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st/mesa: honour sized internal formats in st_choose_format (v2) 

The bitcasting which is possible with shader images (and texture views?)
requires that when the user specifies a sized internal format for a
texture, we really allocate that format. To this end:

(1) find_exact_format should ignore sized internal formats and

(2) some of the entries in the mapping table corresponding to sized
    internal formats are reordered to use an RGBA format instead of
    a BGRA one.

This fixes arb_shader_image_load_store-bitcast in the (work in progress)
ARB_shader_image_load_store implementation for radeonsi.

v2: don't change the mapping of GL_RGB10: the change caused a regression
    because it preferred a format with an alpha channel, and GL_RGB10
    is not among the supported formats for shader images

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Nicolai Hähnle 2016-03-14 15:33:34 -05:00
parent 49eb5e75bd
commit a8eea696b8
1 changed files with 6 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
src/mesa/state_tracker/st_format.c
View File

@ -1114,12 +1114,12 @@ static const struct format_mapping format_map[] = {
},
{
{ GL_RGB10_A2, 0 },
{ PIPE_FORMAT_B10G10R10A2_UNORM, PIPE_FORMAT_R10G10B10A2_UNORM,
{ PIPE_FORMAT_R10G10B10A2_UNORM, PIPE_FORMAT_B10G10R10A2_UNORM,
DEFAULT_RGBA_FORMATS }
},
{
{ 4, GL_RGBA, GL_RGBA8, 0 },
{ DEFAULT_RGBA_FORMATS }
{ PIPE_FORMAT_R8G8B8A8_UNORM, DEFAULT_RGBA_FORMATS }
},
{
{ GL_BGRA, 0 },
@ -1127,7 +1127,7 @@ static const struct format_mapping format_map[] = {
},
{
{ 3, GL_RGB, GL_RGB8, 0 },
{ DEFAULT_RGB_FORMATS }
{ PIPE_FORMAT_R8G8B8X8_UNORM, DEFAULT_RGB_FORMATS }
},
{
{ GL_RGB12, GL_RGB16, 0 },
@ -2022,20 +2022,10 @@ static const struct exact_format_mapping rgbx8888_tbl[] =
{ 0, 0, 0 }
};
static const struct exact_format_mapping rgba1010102_tbl[] =
{
{ GL_BGRA, GL_UNSIGNED_INT_2_10_10_10_REV, PIPE_FORMAT_B10G10R10A2_UNORM },
/* No Mesa formats for these Gallium formats:
{ GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, PIPE_FORMAT_R10G10B10A2_UNORM },
{ GL_ABGR_EXT, GL_UNSIGNED_INT_10_10_10_2, PIPE_FORMAT_R10G10B10A2_UNORM },
{ GL_ABGR_EXT, GL_UNSIGNED_INT, PIPE_FORMAT_R10G10B10A2_UNORM },
*/
{ 0, 0, 0 }
};
/**
* If there is an exact pipe_format match for {internalFormat, format, type}
* return that, otherwise return PIPE_FORMAT_NONE so we can do fuzzy matching.
* For unsized/base internal formats, we may choose a convenient effective
* internal format for {format, type}. If one exists, return that, otherwise
* return PIPE_FORMAT_NONE.
*/
static enum pipe_format
find_exact_format(GLint internalFormat, GLenum format, GLenum type)
@ -2049,17 +2039,12 @@ find_exact_format(GLint internalFormat, GLenum format, GLenum type)
switch (internalFormat) {
case 4:
case GL_RGBA:
case GL_RGBA8:
tbl = rgba8888_tbl;
break;
case 3:
case GL_RGB:
case GL_RGB8:
tbl = rgbx8888_tbl;
break;
case GL_RGB10_A2:
tbl = rgba1010102_tbl;
break;
default:
return PIPE_FORMAT_NONE;
}