT_A8_SNORM: + dst_templ.format = src_templ.format = PIPE_FORMAT_A8_SINT; + break; + case PIPE_FORMAT_L8_SNORM: + dst_templ.format = src_templ.format = PIPE_FORMAT_L8_SINT; + break; + case PIPE_FORMAT_L8A8_SNORM: + dst_templ.format = src_templ.format = PIPE_FORMAT_L8A8_SINT; + break; + case PIPE_FORMAT_I8_SNORM: + dst_templ.format = src_templ.format = PIPE_FORMAT_I8_SINT; + break; + default:; /* fall through */ + } + } + vi_disable_dcc_if_incompatible_format(&sctx->b, dst, dst_level, dst_templ.format); vi_disable_dcc_if_incompatible_format(&sctx->b, src, src_level, |