[Mesa-stable] [PATCH] mesa: allow GL_UNSIGNED_BYTE type for SNORM reads

[Dylan Baker]

Quoting Tapani Pälli (2018-08-29 21:26:08)
> 
> 
> On 08/29/2018 06:22 PM, Dylan Baker wrote:
> > Quoting Tapani Pälli (2018-08-27 04:46:37)
> >> OpenGL ES spec states:
> >>     "For normalized fixed-point rendering surfaces, the combination format
> >>      RGBA and type UNSIGNED_BYTE is accepted."
> >>
> >> This fixes following failing VK-GL-CTS tests:
> >>
> >>     KHR-GLES3.packed_pixels.pbo_rectangle.rgba8_snorm
> >>     KHR-GLES3.packed_pixels.rectangle.rgba8_snorm
> >>     KHR-GLES3.packed_pixels.varied_rectangle.rgba8_snorm
> >>
> >> Signed-off-by: Tapani Pälli <tapani.palli at intel.com>
> >> https://bugs.freedesktop.org/show_bug.cgi?id=107658
> >> Cc: mesa-stable at lists.freedesktop.org
> >> ---
> >>
> >> This is a partial fix to the bug. I believe there are 2 separate
> >> issues within reported bug and this fixes the first one.
> >>
> >>   src/mesa/main/readpix.c | 9 +++++++++
> >>   1 file changed, 9 insertions(+)
> >>
> >> diff --git a/src/mesa/main/readpix.c b/src/mesa/main/readpix.c
> >> index 2cbb578a37f..556c860d393 100644
> >> --- a/src/mesa/main/readpix.c
> >> +++ b/src/mesa/main/readpix.c
> >> @@ -958,6 +958,15 @@ read_pixels_es3_error_check(struct gl_context *ctx, GLenum format, GLenum type,
> >>                  return GL_NO_ERROR;
> >>            }
> >>         }
> >> +      if (type == GL_UNSIGNED_BYTE) {
> >> +         switch (internalFormat) {
> >> +         case GL_R8_SNORM:
> >> +         case GL_RG8_SNORM:
> >> +         case GL_RGBA8_SNORM:
> >> +            if (_mesa_has_EXT_render_snorm(ctx))
> >> +               return GL_NO_ERROR;
> >> +         }
> >> +      }
> >>         break;
> >>      case GL_BGRA:
> >>         /* GL_EXT_read_format_bgra */
> >> -- 
> >> 2.14.4
> >>
> > 
> > Hi Tapani,
> > 
> > This doesn't apply cleanly to 18.1 because "mesa: enable EXT_render_snorm
> > extension" isn't present on the branch. Does it still make sense to pull this
> > into 18.1?
> > 
> 
> Ah nope, patch makes sense only with EXT_render_snorm.
> 
> // Tapani

Cool. Thanks for following up, I've added this to the ignore list for 18.1.

Dylan
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