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mesa: fall-back to fp16 for bptc-textures

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FP16 is way more commonly supported than FP32, and requires half the
memory bandwidth. Because the internal format of BPTC is really FP16,
let's fall back to that instead.

Acked-by: Marek Olšák <marek.olsak@amd.com>
Acked-by: Soroush Kashani <soroush.kashani@imgtec.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18012>
This commit is contained in:
Erik Faye-Lund 2022-08-24 15:20:42 +02:00 • committed by Marge Bot
parent 72ad3787a3
commit 7f7c8e83df
3 changed files with 9 additions and 9 deletions
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14
src/mesa/main/texcompress_bptc.c
View file

@ -253,17 +253,17 @@ _mesa_unpack_bptc(uint8_t *dst_row,
{
switch (format) {
case MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT:
decompress_rgb_float(src_width, src_height,
src_row, src_stride,
(float *)dst_row, dst_stride,
decompress_rgb_fp16(src_width, src_height,
src_row, src_stride,
(uint16_t *)dst_row, dst_stride,
true);
break;
case MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT:
decompress_rgb_float(src_width, src_height,
src_row, src_stride,
(float *)dst_row, dst_stride,
false);
decompress_rgb_fp16(src_width, src_height,
src_row, src_stride,
(uint16_t *)dst_row, dst_stride,
false);
break;
default:

2
src/mesa/state_tracker/st_extensions.c
View file

@ -979,7 +979,7 @@ void st_init_extensions(struct pipe_screen *screen,
{ { o(ARB_texture_compression_bptc) },
{ PIPE_FORMAT_R8G8B8A8_UNORM,
PIPE_FORMAT_R8G8B8A8_SRGB,
PIPE_FORMAT_R32G32B32X32_FLOAT } },
PIPE_FORMAT_R16G16B16X16_FLOAT } },
{ { o(TDFX_texture_compression_FXT1) },
{ PIPE_FORMAT_FXT1_RGB,

2
src/mesa/state_tracker/st_format.c
View file

@ -123,7 +123,7 @@ st_mesa_format_to_pipe_format(const struct st_context *st,
switch (mesaFormat) {
case MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT:
case MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT:
return PIPE_FORMAT_R32G32B32X32_FLOAT;
return PIPE_FORMAT_R16G16B16X16_FLOAT;
default:
return _mesa_is_format_srgb(mesaFormat) ? PIPE_FORMAT_R8G8B8A8_SRGB :
PIPE_FORMAT_R8G8B8A8_UNORM;