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st/mesa/i965: Allow decompressing ETC2 to GL_RGBA

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When Mesa itself implements ETC2 decompression, it currently
decompresses to formats in the GL_BGRA component order.

That can be problematic for drivers which cannot upload the texture data
as GL_BGRA, such as Virgl when it's backed by GLES on the host.

So this commit adds a flag to _mesa_unpack_etc2_format so callers can
specify the optimal component order.

In Gallium's case, it will be requested if the format isn't in
PIPE_FORMAT_B8G8R8A8_SRGB format.

For i965, it will remain GL_BGRA, as before.

v2: * Remove unnecesary include (Emil Velikov)

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Tomeu Vizoso 2018-06-22 15:59:08 +02:00 • committed by Gert Wollny
parent 1b54824687
commit e5604ef78b
4 changed files with 40 additions and 25 deletions
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2
src/mesa/drivers/dri/i965/intel_mipmap_tree.c
View file

@ -3356,7 +3356,7 @@ intel_miptree_unmap_etc(struct brw_context *brw,
else
_mesa_unpack_etc2_format(dst, mt->surf.row_pitch,
map->ptr, map->stride,
map->w, map->h, mt->etc_format);
map->w, map->h, mt->etc_format, true);
intel_miptree_unmap_raw(mt);
free(map->buffer);

56
src/mesa/main/texcompress_etc.c
View file

@ -719,7 +719,8 @@ etc2_unpack_srgb8(uint8_t *dst_row,
const uint8_t *src_row,
unsigned src_stride,
unsigned width,
unsigned height)
unsigned height,
bool bgra)
{
const unsigned bw = 4, bh = 4, bs = 8, comps = 4;
struct etc2_block block;
@ -741,11 +742,14 @@ etc2_unpack_srgb8(uint8_t *dst_row,
for (i = 0; i < w; i++) {
etc2_rgb8_fetch_texel(&block, i, j, dst,
false /* punchthrough_alpha */);
/* Convert to MESA_FORMAT_B8G8R8A8_SRGB */
tmp = dst[0];
dst[0] = dst[2];
dst[2] = tmp;
dst[3] = 255;
if (bgra) {
/* Convert to MESA_FORMAT_B8G8R8A8_SRGB */
tmp = dst[0];
dst[0] = dst[2];
dst[2] = tmp;
dst[3] = 255;
}
dst += comps;
}
@ -801,7 +805,8 @@ etc2_unpack_srgb8_alpha8(uint8_t *dst_row,
const uint8_t *src_row,
unsigned src_stride,
unsigned width,
unsigned height)
unsigned height,
bool bgra)
{
/* If internalformat is COMPRESSED_SRGB8_ALPHA8_ETC2_EAC, each 4 × 4 block
* of RGBA8888 information is compressed to 128 bits. To decode a block, the
@ -825,11 +830,13 @@ etc2_unpack_srgb8_alpha8(uint8_t *dst_row,
for (i = 0; i < w; i++) {
etc2_rgba8_fetch_texel(&block, i, j, dst);
/* Convert to MESA_FORMAT_B8G8R8A8_SRGB */
tmp = dst[0];
dst[0] = dst[2];
dst[2] = tmp;
dst[3] = dst[3];
if (bgra) {
/* Convert to MESA_FORMAT_B8G8R8A8_SRGB */
tmp = dst[0];
dst[0] = dst[2];
dst[2] = tmp;
dst[3] = dst[3];
}
dst += comps;
}
@ -1058,7 +1065,8 @@ etc2_unpack_srgb8_punchthrough_alpha1(uint8_t *dst_row,
const uint8_t *src_row,
unsigned src_stride,
unsigned width,
unsigned height)
unsigned height,
bool bgra)
{
const unsigned bw = 4, bh = 4, bs = 8, comps = 4;
struct etc2_block block;
@ -1078,11 +1086,14 @@ etc2_unpack_srgb8_punchthrough_alpha1(uint8_t *dst_row,
for (i = 0; i < w; i++) {
etc2_rgb8_fetch_texel(&block, i, j, dst,
true /* punchthrough_alpha */);
/* Convert to MESA_FORMAT_B8G8R8A8_SRGB */
tmp = dst[0];
dst[0] = dst[2];
dst[2] = tmp;
dst[3] = dst[3];
if (bgra) {
/* Convert to MESA_FORMAT_B8G8R8A8_SRGB */
tmp = dst[0];
dst[0] = dst[2];
dst[2] = tmp;
dst[3] = dst[3];
}
dst += comps;
}
@ -1206,7 +1217,8 @@ _mesa_unpack_etc2_format(uint8_t *dst_row,
unsigned src_stride,
unsigned src_width,
unsigned src_height,
mesa_format format)
mesa_format format,
bool bgra)
{
if (format == MESA_FORMAT_ETC2_RGB8)
etc2_unpack_rgb8(dst_row, dst_stride,
@ -1215,7 +1227,7 @@ _mesa_unpack_etc2_format(uint8_t *dst_row,
else if (format == MESA_FORMAT_ETC2_SRGB8)
etc2_unpack_srgb8(dst_row, dst_stride,
src_row, src_stride,
src_width, src_height);
src_width, src_height, bgra);
else if (format == MESA_FORMAT_ETC2_RGBA8_EAC)
etc2_unpack_rgba8(dst_row, dst_stride,
src_row, src_stride,
@ -1223,7 +1235,7 @@ _mesa_unpack_etc2_format(uint8_t *dst_row,
else if (format == MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC)
etc2_unpack_srgb8_alpha8(dst_row, dst_stride,
src_row, src_stride,
src_width, src_height);
src_width, src_height, bgra);
else if (format == MESA_FORMAT_ETC2_R11_EAC)
etc2_unpack_r11(dst_row, dst_stride,
src_row, src_stride,
@ -1247,7 +1259,7 @@ _mesa_unpack_etc2_format(uint8_t *dst_row,
else if (format == MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1)
etc2_unpack_srgb8_punchthrough_alpha1(dst_row, dst_stride,
src_row, src_stride,
src_width, src_height);
src_width, src_height, bgra);
}

3
src/mesa/main/texcompress_etc.h
View file

@ -77,7 +77,8 @@ _mesa_unpack_etc2_format(uint8_t *dst_row,
unsigned src_stride,
unsigned src_width,
unsigned src_height,
mesa_format format);
mesa_format format,
bool bgra);
compressed_fetch_func
_mesa_get_etc_fetch_func(mesa_format format);

4
src/mesa/state_tracker/st_cb_texture.c
View file

@ -326,10 +326,12 @@ st_UnmapTextureImage(struct gl_context *ctx,
transfer->box.width, transfer->box.height);
}
else {
bool bgra = stImage->pt->format == PIPE_FORMAT_B8G8R8A8_SRGB;
_mesa_unpack_etc2_format(itransfer->map, transfer->stride,
itransfer->temp_data, itransfer->temp_stride,
transfer->box.width, transfer->box.height,
texImage->TexFormat);
texImage->TexFormat,
bgra);
}
}